From: Stefano Zacchiroli Date: Tue, 16 Dec 2003 17:14:45 +0000 (+0000) Subject: removed ancient pxp dir X-Git-Tag: V_0_5_1_3~74 X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=bb08a0759e85fe7fa19c4a4cfc5b159a616db34f;p=helm.git removed ancient pxp dir --- diff --git a/helm/DEVEL/pxp/.cvsignore b/helm/DEVEL/pxp/.cvsignore deleted file mode 100644 index c1fcbc4ae..000000000 --- a/helm/DEVEL/pxp/.cvsignore +++ /dev/null @@ -1,7 +0,0 @@ -*.cmo -*.cmx -*.cmi - -*.o -*.a - diff --git a/helm/DEVEL/pxp/findlib-0.4.tar.gz b/helm/DEVEL/pxp/findlib-0.4.tar.gz deleted file mode 100644 index a45cce573..000000000 Binary files a/helm/DEVEL/pxp/findlib-0.4.tar.gz and /dev/null differ diff --git a/helm/DEVEL/pxp/netstring-0.9.3.tar.gz b/helm/DEVEL/pxp/netstring-0.9.3.tar.gz deleted file mode 100644 index 8a7431e56..000000000 Binary files a/helm/DEVEL/pxp/netstring-0.9.3.tar.gz and /dev/null differ diff --git a/helm/DEVEL/pxp/netstring/.cvsignore b/helm/DEVEL/pxp/netstring/.cvsignore deleted file mode 100644 index c1fcbc4ae..000000000 --- a/helm/DEVEL/pxp/netstring/.cvsignore +++ /dev/null @@ -1,7 +0,0 @@ -*.cmo -*.cmx -*.cmi - -*.o -*.a - diff --git a/helm/DEVEL/pxp/netstring/LICENSE b/helm/DEVEL/pxp/netstring/LICENSE deleted file mode 100644 index 820032ee2..000000000 --- a/helm/DEVEL/pxp/netstring/LICENSE +++ /dev/null @@ -1,21 +0,0 @@ -Copyright 1999 by Gerd Stolpmann - -The package "netstring" is copyright by Gerd Stolpmann. - -Permission is hereby granted, free of charge, to any person obtaining -a copy of the "netstring" software (the "Software"), to deal in the -Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or -sell copies of the Software, and to permit persons to whom the -Software is furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included -in all copies or substantial portions of the Software. - -The Software is provided ``as is'', without warranty of any kind, express -or implied, including but not limited to the warranties of -merchantability, fitness for a particular purpose and noninfringement. -In no event shall Gerd Stolpmann be liable for any claim, damages or -other liability, whether in an action of contract, tort or otherwise, -arising from, out of or in connection with the Software or the use or -other dealings in the software. diff --git a/helm/DEVEL/pxp/netstring/META b/helm/DEVEL/pxp/netstring/META deleted file mode 100644 index d422128ab..000000000 --- a/helm/DEVEL/pxp/netstring/META +++ /dev/null @@ -1,54 +0,0 @@ -version = "0.9.3" -requires = "str" -description = "String processing for the Internet" - -archive(byte) = - "netstring.cma netmappings_iso.cmo netmappings_other.cmo" -archive(byte,toploop) = - "netstring.cma netmappings_iso.cmo netmappings_other.cmo - netstring_top.cmo" -archive(byte,mt) = - "netstring.cma netmappings_iso.cmo netmappings_other.cmo - netstring_mt.cmo" -archive(byte,mt,toploop) = - "netstring.cma netmappings_iso.cmo netmappings_other.cmo - netstring_mt.cmo netstring_top.cmo" -archive(native) = - "netstring.cmxa netmappings_iso.cmx netmappings_other.cmx" -archive(native,mt) = - "netstring.cmxa netmappings_iso.cmx netmappings_other.cmx - netstring_mt.cmx" - -archive(byte,netstring_only_iso) = - "netstring.cma netmappings_iso.cmo" -archive(byte,toploop,netstring_only_iso) = - "netstring.cma netmappings_iso.cmo - netstring_top.cmo" -archive(byte,mt,netstring_only_iso) = - "netstring.cma netmappings_iso.cmo - netstring_mt.cmo" -archive(byte,mt,toploop,netstring_only_iso) = - "netstring.cma netmappings_iso.cmo - netstring_mt.cmo netstring_top.cmo" -archive(native,netstring_only_iso) = - "netstring.cmxa netmappings_iso.cmx" -archive(native,mt,netstring_only_iso) = - "netstring.cmxa netmappings_iso.cmx - netstring_mt.cmx" - -archive(byte,netstring_minimum) = - "netstring.cma" -archive(byte,toploop,netstring_minimum) = - "netstring.cma - netstring_top.cmo" -archive(byte,mt,netstring_minimum) = - "netstring.cma - netstring_mt.cmo" -archive(byte,mt,toploop,netstring_minimum) = - "netstring.cma - netstring_mt.cmo netstring_top.cmo" -archive(native,netstring_minimum) = - "netstring.cmxa" -archive(native,mt,netstring_minimum) = - "netstring.cmxa - netstring_mt.cmx" diff --git a/helm/DEVEL/pxp/netstring/Makefile b/helm/DEVEL/pxp/netstring/Makefile deleted file mode 100644 index 98f9ef013..000000000 --- a/helm/DEVEL/pxp/netstring/Makefile +++ /dev/null @@ -1,151 +0,0 @@ -# make all: make bytecode archive -# make opt: make native archive -# make install: install bytecode archive, and if present, native archive -# make uninstall: uninstall package -# make clean: remove intermediate files -# make distclean: remove any superflous files -# make release: cleanup, create archive, tag CVS module -# (for developers) - -#---------------------------------------------------------------------- -# specific rules for this package: - -OBJECTS = netstring_str.cmo \ - netencoding.cmo netbuffer.cmo netstream.cmo \ - mimestring.cmo cgi.cmo base64.cmo \ - nethtml_scanner.cmo nethtml.cmo \ - neturl.cmo \ - netmappings.cmo netconversion.cmo -XOBJECTS = $(OBJECTS:.cmo=.cmx) -ARCHIVE = netstring.cma -XARCHIVE = netstring.cmxa - -NAME = netstring -REQUIRES = str - -ISO_MAPPINGS = mappings/iso*.unimap -OTHER_MAPPINGS = mappings/cp*.unimap \ - mappings/adobe*.unimap \ - mappings/jis*.unimap \ - mappings/koi*.unimap \ - mappings/mac*.unimap \ - mappings/windows*.unimap - -all: $(ARCHIVE) \ - netstring_top.cmo netstring_mt.cmo \ - netmappings_iso.cmo netmappings_other.cmo - -opt: $(XARCHIVE) \ - netstring_mt.cmx \ - netmappings_iso.cmx netmappings_other.cmx - - -$(ARCHIVE): $(OBJECTS) - $(OCAMLC) -a -o $(ARCHIVE) $(OBJECTS) - -$(XARCHIVE): $(XOBJECTS) - $(OCAMLOPT) -a -o $(XARCHIVE) $(XOBJECTS) - -netmappings_iso.ml: - $(MAKE) -C tools - test ! -d mappings || tools/unimap_to_ocaml/unimap_to_ocaml \ - -o netmappings_iso.ml $(ISO_MAPPINGS) - -netmappings_other.ml: - $(MAKE) -C tools - test ! -d mappings || tools/unimap_to_ocaml/unimap_to_ocaml \ - -o netmappings_other.ml $(OTHER_MAPPINGS) - -#---------------------------------------------------------------------- -# general rules: - -OPTIONS = -OCAMLC = ocamlc $(DEBUG) $(OPTIONS) $(ROPTIONS) -OCAMLOPT = ocamlopt $(OPTIONS) $(ROPTIONS) -OCAMLLEX = ocamllex -OCAMLDEP = ocamldep $(OPTIONS) -OCAMLFIND = ocamlfind - -DEBUG = -# Invoke with: make DEBUG=-g - -depend: *.ml *.mli - $(OCAMLDEP) *.ml *.mli >depend - -depend.pkg: Makefile - $(OCAMLFIND) use -p ROPTIONS= $(REQUIRES) >depend.pkg - -.PHONY: install -install: all - { test ! -f $(XARCHIVE) || extra="*.cmxa *.a netstring_mt.cmx netmappings_iso.cmx netmappings_other.cmx netstring_mt.o netmappings_iso.o netmappings_other.o"; }; \ - $(OCAMLFIND) install $(NAME) *.mli *.cmi *.cma netstring_top.cmo netstring_mt.cmo netmappings_iso.cmo netmappings_other.cmo META $$extra - -.PHONY: install-cgi -install-cgi: - $(OCAMLFIND) install cgi compat-cgi/META - - -.PHONY: install-base64 -install-base64: - $(OCAMLFIND) install base64 compat-base64/META - - -.PHONY: uninstall -uninstall: - $(OCAMLFIND) remove $(NAME) - -.PHONY: uninstall-cgi -uninstall-cgi: - $(OCAMLFIND) remove cgi - -.PHONY: uninstall-base64 -uninstall-base64: - $(OCAMLFIND) remove base64 - -.PHONY: clean -clean: - rm -f *.cmi *.cmo *.cma *.cmx *.o *.a *.cmxa - test ! -d mappings || rm -f netmappings_iso.ml netmappings_other.ml - -.PHONY: distclean -distclean: - rm -f *.cmi *.cmo *.cma *.cmx *.o *.a *.cmxa - rm -f *~ depend depend.pkg compat-cgi/*~ compat-base64/*~ - $(MAKE) -C tests distclean - $(MAKE) -C doc distclean - $(MAKE) -C tools distclean - -RELEASE: META - awk '/version/ { print substr($$3,2,length($$3)-2) }' META >RELEASE - -.PHONY: dist -dist: RELEASE - r=`head -1 RELEASE`; cd ..; gtar czf $(NAME)-$$r.tar.gz --exclude='*/CVS*' --exclude="*/depend.pkg" --exclude="*/depend" --exclude="*/doc/common.xml" --exclude="*/doc/config.xml" --exclude="*/doc/readme.dtd" --exclude="*/Mail" --exclude="*/mappings" $(NAME) - -.PHONY: tag-release -tag-release: RELEASE - r=`head -1 RELEASE | sed -e s/\\\./-/g`; cd ..; cvs tag -F $(NAME)-$$r $(NAME) - -.PHONY: release -release: distclean - test -f netmappings_iso.ml - test -f netmappings_other.ml - $(MAKE) tag-release - $(MAKE) dist - -.SUFFIXES: .cmo .cmi .cmx .ml .mli .mll - -.ml.cmx: - $(OCAMLOPT) -c -thread $< - -.ml.cmo: - $(OCAMLC) -c -thread $< - -.mli.cmi: - $(OCAMLC) -c $< - -.mll.ml: - $(OCAMLLEX) $< - -include depend -include depend.pkg diff --git a/helm/DEVEL/pxp/netstring/RELEASE b/helm/DEVEL/pxp/netstring/RELEASE deleted file mode 100644 index 965065db5..000000000 --- a/helm/DEVEL/pxp/netstring/RELEASE +++ /dev/null @@ -1 +0,0 @@ -0.9.3 diff --git a/helm/DEVEL/pxp/netstring/base64.ml b/helm/DEVEL/pxp/netstring/base64.ml deleted file mode 100644 index 285626f77..000000000 --- a/helm/DEVEL/pxp/netstring/base64.ml +++ /dev/null @@ -1,24 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -let encode s = Netencoding.Base64.encode s;; -let url_encode s = Netencoding.Base64.url_encode s;; -let decode s = Netencoding.Base64.decode s;; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.2 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.1 2000/03/02 01:15:20 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/base64.mli b/helm/DEVEL/pxp/netstring/base64.mli deleted file mode 100644 index 5dd60ea75..000000000 --- a/helm/DEVEL/pxp/netstring/base64.mli +++ /dev/null @@ -1,36 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -(**********************************************************************) -(* Base64 compatibility module *) -(**********************************************************************) - -(* PLEASE DO NOT USE THIS MODULE IN NEW SOFTWARE! - * The module Netencoding.Base64 is the preferred API. This module is - * only for compatibility with older software. - *) - -(* This interface is compatible with all previously released Base64 - * modules (0.1 and 0.2). - *) - -val encode : string -> string - -val url_encode : string -> string - -val decode : string -> string - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.1 2000/03/02 01:15:20 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/cgi.ml b/helm/DEVEL/pxp/netstring/cgi.ml deleted file mode 100644 index 48412be29..000000000 --- a/helm/DEVEL/pxp/netstring/cgi.ml +++ /dev/null @@ -1,645 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -exception Resources_exceeded - -type argument_processing = Memory | File | Automatic;; - -type argument = - { mutable arg_name : string; - mutable arg_processing : argument_processing; - mutable arg_buf_value : Buffer.t; - mutable arg_mem_value : string option; - (* Here, the value is stored if it must be kept in memory *) - mutable arg_disk_value : string Weak.t; - (* This component is used iff arg_mem_value = None. The - * weak array has a length of 1, and the single element stores - * the value (if any). - *) - mutable arg_file : string option; - (* The filename of the temporary file storing the value *) - mutable arg_fd : out_channel option; - (* The file descriptor of the temp file (if open) *) - mutable arg_mimetype : string; - mutable arg_filename : string option; - mutable arg_header : (string * string) list; - (* For the last three components, see the description of the - * corresponding functions in the mli file. - *) - } -;; - -type workaround = - Work_around_MSIE_Content_type_bug - | Work_around_backslash_bug -;; - -type config = - { maximum_content_length : int; - how_to_process_arguments : argument -> argument_processing; - tmp_directory : string; - tmp_prefix : string; - workarounds : workaround list; - } -;; - - -let print_argument arg = - Format.printf - "" - arg.arg_name - (match arg.arg_filename with None -> "*" | Some n -> n) - arg.arg_mimetype - (match arg.arg_file with None -> "Memory" | Some n -> n) -;; - - -let encode = Netencoding.Url.encode ;; -let decode = Netencoding.Url.decode ;; - - - -let url_split_re = - Str.regexp "[&=]";; - - -let mk_url_encoded_parameters nv_pairs = - String.concat "&" - (List.map - (fun (name,value) -> - let name_encoded = Netencoding.Url.encode name in - let value_encoded = Netencoding.Url.encode value in - name_encoded ^ "=" ^ value_encoded - ) - nv_pairs - ) -;; - - -let dest_url_encoded_parameters parstr = - - let rec parse_after_amp tl = - match tl with - Str.Text name :: Str.Delim "=" :: Str.Text value :: tl' -> - (Netencoding.Url.decode name, - Netencoding.Url.decode value) :: parse_next tl' - | Str.Text name :: Str.Delim "=" :: Str.Delim "&" :: tl' -> - (Netencoding.Url.decode name, "") :: parse_after_amp tl' - | Str.Text name :: Str.Delim "=" :: [] -> - [Netencoding.Url.decode name, ""] - | _ -> - failwith "Cgi.dest_url_encoded_parameters" - and parse_next tl = - match tl with - [] -> [] - | Str.Delim "&" :: tl' -> - parse_after_amp tl' - | _ -> - failwith "Cgi.dest_url_encoded_parameters" - in - let toklist = Str.full_split url_split_re parstr in - match toklist with - [] -> [] - | _ -> parse_after_amp toklist -;; - - -let mk_form_encoded_parameters ntv_triples = - failwith "Cgi.mk_form_encoded_parameters: not implemented";; - - -let dest_parameter_header header options = - let get_name s = - (* s is: form-data; ... name="fieldname" ... - * Extract "fieldname" - *) - try - let tok, params = Mimestring.scan_value_with_parameters s options in - List.assoc "name" params - with - Not_found -> - failwith "Cgi.dest_form_encoded_parameters" - | Failure "Mimestring.scan_value_with_parameters" -> - failwith "Cgi.dest_form_encoded_parameters" - in - - let get_filename s = - (* s is: form-data; ... filename="fieldname" ... - * Extract "fieldname" - *) - try - let tok, params = Mimestring.scan_value_with_parameters s options in - Some(List.assoc "filename" params) - with - Not_found -> - None - | Failure "Mimestring.scan_value_with_parameters" -> - failwith "Cgi.dest_form_encoded_parameters" - in - - let mime_type = - try List.assoc "content-type" header - with Not_found -> "text/plain" in (* the default *) - - let content_disposition = - try List.assoc "content-disposition" header - with - Not_found -> - failwith "Cgi.dest_form_encoded_parameters: no content-disposition" - in - - let name = get_name content_disposition in - let filename = get_filename content_disposition in - - name, mime_type, filename -;; - - -let dest_form_encoded_parameters parstr ~boundary config = - let options = - if List.mem Work_around_backslash_bug config.workarounds then - [ Mimestring.No_backslash_escaping ] - else - [] - in - let parts = - Mimestring.scan_multipart_body_and_decode - parstr 0 (String.length parstr) boundary in - List.map - (fun (params, value) -> - - let name, mime_type, filename = dest_parameter_header params options in - { arg_name = name; - arg_processing = Memory; - arg_buf_value = Buffer.create 1; - arg_mem_value = Some value; - arg_disk_value = Weak.create 1; - arg_file = None; - arg_fd = None; - arg_mimetype = mime_type; - arg_filename = filename; - arg_header = params; - } - - ) - parts -;; - - -let make_temporary_file config = - (* Returns (filename, out_channel). *) - let rec try_creation n = - try - let fn = - Filename.concat - config.tmp_directory - (config.tmp_prefix ^ "-" ^ (string_of_int n)) - in - let fd = - open_out_gen - [ Open_wronly; Open_creat; Open_excl; Open_binary ] - 0o666 - fn - in - fn, fd - with - Sys_error m -> - (* This does not look very intelligent, but it is the only chance - * to limit the number of trials. - *) - if n > 1000 then - failwith ("Cgi: Cannot create temporary file: " ^ m); - try_creation (n+1) - in - try_creation 0 -;; - - -let dest_form_encoded_parameters_from_netstream s ~boundary config = - let parts = ref [] in - let options = - if List.mem Work_around_backslash_bug config.workarounds then - [ Mimestring.No_backslash_escaping ] - else - [] - in - - let create header = - (* CALLBACK for scan_multipart_body_from_netstream *) - let name, mime_type, filename = dest_parameter_header header options in - let p0 = - { arg_name = name; - arg_processing = Memory; - arg_buf_value = Buffer.create 80; - arg_mem_value = None; - arg_disk_value = Weak.create 1; - arg_file = None; - arg_fd = None; - arg_mimetype = mime_type; - arg_filename = filename; - arg_header = header; - } - in - let pr = config.how_to_process_arguments p0 in - let p = { p0 with arg_processing = pr } in - if pr = File then begin - let fn, fd = make_temporary_file config in - p.arg_file <- Some fn; - p.arg_fd <- Some fd; - p.arg_mem_value <- None; - end; - p - in - - let add p s k n = - (* CALLBACK for scan_multipart_body_from_netstream *) - if (p.arg_processing = Automatic) && - (Buffer.length (p.arg_buf_value) >= Netstream.block_size s) then begin - (* This is a LARGE argument *) - p.arg_processing <- File; - let fn, fd = make_temporary_file config in - p.arg_file <- Some fn; - p.arg_fd <- Some fd; - p.arg_mem_value <- None; - output_string fd (Buffer.contents p.arg_buf_value); - p.arg_buf_value <- Buffer.create 1; - end; - - match p.arg_processing with - (Memory|Automatic) -> - Buffer.add_substring - p.arg_buf_value - (Netbuffer.unsafe_buffer (Netstream.window s)) - k - n - | File -> - let fd = match p.arg_fd with Some fd -> fd | None -> assert false in - output - fd - (Netbuffer.unsafe_buffer (Netstream.window s)) - k - n; - in - - let stop p = - (* CALLBACK for scan_multipart_body_from_netstream *) - begin match p.arg_processing with - (Memory|Automatic) -> - p.arg_mem_value <- Some (Buffer.contents p.arg_buf_value); - p.arg_buf_value <- Buffer.create 1; - | File -> - let fd = match p.arg_fd with Some fd -> fd | None -> assert false in - close_out fd; - p.arg_mem_value <- None - end; - parts := p :: !parts - in - - Mimestring.scan_multipart_body_from_netstream - s - boundary - create - add - stop; - - List.rev !parts -;; - - -let getenv name = - try Sys.getenv name with Not_found -> "";; - -(* getenv: - * We use this getenv instead of Sys.getenv. The CGI specification does not - * say anything about what should happen if a certain environment variable - * is not set. - * Some servers initialize the environment variable to the empty string if - * it is not applicable, some servers do not set the variable at all. Because - * of this, unset variables are always reported as empty variables. - * - * This is especially a problem with QUERY_STRING. - *) - -let mk_simple_arg ~name v = - { arg_name = name; - arg_processing = Memory; - arg_buf_value = Buffer.create 1; - arg_mem_value = Some v; - arg_disk_value = Weak.create 0; - arg_file = None; - arg_fd = None; - arg_mimetype = "text/plain"; - arg_filename = None; - arg_header = []; - } -;; - -let mk_memory_arg ~name ?(mime = "text/plain") ?filename ?(header = []) v = - { arg_name = name; - arg_processing = Memory; - arg_buf_value = Buffer.create 1; - arg_mem_value = Some v; - arg_disk_value = Weak.create 0; - arg_file = None; - arg_fd = None; - arg_mimetype = mime; - arg_filename = filename; - arg_header = header; - } -;; - -let mk_file_arg - ~name ?(mime = "text/plain") ?filename ?(header = []) v_filename = - let v_abs_filename = - if Filename.is_relative v_filename then - Filename.concat (Sys.getcwd()) v_filename - else - v_filename - in - { arg_name = name; - arg_processing = File; - arg_buf_value = Buffer.create 1; - arg_mem_value = None; - arg_disk_value = Weak.create 0; - arg_file = Some v_abs_filename; - arg_fd = None; - arg_mimetype = mime; - arg_filename = filename; - arg_header = header; - } -;; - - -let get_content_type config = - (* Get the environment variable CONTENT_TYPE; if necessary apply - * workarounds for browser bugs. - *) - let content_type = getenv "CONTENT_TYPE" in - let user_agent = getenv "HTTP_USER_AGENT" in - let eff_content_type = - if Str.string_match (Str.regexp ".*MSIE") user_agent 0 && - List.mem Work_around_MSIE_Content_type_bug config.workarounds - then begin - (* Microsoft Internet Explorer: When used with SSL connections, - * this browser sometimes produces CONTENT_TYPEs like - * "multipart/form-data; boundary=..., multipart/form-data; boundary=..." - * Workaround: Throw away everything after ", ". - *) - if Str.string_match (Str.regexp "\\([^,]*boundary[^,]*\\), .*boundary") - content_type 0 - then - Str.matched_group 1 content_type - else - content_type - end - else - content_type - in - eff_content_type -;; - - -let really_parse_args config = - let make_simple_arg (n,v) = mk_simple_arg n v in - - match getenv "REQUEST_METHOD" with - ("GET"|"HEAD") -> - List.map - make_simple_arg - (dest_url_encoded_parameters(getenv "QUERY_STRING")) - - | "POST" -> - let n = - try - int_of_string (getenv "CONTENT_LENGTH") - with - _ -> failwith "Cgi.parse_arguments" - in - if n > config.maximum_content_length then - raise Resources_exceeded; - begin - let mime_type, params = - Mimestring.scan_mime_type(get_content_type config) [] in - match mime_type with - "application/x-www-form-urlencoded" -> - let buf = String.create n in - really_input stdin buf 0 n; - List.map - make_simple_arg - (dest_url_encoded_parameters buf) - | "multipart/form-data" -> - let boundary = - try - List.assoc "boundary" params - with - Not_found -> - failwith "Cgi.parse_arguments" - in - (* -------------------------------------------------- DEBUG - let f = open_out "/tmp/cgiout" in - output_string f buf; - close_out f; - * -------------------------------------------------- - *) - dest_form_encoded_parameters_from_netstream - (Netstream.create_from_channel stdin (Some n) 4096) - boundary - config - | _ -> - failwith ("Cgi.parse_arguments: unknown content-type " ^ mime_type) - end - | _ -> - failwith "Cgi.parse_arguments: unknown method" - -let parsed = ref None;; (* protected by lock/unlock *) - -let lock = ref (fun () -> ());; -let unlock = ref (fun () -> ());; - -let init_mt new_lock new_unlock = - lock := new_lock; - unlock := new_unlock -;; - -let protect f = - !lock(); - try - let r = f() in - !unlock(); - r - with - x -> - !unlock(); - raise x -;; - -let parse_arguments config = - protect - (fun () -> - match !parsed with - Some _ -> () - | None -> - parsed := Some (List.map - (fun arg -> arg.arg_name, arg) - (really_parse_args config)) - ) -;; - -let arguments () = - protect - (fun () -> - match !parsed with - Some plist -> plist - | None -> - failwith "Cgi.arguments" - ) -;; - -let set_arguments arglist = - protect - (fun () -> - parsed := Some (List.map - (fun arg -> arg.arg_name, arg) - arglist) - ) -;; - -let default_config = - { maximum_content_length = max_int; - how_to_process_arguments = (fun _ -> Memory); - tmp_directory = "/var/tmp"; - tmp_prefix = "cgi-"; - workarounds = [ Work_around_MSIE_Content_type_bug; - Work_around_backslash_bug; - ] - } -;; - -let arg_value arg = - match arg.arg_mem_value with - None -> - begin - match Weak.get arg.arg_disk_value 0 with - None -> - begin - match arg.arg_file with - None -> - failwith "Cgi.arg_value: no value present" - | Some filename -> - let fd = open_in_bin filename in - try - let len = in_channel_length fd in - let s = String.create len in - really_input fd s 0 len; - Weak.set arg.arg_disk_value 0 (Some s); - close_in fd; - s - with - any -> close_in fd; raise any - end - | Some v -> v - end - | Some s -> - s -;; - -let arg_name arg = arg.arg_name;; -let arg_file arg = arg.arg_file;; -let arg_mimetype arg = arg.arg_mimetype;; -let arg_filename arg = arg.arg_filename;; -let arg_header arg = arg.arg_header;; - -let cleanup () = - protect - (fun () -> - match !parsed with - None -> () - | Some plist -> - List.iter - (fun (name, arg) -> - match arg.arg_file with - None -> () - | Some filename -> - (* We do not complain if the file does not exist anymore. *) - if Sys.file_exists filename then - Sys.remove filename; - arg.arg_file <- None - ) - plist - ) -;; - -let argument name = List.assoc name (arguments());; -let argument_value name = arg_value (argument name);; - -module Operators = struct - let ( !% ) = argument - let ( !$ ) = argument_value -end;; - - -let parse_args() = - parse_arguments default_config; - List.map - (fun (name, arg) -> name, arg_value arg) - (arguments()) -;; - -let parse_args_with_mimetypes() = - parse_arguments default_config; - List.map - (fun (name, arg) -> name, arg_mimetype arg, arg_value arg) - (arguments()) -;; - -let header s = - let t = - match s with - "" -> "text/html" - | _ -> s - in - print_string ("Content-type: " ^ t ^ "\n\n"); - flush stdout -;; - - -let this_url() = - "http://" ^ (getenv "SERVER_NAME") ^ (getenv "SCRIPT_NAME") -;; - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.8 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.7 2000/06/25 21:40:36 gerd - * Added printer. - * - * Revision 1.6 2000/06/25 21:15:48 gerd - * Checked thread-safety. - * - * Revision 1.5 2000/05/16 22:29:36 gerd - * Added support for two common file upload bugs. - * - * Revision 1.4 2000/04/15 16:47:27 gerd - * Last minor changes before releasing 0.6. - * - * Revision 1.3 2000/04/15 13:09:01 gerd - * Implemented uploads to temporary files. - * - * Revision 1.2 2000/03/02 01:15:30 gerd - * Updated. - * - * Revision 1.1 2000/02/25 15:21:12 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/cgi.mli b/helm/DEVEL/pxp/netstring/cgi.mli deleted file mode 100644 index 8aea499d8..000000000 --- a/helm/DEVEL/pxp/netstring/cgi.mli +++ /dev/null @@ -1,419 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -(* FOR SIMPLE CGI PROGRAMS: - * - * If you do not need all the features of the API below, the following may - * be enough: - * - * - At the beginning of the main program, call 'parse_argument' with - * either 'default_config' as argument or with a customized configuration. - * - Use 'argument_value(name)' to get the string value of the CGI parameter - * 'name'. If you like, you can also open the Cgi.Operators module and - * write '!$ name' instead. Here, !$ is a prefix operator equivalent to - * argument_value. - * - * If you do not change the default configuration, you do not need to - * worry about temporary files - there are not any. - * - * Most of the other functions defined below deal with file uploads, and - * are only useful for that. - *) - - -(**********************************************************************) -(* CGI functions *) -(**********************************************************************) - -(* First, the general interface to the CGI argument parser. *) - -exception Resources_exceeded - -type argument - -type argument_processing = - Memory (* Keep the value of the argument in memory *) - | File (* Store the value of the argument into a temporary file *) - | Automatic (* Store only large arguments into files. An argument - * value is large if it is longer than about one block (4K). - * This is not an exact definition. - *) - -type workaround = - Work_around_MSIE_Content_type_bug - (* There is a bug in MSIE I observed together with SSL connections. - * The CONTENT_TYPE passed to the server has sometimes the wrong - * format. This option enables a workaround if the user agent string - * contains the word "MSIE". - *) - | Work_around_backslash_bug - (* There is a bug in many browsers: The backslash character is not - * handled as an escaping character in MIME headers. Because DOS- - * based systems use the backslash regularly in filenames, this bug - * matters. - * This option changes the interpretation of backslashes such that - * these are handled as normal characters. I do not know any browser - * that is not affected by this bug, so there is no check on - * the user agent string. - *) - - -type config = - { maximum_content_length : int; - (* The maximum CONTENT_LENGTH. Bigger requests trigger an - * Resources_exceeded exception. This feature can be used - * to detect primitive denial-of-service attacks. - *) - how_to_process_arguments : argument -> argument_processing; - (* After the beginning of an argument has been decoded, the - * type of processing is decided by invoking this function on - * the argument. Note that the passed argument is incomplete - - * it does not have a value. You can assume that name, filename, - * MIME type and the whole header are already known. - * - THIS CONFIGURATION PARAMETER ONLY AFFECTS ARGUMENTS - * "POST"ED FROM THE CLIENT IN FORM-ENCODED REPRESENTATION. - * All other transport methods can only handle the Memory - * processing type. - *) - tmp_directory : string; - (* The temporary directory to use for the temporary files. *) - tmp_prefix : string; - (* A prefix for temporary files. It is recommended that the prefix - * contains a part that is random or that depends on rapidly changing - * environment properties. For example, the process ID is a good - * candidate, or the current system time. It is not required that - * the prefix is unique; there is a fail-safe algorithm that - * computes a unique file name from the prefix, even if several - * CGI programs run concurrently. - *) - workarounds : workaround list; - (* Specifies which workarounds should be enabled. *) - } - -val parse_arguments : config -> unit -val arguments : unit -> (string * argument) list - (* - let () = parse_arguments config: - * Decodes the CGI arguments. 'config' specifies limits and processing - * hints; you can simply pass default_config (see below). - * - * - let arglist = get_arguments(): - * The function returns a list with (name, arg) pairs. The name is - * passed back as string while the value is returned as opaque type - * 'argument'. Below accessor functions are defined. These functions - * require that parse_arguments was invoked before. - * - * Note 1: You can invoke 'parse_arguments' several times, but only - * the first time the arguments are read in. If you call the function - * again, it does nothing (even if the config changes). This is also - * true if 'parse_arguments' has been invoked after 'set_arguments'. - * - * Note 2: It is not guaranteed that stdin has been read until EOF. - * Only CONTENT_LENGTH bytes are read from stdin (following the CGI spec). - * - * Note 3: If arguments are processed in File or Automatic mode, the - * caller of 'parse_arguments' is responsible for deleting the files - * after use. You may consider to apply the at_exit function of the - * core library for this purpose. See also 'cleanup' below. - *) - -val set_arguments : argument list -> unit - (* Alternatively, you can set the arguments to use. This overrides any - * previously parsed set of arguments, and also any following parsing. - * - Intended for debugging, and to make it possible to replace the - * CGI parser by a different one while retaining this API. - *) - -val default_config : config - (* maximum_content_length = maxint - * how_to_process_arguments = "use always Memory" - * tmp_directory = "/var/tmp" - * tmp_prefix = "cgi" - * workarounds = [ Work_around_MSIE_content_type_bug; - * Work_around_backslash_bug; - * ] - * - * Note 1: On some Unixes, a special file system is used for /tmp that - * stores the files into the virtual memory (main memory or swap area). - * Because of this, /var/tmp is preferred as default. - * - * Note 2: Filename.temp_file is not used because it depends on - * environment variables which are usually not set in a CGI environment. - *) - -val arg_name : argument -> string -val arg_value : argument -> string -val arg_file : argument -> string option -val arg_mimetype : argument -> string -val arg_filename : argument -> string option -val arg_header : argument -> (string * string) list - (* The accessor functions that return several aspects of arguments. - * arg_name: returns the name of the argument - * arg_value: returns the value of the argument. If the value is stored - * in a temporary file, the contents of this file are returned, i.e. - * the file is loaded. This may have some consequences: - * (1) The function may fail because of I/O errors. - * (2) The function may be very slow, especially if the file is - * non-local. - * (3) If the value is bigger than Sys.max_string_length, the function - * raises the exception Resources_exceeded. On 32 bit architectures, - * strings are limited to 16 MB. - * Note that loaded values are put into weak arrays. This makes it - * possible that subsequent calls of 'arg_value' on the same argument - * can avoid loading the value again, and that unused values will - * nevertheless be collected by the GC. - * arg_file: returns 'Some filename' if the value resides in a temporary - * file, and 'filename' is the absolute path of this file. If the - * value is only available in memory, None is returned. - * arg_mimetype: returns the MIME type of the argument. Note that the - * default MIME type is "text/plain", and that the default is returned - * if the MIME type is not available. - * arg_filename: returns 'Some filename' if the argument is associated - * with a certain filename (e.g. from a file upload); otherwise None - * arg_header: returns pairs (name,value) containing the complete header - * of the argument. If the transmission protocol does not specify - * a header, the empty list is passed back. - *) - -val mk_simple_arg : name:string -> string -> argument - (* mk_simple_arg name value: - * Creates a simple argument with only name, and a value passed by string. - * The MIME type is "text/plain". - *) - -val mk_memory_arg - : name:string -> ?mime:string -> ?filename:string -> - ?header:((string * string) list) -> string -> argument - (* mk_memory_arg name mimetype filename header value: - * Creates an argument whose value is kept in memory. - * - * Note: The signature of this function changed in release 0.8. - *) - -val mk_file_arg - : name:string -> ?mime:string -> ?filename:string -> - ?header:((string * string) list) -> string -> argument - (* mk_file_arg name mimetype filename header value_filename: - * Creates an argument whose value is stored in the file - * 'value_filename'. If this file name is not absolute, it is interpreted - * relative to the directory returned by Sys.getcwd() - this might not - * be what you want with respect to mount points and symlinks (and it - * depends on the operating system as getcwd is only POSIX.1). The - * file name is turned into an absolute name immediately, and the - * function arg_file returns the rewritten name. - * - * Note: The signature of this function changed in release 0.8. - *) - - -val cleanup : unit -> unit - (* Removes all temporary files that occur in the current set of arguments - * (as returned by 'arguments()'). - *) - - -(* Convenience functions: *) - -val argument : string -> argument - (* let argument name = List.assoc name (arguments()) -- i.e. returns - * the argument with the passed name. Of course, this function expects - * that 'parse_arguments' was called before. - *) - -val argument_value : string -> string - (* let argument_value name = arg_value(argument name) -- i.e. returns - * the value of the argument. - * See also Operators.( !$ ) below. - *) - -(* For toploop printers: *) - -val print_argument : argument -> unit - - -(* Now, the compatibility functions. *) - -val parse_args : unit -> (string * string) list - (* Decodes the arguments of the CGI and returns them as an association list - * Works whatever the method is (GET or POST) - *) - -val parse_args_with_mimetypes : unit -> (string * string * string) list - (* Like parse_args, but returns also the MIME type. - * The triples contain (name, mime_type, value). - * If an encoding was chosen that does not transfer the MIME type, - * "text/plain" is returned. - * - * THIS FUNCTION SHOULD BE CONSIDERED AS DEPRECATED. - * It was included in netstring-0.4, but most people want not only - * the MIME type. parse_arguments should be used instead. - *) - -val header : string -> unit - (* Prints the content-type header. - * the argument is the MIME type (default value is "text/html" if the - * argument is the empty string) - *) - -val this_url : unit -> string - (* Returns the address of the CGI *) - -(**********************************************************************) -(* The Operators module *) -(**********************************************************************) - -(* If you open the Operators module, you can write - * !% "name" instead of argument "name", and - * !$ "name" instead of argument_value "name" - *) - -module Operators : sig - val ( !% ) : string -> argument - (* same as 'argument' above *) - val ( !$ ) : string -> string - (* same as 'argument_value' above *) -end - -(**********************************************************************) -(* Low-level functions *) -(**********************************************************************) - -(* Encoding/Decoding within URLs: - * - * The following two functions perform the '%'-substitution for - * characters that may otherwise be interpreted as metacharacters. - * - * See also the Netencoding module. This interface contains these functions - * to keep the compatibility with the old Cgi module. - *) - -val decode : string -> string -val encode : string -> string - -(* URL-encoded parameters: - * - * The following two functions create and analyze URL-encoded parameters. - * Format: name1=val1&name2=val2&... - *) - -val mk_url_encoded_parameters : (string * string) list -> string - (* The argument is a list of (name,value) pairs. The result is the - * single URL-encoded parameter string. - *) - -val dest_url_encoded_parameters : string -> (string * string) list - (* The argument is the URL-encoded parameter string. The result is - * the corresponding list of (name,value) pairs. - * Note: Whitespace within the parameter string is ignored. - * If there is a format error, the function fails. - *) - -(* Form-encoded parameters: - * - * According to: RFCs 2388, 2183, 2045, 2046 - * - * General note: This is a simple API to encode/decode form-encoded parameters. - * Especially, it is not possible to pass the header of the parts through - * this API. - *) - -val mk_form_encoded_parameters : (string * string * string) list -> - (string * string) - (* The argument is a list of (name,mimetype,value) triples. - * The result is (parstr, boundary), where 'parstr' is the - * single form-encoded parameter string, and 'boundary' is the - * boundary to separate the message parts. - * - * THIS FUNCTION IS CURRENTLY NOT IMPLEMENTED! - *) - -val dest_form_encoded_parameters : string -> boundary:string -> config -> - argument list - (* The first argument is the form-encoded parameter string. - * The second argument is the boundary (extracted from the mime type). - * Third argument: Only the workarounds component is used. - * The result is - * the corresponding list of arguments (all in memory). - * If there is a format error, the function fails. - * Note: embedded multipart/mixed types are returned as they are, - * and are not recursively decoded. - * Note: The content-transfer-encodings "7bit", "8bit", "binary", - * "base64", and "quoted-printable" are supported. - * Note: Parameter names which include spaces or non-alphanumeric - * characters may be problematic (the rules of RFC 2047 are NOT applied). - * Note: The returned MIME type is not normalized. - *) - -val dest_form_encoded_parameters_from_netstream - : Netstream.t -> boundary:string -> config -> argument list - (* let arglist = dest_form_encoded_parameters_from_netstream s b c: - * Reads the form-encoded parameters from netstream s. The boundary - * is passed in b, and the configuration in c. - * A list of arguments is returned. - * - * See also dest_form_encoded_parameters. - * - * Restriction: In contrast to dest_form_encoded_parameters, this - * function is not able to handle the content-transfer-encodings - * "base64" and "quoted-printable". (This is not really a restriction - * because no browser uses these encodings in conjunction with HTTP. - * This is different if mail transport is chosen. - The reason for - * this restriction is that there are currently no stream functions - * for decoding.) - *) - -(* Private functions: *) - -val init_mt : (unit -> unit) -> (unit -> unit) -> unit - - -(**********************************************************************) -(* Compatibility with CGI library by J.-C. Filliatre *) -(**********************************************************************) - -(* The following functions are compatible with J.-C. Filliatre's CGI - * library: - * - * parse_args, header, this_url, decode, encode. - * - * Note that the new implementation of parse_args can be safely invoked - * several times. - * - * Since release 0.8, Netstring's CGI implementation is again thread-safe. - *) - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.8 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.7 2000/06/25 21:40:36 gerd - * Added printer. - * - * Revision 1.6 2000/06/25 21:15:48 gerd - * Checked thread-safety. - * - * Revision 1.5 2000/05/16 22:28:13 gerd - * New "workarounds" config component. - * - * Revision 1.4 2000/04/15 16:47:27 gerd - * Last minor changes before releasing 0.6. - * - * Revision 1.3 2000/04/15 13:09:01 gerd - * Implemented uploads to temporary files. - * - * Revision 1.2 2000/03/02 01:15:30 gerd - * Updated. - * - * Revision 1.1 2000/02/25 15:21:12 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/compat-base64/META b/helm/DEVEL/pxp/netstring/compat-base64/META deleted file mode 100644 index a5c003ea4..000000000 --- a/helm/DEVEL/pxp/netstring/compat-base64/META +++ /dev/null @@ -1,3 +0,0 @@ -version = "0.5" -requires = "netstring" -description = "Compatibility with base64" diff --git a/helm/DEVEL/pxp/netstring/compat-cgi/META b/helm/DEVEL/pxp/netstring/compat-cgi/META deleted file mode 100644 index 2294921a0..000000000 --- a/helm/DEVEL/pxp/netstring/compat-cgi/META +++ /dev/null @@ -1,3 +0,0 @@ -version = "0.5" -requires = "netstring" -description = "Compatibility with cgi" diff --git a/helm/DEVEL/pxp/netstring/depend b/helm/DEVEL/pxp/netstring/depend deleted file mode 100644 index 5991264c6..000000000 --- a/helm/DEVEL/pxp/netstring/depend +++ /dev/null @@ -1,36 +0,0 @@ -base64.cmo: netencoding.cmi base64.cmi -base64.cmx: netencoding.cmx base64.cmi -cgi.cmo: mimestring.cmi netbuffer.cmi netencoding.cmi netstream.cmi cgi.cmi -cgi.cmx: mimestring.cmx netbuffer.cmx netencoding.cmx netstream.cmx cgi.cmi -mimestring.cmo: netbuffer.cmi netencoding.cmi netstream.cmi netstring_str.cmi \ - mimestring.cmi -mimestring.cmx: netbuffer.cmx netencoding.cmx netstream.cmx netstring_str.cmx \ - mimestring.cmi -netbuffer.cmo: netbuffer.cmi -netbuffer.cmx: netbuffer.cmi -netconversion.cmo: netmappings.cmi netconversion.cmi -netconversion.cmx: netmappings.cmx netconversion.cmi -netencoding.cmo: netstring_str.cmi netencoding.cmi -netencoding.cmx: netstring_str.cmx netencoding.cmi -nethtml.cmo: nethtml.cmi -nethtml.cmx: nethtml.cmi -netmappings.cmo: netmappings.cmi -netmappings.cmx: netmappings.cmi -netmappings_iso.cmo: netmappings.cmi -netmappings_iso.cmx: netmappings.cmx -netmappings_other.cmo: netmappings.cmi -netmappings_other.cmx: netmappings.cmx -netstream.cmo: netbuffer.cmi netstream.cmi -netstream.cmx: netbuffer.cmx netstream.cmi -netstring_mt.cmo: cgi.cmi netmappings.cmi netstring_str.cmi netstring_mt.cmi -netstring_mt.cmx: cgi.cmx netmappings.cmx netstring_str.cmx netstring_mt.cmi -netstring_str.cmo: netstring_str.cmi -netstring_str.cmx: netstring_str.cmi -netstring_top.cmo: netstring_top.cmi -netstring_top.cmx: netstring_top.cmi -neturl.cmo: netencoding.cmi neturl.cmi -neturl.cmx: netencoding.cmx neturl.cmi -cgi.cmi: netstream.cmi -mimestring.cmi: netstream.cmi -netmappings.cmi: netconversion.cmi -netstream.cmi: netbuffer.cmi diff --git a/helm/DEVEL/pxp/netstring/depend.pkg b/helm/DEVEL/pxp/netstring/depend.pkg deleted file mode 100644 index e69de29bb..000000000 diff --git a/helm/DEVEL/pxp/netstring/doc/ABOUT-FINDLIB b/helm/DEVEL/pxp/netstring/doc/ABOUT-FINDLIB deleted file mode 100644 index d942e2786..000000000 --- a/helm/DEVEL/pxp/netstring/doc/ABOUT-FINDLIB +++ /dev/null @@ -1,52 +0,0 @@ -****************************************************************************** -ABOUT-FINDLIB - Package manager for O'Caml -****************************************************************************** - - -============================================================================== -Abstract -============================================================================== - -The findlib library provides a scheme to manage reusable software components -(packages), and includes tools that support this scheme. Packages are -collections of OCaml modules for which metainformation can be stored. The -packages are kept in the filesystem hierarchy, but with strict directory -structure. The library contains functions to look the directory up that stores -a package, to query metainformation about a package, and to retrieve dependency -information about multiple packages. There is also a tool that allows the user -to enter queries on the command-line. In order to simplify compilation and -linkage, there are new frontends of the various OCaml compilers that can -directly deal with packages. - -Together with the packages metainformation is stored. This includes a version -string, the archives the package consists of, and additional linker options. -Packages can also be dependent on other packages. There is a query which finds -out all predecessors of a list of packages and sorts them topologically. The -new compiler frontends do this implicitly. - -Metainformation can be conditional, i.e. depend on a set of predicates. This is -mainly used to be able to react on certain properties of the environment, such -as if the bytecode or the native compiler is invoked, if the application is -multi-threaded, and a few more. If the new compiler frontends are used, most -predicates are found out automatically. - -There is special support for scripts. A new directive, "#require", loads -packages into scripts. Of course, this works only with newly created toploops -which include the findlib library. - -============================================================================== -Where to get findlib -============================================================================== - -The manual of findlib is available online [1]. You can download findlib here -[2]. - - --------------------------- - -[1] see http://www.ocaml-programming.de/packages/documentation/findlib/ - -[2] see http://www.ocaml-programming.de/packages/findlib-0.3.1.tar.gz - - - diff --git a/helm/DEVEL/pxp/netstring/doc/ABOUT-FINDLIB.xml b/helm/DEVEL/pxp/netstring/doc/ABOUT-FINDLIB.xml deleted file mode 100644 index d1dc5b04e..000000000 --- a/helm/DEVEL/pxp/netstring/doc/ABOUT-FINDLIB.xml +++ /dev/null @@ -1,61 +0,0 @@ - - -%common; - -findlib"> -Findlib"> - -]> - - - - Abstract -

-The &f; library provides a scheme to manage reusable software -components (packages), and includes tools that support this -scheme. Packages are collections of OCaml modules for which -metainformation can be stored. The packages are kept in the filesystem -hierarchy, but with strict directory structure. The library contains -functions to look the directory up that stores a package, to query -metainformation about a package, and to retrieve dependency -information about multiple packages. There is also a tool that allows -the user to enter queries on the command-line. In order to simplify -compilation and linkage, there are new frontends of the various OCaml -compilers that can directly deal with packages. -

- -

-Together with the packages metainformation is stored. This includes a -version string, the archives the package consists of, and additional -linker options. Packages can also be dependent on other -packages. There is a query which finds out all predecessors of a list -of packages and sorts them topologically. The new compiler frontends -do this implicitly. -

- -

-Metainformation can be conditional, i.e. depend on a set of -predicates. This is mainly used to be able to react on certain -properties of the environment, such as if the bytecode or the native -compiler is invoked, if the application is multi-threaded, and a few -more. If the new compiler frontends are used, most predicates are -found out automatically. -

- -

-There is special support for scripts. A new directive, "#require", -loads packages into scripts. Of course, this works only with newly -created toploops which include the &f; library. -

- -
- - Where to get findlib -

-The manual of &f; is available online. -You can download &f; here. -

-
-
diff --git a/helm/DEVEL/pxp/netstring/doc/INSTALL b/helm/DEVEL/pxp/netstring/doc/INSTALL deleted file mode 100644 index cca39944b..000000000 --- a/helm/DEVEL/pxp/netstring/doc/INSTALL +++ /dev/null @@ -1,128 +0,0 @@ -****************************************************************************** -INSTALL - Netstring, string processing functions for the net -****************************************************************************** - - -============================================================================== -The "Netstring" package -============================================================================== - ------------------------------------------------------------------------------- -Prerequisites ------------------------------------------------------------------------------- - -Netstring does not need any other packages besides the O'Caml core. Netstring -needs at least O'Caml 3.00. The installation procedure defined in the Makefile -requires findlib [1] to work [2]. - ------------------------------------------------------------------------------- -Configuration ------------------------------------------------------------------------------- - -It is not necessary to configure "Netstring". - ------------------------------------------------------------------------------- -Compilation ------------------------------------------------------------------------------- - -The Makefile defines the following goals: - -- make all - compiles with the bytecode compiler and creates netstring.cma, - netstring_mt.cmo, netstring_top.cmo, netmappings_iso.cmo, and - netmappings_other.cmo - -- make opt - compiles with the native compiler and creates netstring.cmxa, - netstring_mt.cmx, netmappings_iso.cmx, and netmappings_other.cmx - -The archive netstring.cmx?a contains the functionality, and the two -single-module files netmappings_iso.cm[ox] and netmappings_other.cm[ox] add -configurations to the character set conversion module. These configurations are -optional: - -- Netmappings_iso: Conversion tables for the character sets ISO-8859-2, -3, - -4, -5, -6, -7, -8, -9, -10, 13, -14, and -15. - -- Netmappings_other: Conversion tables for the character sets WINDOWS-1250, - -1251, -1252, -1253, -1254, -1255, -1256, -1257, -1258; code pages 037, 424, - 437, 500, 737, 775, 850, 852, 855, 856, 857, 860, 861, 862, 863, 864, 865, - 866, 869, 874, 875, 1006, 1026; JIS-0201; KOI8R; Macintosh Roman encoding; - Adobe Standard Encoding, Symbol Encoding, and Zapf Dingbats Encodings. - -Even without these configuration files, the conversion module is able to handle -the encodings ISO-8859-1, US-ASCII, UTF-16, UTF-8, and the Java variant of -UTF-8. - -The module Netstring_mt must be linked into multi-threaded applications; -otherwise some mutexes remain uninitialized. - -The module Netstring_top loads several printers for abstract values (for -toploops). - ------------------------------------------------------------------------------- -Installation ------------------------------------------------------------------------------- - -The Makefile defines the following goals: - -- make install - installs the bytecode archive, the interface definitions, and if present, - the native archive in the default location of findlib - -- make install-cgi - Installs a pseudo package "cgi" which is compatible with the old cgi - package. This has the effect that software searching the "cgi" package will - find the netstring package instead. This is recommended. - -- make install-base64 - Installs a pseudo package "base64" which is compatible with the old base64 - package. This has the effect that software searching the "base64" package - will find the netstring package instead. This is recommended. - -- make uninstall - removes the package - -- make uninstall-cgi - removes the "cgi" compatibility package - -- make uninstall-base64 - removes the "base64" compatibility package - ------------------------------------------------------------------------------- -Linking netstring with findlib ------------------------------------------------------------------------------- - -The command - -ocamlfind ocamlc ... -package netstring ... -linkpkg ... - -links as much as possible code from netstring into your application: All -conversion tables; when -thread is specified, the initialization code for -multi-threaded programs; when a toploop is created, the code setting the value -printers. - -The following predicates reduce the amount of linked code: - -- netstring_only_iso: Only the conversion tables for the ISO-8859 series of - character sets are linked. - -- netstring_minimum: No additional conversion tables are linked; only - ISO-8859-1 and the UTF encodings work. - -For example, the command may look like - -ocamlfind ocamlc ... - -package netstring -predicates netstring_only_iso ... -linkpkg ... - -to link only the ISO-8859 conversion tables. - - --------------------------- - -[1] see http://www.ocaml-programming.de/packages/documentation/findlib/ - -[2] Findlib is a package manager, see the file ABOUT-FINDLIB. - - - diff --git a/helm/DEVEL/pxp/netstring/doc/INSTALL.xml b/helm/DEVEL/pxp/netstring/doc/INSTALL.xml deleted file mode 100644 index b5b53eddc..000000000 --- a/helm/DEVEL/pxp/netstring/doc/INSTALL.xml +++ /dev/null @@ -1,153 +0,0 @@ - - -%common; - -Netstring"> - -]> - - - The "Netstring" package - Prerequisites -

-&m; does not need any other packages besides the O'Caml core. &m; needs -at least O'Caml 3.00. The installation procedure defined in the Makefile -requires findlib to -workFindlib is a package manager, see the file -ABOUT-FINDLIB.. -

-
- - Configuration -

-It is not necessary to configure "Netstring". -

-
- - Compilation -

-The Makefile defines the following goals: -

-
    -
  • -

    make all

    -

    compiles with the bytecode compiler and creates netstring.cma, -netstring_mt.cmo, netstring_top.cmo, netmappings_iso.cmo, and -netmappings_other.cmo

    -
  • -
  • -

    make opt

    -

    compiles with the native compiler and creates netstring.cmxa, -netstring_mt.cmx, netmappings_iso.cmx, and netmappings_other.cmx

    -
  • -
- -

The archive netstring.cmx?a contains the functionality, and the two -single-module files netmappings_iso.cm[ox] and netmappings_other.cm[ox] add -configurations to the character set conversion module. These configurations are -optional:

- -
    -
  • Netmappings_iso: Conversion tables for the character sets -ISO-8859-2, -3, -4, -5, -6, -7, -8, -9, -10, 13, -14, and -15.

    -
  • -
  • Netmappings_other: Conversion tables for the character sets -WINDOWS-1250, -1251, -1252, -1253, -1254, -1255, -1256, -1257, -1258; -code pages 037, 424, 437, 500, 737, 775, 850, 852, 855, 856, 857, 860, 861, -862, 863, 864, 865, 866, 869, 874, 875, 1006, 1026; JIS-0201; KOI8R; Macintosh -Roman encoding; Adobe Standard Encoding, Symbol Encoding, and Zapf Dingbats -Encodings.

    -
  • -
- -

Even without these configuration files, the conversion module is able to -handle the encodings ISO-8859-1, US-ASCII, UTF-16, UTF-8, and the Java variant -of UTF-8.

- -

The module Netstring_mt must be linked into multi-threaded applications; -otherwise some mutexes remain uninitialized.

- -

The module Netstring_top loads several printers for abstract values (for -toploops).

- -
- - Installation -

-The Makefile defines the following goals:

-
    -
  • -

    make install

    -

    installs the bytecode archive, the interface definitions, and if -present, the native archive in the default location of findlib -

    -
  • - -
  • -

    make install-cgi

    -

    Installs a pseudo package "cgi" which is compatible with the old -cgi package. This has the effect that software searching the "cgi" package will -find the netstring package instead. This is recommended.

    -
  • - -
  • -

    make install-base64

    Installs a pseudo package "base64" -which is compatible with the old base64 package. This has the effect that -software searching the "base64" package will find the netstring package -instead. This is recommended.

    -
  • - -
  • -

    make uninstall

    -

    removes the package

    -
  • - -
  • -

    make uninstall-cgi

    -

    removes the "cgi" compatibility package

    -
  • - -
  • -

    make uninstall-base64

    -

    removes the "base64" compatibility package

    -
  • -
-
- - - - Linking netstring with findlib -

The command - -ocamlfind ocamlc ... -package netstring ... -linkpkg ... - -links as much as possible code from netstring into your application: All -conversion tables; when -thread is specified, the initialization code for -multi-threaded programs; when a toploop is created, the code setting the value -printers.

- -

The following predicates reduce the amount of linked code:

- -
    -
  • netstring_only_iso: Only the conversion tables for the ISO-8859 -series of character sets are linked.

    -
  • -
  • netstring_minimum: No additional conversion tables are linked; -only ISO-8859-1 and the UTF encodings work.

    -
  • -
- -

For example, the command may look like - - -ocamlfind ocamlc ... - -package netstring -predicates netstring_only_iso ... -linkpkg ... - - -to link only the ISO-8859 conversion tables.

-
- -
-
\ No newline at end of file diff --git a/helm/DEVEL/pxp/netstring/doc/Makefile b/helm/DEVEL/pxp/netstring/doc/Makefile deleted file mode 100644 index 7f8450be3..000000000 --- a/helm/DEVEL/pxp/netstring/doc/Makefile +++ /dev/null @@ -1,22 +0,0 @@ -.PHONY: all -all: README INSTALL ABOUT-FINDLIB - -README: README.xml common.xml config.xml - readme -text README.xml >README - -INSTALL: INSTALL.xml common.xml config.xml - readme -text INSTALL.xml >INSTALL - -ABOUT-FINDLIB: ABOUT-FINDLIB.xml common.xml config.xml - readme -text ABOUT-FINDLIB.xml >ABOUT-FINDLIB - -.PHONY: clean -clean: - -.PHONY: CLEAN -CLEAN: clean - -.PHONY: distclean -distclean: clean - rm -f *~ - diff --git a/helm/DEVEL/pxp/netstring/doc/README b/helm/DEVEL/pxp/netstring/doc/README deleted file mode 100644 index b590416be..000000000 --- a/helm/DEVEL/pxp/netstring/doc/README +++ /dev/null @@ -1,212 +0,0 @@ -****************************************************************************** -README - Netstring, string processing functions for the net -****************************************************************************** - - -============================================================================== -Abstract -============================================================================== - -Netstring is a collection of string processing functions that are useful in -conjunction with Internet messages and protocols. In particular, it contains -functions for the following purposes: - -- Parsing MIME messages - -- Several encoding/decoding functions (Base 64, Quoted Printable, Q, - URL-encoding) - -- A new implementation of the CGI interface that allows users to upload files - -- A simple HTML parser - -- URL parsing, printing and processing - -- Conversion between character sets - -============================================================================== -Download -============================================================================== - -You can download Netstring as gzip'ed tarball [1]. - -============================================================================== -Documentation -============================================================================== - -Sorry, there is no manual. The mli files describe each function in detail. -Furthermore, the following additional information may be useful. - ------------------------------------------------------------------------------- -New CGI implementation ------------------------------------------------------------------------------- - -For a long time, the CGI implementation by Jean-Christophe Filliatre has been -the only freely available module that implemented the CGI interface (it also -based on code by Daniel de Rauglaudre). It worked well, but it did not support -file uploads because this requires a parser for MIME messages. - -The main goal of Netstring is to realize such uploads, and because of this it -contains an almost complete parser for MIME messages. - -The new CGI implementation provides the same functions than the old one, and -some extensions. If you call Cgi.parse_args(), you get the CGI parameters as -before, but as already explained this works also if the parameters are -encaspulated as MIME message. In the HTML code, you can select the MIME format -by using - -
-... -
- - -- this "enctype" attribute forces the browser to send the form parameters as -multipart MIME message (Note: You can neither send the parameters of a -conventional hyperlink as MIME message nor the form parameters if the "method" -is "get"). In many browsers only this particular encoding enables the file -upload elements, you cannot perform file uploads with other encodings. - -As MIME messages can transport MIME types, filename, and other additional -properties, it is also possible to get these using the enhanced interface. -After calling - -Cgi.parse_arguments config - -you can get all available information about a certain parameter by invoking - -let param = Cgi.argument "name" - -- where "param" has the type "argument". There are several accessor functions -to extract the various aspects of arguments (name, filename, value by string, -value by temporary file, MIME type, MIME header) from "argument" values. - ------------------------------------------------------------------------------- -Base64, and other encodings ------------------------------------------------------------------------------- - -Netstring is also the successor of the Base64 package. It provides a Base64 -compatible interface, and an enhanced API. The latter is contained in the -Netencoding module which also offers implementations of the "quoted printable", -"Q", and "URL" encodings. Please see netencoding.mli for details. - ------------------------------------------------------------------------------- -The MIME scanner functions ------------------------------------------------------------------------------- - -In the Mimestring module you can find several functions scanning parts of MIME -messages. These functions already cover most aspects of MIME messages: Scanning -of headers, analysis of structured header entries, and scanning of multipart -bodies. Of course, a full-featured MIME scanner would require some more -functions, especially concrete parsers for frequent structures (mail addresses -or date strings). - -Please see the file mimestring.mli for details. - ------------------------------------------------------------------------------- -The HTML parser ------------------------------------------------------------------------------- - -The HTML parser should be able to read every HTML file; whether it is correct -or not. The parser tries to recover from parsing errors as much as possible. - -The parser returns the HTML term as conventional recursive value (i.e. no -object-oriented design). - -The parser depends a bit on knowledge about the HTML version; mainly because it -needs to know the tags that are always empty. It may be necessary that you must -adjust this configuration before the parser works well enough for your purpose. - -Please see the Nethtml module for details. - ------------------------------------------------------------------------------- -The abstract data type URL ------------------------------------------------------------------------------- - -The module Neturl contains support for URL parsing and processing. The -implementation follows strictly the standards RFC 1738 and RFC 1808. URLs can -be parsed, and several accessor functions allow the user to get components of -parsed URLs, or to change components. Modifying URLs is safe; it is impossible -to create a URL that does not have a valid string representation. - -Both absolute and relative URLs are supported. It is possible to apply a -relative URL to a base URL in order to get the corresponding absolute URL. - ------------------------------------------------------------------------------- -Conversion between character sets and encodings ------------------------------------------------------------------------------- - -The module Netconversion converts strings from one characters set to another. -It is Unicode-based, and there are conversion tables for more than 50 -encodings. - -============================================================================== -Author, Copying -============================================================================== - -Netstring has been written by Gerd Stolpmann [2]. You may copy it as you like, -you may use it even for commercial purposes as long as the license conditions -are respected, see the file LICENSE coming with the distribution. It allows -almost everything. - -============================================================================== -History -============================================================================== - -- Changed in 0.9.3: Fixed a bug in the "install" rule of the Makefile. - -- Changed in 0.9.2: New format for the conversion tables which are now much - smaller. - -- Changed in 0.9.1: Updated the Makefile such that (native-code) compilation - of netmappings.ml becomes possible. - -- Changed in 0.9: Extended Mimestring module: It can now process RFC-2047 - messages. - New Netconversion module which converts strings between character encodings. - -- Changed in 0.8.1: Added the component url_accepts_8bits to - Neturl.url_syntax. This helps processing URLs which intentionally contain - bytes >= 0x80. - Fixed a bug: Every URL containing a 'j' was malformed! - -- Changed in 0.8: Added the module Neturl which provides the abstract data - types of URLs. - The whole package is now thread-safe. - Added printers for the various opaque data types. - Added labels to function arguments where appropriate. The following - functions changed their signatures significantly: Cgi.mk_memory_arg, - Cgi.mk_file_arg. - -- Changed in 0.7: Added workarounds for frequent browser bugs. Some functions - take now an additional argument specifying which workarounds are enabled. - -- Changed in 0.6.1: Updated URLs in documentation. - -- Changed in 0.6: The file upload has been re-implemented to support large - files; the file is now read block by block and the blocks can be collected - either in memory or in a temporary file. - Furthermore, the CGI API has been revised. There is now an opaque data type - "argument" that hides all implementation details and that is extensible (if - necessary, it is possible to add features without breaking the interface - again). - The CGI argument parser can be configured; currently it is possible to limit - the size of uploaded data, to control by which method arguments are - processed, and to set up where temporary files are created. - The other parts of the package that have nothing to do with CGI remain - unchanged. - -- Changed in 0.5.1: A mistake in the documentation has been corrected. - -- Initial version 0.5: The Netstring package wants to be the successor of the - Base64-0.2 and the Cgi-0.3 packages. The sum of both numbers is 0.5, and - because of this, the first version number is 0.5. - - --------------------------- - -[1] see http://www.ocaml-programming.de/packages/netstring-0.9.2.tar.gz - -[2] see mailto:gerd@gerd-stolpmann.de - - - diff --git a/helm/DEVEL/pxp/netstring/doc/README.xml b/helm/DEVEL/pxp/netstring/doc/README.xml deleted file mode 100644 index bbf473e99..000000000 --- a/helm/DEVEL/pxp/netstring/doc/README.xml +++ /dev/null @@ -1,244 +0,0 @@ - - -%common; - - -up'> - - -%config; - -]> - - - - Abstract -

-Netstring is a collection of string processing functions that are -useful in conjunction with Internet messages and protocols. In particular, -it contains functions for the following purposes:

- -
    -
  • Parsing MIME messages

    -
  • -
  • Several encoding/decoding functions (Base 64, Quoted Printable, Q, URL-encoding)

    -
  • -
  • A new implementation of the CGI interface that allows users to upload files

    -
  • -
  • A simple HTML parser

    -
  • -
  • URL parsing, printing and processing

    -
  • -
  • Conversion between character sets

    -
  • -
- -
- - - Download -

-You can download Netstring as gzip'ed tarball. -

- -
- - - Documentation -

-Sorry, there is no manual. The mli files describe each function in -detail. Furthermore, the following additional information may be useful.

- - - New CGI implementation - -

For a long time, the CGI implementation by Jean-Christophe Filliatre -has been the only freely available module that implemented the CGI interface -(it also based on code by Daniel de Rauglaudre). It worked well, but it did not -support file uploads because this requires a parser for MIME messages.

-

The main goal of Netstring is to realize such uploads, and because of -this it contains an almost complete parser for MIME messages.

-

The new CGI implementation provides the same functions than the old -one, and some extensions. If you call Cgi.parse_args(), you get the CGI -parameters as before, but as already explained this works also if the -parameters are encaspulated as MIME message. In the HTML code, you can select -the MIME format by using - -... - -]]> - -- this "enctype" attribute forces the browser to send the form parameters -as multipart MIME message (Note: You can neither send the parameters of a -conventional hyperlink as MIME message nor the form parameters if the -"method" is "get"). In many browsers only this particular encoding enables -the file upload elements, you cannot perform file uploads with other encodings. -

- -

As MIME messages can transport MIME types, filename, and other -additional properties, it is also possible to get these using the enhanced -interface. After calling - -you can get all available information about a certain parameter by invoking - -- where "param" has the type "argument". There are several accessor functions -to extract the various aspects of arguments (name, filename, value by string, -value by temporary file, MIME type, MIME header) from "argument" values. -

- -
- - - - Base64, and other encodings - -

Netstring is also the successor of the Base64 package. It provides a -Base64 compatible interface, and an enhanced API. The latter is contained in -the Netencoding module which also offers implementations of the "quoted -printable", "Q", and "URL" encodings. Please see netencoding.mli for -details.

- -
- - - - The MIME scanner functions - -

In the Mimestring module you can find several functions scanning parts -of MIME messages. These functions already cover most aspects of MIME messages: -Scanning of headers, analysis of structured header entries, and scanning of -multipart bodies. Of course, a full-featured MIME scanner would require some -more functions, especially concrete parsers for frequent structures -(mail addresses or date strings). -

-

Please see the file mimestring.mli for details.

-
- - - - The HTML parser - -

The HTML parser should be able to read every HTML file; whether it is -correct or not. The parser tries to recover from parsing errors as much as -possible. -

-

The parser returns the HTML term as conventional recursive value -(i.e. no object-oriented design).

-

The parser depends a bit on knowledge about the HTML version; mainly -because it needs to know the tags that are always empty. It may be necessary -that you must adjust this configuration before the parser works well enough for -your purpose. -

-

Please see the Nethtml module for details.

-
- - - The abstract data type URL -

The module Neturl contains support for URL parsing and processing. -The implementation follows strictly the standards RFC 1738 and RFC 1808. -URLs can be parsed, and several accessor functions allow the user to -get components of parsed URLs, or to change components. Modifying URLs -is safe; it is impossible to create a URL that does not have a valid -string representation.

- -

Both absolute and relative URLs are supported. It is possible to -apply a relative URL to a base URL in order to get the corresponding -absolute URL.

-
- - - Conversion between character sets and encodings -

The module Netconversion converts strings from one characters set -to another. It is Unicode-based, and there are conversion tables for more than -50 encodings.

-
- -
- - - Author, Copying -

-Netstring has been written by &person.gps;. You may copy it as you like, -you may use it even for commercial purposes as long as the license conditions -are respected, see the file LICENSE coming with the distribution. It allows -almost everything. -

-
- - - History - -
    -
  • Changed in 0.9.3: Fixed a bug in the "install" rule of -the Makefile.

    -
  • -
  • Changed in 0.9.2: New format for the conversion tables -which are now much smaller.

    -
  • -
  • Changed in 0.9.1: Updated the Makefile such that -(native-code) compilation of netmappings.ml becomes possible. -

    -
  • -
  • Changed in 0.9: Extended Mimestring module: It can -now process RFC-2047 messages.

    -

    New Netconversion module which converts strings between character -encodings.

    -
  • -
  • Changed in 0.8.1: Added the component -url_accepts_8bits to Neturl.url_syntax. This helps processing URLs which -intentionally contain bytes >= 0x80.

    -

    Fixed a bug: Every URL containing a 'j' was malformed!

    -
  • -
  • Changed in 0.8: Added the module Neturl which -provides the abstract data types of URLs.

    -

    The whole package is now thread-safe.

    -

    Added printers for the various opaque data types.

    -

    Added labels to function arguments where appropriate. The -following functions changed their signatures significantly: -Cgi.mk_memory_arg, Cgi.mk_file_arg.

    -
  • -
  • Changed in 0.7: Added workarounds for frequent -browser bugs. Some functions take now an additional argument -specifying which workarounds are enabled.

    -
  • -
  • Changed in 0.6.1: Updated URLs in documentation.

    -
  • - -
  • Changed in 0.6: The file upload has been re-implemented -to support large files; the file is now read block by block and the blocks can -be collected either in memory or in a temporary file.
    -Furthermore, the CGI API has been revised. There is now an opaque data type -"argument" that hides all implementation details and that is extensible (if -necessary, it is possible to add features without breaking the interface -again).
    -The CGI argument parser can be configured; currently it is possible to -limit the size of uploaded data, to control by which method arguments are -processed, and to set up where temporary files are created.
    -The other parts of the package that have nothing to do with CGI remain -unchanged. -

    -
  • - -
  • Changed in 0.5.1: A mistake in the documentation has -been corrected.

    -
  • - -
  • Initial version 0.5: -The Netstring package wants to be the successor of the Base64-0.2 and -the Cgi-0.3 packages. The sum of both numbers is 0.5, and because of this, -the first version number is 0.5. -

    -
  • -
-
- -
- diff --git a/helm/DEVEL/pxp/netstring/mimestring.ml b/helm/DEVEL/pxp/netstring/mimestring.ml deleted file mode 100644 index 8fc4bfcbe..000000000 --- a/helm/DEVEL/pxp/netstring/mimestring.ml +++ /dev/null @@ -1,1035 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -module Str = Netstring_str;; - -let cr_or_lf_re = Str.regexp "[\013\n]";; - -let trim_right_spaces_re = - Str.regexp "[ \t]+$";; - -let trim_left_spaces_re = - Str.regexp "^[ \t]+";; - -let header_re = - Str.regexp "\\([^ \t\r\n:]+\\):\\([ \t]*.*\n\\([ \t].*\n\\)*\\)";; - -let empty_line_re = - Str.regexp "\013?\n";; - -let end_of_header_re = - Str.regexp "\n\013?\n";; - - -let scan_header ?(unfold=true) parstr ~start_pos:i0 ~end_pos:i1 = - let rec parse_header i l = - match Str.string_partial_match header_re parstr i with - Some r -> - let i' = Str.match_end r in - if i' > i1 then - failwith "Mimestring.scan_header"; - let name = String.lowercase(Str.matched_group r 1 parstr) in - let value_with_crlf = - Str.matched_group r 2 parstr in - let value = - if unfold then begin - let value_with_rspaces = - Str.global_replace cr_or_lf_re "" value_with_crlf in - let value_with_lspaces = - Str.global_replace trim_right_spaces_re "" value_with_rspaces in - Str.global_replace trim_left_spaces_re "" value_with_lspaces - end - else value_with_crlf - in - parse_header i' ( (name,value) :: l) - | None -> - (* The header must end with an empty line *) - begin match Str.string_partial_match empty_line_re parstr i with - Some r' -> - List.rev l, Str.match_end r' - | None -> - failwith "Mimestring.scan_header" - end - in - parse_header i0 [] -;; - -type s_token = - Atom of string - | EncodedWord of (string * string * string) - | QString of string - | Control of char - | Special of char - | DomainLiteral of string - | Comment - | End -;; - -type s_option = - No_backslash_escaping - | Return_comments - | Recognize_encoded_words -;; - -type s_extended_token = - { token : s_token; - token_pos : int; - token_line : int; - token_linepos : int; (* Position of the beginning of the line *) - token_len : int; - mutable token_sep : bool; (* separates adjacent encoded words *) - } -;; - -let get_token et = et.token;; -let get_pos et = et.token_pos;; -let get_line et = et.token_line;; -let get_column et = et.token_pos - et.token_linepos;; -let get_length et = et.token_len;; -let separates_adjacent_encoded_words et = et.token_sep;; - -let get_decoded_word et = - match et.token with - Atom s -> s - | QString s -> s - | Control c -> String.make 1 c - | Special c -> String.make 1 c - | DomainLiteral s -> s - | Comment -> "" - | EncodedWord (_, encoding, content) -> - ( match encoding with - ("Q"|"q") -> - Netencoding.Q.decode content - | ("B"|"b") -> - Netencoding.Base64.decode - ~url_variant:false - ~accept_spaces:false - content - | _ -> failwith "get_decoded_word" - ) - | End -> - failwith "get_decoded_word" -;; - -let get_charset et = - match et.token with - EncodedWord (charset, _, _) -> charset - | End -> failwith "get_charset" - | _ -> "US-ASCII" -;; - -type scanner_spec = - { (* What the user specifies: *) - scanner_specials : char list; - scanner_options : s_option list; - (* Derived from that: *) - mutable opt_no_backslash_escaping : bool; - mutable opt_return_comments : bool; - mutable opt_recognize_encoded_words : bool; - - mutable is_special : bool array; - mutable space_is_special : bool; - } -;; - -type scanner_target = - { scanned_string : string; - mutable scanner_pos : int; - mutable scanner_line : int; - mutable scanner_linepos : int; - (* Position of the beginning of the line *) - mutable scanned_tokens : s_extended_token Queue.t; - (* A queue of already scanned tokens in order to look ahead *) - mutable last_token : s_token; - (* The last returned token. It is only important whether it is - * EncodedWord or not. - *) - } -;; - -type mime_scanner = scanner_spec * scanner_target -;; - -let get_pos_of_scanner (spec, target) = - if spec.opt_recognize_encoded_words then - failwith "get_pos_of_scanner" - else - target.scanner_pos -;; - -let get_line_of_scanner (spec, target) = - if spec.opt_recognize_encoded_words then - failwith "get_line_of_scanner" - else - target.scanner_line -;; - -let get_column_of_scanner (spec, target) = - if spec.opt_recognize_encoded_words then - failwith "get_column_of_scanner" - else - target.scanner_pos - target.scanner_linepos -;; - -let create_mime_scanner ~specials ~scan_options = - let is_spcl = Array.create 256 false in - List.iter - (fun c -> is_spcl.( Char.code c ) <- true) - specials; - let spec = - { scanner_specials = specials; - scanner_options = scan_options; - opt_no_backslash_escaping = - List.mem No_backslash_escaping scan_options; - opt_return_comments = - List.mem Return_comments scan_options; - opt_recognize_encoded_words = - List.mem Recognize_encoded_words scan_options; - is_special = is_spcl; - space_is_special = is_spcl.(32); - } - in - (* Grab the remaining arguments: *) - fun ?(pos=0) ?(line=1) ?(column=0) s -> - let target = - { scanned_string = s; - scanner_pos = pos; - scanner_line = line; - scanner_linepos = pos - column; - scanned_tokens = Queue.create(); - last_token = Comment; (* Must not be initialized with EncodedWord *) - } - in - spec, target -;; - - -let encoded_word_re = - Str.regexp "=\\?\\([^?]+\\)\\?\\([^?]+\\)\\?\\([^?]+\\)\\?=";; - -let scan_next_token ((spec,target) as scn) = - let mk_pair t len = - { token = t; - token_pos = target.scanner_pos; - token_line = target.scanner_line; - token_linepos = target.scanner_linepos; - token_len = len; - token_sep = false; - }, - t - in - - (* Note: mk_pair creates a new token pair, and it assumes that - * target.scanner_pos (and also scanner_line and scanner_linepos) - * still contain the position of the beginning of the token. - *) - - let s = target.scanned_string in - let l = String.length s in - let rec scan i = - if i < l then begin - let c = s.[i] in - if spec.is_special.( Char.code c ) then begin - let pair = mk_pair (Special c) 1 in - target.scanner_pos <- target.scanner_pos + 1; - (match c with - '\n' -> - target.scanner_line <- target.scanner_line + 1; - target.scanner_linepos <- target.scanner_pos; - | _ -> () - ); - pair - end - else - match c with - '"' -> - (* Quoted string: *) - scan_qstring (i+1) (i+1) 0 - | '(' -> - (* Comment: *) - let i', line, linepos = - scan_comment (i+1) 0 target.scanner_line target.scanner_linepos - in - let advance() = - target.scanner_pos <- i'; - target.scanner_line <- line; - target.scanner_linepos <- linepos - in - if spec.opt_return_comments then begin - let pair = mk_pair Comment (i' - i) in - advance(); - pair - end - else - if spec.space_is_special then begin - let pair = mk_pair (Special ' ') (i' - i) in - advance(); - pair - end - else begin - advance(); - scan i' - end - | (' '|'\t'|'\r') -> - (* Ignore whitespace by default: *) - target.scanner_pos <- target.scanner_pos + 1; - scan (i+1) - | '\n' -> - (* Ignore whitespace by default: *) - target.scanner_pos <- target.scanner_pos + 1; - target.scanner_line <- target.scanner_line + 1; - target.scanner_linepos <- target.scanner_pos; - scan (i+1) - | ('\000'..'\031'|'\127'..'\255') -> - let pair = mk_pair (Control c) 1 in - target.scanner_pos <- target.scanner_pos + 1; - pair - | '[' -> - (* Domain literal: *) - scan_dliteral (i+1) (i+1) 0 - | _ -> - scan_atom i i - end - else - mk_pair End 0 - - and scan_atom i0 i = - let return_atom() = - let astring = String.sub s i0 (i-i0) in - let r = - if spec.opt_recognize_encoded_words then - Str.string_match ~groups:4 encoded_word_re astring 0 - else - None - in - match r with - None -> - (* An atom contains never a linefeed character, so we can ignore - * scanner_line here. - *) - let pair = mk_pair (Atom astring) (i-i0) in - target.scanner_pos <- i; - pair - | Some mr -> - (* Found an encoded word. *) - let charset = Str.matched_group mr 1 astring in - let encoding = Str.matched_group mr 2 astring in - let content = Str.matched_group mr 3 astring in - let t = EncodedWord(String.uppercase charset, - String.uppercase encoding, - content) in - let pair = mk_pair t (i-i0) in - target.scanner_pos <- i; - pair - in - - if i < l then - let c = s.[i] in - match c with - ('\000'..'\031'|'\127'..'\255'|'"'|'('|'['|' '|'\t'|'\r'|'\n') -> - return_atom() - | _ -> - if spec.is_special.( Char.code c ) then - return_atom() - else - scan_atom i0 (i+1) - else - return_atom() - - and scan_qstring i0 i n = - if i < l then - let c = s.[i] in - match c with - '"' -> - (* Regular end of the quoted string: *) - let content, line, linepos = copy_qstring i0 (i-1) n in - let pair = mk_pair (QString content) (i-i0+2) in - target.scanner_pos <- i+1; - target.scanner_line <- line; - target.scanner_linepos <- linepos; - pair - | '\\' when not spec.opt_no_backslash_escaping -> - scan_qstring i0 (i+2) (n+1) - | _ -> - scan_qstring i0 (i+1) (n+1) - else - (* Missing right double quote *) - let content, line, linepos = copy_qstring i0 (l-1) n in - let pair = mk_pair (QString content) (l-i0+1) in - target.scanner_pos <- l; - target.scanner_line <- line; - target.scanner_linepos <- linepos; - pair - - and copy_qstring i0 i1 n = - (* Used for quoted strings and for domain literals *) - let r = String.create n in - let k = ref 0 in - let line = ref target.scanner_line in - let linepos = ref target.scanner_linepos in - for i = i0 to i1 do - let c = s.[i] in - match c with - '\\' when i < i1 && not spec.opt_no_backslash_escaping -> () - | '\n' -> - line := !line + 1; - linepos := i+1; - r.[ !k ] <- c; - incr k - | _ -> - r.[ !k ] <- c; - incr k - done; - assert (!k = n); - r, !line, !linepos - - and scan_dliteral i0 i n = - if i < l then - let c = s.[i] in - match c with - ']' -> - (* Regular end of the domain literal: *) - let content, line, linepos = copy_qstring i0 (i-1) n in - let pair = mk_pair (DomainLiteral content) (i-i0+2) in - target.scanner_pos <- i+1; - target.scanner_line <- line; - target.scanner_linepos <- linepos; - pair - | '\\' when not spec.opt_no_backslash_escaping -> - scan_dliteral i0 (i+2) (n+1) - | _ -> - (* Note: '[' is not allowed by RFC 822; we treat it here as - * a regular character (questionable) - *) - scan_dliteral i0 (i+1) (n+1) - else - (* Missing right bracket *) - let content, line, linepos = copy_qstring i0 (l-1) n in - let pair = mk_pair (DomainLiteral content) (l-i0+1) in - target.scanner_pos <- l; - target.scanner_line <- line; - target.scanner_linepos <- linepos; - pair - - - and scan_comment i level line linepos = - if i < l then - let c = s.[i] in - match c with - ')' -> - (i+1), line, linepos - | '(' -> - (* nested comment *) - let i', line', linepos' = - scan_comment (i+1) (level+1) line linepos - in - scan_comment i' level line' linepos' - | '\\' when not spec.opt_no_backslash_escaping -> - if (i+1) < l && s.[i+1] = '\n' then - scan_comment (i+2) level (line+1) (i+2) - else - scan_comment (i+2) level line linepos - | '\n' -> - scan_comment (i+1) level (line+1) (i+1) - | _ -> - scan_comment (i+1) level line linepos - else - (* Missing closing ')' *) - i, line, linepos - in - - scan target.scanner_pos -;; - - -let scan_token ((spec,target) as scn) = - (* This function handles token queueing in order to recognize white space - * that separates adjacent encoded words. - *) - - let rec collect_whitespace () = - (* Scans whitespace tokens and returns them as: - * (ws_list, other_tok) if there is some other_tok following the - * list (other_tok = End is possible) - *) - let (et, t) as pair = scan_next_token scn in - ( match t with - (Special ' '|Special '\t'|Special '\n'|Special '\r') -> - let ws_list, tok = collect_whitespace() in - pair :: ws_list, tok - | _ -> - [], pair - ) - in - - try - (* Is there an already scanned token in the queue? *) - let et = Queue.take target.scanned_tokens in - let t = et.token in - target.last_token <- t; - et, et.token - with - Queue.Empty -> - (* If not: inspect the last token. If that token is an EncodedWord, - * the next tokens are scanned in advance to determine if there - * are spaces separating two EncodedWords. These tokens are put - * into the queue such that it is avoided that they are scanned - * twice. (The sole purpose of the queue.) - *) - match target.last_token with - EncodedWord(_,_,_) as ew -> - let ws_list, tok = collect_whitespace() in - (* If tok is an EncodedWord, too, the tokens in ws_list must - * be flagged as separating two adjacent encoded words. - *) - ( match tok with - _, EncodedWord(_,_,_) -> - List.iter - (fun (et,t) -> - et.token_sep <- true) - ws_list - | _ -> - () - ); - (* Anyway, queue the read tokens but the first up *) - ( match ws_list with - [] -> - (* Nothing to queue *) - let et, t = tok in - target.last_token <- t; - tok - | (et,t) as pair :: ws_list' -> - List.iter - (fun (et',_) -> - Queue.add et' target.scanned_tokens) - ws_list'; - ( match tok with - | _, End -> - () - | (et',_) -> - Queue.add et' target.scanned_tokens - ); - (* Return the first scanned token *) - target.last_token <- t; - pair - ) - | _ -> - (* Regular case: Scan one token; do not queue it up *) - let (et, t) as pair = scan_next_token scn in - target.last_token <- t; - pair -;; - - -let scan_token_list scn = - let rec collect() = - match scan_token scn with - _, End -> - [] - | pair -> - pair :: collect() - in - collect() -;; - - -let scan_structured_value s specials options = - let rec collect scn = - match scan_token scn with - _, End -> - [] - | _, t -> - t :: collect scn - in - let scn = create_mime_scanner specials options s in - collect scn -;; - - -let specials_rfc822 = - [ '<'; '>'; '@'; ','; ';'; ':'; '\\'; '.' ];; - - -let specials_rfc2045 = - [ '<'; '>'; '@'; ','; ';'; ':'; '\\'; '/' ];; - - -let scan_encoded_text_value s = - let specials = [ ' '; '\t'; '\r'; '\n'; '('; '['; '"' ] in - let options = [ Recognize_encoded_words ] in - let scn = create_mime_scanner specials options s in - - let rec collect () = - match scan_token scn with - _, End -> - [] - | et, _ when separates_adjacent_encoded_words et -> - collect() - | et, (Special _|Atom _|EncodedWord(_,_,_)) -> - et :: collect () - | _, _ -> - assert false - in - collect() -;; - - -let scan_value_with_parameters s options = - let rec parse_params tl = - match tl with - Atom n :: Special '=' :: Atom v :: tl' -> - (n,v) :: parse_rest tl' - | Atom n :: Special '=' :: QString v :: tl' -> - (n,v) :: parse_rest tl' - | _ -> - failwith "Mimestring.scan_value_with_parameters" - and parse_rest tl = - match tl with - [] -> [] - | Special ';' :: tl' -> - parse_params tl' - | _ -> - failwith "Mimestring.scan_value_with_parameters" - in - - (* Note: Even if not used here, the comma is a very common separator - * and should be recognized as being special. You will get a - * failure if there is a comma in the scanned string. - *) - let tl = scan_structured_value s [ ';'; '='; ',' ] options in - match tl with - [ Atom n ] -> n, [] - | [ QString n ] -> n, [] - | Atom n :: Special ';' :: tl' -> - n, parse_params tl' - | QString n :: Special ';' :: tl' -> - n, parse_params tl' - | _ -> - failwith "Mimestring.scan_value_with_parameters" -;; - - -let scan_mime_type s options = - let n, params = scan_value_with_parameters s options in - (String.lowercase n), - (List.map (fun (n,v) -> (String.lowercase n, v)) params) -;; - - -let lf_re = Str.regexp "[\n]";; - -let scan_multipart_body s ~start_pos:i0 ~end_pos:i1 ~boundary = - let l_s = String.length s in - if i0 < 0 or i1 < 0 or i0 > l_s or i1 >l_s then - invalid_arg "Mimestring.scan_multipart_body"; - - (* First compile the regexps scanning for 'boundary': *) - let boundary1_re = - Str.regexp ("\n--" ^ Str.quote boundary) in - let boundary2_re = - Str.regexp ("--" ^ Str.quote boundary) in - - let rec parse i = - (* i: Beginning of the current part (position directly after the - * boundary line - *) - (* Search for next boundary at position i *) - let i' = - try min (fst (Str.search_forward boundary1_re s i) + 1) i1 - with - Not_found -> i1 - in - (* i': Either the position of the first '-' of the boundary line, - * or i1 if no boundary has been found - *) - if i' >= i1 then - [] (* Ignore everything after the last boundary *) - else - let i'' = - try min (fst (Str.search_forward lf_re s i') + 1) i1 - with - Not_found -> i1 - in - (* i'': The position after the boundary line *) -(* - print_int i; print_newline(); - print_int i'; print_newline(); - print_int i''; print_newline(); - flush stdout; -*) - let header, k = scan_header s i i' in - (* header: the header of the part - * k: beginning of the body - *) - - let value = - (* We know that i'-1 is a linefeed character. i'-2 should be a CR - * character. Both characters are not part of the value. - *) - if i' >= 2 then - match s.[i'-2] with - '\013' -> String.sub s k (i'-2-k) - | _ -> String.sub s k (i'-1-k) - else - String.sub s k (i'-1-k) - in - - let pair = - (header, value) in - - if i'' >= i1 - then - [ pair ] - else - pair :: parse i'' - in - - (* Find the first boundary. This is a special case, because it may be - * right at the beginning of the string (no preceding CRLF) - *) - - let i_bnd = - if Str.string_partial_match boundary2_re s i0 <> None then - i0 - else - try min (fst (Str.search_forward boundary1_re s i0)) i1 - with - Not_found -> i1 - in - - if i_bnd >= i1 then - [] - else - let i_bnd' = - try min (fst (Str.search_forward lf_re s (i_bnd + 1)) + 1) i1 - with - Not_found -> i1 - in - if i_bnd' >= i1 then - [] - else - parse i_bnd' -;; - - -let scan_multipart_body_and_decode s ~start_pos:i0 ~end_pos:i1 ~boundary = - let parts = scan_multipart_body s i0 i1 boundary in - List.map - (fun (params, value) -> - let encoding = - try List.assoc "content-transfer-encoding" params - with Not_found -> "7bit" - in - - (* NOTE: In the case of "base64" and "quoted-printable", the allocation - * of the string "value" could be avoided. - *) - - let value' = - match encoding with - ("7bit"|"8bit"|"binary") -> value - | "base64" -> - Netencoding.Base64.decode_substring - value 0 (String.length value) false true - | "quoted-printable" -> - Netencoding.QuotedPrintable.decode_substring - value 0 (String.length value) - | _ -> - failwith "Mimestring.scan_multipart_body_and_decode: Unknown content-transfer-encoding" - in - (params, value') - ) - parts -;; - - -let scan_multipart_body_from_netstream s ~boundary ~create ~add ~stop = - - (* The block size of s must be at least the length of the boundary + 3. - * Otherwise it is not guaranteed that the boundary is always recognized. - *) - if Netstream.block_size s < String.length boundary + 3 then - invalid_arg "Mimestring.scan_multipart_body_from_netstream"; - - (* First compile the regexps scanning for 'boundary': *) - let boundary1_re = - Str.regexp ("\n--" ^ Str.quote boundary) in - let boundary2_re = - Str.regexp ("--" ^ Str.quote boundary) in - - (* Subtask 1: Search the end of the MIME header: CR LF CR LF - * (or LF LF). Enlarge the window until the complete header - * is covered by the window. - *) - let rec search_end_of_header k = - (* Search the end of the header beginning at position k of the - * current window. - * Return the position of the first character of the body. - *) - try - (* Search for LF CR? LF: *) - let i, r = Str.search_forward - end_of_header_re - (Netbuffer.unsafe_buffer (Netstream.window s)) - k - in - (* If match_end <= window_length, the search was successful. - * Otherwise, we searched in the uninitialized region of the - * buffer. - *) - if Str.match_end r <= Netstream.window_length s then - Str.match_end r - else - raise Not_found - with - Not_found -> - (* If the end of the stream is reached, the end of the header - * is missing: Error. - * Otherwise, we try to read another block, and continue. - *) - if Netstream.at_eos s then - failwith "Mimestring.scan_multipart_body_from_netstream: Unexpected end of stream"; - let w0 = Netstream.window_length s in - Netstream.want_another_block s; - search_end_of_header (max (w0 - 2) 0) - in - - (* Subtask 2: Search the first boundary line. *) - let rec search_first_boundary() = - (* Search boundary per regexp; return the position of the character - * immediately following the boundary (on the same line), or - * raise Not_found. - *) - try - (* Search boundary per regexp: *) - let i, r = Str.search_forward - boundary1_re - (Netbuffer.unsafe_buffer (Netstream.window s)) - 0 - in - (* If match_end <= window_length, the search was successful. - * Otherwise, we searched in the uninitialized region of the - * buffer. - *) - if Str.match_end r <= Netstream.window_length s then begin - Str.match_end r - end - else raise Not_found - with - Not_found -> - if Netstream.at_eos s then raise Not_found; - (* The regexp did not match: Move the window by one block. - *) - let n = - min - (Netstream.window_length s) - (Netstream.block_size s) - in - Netstream.move s n; - search_first_boundary() - in - - (* Subtask 3: Search the next boundary line. Invoke 'add' for every - * read chunk - *) - let rec search_next_boundary p = - (* Returns the position directly after the boundary on the same line *) - try - (* Search boundary per regexp: *) - let i,r = Str.search_forward - boundary1_re - (Netbuffer.unsafe_buffer (Netstream.window s)) - 0 - in - (* If match_end <= window_length, the search was successful. - * Otherwise, we searched in the uninitialized region of the - * buffer. - *) - if Str.match_end r <= Netstream.window_length s then begin - (* Add the last chunk of the part. *) - let n = - (* i is a LF. i - 1 should be CR. Ignore these characters. *) - if i >= 1 then - match (Netbuffer.unsafe_buffer (Netstream.window s)).[ i - 1 ] with - '\013' -> i - 1 - | _ -> i - else - i - in - (* Printf.printf "add n=%d\n" n; *) - add p s 0 n; - Str.match_end r - end - else raise Not_found - with - Not_found -> - if Netstream.at_eos s then - failwith "Mimestring.scan_multipart_body_from_netstream: next MIME boundary not found"; - (* The regexp did not match: Add the first block of the window; - * and move the window. - *) - let n = - min - (Netstream.window_length s) - (Netstream.block_size s) - in - (* Printf.printf "add n=%d\n" n; *) - add p s 0 n; - Netstream.move s n; - search_next_boundary p - in - - (* Subtask 4: Search the end of the boundary line *) - let rec search_end_of_line k = - (* Search LF beginning at position k. Discard any contents until that. *) - try - let i,r = Str.search_forward - lf_re - (Netbuffer.unsafe_buffer (Netstream.window s)) - k - in - (* If match_end <= window_length, the search was successful. - * Otherwise, we searched in the uninitialized region of the - * buffer. - *) - if Str.match_end r <= Netstream.window_length s then begin - Str.match_end r - end - else raise Not_found - with - Not_found -> - if Netstream.at_eos s then - failwith "Mimestring.scan_multipart_body_from_netstream: MIME boundary without line end"; - (* The regexp did not match: move the window. - *) - let n = Netstream.window_length s in - Netstream.move s n; - search_end_of_line 0 - in - - (* Subtask 5: Check whether "--" follows the boundary on the same line *) - let check_whether_last_boundary k = - (* k: The position directly after the boundary. *) - Netstream.want s (k+2); - let str = Netbuffer.unsafe_buffer (Netstream.window s) in - (Netstream.window_length s >= k+2) && str.[k] = '-' && str.[k+1] = '-' - in - - (* Subtask 6: Check whether the buffer begins with a boundary. *) - let check_beginning_is_boundary () = - let m = String.length boundary + 2 in - Netstream.want s m; - let str = Netbuffer.unsafe_buffer (Netstream.window s) in - (Netstream.window_length s >= m) && - (Str.string_partial_match boundary2_re str 0 <> None) - in - - let rec parse_part () = - (* The first byte of the current window of s contains the character - * directly following the boundary line that starts this part. - *) - (* Search the end of the MIME header: *) - let k_eoh = search_end_of_header 0 in - (* Printf.printf "k_eoh=%d\n" k_eoh; *) - (* Get the MIME header: *) - let str = Netbuffer.unsafe_buffer (Netstream.window s) in - let header, k_eoh' = scan_header str 0 k_eoh in - assert (k_eoh = k_eoh'); - (* Move the window over the header: *) - Netstream.move s k_eoh; - (* Create the part: *) - let p = create header in - let continue = - begin try - (* Search the next boundary; add the chunks while searching: *) - let k_eob = search_next_boundary p in - (* Printf.printf "k_eob=%d\n" k_eob; *) - (* Is this the last boundary? *) - if check_whether_last_boundary k_eob then begin - (* Skip the rest: *) - while not (Netstream.at_eos s) do - Netstream.move s (Netstream.window_length s) - done; - Netstream.move s (Netstream.window_length s); - false - end - else begin - (* Move to the beginning of the next line: *) - let k_eol = search_end_of_line k_eob in - Netstream.move s k_eol; - true - end - with - any -> - (try stop p with _ -> ()); - raise any - end in - stop p; - if continue then - (* Continue with next part: *) - parse_part() - in - - (* Check whether s directly begins with a boundary: *) - if check_beginning_is_boundary() then begin - (* Move to the beginning of the next line: *) - let k_eol = search_end_of_line 0 in - Netstream.move s k_eol; - (* Begin with first part: *) - parse_part() - end - else begin - (* Search the first boundary: *) - try - let k_eob = search_first_boundary() in - (* Printf.printf "k_eob=%d\n" k_eob; *) - (* Move to the beginning of the next line: *) - let k_eol = search_end_of_line k_eob in - (* Printf.printf "k_eol=%d\n" k_eol; *) - Netstream.move s k_eol; - (* Begin with first part: *) - parse_part() - with - Not_found -> - (* No boundary at all: The body is empty. *) - () - end; -;; - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.8 2000/08/13 00:04:36 gerd - * Encoded_word -> EncodedWord - * Bugfixes. - * - * Revision 1.7 2000/08/07 00:25:14 gerd - * Implemented the new functions for structured field lexing. - * - * Revision 1.6 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.5 2000/06/25 21:15:48 gerd - * Checked thread-safety. - * - * Revision 1.4 2000/05/16 22:30:14 gerd - * Added support for some types of malformed MIME messages. - * - * Revision 1.3 2000/04/15 13:09:01 gerd - * Implemented uploads to temporary files. - * - * Revision 1.2 2000/03/02 01:15:30 gerd - * Updated. - * - * Revision 1.1 2000/02/25 15:21:12 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/mimestring.mli b/helm/DEVEL/pxp/netstring/mimestring.mli deleted file mode 100644 index 39634b59c..000000000 --- a/helm/DEVEL/pxp/netstring/mimestring.mli +++ /dev/null @@ -1,683 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -(**********************************************************************) -(* Collection of auxiliary functions to parse MIME headers *) -(**********************************************************************) - - -val scan_header : - ?unfold:bool -> - string -> start_pos:int -> end_pos:int -> - ((string * string) list * int) - (* let params, i2 = scan_header s i0 i1: - * - * DESCRIPTION - * - * Scans the MIME header that begins at position i0 in the string s - * and that must end somewhere before position i1. It is intended - * that in i1 the character position following the end of the body of the - * MIME message is passed. - * Returns the parameters of the header as (name,value) pairs (in - * params), and in i2 the position of the character following - * directly after the header (i.e. after the blank line separating - * the header from the body). - * The following normalizations have already been applied: - * - The names are all in lowercase - * - Newline characters (CR and LF) have been removed (unless - * ?unfold:false has been passed) - * - Whitespace at the beginning and at the end of values has been - * removed (unless ?unfold:false is specified) - * The rules of RFC 2047 have NOT been applied. - * The function fails if the header violates the header format - * strongly. (Some minor deviations are tolerated, e.g. it is sufficient - * to separate lines by only LF instead of CRLF.) - * - * OPTIONS: - * - * unfold: If true (the default), folded lines are concatenated and - * returned as one line. This means that CR and LF characters are - * deleted and that whitespace at the beginning and the end of the - * string is removed. - * You may set ?unfold:false to locate individual characters in the - * parameter value exactly. - * - * ABOUT MIME MESSAGE FORMAT: - * - * This is the modern name for messages in "E-Mail format". Messages - * consist of a header and a body; the first empty line separates both - * parts. The header contains lines "param-name: param-value" where - * the param-name must begin on column 0 of the line, and the ":" - * separates the name and the value. So the format is roughly: - * - * param1-name: param1-value - * ... - * paramN-name: paramN-value - * - * body - * - * This function wants in i0 the position of the first character of - * param1-name in the string, and in i1 the position of the character - * following the body. It returns as i2 the position where the body - * begins. Furthermore, in 'params' all parameters are returned that - * exist in the header. - * - * DETAILS - * - * Note that parameter values are restricted; you cannot represent - * arbitrary strings. The following problems can arise: - * - Values cannot begin with whitespace characters, because there - * may be an arbitrary number of whitespaces between the ':' and the - * value. - * - Values (and names of parameters, too) must only be formed of - * 7 bit ASCII characters. (If this is not enough, the MIME standard - * knows the extension RFC 2047 that allows that header values may - * be composed of arbitrary characters of arbitrary character sets.) - * - Header values may be broken into several lines, the continuation - * lines must begin with whitespace characters. This means that values - * must not contain line breaks as semantical part of the value. - * And it may mean that ONE whitespace character is not distinguishable - * from SEVERAL whitespace characters. - * - Header lines must not be longer than 76 characters. Values that - * would result into longer lines must be broken into several lines. - * This means that you cannot represent strings that contain too few - * whitespace characters. - * - Some gateways pad the lines with spaces at the end of the lines. - * - * This implementation of a MIME scanner tolerates a number of - * deviations from the standard: long lines are not rejected; 8 bit - * values are accepted; lines may be ended only with LF instead of - * CRLF. - * Furthermore, header values are transformed: - * - leading and trailing spaces are always removed - * - CRs and LFs are deleted; it is guaranteed that there is at least - * one space or tab where CR/LFs are deleted. - * Last but not least, the names of the header values are converted - * to lowercase; MIME specifies that they are case-independent. - * - * COMPATIBILITY WITH THE STANDARD - * - * This function can parse all MIME headers that conform to RFC 822. - * But there may be still problems, as RFC 822 allows some crazy - * representations that are actually not used in practice. - * In particular, RFC 822 allows it to use backslashes to "indicate" - * that a CRLF sequence is semantically meant as line break. As this - * function normally deletes CRLFs, it is not possible to recognize such - * indicators in the result of the function. - *) - -(**********************************************************************) - -(* The following types and functions allow it to build scanners for - * structured MIME values in a highly configurable way. - * - * WHAT ARE STRUCTURED VALUES? - * - * RFC 822 (together with some other RFCs) defines lexical rules - * how formal MIME header values should be divided up into tokens. Formal - * MIME headers are those headers that are formed according to some - * grammar, e.g. mail addresses or MIME types. - * Some of the characters separate phrases of the value; these are - * the "special" characters. For example, '@' is normally a special - * character for mail addresses, because it separates the user name - * from the domain name. RFC 822 defines a fixed set of special - * characters, but other RFCs use different sets. Because of this, - * the following functions allow it to configure the set of special characters. - * Every sequence of characters may be embraced by double quotes, - * which means that the sequence is meant as literal data item; - * special characters are not recognized inside a quoted string. You may - * use the backslash to insert any character (including double quotes) - * verbatim into the quoted string (e.g. "He said: \"Give it to me!\""). - * The sequence of a backslash character and another character is called - * a quoted pair. - * Structured values may contain comments. The beginning of a comment - * is indicated by '(', and the end by ')'. Comments may be nested. - * Comments may contain quoted pairs. A - * comment counts as if a space character were written instead of it. - * Control characters are the ASCII characters 0 to 31, and 127. - * RFC 822 demands that MIME headers are 7 bit ASCII strings. Because - * of this, this function also counts the characters 128 to 255 as - * control characters. - * Domain literals are strings embraced by '[' and ']'; such literals - * may contain quoted pairs. Today, domain literals are used to specify - * IP addresses. - * Every character sequence not falling in one of the above categories - * is an atom (a sequence of non-special and non-control characters). - * When recognized, atoms may be encoded in a character set different than - * US-ASCII; such atoms are called encoded words (see RFC 2047). - * - * EXTENDED INTERFACE: - * - * In order to scan a string containing a MIME value, you must first - * create a mime_scanner using the function create_mime_scanner. - * The scanner contains the reference to the scanned string, and a - * specification how the string is to be scanned. The specification - * consists of the lists 'specials' and 'scan_options'. - * - * The character list 'specials' specifies the set of special characters. - * These characters are returned as Special c token; the following additional - * rules apply: - * - * - Spaces: - * If ' ' in specials: A space character is returned as Special ' '. - * Note that there may also be an effect on how comments are returned - * (see below). - * If ' ' not in specials: Spaces are ignored. - * - * - Tabs, CRs, LFs: - * If '\t' in specials: A tab character is returned as Special '\t'. - * If '\t' not in specials: Tabs are ignored. - * - * If '\r' in specials: A CR character is returned as Special '\r'. - * If '\r' not in specials: CRs are ignored. - * - * If '\n' in specials: A LF character is returned as Special '\n'. - * If '\n' not in specials: LFs are ignored. - * - * - Comments: - * If '(' in specials: Comments are not recognized. The character '(' - * is returned as Special '('. - * If '(' not in specials: Comments are recognized. How comments are - * returned, depends on the following: - * If Return_comments in scan_options: Outer comments are returned as - * Comment (note that inner comments count but - * are not returned as tokens) - * If otherwise ' ' in specials: Outer comments are returned as - * Special ' ' - * Otherwise: Comments are recognized but ignored. - * - * - Quoted strings: - * If '"' in specials: Quoted strings are not recognized, and double quotes - * are returned as Special '"'. - * If '"' not in specials: Quoted strings are returned as QString tokens. - * - * - Domain literals: - * If '[' in specials: Domain literals are not recognized, and left brackets - * are returned as Special '['. - * If '[' not in specials: Domain literals are returned as DomainLiteral - * tokens. - * - * Note that the rule for domain literals is completely new in netstring-0.9. - * It may cause incompatibilities with previous versions if '[' is not - * special. - * - * The general rule for special characters: Every special character c is - * returned as Special c, and any additional scanning functionality - * for this character is turned off. - * - * If recognized, quoted strings are returned as QString s, where - * s is the string without the embracing quotes, and with already - * decoded quoted pairs. - * - * Control characters c are returned as Control c. - * - * If recognized, comments may either be returned as spaces (in the case - * you are not interested in the contents of comments), or as Comment tokens. - * The contents of comments are not further scanned; you must start a - * subscanner to analyze comments as structured values. - * - * If recognized, domain literals are returned as DomainLiteral s, where - * s is the literal without brackets, and with decoded quoted pairs. - * - * Atoms are returned as Atom s where s is a longest sequence of - * atomic characters (all characters which are neither special nor control - * characters nor delimiters for substructures). If the option - * Recognize_encoded_words is on, atoms which look like encoded words - * are returned as EncodedWord tokens. (Important note: Neither '?' nor - * '=' must be special in order to enable this functionality.) - * - * After the mime_scanner has been created, you can scan the tokens by - * invoking scan_token which returns one token at a time, or by invoking - * scan_token_list which returns all following tokens. - * - * There are two token types: s_token is the base type and is intended to - * be used for pattern matching. s_extended_token is a wrapper that - * additionally contains information where the token occurs. - * - * SIMPLE INTERFACE - * - * Instead of creating a mime_scanner and calling the scan functions, - * you may also invoke scan_structured_value. This function returns the - * list of tokens directly; however, it is restricted to s_token. - * - * EXAMPLES - * - * scan_structured_value "user@domain.com" [ '@'; '.' ] [] - * = [ Atom "user"; Special '@'; Atom "domain"; Special '.'; Atom "com" ] - * - * scan_structured_value "user @ domain . com" [ '@'; '.' ] [] - * = [ Atom "user"; Special '@'; Atom "domain"; Special '.'; Atom "com" ] - * - * scan_structured_value "user(Do you know him?)@domain.com" [ '@'; '.' ] [] - * = [ Atom "user"; Special '@'; Atom "domain"; Special '.'; Atom "com" ] - * - * scan_structured_value "user(Do you know him?)@domain.com" [ '@'; '.' ] - * [ Return_comments ] - * = [ Atom "user"; Comment; Special '@'; Atom "domain"; Special '.'; - * Atom "com" ] - * - * scan_structured_value "user (Do you know him?) @ domain . com" - * [ '@'; '.'; ' ' ] [] - * = [ Atom "user"; Special ' '; Special ' '; Special ' '; Special '@'; - * Special ' '; Atom "domain"; - * Special ' '; Special '.'; Special ' '; Atom "com" ] - * - * scan_structured_value "user (Do you know him?) @ domain . com" - * [ '@'; '.'; ' ' ] [ Return_comments ] - * = [ Atom "user"; Special ' '; Comment; Special ' '; Special '@'; - * Special ' '; Atom "domain"; - * Special ' '; Special '.'; Special ' '; Atom "com" ] - * - * scan_structured_value "user @ domain . com" [ '@'; '.'; ' ' ] [] - * = [ Atom "user"; Special ' '; Special '@'; Special ' '; Atom "domain"; - * Special ' '; Special '.'; Special ' '; Atom "com" ] - * - * scan_structured_value "user(Do you know him?)@domain.com" ['@'; '.'; '('] - * [] - * = [ Atom "user"; Special '('; Atom "Do"; Atom "you"; Atom "know"; - * Atom "him?)"; Special '@'; Atom "domain"; Special '.'; Atom "com" ] - * - * scan_structured_value "\"My.name\"@domain.com" [ '@'; '.' ] [] - * = [ QString "My.name"; Special '@'; Atom "domain"; Special '.'; - * Atom "com" ] - * - * scan_structured_value "=?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?=" - * [ ] [ ] - * = [ Atom "=?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?=" ] - * - * scan_structured_value "=?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?=" - * [ ] [ Recognize_encoded_words ] - * = [ EncodedWord("ISO-8859-1", "Q", "Keld_J=F8rn_Simonsen") ] - * - *) - - - -type s_token = - Atom of string - | EncodedWord of (string * string * string) - | QString of string - | Control of char - | Special of char - | DomainLiteral of string - | Comment - | End - -(* - Words are: Atom, EncodedWord, QString. - * - Atom s: The character sequence forming the atom is contained in s - * - EncodedWord(charset, encoding, encoded_string) means: - * * charset is the (uppercase) character set - * * encoding is either "Q" or "B" - * * encoded_string: contains the text of the word; the text is represented - * as octet string following the conventions for character set charset and - * then encoded either as "Q" or "B" string. - * - QString s: Here, s are the characters inside the double quotes after - * decoding any quoted pairs (backslash + character pairs) - * - Control c: The control character c - * - Special c: The special character c - * - DomainLiteral s: s contains the characters inside the brackets after - * decoding any quoted pairs - * - Comment: if the option Return_comments is specified, this token - * represents the whole comment. - * - End: Is returned after the last token - *) - - -type s_option = - No_backslash_escaping - (* Do not handle backslashes in quoted string and comments as escape - * characters; backslashes are handled as normal characters. - * For example: "C:\dir\file" will be returned as - * QString "C:\dir\file", and not as QString "C:dirfile". - * - This is a common error in many MIME implementations. - *) - | Return_comments - (* Comments are returned as token Comment (unless '(' is included - * in the list of special characters, in which case comments are - * not recognized at all). - * You may get the exact location of the comment by applying - * get_pos and get_length to the extended token. - *) - | Recognize_encoded_words - (* Enables that encoded words are recognized and returned as - * EncodedWord(charset,encoding,content) instead of Atom. - *) - -type s_extended_token - (* An opaque type containing s_token plus: - * - where the token occurs - * - RFC-2047 access functions - *) - -val get_token : s_extended_token -> s_token - (* Return the s_token within the s_extended_token *) - -val get_decoded_word : s_extended_token -> string -val get_charset : s_extended_token -> string - (* Return the decoded word (the contents of the word after decoding the - * "Q" or "B" representation), and the character set of the decoded word - * (uppercase). - * These functions not only work for EncodedWord: - * - Atom: Returns the atom without decoding it - * - QString: Returns the characters inside the double quotes, and - * decodes any quoted pairs (backslash + character) - * - Control: Returns the one-character string - * - Special: Returns the one-character string - * - DomainLiteral: Returns the characters inside the brackets, and - * decodes any quoted pairs - * - Comment: Returns "" - * The character set is "US-ASCII" for these tokens. - *) - -val get_pos : s_extended_token -> int - (* Return the byte position where the token starts in the string - * (the first byte has position 0) - *) - -val get_line : s_extended_token -> int - (* Return the line number where the token starts (numbering begins - * usually with 1) - *) - -val get_column : s_extended_token -> int - (* Return the column of the line where the token starts (first column - * is number 0) - *) - -val get_length : s_extended_token -> int - (* Return the length of the token in bytes *) - -val separates_adjacent_encoded_words : s_extended_token -> bool - (* True iff the current token is white space (Special ' ', Special '\t', - * Special '\r' or Special '\n') and the last non-white space token - * was EncodedWord and the next non-white space token will be - * EncodedWord. - * Such spaces do not count and must be ignored by any application. - *) - - -type mime_scanner - -val create_mime_scanner : - specials:char list -> - scan_options:s_option list -> - ?pos:int -> - ?line:int -> - ?column:int -> - string -> - mime_scanner - (* Creates a new mime_scanner scanning the passed string. - * specials: The list of characters recognized as special characters. - * scan_options: The list of global options modifying the behaviour - * of the scanner - * pos: The position of the byte where the scanner starts in the - * passed string. Defaults to 0. - * line: The line number of this byte. Defaults to 1. - * column: The column number of this byte. Default to 0. - * - * The optional parameters pos, line, column are intentionally after - * scan_options and before the string argument, so you can specify - * scanners by partially applying arguments to create_mime_scanner - * which are not yet connected with a particular string: - * let my_scanner_spec = create_mime_scanner my_specials my_options in - * ... - * let my_scanner = my_scanner_spec my_string in - * ... - *) - -val get_pos_of_scanner : mime_scanner -> int -val get_line_of_scanner : mime_scanner -> int -val get_column_of_scanner : mime_scanner -> int - (* Return the current position, line, and column of a mime_scanner. - * The primary purpose of these functions is to simplify switching - * from one mime_scanner to another within a string: - * - * let scanner1 = create_mime_scanner ... s in - * ... now scanning some tokens from s using scanner1 ... - * let scanner2 = create_mime_scanner ... - * ?pos:(get_pos_of_scanner scanner1) - * ?line:(get_line_of_scanner scanner1) - * ?column:(get_column_of_scanner scanner1) - * s in - * ... scanning more tokens from s using scanner2 ... - * - * RESTRICTION: These functions are not available if the option - * Recognize_encoded_words is on. The reason is that this option - * enables look-ahead scanning; please use the location of the last - * scanned token instead. - * It is currently not clear whether a better implementation is needed - * (costs a bit more time). - * - * Note: To improve the performance of switching, it is recommended to - * create scanner specs in advance (see the example my_scanner_spec - * above). - *) - -val scan_token : mime_scanner -> (s_extended_token * s_token) - (* Returns the next token, or End if there is no more token. *) - -val scan_token_list : mime_scanner -> (s_extended_token * s_token) list - (* Returns all following tokens as a list (excluding End) *) - -val scan_structured_value : string -> char list -> s_option list -> s_token list - (* This function is included for backwards compatibility, and for all - * cases not requiring extended tokens. - * - * It scans the passed string according to the list of special characters - * and the list of options, and returns the list of all tokens. - *) - -val specials_rfc822 : char list -val specials_rfc2045 : char list - (* The sets of special characters defined by the RFCs 822 and 2045. - * - * CHANGE in netstring-0.9: '[' and ']' are no longer special because - * there is now support for domain literals. - * '?' and '=' are not special in the rfc2045 version because there is - * already support for encoded words. - *) - - -(**********************************************************************) - -(* Widely used scanners: *) - - -val scan_encoded_text_value : string -> s_extended_token list - (* Scans a "text" value. The returned token list contains only - * Special, Atom and EncodedWord tokens. - * Spaces, TABs, CRs, LFs are returned unless - * they occur between adjacent encoded words in which case - * they are ignored. - *) - - -val scan_value_with_parameters : string -> s_option list -> - (string * (string * string) list) - (* let name, params = scan_value_with_parameters s options: - * Scans phrases like - * name ; p1=v1 ; p2=v2 ; ... - * The scan is done with the set of special characters [';', '=']. - *) - -val scan_mime_type : string -> s_option list -> - (string * (string * string) list) - (* let name, params = scan_mime_type s options: - * Scans MIME types like - * text/plain; charset=iso-8859-1 - * The name of the type and the names of the parameters are converted - * to lower case. - *) - - -(**********************************************************************) - -(* Scanners for MIME bodies *) - -val scan_multipart_body : string -> start_pos:int -> end_pos:int -> - boundary:string -> - ((string * string) list * string) list - (* let [params1, value1; params2, value2; ...] - * = scan_multipart_body s i0 i1 b - * - * Scans the string s that is the body of a multipart message. - * The multipart message begins at position i0 in s and i1 the position - * of the character following the message. In b the boundary string - * must be passed (this is the "boundary" parameter of the multipart - * MIME type, e.g. multipart/mixed;boundary="some string" ). - * The return value is the list of the parts, where each part - * is returned as pair (params, value). The left component params - * is the list of name/value pairs of the header of the part. The - * right component is the RAW content of the part, i.e. if the part - * is encoded ("content-transfer-encoding"), the content is returned - * in the encoded representation. The caller must himself decode - * the content. - * The material before the first boundary and after the last - * boundary is not returned. - * - * MULTIPART MESSAGES - * - * The MIME standard defines a way to group several message parts to - * a larger message (for E-Mails this technique is known as "attaching" - * files to messages); these are the so-called multipart messages. - * Such messages are recognized by the major type string "multipart", - * e.g. multipart/mixed or multipart/form-data. Multipart types MUST - * have a boundary parameter because boundaries are essential for the - * representation. - * Multipart messages have a format like - * - * ...Header... - * Content-type: multipart/xyz; boundary="abc" - * ...Header... - * - * Body begins here ("prologue") - * --abc - * ...Header part 1... - * - * ...Body part 1... - * --abc - * ...Header part 2... - * - * - * ...Body part 2 - * --abc - * ... - * --abc-- - * Epilogue - * - * The parts are separated by boundary lines which begin with "--" and - * the string passed as boundary parameter. (Note that there may follow - * arbitrary text on boundary lines after "--abc".) The boundary is - * chosen such that it does not occur as prefix of any line of the - * inner parts of the message. - * The parts are again MIME messages, with header and body. Note - * that it is explicitely allowed that the parts are even multipart - * messages. - * The texts before the first boundary and after the last boundary - * are ignored. - * Note that multipart messages as a whole MUST NOT be encoded. - * Only the PARTS of the messages may be encoded (if they are not - * multipart messages themselves). - * - * Please read RFC 2046 if want to know the gory details of this - * brain-dead format. - *) - -val scan_multipart_body_and_decode : string -> start_pos:int -> end_pos:int -> - boundary:string -> - ((string * string) list * string) list - (* Same as scan_multipart_body, but decodes the bodies of the parts - * if they are encoded using the methods "base64" or "quoted printable". - * Fails, if an unknown encoding is used. - *) - -val scan_multipart_body_from_netstream - : Netstream.t -> - boundary:string -> - create:((string * string) list -> 'a) -> - add:('a -> Netstream.t -> int -> int -> unit) -> - stop:('a -> unit) -> - unit - (* scan_multipart_body_from_netstream s b create add stop: - * - * Reads the MIME message from the netstream s block by block. The - * parts are delimited by the boundary b. - * - * Once a new part is detected and begins, the function 'create' is - * called with the MIME header as argument. The result p of this function - * may be of any type. - * - * For every chunk of the part that is being read, the function 'add' - * is invoked: add p s k n. - * Here, p is the value returned by the 'create' invocation for the - * current part. s is the netstream. The current window of s contains - * the read chunk completely; the chunk begins at position k of the - * window (relative to the beginning of the window) and has a length - * of n bytes. - * - * When the part has been fully read, the function 'stop' is - * called with p as argument. - * - * That means, for every part the following is executed: - * - let p = create h - * - add p s k1 n1 - * - add p s k2 n2 - * - ... - * - add p s kN nN - * - stop p - * - * IMPORTANT PRECONDITION: - * - The block size of the netstream s must be at least - * String.length b + 3 - * - * EXCEPTIONS: - * - Exceptions can happen because of ill-formed input, and within - * the callbacks of the functions 'create', 'add', 'stop'. - * - If the exception happens while part p is being read, and the - * 'create' function has already been called (successfully), the - * 'stop' function is also called (you have the chance to close files). - *) - - -(* THREAD-SAFETY: - * The functions are thread-safe as long as the threads do not share - * values. - *) - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.8 2000/08/13 00:04:36 gerd - * Encoded_word -> EncodedWord - * Bugfixes. - * - * Revision 1.7 2000/08/07 00:25:00 gerd - * Major update of the interface for structured field lexing. - * - * Revision 1.6 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.5 2000/06/25 21:15:48 gerd - * Checked thread-safety. - * - * Revision 1.4 2000/05/16 22:29:12 gerd - * New "option" arguments specifying the level of MIME - * compatibility. - * - * Revision 1.3 2000/04/15 13:09:01 gerd - * Implemented uploads to temporary files. - * - * Revision 1.2 2000/03/02 01:15:30 gerd - * Updated. - * - * Revision 1.1 2000/02/25 15:21:12 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/netbuffer.ml b/helm/DEVEL/pxp/netstring/netbuffer.ml deleted file mode 100644 index d6fc40ff7..000000000 --- a/helm/DEVEL/pxp/netstring/netbuffer.ml +++ /dev/null @@ -1,145 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -type t = - { mutable buffer : string; - mutable length : int; - } - -(* To help the garbage collector: - * The 'buffer' has a minimum length of 31 bytes. This minimum can still - * be stored in the minor heap. - * The 'buffer' has a length which is always near a multiple of two. This - * limits the number of different bucket sizes, and simplifies reallocation - * of freed memory. - *) - -(* Optimal string length: - * Every string takes: 1 word for the header, enough words for the - * contents + 1 Null byte (for C compatibility). - * If the buffer grows, it is best to use a new string length such - * that the number of words is exactly twice as large as for the previous - * string. - * n: length of the previous string in bytes - * w: storage size of the previous string in words - * n': length of the new string in bytes - * w' = 2*w: storage size of the new string in words - * - * w = (n+1) / word_length + 1 - * [it is assumed that (n+1) is always a multiple of word_length] - * - * n' = (2*w - 1) * word_length - 1 - * - * n' = [2 * ( [n+1] / word_length + 1) - 1] * word_length - 1 - * = ... - * = (2*n + 2) + word_length - 1 - * = 2 * n + word_length + 1 - * - * n'+1 is again a multiple of word_length: - * n'+1 = 2*n + 2 + word_length - * = 2*(n+1) + word_length - * = a multiple of word_length because n+1 is a multiple of word_length - *) - -let word_length = Sys.word_size / 8 (* in bytes *) - -let create n = - { buffer = String.create (max n 31); length = 0; } - -let contents b = - String.sub b.buffer 0 b.length - -let sub b ~pos:k ~len:n = - if k+n > b.length then - raise (Invalid_argument "Netbuffer.sub"); - String.sub b.buffer k n - -let unsafe_buffer b = - b.buffer - -let length b = - b.length - -let add_string b s = - let l = String.length s in - if l + b.length > String.length b.buffer then begin - let l' = l + b.length in - let rec new_size s = - if s >= l' then s else new_size(2*s + word_length + 1) - in - let buffer' = String.create (new_size (String.length b.buffer)) in - String.blit b.buffer 0 buffer' 0 b.length; - b.buffer <- buffer' - end; - String.blit s 0 b.buffer b.length l; - b.length <- b.length + l - -let add_sub_string b s ~pos:k ~len:l = - if l + b.length > String.length b.buffer then begin - let l' = l + b.length in - let rec new_size s = - if s >= l' then s else new_size(2*s + word_length + 1) - in - let buffer' = String.create (new_size (String.length b.buffer)) in - String.blit b.buffer 0 buffer' 0 b.length; - b.buffer <- buffer' - end; - String.blit s k b.buffer b.length l; - b.length <- b.length + l - -let delete b ~pos:k ~len:l = - (* deletes l bytes at position k in b *) - let n = String.length b.buffer in - if k+l <> n & k <> n then - String.blit b.buffer (k+l) b.buffer k (n-l-k); - b.length <- b.length - l; - () - -let try_shrinking b = - (* If the buffer size decreases drastically, reallocate the buffer *) - if b.length < (String.length b.buffer / 2) then begin - let rec new_size s = - if s >= b.length then s else new_size(2*s + word_length + 1) - in - let buffer' = String.create (new_size 31) in - String.blit b.buffer 0 buffer' 0 b.length; - b.buffer <- buffer' - end - -let clear b = - delete b 0 (b.length) - -let index_from b k c = - if k > b.length then - raise (Invalid_argument "Netbuffer.index_from"); - let p = String.index_from b.buffer k c in - if p >= b.length then raise Not_found; - p - -let print_buffer b = - Format.printf - "" - b.length - (String.length b.buffer) -;; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.3 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.2 2000/06/24 20:20:33 gerd - * Added the toploop printer. - * - * Revision 1.1 2000/04/15 13:07:48 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/netbuffer.mli b/helm/DEVEL/pxp/netstring/netbuffer.mli deleted file mode 100644 index 0ecd61e6a..000000000 --- a/helm/DEVEL/pxp/netstring/netbuffer.mli +++ /dev/null @@ -1,93 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - - -(* A Netbuffer.t is a buffer that can grow and shrink dynamically. *) - -type t - -val create : int -> t - (* Creates a netbuffer which allocates initially this number of bytes. - * The logical length is zero. - *) - -val contents : t -> string - (* Returns the contents of the buffer as fresh string. *) - -val sub : t -> pos:int -> len:int -> string - (* sub nb k n: returns the n characters starting at position n from - * netbuffer nb as fresh string - *) - -val length : t -> int - (* Returns the logical length of the buffer *) - -val add_string : t -> string -> unit - (* add_string nb s: Adds a copy of the string s to the logical end of - * the netbuffer nb. If necessary, the nb grows. - *) - -val add_sub_string : t -> string -> pos:int -> len:int -> unit - (* add_sub_string nb s k n: Adds the substring of s starting at position - * k with length n to the logical end of the netbuffer nb. If necessary, - * the nb grows. - * This is semantically the same as - * add_string nb (String.sub s k n), but the extra copy is avoided. - *) - -val delete : t -> pos:int -> len:int -> unit - (* delete nb k n: Deletes the n bytes at position k of netbuffer nb - * in-place. - * The netbuffer does not shrink! - *) - -val clear : t -> unit - (* deletes all contents from the buffer. As 'delete', the netbuffer does - * not shrink. - *) - -val try_shrinking : t -> unit - (* try_shrinking nb: If the length of the buffer is less than half of - * the allocated space, the netbuffer is reallocated in order to save - * memory. - *) - -val index_from : t -> int -> char -> int - (* index_from nb k c: Searches the character c in the netbuffer beginning - * at position k. If found, the position of the left-most occurence is - * returned. Otherwise, Not_found is raised. - *) - -val unsafe_buffer : t -> string - (* WARNING! This is a low-level function! - * Returns the current string that internally holds the buffer. - * The byte positions 0 to length - 1 actually store the contents of - * the buffer. You can directly read and modify the buffer. Note that - * there is no protection if you read or write positions beyond the - * length of the buffer. - *) - -val print_buffer : t -> unit - (* For the toploop *) - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.3 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.2 2000/06/24 20:20:33 gerd - * Added the toploop printer. - * - * Revision 1.1 2000/04/15 13:07:48 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/netconversion.ml b/helm/DEVEL/pxp/netstring/netconversion.ml deleted file mode 100644 index e740654ad..000000000 --- a/helm/DEVEL/pxp/netstring/netconversion.ml +++ /dev/null @@ -1,864 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - *) - -exception Malformed_code - - -type encoding = - [ `Enc_utf8 (* UTF-8 *) - | `Enc_java - | `Enc_utf16 (* UTF-16 with unspecified endianess (restricted usage) *) - | `Enc_utf16_le (* UTF-16 little endian *) - | `Enc_utf16_be (* UTF-16 big endian *) - | `Enc_usascii (* US-ASCII (only 7 bit) *) - | `Enc_iso88591 (* ISO-8859-1 *) - | `Enc_iso88592 (* ISO-8859-2 *) - | `Enc_iso88593 (* ISO-8859-3 *) - | `Enc_iso88594 (* ISO-8859-4 *) - | `Enc_iso88595 (* ISO-8859-5 *) - | `Enc_iso88596 (* ISO-8859-6 *) - | `Enc_iso88597 (* ISO-8859-7 *) - | `Enc_iso88598 (* ISO-8859-8 *) - | `Enc_iso88599 (* ISO-8859-9 *) - | `Enc_iso885910 (* ISO-8859-10 *) - | `Enc_iso885913 (* ISO-8859-13 *) - | `Enc_iso885914 (* ISO-8859-14 *) - | `Enc_iso885915 (* ISO-8859-15 *) - | `Enc_koi8r (* KOI8-R *) - | `Enc_jis0201 (* JIS-0201 *) - (* Microsoft: *) - | `Enc_windows1250 (* WINDOWS-1250 *) - | `Enc_windows1251 (* WINDOWS-1251 *) - | `Enc_windows1252 (* WINDOWS-1252 *) - | `Enc_windows1253 (* WINDOWS-1253 *) - | `Enc_windows1254 (* WINDOWS-1254 *) - | `Enc_windows1255 (* WINDOWS-1255 *) - | `Enc_windows1256 (* WINDOWS-1256 *) - | `Enc_windows1257 (* WINDOWS-1257 *) - | `Enc_windows1258 (* WINDOWS-1258 *) - (* IBM, ASCII-based: *) - | `Enc_cp437 - | `Enc_cp737 - | `Enc_cp775 - | `Enc_cp850 - | `Enc_cp852 - | `Enc_cp855 - | `Enc_cp856 - | `Enc_cp857 - | `Enc_cp860 - | `Enc_cp861 - | `Enc_cp862 - | `Enc_cp863 - | `Enc_cp864 - | `Enc_cp865 - | `Enc_cp866 - | `Enc_cp869 - | `Enc_cp874 - | `Enc_cp1006 - (* IBM, EBCDIC-based: *) - | `Enc_cp037 - | `Enc_cp424 - | `Enc_cp500 - | `Enc_cp875 - | `Enc_cp1026 - (* Adobe: *) - | `Enc_adobe_standard_encoding - | `Enc_adobe_symbol_encoding - | `Enc_adobe_zapf_dingbats_encoding - (* Apple: *) - | `Enc_macroman - - ] -;; - - -let norm_enc_name e = - (* Removes some characters from e; uppercase *) - let e' = String.create (String.length e) in - let rec next i j = - if i < String.length e then - match e.[i] with - ('-'|'_'|'.') -> next (i+1) j - | c -> e'.[j] <- c; next (i+1) (j+1) - else - j - in - let l = next 0 0 in - String.uppercase(String.sub e' 0 l) -;; - - -let encoding_of_string e = - match norm_enc_name e with - ("UTF16"|"UCS2"|"ISO10646UCS2") -> `Enc_utf16 - | "UTF16BE" -> `Enc_utf16_be - | "UTF16LE" -> `Enc_utf16_le - | "UTF8" -> `Enc_utf8 - | ("UTF8JAVA"|"JAVA") -> `Enc_java - | ("USASCII"|"ASCII"|"ISO646US"|"IBM367"|"CP367") -> `Enc_usascii - | ("ISO88591"|"LATIN1"|"IBM819"|"CP819") -> `Enc_iso88591 - | ("ISO88592"|"LATIN2") -> `Enc_iso88592 - | ("ISO88593"|"LATIN3") -> `Enc_iso88593 - | ("ISO88594"|"LATIN4") -> `Enc_iso88594 - | ("ISO88595"|"CYRILLIC") -> `Enc_iso88595 - | ("ISO88596"|"ARABIC"|"ECMA114"|"ASMO708") -> `Enc_iso88596 - | ("ISO88597"|"GREEK"|"GREEK8"|"ELOT928"|"ECMA118") -> `Enc_iso88597 - | ("ISO88598"|"HEBREW") -> `Enc_iso88598 - | ("ISO88599"|"LATIN5") -> `Enc_iso88599 - | ("ISO885910"|"LATIN6") -> `Enc_iso885910 - | "ISO885913" -> `Enc_iso885913 - | "ISO885914" -> `Enc_iso885914 - | "ISO885915" -> `Enc_iso885915 - | "KOI8R" -> `Enc_koi8r - | ("JIS0201"|"JISX0201"|"X0201") -> `Enc_jis0201 - - | "WINDOWS1250" -> `Enc_windows1250 - | "WINDOWS1251" -> `Enc_windows1251 - | "WINDOWS1252" -> `Enc_windows1252 - | "WINDOWS1253" -> `Enc_windows1253 - | "WINDOWS1254" -> `Enc_windows1254 - | "WINDOWS1255" -> `Enc_windows1255 - | "WINDOWS1256" -> `Enc_windows1256 - | "WINDOWS1257" -> `Enc_windows1257 - | "WINDOWS1258" -> `Enc_windows1258 - - | ("CP437"|"IBM437") -> `Enc_cp437 - | ("CP737"|"IBM737") -> `Enc_cp737 - | ("CP775"|"IBM775") -> `Enc_cp775 - | ("CP850"|"IBM850") -> `Enc_cp850 - | ("CP852"|"IBM852") -> `Enc_cp852 - | ("CP855"|"IBM855") -> `Enc_cp855 - | ("CP856"|"IBM856") -> `Enc_cp856 - | ("CP857"|"IBM857") -> `Enc_cp857 - | ("CP860"|"IBM860") -> `Enc_cp860 - | ("CP861"|"IBM861") -> `Enc_cp861 - | ("CP862"|"IBM862") -> `Enc_cp862 - | ("CP863"|"IBM863") -> `Enc_cp863 - | ("CP864"|"IBM864") -> `Enc_cp864 - | ("CP865"|"IBM865") -> `Enc_cp865 - | ("CP866"|"IBM866") -> `Enc_cp866 - | ("CP869"|"IBM869") -> `Enc_cp869 - | ("CP874"|"IBM874") -> `Enc_cp874 - | ("CP1006"|"IBM1006") -> `Enc_cp1006 - - | ("CP037"|"IBM037"|"EBCDICCPUS"|"EBCDICCPCA"|"EBCDICCPWT"| - "EBCDICCPNL") -> `Enc_cp037 - | ("CP424"|"IBM424"|"EBCDICCPHE") -> `Enc_cp424 - | ("CP500"|"IBM500"|"EBCDICCPBE"|"EBCDICCPCH") -> `Enc_cp500 - | ("CP875"|"IBM875") -> `Enc_cp875 - | ("CP1026"|"IBM1026") -> `Enc_cp1026 - - | "ADOBESTANDARDENCODING" -> `Enc_adobe_standard_encoding - | "ADOBESYMBOLENCODING" -> `Enc_adobe_symbol_encoding - | "ADOBEZAPFDINGBATSENCODING" -> `Enc_adobe_zapf_dingbats_encoding - - | "MACINTOSH" -> `Enc_macroman - - | _ -> - failwith "Netconversion.encoding_of_string: unknown encoding" -;; - - -let string_of_encoding (e : encoding) = - (* If there is a "preferred MIME name", this name is returned (see IANA). *) - match e with - `Enc_utf16 -> "UTF-16" - | `Enc_utf16_be -> "UTF-16-BE" - | `Enc_utf16_le -> "UTF-16-LE" - | `Enc_utf8 -> "UTF-8" - | `Enc_java -> "UTF-8-JAVA" - | `Enc_usascii -> "US-ASCII" - | `Enc_iso88591 -> "ISO-8859-1" - | `Enc_iso88592 -> "ISO-8859-2" - | `Enc_iso88593 -> "ISO-8859-3" - | `Enc_iso88594 -> "ISO-8859-4" - | `Enc_iso88595 -> "ISO-8859-5" - | `Enc_iso88596 -> "ISO-8859-6" - | `Enc_iso88597 -> "ISO-8859-7" - | `Enc_iso88598 -> "ISO-8859-8" - | `Enc_iso88599 -> "ISO-8859-9" - | `Enc_iso885910 -> "ISO-8859-10" - | `Enc_iso885913 -> "ISO-8859-13" - | `Enc_iso885914 -> "ISO-8859-14" - | `Enc_iso885915 -> "ISO-8859-15" - | `Enc_koi8r -> "KOI8-R" - | `Enc_jis0201 -> "JIS_X0201" - | `Enc_windows1250 -> "WINDOWS-1250" - | `Enc_windows1251 -> "WINDOWS-1251" - | `Enc_windows1252 -> "WINDOWS-1252" - | `Enc_windows1253 -> "WINDOWS-1253" - | `Enc_windows1254 -> "WINDOWS-1254" - | `Enc_windows1255 -> "WINDOWS-1255" - | `Enc_windows1256 -> "WINDOWS-1256" - | `Enc_windows1257 -> "WINDOWS-1257" - | `Enc_windows1258 -> "WINDOWS-1258" - | `Enc_cp437 -> "CP437" - | `Enc_cp737 -> "CP737" - | `Enc_cp775 -> "CP775" - | `Enc_cp850 -> "CP850" - | `Enc_cp852 -> "CP852" - | `Enc_cp855 -> "CP855" - | `Enc_cp856 -> "CP856" - | `Enc_cp857 -> "CP857" - | `Enc_cp860 -> "CP860" - | `Enc_cp861 -> "CP861" - | `Enc_cp862 -> "CP862" - | `Enc_cp863 -> "CP863" - | `Enc_cp864 -> "CP864" - | `Enc_cp865 -> "CP865" - | `Enc_cp866 -> "CP866" - | `Enc_cp869 -> "CP869" - | `Enc_cp874 -> "CP874" - | `Enc_cp1006 -> "CP1006" - | `Enc_cp037 -> "CP037" - | `Enc_cp424 -> "CP424" - | `Enc_cp500 -> "CP500" - | `Enc_cp875 -> "CP875" - | `Enc_cp1026 -> "CP1026" - | `Enc_adobe_standard_encoding -> "ADOBE-STANDARD-ENCODING" - | `Enc_adobe_symbol_encoding -> "ADOBE-SYMBOL-ENCODING" - | `Enc_adobe_zapf_dingbats_encoding -> "ADOBE-ZAPF-DINGBATS-ENCODING" - | `Enc_macroman -> "MACINTOSH" -;; - - -let read_iso88591 write s_in p_in l_in = - let rec scan k_in k_out c_out = - if k_in < l_in then begin - let p = Char.code s_in.[p_in + k_in] in - let n = write p k_out c_out in - if n < 0 then - k_in, k_out, `Enc_iso88591 - else - scan (k_in + 1) (k_out + n) (c_out + 1) - end - else - k_in, k_out, `Enc_iso88591 - in - scan 0 0 0 -;; - - -let read_usascii write s_in p_in l_in = - let rec scan k_in k_out c_out = - if k_in < l_in then begin - let p = Char.code s_in.[p_in + k_in] in - if p >= 0x80 then raise Malformed_code; - let n = write p k_out c_out in - if n < 0 then - k_in, k_out, `Enc_usascii - else - scan (k_in + 1) (k_out + n) (c_out + 1) - end - else - k_in, k_out, `Enc_usascii - in - scan 0 0 0 -;; - - -let read_8bit m_to_unicode enc write s_in p_in l_in = - let rec scan k_in k_out c_out = - if k_in < l_in then begin - let p_local = Char.code s_in.[p_in + k_in] in - let p_uni = Array.unsafe_get m_to_unicode p_local in - if p_uni < 0 then raise Malformed_code; - let n = write p_uni k_out c_out in - if n < 0 then - k_in, k_out, enc - else - scan (k_in + 1) (k_out + n) (c_out + 1) - end - else - k_in, k_out, enc - in - scan 0 0 0 -;; - - -let read_utf8 is_java write s_in p_in l_in = - let rec scan k_in k_out c_out = - if k_in < l_in then begin - let n_out, n_in = - match s_in.[p_in + k_in] with - '\000' -> - if is_java then raise Malformed_code; - write 0 k_out c_out, 1 - | ('\001'..'\127' as c) -> - write (Char.code c) k_out c_out, 1 - | ('\128'..'\223' as c) -> - if k_in + 1 >= l_in then - -1, 0 - else begin - let n1 = Char.code c in - let n2 = Char.code (s_in.[p_in + k_in + 1]) in - if is_java && (n1 = 0x80 && n2 = 0xc0) then - write 0 k_out c_out, 2 - else begin - if n2 < 128 or n2 > 191 then raise Malformed_code; - let p = ((n1 land 0b11111) lsl 6) lor (n2 land 0b111111) in - if p < 128 then raise Malformed_code; - write p k_out c_out, 2 - end - end - | ('\224'..'\239' as c) -> - if k_in + 2 >= l_in then - -1, 0 - else begin - let n1 = Char.code c in - let n2 = Char.code (s_in.[p_in + k_in + 1]) in - let n3 = Char.code (s_in.[p_in + k_in + 2]) in - if n2 < 128 or n2 > 191 then raise Malformed_code; - if n3 < 128 or n3 > 191 then raise Malformed_code; - let p = - ((n1 land 0b1111) lsl 12) lor - ((n2 land 0b111111) lsl 6) lor - (n3 land 0b111111) - in - if p < 0x800 then raise Malformed_code; - if (p >= 0xd800 && p < 0xe000) then - (* Surrogate pairs are not supported in UTF-8 *) - raise Malformed_code; - if (p >= 0xfffe && p <= 0xffff) then - raise Malformed_code; - write p k_out c_out, 3 - end - | ('\240'..'\247' as c) -> - if k_in + 3 >= l_in then - -1, 0 - else begin - let n1 = Char.code c in - let n2 = Char.code (s_in.[p_in + k_in + 1]) in - let n3 = Char.code (s_in.[p_in + k_in + 2]) in - let n4 = Char.code (s_in.[p_in + k_in + 3]) in - if n2 < 128 or n2 > 191 then raise Malformed_code; - if n3 < 128 or n3 > 191 then raise Malformed_code; - if n4 < 128 or n4 > 191 then raise Malformed_code; - let p = ((n1 land 0b111) lsl 18) lor - ((n2 land 0b111111) lsl 12) lor - ((n3 land 0b111111) lsl 6) lor - (n4 land 0b111111) - in - if p < 0x10000 then raise Malformed_code; - if p >= 0x110000 then - (* These code points are not supported. *) - raise Malformed_code; - write p k_out c_out, 4 - end - | _ -> - (* Outside the valid range of XML characters *) - raise Malformed_code; - in - (* n_out: number of written bytes; -1 means out buf is full - * n_in: number of read bytes; 0 means end of in buf reached - * n_in = 0 implies n_out = -1 - *) - if n_out < 0 then - k_in, k_out, `Enc_utf8 - else - scan (k_in + n_in) (k_out + n_out) (c_out + 1) - end - else - k_in, k_out, `Enc_utf8 - in - scan 0 0 0 -;; - - -let surrogate_offset = 0x10000 - (0xD800 lsl 10) - 0xDC00;; - -let read_utf16_le k_in_0 write s_in p_in l_in = - let rec scan k_in k_out c_out = - if k_in + 1 < l_in then begin - let p = (Char.code s_in.[p_in + k_in]) lor ((Char.code s_in.[p_in + k_in + 1]) lsl 8) in - - if p >= 0xd800 & p < 0xe000 then begin - (* This is a surrogate pair. *) - if k_in + 3 < l_in then begin - if p <= 0xdbff then begin - let q = (Char.code s_in.[p_in + k_in + 2 ]) lor - ((Char.code s_in.[p_in + k_in + 3]) lsl 8) in - if q < 0xdc00 or q > 0xdfff then raise Malformed_code; - let eff_p = (p lsl 10) + q + surrogate_offset in - let n = write eff_p k_out c_out in - if n < 0 then - k_in, k_out, `Enc_utf16_le - else - scan (k_in + 4) (k_out + n) (c_out + 1) - end - else - (* Malformed pair: *) - raise Malformed_code; - end - else - (* Incomplete pair: *) - k_in, k_out, `Enc_utf16_le - end - - else - if p = 0xfffe then - (* Big endian byte order mark: It is illegal here *) - raise Malformed_code - else begin - (* A regular code point *) - let n = write p k_out c_out in - if n < 0 then - k_in, k_out, `Enc_utf16_le - else - scan (k_in + 2) (k_out + n) (c_out + 1) - end - end - else - (* Incomplete character: *) - k_in, k_out, `Enc_utf16_le - in - scan k_in_0 0 0 -;; - - -let read_utf16_be k_in_0 write s_in p_in l_in = - let rec scan k_in k_out c_out = - if k_in + 1 < l_in then begin - let p = (Char.code s_in.[p_in + k_in + 1]) lor ((Char.code s_in.[p_in + k_in]) lsl 8) in - - if p >= 0xd800 & p < 0xe000 then begin - (* This is a surrogate pair. *) - if k_in + 3 < l_in then begin - if p <= 0xdbff then begin - let q = (Char.code s_in.[p_in + k_in + 3 ]) lor - ((Char.code s_in.[p_in + k_in + 2]) lsl 8) in - if q < 0xdc00 or q > 0xdfff then raise Malformed_code; - let eff_p = (p lsl 10) + q + surrogate_offset in - let n = write eff_p k_out c_out in - if n < 0 then - k_in, k_out, `Enc_utf16_be - else - scan (k_in + 4) (k_out + n) (c_out + 1) - end - else - (* Malformed pair: *) - raise Malformed_code; - end - else - (* Incomplete pair: *) - k_in, k_out, `Enc_utf16_be - end - - else - if p = 0xfffe then - (* Little endian byte order mark: It is illegal here *) - raise Malformed_code - else begin - (* A regular code point *) - let n = write p k_out c_out in - if n < 0 then - k_in, k_out, `Enc_utf16_be - else - scan (k_in + 2) (k_out + n) (c_out + 1) - end - - end - else - (* Incomplete character: *) - k_in, k_out, `Enc_utf16_be - in - scan k_in_0 0 0 -;; - - -let read_utf16 write s_in p_in l_in = - (* Expect a BOM at the beginning of the text *) - if l_in >= 2 then begin - let c0 = s_in.[p_in + 0] in - let c1 = s_in.[p_in + 1] in - if c0 = '\254' & c1 = '\255' then begin - (* 0xfeff as big endian *) - read_utf16_be 2 write s_in p_in l_in - end - else - if c0 = '\255' & c1 = '\254' then begin - (* 0xfeff as little endian *) - read_utf16_le 2 write s_in p_in l_in - end - else - (* byte order mark missing *) - raise Malformed_code - end - else - 0, 0, `Enc_utf16 -;; - - -let write_iso88591 s_out p_out l_out max_chars w p k_out c_out = - if k_out < l_out && c_out < max_chars then begin - if p > 255 then begin - let subst = w p in - let l_subst = String.length subst in - if k_out + l_subst <= l_out then begin - (* Enough space to store 'subst': *) - String.blit subst 0 s_out (k_out+p_out) l_subst; - l_subst - end - else - (* Not enough space: Stop this round of recoding *) - -1 - end - else begin - s_out.[p_out + k_out] <- Char.chr p; - 1 - end - end - else - -1 (* End-of-buffer indicator *) -;; - - -let write_usascii s_out p_out l_out max_chars w p k_out c_out = - if k_out < l_out && c_out < max_chars then begin - if p > 127 then begin - let subst = w p in - let l_subst = String.length subst in - if k_out + l_subst <= l_out then begin - (* Enough space to store 'subst': *) - String.blit subst 0 s_out (k_out+p_out) l_subst; - l_subst - end - else - (* Not enough space: Stop this round of recoding *) - -1 - end - else begin - s_out.[p_out + k_out] <- Char.chr p; - 1 - end - end - else - -1 (* End-of-buffer indicator *) -;; - - -let write_8bit from_unicode s_out p_out l_out max_chars w p k_out c_out = - if k_out < l_out && c_out < max_chars then begin - let p' = - match Array.unsafe_get from_unicode (p land 255) with - Netmappings.U_nil -> -1 - | Netmappings.U_single (p0,q0) -> - if p0 = p then q0 else -1 - | Netmappings.U_list l -> - (try List.assoc p l with Not_found -> -1) - in - if p' < 0 then begin - let subst = w p in - let l_subst = String.length subst in - if k_out + l_subst <= l_out then begin - (* Enough space to store 'subst': *) - String.blit subst 0 s_out (k_out+p_out) l_subst; - l_subst - end - else - (* Not enough space: Stop this round of recoding *) - -1 - end - else begin - s_out.[p_out + k_out] <- Char.chr p'; - 1 - end - end - else - -1 (* End-of-buffer indicator *) -;; - - -let write_utf8 is_java s_out p_out l_out max_chars w p k_out c_out = - if p <= 127 && (not is_java || p <> 0) then begin - if k_out < l_out && c_out < max_chars then begin - s_out.[p_out + k_out] <- Char.chr p; - 1 - end - else -1 - end - else if p <= 0x7ff then begin - if k_out + 1 < l_out && c_out < max_chars then begin - s_out.[p_out + k_out] <- Char.chr (0xc0 lor (p lsr 6)); - s_out.[p_out + k_out + 1] <- Char.chr (0x80 lor (p land 0x3f)); - 2 - end - else -1 - end - else if p <= 0xffff then begin - (* Refuse writing surrogate pairs, and fffe, ffff *) - if (p >= 0xd800 & p < 0xe000) or (p >= 0xfffe) then - failwith "Netconversion.write_utf8"; - if k_out + 2 < l_out && c_out < max_chars then begin - s_out.[p_out + k_out] <- Char.chr (0xe0 lor (p lsr 12)); - s_out.[p_out + k_out + 1] <- Char.chr (0x80 lor ((p lsr 6) land 0x3f)); - s_out.[p_out + k_out + 2] <- Char.chr (0x80 lor (p land 0x3f)); - 3 - end - else -1 - end - else if p <= 0x10ffff then begin - if k_out + 3 < l_out && c_out < max_chars then begin - s_out.[p_out + k_out] <- Char.chr (0xf0 lor (p lsr 18)); - s_out.[p_out + k_out + 1] <- Char.chr (0x80 lor ((p lsr 12) land 0x3f)); - s_out.[p_out + k_out + 2] <- Char.chr (0x80 lor ((p lsr 6) land 0x3f)); - s_out.[p_out + k_out + 3] <- Char.chr (0x80 lor (p land 0x3f)); - 4 - end - else -1 - end - else - (* Higher code points are not possible in XML: *) - failwith "Netconversion.write_utf8" -;; - - -let write_utf16_le s_out p_out l_out max_chars w p k_out c_out = - if p >= 0xfffe then begin - if p <= 0xffff or p > 0x10ffff then failwith "Netconversion.write_utf16_le"; - (* Must be written as surrogate pair *) - if k_out + 3 < l_out && c_out < max_chars then begin - let high = (p lsr 10) + 0xd800 in - let low = (p land 0x3ff) + 0xdc00 in - s_out.[p_out + k_out ] <- Char.chr (high land 0xff); - s_out.[p_out + k_out + 1] <- Char.chr (high lsr 8); - s_out.[p_out + k_out + 2] <- Char.chr (low land 0xff); - s_out.[p_out + k_out + 3] <- Char.chr (low lsr 8); - 4 - end - else -1 - end - else begin - if k_out + 1 < l_out && c_out < max_chars then begin - s_out.[p_out + k_out ] <- Char.chr (p land 0xff); - s_out.[p_out + k_out + 1] <- Char.chr (p lsr 8); - 2 - end - else - -1 - end -;; - - -let write_utf16_be s_out p_out l_out max_chars w p k_out c_out = - if p >= 0xfffe then begin - if p <= 0xffff or p > 0x10ffff then failwith "Netconversion.write_utf16_be"; - (* Must be written as surrogate pair *) - if k_out + 3 < l_out && c_out < max_chars then begin - let high = (p lsr 10) + 0xd800 in - let low = (p land 0x3ff) + 0xdc00 in - s_out.[p_out + k_out + 1] <- Char.chr (high land 0xff); - s_out.[p_out + k_out ] <- Char.chr (high lsr 8); - s_out.[p_out + k_out + 3] <- Char.chr (low land 0xff); - s_out.[p_out + k_out + 2] <- Char.chr (low lsr 8); - 4 - end - else -1 - end - else begin - if k_out + 1 < l_out && c_out < max_chars then begin - s_out.[p_out + k_out + 1] <- Char.chr (p land 0xff); - s_out.[p_out + k_out ] <- Char.chr (p lsr 8); - 2 - end - else - -1 - end -;; - - -let recode ~in_enc - ~in_buf - ~in_pos - ~in_len - ~out_enc - ~out_buf - ~out_pos - ~out_len - ~max_chars - ~subst = - if (in_pos < 0 || in_len < 0 || in_pos + in_len > String.length in_buf || - out_pos < 0 || out_len < 0 || out_pos + out_len > String.length out_buf) - then - invalid_arg "Netconversion.recode"; - - let reader = - match in_enc with - `Enc_iso88591 -> read_iso88591 - | `Enc_usascii -> read_usascii - | `Enc_utf8 -> read_utf8 false - | `Enc_java -> read_utf8 true - | `Enc_utf16 -> read_utf16 - | `Enc_utf16_le -> read_utf16_le 0 - | `Enc_utf16_be -> read_utf16_be 0 - | _ -> - (try - let to_unicode' = Hashtbl.find Netmappings.to_unicode in_enc in - let to_unicode = - Netmappings.lock(); - Lazy.force to_unicode' in - Netmappings.unlock(); - read_8bit to_unicode in_enc - with - Not_found -> - failwith("Support for the encoding `" ^ - string_of_encoding in_enc ^ - "' has not been compiled into Netstring") - ) - in - let writer = - match out_enc with - `Enc_iso88591 -> write_iso88591 out_buf out_pos out_len max_chars subst - | `Enc_usascii -> write_usascii out_buf out_pos out_len max_chars subst - | `Enc_utf8 -> write_utf8 false - out_buf out_pos out_len max_chars subst - | `Enc_java -> write_utf8 true out_buf out_pos out_len max_chars subst - | `Enc_utf16 -> failwith "Netconversion.recode" - | `Enc_utf16_le -> write_utf16_le out_buf out_pos out_len max_chars subst - | `Enc_utf16_be -> write_utf16_be out_buf out_pos out_len max_chars subst - | _ -> - (try - let from_unicode' = Hashtbl.find Netmappings.from_unicode out_enc - in - let from_unicode = - Netmappings.lock(); - Lazy.force from_unicode' in - Netmappings.unlock(); - write_8bit from_unicode out_buf out_pos out_len max_chars subst - with - Not_found -> - failwith("Support for the encoding `" ^ - string_of_encoding out_enc ^ - "' has not been compiled into Netstring") - ) - in - reader writer in_buf in_pos in_len -;; - - -let makechar enc p = - match enc with - `Enc_iso88591 -> - if p > 255 then raise Not_found; - String.make 1 (Char.chr p) - | `Enc_usascii -> - if p > 127 then raise Not_found; - String.make 1 (Char.chr p) - | `Enc_utf8 -> - let s = String.create 4 in - let n = write_utf8 false s 0 4 1 (fun _ -> raise Not_found) p 0 0 in - String.sub s 0 n - | `Enc_java -> - let s = String.create 4 in - let n = write_utf8 true s 0 4 1 (fun _ -> raise Not_found) p 0 0 in - String.sub s 0 n - | `Enc_utf16_le -> - let s = String.create 4 in - let n = write_utf16_le s 0 4 1 (fun _ -> raise Not_found) p 0 0 in - String.sub s 0 n - | `Enc_utf16_be -> - let s = String.create 4 in - let n = write_utf16_be s 0 4 1 (fun _ -> raise Not_found) p 0 0 in - String.sub s 0 n - | `Enc_utf16 -> - failwith "Netconversion.makechar" - | _ -> - let s = String.create 1 in - let from_unicode' = - try - Hashtbl.find Netmappings.from_unicode enc - with - Not_found -> - failwith("Support for the encoding `" ^ - string_of_encoding enc ^ - "' has not been compiled into Netstring") - in - let from_unicode = - Netmappings.lock(); - Lazy.force from_unicode' in - Netmappings.unlock(); - let n = - write_8bit from_unicode s 0 1 1 (fun _ -> raise Not_found) p 0 0 in - s -;; - - -let recode_string ~in_enc ~out_enc ?(subst = (fun _ -> raise Not_found)) s = - - let length = String.length s in - let size = 1024 in - let out_buf = String.create size in - - let rec recode_loop k s_done in_enc = - (* 'k' bytes of 's' have already been processed, and the result is in - * 's_done'. - *) - (* Recode to 'out_buf': *) - let in_len = length - k in - let in_done, out_done, in_enc' = - recode ~in_enc:in_enc ~in_buf:s ~in_pos:k ~in_len:in_len - ~out_enc:out_enc ~out_buf:out_buf ~out_pos:0 ~out_len:size - ~max_chars:size ~subst:subst in - (* Collect the results: *) - let k' = k + in_done in - let s_done' = String.sub out_buf 0 out_done :: s_done in - (* Still something to do? *) - if k' < length then - recode_loop k' s_done' in_enc' - else - (* No: Concatenate s_done' to get the final result. *) - String.concat "" (List.rev s_done') - in - - recode_loop 0 [] in_enc -;; - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:28 lpadovan - * Initial revision - * - * Revision 1.2 2000/08/29 00:46:41 gerd - * New type for the Unicode to 8 bit translation table. - * The Netmappings tables are now Lazy.t. - * - * Revision 1.1 2000/08/13 00:02:57 gerd - * Initial revision. - * - * - * ====================================================================== - * OLD LOGS FROM THE PXP PACKAGE (FILE NAME pxp_encoding.ml): - * - * Revision 1.5 2000/07/27 00:41:14 gerd - * new 8 bit codes - * - * Revision 1.4 2000/07/04 22:11:41 gerd - * Implemented the enhancements and extensions of - * rev. 1.4 of pxp_encoding.mli. - * - * Revision 1.3 2000/05/29 23:48:38 gerd - * Changed module names: - * Markup_aux into Pxp_aux - * Markup_codewriter into Pxp_codewriter - * Markup_document into Pxp_document - * Markup_dtd into Pxp_dtd - * Markup_entity into Pxp_entity - * Markup_lexer_types into Pxp_lexer_types - * Markup_reader into Pxp_reader - * Markup_types into Pxp_types - * Markup_yacc into Pxp_yacc - * See directory "compatibility" for (almost) compatible wrappers emulating - * Markup_document, Markup_dtd, Markup_reader, Markup_types, and Markup_yacc. - * - * Revision 1.2 2000/05/29 21:14:57 gerd - * Changed the type 'encoding' into a polymorphic variant. - * - * Revision 1.1 2000/05/20 20:30:50 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/netconversion.mli b/helm/DEVEL/pxp/netstring/netconversion.mli deleted file mode 100644 index 5e3e4b4e1..000000000 --- a/helm/DEVEL/pxp/netstring/netconversion.mli +++ /dev/null @@ -1,241 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - *) - -exception Malformed_code - -(* Encodings: - * - With the exception of UTF-8 and UTF-16, only single-byte character sets - * are supported. - * - I took the mappings from www.unicode.org, and the standard names of - * the character sets from IANA. Obviously, many character sets are missing - * that can be supported; especially ISO646 character sets, many EBCDIC - * code pages. - * - Because of the copyright statement from Unicode, I cannot put the - * source tables that describe the mappings into the distribution. They - * are publicly available from www.unicode.org. - * - Because of this, it is difficult for you to extend the list of character - * sets; you need the source tables I am not allowed to distribute. - * These tables have a very simple format: Every line describes a pair - * of code points; the left code (<= 0xff) is the code in the character - * set, the right code (<= 0xffff) is the Unicode equivalent. - * For an example, see - * http://www.unicode.org/Public/MAPPINGS/ISO8859/8859-2.TXT - * You can send me such files, and I will integrate them into the - * distribution (if possible). - * - I really do not know very much about the character sets used in - * East Asia. If you need them, please write the necessary conversion - * functions and send them to me. - * - * KNOWN PROBLEMS: - * - The following charsets do not have a bijective mapping to Unicode: - * adobe_standard_encoding, adobe_symbol_encoding, - * adobe_zapf_dingbats_encoding, cp1002 (0xFEBE). The current implementation - * simply removes one of the conflicting code point pairs - this might - * not what you want. - *) - -type encoding = - [ `Enc_utf8 (* UTF-8 *) - | `Enc_java (* The variant of UTF-8 used by Java *) - | `Enc_utf16 (* UTF-16 with unspecified endianess (restricted usage) *) - | `Enc_utf16_le (* UTF-16 little endian *) - | `Enc_utf16_be (* UTF-16 big endian *) - | `Enc_usascii (* US-ASCII (only 7 bit) *) - | `Enc_iso88591 (* ISO-8859-1 *) - | `Enc_iso88592 (* ISO-8859-2 *) - | `Enc_iso88593 (* ISO-8859-3 *) - | `Enc_iso88594 (* ISO-8859-4 *) - | `Enc_iso88595 (* ISO-8859-5 *) - | `Enc_iso88596 (* ISO-8859-6 *) - | `Enc_iso88597 (* ISO-8859-7 *) - | `Enc_iso88598 (* ISO-8859-8 *) - | `Enc_iso88599 (* ISO-8859-9 *) - | `Enc_iso885910 (* ISO-8859-10 *) - | `Enc_iso885913 (* ISO-8859-13 *) - | `Enc_iso885914 (* ISO-8859-14 *) - | `Enc_iso885915 (* ISO-8859-15 *) - | `Enc_koi8r (* KOI8-R *) - | `Enc_jis0201 (* JIS-0201 *) - (* Microsoft: *) - | `Enc_windows1250 (* WINDOWS-1250 *) - | `Enc_windows1251 (* WINDOWS-1251 *) - | `Enc_windows1252 (* WINDOWS-1252 *) - | `Enc_windows1253 (* WINDOWS-1253 *) - | `Enc_windows1254 (* WINDOWS-1254 *) - | `Enc_windows1255 (* WINDOWS-1255 *) - | `Enc_windows1256 (* WINDOWS-1256 *) - | `Enc_windows1257 (* WINDOWS-1257 *) - | `Enc_windows1258 (* WINDOWS-1258 *) - (* IBM, ASCII-based: *) - | `Enc_cp437 - | `Enc_cp737 - | `Enc_cp775 - | `Enc_cp850 - | `Enc_cp852 - | `Enc_cp855 - | `Enc_cp856 - | `Enc_cp857 - | `Enc_cp860 - | `Enc_cp861 - | `Enc_cp862 - | `Enc_cp863 - | `Enc_cp864 - | `Enc_cp865 - | `Enc_cp866 - | `Enc_cp869 - | `Enc_cp874 - | `Enc_cp1006 - (* IBM, EBCDIC-based: *) - | `Enc_cp037 - | `Enc_cp424 - | `Enc_cp500 - | `Enc_cp875 - | `Enc_cp1026 - (* Adobe: *) - | `Enc_adobe_standard_encoding - | `Enc_adobe_symbol_encoding - | `Enc_adobe_zapf_dingbats_encoding - (* Apple: *) - | `Enc_macroman - - ] - - -val encoding_of_string : string -> encoding;; - (* Returns the encoding of the name of the encoding. Fails if the - * encoding is unknown. - * E.g. encoding_of_string "iso-8859-1" = `Enc_iso88591 - *) - -val string_of_encoding : encoding -> string;; - (* Returns the name of the encoding. *) - - -val makechar : encoding -> int -> string - (* makechar enc i: - * Creates the string representing the code point i in encoding enc. - * Raises Not_found if the character is legal but cannot be represented - * in enc. - * - * Possible encodings: everything but `Enc_utf16. - *) - -val recode : in_enc:encoding -> - in_buf:string -> - in_pos:int -> - in_len:int -> - out_enc:encoding -> - out_buf:string -> - out_pos:int -> - out_len:int -> - max_chars:int -> - subst:(int -> string) -> (int * int * encoding) - (* - * let (in_n, out_n, in_enc') = - * recode in_enc in_buf in_len out_enc out_buf out_pos out_len max_chars - * subst: - * Converts the character sequence contained in the at most in_len bytes - * of in_buf starting at position in_pos, and writes the result - * into at most out_len bytes of out_buf starting at out_pos. - * At most max_chars are written into out_buf. - * The characters in in_buf are assumed to be encoded as in_enc, and the - * characters in out_buf will be encoded as out_enc. - * If there is a code point which cannot be represented in out_enc, - * the function subst is called with the code point as argument, and the - * resulting string (which must already be encoded as out_enc) is - * inserted instead. - * Note: It is possible that subst is called several times for the same - * character. - * Return value: out_n is the actual number of bytes written into out_buf. - * in_n is the actual number of bytes that have been converted from - * in_buf; in_n may be smaller than in_len because of incomplete - * multi-byte characters, or because the output buffer has less space - * for characters than the input buffer, or because of a change - * of the encoding variant. - * If there is at least one complete character in in_buf, and at least - * space for one complete character in out_buf, and max_chars >= 1, it is - * guaranteed that in_n > 0 or out_n > 0. - * in_enc' is normally identical to in_enc. However, there are cases - * in which the encoding can be refined when looking at the byte - * sequence; for example whether a little endian or big endian variant - * of the encoding is used. in_enc' is the variant of in_enc that was - * used for the last character that has been converted. - * - * NOTES: - * - * Supported range of code points: 0 to 0xd7ff, 0xe000 to 0xfffd, - * 0x10000 to 0x10ffff. - * - * Enc_utf8: Malformed UTF-8 byte sequences are always rejected. This - * is also true for the sequence 0xc0 0x80 which is used by some software - * (Java) as paraphrase for the code point 0. - * - * Enc_utf16: When reading from a string encoded as Enc_utf16, a byte - * order mark is expected at the beginning. The detected variant - * (Enc_utf16_le or Enc_utf16_be) is returned. The byte order mark is - * not included into the output string. - It is not possible to - * write as Enc_utf16. - * - * Enc_utf16_le, Enc_utf16_be: When reading from such a string, the - * code point 0xfeff is returned as it is; it is a "zero-width - * non-breaking space". The code point 0xfffe is rejected. - * - * Surrogate pairs: These are recognized (or written) only for a - * UTF-16 encoding; and rejected for any other encoding. - * - * Rejected byte sequences cause the exception Bad_character_stream. - *) - -val recode_string : in_enc:encoding -> - out_enc:encoding -> - ?subst:(int -> string) -> - string -> - string - (* Recodes a complete string from in_enc to out_enc, and returns it. - * The function subst is invoked for code points of in_enc that cannot - * be represented in out_enc, and the result of the function invocation - * is substituted. - * If subst is missing, Not_found is raised in this case. - *) - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:28 lpadovan - * Initial revision - * - * Revision 1.1 2000/08/13 00:02:57 gerd - * Initial revision. - * - * - * ====================================================================== - * OLD LOGS FROM THE PXP PACKAGE (FILE NAME pxp_encoding.mli): - * - * Revision 1.4 2000/07/04 22:05:58 gerd - * Enhanced version of 'recode'. Labeled arguments. - * New function 'recode_string'. - * - * Revision 1.3 2000/05/29 23:48:38 gerd - * Changed module names: - * Markup_aux into Pxp_aux - * Markup_codewriter into Pxp_codewriter - * Markup_document into Pxp_document - * Markup_dtd into Pxp_dtd - * Markup_entity into Pxp_entity - * Markup_lexer_types into Pxp_lexer_types - * Markup_reader into Pxp_reader - * Markup_types into Pxp_types - * Markup_yacc into Pxp_yacc - * See directory "compatibility" for (almost) compatible wrappers emulating - * Markup_document, Markup_dtd, Markup_reader, Markup_types, and Markup_yacc. - * - * Revision 1.2 2000/05/29 21:14:57 gerd - * Changed the type 'encoding' into a polymorphic variant. - * - * Revision 1.1 2000/05/20 20:30:50 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/netencoding.ml b/helm/DEVEL/pxp/netstring/netencoding.ml deleted file mode 100644 index e87c4c397..000000000 --- a/helm/DEVEL/pxp/netstring/netencoding.ml +++ /dev/null @@ -1,903 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - - -module Str = Netstring_str;; - -module Base64 = struct - let b64_pattern plus slash = - [| 'A'; 'B'; 'C'; 'D'; 'E'; 'F'; 'G'; 'H'; 'I'; 'J'; 'K'; 'L'; 'M'; - 'N'; 'O'; 'P'; 'Q'; 'R'; 'S'; 'T'; 'U'; 'V'; 'W'; 'X'; 'Y'; 'Z'; - 'a'; 'b'; 'c'; 'd'; 'e'; 'f'; 'g'; 'h'; 'i'; 'j'; 'k'; 'l'; 'm'; - 'n'; 'o'; 'p'; 'q'; 'r'; 's'; 't'; 'u'; 'v'; 'w'; 'x'; 'y'; 'z'; - '0'; '1'; '2'; '3'; '4'; '5'; '6'; '7'; '8'; '9'; plus; slash |];; - - - let rfc_pattern = b64_pattern '+' '/';; - let url_pattern = b64_pattern '-' '/';; - - let encode_with_options b64 equal s pos len linelen crlf = - (* encode using "base64". - * 'b64': The encoding table, created by b64_pattern. - * 'equal': The character that should be used instead of '=' in the original - * encoding scheme. Pass '=' to get the original encoding scheme. - * s, pos, len, linelen: See the interface description of encode_substring. - *) - assert (Array.length b64 = 64); - if len < 0 or pos < 0 or pos > String.length s or linelen < 0 then - invalid_arg "Netencoding.Base64.encode_with_options"; - if pos + len > String.length s then - invalid_arg "Netencoding.Base64.encode_with_options"; - - let linelen = - (linelen/4) * 4 in - - let l_t = if len = 0 then 0 else ((len - 1) / 3 + 1) * 4 in - (* l_t: length of the result without additional line endings *) - - let l_t' = - if linelen < 4 then - l_t - else - if l_t = 0 then 0 else - let n_lines = ((l_t - 1) / linelen) + 1 in - l_t + n_lines * (if crlf then 2 else 1) - in - (* l_t': length of the result with CRLF or LF characters *) - - let t = String.make l_t' equal in - let j = ref 0 in - let q = ref 0 in - for k = 0 to len / 3 - 1 do - let p = pos + 3*k in - (* p >= pos >= 0: this is evident - * p+2 < pos+len <= String.length s: - * Because k <= len/3-1 - * 3*k <= 3*(len/3-1) = len - 3 - * pos+3*k+2 <= pos + len - 3 + 2 = pos + len - 1 < pos + len - * So it is proved that the following unsafe string accesses always - * work. - *) - let bits = (Char.code (String.unsafe_get s (p)) lsl 16) lor - (Char.code (String.unsafe_get s (p+1)) lsl 8) lor - (Char.code (String.unsafe_get s (p+2))) in - (* Obviously, 'bits' is a 24 bit entity (i.e. bits < 2**24) *) - assert(!j + 3 < l_t'); - String.unsafe_set t !j (Array.unsafe_get b64 ( bits lsr 18)); - String.unsafe_set t (!j+1) (Array.unsafe_get b64 ((bits lsr 12) land 63)); - String.unsafe_set t (!j+2) (Array.unsafe_get b64 ((bits lsr 6) land 63)); - String.unsafe_set t (!j+3) (Array.unsafe_get b64 ( bits land 63)); - j := !j + 4; - if linelen > 3 then begin - q := !q + 4; - if !q + 4 > linelen then begin - (* The next 4 characters won't fit on the current line. So insert - * a line ending. - *) - if crlf then begin - t.[ !j ] <- '\013'; - t.[ !j+1 ] <- '\010'; - j := !j + 2; - end - else begin - t.[ !j ] <- '\010'; - incr j - end; - q := 0; - end; - end; - done; - (* padding if needed: *) - let m = len mod 3 in - begin - match m with - 0 -> () - | 1 -> - let bits = Char.code (s.[pos + len - 1]) in - t.[ !j ] <- b64.( bits lsr 2); - t.[ !j + 1 ] <- b64.( (bits land 0x03) lsl 4); - j := !j + 4; - q := !q + 4; - | 2 -> - let bits = (Char.code (s.[pos + len - 2]) lsl 8) lor - (Char.code (s.[pos + len - 1])) in - t.[ !j ] <- b64.( bits lsr 10); - t.[ !j + 1 ] <- b64.((bits lsr 4) land 0x3f); - t.[ !j + 2 ] <- b64.((bits lsl 2) land 0x3f); - j := !j + 4; - q := !q + 4; - | _ -> assert false - end; - - (* If required, add another line end: *) - - if linelen > 3 & !q > 0 then begin - if crlf then begin - t.[ !j ] <- '\013'; - t.[ !j+1 ] <- '\010'; - j := !j + 2; - end - else begin - t.[ !j ] <- '\010'; - incr j - end; - end; - - t ;; - - - - let encode ?(pos=0) ?len ?(linelength=0) ?(crlf=false) s = - let l = match len with None -> String.length s - pos | Some x -> x in - encode_with_options rfc_pattern '=' s pos l linelength crlf;; - - - let encode_substring s ~pos ~len ~linelength ~crlf = - encode_with_options rfc_pattern '=' s pos len linelength crlf;; - - - let url_encode ?(pos=0) ?len ?(linelength=0) ?(crlf=false) s = - let l = match len with None -> String.length s - pos | Some x -> x in - encode_with_options url_pattern '.' s pos l linelength crlf;; - - - let decode_substring t ~pos ~len ~url_variant:p_url ~accept_spaces:p_spaces = - if len < 0 or pos < 0 or pos > String.length t then - invalid_arg "Netencoding.Base64.decode_substring"; - if pos + len > String.length t then - invalid_arg "Netencoding.Base64.decode_substring"; - - (* Compute the number of effective characters l_t in 't'; - * pad_chars: number of '=' characters at the end of the string. - *) - let l_t, pad_chars = - if p_spaces then begin - (* Count all non-whitespace characters: *) - let c = ref 0 in - let p = ref 0 in - for i = pos to pos + len - 1 do - match String.unsafe_get t i with - (' '|'\t'|'\r'|'\n') -> () - | ('='|'.') as ch -> - if ch = '.' & not p_url then - invalid_arg "Netencoding.Base64.decode_substring"; - incr c; - incr p; - if !p > 2 then - invalid_arg "Netencoding.Base64.decode_substring"; - for j = i+1 to pos + len - 1 do - match String.unsafe_get t j with - (' '|'\t'|'\r'|'\n'|'.'|'=') -> () - | _ -> - (* Only another '=' or spaces allowed *) - invalid_arg "Netencoding.Base64.decode_substring"; - done - | _ -> incr c - done; - if !c mod 4 <> 0 then - invalid_arg "Netencoding.Base64.decode_substring"; - !c, !p - end - else - len, - ( if len mod 4 <> 0 then - invalid_arg "Netencoding.Base64.decode_substring"; - if len > 0 then ( - if String.sub t (len - 2) 2 = "==" or - (p_url & String.sub t (len - 2) 2 = "..") then 2 - else - if String.sub t (len - 1) 1 = "=" or - (p_url & String.sub t (len - 1) 1 = ".") then 1 - else - 0 - ) - else 0 - ) - in - - let l_s = (l_t / 4) * 3 - pad_chars in (* sic! *) - let s = String.create l_s in - - let decode_char c = - match c with - 'A' .. 'Z' -> Char.code(c) - 65 (* 65 = Char.code 'A' *) - | 'a' .. 'z' -> Char.code(c) - 71 (* 71 = Char.code 'a' - 26 *) - | '0' .. '9' -> Char.code(c) + 4 (* -4 = Char.code '0' - 52 *) - | '+' -> 62 - | '-' -> if not p_url then - invalid_arg "Netencoding.Base64.decode_substring"; - 62 - | '/' -> 63 - | _ -> invalid_arg "Netencoding.Base64.decode_substring"; - in - - (* Decode all but the last quartet: *) - - let cursor = ref pos in - let rec next_char() = - match t.[ !cursor ] with - (' '|'\t'|'\r'|'\n') -> - if p_spaces then (incr cursor; next_char()) - else invalid_arg "Netencoding.Base64.decode_substring" - | c -> - incr cursor; c - in - - if p_spaces then begin - for k = 0 to l_t / 4 - 2 do - let q = 3*k in - let c0 = next_char() in - let c1 = next_char() in - let c2 = next_char() in - let c3 = next_char() in - let n0 = decode_char c0 in - let n1 = decode_char c1 in - let n2 = decode_char c2 in - let n3 = decode_char c3 in - let x0 = (n0 lsl 2) lor (n1 lsr 4) in - let x1 = ((n1 lsl 4) land 0xf0) lor (n2 lsr 2) in - let x2 = ((n2 lsl 6) land 0xc0) lor n3 in - String.unsafe_set s q (Char.chr x0); - String.unsafe_set s (q+1) (Char.chr x1); - String.unsafe_set s (q+2) (Char.chr x2); - done; - end - else begin - (* Much faster: *) - for k = 0 to l_t / 4 - 2 do - let p = pos + 4*k in - let q = 3*k in - let c0 = String.unsafe_get t p in - let c1 = String.unsafe_get t (p + 1) in - let c2 = String.unsafe_get t (p + 2) in - let c3 = String.unsafe_get t (p + 3) in - let n0 = decode_char c0 in - let n1 = decode_char c1 in - let n2 = decode_char c2 in - let n3 = decode_char c3 in - let x0 = (n0 lsl 2) lor (n1 lsr 4) in - let x1 = ((n1 lsl 4) land 0xf0) lor (n2 lsr 2) in - let x2 = ((n2 lsl 6) land 0xc0) lor n3 in - String.unsafe_set s q (Char.chr x0); - String.unsafe_set s (q+1) (Char.chr x1); - String.unsafe_set s (q+2) (Char.chr x2); - done; - cursor := pos + l_t - 4; - end; - - (* Decode the last quartet: *) - - if l_t > 0 then begin - let q = 3*(l_t / 4 - 1) in - let c0 = next_char() in - let c1 = next_char() in - let c2 = next_char() in - let c3 = next_char() in - - if (c2 = '=' & c3 = '=') or (p_url & c2 = '.' & c3 = '.') then begin - let n0 = decode_char c0 in - let n1 = decode_char c1 in - let x0 = (n0 lsl 2) lor (n1 lsr 4) in - s.[ q ] <- Char.chr x0; - end - else - if (c3 = '=') or (p_url & c3 = '.') then begin - let n0 = decode_char c0 in - let n1 = decode_char c1 in - let n2 = decode_char c2 in - let x0 = (n0 lsl 2) lor (n1 lsr 4) in - let x1 = ((n1 lsl 4) land 0xf0) lor (n2 lsr 2) in - s.[ q ] <- Char.chr x0; - s.[ q+1 ] <- Char.chr x1; - end - else begin - let n0 = decode_char c0 in - let n1 = decode_char c1 in - let n2 = decode_char c2 in - let n3 = decode_char c3 in - let x0 = (n0 lsl 2) lor (n1 lsr 4) in - let x1 = ((n1 lsl 4) land 0xf0) lor (n2 lsr 2) in - let x2 = ((n2 lsl 6) land 0xc0) lor n3 in - s.[ q ] <- Char.chr x0; - s.[ q+1 ] <- Char.chr x1; - s.[ q+2 ] <- Char.chr x2; - end - - end; - - s ;; - - - - let decode ?(pos=0) ?len ?(url_variant=true) ?(accept_spaces=false) s = - let l = match len with None -> String.length s - pos | Some x -> x in - decode_substring s pos l url_variant accept_spaces;; - - let decode_ignore_spaces s = - decode_substring s 0 (String.length s) true true;; - - -end - - - -module QuotedPrintable = struct - - let encode_substring s ~pos ~len = - - if len < 0 or pos < 0 or pos > String.length s then - invalid_arg "Netencoding.QuotedPrintable.encode_substring"; - if pos + len > String.length s then - invalid_arg "Netencoding.QuotedPrintable.encode_substring"; - - let rec count n i = - if i < len then - match String.unsafe_get s (pos+i) with - ('\r'|'\n') -> - count (n+1) (i+1) - | ('\000'..'\031'|'\127'..'\255'| - '!'|'"'|'#'|'$'|'@'|'['|']'|'^'|'\''|'{'|'|'|'}'|'~'|'=') -> - count (n+3) (i+1) - | ' ' -> - (* Protect spaces only if they occur at the end of a line *) - if i+1 < len then - match s.[pos+i+1] with - ('\r'|'\n') -> - count (n+3) (i+1) - | _ -> - count (n+1) (i+1) - else - count (n+3) (i+1) - | _ -> - count (n+1) (i+1) - else - n - in - - let l = count 0 0 in - let t = String.create l in - - let hexdigit = - [| '0'; '1'; '2'; '3'; '4'; '5'; '6'; '7'; - '8'; '9'; 'A'; 'B'; 'C'; 'D'; 'E'; 'F'; |] in - - let k = ref 0 in - - let add_quoted c = - t.[ !k ] <- '='; - t.[ !k+1 ] <- hexdigit.( Char.code c lsr 4 ); - t.[ !k+2 ] <- hexdigit.( Char.code c land 15 ) - in - - for i = 0 to len - 1 do - match String.unsafe_get s i with - ('\r'|'\n') as c -> - String.unsafe_set t !k c; - incr k - | ('\000'..'\031'|'\127'..'\255'| - '!'|'"'|'#'|'$'|'@'|'['|']'|'^'|'\''|'{'|'|'|'}'|'~'|'=') as c -> - add_quoted c; - k := !k + 3 - | ' ' -> - (* Protect spaces only if they occur at the end of a line *) - if i+1 < len then - match s.[pos+i+1] with - ('\r'|'\n') -> - add_quoted ' '; - k := !k + 3; - | _ -> - String.unsafe_set t !k ' '; - incr k - else begin - add_quoted ' '; - k := !k + 3; - end - | c -> - String.unsafe_set t !k c; - incr k - done; - - t ;; - - - let encode ?(pos=0) ?len s = - let l = match len with None -> String.length s - pos | Some x -> x in - encode_substring s pos l;; - - - - let decode_substring s ~pos ~len = - - if len < 0 or pos < 0 or pos > String.length s then - invalid_arg "Netencoding.QuotedPrintable.decode_substring"; - if pos + len > String.length s then - invalid_arg "Netencoding.QuotedPrintable.decode_substring"; - - let decode_hex c = - match c with - '0'..'9' -> Char.code c - 48 - | 'A'..'F' -> Char.code c - 55 - | 'a'..'f' -> Char.code c - 87 - | _ -> - invalid_arg "Netencoding.QuotedPrintable.decode_substring"; - in - - let rec count n i = - if i < len then - match String.unsafe_get s (pos+i) with - '=' -> - if i+1 = len then - (* A '=' at EOF is ignored *) - count n (i+1) - else - if i+1 < len then - match s.[pos+i+1] with - '\r' -> - (* Official soft break *) - if i+2 < len & s.[pos+i+2] = '\n' then - count n (i+3) - else - count n (i+2) - | '\n' -> - (* Inofficial soft break *) - count n (i+2) - | _ -> - if i+2 >= len then - invalid_arg - "Netencoding.QuotedPrintable.decode_substring"; - let _ = decode_hex s.[pos+i+1] in - let _ = decode_hex s.[pos+i+2] in - count (n+1) (i+3) - else - invalid_arg "Netencoding.QuotedPrintable.decode_substring" - | _ -> - count (n+1) (i+1) - else - n - in - - let l = count 0 0 in - let t = String.create l in - let k = ref pos in - let e = pos + len in - let i = ref 0 in - - while !i < l do - match String.unsafe_get s !k with - '=' -> - if !k+1 = e then - (* A '=' at EOF is ignored *) - () - else - if !k+1 < e then - match s.[!k+1] with - '\r' -> - (* Official soft break *) - if !k+2 < e & s.[!k+2] = '\n' then - k := !k + 3 - else - k := !k + 2 - | '\n' -> - (* Inofficial soft break *) - k := !k + 2 - | _ -> - if !k+2 >= e then - invalid_arg - "Netencoding.QuotedPrintable.decode_substring"; - let x1 = decode_hex s.[!k+1] in - let x2 = decode_hex s.[!k+2] in - t.[ !i ] <- Char.chr ((x1 lsl 4) lor x2); - k := !k + 3; - incr i - else - invalid_arg "Netencoding.QuotedPrintable.decode_substring" - | c -> - String.unsafe_set t !i c; - incr k; - incr i - done; - - t ;; - - - let decode ?(pos=0) ?len s = - let l = match len with None -> String.length s - pos | Some x -> x in - decode_substring s pos l;; - -end - - -module Q = struct - - let encode_substring s ~pos ~len = - - if len < 0 or pos < 0 or pos > String.length s then - invalid_arg "Netencoding.Q.encode_substring"; - if pos + len > String.length s then - invalid_arg "Netencoding.Q.encode_substring"; - - let rec count n i = - if i < len then - match String.unsafe_get s (pos+i) with - | ('A'..'Z'|'a'..'z'|'0'..'9') -> - count (n+1) (i+1) - | _ -> - count (n+3) (i+1) - else - n - in - - let l = count 0 0 in - let t = String.create l in - - let hexdigit = - [| '0'; '1'; '2'; '3'; '4'; '5'; '6'; '7'; - '8'; '9'; 'A'; 'B'; 'C'; 'D'; 'E'; 'F'; |] in - - let k = ref 0 in - - let add_quoted c = - t.[ !k ] <- '='; - t.[ !k+1 ] <- hexdigit.( Char.code c lsr 4 ); - t.[ !k+2 ] <- hexdigit.( Char.code c land 15 ) - in - - for i = 0 to len - 1 do - match String.unsafe_get s i with - | ('A'..'Z'|'a'..'z'|'0'..'9') as c -> - String.unsafe_set t !k c; - incr k - | c -> - add_quoted c; - k := !k + 3 - done; - - t ;; - - - let encode ?(pos=0) ?len s = - let l = match len with None -> String.length s - pos | Some x -> x in - encode_substring s pos l;; - - - - let decode_substring s ~pos ~len = - - if len < 0 or pos < 0 or pos > String.length s then - invalid_arg "Netencoding.Q.decode_substring"; - if pos + len > String.length s then - invalid_arg "Netencoding.Q.decode_substring"; - - let decode_hex c = - match c with - '0'..'9' -> Char.code c - 48 - | 'A'..'F' -> Char.code c - 55 - | 'a'..'f' -> Char.code c - 87 - | _ -> - invalid_arg "Netencoding.Q.decode_substring"; - in - - let rec count n i = - if i < len then - match String.unsafe_get s (pos+i) with - '=' -> - if i+2 >= len then - invalid_arg "Netencoding.Q.decode_substring"; - let _ = decode_hex s.[pos+i+1] in - let _ = decode_hex s.[pos+i+2] in - count (n+1) (i+3) - | _ -> (* including '_' *) - count (n+1) (i+1) - else - n - in - - let l = count 0 0 in - let t = String.create l in - let k = ref pos in - let e = pos + len in - let i = ref 0 in - - while !i < l do - match String.unsafe_get s !k with - '=' -> - if !k+2 >= e then - invalid_arg "Netencoding.Q.decode_substring"; - let x1 = decode_hex s.[!k+1] in - let x2 = decode_hex s.[!k+2] in - t.[ !i ] <- Char.chr ((x1 lsl 4) lor x2); - k := !k + 3; - incr i - | '_' -> - String.unsafe_set t !i ' '; - incr k; - incr i - | c -> - String.unsafe_set t !i c; - incr k; - incr i - done; - - t ;; - - - let decode ?(pos=0) ?len s = - let l = match len with None -> String.length s - pos | Some x -> x in - decode_substring s pos l ;; - -end - - -module Url = struct - let hex_digits = - [| '0'; '1'; '2'; '3'; '4'; '5'; '6'; '7'; - '8'; '9'; 'A'; 'B'; 'C'; 'D'; 'E'; 'F' |];; - - let to_hex2 k = - (* Converts k to a 2-digit hex string *) - let s = String.create 2 in - s.[0] <- hex_digits.( (k lsr 4) land 15 ); - s.[1] <- hex_digits.( k land 15 ); - s ;; - - - let of_hex1 c = - match c with - ('0'..'9') -> Char.code c - Char.code '0' - | ('A'..'F') -> Char.code c - Char.code 'A' + 10 - | ('a'..'f') -> Char.code c - Char.code 'a' + 10 - | _ -> - raise Not_found ;; - - - - let url_encoding_re = - Str.regexp "[^A-Za-z0-9$_.!*'(),-]";; - - let url_decoding_re = - Str.regexp "\\+\\|%..\\|%.\\|%";; - - - let encode s = - Str.global_substitute - url_encoding_re - (fun r _ -> - match Str.matched_string r s with - " " -> "+" - | x -> - let k = Char.code(x.[0]) in - "%" ^ to_hex2 k - ) - s ;; - - - let decode s = - let l = String.length s in - Str.global_substitute - url_decoding_re - (fun r _ -> - match Str.matched_string r s with - | "+" -> " " - | _ -> - let i = Str.match_beginning r in - (* Assertion: s.[i] = '%' *) - if i+2 >= l then failwith "Cgi.decode"; - let c1 = s.[i+1] in - let c2 = s.[i+2] in - begin - try - let k1 = of_hex1 c1 in - let k2 = of_hex1 c2 in - String.make 1 (Char.chr((k1 lsl 4) lor k2)) - with - Not_found -> - failwith "Cgi.decode" - end - ) - s ;; - -end - - -module Html = struct - - let eref_re = - Str.regexp - "&\\(#\\([0-9]+\\);\\|\\([a-zA-Z]+\\);\\)" ;; - let unsafe_re = Str.regexp "[<>&\"\000-\008\011-\012\014-\031\127-\255]" ;; - - let etable = - [ "lt", "<"; - "gt", ">"; - "amp", "&"; - "quot", "\""; - (* Note: " is new in HTML-4.0, but it has been widely used - * much earlier. - *) - "nbsp", "\160"; - "iexcl", "\161"; - "cent", "\162"; - "pound", "\163"; - "curren", "\164"; - "yen", "\165"; - "brvbar", "\166"; - "sect", "\167"; - "uml", "\168"; - "copy", "\169"; - "ordf", "\170"; - "laquo", "\171"; - "not", "\172"; - "shy", "\173"; - "reg", "\174"; - "macr", "\175"; - "deg", "\176"; - "plusmn", "\177"; - "sup2", "\178"; - "sup3", "\179"; - "acute", "\180"; - "micro", "\181"; - "para", "\182"; - "middot", "\183"; - "cedil", "\184"; - "sup1", "\185"; - "ordm", "\186"; - "raquo", "\187"; - "frac14", "\188"; - "frac12", "\189"; - "frac34", "\190"; - "iquest", "\191"; - "Agrave", "\192"; - "Aacute", "\193"; - "Acirc", "\194"; - "Atilde", "\195"; - "Auml", "\196"; - "Aring", "\197"; - "AElig", "\198"; - "Ccedil", "\199"; - "Egrave", "\200"; - "Eacute", "\201"; - "Ecirc", "\202"; - "Euml", "\203"; - "Igrave", "\204"; - "Iacute", "\205"; - "Icirc", "\206"; - "Iuml", "\207"; - "ETH", "\208"; - "Ntilde", "\209"; - "Ograve", "\210"; - "Oacute", "\211"; - "Ocirc", "\212"; - "Otilde", "\213"; - "Ouml", "\214"; - "times", "\215"; - "Oslash", "\216"; - "Ugrave", "\217"; - "Uacute", "\218"; - "Ucirc", "\219"; - "Uuml", "\220"; - "Yacute", "\221"; - "THORN", "\222"; - "szlig", "\223"; - "agrave", "\224"; - "aacute", "\225"; - "acirc", "\226"; - "atilde", "\227"; - "auml", "\228"; - "aring", "\229"; - "aelig", "\230"; - "ccedil", "\231"; - "egrave", "\232"; - "eacute", "\233"; - "ecirc", "\234"; - "euml", "\235"; - "igrave", "\236"; - "iacute", "\237"; - "icirc", "\238"; - "iuml", "\239"; - "eth", "\240"; - "ntilde", "\241"; - "ograve", "\242"; - "oacute", "\243"; - "ocirc", "\244"; - "otilde", "\245"; - "ouml", "\246"; - "divide", "\247"; - "oslash", "\248"; - "ugrave", "\249"; - "uacute", "\250"; - "ucirc", "\251"; - "uuml", "\252"; - "yacute", "\253"; - "thorn", "\254"; - "yuml", "\255"; - ] ;; - - let quick_etable = - let ht = Hashtbl.create 50 in - List.iter (fun (name,value) -> Hashtbl.add ht name value) etable; - (* Entities to be decoded, but that must not be encoded: *) - Hashtbl.add ht "apos" "'"; (* used in XML documents *) - ht ;; - - let rev_etable = - let a = Array.create 256 "" in - List.iter (fun (name,value) -> - a.(Char.code(value.[0])) <- "&" ^ name ^ ";") etable; - for i = 0 to 8 do - a.(i) <- "&#" ^ string_of_int i ^ ";" - done; - for i = 11 to 12 do - a.(i) <- "&#" ^ string_of_int i ^ ";" - done; - for i = 14 to 31 do - a.(i) <- "&#" ^ string_of_int i ^ ";" - done; - for i = 127 to 159 do - a.(i) <- "&#" ^ string_of_int i ^ ";" - done; - a ;; - - let decode_to_latin1 s = - Str.global_substitute - eref_re - (fun r _ -> - let t = Str.matched_string r s in - try - let n = int_of_string(Str.matched_group r 2 s) in - if n < 256 then - String.make 1 (Char.chr n) - else - t - with - Not_found -> - try - let name = Str.matched_group r 3 s in - try - Hashtbl.find quick_etable name - with - Not_found -> - t - with - Not_found -> assert false - ) - s ;; - - let encode_from_latin1 s = - Str.global_substitute - unsafe_re - (fun r _ -> - let t = Str.matched_string r s in - let i = Char.code (t.[0]) in - rev_etable.(i) - ) - s ;; -end - - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.5 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.4 2000/06/25 21:15:48 gerd - * Checked thread-safety. - * - * Revision 1.3 2000/03/03 17:03:16 gerd - * Q encoding: CR and LF are quoted. - * - * Revision 1.2 2000/03/03 01:08:29 gerd - * Added Netencoding.Html functions. - * - * Revision 1.1 2000/03/02 01:14:48 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/netencoding.mli b/helm/DEVEL/pxp/netstring/netencoding.mli deleted file mode 100644 index 6466572b3..000000000 --- a/helm/DEVEL/pxp/netstring/netencoding.mli +++ /dev/null @@ -1,271 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -(**********************************************************************) -(* Several encodings important for the net *) -(**********************************************************************) - - -(**********************************************************************) -(* Base 64 encoding *) -(**********************************************************************) - -(* See RFC 2045 for a description of Base 64 encoding. *) - -(* THREAD-SAFETY: - * All Base64 functions are reentrant and thus thread-safe. - *) - -module Base64 : sig - - val encode : ?pos:int -> ?len:int -> ?linelength:int -> ?crlf:bool -> - string -> string - (* Compute the "base 64" encoding of the given string argument. - * Note that the result is a string that only contains the characters - * a-z, A-Z, 0-9, +, /, =, and optionally spaces, CR and LF characters. - * - * If pos and/or len are passed, only the substring starting at - * pos (default: 0) with length len (default: rest of the string) - * is encoded. - * - * The result is divided up into lines not longer than 'linelength' - * (without counting the line separator); default: do not divide lines. - * If 'linelength' is smaller than 4, no line division is performed. - * If 'linelength' is not divisible by 4, the produced lines are a - * bit shorter than 'linelength'. - * - * If 'crlf' (default: false) the lines are ended by CRLF; otherwise - * they are only ended by LF. - * (You need the crlf option to produce correct MIME messages.) - * - *) - - val url_encode : ?pos:int -> ?len:int -> ?linelength:int -> ?crlf:bool -> - string -> string - (* Same as 'encode' but use slightly different characters that can be - * part of URLs without additional encodings. - * The encoded string consists only of the characters a-z, A-Z, 0-9, - * -, /, . - * 'url_encode' does NOT implement the Base 64 encoding as described - * in the standard! - *) - - val encode_substring : string -> pos:int -> len:int -> linelength:int -> - crlf:bool -> string - (* *** DEPRECATED FUNCTION *** Use 'encode' instead! *** - * - * encode_substring s pos len linelen crlf: - * Encodes the substring at position 'pos' in 's' with length 'len'. - * The result is divided up into lines not longer than 'linelen' (without - * counting the line separator). - * If 'linelen' is smaller than 4, no line division is performed. - * If 'linelen' is not divisible by 4, the produced lines are a - * bit shorter than 'linelen'. - * If 'crlf' the lines are ended by CRLF; otherwise they are only - * ended by LF. - * (You need the crlf option to produce correct MIME messages.) - *) - - val decode : ?pos:int -> ?len:int -> ?url_variant:bool -> - ?accept_spaces:bool -> string -> string - (* Decodes the given string argument. - * - * If pos and/or len are passed, only the substring starting at - * pos (default: 0) with length len (default: rest of the string) - * is decoded. - * - * If url_variant (default: true) is set, the functions also - * accepts the characters '-' and '.' as produced by 'url_encode'. - * - * If accept_spaces (default: false) is set, the function ignores - * white space contained in the string to decode (otherwise the - * function fails if it finds white space). - *) - - val decode_ignore_spaces : string -> string - (* *** DEPRECATED FUNCTION *** Use 'decode' instead! *** - * - * Decodes the string, too, but it is allowed that the string contains - * whitespace characters. - * This function is slower than 'decode'. - *) - - val decode_substring : string -> pos:int -> len:int -> url_variant:bool -> - accept_spaces:bool -> string - (* *** DEPRECATED FUNCTION *** Use 'decode' instead! *** - * - * decode_substring s pos len url spaces: - * Decodes the substring of 's' beginning at 'pos' with length 'len'. - * If 'url', strings created by 'url_encode' are accepted, too. - * If 'spaces', whitespace characters are allowed in the string. - *) -end - -(**********************************************************************) -(* Quoted printable encoding *) -(**********************************************************************) - -(* See RFC 2045. - * This implementation assumes that the encoded string has a text MIME - * type. Because of this, the characters CR and LF are never protected - * by hex tokens; they are copied literally to the output string. - *) - -(* THREAD-SAFETY: - * All QuotedPrintable functions are reentrant and thus thread-safe. - *) - -module QuotedPrintable : - sig - val encode : ?pos:int -> ?len:int -> string -> string - (* Encodes the string and returns it. - * Note line breaks: - * No additional soft line breaks are added. The characters CR - * and LF are not represented as =0D resp. =0A. (But other control - * characters ARE encoded.) - * Note unsafe characters: - * As recommended by RFC 2045, the characters !\"#$@[]^`{|}~ - * are additionally represented as hex tokens. -- " - * - * If pos and/or len are passed, only the substring starting at - * pos (default: 0) with length len (default: rest of the string) - * is encoded. - *) - - val encode_substring : string -> pos:int -> len:int -> string - (* *** DEPRECATED FUNCTION *** Use 'encode' instead! *** - * encode_substring s pos len: - * Encodes the substring of 's' beginning at 'pos' with length 'len'. - *) - - val decode : ?pos:int -> ?len:int -> string -> string - (* Decodes the string and returns it. - * Most format errors cause an Invalid_argument exception. - * Note that soft line breaks can be properly decoded although - * 'encode' will never produce them. - * - * If pos and/or len are passed, only the substring starting at - * pos (default: 0) with length len (default: rest of the string) - * is decoded. - *) - - val decode_substring : string -> pos:int -> len:int -> string - (* *** DEPRECATED FUNCTION *** Use 'decode' instead! *** - * decode_substring s pos len: - * Decodes the substring of 's' beginning at 'pos' with length 'len'. - *) - - end - -(**********************************************************************) -(* Q encoding *) -(**********************************************************************) - -(* See RFC 2047. - * The functions behave similar to those of QuotedPrintable. - *) - -(* THREAD-SAFETY: - * All Q functions are reentrant and thus thread-safe. - *) - -module Q : - sig - val encode : ?pos:int -> ?len:int -> string -> string - (* Note: - * All characters except alphanumeric characters are protected by - * hex tokens. - * In particular, spaces are represented as "=20", not as "_". - *) - - val decode : ?pos:int -> ?len:int -> string -> string - - val encode_substring : string -> pos:int -> len:int -> string - (* *** DEPRECATED FUNCTION *** Use 'encode' instead! *** *) - - val decode_substring : string -> pos:int -> len:int -> string - (* *** DEPRECATED FUNCTION *** Use 'decode' instead! *** *) - end - -(**********************************************************************) -(* B encoding *) -(**********************************************************************) - -(* The B encoding of RFC 2047 is the same as Base64. *) - - -(**********************************************************************) -(* URL-encoding *) -(**********************************************************************) - -(* Encoding/Decoding within URLs: - * - * The following two functions perform the '%'-substitution for - * characters that may otherwise be interpreted as metacharacters. - * - * According to: RFC 1738, RFC 1630 - *) - -(* THREAD-SAFETY: - * The Url functions are thread-safe. - *) - -module Url : - sig - val decode : string -> string - val encode : string -> string - end - - -(**********************************************************************) -(* HTMLization *) -(**********************************************************************) - -(* Encodes characters that need protection by converting them to - * entity references. E.g. "<" is converted to "<". - * As the entities may be named, there is a dependency on the character - * set. Currently, there are only functions for the Latin 1 alphabet. - *) - -(* THREAD-SAFETY: - * The Html functions are thread-safe. - *) - -module Html : - sig - val encode_from_latin1 : string -> string - (* Encodes the characters 0-8, 11-12, 14-31, '<', '>', '"', '&', - * 127-255. If the characters have a name, a named entity is - * preferred over a numeric entity. - *) - val decode_to_latin1 : string -> string - (* Decodes the string. Unknown named entities are left as they - * are (i.e. decode_to_latin1 "&nonsense;" = "&nonsense;"). - * The same applies to numeric entities greater than 255. - *) - end - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:27 lpadovan - * Initial revision - * - * Revision 1.4 2000/06/25 22:34:43 gerd - * Added labels to arguments. - * - * Revision 1.3 2000/06/25 21:15:48 gerd - * Checked thread-safety. - * - * Revision 1.2 2000/03/03 01:08:29 gerd - * Added Netencoding.Html functions. - * - * Revision 1.1 2000/03/02 01:14:48 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/nethtml.ml b/helm/DEVEL/pxp/netstring/nethtml.ml deleted file mode 100644 index 7f9d983cd..000000000 --- a/helm/DEVEL/pxp/netstring/nethtml.ml +++ /dev/null @@ -1,276 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -open Nethtml_scanner;; - -type document = - Element of (string * (string*string) list * document list) - | Data of string -;; - - -exception End_of_scan;; - - -let no_end_tag = (* empty HTML elements *) - ref - [ "isindex"; - "base"; - "meta"; - "link"; - "hr"; - "input"; - "img"; - "param"; - "basefont"; - "br"; - "area"; - ] -;; - - -let special_tag = (* other lexical rules *) - ref - [ "script"; - "style"; - ] -;; - - -let rec parse_comment buf = - let t = scan_comment buf in - match t with - Mcomment -> - parse_comment buf - | Eof -> - raise End_of_scan - | _ -> - () -;; - - -let rec parse_doctype buf = - let t = scan_doctype buf in - match t with - Mdoctype -> - parse_doctype buf - | Eof -> - raise End_of_scan - | _ -> - () -;; - - -let parse_document buf = - let current_name = ref "" in - let current_atts = ref [] in - let current_subs = ref [] in - let stack = Stack.create() in - - let parse_atts() = - let rec next_no_space() = - match scan_element buf with - Space _ -> next_no_space() - | t -> t - in - - let rec parse_atts_lookahead next = - match next with - Relement -> [] - | Name n -> - begin match next_no_space() with - Is -> - begin match next_no_space() with - Name v -> - (String.lowercase n, String.uppercase v) :: - parse_atts_lookahead (next_no_space()) - | Literal v -> - (String.lowercase n,v) :: - parse_atts_lookahead (next_no_space()) - | Eof -> - raise End_of_scan - | Relement -> - (* Illegal *) - [] - | _ -> - (* Illegal *) - parse_atts_lookahead (next_no_space()) - end - | Eof -> - raise End_of_scan - | Relement -> - (* <==> *) - [ String.lowercase n, String.lowercase n ] - | next' -> - (* assume <==> *) - ( String.lowercase n, String.lowercase n ) :: - parse_atts_lookahead next' - end - | Eof -> - raise End_of_scan - | _ -> - (* Illegal *) - parse_atts_lookahead (next_no_space()) - in - parse_atts_lookahead (next_no_space()) - in - - let rec parse_special name = - (* Parse until *) - match scan_special buf with - Lelementend n -> - if n = name then - "" - else - " - raise End_of_scan - | Cdata s -> - s ^ parse_special name - | _ -> - (* Illegal *) - parse_special name - in - - let rec skip_element() = - (* Skip until ">" *) - match scan_element buf with - Relement -> - () - | Eof -> - raise End_of_scan - | _ -> - skip_element() - in - - let rec parse_next() = - let t = scan_document buf in - match t with - Lcomment -> - parse_comment buf; - parse_next() - | Ldoctype -> - parse_doctype buf; - parse_next() - | Lelement name -> - let name = String.lowercase name in - if List.mem name !no_end_tag then begin - let atts = parse_atts() in - current_subs := (Element(name, atts, [])) :: !current_subs; - parse_next() - end - else if List.mem name !special_tag then begin - let atts = parse_atts() in - let data = parse_special name in - (* Read until ">" *) - skip_element(); - current_subs := (Element(name, atts, [Data data])) :: !current_subs; - parse_next() - end - else begin - let atts = parse_atts() in - Stack.push (!current_name, !current_atts, !current_subs) stack; - current_name := name; - current_atts := atts; - current_subs := []; - parse_next() - end - | Cdata data -> - current_subs := (Data data) :: !current_subs; - parse_next() - | Lelementend name -> - let name = String.lowercase name in - (* Read until ">" *) - skip_element(); - (* Search the element to close on the stack: *) - let found = ref (name = !current_name) in - Stack.iter - (fun (old_name, _, _) -> - if name = old_name then found := true) - stack; - (* If not found, the end tag is wrong. Simply ignore it. *) - if not !found then - parse_next() - else begin - (* Put the current element on to the stack: *) - Stack.push (!current_name, !current_atts, !current_subs) stack; - (* If found: Remove the elements from the stack, and append - * them to the previous element as sub elements - *) - let rec remove() = - let old_name, old_atts, old_subs = Stack.pop stack in - (* or raise Stack.Empty *) - if old_name = name then - old_name, old_atts, old_subs - else - let older_name, older_atts, older_subs = remove() in - older_name, - older_atts, - (Element (old_name, old_atts, List.rev old_subs) :: older_subs) - in - let old_name, old_atts, old_subs = remove() in - (* Remove one more element: the element containing the element - * currently being closed. - *) - let new_name, new_atts, new_subs = Stack.pop stack in - current_name := new_name; - current_atts := new_atts; - current_subs := (Element (old_name, old_atts, List.rev old_subs)) - :: new_subs; - (* Go on *) - parse_next() - end - | Eof -> - raise End_of_scan - | _ -> - parse_next() - in - try - parse_next(); - List.rev !current_subs - with - End_of_scan -> - (* Close all remaining elements: *) - Stack.push (!current_name, !current_atts, !current_subs) stack; - let rec remove() = - let old_name, old_atts, old_subs = Stack.pop stack in - (* or raise Stack.Empty *) - try - let older_name, older_atts, older_subs = remove() in - older_name, - older_atts, - (Element (old_name, old_atts, List.rev old_subs) :: older_subs) - with - Stack.Empty -> - old_name, old_atts, old_subs - in - let name, atts, subs = remove() in - List.rev subs -;; - - -let parse_string s = - let buf = Lexing.from_string s in - parse_document buf -;; - - -let parse_file fd = - let buf = Lexing.from_channel fd in - parse_document buf -;; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:28 lpadovan - * Initial revision - * - * Revision 1.1 2000/03/03 01:07:25 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/netstring/nethtml.mli b/helm/DEVEL/pxp/netstring/nethtml.mli deleted file mode 100644 index d7af381cc..000000000 --- a/helm/DEVEL/pxp/netstring/nethtml.mli +++ /dev/null @@ -1,72 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - - -(* The type 'document' represents parsed HTML documents. - * Element (name, args, subnodes): is an element node for an element of - * type 'name' (i.e. written ...) with arguments 'args' - * and subnodes 'subnodes' (the material within the element). The arguments - * are simply name/value pairs. Entity references (something like %xy;) - * occuring in the values are NOT resolved. - * Arguments without values (e.g. \n"; -print_string "\n"; -print_string "\n"; - -print_string "

POST URL-encoded form

\n"; -print_string "
\n"; -print_string "\n"; -print_string "\n"; -print_string "
\n"; - -print_string "

POST FORM-encoded form

\n"; -print_string "
\n"; -print_string "\n"; -print_string "\n"; -print_string "\n"; -print_string "
\n"; - -print_string "

File upload

\n"; -print_string "
\n"; -print_string "\n"; -print_string "\n"; -print_string "\n"; -print_string "
\n"; - - - -print_string "\n"; - -flush stdout -;; - - diff --git a/helm/DEVEL/pxp/netstring/tests/test_mimestring.ml b/helm/DEVEL/pxp/netstring/tests/test_mimestring.ml deleted file mode 100644 index db5eac930..000000000 --- a/helm/DEVEL/pxp/netstring/tests/test_mimestring.ml +++ /dev/null @@ -1,589 +0,0 @@ -#require "str";; -#directory "..";; -#load "netstring.cma";; - -open Mimestring;; - -(**********************************************************************) -(* scan_structured_value *) -(**********************************************************************) - -let t001() = - let r = scan_structured_value "user@domain.com" [ '@'; '.' ] [] in - r = [ Atom "user"; Special '@'; Atom "domain"; Special '.'; Atom "com" ] -;; - - -let t002() = - let r = scan_structured_value "user @ domain . com" [ '@'; '.' ] [] in - r = [ Atom "user"; Special '@'; Atom "domain"; Special '.'; Atom "com" ] -;; - - -let t003() = - let r = scan_structured_value "user(Do you know him?)@domain.com" [ '@'; '.' ] - [] in - r = [ Atom "user"; Special '@'; Atom "domain"; Special '.'; Atom "com" ] -;; - - -let t004() = - let r = scan_structured_value "user @ domain . com" [ '@'; '.'; ' ' ] [] in - r = [ Atom "user"; Special ' '; Special '@'; Special ' '; Atom "domain"; - Special ' '; Special '.'; Special ' '; Atom "com" ] -;; - - -let t005() = - let r = scan_structured_value "user(Do you know him?)@domain.com" - ['@'; '.'; '('] [] in - r = [ Atom "user"; Special '('; Atom "Do"; Atom "you"; Atom "know"; - Atom "him?)"; Special '@'; Atom "domain"; Special '.'; Atom "com" ] -;; - - -let t006() = - let r = scan_structured_value "\"My.name\"@domain.com" [ '@'; '.' ] [] in - r = [ QString "My.name"; Special '@'; Atom "domain"; Special '.'; - Atom "com" ] -;; - - -let t007() = - let r = scan_structured_value "\"\\\"()@. \"@domain.com" [ '@'; '.' ] [] in - r = [ QString "\"()@. "; Special '@'; Atom "domain"; Special '.'; - Atom "com" ] -;; - - -let t008() = - let r = scan_structured_value "a(b(c(d)e)f)g" [] [] in - r = [ Atom "a"; Atom "g" ] -;; - - -let t009() = - let r = scan_structured_value "a(b(c(d)e)f" [] [] in - r = [ Atom "a" ] -;; - - -let t010() = - let r = scan_structured_value "a(b\\(c\\(d\\)e)f" [] [] in - r = [ Atom "a"; Atom "f" ] -;; - - -let t011() = - let r = scan_structured_value "a(b(c(d)e)f\\" [] [] in - r = [ Atom "a" ] -;; - - -let t012() = - let r = scan_structured_value "\"abc" [] [] in - r = [ QString "abc" ] -;; - - -let t013() = - let r = scan_structured_value "\"abc\\" [] [] in - r = [ QString "abc\\" ] -;; - - -(* New tests for netstring-0.9: *) - -let t020() = - let r = scan_structured_value "user(Do you know him?)@domain.com" - [ '@'; '.' ] [ Return_comments ] in - r = [ Atom "user"; Comment; Special '@'; Atom "domain"; Special '.'; - Atom "com" ] -;; - -let t021() = - let r = scan_structured_value "user (Do you know him?) @ domain . com" - [ '@'; '.'; ' ' ] [] in - r = [ Atom "user"; Special ' '; Special ' '; Special ' '; Special '@'; - Special ' '; Atom "domain"; - Special ' '; Special '.'; Special ' '; Atom "com" ] -;; - -let t022() = - let r = scan_structured_value "user (Do you know him?) @ domain . com" - [ '@'; '.'; ' ' ] [ Return_comments ] in - r = [ Atom "user"; Special ' '; Comment; Special ' '; Special '@'; - Special ' '; Atom "domain"; - Special ' '; Special '.'; Special ' '; Atom "com" ] -;; - -let t023() = - let r = scan_structured_value "=?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?=" - [] [] in - r = [ Atom "=?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?=" ] -;; - -let t024() = - let r = scan_structured_value "=?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?=" - [ ] [ Recognize_encoded_words ] in - r = [ EncodedWord("ISO-8859-1", "Q", "Keld_J=F8rn_Simonsen") ] -;; - -let t025() = - let r = scan_structured_value - "=?ISO-8859-1?B?SWYgeW91IGNhbiByZWFkIHRoaXMgeW8=?= =?ISO-8859-2?B?dSB1bmRlcnN0YW5kIHRoZSBleGFtcGxlLg==?=" - [] - [ Recognize_encoded_words ] in - r = [ EncodedWord - ("ISO-8859-1", "B", "SWYgeW91IGNhbiByZWFkIHRoaXMgeW8="); - EncodedWord - ("ISO-8859-2", "B", "dSB1bmRlcnN0YW5kIHRoZSBleGFtcGxlLg==") - ] -;; - -(**********************************************************************) -(* s_extended_token *) -(**********************************************************************) - -let scan specials options str = - let scn = create_mime_scanner specials options str in - scan_token_list scn;; - -let t100() = - let r = scan [] [] "Two atoms" in - match r with - [ a1, Atom "Two"; a2, Atom "atoms" ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 3) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 4) && - (get_line a2 = 1) && - (get_column a2 = 4) && - (get_length a2 = 5) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - - -let t101() = - let r = scan [] [] " Two atoms " in - match r with - [ a1, Atom "Two"; a2, Atom "atoms" ] -> - - (get_pos a1 = 2) && - (get_line a1 = 1) && - (get_column a1 = 2) && - (get_length a1 = 3) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 7) && - (get_line a2 = 1) && - (get_column a2 = 7) && - (get_length a2 = 5) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - - -let t102() = - let r = scan [] [] " Two\n atoms " in - match r with - [ a1, Atom "Two"; a2, Atom "atoms" ] -> - - (get_pos a1 = 2) && - (get_line a1 = 1) && - (get_column a1 = 2) && - (get_length a1 = 3) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 7) && - (get_line a2 = 2) && - (get_column a2 = 1) && - (get_length a2 = 5) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t110() = - let r = scan [] [] "\"Two\" \"qstrings\"" in - match r with - [ a1, QString "Two"; a2, QString "qstrings" ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 5) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 6) && - (get_line a2 = 1) && - (get_column a2 = 6) && - (get_length a2 = 10) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t111() = - let r = scan [] [] " \"Two\" \"qstrings\" " in - match r with - [ a1, QString "Two"; a2, QString "qstrings" ] -> - - (get_pos a1 = 2) && - (get_line a1 = 1) && - (get_column a1 = 2) && - (get_length a1 = 5) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 9) && - (get_line a2 = 1) && - (get_column a2 = 9) && - (get_length a2 = 10) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t112() = - let r = scan [] [] " \"Two\nlines\" \"and\nqstrings\" " in - match r with - [ a1, QString "Two\nlines"; a2, QString "and\nqstrings" ] -> - - (get_pos a1 = 2) && - (get_line a1 = 1) && - (get_column a1 = 2) && - (get_length a1 = 11) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 15) && - (get_line a2 = 2) && - (get_column a2 = 8) && - (get_length a2 = 14) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t113() = - let r = scan [] [] " \"Two\\\nlines\" \"and\\\nqstrings\" " in - match r with - [ a1, QString "Two\nlines"; a2, QString "and\nqstrings" ] -> - - (get_pos a1 = 2) && - (get_line a1 = 1) && - (get_column a1 = 2) && - (get_length a1 = 12) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 16) && - (get_line a2 = 2) && - (get_column a2 = 8) && - (get_length a2 = 15) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t120() = - (* Domain literals are implemented like quoted strings, so only the - * most complicated test case. - *) - let r = scan [] [] " [Two\\\nlines] [and\\\nliterals] " in - match r with - [ a1, DomainLiteral "Two\nlines"; a2, DomainLiteral "and\nliterals" ] -> - - (get_pos a1 = 2) && - (get_line a1 = 1) && - (get_column a1 = 2) && - (get_length a1 = 12) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 16) && - (get_line a2 = 2) && - (get_column a2 = 8) && - (get_length a2 = 15) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t130() = - let r = scan [] [ Return_comments ] "(Two) (comments)" in - match r with - [ a1, Comment; a2, Comment ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 5) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 6) && - (get_line a2 = 1) && - (get_column a2 = 6) && - (get_length a2 = 10) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t131() = - let r = scan [] [ Return_comments ] "(Two\nlines) (and\ncomments)" in - match r with - [ a1, Comment; a2, Comment ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 11) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 12) && - (get_line a2 = 2) && - (get_column a2 = 7) && - (get_length a2 = 14) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t132() = - let r = scan [] [ Return_comments ] "(Two\\\nlines) (and\\\ncomments)" in - match r with - [ a1, Comment; a2, Comment ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 12) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 13) && - (get_line a2 = 2) && - (get_column a2 = 7) && - (get_length a2 = 15) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t133() = - let r = scan [] [ Return_comments ] "(a\n(b\nc)d\ne(f)) atom" in - match r with - [ a1, Comment; a2, Atom "atom" ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 15) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 16) && - (get_line a2 = 4) && - (get_column a2 = 6) && - (get_length a2 = 4) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t140() = - let r = scan [] [] "\031\031" in - match r with - [ a1, Control '\031'; a2, Control '\031' ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 1) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 1) && - (get_line a2 = 1) && - (get_column a2 = 1) && - (get_length a2 = 1) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t150() = - let r = scan [ '\t'; '\n' ] [] " \t\n \n \t" in - match r with - [ a1, Special '\t'; _, Special '\n'; _, Special '\n'; a2, Special '\t'] -> - - (get_pos a1 = 1) && - (get_line a1 = 1) && - (get_column a1 = 1) && - (get_length a1 = 1) && - (separates_adjacent_encoded_words a1 = false) && - - (get_pos a2 = 8) && - (get_line a2 = 3) && - (get_column a2 = 2) && - (get_length a2 = 1) && - (separates_adjacent_encoded_words a2 = false) - - | _ -> - false -;; - -let t160() = - let r = scan [] [ Recognize_encoded_words ] - "=?iso8859-1?q?G=F6rd?= =?iso8859-1?q?G=F6rd?=" in - match r with - [ a1, EncodedWord("ISO8859-1", "Q", "G=F6rd"); - a2, EncodedWord("ISO8859-1", "Q", "G=F6rd"); ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 22) && - (separates_adjacent_encoded_words a1 = false) && - (get_decoded_word a1 = "Görd") && - (get_charset a1 = "ISO8859-1") && - - (get_pos a2 = 23) && - (get_line a2 = 1) && - (get_column a2 = 23) && - (get_length a2 = 22) && - (separates_adjacent_encoded_words a2 = false) && - (get_decoded_word a2 = "Görd") && - (get_charset a2 = "ISO8859-1") - - | _ -> - false -;; - -let t161() = - let r = scan [ ' ' ] [ Recognize_encoded_words ] - "=?iso8859-1?q?G=F6rd?= =?iso8859-1?q?G=F6rd?=" in - match r with - [ a1, EncodedWord("ISO8859-1", "Q", "G=F6rd"); - sp, Special ' '; - a2, EncodedWord("ISO8859-1", "Q", "G=F6rd"); ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 22) && - (separates_adjacent_encoded_words a1 = false) && - (get_decoded_word a1 = "Görd") && - (get_charset a1 = "ISO8859-1") && - - (get_pos a2 = 23) && - (get_line a2 = 1) && - (get_column a2 = 23) && - (get_length a2 = 22) && - (separates_adjacent_encoded_words a2 = false) && - (get_decoded_word a2 = "Görd") && - (get_charset a2 = "ISO8859-1") && - - (separates_adjacent_encoded_words sp = true) - - | _ -> - false -;; - -let t162() = - let r = scan [ ' ' ] [ Recognize_encoded_words ] - "=?iso8859-1?q?G=F6rd?= =?iso8859-1?q?G=F6rd?=" in - match r with - [ a1, EncodedWord("ISO8859-1", "Q", "G=F6rd"); - sp1, Special ' '; - sp2, Special ' '; - a2, EncodedWord("ISO8859-1", "Q", "G=F6rd"); ] -> - - (get_pos a1 = 0) && - (get_line a1 = 1) && - (get_column a1 = 0) && - (get_length a1 = 22) && - (separates_adjacent_encoded_words a1 = false) && - (get_decoded_word a1 = "Görd") && - (get_charset a1 = "ISO8859-1") && - - (get_pos a2 = 24) && - (get_line a2 = 1) && - (get_column a2 = 24) && - (get_length a2 = 22) && - (separates_adjacent_encoded_words a2 = false) && - (get_decoded_word a2 = "Görd") && - (get_charset a2 = "ISO8859-1") && - - (separates_adjacent_encoded_words sp1 = true) && - (separates_adjacent_encoded_words sp2 = true) - - | _ -> - false -;; - - - -(**********************************************************************) - -let test f n = - if f() then - print_endline ("Test " ^ n ^ " ok") - else - print_endline ("Test " ^ n ^ " FAILED!!!!"); - flush stdout -;; - -test t001 "001";; -test t002 "002";; -test t003 "003";; -test t004 "004";; -test t005 "005";; -test t006 "006";; -test t007 "007";; -test t008 "008";; -test t009 "009";; -test t010 "010";; -test t011 "011";; -test t012 "012";; -test t013 "013";; - -test t020 "020";; -test t021 "021";; -test t022 "022";; -test t023 "023";; -test t024 "024";; -test t025 "025";; - -test t100 "100";; -test t101 "101";; -test t102 "102";; -test t110 "110";; -test t111 "111";; -test t112 "112";; -test t113 "113";; -test t120 "120";; -test t130 "130";; -test t131 "131";; -test t132 "132";; -test t133 "133";; -test t140 "140";; -test t150 "150";; -test t160 "160";; -test t161 "161";; -test t162 "162";; diff --git a/helm/DEVEL/pxp/netstring/tests/test_netencoding.ml b/helm/DEVEL/pxp/netstring/tests/test_netencoding.ml deleted file mode 100644 index 29673fa5f..000000000 --- a/helm/DEVEL/pxp/netstring/tests/test_netencoding.ml +++ /dev/null @@ -1,223 +0,0 @@ -#require "str";; -#directory "..";; -#load "netstring.cma";; - - -open Netencoding;; - -(**********************************************************************) -(* Base64 *) -(**********************************************************************) - -(* Test strings: - * "", "a", "ab", "abc", "abcd", "abcde", - * "abcdefghijklmnopqrstuvwxyz". - *) - -let t001() = - (* ENCODE. No line breaks. *) - Base64.encode "" = "" & - Base64.encode "a" = "YQ==" & - Base64.encode "ab" = "YWI=" & - Base64.encode "abc" = "YWJj" & - Base64.encode "abcd" = "YWJjZA==" & - Base64.encode "abcde" = "YWJjZGU=" & - Base64.encode "abcdefghijklmnopqrstuvwxyz" = - "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo=" -;; - - -let t002() = - (* ENCODE. Lines with length of 4, separated by LF *) - let abc = "abcdefghijklmnopqrstuvwxyz" in - Base64.encode_substring abc 0 0 4 false = "" & - Base64.encode_substring abc 0 1 4 false = "YQ==\n" & - Base64.encode_substring abc 0 2 4 false = "YWI=\n" & - Base64.encode_substring abc 0 3 4 false = "YWJj\n" & - Base64.encode_substring abc 0 4 4 false = "YWJj\nZA==\n" & - Base64.encode_substring abc 0 5 4 false = "YWJj\nZGU=\n" & - Base64.encode_substring abc 0 26 4 false = - "YWJj\nZGVm\nZ2hp\namts\nbW5v\ncHFy\nc3R1\ndnd4\neXo=\n" -;; - - -let t003() = - (* ENCODE. Lines with length of 5, separated by LF *) - let abc = "abcdefghijklmnopqrstuvwxyz" in - Base64.encode_substring abc 0 0 5 false = "" & - Base64.encode_substring abc 0 1 5 false = "YQ==\n" & - Base64.encode_substring abc 0 2 5 false = "YWI=\n" & - Base64.encode_substring abc 0 3 5 false = "YWJj\n" & - Base64.encode_substring abc 0 4 5 false = "YWJj\nZA==\n" & - Base64.encode_substring abc 0 5 5 false = "YWJj\nZGU=\n" & - Base64.encode_substring abc 0 26 5 false = - "YWJj\nZGVm\nZ2hp\namts\nbW5v\ncHFy\nc3R1\ndnd4\neXo=\n" -;; - - -let t004() = - (* ENCODE. Lines with length of 7, separated by LF *) - let abc = "abcdefghijklmnopqrstuvwxyz" in - Base64.encode_substring abc 0 0 7 false = "" & - Base64.encode_substring abc 0 1 7 false = "YQ==\n" & - Base64.encode_substring abc 0 2 7 false = "YWI=\n" & - Base64.encode_substring abc 0 3 7 false = "YWJj\n" & - Base64.encode_substring abc 0 4 7 false = "YWJj\nZA==\n" & - Base64.encode_substring abc 0 5 7 false = "YWJj\nZGU=\n" & - Base64.encode_substring abc 0 26 7 false = - "YWJj\nZGVm\nZ2hp\namts\nbW5v\ncHFy\nc3R1\ndnd4\neXo=\n" -;; - - -let t005() = - (* ENCODE. Lines with length of 8, separated by LF *) - let abc = "abcdefghijklmnopqrstuvwxyz" in - Base64.encode_substring abc 0 0 8 false = "" & - Base64.encode_substring abc 0 1 8 false = "YQ==\n" & - Base64.encode_substring abc 0 2 8 false = "YWI=\n" & - Base64.encode_substring abc 0 3 8 false = "YWJj\n" & - Base64.encode_substring abc 0 4 8 false = "YWJjZA==\n" & - Base64.encode_substring abc 0 5 8 false = "YWJjZGU=\n" & - Base64.encode_substring abc 0 26 8 false = - "YWJjZGVm\nZ2hpamts\nbW5vcHFy\nc3R1dnd4\neXo=\n" -;; - - -let t006() = - (* ENCODE. Lines with length of 8, separated by CRLF *) - let abc = "abcdefghijklmnopqrstuvwxyz" in - Base64.encode_substring abc 0 0 8 true = "" & - Base64.encode_substring abc 0 1 8 true = "YQ==\r\n" & - Base64.encode_substring abc 0 2 8 true = "YWI=\r\n" & - Base64.encode_substring abc 0 3 8 true = "YWJj\r\n" & - Base64.encode_substring abc 0 4 8 true = "YWJjZA==\r\n" & - Base64.encode_substring abc 0 5 8 true = "YWJjZGU=\r\n" & - Base64.encode_substring abc 0 26 8 true = - "YWJjZGVm\r\nZ2hpamts\r\nbW5vcHFy\r\nc3R1dnd4\r\neXo=\r\n" -;; - - -let t020() = - (* DECODE. First test without spaces *) - Base64.decode_substring "" 0 0 false false = "" & - Base64.decode_substring "YQ==" 0 4 false false = "a" & - Base64.decode_substring "YWI=" 0 4 false false = "ab" & - Base64.decode_substring "YWJj" 0 4 false false = "abc" & - Base64.decode_substring "YWJjZA==" 0 8 false false = "abcd" & - Base64.decode_substring "YWJjZGU=" 0 8 false false = "abcde" & - Base64.decode_substring - "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo=" 0 36 false false = - "abcdefghijklmnopqrstuvwxyz" -;; - - -let t021() = - (* DECODE. With spaces *) - Base64.decode_substring " \r\n\t" 0 4 false true = "" & - Base64.decode_substring " Y W J j\n Z G U = " 0 18 false true = "abcde" -;; - - -let t022() = - (* DECODE. With URL characters and spaces *) - Base64.decode_substring " Y W J j\n Z G U = " 0 18 true true = "abcde" & - Base64.decode_substring " Y W J j\n Z G U . " 0 18 true true = "abcde" -;; - -(**********************************************************************) -(* Quoted Printable *) -(**********************************************************************) - -let t100() = - (* ENCODE. *) - QuotedPrintable.encode "a %= 12345 &$[]\"" = "a %=3D 12345 &=24=5B=5D=22" & - QuotedPrintable.encode "\000\001\002" = "=00=01=02" & - QuotedPrintable.encode "abc\r\ndef\nghi" = "abc\r\ndef\nghi" & - QuotedPrintable.encode " abc\r\n def\n ghi" = " abc\r\n def\n ghi" & - QuotedPrintable.encode "abc \r\n def\nghi " = "abc=20\r\n def\nghi=20" -;; - - -let t120() = - (* DECODE. *) - QuotedPrintable.decode "a %=3D 12345 &=24=5B=5D=22" = "a %= 12345 &$[]\"" & - QuotedPrintable.decode "=00=01=02" = "\000\001\002" & - QuotedPrintable.decode "abc\r\ndef\nghi" = "abc\r\ndef\nghi" & - QuotedPrintable.decode " abc\r\n def\n ghi" = " abc\r\n def\n ghi" & - QuotedPrintable.decode "abc=20\r\n def\nghi=20" = "abc \r\n def\nghi " & - QuotedPrintable.decode "abc=\r\n def\nghi=20" = "abc def\nghi " -;; - -(**********************************************************************) -(* Q *) -(**********************************************************************) - -let t200() = - (* ENCODE. *) - Q.encode "a %= 12345 &$[]\"" = "a=20=25=3D=2012345=20=26=24=5B=5D=22" & - Q.encode "\000\001\002\r\n" = "=00=01=02=0D=0A" -;; - - -let t220() = - (* DECODE. *) - Q.decode "a=20=25=3D=2012345=20=26=24=5B=5D=22" = "a %= 12345 &$[]\"" & - Q.decode "=00=01=02=0D=0A" = "\000\001\002\r\n" & - Q.decode "a=20=25=3d=2012345=20=26=24=5b=5d=22" = "a %= 12345 &$[]\"" -;; - -(**********************************************************************) -(* Url *) -(**********************************************************************) - -(* Already tested for Cgi *) - -(**********************************************************************) -(* Html *) -(**********************************************************************) - -let t300() = - Html.encode_from_latin1 "<>&\"abcdefäöÜ\160\025'" = - "<>&"abcdefäöÜ '" -;; - - -let t320() = - Html.decode_to_latin1 - "<>&"abcdefäöÜ " = - "<>&\"abcdefäöÜ\160\025" & - Html.decode_to_latin1 "'" = "'" & - Html.decode_to_latin1 "&nonsense;" = "&nonsense;" & - Html.decode_to_latin1 "Ā" = "Ā" -;; - - -(**********************************************************************) - -let test f n = - if f() then - print_endline ("Test " ^ n ^ " ok") - else - print_endline ("Test " ^ n ^ " FAILED!!!!"); - flush stdout -;; - -test t001 "001"; -test t002 "002"; -test t003 "003"; -test t004 "004"; -test t005 "005"; -test t006 "006"; - -test t020 "020"; -test t021 "021"; -test t022 "022"; - -test t100 "100"; -test t120 "120"; - -test t200 "200"; -test t220 "220"; - -test t300 "300"; -test t320 "320"; diff --git a/helm/DEVEL/pxp/netstring/tests/test_neturl.ml b/helm/DEVEL/pxp/netstring/tests/test_neturl.ml deleted file mode 100644 index 633bfda09..000000000 --- a/helm/DEVEL/pxp/netstring/tests/test_neturl.ml +++ /dev/null @@ -1,969 +0,0 @@ -#directory "..";; -#load "netstring.cma";; - -open Neturl;; - - -let expect_malformed_url f = - try ignore(f()); false with Malformed_URL -> true;; - -let works f = - not (expect_malformed_url f) -;; - -(**********************************************************************) -(* extract_url_scheme *) -(**********************************************************************) - -let t001 () = - extract_url_scheme "a:bc" = "a" && - extract_url_scheme "A:bc" = "a" && - extract_url_scheme "a:b:c" = "a" && - extract_url_scheme "a+b-c:d:e" = "a+b-c" -;; - - -let t002 () = - let test s = - try ignore(extract_url_scheme s); false with Malformed_URL -> true - in - test "a" && - test "a/b:c" && - test "%61:b" && - test "a%3ab" -;; - -(**********************************************************************) -(* url_syntax *) -(**********************************************************************) - -let hashtbl_for_all f h = - let b = ref true in - Hashtbl.iter - (fun k v -> b := !b && f k v) - h; - !b -;; - -let t010 () = - url_syntax_is_valid null_url_syntax && - url_syntax_is_valid ip_url_syntax && - hashtbl_for_all - (fun _ syn -> - url_syntax_is_valid syn - ) - common_url_syntax -;; - -let t011 () = - url_syntax_is_valid (partial_url_syntax null_url_syntax) && - url_syntax_is_valid (partial_url_syntax ip_url_syntax) && - hashtbl_for_all - (fun _ syn -> - url_syntax_is_valid (partial_url_syntax syn) - ) - common_url_syntax -;; - -let t012 () = - let f = fun _ -> true in - let syn = - { url_enable_scheme = Url_part_not_recognized; - url_enable_user = Url_part_required; - url_enable_password = Url_part_allowed; - url_enable_host = Url_part_required; - url_enable_port = Url_part_not_recognized; - url_enable_path = Url_part_required; - url_enable_param = Url_part_not_recognized; - url_enable_query = Url_part_not_recognized; - url_enable_fragment = Url_part_required; - url_enable_other = Url_part_not_recognized; - url_accepts_8bits = false; - url_is_valid = f; - } in - let syn' = partial_url_syntax syn in - - (syn'.url_enable_scheme = Url_part_not_recognized) && - (syn'.url_enable_user = Url_part_allowed) && - (syn'.url_enable_password = Url_part_allowed) && - (syn'.url_enable_host = Url_part_allowed) && - (syn'.url_enable_port = Url_part_not_recognized) && - (syn'.url_enable_path = Url_part_allowed) && - (syn'.url_enable_param = Url_part_not_recognized) && - (syn'.url_enable_query = Url_part_not_recognized) && - (syn'.url_enable_fragment = Url_part_allowed) && - (syn'.url_enable_other = Url_part_not_recognized) && - (syn'.url_is_valid == f) && - - url_syntax_is_valid syn && - url_syntax_is_valid syn' -;; - -(**********************************************************************) -(* make_url *) -(**********************************************************************) - -let t020 () = - (* Basic functionality: *) - let http_syn = Hashtbl.find common_url_syntax "http" in - - let u1 = make_url - (* default: not encoded *) - ~scheme:"http" - ~user:"U" - ~password:"%()~$@" - ~host:"a.b.c" - ~port:81 - ~path:["";"?";""] - http_syn in - - url_provides - ~scheme:true ~user:true ~password:true ~host:true ~port:true ~path:true - u1 && - - not - (url_provides - ~scheme:true ~user:true ~password:true ~host:true ~port:true ~path:true - ~query:true u1) && - - (url_syntax_of_url u1 == http_syn) && - - (url_scheme u1 = "http") && - (url_user u1 = "U") && - (url_password u1 = "%()~$@") && - (url_host u1 = "a.b.c") && - (url_port u1 = 81) && - (url_path u1 = ["";"?";""]) && - - (url_user ~encoded:true u1 = "U") && - (url_password ~encoded:true u1 = "%25()%7E$%40") && - (url_path ~encoded:true u1 = ["";"%3F";""]) && - - string_of_url u1 = "http://U:%25()%7E$%40@a.b.c:81/%3F/" -;; - - -let t021 () = - (* Basic functionality: *) - let http_syn = Hashtbl.find common_url_syntax "http" in - - let u1 = make_url - ~encoded:true - ~scheme:"http" - ~user:"%55" - ~password:"%25()%7e$%40" - ~host:"a.b.c" - ~port:81 - ~path:["";"%3F";""] - http_syn in - - url_provides - ~scheme:true ~user:true ~password:true ~host:true ~port:true ~path:true - u1 && - - not - (url_provides - ~scheme:true ~user:true ~password:true ~host:true ~port:true ~path:true - ~query:true u1) && - - (url_syntax_of_url u1 == http_syn) && - - (url_scheme u1 = "http") && - (url_user u1 = "U") && - (url_password u1 = "%()~$@") && - (url_host u1 = "a.b.c") && - (url_port u1 = 81) && - (url_path u1 = ["";"?";""]) && - - (url_user ~encoded:true u1 = "%55") && - (url_password ~encoded:true u1 = "%25()%7e$%40") && - (url_path ~encoded:true u1 = ["";"%3F";""]) && - - string_of_url u1 = "http://%55:%25()%7e$%40@a.b.c:81/%3F/" -;; - - -(* NEGATIVE TESTS *) - -let t030 () = - (* It is not possible to add a component which is not recognized *) - let http_syn = Hashtbl.find common_url_syntax "http" in - - expect_malformed_url - (fun () -> - make_url - ~scheme:"http" - ~user:"U" - ~password:"%()~$@" - ~host:"a.b.c" - ~port:81 - ~path:["";"?";""] - ~fragment:"abc" - http_syn) -;; - - -let t031 () = - (* It is not possible to put malformed '%'-encodings into the URL *) - let http_syn = Hashtbl.find common_url_syntax "http" in - - works (* reference *) - (fun () -> - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:"XX" - ~host:"a.b.c" - ~port:81 - ~path:["";"a";""] - http_syn) && - - expect_malformed_url - (fun () -> - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:"%XX" - ~host:"a.b.c" - ~port:81 - ~path:["";"a";""] - http_syn) && - - expect_malformed_url - (fun () -> - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:"%X" - ~host:"a.b.c" - ~port:81 - ~path:["";"a";""] - http_syn) && - - expect_malformed_url - (fun () -> - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:"%" - ~host:"a.b.c" - ~port:81 - ~path:["";"a";""] - http_syn) -;; - -let t032 () = - (* It is not possible to put unsafe characters into the URL *) - let http_syn = Hashtbl.find common_url_syntax "http" in - - let make c = - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:(String.make 1 c) - ~host:"a.b.c" - ~port:81 - ~path:["";"a";""] - http_syn - in - - works (fun () -> make 'a') && (* reference *) - - (* List of unsafe characters taken from RFC1738: *) - expect_malformed_url (fun () -> make '<') && - expect_malformed_url (fun () -> make '>') && - expect_malformed_url (fun () -> make '"') && - expect_malformed_url (fun () -> make '#') && - (* Note: '#' would be considered as reserved if fragments were enabled *) - expect_malformed_url (fun () -> make '%') && - expect_malformed_url (fun () -> make '{') && - expect_malformed_url (fun () -> make '}') && - expect_malformed_url (fun () -> make '|') && - expect_malformed_url (fun () -> make '\\') && - expect_malformed_url (fun () -> make '^') && - expect_malformed_url (fun () -> make '[') && - expect_malformed_url (fun () -> make ']') && - expect_malformed_url (fun () -> make '`') && - expect_malformed_url (fun () -> make '~') && - (* Note: '~' is considered as safe in paths: *) - works - (fun () -> - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:"a" - ~host:"a.b.c" - ~port:81 - ~path:["";"~";""] - http_syn) -;; - -let t033 () = - (* It is not possible to put reserved characters into the URL *) - let http_syn = Hashtbl.find common_url_syntax "http" in - - let make_password c = - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:(String.make 1 c) - ~host:"a.b.c" - ~port:81 - ~path:["";"a";""] - http_syn - in - let make_path c = - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:"a" - ~host:"a.b.c" - ~port:81 - ~path:["";String.make 1 c;""] - http_syn - in - let make_query c = - make_url - ~encoded:true - ~scheme:"http" - ~user:"U" - ~password:"a" - ~host:"a.b.c" - ~port:81 - ~path:["";"a";""] - ~query:(String.make 1 c) - http_syn - in - - (* Note: There is a difference between RFC 1738 and RFC 1808 regarding - * which characters are reserved. RFC 1808 defines a fixed set of characters - * as reserved while RFC 1738 defines the reserved characters depending - * on the scheme. - * This implementation of URLs follows RFC 1738 (because of practical - * reasons). - *) - - works (fun () -> make_password 'a') && (* reference *) - works (fun () -> make_path 'a') && - works (fun () -> make_query 'a') && - - expect_malformed_url (fun () -> make_password ':') && - expect_malformed_url (fun () -> make_password '@') && - expect_malformed_url (fun () -> make_password '/') && - works (fun () -> make_password ';') && - works (fun () -> make_password '?') && - works (fun () -> make_password '=') && - works (fun () -> make_password '&') && - - (* Note: ';' is allowed in path and query because parameters are not - * recognized in HTTP syntax. - *) - - expect_malformed_url (fun () -> make_path '/') && - expect_malformed_url (fun () -> make_path '?') && - works (fun () -> make_path ':') && - works (fun () -> make_path '@') && - works (fun () -> make_path ';') && - works (fun () -> make_path '=') && - works (fun () -> make_path '&') && - - expect_malformed_url (fun () -> make_query '?') && - works (fun () -> make_query '/') && - works (fun () -> make_query ':') && - works (fun () -> make_query '@') && - works (fun () -> make_query ';') && - works (fun () -> make_query '=') && - works (fun () -> make_query '&') -;; - - -let t034 () = - (* It is not possible to create a URL with a password, but without user; - * and neither to create a URL with a port, but without host; - * and neither to create a URL with a user, but without host - *) - - expect_malformed_url - (fun () -> - make_url - ~scheme:"http" - ~password:"a" - ~host:"a.b.c" - ~path:["";"a";""] - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~scheme:"http" - ~user:"U" - ~path:["";"a";""] - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~scheme:"http" - ~port:81 - ~path:["";"a";""] - ip_url_syntax) -;; - - -let t035 () = - (* It is not possible to create a URL with illegal scheme prefix *) - - (* reference: *) - works - (fun () -> - make_url - ~scheme:"a" - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~scheme:":" - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~scheme:"a=b" - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~scheme:"a%62b" - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~scheme:"a&b" - ip_url_syntax) -;; - - -let t036 () = - (* It is not possible to have a path with double slashes *) - - (* reference: *) - works - (fun () -> - make_url - ~path:["";"a";""] - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~path:["";""] - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~path:["a";"";""] - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~path:["";"";"a"] - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~path:["a";"";"a"] - ip_url_syntax) -;; - - -let t037 () = - (* It is not possible to have port numbers outside 0..65535 *) - - (* reference: *) - works - (fun () -> - make_url - ~host:"a" - ~port:1 - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~host:"a" - ~port:(-1) - ip_url_syntax) && - - expect_malformed_url - (fun () -> - make_url - ~host:"a" - ~port:65536 - ip_url_syntax) -;; - - -let t038 () = - (* Several cases which are not allowed. *) - - expect_malformed_url - (fun () -> - make_url - ~host:"a" - ~path:["a"] - ip_url_syntax - ) && (* illegal: host + relative path *) - - expect_malformed_url - (fun () -> - make_url - ~host:"a" - ~path:[] - ~param:["x"] - ip_url_syntax - ) && (* illegal: host + no path + params *) - - expect_malformed_url - (fun () -> - make_url - ~host:"a" - ~path:[] - ~query:"x" - ip_url_syntax - ) (* illegal: host + no path + query *) -;; - -(**********************************************************************) -(* url_of_string *) -(**********************************************************************) - -let t050 () = - (* absolute URLs with ip_url_syntax *) - let identical s = - string_of_url (url_of_string ip_url_syntax s) = s in - - let fails s = - try ignore(url_of_string ip_url_syntax s); false - with Malformed_URL -> true - in - - identical "http:" && - - identical "http://host" && - identical "http://user@host" && - identical "http://user:password@host" && - identical "http://user@host:99" && - identical "http://user:password@host:99" && - - identical "http://host/" && - identical "http://user@host/" && - identical "http://user:password@host/" && - identical "http://user@host:99/" && - identical "http://user:password@host:99/" && - - identical "http://host/a/b" && - identical "http://user@host/a/b" && - identical "http://user:password@host/a/b" && - identical "http://user@host:99/a/b" && - identical "http://user:password@host:99/a/b" && - - identical "http://host/a/b/" && - identical "http://user@host/a/b/" && - identical "http://user:password@host/a/b/" && - identical "http://user@host:99/a/b/" && - identical "http://user:password@host:99/a/b/" && - - identical "http://host/?a=b&c=d" && - identical "http://user@host/?a=b&c=d" && - identical "http://user:password@host/?a=b&c=d" && - identical "http://user@host:99/?a=b&c=d" && - identical "http://user:password@host:99/?a=b&c=d" && - - fails "http://host?a=b&c=d" && - fails "http://user@host?a=b&c=d" && - fails "http://user:password@host?a=b&c=d" && - fails "http://user@host:99?a=b&c=d" && - fails "http://user:password@host:99?a=b&c=d" && - - identical "http://host/?a=/&c=/" && - identical "http://user@host/?a=/&c=/" && - identical "http://user:password@host/?a=/&c=/" && - identical "http://user@host:99/?a=/&c=/" && - identical "http://user:password@host:99/?a=/&c=/" && - - identical "http://host/;a;b" && - identical "http://user@host/;a;b" && - identical "http://user:password@host/;a;b" && - identical "http://user@host:99/;a;b" && - identical "http://user:password@host:99/;a;b" && - - fails "http://host;a;b" && - fails "http://user@host;a;b" && - fails "http://user:password@host;a;b" && - fails "http://user@host:99;a;b" && - fails "http://user:password@host:99;a;b" && - - identical "http://host/;a;b?a=b&c=d" && - identical "http://user@host/;a;b?a=b&c=d" && - identical "http://user:password@host/;a;b?a=b&c=d" && - identical "http://user@host:99/;a;b?a=b&c=d" && - identical "http://user:password@host:99/;a;b?a=b&c=d" && - - identical "http:#f" && - - identical "http://host#f" && - identical "http://user@host#f" && - identical "http://user:password@host#f" && - identical "http://user@host:99#f" && - identical "http://user:password@host:99#f" && - - identical "http://host/;a;b?a=b&c=d#f" && - identical "http://user@host/;a;b?a=b&c=d#f" && - identical "http://user:password@host/;a;b?a=b&c=d#f" && - identical "http://user@host:99/;a;b?a=b&c=d#f" && - identical "http://user:password@host:99/;a;b?a=b&c=d#f" && - - true -;; - - -let t051 () = - (* relative URLs with ip_url_syntax *) - let identical s = - string_of_url (url_of_string ip_url_syntax s) = s in - - let fails s = - try ignore(url_of_string ip_url_syntax s); false - with Malformed_URL -> true - in - - identical "//host" && - identical "//user@host" && - identical "//user:password@host" && - identical "//user@host:99" && - identical "//user:password@host:99" && - - identical "//host/" && - identical "//user@host/" && - identical "//user:password@host/" && - identical "//user@host:99/" && - identical "//user:password@host:99/" && - - identical "//host#f" && - identical "//user@host#f" && - identical "//user:password@host#f" && - identical "//user@host:99#f" && - identical "//user:password@host:99#f" && - - identical "/" && - identical "/a" && - identical "/a/" && - identical "/a/a" && - - identical "/;a;b" && - identical "/a;a;b" && - identical "/a/;a;b" && - identical "/a/a;a;b" && - - identical "/?a=b&c=d" && - identical "/a?a=b&c=d" && - identical "/a/?a=b&c=d" && - identical "/a/a?a=b&c=d" && - - identical "/;a;b?a=b&c=d" && - identical "/a;a;b?a=b&c=d" && - identical "/a/;a;b?a=b&c=d" && - identical "/a/a;a;b?a=b&c=d" && - - identical "/#f" && - identical "/a#f" && - identical "/a/#f" && - identical "/a/a#f" && - - identical "/;a;b#f" && - identical "/a;a;b#f" && - identical "/a/;a;b#f" && - identical "/a/a;a;b#f" && - - identical "/;a;b?a=b&c=d#f" && - identical "/a;a;b?a=b&c=d#f" && - identical "/a/;a;b?a=b&c=d#f" && - identical "/a/a;a;b?a=b&c=d#f" && - - identical "" && - identical "a" && - identical "a/" && - identical "a/a" && - - identical ";a;b" && - identical "a;a;b" && - identical "a/;a;b" && - identical "a/a;a;b" && - - identical "?a=b&c=d" && - identical "a?a=b&c=d" && - identical "a/?a=b&c=d" && - identical "a/a?a=b&c=d" && - - identical ";a;b?a=b&c=d" && - identical "a;a;b?a=b&c=d" && - identical "a/;a;b?a=b&c=d" && - identical "a/a;a;b?a=b&c=d" && - - identical "#f" && - identical "a#f" && - identical "a/#f" && - identical "a/a#f" && - - identical ";a;b#f" && - identical "a;a;b#f" && - identical "a/;a;b#f" && - identical "a/a;a;b#f" && - - identical ";a;b?a=b&c=d#f" && - identical "a;a;b?a=b&c=d#f" && - identical "a/;a;b?a=b&c=d#f" && - identical "a/a;a;b?a=b&c=d#f" && - - identical "." && - identical "./" && - identical "./a" && - - identical ".;a;b" && - identical "./;a;b" && - identical "./a;a;b" && - - identical ".?a=b&c=d" && - identical "./?a=b&c=d" && - identical "./a?a=b&c=d" && - - identical ".;a;b?a=b&c=d" && - identical "./;a;b?a=b&c=d" && - identical "./a;a;b?a=b&c=d" && - - identical ".#f" && - identical "./#f" && - identical "./a#f" && - - identical ".;a;b#f" && - identical "./;a;b#f" && - identical "./a;a;b#f" && - - identical ".;a;b?a=b&c=d#f" && - identical "./;a;b?a=b&c=d#f" && - identical "./a;a;b?a=b&c=d#f" && - - identical ".." && - identical "../" && - identical "../a" && - - identical "..;a;b" && - identical "../;a;b" && - identical "../a;a;b" && - - identical "..?a=b&c=d" && - identical "../?a=b&c=d" && - identical "../a?a=b&c=d" && - - identical "..;a;b?a=b&c=d" && - identical "../;a;b?a=b&c=d" && - identical "../a;a;b?a=b&c=d" && - - identical "..#f" && - identical "../#f" && - identical "../a#f" && - - identical "..;a;b#f" && - identical "../;a;b#f" && - identical "../a;a;b#f" && - - identical "..;a;b?a=b&c=d#f" && - identical "../;a;b?a=b&c=d#f" && - identical "../a;a;b?a=b&c=d#f" && - - string_of_url - (make_url ~path:["a:b"] ip_url_syntax) = "a%3Ab" && - - string_of_url - (make_url ~encoded:true ~path:["a:b"] ip_url_syntax) = "./a:b" && - - true -;; - - -let t052 () = - (* mailto: URLs *) - let mailto_syn = Hashtbl.find common_url_syntax "mailto" in - - let identical s = - string_of_url (url_of_string mailto_syn s) = s in - - let fails s = - try ignore(url_of_string mailto_syn s); false - with Malformed_URL -> true - in - - identical "mailto:user@host" && - identical "mailto:user@host;?;?" && - fails "mailto:user@host#f" -;; - -(**********************************************************************) -(* split_path/join_path/norm_path: *) -(**********************************************************************) - -let t060 () = - (split_path "" = []) && - (split_path "/" = [ "" ]) && - (split_path "/a" = [ ""; "a" ]) && - (split_path "a" = [ "a" ]) && - (split_path "a/" = [ "a"; "" ]) && - (split_path "/a/" = [ ""; "a"; "" ]) && - (split_path "/a/b" = [ ""; "a"; "b" ]) && - (split_path "/a/b/" = [ ""; "a"; "b"; "" ]) && - (split_path "/a/b/c" = [ ""; "a"; "b"; "c" ]) && - - (join_path [] = "") && - (join_path [ "" ] = "/") && - (join_path [ ""; "a" ] = "/a") && - (join_path [ "a" ] = "a") && - (join_path [ "a"; "" ] = "a/") && - (join_path [ ""; "a"; "" ] = "/a/") && - (join_path [ ""; "a"; "b" ] = "/a/b") && - (join_path [ ""; "a"; "b"; "" ] = "/a/b/") && - (join_path [ ""; "a"; "b"; "c" ] = "/a/b/c") && - - true -;; - - -let t061 () = - (norm_path ["."] = []) && - (norm_path ["."; ""] = []) && - (norm_path ["a"; "."] = ["a"; ""]) && - (norm_path ["a"; "b"; "."] = ["a"; "b"; ""]) && - (norm_path ["a"; "b"; ".."] = ["a"; ""]) && - (norm_path ["a"; "."; "b"; "."] = ["a"; "b"; ""]) && - (norm_path [".."] = [".."; ""]) && - (norm_path [".."; ""] = [".."; ""]) && - (norm_path ["a"; "b"; ".."; "c" ] = ["a"; "c"]) && - (norm_path ["a"; "b"; ".."; "c"; ""] = ["a"; "c"; ""]) && - (norm_path ["";"";"a";"";"b"] = [""; "a"; "b"]) && - (norm_path ["a"; "b"; ""; ".."; "c"; ""] = ["a"; "c"; ""]) && - (norm_path ["a"; ".."] = []) && - (norm_path ["";""] = [""]) && - (norm_path [""] = [""]) && - (norm_path [] = []) && - - true -;; - -(**********************************************************************) -(* apply_relative_url: *) -(**********************************************************************) - -let t070() = - (* Examples taken from RFC 1808 *) - let url = url_of_string ip_url_syntax in - let base = url "http://a/b/c/d;p?q#f" in - let aru = apply_relative_url base in - - (aru (url "g:h") = url "g:h") && - (aru (url "g") = url "http://a/b/c/g") && - (aru (url "./g") = url "http://a/b/c/g") && - (aru (url "g/") = url "http://a/b/c/g/") && - (aru (url "/g") = url "http://a/g") && - (aru (url "//g") = url "http://g") && - (aru (url "?y") = url "http://a/b/c/d;p?y") && - (aru (url "g?y") = url "http://a/b/c/g?y") && - (aru (url "g?y/./x") = url "http://a/b/c/g?y/./x") && - (aru (url "#s") = url "http://a/b/c/d;p?q#s") && - (aru (url "g#s") = url "http://a/b/c/g#s") && - (aru (url "g#s/./x") = url "http://a/b/c/g#s/./x") && - (aru (url "g?y#s") = url "http://a/b/c/g?y#s") && - (aru (url ";x") = url "http://a/b/c/d;x") && - (aru (url "g;x") = url "http://a/b/c/g;x") && - (aru (url "g;x?y#s") = url "http://a/b/c/g;x?y#s") && - (aru (url ".") = url "http://a/b/c/") && - (aru (url "./") = url "http://a/b/c/") && - (aru (url "..") = url "http://a/b/") && - (aru (url "../") = url "http://a/b/") && - (aru (url "../g") = url "http://a/b/g") && - (aru (url "../..") = url "http://a/") && - (aru (url "../../") = url "http://a/") && - (aru (url "../../g") = url "http://a/g") && - - (aru (url "") = url "http://a/b/c/d;p?q#f") && - (aru (url "../../../g") = url "http://a/../g") && - (aru (url "../../../../g") = url "http://a/../../g") && - (aru (url "/./g") = url "http://a/./g") && - (aru (url "/../g") = url "http://a/../g") && - (aru (url "g.") = url "http://a/b/c/g.") && - (aru (url ".g") = url "http://a/b/c/.g") && - (aru (url "g..") = url "http://a/b/c/g..") && - (aru (url "..g") = url "http://a/b/c/..g") && - (aru (url "./../g") = url "http://a/b/g") && - (aru (url "./g/.") = url "http://a/b/c/g/") && - (aru (url "g/./h") = url "http://a/b/c/g/h") && - (aru (url "g/../h") = url "http://a/b/c/h") && - (aru (url "http:g") = url "http:g") && - (aru (url "http:") = url "http:") && - - true -;; - - -(**********************************************************************) - -let test f n = - if f() then - print_endline ("Test " ^ n ^ " ok") - else - print_endline ("Test " ^ n ^ " FAILED!!!!"); - flush stdout -;; - -test t001 "001"; -test t002 "002"; - -test t010 "010"; -test t011 "011"; -test t012 "012"; - -test t020 "020"; -test t021 "021"; - -test t030 "030"; -test t031 "031"; -test t032 "032"; -test t033 "033"; -test t034 "034"; -test t035 "035"; -test t036 "036"; -test t037 "037"; -test t038 "038"; - -test t050 "050"; -test t051 "051"; -test t052 "052"; - -test t060 "060"; -test t061 "061"; - -test t070 "070"; -() -;; diff --git a/helm/DEVEL/pxp/netstring/tests/test_recode.ml b/helm/DEVEL/pxp/netstring/tests/test_recode.ml deleted file mode 100644 index 64a04caae..000000000 --- a/helm/DEVEL/pxp/netstring/tests/test_recode.ml +++ /dev/null @@ -1,169 +0,0 @@ - - -let make_iso enc = - let s = ref "" in - for i = 0 to 255 do - let u = try Netconversion.makechar (enc :> Netconversion.encoding) i - with Not_found -> "" in - s := !s ^ u - done; - !s -;; - -let make_ucs2 start stop = - let s = String.create ((stop - start) * 2) in - for i = 0 to stop-start-1 do - let k = 2 * i in - let c = i + start in - s.[k] <- Char.chr(c lsr 8); - s.[k+1] <- Char.chr(c land 0xff); - done; - s -;; - -let make_ucs4 start stop = - let s = String.create ((stop - start) * 4) in - for i = 0 to stop-start-1 do - let k = 4 * i in - let c = i + start in - s.[k] <- Char.chr(c lsr 24); - s.[k+1] <- Char.chr((c lsr 16) land 0xff); - s.[k+2] <- Char.chr((c lsr 8) land 0xff); - s.[k+3] <- Char.chr(c land 0xff); - done; - s -;; - -let name_of_encoding enc = - match enc with - `Enc_iso88591 -> "ISO_8859-1" - | `Enc_iso88592 -> "ISO_8859-2" - | `Enc_iso88593 -> "ISO_8859-3" - | `Enc_iso88594 -> "ISO_8859-4" - | `Enc_iso88595 -> "ISO_8859-5" - | `Enc_iso88596 -> "ISO_8859-6" - | `Enc_iso88597 -> "ISO_8859-7" - | `Enc_iso88598 -> "ISO_8859-8" - | `Enc_iso88599 -> "ISO_8859-9" - | `Enc_iso885910 -> "ISO_8859-10" - | `Enc_iso885913 -> "ISO_8859-13" - | `Enc_iso885914 -> "ISO_8859-14" - | `Enc_iso885915 -> "ISO_8859-15" - | `Enc_utf8 -> "UTF-8" - | `Enc_ucs4 -> "UCS-4" - | `Enc_ucs2 -> "UCS-2" - | `Enc_utf16 -> "UTF-16" - - (* Note: GNU-iconv assumes big endian byte order *) -;; - -let iconv_recode_string in_enc out_enc in_s = - let in_enc_name = name_of_encoding in_enc in - let out_enc_name = name_of_encoding out_enc in - let out_s = ref "" in - - let out_ch,in_ch = Unix.open_process ("iconv -f " ^ in_enc_name ^ " -t " ^ - out_enc_name) in - (* Write in_s to in_ch in a new thread: *) - ignore - (Thread.create - (fun () -> - output_string in_ch in_s; - close_out in_ch; - ) - () - ); - (* Read the result in the current thread: *) - let buf = String.create 1024 in - let n = ref 1 in - while !n <> 0 do - let n' = input out_ch buf 0 1024 in - out_s := !out_s ^ String.sub buf 0 n'; - n := n' - done; - ignore(Unix.close_process (out_ch,in_ch)); - !out_s -;; - -let test_iso_and_utf8 enc = - let name = name_of_encoding enc in - print_string ("Recode: " ^ name ^ " and UTF-8... "); flush stdout; - let s = make_iso enc in - let s1' = Netconversion.recode_string (enc :> Netconversion.encoding) - `Enc_utf8 s in - let s2' = iconv_recode_string enc `Enc_utf8 s in - assert(s1' = s2'); - let s1 = Netconversion.recode_string `Enc_utf8 - (enc :> Netconversion.encoding) s1' in - let s2 = iconv_recode_string `Enc_utf8 enc s1' in - assert(s1 = s2 && s1 = s); - print_endline "OK"; flush stdout -;; - -let test_utf16_and_utf8_0000_d7ff () = - print_string "Recode: UTF-16-BE and UTF-8, #0000-#D7FF... "; - flush stdout; - let s = make_ucs2 0 0xd800 in - let s1' = Netconversion.recode_string `Enc_utf16_be `Enc_utf8 s in - let s2' = iconv_recode_string `Enc_utf16 `Enc_utf8 s in - assert(s1' = s2'); - let s1 = Netconversion.recode_string `Enc_utf8 `Enc_utf16_be s1' in - let s2 = iconv_recode_string `Enc_utf8 `Enc_utf16 s1' in - assert(s1 = s2 && s1 = s); - print_endline "OK"; flush stdout -;; - -let test_utf16_and_utf8_e000_fffd () = - print_string "Recode: UTF-16-BE and UTF-8, #E000-#FFFD... "; - flush stdout; - let s = make_ucs2 0xe000 0xfffe in - let s1' = Netconversion.recode_string `Enc_utf16_be `Enc_utf8 s in - let s2' = iconv_recode_string `Enc_utf16 `Enc_utf8 s in - assert(s1' = s2'); - let s1 = Netconversion.recode_string `Enc_utf8 `Enc_utf16_be s1' in - let s2 = iconv_recode_string `Enc_utf8 `Enc_utf16 s1' in - assert(s1 = s2 && s1 = s); - print_endline "OK"; flush stdout -;; - -let test_utf16_and_utf8_10000_10FFFF () = - print_string "Recode: UTF-16-BE and UTF-8, #10000-#10FFFF... "; - flush stdout; - for i = 1 to 16 do - let s0 = make_ucs4 (i * 0x10000) (i * 0x10000 + 0x10000) in - let s = iconv_recode_string `Enc_ucs4 `Enc_utf16 s0 in - let s1' = Netconversion.recode_string `Enc_utf16_be `Enc_utf8 s in - let s2' = iconv_recode_string `Enc_utf16 `Enc_utf8 s in - assert(s1' = s2'); - let s1 = Netconversion.recode_string `Enc_utf8 `Enc_utf16_be s1' in - let s2 = iconv_recode_string `Enc_utf8 `Enc_utf16 s1' in - assert(s1 = s2 && s1 = s); - print_string "+"; flush stdout; - done; - print_endline "OK"; flush stdout -;; - - -print_endline "Warning: You need the command 'iconv' to run this test!"; -flush stdout; -test_iso_and_utf8 `Enc_iso88591; -test_iso_and_utf8 `Enc_iso88592; -test_iso_and_utf8 `Enc_iso88593; -test_iso_and_utf8 `Enc_iso88594; -test_iso_and_utf8 `Enc_iso88595; -test_iso_and_utf8 `Enc_iso88596; -test_iso_and_utf8 `Enc_iso88597; -(* test_iso_and_utf8 `Enc_iso88598; *) -test_iso_and_utf8 `Enc_iso88599; -test_iso_and_utf8 `Enc_iso885910; -(* test_iso_and_utf8 `Enc_iso885913; *) -(* test_iso_and_utf8 `Enc_iso885914; *) -(* test_iso_and_utf8 `Enc_iso885915; *) -test_utf16_and_utf8_0000_d7ff(); -test_utf16_and_utf8_e000_fffd(); -(* This test does not work because iconv does not support the surrogate - * representation of UTF-16: - * test_utf16_and_utf8_10000_10FFFF(); - *) -() -;; diff --git a/helm/DEVEL/pxp/netstring/tools/Makefile b/helm/DEVEL/pxp/netstring/tools/Makefile deleted file mode 100644 index b3c148db7..000000000 --- a/helm/DEVEL/pxp/netstring/tools/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -all: - $(MAKE) -C unimap_to_ocaml - -clean: - -CLEAN: clean - $(MAKE) -C unimap_to_ocaml CLEAN - -distclean: clean - $(MAKE) -C unimap_to_ocaml distclean diff --git a/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/.cvsignore b/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/.cvsignore deleted file mode 100644 index c1fcbc4ae..000000000 --- a/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/.cvsignore +++ /dev/null @@ -1,7 +0,0 @@ -*.cmo -*.cmx -*.cmi - -*.o -*.a - diff --git a/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/Makefile b/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/Makefile deleted file mode 100644 index ed4277389..000000000 --- a/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/Makefile +++ /dev/null @@ -1,15 +0,0 @@ -all: unimap_to_ocaml - -unimap_to_ocaml: unimap_to_ocaml.ml - ocamlfind ocamlc -g -package str -linkpkg -custom \ - -o unimap_to_ocaml \ - unimap_to_ocaml.ml - -clean: - rm -f *.cmi *.cmo *.cma *.cmx *.o *.a *.cmxa - -CLEAN: clean - -distclean: clean - rm -f *~ unimap_to_ocaml - diff --git a/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/unimap_to_ocaml.ml b/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/unimap_to_ocaml.ml deleted file mode 100644 index 14a89e9d9..000000000 --- a/helm/DEVEL/pxp/netstring/tools/unimap_to_ocaml/unimap_to_ocaml.ml +++ /dev/null @@ -1,201 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -open Printf;; - -let comment_re = Str.regexp "#.*$";; -let space_re = Str.regexp "[ \t\r\n]+";; - -let read_unimap_format_a fname f = - (* Reads a Unicode mapping in format A from a "local" code to Unicode. - * Returns a list of pairs (localcode, unicode). - *) - - let read_unimap_line() = - let s = input_line f in (* may raise End_of_file *) - let s' = Str.global_replace comment_re "" s in - let words = Str.split space_re s' in - match words with - [] -> raise Not_found - | [ localcode; unicode ] -> - int_of_string localcode, int_of_string unicode - | _ -> - failwith ("File " ^ fname ^ ": Do not know what to do with:\n" ^ s') - in - - let rec read_following_lines() = - try - let localcode, unicode = read_unimap_line() in - (* may raise End_of_file, Not_found *) - (localcode, unicode) :: read_following_lines() - with - Not_found -> read_following_lines() - | End_of_file -> [] - in - - read_following_lines() -;; - - -type from_uni_list = - U_nil - | U_single of (int * int) - | U_list of (int * int) list - -type from_unicode = - from_uni_list array;; - (* A hashtable with fixed size (256). A pair (unicode, localcode) is - * stored at the position unicode mod 256 in the array. - *) - - -let make_bijection unimap = - (* unimap: a list of pairs (localcode, unicode) - * returns a pair of arrays (m_to_unicode, m_from_unicode) with: - * - m_to_unicode.(localcode) = Some unicode, - * if the pair (localcode, unicode) exists - * m_to_unicode.(x) = None otherwise - * - m_from_unicode.(unicode lsr 8) = [ ...; (unicode,localcode); ... ] - *) - - let m_to_unicode = Array.create 256 None in - let m_from_unicode = Array.create 256 [] in - - List.iter - (fun (localcode, unicode) -> - assert(localcode < 256); - - (* Update m_to_unicode: *) - if m_to_unicode.(localcode) <> None then - failwith ("Local code point " ^ string_of_int localcode ^ - " mapped twice"); - m_to_unicode.(localcode) <- Some unicode; - - (* Update m_from_unicode: *) - let unilow = unicode land 255 in - if List.mem_assoc unicode (m_from_unicode.(unilow)) then - failwith ("Unicode code point " ^ string_of_int unicode ^ - " mapped twice"); - m_from_unicode.(unilow) <- - m_from_unicode.(unilow) @ [unicode,localcode]; - ) - unimap; - - m_to_unicode, m_from_unicode -;; - - -let to_unimap_as_string to_unimap = - let make_repr x = - match x with - None -> -1 - | Some u -> u - in - Marshal.to_string (Array.map make_repr to_unimap) [ Marshal.No_sharing ] -;; - - -let from_unimap_as_string from_unimap = - let make_repr l = - match l with - [] -> U_nil - | [u,l] -> U_single(u,l) - | _ -> U_list l - in - let m = Array.map make_repr from_unimap in - Marshal.to_string m [ Marshal.No_sharing ] -;; - - -let print_bijection f name m_to_unicode m_from_unicode = - (* Prints on file f this O'Caml code: - * let _to_unicode = ... - * let _from_unicode = ... - *) - fprintf f "let %s_to_unicode = lazy (Marshal.from_string \"%s\" 0 : int array);;\n" - name - (String.escaped (to_unimap_as_string m_to_unicode)); - - fprintf f "let %s_from_unicode = lazy (Marshal.from_string \"%s\" 0 : Netmappings.from_uni_list array);;\n " - name - (String.escaped (from_unimap_as_string m_from_unicode)); -;; - - -let main() = - let files = ref [] in - let outch = ref (lazy stdout) in - Arg.parse - [ "-o", Arg.String (fun s -> outch := lazy (open_out s)), - " Write result to this file"] - (fun s -> files := !files @ [s]) - "usage: unimap_to_ocaml file.unimap ..."; - - (* First read in all unimaps: *) - let unimaps = - List.map - (fun filename -> - let mapname = Str.replace_first (Str.regexp "\.unimap$") "" - (Filename.basename filename) in - let f = open_in filename in - prerr_endline ("Reading " ^ filename); - let unimap = read_unimap_format_a filename f in - close_in f; - mapname, unimap - ) - !files - in - - (* Second compute all bijections: *) - let bijections = - List.map - (fun (mapname, unimap) -> - prerr_endline ("Processing " ^ mapname); - let to_unicode, from_unicode = make_bijection unimap in - mapname, to_unicode, from_unicode - ) - unimaps - in - - let out = Lazy.force !outch in - (* Third output all results: *) - output_string out "(* WARNING! This is a generated file! *)\n"; - - List.iter - (fun (mapname, to_unicode, from_unicode) -> - print_bijection out mapname to_unicode from_unicode) - bijections; - List.iter - (fun (mapname, _, _) -> - fprintf out "Hashtbl.add Netmappings.to_unicode `Enc_%s %s_to_unicode;\n" - mapname mapname; - fprintf out "Hashtbl.add Netmappings.from_unicode `Enc_%s %s_from_unicode;\n" - mapname mapname; - ) - (List.rev bijections); - fprintf out "();;\n"; - - close_out out -;; - - -main();; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:29 lpadovan - * Initial revision - * - * Revision 1.3 2000/08/29 00:48:52 gerd - * Conversion tables are now stored in marshalled form. - * New type for the conversion table Unicode to 8bit. - * - * Revision 1.2 2000/08/12 23:54:56 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/ocaml-findlib-0.4.0-1.i386.rpm b/helm/DEVEL/pxp/ocaml-findlib-0.4.0-1.i386.rpm deleted file mode 100644 index 1877eeaba..000000000 Binary files a/helm/DEVEL/pxp/ocaml-findlib-0.4.0-1.i386.rpm and /dev/null differ diff --git a/helm/DEVEL/pxp/ocaml-findlib-0.4.0-1.src.rpm b/helm/DEVEL/pxp/ocaml-findlib-0.4.0-1.src.rpm deleted file mode 100644 index 6ae4bb227..000000000 Binary files a/helm/DEVEL/pxp/ocaml-findlib-0.4.0-1.src.rpm and /dev/null differ diff --git a/helm/DEVEL/pxp/ocaml-findlib.spec b/helm/DEVEL/pxp/ocaml-findlib.spec deleted file mode 100644 index 6d5cc6b96..000000000 --- a/helm/DEVEL/pxp/ocaml-findlib.spec +++ /dev/null @@ -1,80 +0,0 @@ -%define toolname findlib - -Summary: OCAML FindLib package manager -Name: ocaml-%{toolname} -Version: 0.4.0 -Release: 1 -Copyright: GPL-like -Group: Development/Languages -Source: http://www.ocaml-programming.de/packages/%{toolname}-%{version}.tar.gz -Vendor: Gerd Stolpmann -Url: http://www.ocaml-programming.de/packages/documentation/%{toolname}/ -Prereq: fileutils, ocaml -Requires: fileutils, ocaml - -%define dir_man usr/man -%define dir_bin usr/bin -%define dir_sitelib usr/lib/ocaml/site-lib -%define files_doc LICENSE README INSTALL - -BuildRoot: /tmp/root-%{name} - -%description -Provides a scheme to manage reusable software components (packages), -as collections of OCaml modules for which metainformation can be stored. -The library contains functions to look the directory up that -stores a package, to query metainformation about a package, and -to retrieve dependency information about multiple packages. -Metainformation includes a version string, the archives the package consists of, additional linker -options, and dependencies dependent on other packages. - -%prep -%setup -n %{toolname} -./configure -mandir "/%{dir_man}" -bindir "/%{dir_bin}" -sitelib "/%{dir_sitelib}" - -%build -make all -make opt - -%install -# Install binary, libs, manuals -DIR_BIN="${RPM_BUILD_ROOT}/%{dir_bin}" -DIR_MAN="${RPM_BUILD_ROOT}/%{dir_man}" -DIR_SITELIB="${RPM_BUILD_ROOT}/%{dir_sitelib}" -install -m 755 -d "${DIR_BIN}" -install -m 755 -d "${DIR_MAN}" -install -m 755 -d "${DIR_SITELIB}" -make install "OCAML_SITELIB=${DIR_SITELIB}" "OCAMLFIND_BIN=${DIR_BIN}" "OCAMLFIND_MAN=${DIR_MAN}" -# Move doc files to root, if needed -for F in %{files_doc} ; do test -f "./doc/${F}" && mv -f "./doc/${F}" . ; done - -# HTML manual -if test -d doc/html ; then mv doc/html htmlman; else mkdir htmlman ; fi - -%post -# Create a symbolic link to version-specific HTML manual -cd /usr/doc/HTML/ -if test -L "%{name}" ; then rm -f "%{name}" ; fi -if test ! -e "%{name}" ; then ln -s "../%{name}-%{version}/htmlman" "%{name}" ; fi - -%postun -cd /usr/doc/HTML/ -if test "$1" = "0" -a -L %{name} ; then rm -f %{name} ; fi - - -%clean -if test `dirname "${RPM_BUILD_ROOT}"` != "/" ; then rm -rf "${RPM_BUILD_ROOT}" ; fi - -%files -%defattr(-,root,root) -%doc %{files_doc} htmlman -/%{dir_bin} -/%{dir_man}/man1 -/%{dir_man}/man3 -/%{dir_man}/man5 -/%{dir_sitelib} - - -%changelog -* Fri Sep 1 2000 Olivier Montanuy -- created and tested package, with html manual diff --git a/helm/DEVEL/pxp/ocaml-netstring-0.9.3-2.i386.rpm b/helm/DEVEL/pxp/ocaml-netstring-0.9.3-2.i386.rpm deleted file mode 100644 index e9dc283f0..000000000 Binary files a/helm/DEVEL/pxp/ocaml-netstring-0.9.3-2.i386.rpm and /dev/null differ diff --git a/helm/DEVEL/pxp/ocaml-netstring-0.9.3-2.src.rpm b/helm/DEVEL/pxp/ocaml-netstring-0.9.3-2.src.rpm deleted file mode 100644 index 3c20f54f2..000000000 Binary files a/helm/DEVEL/pxp/ocaml-netstring-0.9.3-2.src.rpm and /dev/null differ diff --git a/helm/DEVEL/pxp/ocaml-netstring.spec b/helm/DEVEL/pxp/ocaml-netstring.spec deleted file mode 100644 index 073539989..000000000 --- a/helm/DEVEL/pxp/ocaml-netstring.spec +++ /dev/null @@ -1,73 +0,0 @@ -%define toolname netstring - -Summary: OCAML Netstring library -Name: ocaml-%{toolname} -Version: 0.9.3 -Release: 2 -Copyright: GPL-like -Group: Development/Languages -Source: http://www.ocaml-programming.de/packages/%{toolname}-%{version}.tar.gz -Vendor: Gerd Stolpmann -Url: http://www.ocaml-programming.de/packages/documentation/%{toolname}/ -Prereq: fileutils, ocaml, ocaml-findlib -Requires: fileutils, ocaml - -%define dir_sitelib usr/lib/ocaml/site-lib -%define files_doc LICENSE README INSTALL -BuildRoot: /tmp/root-%{name} - -%description -A collection of string processing functions for Internet protocols -- Parse MIME messages -- Encode/decode Base 64, Quoted Printable, Q, URL-encoding -- CGI interface that allows users to upload files -- Simple HTML parser -- URL parsing, printing and processing - -%prep -%setup -n %{toolname} -make clean - -%build -make all -make opt - -%install -# Install binary, libs, manuals - -DIR_INSTALL="${RPM_BUILD_ROOT}/%{dir_sitelib}/%{toolname}" -install -m 755 -d "${DIR_INSTALL}" -# Install in non-standard directory -# replace "$(OCAMLFIND) install" or "ocamlfind install" -cat Makefile | sed "s#[_A-Za-z\(\)\$]* install \$(NAME) #\$(TRICK) #" > Makefile.trick -# Ugly trick: replace "findlib" by "cp" -make -f Makefile.trick install "TRICK=cp -f --target-directory=${DIR_INSTALL}" -# Reference to obsolete CGI and BASE64 packages -for CMD in cgi base64 ; do - cat Makefile | sed "s#[_A-Za-z\(\)\$]* install $CMD #\$(TRICK) #" > Makefile.trick - DIR="${RPM_BUILD_ROOT}/%{dir_sitelib}/${CMD}" - install -m 755 -d "${DIR}" - make -f Makefile.trick "install-${CMD}" "TRICK=cp -f --target-directory=${DIR}" -done - -# Move doc files to root, if needed -for F in %{files_doc} ; do test -f "./doc/${F}" && mv -f "./doc/${F}" . ; done - -%clean -#if test `dirname "${RPM_BUILD_ROOT}"` != "/" ; then rm -rf "${RPM_BUILD_ROOT}" ; fi - -%files -%defattr(-,root,root) -%doc %{files_doc} -/%{dir_sitelib}/%{toolname} -# Reference to obsolete CGI and BASE64 packages -/%{dir_sitelib}/cgi -/%{dir_sitelib}/base64 - -%changelog -* Wed Sep 6 2000 Olivier Montanuy -- attempt to install cgi and base64 modules, for obsolete Makefiles - -* Fri Sep 1 2000 Olivier Montanuy -- created and tested package - diff --git a/helm/DEVEL/pxp/ocaml-pxp-1.0-1.i386.rpm b/helm/DEVEL/pxp/ocaml-pxp-1.0-1.i386.rpm deleted file mode 100644 index 3dac2d9dd..000000000 Binary files a/helm/DEVEL/pxp/ocaml-pxp-1.0-1.i386.rpm and /dev/null differ diff --git a/helm/DEVEL/pxp/ocaml-pxp-1.0-1.src.rpm b/helm/DEVEL/pxp/ocaml-pxp-1.0-1.src.rpm deleted file mode 100644 index c00caec41..000000000 Binary files a/helm/DEVEL/pxp/ocaml-pxp-1.0-1.src.rpm and /dev/null differ diff --git a/helm/DEVEL/pxp/ocaml-pxp.spec b/helm/DEVEL/pxp/ocaml-pxp.spec deleted file mode 100644 index ee2080d94..000000000 --- a/helm/DEVEL/pxp/ocaml-pxp.spec +++ /dev/null @@ -1,73 +0,0 @@ -%define toolname pxp - -Summary: OCAML PXP XML library -Name: ocaml-%{toolname} -Version: 1.0 -Release: 1 -Copyright: GPL-like -Group: Development/Languages -Source: http://www.ocaml-programming.de/packages/%{toolname}-%{version}.tar.gz -Vendor: Gerd Stolpmann -Url: http://www.ocaml-programming.de/packages/documentation/%{toolname}/ -Prereq: fileutils, ocaml, ocaml-findlib, ocaml-netstring -Requires: fileutils, ocaml, ocaml-netstring - -%define dir_sitelib usr/lib/ocaml/site-lib -%define files_doc LICENSE README INSTALL SPEC EXTENSIONS - -BuildRoot: /tmp/root-%{name} - -%description -PXP is a validating parser for XML-1.0 written entirely in Objective Caml. -PXP stands for Polymorphic XML parser, emphasizes its most useful property: -the API is polymorphic and can be configured such that different objects are -used to store different types of elements. -PXP was formerly known as "Markup". - -%prep -%setup -n %{toolname} -make clean - -%build -make all -make opt - -%install -# Install binary, libs, manuals - -DIR_INSTALL="${RPM_BUILD_ROOT}/%{dir_sitelib}/%{toolname}" -install -m 755 -d "${DIR_INSTALL}" -# Install in non-standard directory -# replace "$(OCAMLFIND) install" or "ocamlfind install" -cat Makefile | sed "s#[_A-Za-z\(\)\$]* install \$(NAME)#\$(TRICK)#" > Makefile.trick -# Ugly trick: replace "findlib" by "cp" -make -f Makefile.trick install "TRICK=cp -f --target-directory=${DIR_INSTALL}" - -# Move doc files to root, if needed -for F in %{files_doc} ; do test -f "./doc/${F}" && mv -f "./doc/${F}" . ; done - -# HTML manual -if test -d doc/manual/html ; then mv doc/manual/html htmlman; else mkdir htmlman ; fi - - -# Create a symbolic link to version-specific HTML manual -%post -cd /usr/doc/HTML/ -if test -L "%{name}" ; then rm -f "%{name}" ; fi -if test ! -e "%{name}" ; then ln -s "../%{name}-%{version}/htmlman" "%{name}" ; fi - -%postun -cd /usr/doc/HTML/ -if test "$1" = "0" -a -L %{name} ; then rm -f %{name} ; fi - -%clean -if test `dirname "${RPM_BUILD_ROOT}"` != "/" ; then rm -rf "${RPM_BUILD_ROOT}" ; fi - -%files -%defattr(-,root,root) -%doc %{files_doc} htmlman examples -/%{dir_sitelib}/%{toolname} - -%changelog -* Fri Sep 1 2000 Olivier Montanuy -- created and tested package diff --git a/helm/DEVEL/pxp/pxp-1.0.tar.gz b/helm/DEVEL/pxp/pxp-1.0.tar.gz deleted file mode 100644 index 9f6e01955..000000000 Binary files a/helm/DEVEL/pxp/pxp-1.0.tar.gz and /dev/null differ diff --git a/helm/DEVEL/pxp/pxp/.cvsignore b/helm/DEVEL/pxp/pxp/.cvsignore deleted file mode 100644 index deb5b7fba..000000000 --- a/helm/DEVEL/pxp/pxp/.cvsignore +++ /dev/null @@ -1,4 +0,0 @@ -*.cmo -*.cmx -*.cmi - diff --git a/helm/DEVEL/pxp/pxp/LICENSE b/helm/DEVEL/pxp/pxp/LICENSE deleted file mode 100644 index 55182a74d..000000000 --- a/helm/DEVEL/pxp/pxp/LICENSE +++ /dev/null @@ -1,22 +0,0 @@ -Copyright 1999 by Gerd Stolpmann - -The package "markup" is copyright by Gerd Stolpmann. - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this document and the "markup" software (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be included -in all copies or substantial portions of the Software. - -The Software is provided ``as is'', without warranty of any kind, express -or implied, including but not limited to the warranties of -merchantability, fitness for a particular purpose and noninfringement. -In no event shall Gerd Stolpmann be liable for any claim, damages or -other liability, whether in an action of contract, tort or otherwise, -arising from, out of or in connection with the Software or the use or -other dealings in the software. diff --git a/helm/DEVEL/pxp/pxp/META b/helm/DEVEL/pxp/pxp/META deleted file mode 100644 index 020128a0d..000000000 --- a/helm/DEVEL/pxp/pxp/META +++ /dev/null @@ -1,20 +0,0 @@ -version = "1.0" -requires = "netstring" -description = "Validating parser for XML-1.0" -archive(byte) = "pxp_types.cma - pxp_lex_iso88591.cma - pxp_lex_utf8.cma - pxp_engine.cma - pxp_utf8.cmo" -archive(byte, pxp_without_utf8) = "pxp_types.cma - pxp_lex_iso88591.cma - pxp_engine.cma" -archive(native) = "pxp_types.cmxa - pxp_lex_iso88591.cmxa - pxp_lex_utf8.cmxa - pxp_engine.cmxa - pxp_utf8.cmx" -archive(native, pxp_without_utf8) = "pxp_types.cmxa - pxp_lex_iso88591.cmxa - pxp_engine.cmxa" - diff --git a/helm/DEVEL/pxp/pxp/Makefile b/helm/DEVEL/pxp/pxp/Makefile deleted file mode 100644 index f08eab99d..000000000 --- a/helm/DEVEL/pxp/pxp/Makefile +++ /dev/null @@ -1,105 +0,0 @@ -# make all: make bytecode archive -# make opt: make native archive -# make install: install bytecode archive, and if present, native archive -# make uninstall: uninstall package -# make clean: remove intermediate files (in this directory) -# make CLEAN: remove intermediate files (recursively) -# make distclean: remove any superflous files (recursively) -# make release: cleanup, create archive, tag CVS module -# (for developers) - -#---------------------------------------------------------------------- - -include Makefile.conf - -.PHONY: all -all: - $(MAKE) -C m2parsergen all - $(MAKE) -C tools/ucs2_to_utf8 all - $(MAKE) -f Makefile.code all - $(MAKE) -C compatibility all - -.PHONY: opt -opt: - $(MAKE) -C m2parsergen all - $(MAKE) -C tools/ucs2_to_utf8 all - $(MAKE) -f Makefile.code opt - $(MAKE) -C compatibility opt - -.PHONY: install -install: all tmp/pxp_entity.mli - files=`tools/collect_files *.cmi *.cma *.cmxa *.a \ - pxp_utf8.cmo pxp_utf8.cmx pxp_utf8.o` && \ - ocamlfind install $(NAME) $(MLI) tmp/pxp_entity.mli $$files META - -.PHONY: uninstall -uninstall: - ocamlfind remove $(NAME) - -.PHONY: markup-install -markup-install: - $(MAKE) -C compatibility install - -.PHONY: markup-uninstall -markup-uninstall: - $(MAKE) -C compatibility uninstall - -tmp/pxp_entity.mli: pxp_entity.ml - mkdir -p tmp - rm -f tmp/pxp_entity.* - cp pxp_entity.ml tmp - echo '(* Sorry, this is currently undocumented *)' >tmp/mli - ocamlc -i -c tmp/pxp_entity.ml >>tmp/mli - mv tmp/mli tmp/pxp_entity.mli - -.PHONY: clean -clean: - rm -f *.cmi *.cmo *.cma *.cmx *.o *.a *.cmxa *.new *.old - rm -f pxp_yacc.ml - touch lexers/objects_iso88591 lexers/objects_utf8 lexers/depend - $(MAKE) -C lexers clean - $(MAKE) -C compatibility clean - -.PHONY: CLEAN -CLEAN: clean - $(MAKE) -C doc CLEAN - $(MAKE) -C examples CLEAN - $(MAKE) -C rtests CLEAN - $(MAKE) -C m2parsergen CLEAN - touch tools/ucs2_to_utf8/depend - $(MAKE) -C tools/ucs2_to_utf8 clean - -.PHONY: distclean -distclean: clean - rm -f *~ depend depend.pkg - $(MAKE) -C doc distclean - $(MAKE) -C examples distclean - $(MAKE) -C rtests distclean - $(MAKE) -C m2parsergen distclean - touch tools/ucs2_to_utf8/depend - $(MAKE) -C tools/ucs2_to_utf8 clean - $(MAKE) -C compatibility distclean - -RELEASE: META - awk '/version/ { print substr($$3,2,length($$3)-2) }' META >RELEASE - -.PHONY: dist -dist: RELEASE - r=`head -1 RELEASE`; cd ..; gtar czf $(NAME)-$$r.tar.gz --exclude='*/CVS*' --exclude="*~" --exclude="*/depend.pkg" --exclude="*/depend" --exclude="*/oo_questions*" --exclude="*/testsamples*" --exclude="*/tmp/*" --exclude="*reptil*" --exclude="*/doc/common.xml" --exclude="*/doc/config.xml" --exclude="*.fig.bak" --exclude="*/ps/pic*" --exclude="*/examples/panel*" --exclude="*/examples/xmlforms_gtk*" --exclude="*/Mail*" $(NAME)/* - -.PHONY: tag-release -tag-release: RELEASE - r=`head -1 RELEASE | sed -e s/\\\./-/g`; cd ..; cvs tag -F $(NAME)-$$r markup - -.PHONY: release -release: distclean - $(MAKE) tag-release - $(MAKE) dist - -.PHONY: dev -dev: - $(MAKE) all - -$(MAKE) uninstall - $(MAKE) install - $(MAKE) -C examples/validate distclean - $(MAKE) -C examples/validate validate diff --git a/helm/DEVEL/pxp/pxp/Makefile.code b/helm/DEVEL/pxp/pxp/Makefile.code deleted file mode 100644 index 3afed39ca..000000000 --- a/helm/DEVEL/pxp/pxp/Makefile.code +++ /dev/null @@ -1,96 +0,0 @@ -# make all: make bytecode archives -# make opt: make native archives -#---------------------------------------------------------------------- - -include Makefile.conf - -all: - $(MAKE) -f Makefile.code pxp_types.cma - $(MAKE) -f Makefile.code pxp_lex_iso88591.cma - if [ "x$(UTF8_SUPPORT)" = "xyes" ]; then $(MAKE) -f Makefile.code pxp_lex_utf8.cma; else rm -f pxp_lex_utf8.cma; fi - $(MAKE) -f Makefile.code pxp_engine.cma - if [ "x$(UTF8_SUPPORT)" = "xyes" ]; then $(MAKE) -f Makefile.code pxp_utf8.cmo; else rm -f pxp_utf8.cmo; fi - -opt: - $(MAKE) -f Makefile.code pxp_types.cmxa - $(MAKE) -f Makefile.code pxp_lex_iso88591.cmxa - if [ "x$(UTF8_SUPPORT)" = "xyes" ]; then $(MAKE) -f Makefile.code pxp_lex_utf8.cmxa; else rm -f pxp_lex_utf8.cmxa; fi - $(MAKE) -f Makefile.code pxp_engine.cmxa - if [ "x$(UTF8_SUPPORT)" = "xyes" ]; then $(MAKE) -f Makefile.code pxp_utf8.cmx; else rm -f pxp_utf8.cmx; fi - -#---------------------------------------------------------------------- - -pxp_types.cma: $(OBJECTS_types) - $(OCAMLC) -a -o pxp_types.cma $(OBJECTS_types) - -pxp_types.cmxa: $(XOBJECTS_types) - $(OCAMLOPT) -a -o pxp_types.cmxa $(XOBJECTS_types) - -pxp_engine.cma: $(OBJECTS_engine) - $(OCAMLC) -a -o pxp_engine.cma $(OBJECTS_engine) - -pxp_engine.cmxa: $(XOBJECTS_engine) - $(OCAMLOPT) -a -o pxp_engine.cmxa $(XOBJECTS_engine) - - -# The following rules are "phony" to force 'make' to go into the -# "lexers" subdirectory. - -.PHONY: pxp_lex_iso88591.cma -pxp_lex_iso88591.cma: $(CMI_types) - $(MAKE) -C lexers all_iso88591 - cp lexers/pxp_lex_iso88591.cma . - -.PHONY: pxp_lex_iso88591.cmxa -pxp_lex_iso88591.cmxa: $(CMI_types) - $(MAKE) -C lexers opt_iso88591 - cp lexers/pxp_lex_iso88591.cmxa lexers/pxp_lex_iso88591.a . - -.PHONY: pxp_lex_utf8.cma -pxp_lex_utf8.cma: $(CMI_types) - $(MAKE) -C lexers all_utf8 - cp lexers/pxp_lex_utf8.cma . - -.PHONY: pxp_lex_utf8.cmxa -pxp_lex_utf8.cmxa: $(CMI_types) - $(MAKE) -C lexers opt_utf8 - cp lexers/pxp_lex_utf8.cmxa lexers/pxp_lex_utf8.a . - -#---------------------------------------------------------------------- -# general rules: - -OPTIONS = -OCAMLC = $(OCAMLFIND) ocamlc -package "$(PACKAGES)" \ - -g -I lexers $(OPTIONS) $(ROPTIONS) -OCAMLOPT = $(OCAMLFIND) ocamlopt -package "$(PACKAGES)" \ - -p -I lexers $(OPTIONS) $(ROPTIONS) -OCAMLDEP = ocamldep $(OPTIONS) -OCAMLFIND = ocamlfind - -depend: *.ml *.mli pxp_yacc.ml - $(OCAMLDEP) *.ml *.mli >depend - -.SUFFIXES: .cmo .cmi .cmx .ml .mli .mll .m2y - -.ml.cmx: - $(OCAMLOPT) -c $< - -.ml.cmo: - $(OCAMLC) -c $< - -.mli.cmi: - $(OCAMLC) -c $< - -.mll.ml: - ocamllex $< - -.m2y.ml: - ./m2parsergen/m2parsergen < $< >`basename $< .m2y`.ml || { rm -f `basename $< .m2y`.ml; false; } - -*.mli: - - -# Generated dependencies: - -include depend - diff --git a/helm/DEVEL/pxp/pxp/Makefile.conf b/helm/DEVEL/pxp/pxp/Makefile.conf deleted file mode 100644 index 749c702c7..000000000 --- a/helm/DEVEL/pxp/pxp/Makefile.conf +++ /dev/null @@ -1,37 +0,0 @@ -# User-configurable section: - -# yes or no: Do you want that the parser has support for the internal -# representation as UTF-8 strings? "yes" is recommended, but the parser -# becomes much bigger -UTF8_SUPPORT = yes - -# --- End of User-configurable section. - -# Settings. - -NAME = pxp -PACKAGES = netstring - -# Caml objects that are needed by the lexers: -OBJECTS_types = \ - pxp_types.cmo pxp_lexer_types.cmo - -CMI_types = $(OBJECTS_types:.cmo=.cmi) - -# Caml objects that depend on the lexers: -OBJECTS_engine = \ - pxp_lexers.cmo \ - pxp_dfa.cmo \ - pxp_aux.cmo pxp_reader.cmo \ - pxp_entity.cmo pxp_dtd.cmo pxp_document.cmo \ - pxp_yacc.cmo pxp_codewriter.cmo - -# Same as native objects: -XOBJECTS_types = $(OBJECTS_types:.cmo=.cmx) -XOBJECTS_engine = $(OBJECTS_engine:.cmo=.cmx) - -# .mli files to install: - -MLI = pxp_document.mli pxp_dtd.mli \ - pxp_types.mli pxp_yacc.mli \ - pxp_codewriter.mli pxp_dfa.mli diff --git a/helm/DEVEL/pxp/pxp/RELEASE b/helm/DEVEL/pxp/pxp/RELEASE deleted file mode 100644 index d3827e75a..000000000 --- a/helm/DEVEL/pxp/pxp/RELEASE +++ /dev/null @@ -1 +0,0 @@ -1.0 diff --git a/helm/DEVEL/pxp/pxp/compatibility/.cvsignore b/helm/DEVEL/pxp/pxp/compatibility/.cvsignore deleted file mode 100644 index deb5b7fba..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/.cvsignore +++ /dev/null @@ -1,4 +0,0 @@ -*.cmo -*.cmx -*.cmi - diff --git a/helm/DEVEL/pxp/pxp/compatibility/META b/helm/DEVEL/pxp/pxp/compatibility/META deleted file mode 100644 index 441e30a0f..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/META +++ /dev/null @@ -1,6 +0,0 @@ -version = "PXP-emulator" -requires = "pxp" -description = "Validating parser for XML-1.0" -archive(byte) = "markup.cma" -archive(native) = "markup.cmxa" - diff --git a/helm/DEVEL/pxp/pxp/compatibility/Makefile b/helm/DEVEL/pxp/pxp/compatibility/Makefile deleted file mode 100644 index 187116ccb..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/Makefile +++ /dev/null @@ -1,40 +0,0 @@ -# make all: make bytecode archive -# make opt: make native archive -# make install: install bytecode archive, and if present, native archive -# make uninstall: uninstall package -# make clean: remove intermediate files (in this directory) -# make CLEAN: remove intermediate files (recursively) -# make distclean: remove any superflous files (recursively) - -#---------------------------------------------------------------------- - -include Makefile.conf - -.PHONY: all -all: - $(MAKE) -f Makefile.code all - -.PHONY: opt -opt: - $(MAKE) -f Makefile.code opt - -.PHONY: install -install: all - files=`../tools/collect_files *.cmi *.cma *.cmxa *.a` && \ - ocamlfind install $(NAME) $(MLI) $$files META - -.PHONY: uninstall -uninstall: - ocamlfind remove $(NAME) - -.PHONY: clean -clean: - rm -f *.cmi *.cmo *.cma *.cmx *.o *.a *.cmxa *.new *.old - -.PHONY: CLEAN -CLEAN: clean - -.PHONY: distclean -distclean: clean - rm -f *~ depend depend.pkg - diff --git a/helm/DEVEL/pxp/pxp/compatibility/Makefile.code b/helm/DEVEL/pxp/pxp/compatibility/Makefile.code deleted file mode 100644 index 2733faa09..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/Makefile.code +++ /dev/null @@ -1,50 +0,0 @@ -# make all: make bytecode archives -# make opt: make native archives -#---------------------------------------------------------------------- - -include Makefile.conf - -.PHONY: all -all: markup.cma - -.PHONY: opt -opt: markup.cmxa - -#---------------------------------------------------------------------- - -markup.cma: $(OBJECTS) - $(OCAMLC) -a -o markup.cma $(OBJECTS) - -markup.cmxa: $(XOBJECTS) - $(OCAMLOPT) -a -o markup.cmxa $(XOBJECTS) - -#---------------------------------------------------------------------- -# general rules: - -OPTIONS = -OCAMLC = ocamlfind ocamlc -g -I .. -package netstring $(OPTIONS) $(ROPTIONS) -OCAMLOPT = ocamlfind ocamlopt -p -I .. -package netstring $(OPTIONS) $(ROPTIONS) -OCAMLDEP = ocamldep $(OPTIONS) -OCAMLFIND = ocamlfind - -depend: *.ml *.mli - $(OCAMLDEP) *.ml *.mli >depend - -.SUFFIXES: .cmo .cmi .cmx .ml .mli - -.ml.cmx: - $(OCAMLOPT) -c $< - -.ml.cmo: - $(OCAMLC) -c $< - -.mli.cmi: - $(OCAMLC) -c $< - -*.mli: - - -# Generated dependencies: - -include depend - diff --git a/helm/DEVEL/pxp/pxp/compatibility/Makefile.conf b/helm/DEVEL/pxp/pxp/compatibility/Makefile.conf deleted file mode 100644 index 061d0cae1..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/Makefile.conf +++ /dev/null @@ -1,9 +0,0 @@ -NAME = markup - -OBJECTS = markup_types.cmo markup_dtd.cmo markup_reader.cmo \ - markup_document.cmo markup_yacc.cmo -XOBJECTS = $(OBJECTS:.cmo=.cmx) - -MLI = markup_document.mli markup_dtd.mli \ - markup_types.mli markup_yacc.mli markup_reader.mli - diff --git a/helm/DEVEL/pxp/pxp/compatibility/README b/helm/DEVEL/pxp/pxp/compatibility/README deleted file mode 100644 index 50086732a..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/README +++ /dev/null @@ -1,21 +0,0 @@ -This directory contains the modules for Markup-0.2.10 -compatibility. The modules consist mainly of wrapper classes for the -new PXP classes, and translate the old methods to the new ones. - -Please note that the compatibility is not perfect. Sometimes there are -new methods which do not exist in Markup-0.2.10, and sometimes even -existing methods changed their signature. I have tried to avoid that, -but there are some ugly cases which are hard to solve without such -modifications. - -Translating old methods into new methods costs time and -memory. Because of this, it is best to consider the compatibility -modules as migration path to PXP: You can test whether PXP parses your -input files, and you can compare the old API with the new API -directly. (However, it is hard to test new features of PXP with the -compatibility modules; the old API does not reflect the new features.) - -The compatibility modules are currently maintained, but that will stop -once PXP has been established. - -(Gerd) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_document.ml b/helm/DEVEL/pxp/pxp/compatibility/markup_document.ml deleted file mode 100644 index bbc497953..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_document.ml +++ /dev/null @@ -1,374 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - *) - -type node_type = - T_element of string - | T_data - -class type [ 'node ] extension = [ 'node ] Pxp_document.extension - -class type [ 'ext, 'node ] pxp_extension_type = -object ('self) - method clone : 'self - method node : 'self Pxp_document.node - method set_node : 'self Pxp_document.node -> unit - - method markup_node : 'node - method set_markup_node : 'node -> unit - - method set_index : 'self Pxp_yacc.index -> unit - method index : 'self Pxp_yacc.index - end -;; - - -class type [ 'ext ] node = - object ('self) - constraint 'ext = 'ext node #extension - method pxp_node : (('ext, 'ext node) pxp_extension_type) Pxp_document.node - - method extension : 'ext - method delete : unit - method parent : 'ext node - method root : 'ext node - method orphaned_clone : 'ext node - method orphaned_flat_clone : 'ext node - method add_node : 'ext node -> unit - method add_pinstr : Markup_dtd.proc_instruction -> unit - method pinstr : string -> Markup_dtd.proc_instruction list - method pinstr_names : string list - method sub_nodes : 'ext node list - method iter_nodes : ('ext node -> unit) -> unit - method iter_nodes_sibl : - ('ext node option -> 'ext node -> 'ext node option -> unit) -> unit - method set_nodes : 'ext node list -> unit - method data : string - method node_type : node_type - method attribute : string -> Markup_types.att_value - method attribute_names : string list - method attribute_type : string -> Markup_types.att_type - method attributes : (string * Markup_types.att_value) list - method required_string_attribute : string -> string - method required_list_attribute : string -> string list - method optional_string_attribute : string -> string option - method optional_list_attribute : string -> string list - method quick_set_attributes : (string * Markup_types.att_value) list -> unit - method find : string -> 'ext node - method reset_finder : unit - method dtd : Markup_dtd.dtd - method create_element : - Markup_dtd.dtd -> node_type -> (string * string) list -> 'ext node - method create_data : Markup_dtd.dtd -> string -> 'ext node - method local_validate : unit - method keep_always_whitespace_mode : unit - method write_compact_as_latin1 : Markup_types.output_stream -> unit - method internal_adopt : 'ext node option -> unit - method internal_delete : 'ext node -> unit - method internal_init : Markup_dtd.dtd -> string -> (string * string) list -> unit - end -;; - - -class [ 'ext ] pxp_extension init_markup_node = - (object (self : 'self) - (* constraint 'ext = 'ext node #extension *) - val mutable pxp_node = (None : - 'self Pxp_document.node option) - (* 'ext pxp_extension Pxp_document.node option *) - val mutable markup_node = (init_markup_node : 'ext node) - - val mutable index = (None : 'self Pxp_yacc.index option) - - method clone = - {< >} - - method node = - match pxp_node with - None -> - assert false - | Some n -> n - - method set_node n = - pxp_node <- Some n - - method markup_node = markup_node - - method set_markup_node n = markup_node <- n - - method set_index ix = - index <- Some ix - - method index = - match index with - None -> assert false - | Some x -> x - - end - : ['ext, 'ext node] pxp_extension_type ) -;; - - -class [ 'ext ] emulate_markup_node init_ext init_pxp_node = - object (self) - constraint 'ext = 'ext node #extension - val mutable pxp_node = (init_pxp_node : - ('ext, 'ext #node) - pxp_extension_type Pxp_document.node option) - val mutable extension = (init_ext : 'ext) - - method pxp_node = - match pxp_node with - None -> assert false - | Some n -> n - - method extension = extension - method delete = self # pxp_node # delete - method parent = self # pxp_node # parent # extension # markup_node - method root = self # pxp_node # root # extension # markup_node - - method orphaned_clone = - let ext' = extension # clone in - let pxp' = self # pxp_node # orphaned_clone in - let n = new emulate_markup_node ext' (Some pxp') in - ext' # set_node (n : 'ext #node :> 'ext node); - pxp' # extension # set_markup_node n; - n - - method orphaned_flat_clone = - let ext' = extension # clone in - let pxp' = self # pxp_node # orphaned_flat_clone in - let n = new emulate_markup_node ext' (Some pxp') in - ext' # set_node (n : 'ext #node :> 'ext node); - pxp' # extension # set_markup_node n; - n - - method dtd = self # pxp_node # dtd - - method add_node (n : 'ext node) = - let n_pxp = n # pxp_node in - self # pxp_node # add_node n_pxp - - method add_pinstr pi = - self # pxp_node # add_pinstr pi - - method sub_nodes = - let l = self # pxp_node # sub_nodes in - List.map (fun n_pxp -> n_pxp # extension # markup_node) l - - method pinstr name = - self # pxp_node # pinstr name - - method pinstr_names = - self # pxp_node # pinstr_names - - method iter_nodes f = - self # pxp_node # iter_nodes - (fun n_pxp -> f (n_pxp # extension # markup_node)) - - method iter_nodes_sibl f = - self # pxp_node # iter_nodes_sibl - (fun left_pxp node_pxp right_pxp -> - let left = - match left_pxp with - None -> None - | Some n_pxp -> Some (n_pxp # extension # markup_node) in - let right = - match right_pxp with - None -> None - | Some n_pxp -> Some (n_pxp # extension # markup_node) in - let node = - node_pxp # extension # markup_node in - f left node right - ) - - method set_nodes (l : 'ext node list) = - let l_pxp = List.map (fun n -> n # pxp_node) l in - self # pxp_node # set_nodes l_pxp - - method data = self # pxp_node # data - - method node_type = - match self # pxp_node # node_type with - Pxp_document.T_data -> T_data - | Pxp_document.T_element name -> T_element name - | Pxp_document.T_super_root -> T_element "-vr" - | Pxp_document.T_pinstr _ -> T_element "-pi" - | _ -> assert false - - method attribute name = - self # pxp_node # attribute name - - method attribute_names = - self # pxp_node # attribute_names - - method attribute_type name = - self # pxp_node # attribute_type name - - method attributes = - self # pxp_node # attributes - - method required_string_attribute name = - self # pxp_node # required_string_attribute name - - method required_list_attribute name = - self # pxp_node # required_list_attribute name - - method optional_string_attribute name = - self # pxp_node # optional_string_attribute name - - method optional_list_attribute name = - self # pxp_node # optional_list_attribute name - - method quick_set_attributes l = - self # pxp_node # quick_set_attributes l - - method find (name : string) = - let index = self # root # pxp_node # extension # index in - let n = index # find name in (* may raise Not_found *) - n # extension # markup_node - - method reset_finder = () - - method create_element dtd nt atts = - let nt_pxp = - match nt with - T_data -> Pxp_document.T_data - | T_element name -> Pxp_document.T_element name in - let node_pxp = - self # pxp_node # create_element dtd nt_pxp atts in - let ext' = extension # clone in - let n = new emulate_markup_node ext' (Some node_pxp) in - ext' # set_node (n : 'ext #node :> 'ext node); - node_pxp # extension # set_markup_node n; - n - - method create_data dtd s = - let node_pxp = - self # pxp_node # create_data dtd s in - let ext' = extension # clone in - let n = new emulate_markup_node ext' (Some node_pxp) in - ext' # set_node (n : 'ext #node :> 'ext node); - node_pxp # extension # set_markup_node n; - n - - method keep_always_whitespace_mode = - self # pxp_node # keep_always_whitespace_mode - - method write_compact_as_latin1 out = - self # pxp_node # write_compact_as_latin1 out - - method local_validate = - self # pxp_node # local_validate() - - method internal_adopt (p:'ext node option) = - assert false; - () - - method internal_delete (n:'ext node) = - assert false; - () - - method internal_init (d:Markup_dtd.dtd) (s:string) (atts:(string*string)list) = - assert false; - () - end -;; - -class [ 'ext ] data_impl ext data = - object (self) - inherit [ 'ext ] emulate_markup_node ext None - constraint 'ext = 'ext node #extension - initializer - if data <> "" then - failwith "Emulation of Markup_document: Cannot instantiate data node with non-empty string"; - let self' = (self : 'ext #node :> 'ext node ) in - pxp_node <- Some (new Pxp_document.data_impl (new pxp_extension self')) - - end -;; - -class [ 'ext ] element_impl ext = - object (self) - inherit [ 'ext ] emulate_markup_node ext None - initializer - let self' = (self : 'ext #node :> 'ext node ) in - pxp_node <- Some (new Pxp_document.element_impl (new pxp_extension self')) - end -;; - - -class [ 'ext ] document w = - object (self) - val pxp_doc = new Pxp_document.document - (w : Markup_types.collect_warnings :> Pxp_types.collect_warnings) - - val mutable standalone_flag = false - - method init_xml_version v = - pxp_doc # init_xml_version v - - method xml_version = - pxp_doc # xml_version - - method init_xml_standalone b = - standalone_flag <- b - - method xml_standalone = standalone_flag - - method init_root (r : 'ext node) = - pxp_doc # init_root (r # pxp_node); - self # dtd # set_standalone_declaration standalone_flag - (* questionable *) - - method root = - let pxp_root = pxp_doc # root in - pxp_root # extension # markup_node - - method dtd = - pxp_doc # dtd - - method add_pinstr pi = - pxp_doc # add_pinstr pi - - method pinstr name = - pxp_doc # pinstr name - - method pinstr_names = - pxp_doc # pinstr_names - - method write_compact_as_latin1 out = - pxp_doc # write_compact_as_latin1 out - - end -;; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.6 2000/08/18 20:19:00 gerd - * Changed the emulation: there are now wrapper objects for nodes. - * This was necessary because node_type changed in PXP such that it became - * incompatible with Markup's node_type. - * - * Revision 1.5 2000/07/14 21:35:35 gerd - * Updated because of the simplification of Pxp_types.collect_warnings. - * - * Revision 1.4 2000/07/08 17:40:50 gerd - * Updated the simulation. - * - * Revision 1.3 2000/06/14 22:19:27 gerd - * Update because of additional 'encoding' methods. - * - * Revision 1.2 2000/05/30 00:08:40 gerd - * Bugfix. - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - *) - diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_document.mli b/helm/DEVEL/pxp/pxp/compatibility/markup_document.mli deleted file mode 100644 index 2e37f0f22..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_document.mli +++ /dev/null @@ -1,420 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * Markup! The validating XML parser for Objective Caml. - * Copyright 1999 by Gerd Stolpmann. See LICENSE for details. - * - * THIS IS THE markup-0.2.10 COMPATIBLE INTERFACE TO markup_document.mli. - * It corresponds to revision 1.13 of markup_document.mli. - *) - -(**********************************************************************) -(* *) -(* Markup_document: *) -(* Object model of the document/element instances *) -(* *) -(**********************************************************************) - - -(* ====================================================================== - * OVERVIEW - * - * class type node ............. The common class type of the nodes of - * the element tree. Nodes are either - * elements (inner nodes) or data nodes - * (leaves) - * class type extension ........ The minimal properties of the so-called - * extensions of the nodes: Nodes can be - * customized by applying a class parameter - * that adds methods/values to nodes. - * class data_impl : node ...... Implements data nodes. - * class element_impl : node ... Implements element nodes - * class document .............. A document is an element with some additional - * properties - * - * ====================================================================== - * - * THE STRUCTURE OF NODE TREES: - * - * Every node except the root node has a parent node. The parent node is - * always an element, because data nodes never contain other nodes. - * In the other direction, element nodes may have children; both elements - * and data nodes are possible as children. - * Every node knows its parent (if any) and all its children (if any); - * the linkage is maintained in both directions. A node without a parent - * is called a root. - * It is not possible that a node is the child of two nodes (two different nodes - * or a multiple child of the same node). - * You can break the connection between a node and its parent; the method - * "delete" performs this operations and deletes the node from the parent's - * list of children. The node is now a root, for itself and for all - * subordinate nodes. In this context, the node is also called an orphan, - * because it has lost its parent (this is a bit misleading because the - * parent is not always the creator of a node). - * In order to simplify complex operations, you can also set the list of - * children of an element. Nodes that have been children before are unchanged; - * new nodes are added (and the linkage is set up), nodes no more occurring - * in the list are handled if they have been deleted. - * If you try to add a node that is not a root (either by an "add" or by a - * "set" operation) the operation fails. - * - * CREATION OF NODES - * - * The class interface supports creation of nodes by cloning a so-called - * exemplar. The idea is that it is sometimes useful to implement different - * element types by different classes, and to implement this by looking up - * exemplars. - * Imagine you have three element types A, B, and C, and three classes - * a, b, and c implementing the node interface (for example, by providing - * different extensions, see below). The XML parser can be configured to - * have a lookup table - * { A --> a0, B --> b0, C --> c0 } - * where a0, b0, c0 are exemplars of the classes a, b, and c, i.e. empty - * objects belonging to these classes. If the parser finds an instance of - * A, it looks up the exemplar a0 of A and clones it (actually, the method - * "create_element" performs this for elements, and "create_data" for data - * nodes). Clones belong to the same class as the original nodes, so the - * instances of the elements have the same classes as the configured - * exemplars. - * Note: This technique assumes that the interface of all exemplars is the - * same! - * - * THE EXTENSION - * - * The class type node and all its implementations have a class parameter - * 'ext which must at least fulfil the properties of the class type "extension". - * The idea is that you can add properties, for example: - * - * class my_extension = - * object - * (* minimal properties required by class type "extension": *) - * method clone = ... - * method node = ... - * method set_node n = ... - * (* here my own methods: *) - * method do_this_and_that ... - * end - * - * class my_element_impl = [ my_extension ] element_impl - * class my_data_impl = [ my_extension ] data_impl - * - * The whole XML parser is parameterized with 'ext, so your extension is - * visible everywhere (this is the reason why extensibility is solved by - * parametric polymorphism and not by inclusive polymorphism (subtyping)). - * - * - * SOME COMPLICATED TYPE EXPRESSIONS - * - * Sometimes the following type expressions turn out to be necessary: - * - * 'a node extension as 'a - * This is the type of an extension that belongs to a node that - * has an extension that is the same as we started with. - * - * 'a extension node as 'a - * This is the type of a node that has an extension that belongs to a - * node of the type we started with. - * - * - * DOCUMENTS - * ... - * - * ====================================================================== - * - * SIMPLE USAGE: ... - *) - - -open Markup_dtd - - -type node_type = - T_element of string - | T_data - - - -class type [ 'node ] extension = - object ('self) - method clone : 'self - (* "clone" should return an exact deep copy of the object. *) - method node : 'node - (* "node" returns the corresponding node of this extension. This method - * intended to return exactly what previously has been set by "set_node". - *) - method set_node : 'node -> unit - (* "set_node" is invoked once the extension is associated to a new - * node object. - *) - end -;; - -class type [ 'ext, 'node ] pxp_extension_type = -object ('self) - method clone : 'self - method node : 'self Pxp_document.node - method set_node : 'self Pxp_document.node -> unit - - method markup_node : 'node - method set_markup_node : 'node -> unit - - method set_index : 'self Pxp_yacc.index -> unit - method index : 'self Pxp_yacc.index - end -;; - -class type [ 'ext ] node = - object ('self) - constraint 'ext = 'ext node #extension - method pxp_node : (('ext, 'ext node) pxp_extension_type) Pxp_document.node - - method extension : 'ext - (* Return the extension of this node: *) - - method delete : unit - (* Delete this node from the parent's list of sub nodes. This node gets - * orphaned. - * 'delete' does nothing if this node does not have a parent. - *) - - method parent : 'ext node - (* Get the parent, or raise Not_found if this node is an orphan. *) - - method root : 'ext node - (* Get the direct or indirect parent that does not have a parent itself, - * i.e. the root of the tree. - *) - - method orphaned_clone : 'ext node - (* return an exact clone of this element and all sub nodes (deep copy) - * except string values which are shared by this node and the clone. - * The other exception is that the clone has no parent (i.e. it is now - * a root). - *) - - method orphaned_flat_clone : 'ext node - (* return a clone of this element where all subnodes are omitted. - * The type of the node, and the attributes are the same as in the - * original node. - * The clone has no parent. - *) - - method add_node : 'ext node -> unit - (* Append new sub nodes -- mainly used by the parser itself, but - * of course open for everybody. If an element is added, it must be - * an orphan (i.e. does not have a parent node); and after addition - * *this* node is the new parent. - *) - - method add_pinstr : proc_instruction -> unit - (* Add a processing instruction to the set of processing instructions of - * this node. Usually only elements contain processing instructions. - *) - - method pinstr : string -> proc_instruction list - (* Get all processing instructions with the passed name *) - - method pinstr_names : string list - (* Get a list of all names of processing instructions *) - - method sub_nodes : 'ext node list - (* Get the list of sub nodes *) - - method iter_nodes : ('ext node -> unit) -> unit - (* iterate over the sub nodes *) - - method iter_nodes_sibl : - ('ext node option -> 'ext node -> 'ext node option -> unit) -> unit - (* Here every iteration step can also access to the previous and to the - * following node if present: - *) - - method find : string -> 'ext node - (* Get the node that has an ID attribute with this value, or raise - * Not_found. - * "find" may also cause a Validation_error if something is wrong - * with the IDs. - *) - - method reset_finder : unit - (* makes that newly added nodes will also be found *) - - method set_nodes : 'ext node list -> unit - (* Set the list of sub nodes. Elements that are no longer sub nodes gets - * orphaned, and all new elements that previously were not sub nodes - * must have been orphaned. - *) - - method data : string - (* Get the data string of this node. For data nodes, this string is just - * the content. For elements, this string is the concatenation of all - * subordinate data nodes. - *) - - method node_type : node_type - (* Get the name of the element type. *) - - method attribute : string -> Markup_types.att_value - method attribute_names : string list - method attribute_type : string -> Markup_types.att_type - method attributes : (string * Markup_types.att_value) list - (* Get a specific attribute; get the names of all attributes; get the - * type of a specific attribute; get names and values of all attributes. - * Only elements have attributes. - * Note: If the DTD allows arbitrary for this element, "attribute_type" - * raises Undeclared. - *) - - method required_string_attribute : string -> string - method required_list_attribute : string -> string list - (* Return the attribute or fail if the attribute is not present: - * The first version passes the value always as string back; - * the second version always as list. - *) - - method optional_string_attribute : string -> string option - method optional_list_attribute : string -> string list - (* Return some attribute value or return None if the attribute is not - * present: - * The first version passes the value always as string back; - * the second version always as list. - *) - - method quick_set_attributes : (string * Markup_types.att_value) list -> unit - (* Sets the attributes but does not check whether they match the DTD. - *) - - method dtd : dtd - (* Get the DTD *) - - method create_element : dtd -> node_type -> (string * string) list -> 'ext node - (* create an "empty copy" of this element: - * - new DTD - * - new node type - * - new attribute list - * - empty list of nodes - *) - - method create_data : dtd -> string -> 'ext node - (* create an "empty copy" of this data node: *) - - method local_validate : unit - (* Check that this element conforms to the DTD: *) - - method keep_always_whitespace_mode : unit - (* Normally, add_node does not accept data nodes when the DTD does not - * allow data nodes or only whitespace ("ignorable whitespace"). - * Once you have invoked this method, ignorable whitespace is forced - * to be included into the document. - *) - - method write_compact_as_latin1 : Markup_types.output_stream -> unit - (* Write the contents of this node and the subtrees to the passed - * output stream; the character set ISO-8859-1 is used. The format - * is compact (the opposite of "pretty printing"). - *) - - (* ---------------------------------------- *) - (* internal methods: *) - method internal_adopt : 'ext node option -> unit - method internal_delete : 'ext node -> unit - method internal_init : dtd -> string -> (string * string) list -> unit - end -;; - -class [ 'ext ] data_impl : 'ext -> string -> [ 'ext ] node - -class [ 'ext ] element_impl : 'ext -> [ 'ext ] node - -class [ 'ext ] document : - Markup_types.collect_warnings -> - object - method init_xml_version : string -> unit - method init_xml_standalone : bool -> unit - method init_root : 'ext node -> unit - - method xml_version : string - method xml_standalone : bool - method dtd : dtd - method root : 'ext node - - method add_pinstr : proc_instruction -> unit - method pinstr : string -> proc_instruction list - method pinstr_names : string list - - method write_compact_as_latin1 : Markup_types.output_stream -> unit - (* Write the document to the passed - * output stream; the character set ISO-8859-1 is used. The format - * is compact (the opposite of "pretty printing"). - * If a DTD is present, the DTD is included into the internal subset. - *) - - end -;; - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.4 2000/08/18 20:19:16 gerd - * Updates in the emulation because of PXP changes. - * - * Revision 1.3 2000/07/16 16:35:06 gerd - * Update because PXP interface contains now the method 'write'. - * - * Revision 1.2 2000/06/14 22:19:27 gerd - * Update because of additional 'encoding' methods. - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - * ====================================================================== - * OLD LOGS: - * - * Revision 1.13 2000/05/27 19:15:08 gerd - * Removed the method init_xml_standalone. - * - * Revision 1.12 2000/05/01 20:42:34 gerd - * New method write_compact_as_latin1. - * - * Revision 1.11 2000/04/30 18:15:57 gerd - * Beautifications. - * New method keep_always_whitespace_mode. - * - * Revision 1.10 2000/03/11 22:58:15 gerd - * Updated to support Markup_codewriter. - * - * Revision 1.9 2000/01/27 21:51:56 gerd - * Added method 'attributes'. - * - * Revision 1.8 2000/01/27 21:19:07 gerd - * Added further methods. - * - * Revision 1.7 1999/11/09 22:20:14 gerd - * Removed method init_dtd from class "document". The DTD is - * implicitly passed to the document by the root element. - * - * Revision 1.6 1999/09/01 22:51:40 gerd - * Added methods to store processing instructions. - * - * Revision 1.5 1999/09/01 16:19:57 gerd - * The "document" class has now a "warner" as class argument. - * - * Revision 1.4 1999/08/19 21:59:13 gerd - * Added method "reset_finder". - * - * Revision 1.3 1999/08/19 01:08:29 gerd - * Added method "find". - * - * Revision 1.2 1999/08/15 02:19:41 gerd - * Some new explanations: That unknown elements are not rejected - * if the DTD allows them. - * - * Revision 1.1 1999/08/10 00:35:51 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_dtd.ml b/helm/DEVEL/pxp/pxp/compatibility/markup_dtd.ml deleted file mode 100644 index 7df5e29c6..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_dtd.ml +++ /dev/null @@ -1,36 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - *) - -class dtd w = - Pxp_dtd.dtd - (w : Markup_types.collect_warnings :> Pxp_types.collect_warnings) - `Enc_iso88591;; - -class dtd_element dtd name = - Pxp_dtd.dtd_element dtd name;; - -class dtd_notation name id = - Pxp_dtd.dtd_notation name id `Enc_iso88591;; - -class proc_instruction target value = - Pxp_dtd.proc_instruction target value `Enc_iso88591;; - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.3 2000/07/14 21:35:35 gerd - * Updated because of the simplification of Pxp_types.collect_warnings. - * - * Revision 1.2 2000/06/14 22:19:27 gerd - * Update because of additional 'encoding' methods. - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - *) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_dtd.mli b/helm/DEVEL/pxp/pxp/compatibility/markup_dtd.mli deleted file mode 100644 index 660b35ae8..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_dtd.mli +++ /dev/null @@ -1,108 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * Markup! The validating XML parser for Objective Caml. - * Copyright 1999 by Gerd Stolpmann. See LICENSE for details. - * - * THIS IS THE markup-0.2.10 COMPATIBLE INTERFACE TO markup_dtd.mli. - * It corresponds to revision 1.11 of markup_dtd.mli. - *) - -(**********************************************************************) -(* *) -(* Markup_dtd: *) -(* Object model of document type declarations *) -(* *) -(**********************************************************************) - -(* ====================================================================== - * OVERVIEW - * - * class dtd ............... represents the whole DTD, including element - * declarations, entity declarations, notation - * declarations, and processing instructions - * class dtd_element ....... represents an element declaration consisting - * of a content model and an attribute list - * declaration - * class dtd_notation ...... represents a notation declaration - * class proc_instruction .. represents a processing instruction - * ====================================================================== - * - *) - - -class dtd : - Markup_types.collect_warnings -> - Pxp_dtd.dtd - (* Incompatibilities: - * add_gen_entity, gen_entity - *) - -class dtd_element : dtd -> string -> Pxp_dtd.dtd_element - (* Incompatibilities: - * set_content_model, add_attribute - *) - -class dtd_notation : string -> Markup_types.ext_id -> Pxp_dtd.dtd_notation - -class proc_instruction : string -> string -> Pxp_dtd.proc_instruction - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - * ====================================================================== - * OLD LOGS: - * - * Revision 1.11 2000/05/29 21:14:57 gerd - * Changed the type 'encoding' into a polymorphic variant. - * - * Revision 1.10 2000/05/27 19:20:38 gerd - * Changed the interfaces for the standalone check: New - * methods: standalone_declaration, set_standalone_declaration, - * externally_declared, attribute_violates_standalone_declaration. - * The method set_content_model has been renamed to - * set_cm_and_extdecl; it now initializes also whether the element - * has been declared in an external entity. - * Methods add_gen_entity and gen_entity pass an additional - * boolean argument containing whether the declaration of the - * general entity happened in an external entity. - * Method add_attribute expects this argument, too, which - * states whether the declaration of the attribute happened in an - * external entity. - * - * Revision 1.9 2000/05/20 20:31:40 gerd - * Big change: Added support for various encodings of the - * internal representation. - * - * Revision 1.8 2000/05/06 23:10:26 gerd - * allow_arbitrary for elements, too. - * - * Revision 1.7 2000/05/01 20:42:52 gerd - * New method write_compact_as_latin1. - * - * Revision 1.6 2000/03/11 22:58:15 gerd - * Updated to support Markup_codewriter. - * - * Revision 1.5 2000/02/22 02:32:02 gerd - * Updated. - * - * Revision 1.4 1999/11/09 22:15:41 gerd - * Added method "arbitrary_allowed". - * - * Revision 1.3 1999/09/01 16:21:56 gerd - * "dtd" classes have now an argument that passes a "warner". - * - * Revision 1.2 1999/08/15 02:20:23 gerd - * New feature: a DTD can allow arbitrary elements. - * - * Revision 1.1 1999/08/10 00:35:51 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_reader.ml b/helm/DEVEL/pxp/pxp/compatibility/markup_reader.ml deleted file mode 100644 index a196c2219..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_reader.ml +++ /dev/null @@ -1,119 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - *) - -open Markup_types;; - -class type resolver = - object - method open_in : ext_id -> Lexing.lexbuf - method close_in : unit - method change_encoding : string -> unit - method clone : resolver - end -;; - -(* General note: close_in is simulated by close_all. Of course, this is - * wrong, but it should not matter - *) - - -class resolve_read_channel ch the_warner = - object (self) - val pxp_resolver = - new Pxp_reader.resolve_read_this_channel - ~auto_close:false - ch - val warner = the_warner - - initializer - pxp_resolver # init_warner - (warner : Markup_types.collect_warnings :> Pxp_types.collect_warnings); - pxp_resolver # init_rep_encoding `Enc_iso88591; - - method open_in xid = - pxp_resolver # open_in xid - - method close_in = - pxp_resolver # close_all (* sic! *) - - method change_encoding enc = - pxp_resolver # change_encoding enc - - method clone = - ( {< pxp_resolver = pxp_resolver # clone >} : #resolver :> resolver ) - - end -;; - - -class resolve_read_string str = - object (self) - val pxp_resolver = - new Pxp_reader.resolve_read_this_string str - val warner = new Pxp_types.drop_warnings - - initializer - pxp_resolver # init_warner warner; - pxp_resolver # init_rep_encoding `Enc_iso88591; - - method open_in xid = - pxp_resolver # open_in xid - - method close_in = - pxp_resolver # close_all (* sic! *) - - method change_encoding enc = - pxp_resolver # change_encoding enc - - method clone = - ( {< pxp_resolver = pxp_resolver # clone >} : #resolver :> resolver ) - end -;; - - -class resolve_as_file the_warner = - object (self) - val pxp_resolver = - new Pxp_reader.resolve_as_file - ~system_encoding:`Enc_iso88591 - () - val warner = the_warner - - initializer - pxp_resolver # init_warner - (warner : Markup_types.collect_warnings :> Pxp_types.collect_warnings); - pxp_resolver # init_rep_encoding `Enc_iso88591; - - method open_in xid = - pxp_resolver # open_in xid - - method close_in = - pxp_resolver # close_all (* sic! *) - - method change_encoding enc = - pxp_resolver # change_encoding enc - - method clone = - ( {< pxp_resolver = pxp_resolver # clone >} : #resolver :> resolver ) - end -;; - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.3 2000/07/14 21:35:35 gerd - * Updated because of the simplification of Pxp_types.collect_warnings. - * - * Revision 1.2 2000/07/08 17:40:50 gerd - * Updated the simulation. - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - *) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_reader.mli b/helm/DEVEL/pxp/pxp/compatibility/markup_reader.mli deleted file mode 100644 index 8e5e2c8fc..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_reader.mli +++ /dev/null @@ -1,141 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * Markup! The validating XML parser for Objective Caml. - * Copyright by Gerd Stolpmann. See LICENSE for details. - * - * THIS IS THE markup-0.2.10 COMPATIBLE INTERFACE TO markup_reader.mli. - * It corresponds to revision 1.3 of markup_reader.mli. - *) - -open Markup_types;; - - -(* The class type resolver is the official type of all "resolvers". - * Resolvers get file names (or better, external identifiers) and - * return lexbufs, scanning the file for tokens. Resolvers may be - * cloned, and clones can interpret relative file names relative to - * their creator. - *) - -class type resolver = - object - (* A resolver can open a character source, and returns this source as - * Lexing.lexbuf. - * The resolver should recode the source into ISO-8859-1. By default, - * a resolver should assume UTF-8 or UTF-16 encoding. Before - * 'change_encoding' is invoked, the resolver should only return - * lexbufs with one character. After 'change_encoding' has been invoked, - * there is no character limit anymore. - * 'change_encoding' can only be invoked once. This method is usually - * called after the prolog of the entity has been read. - * If this method is not called, it is up to the resolver to find out - * if UTF-8 or UTF-16 is used. It is recommended to invoke this method - * with an empty string to indicate this situation. - *) - method open_in : ext_id -> Lexing.lexbuf - method close_in : unit - method change_encoding : string -> unit - - - (* Every resolver can be cloned. The clone does not inherit the connection - * with the external object, i.e. it is closed. - *) - method clone : resolver - - end -;; - - -(* The following class is the current main implementation of resolvers. - * It fetches strings from an arbitrary source (by calling init_in, and - * then repeatedly next_string), recodes them to ISO-8859-1, and creates - * lexbufs for them. - * It is not complete, as the source is missing. - * - * Note that 'resolve_general' may change in future revisions; it is ugly. - *) - -(* -- This API simulation does not provide 'resolve_general' any longer - -class virtual resolve_general : - collect_warnings -> - object - val mutable encoding : string - val mutable encoding_requested : bool - val warner : collect_warnings - - method clone : resolver - - method private warn : int -> unit - method private autodetect : string -> unit - - method private virtual next_string : string -> int -> int -> int - method private virtual init_in : ext_id -> unit - method virtual close_in : unit - - method open_in : ext_id -> Lexing.lexbuf - - method change_encoding : string -> unit - end -*) - - -(* The next classes are resolvers for concrete input sources. *) - -class resolve_read_channel : - in_channel -> collect_warnings -> resolver;; - - (* Reads from the passed channel (it may be even a pipe). Note that this - * resolver cannot handle file inclusions, as it is pre-bound to a - * specific channel and is not able to interpret file names. - * That means, if there is a entity reference (something like &name; or - * %name;) to parse, and the definition points to another file, the - * resolver will fail. - *) - - -class resolve_read_string : - string -> resolver;; - - (* Reads from the passed string. As 'resolver_read_channel', this - * resolver cannot handle file inclusions. - *) - - -class resolve_as_file : - collect_warnings -> resolver;; - - (* Reads from the local file system. Every file name is interpreted as - * file name of the local file system, and the referred file is read. - * This resolver can handle file inclusions as long as they do not - * exceed the scope of the local file system (i.e. no URLs). - *) - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.2 2000/07/08 17:40:50 gerd - * Updated the simulation. - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - * ====================================================================== - * OLD LOGS: - * - * Revision 1.3 2000/05/29 21:14:57 gerd - * Changed the type 'encoding' into a polymorphic variant. - * - * Revision 1.2 2000/05/20 20:31:40 gerd - * Big change: Added support for various encodings of the - * internal representation. - * - * Revision 1.1 2000/03/13 23:41:54 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_types.ml b/helm/DEVEL/pxp/pxp/compatibility/markup_types.ml deleted file mode 100644 index a0c0c271b..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_types.ml +++ /dev/null @@ -1,103 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - *) - - -type ext_id = Pxp_types.ext_id = - System of string - | Public of (string * string) - | Anonymous -type dtd_id = Pxp_types.dtd_id= - External of ext_id - | Derived of ext_id - | Internal -type content_model_type = Pxp_types.content_model_type = - Unspecified - | Empty - | Any - | Mixed of mixed_spec list - | Regexp of regexp_spec -and mixed_spec = Pxp_types.mixed_spec = - MPCDATA - | MChild of string -and regexp_spec = Pxp_types.regexp_spec = - Optional of regexp_spec - | Repeated of regexp_spec - | Repeated1 of regexp_spec - | Alt of regexp_spec list - | Seq of regexp_spec list - | Child of string -type att_type = Pxp_types.att_type = - A_cdata - | A_id - | A_idref - | A_idrefs - | A_entity - | A_entities - | A_nmtoken - | A_nmtokens - | A_notation of string list - | A_enum of string list -type att_default = Pxp_types.att_default = - D_required - | D_implied - | D_default of string - | D_fixed of string -type att_value = Pxp_types.att_value = - Value of string - | Valuelist of string list - | Implied_value - -class collect_warnings = -object - val mutable w = Buffer.create 100 - method print_warnings = - Buffer.contents w - method reset = - Buffer.clear w - method warn s = - Buffer.add_string w ("WARNING: " ^ s ^ "\n") -end - -exception Illegal_character of int -exception Validation_error = Pxp_types.Validation_error -exception WF_error = Pxp_types.WF_error -exception Character_not_supported = Pxp_types.Character_not_supported -exception Bad_character_stream = Netconversion.Malformed_code -exception At = Pxp_types.At -exception Undeclared = Pxp_types.Undeclared - -let string_of_exn = Pxp_types.string_of_exn - -type output_stream = Pxp_types.output_stream = - Out_buffer of Buffer.t - | Out_channel of out_channel - | Out_function of (string -> int -> int -> unit) - -let write = Pxp_types.write - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.5 2000/08/18 20:19:16 gerd - * Updates in the emulation because of PXP changes. - * - * Revision 1.4 2000/07/16 18:30:15 gerd - * Updated because PXP does no longer have the exception - * Illegal_character. - * - * Revision 1.3 2000/07/14 21:35:35 gerd - * Updated because of the simplification of Pxp_types.collect_warnings. - * - * Revision 1.2 2000/07/08 17:40:50 gerd - * Updated the simulation. - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - *) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_types.mli b/helm/DEVEL/pxp/pxp/compatibility/markup_types.mli deleted file mode 100644 index b33bb30b2..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_types.mli +++ /dev/null @@ -1,125 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * Markup! The validating XML parser for Objective Caml. - * Copyright 1999 by Gerd Stolpmann. See LICENSE for details. - * - * THIS IS THE markup-0.2.10 COMPATIBLE INTERFACE TO markup_types.mli. - * It corresponds to revision 1.7 of markup_types.mli. - *) - - -type ext_id = Pxp_types.ext_id = - System of string - | Public of (string * string) - | Anonymous -type dtd_id = Pxp_types.dtd_id = - External of ext_id - | Derived of ext_id - | Internal -type content_model_type = Pxp_types.content_model_type = - Unspecified - | Empty - | Any - | Mixed of mixed_spec list - | Regexp of regexp_spec -and mixed_spec = Pxp_types.mixed_spec = - MPCDATA - | MChild of string -and regexp_spec = Pxp_types.regexp_spec = - Optional of regexp_spec - | Repeated of regexp_spec - | Repeated1 of regexp_spec - | Alt of regexp_spec list - | Seq of regexp_spec list - | Child of string -type att_type = Pxp_types.att_type = - A_cdata - | A_id - | A_idref - | A_idrefs - | A_entity - | A_entities - | A_nmtoken - | A_nmtokens - | A_notation of string list - | A_enum of string list -type att_default = Pxp_types.att_default = - D_required - | D_implied - | D_default of string - | D_fixed of string -type att_value = Pxp_types.att_value = - Value of string - | Valuelist of string list - | Implied_value - -class collect_warnings : - object - method warn : string -> unit - method print_warnings : string - method reset : unit - end -;; - - -exception Illegal_character of int -exception Validation_error of string -exception WF_error of string -exception Character_not_supported -exception Bad_character_stream -exception At of (string * exn) -exception Undeclared - -val string_of_exn : exn -> string - (* Converts a Markup exception into a readable string *) - - -type output_stream = Pxp_types.output_stream = - Out_buffer of Buffer.t - | Out_channel of out_channel - | Out_function of (string -> int -> int -> unit) - -val write : output_stream -> string -> int -> int -> unit - (* write os s pos len: Writes the string to the buffer/channel/stream *) - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.2 2000/07/08 17:40:50 gerd - * Updated the simulation. - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - * ====================================================================== - * OLD LOGS: - * - * Revision 1.7 2000/05/29 21:14:57 gerd - * Changed the type 'encoding' into a polymorphic variant. - * - * Revision 1.6 2000/05/20 20:31:40 gerd - * Big change: Added support for various encodings of the - * internal representation. - * - * Revision 1.5 2000/05/01 20:43:25 gerd - * New type output_stream; new function 'write'. - * - * Revision 1.4 1999/09/01 16:25:35 gerd - * Dropped Illegal_token and Content_not_allowed_here. WF_error can - * be used instead. - * - * Revision 1.3 1999/08/15 02:22:40 gerd - * Added exception Undeclared. - * - * Revision 1.2 1999/08/14 22:15:17 gerd - * New class "collect_warnings". - * - * Revision 1.1 1999/08/10 00:35:52 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_yacc.ml b/helm/DEVEL/pxp/pxp/compatibility/markup_yacc.ml deleted file mode 100644 index 26c40de18..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_yacc.ml +++ /dev/null @@ -1,245 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - *) - -open Markup_types -open Markup_dtd -open Markup_document - -type config = - { warner : collect_warnings; - errors_with_line_numbers : bool; - processing_instructions_inline : bool; - virtual_root : bool; - debugging_mode : bool; - } - - -type source = - Entity of ((dtd -> Pxp_entity.entity) * Markup_reader.resolver) - | Channel of in_channel - | File of string - | Latin1 of string - | ExtID of (ext_id * Markup_reader.resolver) - -type 'ext domspec = - { map : (node_type, 'ext node) Hashtbl.t; - default_element : 'ext node; - } - - -class default_ext = - object(self) - val mutable node = (None : ('a extension node as 'a) option) - method clone = {< >} - method node = - match node with - None -> - assert false - | Some n -> n - method set_node n = - node <- Some n - end -;; - - -let default_extension = new default_ext;; - -let default_config = - { warner = new collect_warnings; - errors_with_line_numbers = true; - processing_instructions_inline = false; - virtual_root = false; - debugging_mode = false; - } - - -let default_dom = - let d = Hashtbl.create 2 in - Hashtbl.add d T_data (new data_impl default_extension ""); - { map = d; - default_element = new element_impl default_extension - } -;; - - -let pxp_config cfg = - { Pxp_yacc.default_config with - Pxp_yacc.warner = (cfg.warner :> Pxp_types.collect_warnings); - Pxp_yacc.errors_with_line_numbers = cfg.errors_with_line_numbers; - Pxp_yacc.enable_pinstr_nodes = cfg.processing_instructions_inline; - Pxp_yacc.enable_super_root_node = cfg.virtual_root; - Pxp_yacc.encoding = `Enc_iso88591; - Pxp_yacc.recognize_standalone_declaration = false; - Pxp_yacc.debugging_mode = cfg.debugging_mode; - } -;; - - -class pxp_resolver r = - object (self) - val markup_resolver = r - - method init_rep_encoding enc = - assert (enc = `Enc_iso88591 ) - - method init_warner w = - () - - method rep_encoding = `Enc_iso88591 - - method open_in xid = - markup_resolver # open_in xid - - method close_in = - markup_resolver # close_in - - method close_all = - markup_resolver # close_in - - method change_encoding enc = - markup_resolver # change_encoding enc - - method clone = - ( {< markup_resolver = markup_resolver # clone >} - : #Pxp_reader.resolver :> Pxp_reader.resolver ) - end -;; - - -let pxp_source src = - match src with - Entity (mkent, res) -> Pxp_yacc.Entity(mkent, new pxp_resolver res) - | ExtID (id, res) -> Pxp_yacc.ExtID(id, new pxp_resolver res) - | Channel ch -> Pxp_yacc.from_channel - ~system_encoding:`Enc_iso88591 ch - | File f -> Pxp_yacc.from_file - ~system_encoding:`Enc_iso88591 f - | Latin1 s -> Pxp_yacc.from_string ~fixenc:`Enc_iso88591 s -;; - - -let pxp_dom dom = - let dex = - try Hashtbl.find dom.map T_data - with Not_found -> assert false - in - let eex = dom.default_element in - let m = Hashtbl.create 100 in - Hashtbl.iter - (fun nt ex -> - match nt with - T_element name when name <> "-vr" && name <> "-pi" -> - let pxp_ex = ex # pxp_node in - Hashtbl.add m name pxp_ex - | _ -> () - ) - dom.map; - let srex = - try - Some ((Hashtbl.find dom.map (T_element "-vr")) # pxp_node) - with - Not_found -> None - in - let piex = - try - Some ((Hashtbl.find dom.map (T_element "-pi")) # pxp_node) - with - Not_found -> None - in - Pxp_document.make_spec_from_mapping - ?super_root_exemplar:srex - ?default_pinstr_exemplar:piex - ~data_exemplar:(dex # pxp_node) - ~default_element_exemplar:(eex # pxp_node) - ~element_mapping:m - () -;; - - -let markup_document w index doc = - let mdoc = new document w in - mdoc # init_xml_version (doc # xml_version); - mdoc # init_xml_standalone (doc # xml_standalone); - let r = doc # root # extension in - r # set_index index; - mdoc # init_root (r # markup_node); - List.iter - (fun piname -> - let l = doc # pinstr piname in - List.iter - (fun pi -> mdoc # add_pinstr pi) - l) - (doc # pinstr_names); - mdoc -;; - - - -let parse_dtd_entity cfg src = - Pxp_yacc.parse_dtd_entity - (pxp_config cfg) - (pxp_source src) -;; - - -let parse_document_entity cfg src dom = - let index = (new Pxp_yacc.hash_index :> 'ext Pxp_yacc.index) in - markup_document - cfg.warner - index - (Pxp_yacc.parse_document_entity - ~id_index:index - (pxp_config cfg) - (pxp_source src) - (pxp_dom dom)) -;; - - -let parse_content_entity cfg src dtd dom = - let index = (new Pxp_yacc.hash_index :> 'ext Pxp_yacc.index) in - let n = - (Pxp_yacc.parse_content_entity - ~id_index:index - (pxp_config cfg) - (pxp_source src) - dtd - (pxp_dom dom)) # extension in - n # set_index index; - n # markup_node -;; - - -let parse_wf_entity cfg src dom = - let index = (new Pxp_yacc.hash_index :> 'ext Pxp_yacc.index) in - (* Restriction: index is not filled! *) - markup_document - cfg.warner - index - (Pxp_yacc.parse_wfdocument_entity - (pxp_config cfg) - (pxp_source src) - (pxp_dom dom)) -;; - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.4 2000/08/18 20:19:16 gerd - * Updates in the emulation because of PXP changes. - * - * Revision 1.3 2000/07/14 21:35:35 gerd - * Updated because of the simplification of Pxp_types.collect_warnings. - * - * Revision 1.2 2000/07/08 17:40:50 gerd - * Updated the simulation. - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - *) diff --git a/helm/DEVEL/pxp/pxp/compatibility/markup_yacc.mli b/helm/DEVEL/pxp/pxp/compatibility/markup_yacc.mli deleted file mode 100644 index daccad4c7..000000000 --- a/helm/DEVEL/pxp/pxp/compatibility/markup_yacc.mli +++ /dev/null @@ -1,233 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * Markup! The validating XML parser for Objective Caml. - * Copyright 1999 by Gerd Stolpmann. See LICENSE for details. - * - * THIS IS THE markup-0.2.10 COMPATIBLE INTERFACE TO markup_yacc.mli. - * It corresponds to revision 1.4 of markup_yacc.mli. - *) - - -(*$ markup-yacc.mli *) - -open Markup_types -open Markup_dtd -open Markup_document - -type config = - { warner : collect_warnings; - (* An object that collects warnings. *) - - errors_with_line_numbers : bool; - (* Whether error messages contain line numbers or not. The parser - * is 10 to 20 per cent faster if line numbers are turned off; - * you get only character positions in this case. - *) - - processing_instructions_inline : bool; - (* true: turns a special mode for processing instructions on. Normally, - * you cannot determine the exact location of a PI; you only know - * in which element the PI occurs. The "inline" mode makes it possible - * to find the exact location out: Every PI is artificially wrapped - * by a special element with name "-pi". For example, if the XML text - * is , the parser normally produces only an element - * object for "a", and puts the PIs "x" and "y" into it (without - * order). In inline mode, the object "a" will contain two objects - * with name "-pi", and the first object will contain "x", and the - * second "y". - * Notes: - * (1) The name "-pi" is reserved. You cannot use it for your own - * tags because tag names must not begin with '-'. - * (2) You need not to add a declaration for "-pi" to the DTD. These - * elements are handled separately. - * (3) Of course, the "-pi" objects are created from exemplars of - * your DOM map. - *) - - virtual_root : bool; - (* true: the topmost element of the XML tree is not the root element, - * but the so-called virtual root. The root element is a son of the - * virtual root. The virtual root is an ordinary element with name - * "-vr". - * The following behaviour changes, too: - * - PIs occurring outside the root element and outside the DTD are - * added to the virtual root instead of the document object - * - If processing_instructions_inline is also turned on, these PIs - * are added inline to the virtual root - * Notes: - * (1) The name "-vr" is reserved. You cannot use it for your own - * tags because tag names must not begin with '-'. - * (2) You need not to add a declaration for "-vr" to the DTD. These - * elements are handled separately. - * (3) Of course, the "-vr" objects are created from exemplars of - * your DOM map. - *) - - (* The following options are not implemented, or only for internal - * use. - *) - - debugging_mode : bool; - } - - -type source = - Entity of ((dtd -> Pxp_entity.entity) * Markup_reader.resolver) - | Channel of in_channel - | File of string - | Latin1 of string - | ExtID of (ext_id * Markup_reader.resolver) - -(* Note on sources: - * - * The sources do not have all the same capabilities. Here the differences: - * - * - File: A File source reads from a file by name. This has the advantage - * that references to external entites can be resolved. - The problem - * with SYSTEM references is that they usually contain relative file - * names; more exactly, a file name relative to the document containing it. - * It is only possible to convert such names to absolute file names if the - * name of the document containing such references is known; and File - * denotes this name. - * - * - Channel, Latin1: These sources read from documents given as channels or - * (Latin 1-encoded) strings. There is no file name, and because of this - * the documents must not contain references to external files (even - * if the file names are given as absolute names). - * - * - ExtID(x,r): The identifier x (either the SYSTEM or the PUBLIC name) of the - * entity to read from is passed to the resolver r as-is. - * The intention of this option is to allow customized - * resolvers to interpret external identifiers without any restriction. - * For example, you can assign the PUBLIC identifiers a meaning (they - * currently do not have any), or you can extend the "namespace" of - * identifiers. - * ExtID is the interface of choice for own extensions to resolvers. - * - * - Entity(m,r): You can implementy every behaviour by using a customized - * entity class. Once the DTD object d is known that will be used during - * parsing, the entity e = m d is determined and used together with the - * resolver r. - * This is only for hackers. - *) - - -type 'ext domspec = - { map : (node_type, 'ext node) Hashtbl.t; - default_element : 'ext node; - } - (* Specifies which node to use as exemplar for which node type. See the - * manual for explanations. - *) - -val default_config : config - (* - The resolver is able to read from files by name - * - Warnings are thrown away - * - Error message will contain line numbers - * - The internal encoding is ISO-8859-1 - * - standalone declaration is checked - *) - -val default_extension : ('a node extension) as 'a - (* A "null" extension; an extension that does not extend the funtionality *) - -val default_dom : ('a node extension as 'a) domspec - (* Specifies that you do not want to use extensions. *) - -val parse_dtd_entity : config -> source -> dtd - (* Parse an entity containing a DTD, and return this DTD. *) - -val parse_document_entity : config -> source -> 'ext domspec -> 'ext document - (* Parse a closed document, i.e. a document beginning with , - * and validate the contents of the document against the DTD contained - * and/or referenced in the document. - *) - -val parse_content_entity : config -> - source -> - dtd -> - 'ext domspec -> - 'ext node - (* Parse a file representing a well-formed fragment of a document. The - * fragment must be a single element (i.e. something like ...; - * not a sequence like ......). The element is validated - * against the passed DTD, but it is not checked whether the element is - * the root element specified in the DTD. - * Note that you can create DTDs that specify not to validate at all - * (invoke method allow_arbitrary on the DTD). - *) - -val parse_wf_entity : config -> source -> 'ext domspec -> 'ext document - (* Parse a closed document (see parse_document_entity), but do not - * validate it. Only checks on well-formedness are performed. - *) - -(*$-*) - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:30 lpadovan - * Initial revision - * - * Revision 1.1 2000/05/29 23:43:51 gerd - * Initial compatibility revision. - * - * ====================================================================== - * OLD LOGS: - * - * Revision 1.4 2000/05/29 21:14:57 gerd - * Changed the type 'encoding' into a polymorphic variant. - * - * Revision 1.3 2000/05/27 19:24:01 gerd - * New option: recognize_standalone_declaration. - * - * Revision 1.2 2000/05/20 20:31:40 gerd - * Big change: Added support for various encodings of the - * internal representation. - * - * Revision 1.1 2000/05/06 23:21:49 gerd - * Initial revision. - * - * Revision 1.9 2000/04/30 18:23:38 gerd - * New config options 'processing_instructions_inline' and - * 'virtual_root'. - * - * Revision 1.8 2000/03/13 23:46:46 gerd - * Change: The 'resolver' component of the 'config' type has - * disappeared. Instead, there is a new resolver component in the Entity - * and ExtID values of 'source'. I hope that this makes clearer that the - * resolver has only an effect if used together with Entity and ExtID - * sources. - * Change: The Entity value can now return the entity dependent - * on the DTD that is going to be used. - * - * Revision 1.7 2000/02/22 02:32:02 gerd - * Updated. - * - * Revision 1.6 2000/02/22 01:52:45 gerd - * Added documentation. - * - * Revision 1.5 2000/01/20 20:54:43 gerd - * New config.errors_with_line_numbers. - * - * Revision 1.4 1999/09/01 23:09:10 gerd - * New function parse_wf_entity that simulates a well-formedness - * parser. - * - * Revision 1.3 1999/09/01 16:26:36 gerd - * Added an empty line. This is *really* a big change. - * - * Revision 1.2 1999/08/14 22:20:27 gerd - * The "config" slot has now a component "warner"which is - * an object with a "warn" method. This is used to warn about characters - * that cannot be represented in the Latin 1 alphabet. - * Furthermore, there is a new component "debugging_mode". - * - * Revision 1.1 1999/08/10 00:35:52 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/doc/ABOUT-FINDLIB b/helm/DEVEL/pxp/pxp/doc/ABOUT-FINDLIB deleted file mode 100644 index d942e2786..000000000 --- a/helm/DEVEL/pxp/pxp/doc/ABOUT-FINDLIB +++ /dev/null @@ -1,52 +0,0 @@ -****************************************************************************** -ABOUT-FINDLIB - Package manager for O'Caml -****************************************************************************** - - -============================================================================== -Abstract -============================================================================== - -The findlib library provides a scheme to manage reusable software components -(packages), and includes tools that support this scheme. Packages are -collections of OCaml modules for which metainformation can be stored. The -packages are kept in the filesystem hierarchy, but with strict directory -structure. The library contains functions to look the directory up that stores -a package, to query metainformation about a package, and to retrieve dependency -information about multiple packages. There is also a tool that allows the user -to enter queries on the command-line. In order to simplify compilation and -linkage, there are new frontends of the various OCaml compilers that can -directly deal with packages. - -Together with the packages metainformation is stored. This includes a version -string, the archives the package consists of, and additional linker options. -Packages can also be dependent on other packages. There is a query which finds -out all predecessors of a list of packages and sorts them topologically. The -new compiler frontends do this implicitly. - -Metainformation can be conditional, i.e. depend on a set of predicates. This is -mainly used to be able to react on certain properties of the environment, such -as if the bytecode or the native compiler is invoked, if the application is -multi-threaded, and a few more. If the new compiler frontends are used, most -predicates are found out automatically. - -There is special support for scripts. A new directive, "#require", loads -packages into scripts. Of course, this works only with newly created toploops -which include the findlib library. - -============================================================================== -Where to get findlib -============================================================================== - -The manual of findlib is available online [1]. You can download findlib here -[2]. - - --------------------------- - -[1] see http://www.ocaml-programming.de/packages/documentation/findlib/ - -[2] see http://www.ocaml-programming.de/packages/findlib-0.3.1.tar.gz - - - diff --git a/helm/DEVEL/pxp/pxp/doc/ABOUT-FINDLIB.xml b/helm/DEVEL/pxp/pxp/doc/ABOUT-FINDLIB.xml deleted file mode 100644 index d1dc5b04e..000000000 --- a/helm/DEVEL/pxp/pxp/doc/ABOUT-FINDLIB.xml +++ /dev/null @@ -1,61 +0,0 @@ - - -%common; - -findlib"> -Findlib"> - -]> - - - - Abstract -

-The &f; library provides a scheme to manage reusable software -components (packages), and includes tools that support this -scheme. Packages are collections of OCaml modules for which -metainformation can be stored. The packages are kept in the filesystem -hierarchy, but with strict directory structure. The library contains -functions to look the directory up that stores a package, to query -metainformation about a package, and to retrieve dependency -information about multiple packages. There is also a tool that allows -the user to enter queries on the command-line. In order to simplify -compilation and linkage, there are new frontends of the various OCaml -compilers that can directly deal with packages. -

- -

-Together with the packages metainformation is stored. This includes a -version string, the archives the package consists of, and additional -linker options. Packages can also be dependent on other -packages. There is a query which finds out all predecessors of a list -of packages and sorts them topologically. The new compiler frontends -do this implicitly. -

- -

-Metainformation can be conditional, i.e. depend on a set of -predicates. This is mainly used to be able to react on certain -properties of the environment, such as if the bytecode or the native -compiler is invoked, if the application is multi-threaded, and a few -more. If the new compiler frontends are used, most predicates are -found out automatically. -

- -

-There is special support for scripts. A new directive, "#require", -loads packages into scripts. Of course, this works only with newly -created toploops which include the &f; library. -

- -
- - Where to get findlib -

-The manual of &f; is available online. -You can download &f; here. -

-
-
diff --git a/helm/DEVEL/pxp/pxp/doc/EXTENSIONS b/helm/DEVEL/pxp/pxp/doc/EXTENSIONS deleted file mode 100644 index a95683910..000000000 --- a/helm/DEVEL/pxp/pxp/doc/EXTENSIONS +++ /dev/null @@ -1,50 +0,0 @@ -****************************************************************************** -Extensions of the XML specification -****************************************************************************** - - -============================================================================== -This document -============================================================================== - -This parser has some options extending the XML specification. Here, the options -are explained. - -============================================================================== -Optional declarations instead of mandatory declarations -============================================================================== - -The XML spec demands that elements, notations, and attributes must be declared. -However, there are sometimes situations where a different rule would be better: -If there is a declaration, the actual instance of the element type, notation -reference or attribute must match the pattern of the declaration; but if the -declaration is missing, a reasonable default declaration should be assumed. - -I have an example that seems to be typical: The inclusion of HTML into a meta -language. Imagine you have defined some type of "generator" or other tool -working with HTML fragments, and your document contains two types of elements: -The generating elements (with a name like "gen:xxx"), and the object elements -which are HTML. As HTML is still evolving, you do not want to declare the HTML -elements; the HTML fragments should be treated as well-formed XML fragments. In -contrast to this, the elements of the generator should be declared and -validated because you can more easily detect errors. - -The following two processing instructions can be included into the DTD: - -- - - - References to unknown element types and notations no longer cause an error. - The element may contain everything, but it must be still well-formed. It may - have arbitrary attributes, and every attribute is treated as an #IMPLIED - CDATA attribute. - -- - - - References to unknown attributes inside one of the enumerated elements no - longer cause an error. Such an attribute is treated as an #IMPLIED CDATA - attribute. - If there are several "optional-attribute-declarations" PIs, they are all - interpreted (implicitly merged). - diff --git a/helm/DEVEL/pxp/pxp/doc/EXTENSIONS.xml b/helm/DEVEL/pxp/pxp/doc/EXTENSIONS.xml deleted file mode 100644 index e64d06152..000000000 --- a/helm/DEVEL/pxp/pxp/doc/EXTENSIONS.xml +++ /dev/null @@ -1,62 +0,0 @@ - - -%common; - - -up'> - - -%config; - -]> - - - - - This document -

This parser has some options extending the XML specification. Here, the -options are explained. -

-
- - - Optional declarations instead of mandatory declarations - -

The XML spec demands that elements, notations, and attributes must be -declared. However, there are sometimes situations where a different rule would -be better: If there is a declaration, the actual instance of the -element type, notation reference or attribute must match the pattern of the -declaration; but if the declaration is missing, a reasonable default declaration -should be assumed.

- -

I have an example that seems to be typical: The inclusion of HTML into a -meta language. Imagine you have defined some type of "generator" or other tool -working with HTML fragments, and your document contains two types of elements: -The generating elements (with a name like "gen:xxx"), and the object elements -which are HTML. As HTML is still evolving, you do not want to declare the HTML -elements; the HTML fragments should be treated as well-formed XML fragments. In -contrast to this, the elements of the generator should be declared and -validated because you can more easily detect errors.

- -

The following two processing instructions can be included into the DTD:

-
    -
  • ]]> - References to unknown element types and notations no longer cause an - error. The element may contain everything, but it must be still - well-formed. It may have arbitrary attributes, and every attribute is - treated as an #IMPLIED CDATA attribute.

    -
  • -
  • ]]> - References to unknown attributes inside one of the enumerated elements - no longer cause an error. Such an attribute is treated as an #IMPLIED - CDATA attribute. -

    - -

    If there are several "optional-attribute-declarations" PIs, they are all -interpreted (implicitly merged).

    -
  • -
-
-
diff --git a/helm/DEVEL/pxp/pxp/doc/INSTALL b/helm/DEVEL/pxp/pxp/doc/INSTALL deleted file mode 100644 index 9a49a2217..000000000 --- a/helm/DEVEL/pxp/pxp/doc/INSTALL +++ /dev/null @@ -1,154 +0,0 @@ -****************************************************************************** -INSTALL - PXP, the XML parser for O'Caml -****************************************************************************** - - -============================================================================== -The "pxp" package -============================================================================== - ------------------------------------------------------------------------------- -Prerequisites ------------------------------------------------------------------------------- - -PXP requires that the netstring package [1] is already installed. PXP works -only with O'Caml 3.00 (the support for 2.04 has been dropped). The installation -procedure defined in the Makefile requires findlib [2] to work [3]. - ------------------------------------------------------------------------------- -Configuration ------------------------------------------------------------------------------- - -It is not necessary to configure PXP; but you can switch off the UTF-8 support -by setting the variable - -UTF8_SUPPORT = no - -in Makefile.conf. In this case, the UTF-8 modules are not even compiled. - By -default, the UTF-8 support is enabled. - -Note: Compiling the UTF-8 modules lasts 10 minutes on my 400 Mhz Pentium II; if -this is too long, you can set UTF8_SUPPORT to "no". - ------------------------------------------------------------------------------- -Compilation ------------------------------------------------------------------------------- - -The Makefile defines the following goals: - -- make all - compiles with the bytecode compiler and creates the files pxp_types.cma, - pxp_lex_iso88591.cma, pxp_lex_utf8.cma (*), pxp_engine.cma, and pxp_utf8.cmo - (*). The (*) files are not built if the UTF-8 support is switched off. - -- make opt - compiles with the native compiler and creates the files pxp_types.cmxa, - pxp_lex_iso88591.cmxa, pxp_lex_utf8.cmxa (*), pxp_engine.cmxa, and - pxp_utf8.cmx (*). The (*) files are not built if the UTF-8 support is - switched off. - ------------------------------------------------------------------------------- -Installation ------------------------------------------------------------------------------- - -The Makefile defines the following goals: - -- make install - installs the bytecode archives, the interface definitions, and if present, - the native archives in the default location of findlib as package "pxp" - -- make uninstall - removes the package "pxp" - -- make markup-install - installs the Markup compatibility API as package "markup" - -- make markup-uninstall - removes the package "markup" - ------------------------------------------------------------------------------- -Usage with the help of "findlib" ------------------------------------------------------------------------------- - -You can refer to the parser as the findlib package "pxp": - -ocamlfind ocamlc -package pxp ... - -By default, the UTF-8 support modules will be linked in. If you do not need -them, you may define the predicate "pxp_without_utf8", which causes that the -UTF-8 relevant parts are not linked with your program; the difference in size -is about 1 MB: - -ocamlfind ocamlc -package pxp -predicates pxp_without_utf8 ... - -Note that you can also reduce the size of the resulting executable by -specifying Netstring-related predicates (e.g. netstring_only_iso); see the -documentation of Netstring. - ------------------------------------------------------------------------------- -Linking with the archives directly ------------------------------------------------------------------------------- - -If you need UTF-8 support, you must link your program as follows: - -ocamlc ... pxp_types.cma pxp_lex_iso88591.cma pxp_lex_utf8.cma - pxp_engine.cma pxp_utf8.cmo ... - -If you do not need UTF-8, the following suffices: - -ocamlc ... pxp_types.cma pxp_lex_iso88591.cma pxp_engine.cma ... - - - -============================================================================== -The examples -============================================================================== - -In the "examples" directory you find several applications of PXP. They require -that PXP has been installed using findlib. See the Makefiles in the directories -for descriptions of "make" goals. - -============================================================================== -Trouble shooting -============================================================================== - ------------------------------------------------------------------------------- -Solaris ------------------------------------------------------------------------------- - -The "make" utility of Solaris does not work properly enough; there is a bug in -it that prevents the so-called suffix rules from being recognized. There are -two solutions: - -- Install GNU make and use it instead of Solaris make. This is the recommended - way to solve the problem, as GNU make can process almost every Makefile from - open source projects, and you will never have problems with building - software again. - -- Add the following lines to Makefile.code: - - %.cmx: %.ml - $(OCAMLOPT) -c $< - - %.cmo: %.ml - $(OCAMLC) -c $< - - %.cmi: %.mli - $(OCAMLC) -c $< - - %.ml: %.mll - ocamllex $< - - - - --------------------------- - -[1] see http://www.ocaml-programming.de/packages/documentation/netstring - -[2] see http://www.ocaml-programming.de/packages/documentation/findlib/ - -[3] Findlib is a package manager, see the file ABOUT-FINDLIB. - - - diff --git a/helm/DEVEL/pxp/pxp/doc/INSTALL.xml b/helm/DEVEL/pxp/pxp/doc/INSTALL.xml deleted file mode 100644 index ac7832dbb..000000000 --- a/helm/DEVEL/pxp/pxp/doc/INSTALL.xml +++ /dev/null @@ -1,171 +0,0 @@ - - -%common; - -PXP"> - -]> - - - The "pxp" package - Prerequisites -

-&m; requires that the netstring package - is already installed. &m; works -only with O'Caml 3.00 (the support for 2.04 has been dropped). -The installation -procedure defined in the Makefile requires findlib to workFindlib is a -package manager, see the file ABOUT-FINDLIB.. -

-
- - Configuration -

-It is not necessary to configure PXP; but you can switch off the UTF-8 -support by setting the variable - - -UTF8_SUPPORT = no - - -in Makefile.conf. In this case, the UTF-8 modules are not even compiled. -- By default, the UTF-8 support is enabled. -

- -

-Note: Compiling the UTF-8 modules lasts 10 minutes on my 400 Mhz Pentium II; -if this is too long, you can set UTF8_SUPPORT to "no".

-
- - Compilation -

-The Makefile defines the following goals: -

-
    -
  • -

    make all

    -

    compiles with the bytecode compiler and creates the files -pxp_types.cma, pxp_lex_iso88591.cma, pxp_lex_utf8.cma (*), pxp_engine.cma, -and pxp_utf8.cmo (*). The (*) files are not built if the UTF-8 support -is switched off.

    -
  • -
  • -

    make opt

    -

    compiles with the native compiler and creates the files -pxp_types.cmxa, pxp_lex_iso88591.cmxa, pxp_lex_utf8.cmxa (*), pxp_engine.cmxa, -and pxp_utf8.cmx (*). The (*) files are not built if the UTF-8 support -is switched off.

    -
  • -
-
- - Installation -

-The Makefile defines the following goals:

-
    -
  • -

    make install

    -

    installs the bytecode archives, the interface definitions, and if -present, the native archives in the default location of findlib as -package "pxp" -

    -
  • -
  • -

    make uninstall

    -

    removes the package "pxp"

    -
  • -
  • -

    make markup-install

    -

    installs the Markup compatibility API as package "markup"

    -
  • -
  • -

    make markup-uninstall

    -

    removes the package "markup"

    -
  • -
-
- - - Usage with the help of "findlib" -

You can refer to the parser as the findlib package "pxp": - - -ocamlfind ocamlc -package pxp ... - - -By default, the UTF-8 support modules will be linked in. If you do not need -them, you may define the predicate "pxp_without_utf8", which causes that the -UTF-8 relevant parts are not linked with your program; the difference in size -is about 1 MB: - - -ocamlfind ocamlc -package pxp -predicates pxp_without_utf8 ... - - -Note that you can also reduce the size of the resulting executable by -specifying Netstring-related predicates (e.g. netstring_only_iso); see the -documentation of Netstring. -

-
- - - Linking with the archives directly -

If you need UTF-8 support, you must link your program as follows: - - -ocamlc ... pxp_types.cma pxp_lex_iso88591.cma pxp_lex_utf8.cma - pxp_engine.cma pxp_utf8.cmo ... - - -If you do not need UTF-8, the following suffices: - - -ocamlc ... pxp_types.cma pxp_lex_iso88591.cma pxp_engine.cma ... - - -

-
- -
- - The examples -

-In the "examples" directory you find several applications of &m;. They require -that &m; has been installed using findlib. See the Makefiles in the -directories for descriptions of "make" goals. -

-
- - Trouble shooting - Solaris -

-The "make" utility of Solaris does not work properly enough; there is a bug -in it that prevents the so-called suffix rules from being recognized. There -are two solutions:

-
    -
  • Install GNU make and use it instead of Solaris make. This is -the recommended way to solve the problem, as GNU make can process almost -every Makefile from open source projects, and you will never have problems -with building software again.

  • -
  • Add the following lines to Makefile.code: - -%.cmx: %.ml - $(OCAMLOPT) -c $< - -%.cmo: %.ml - $(OCAMLC) -c $< - -%.cmi: %.mli - $(OCAMLC) -c $< - -%.ml: %.mll - ocamllex $< - -

  • -
-
-
-
\ No newline at end of file diff --git a/helm/DEVEL/pxp/pxp/doc/Makefile b/helm/DEVEL/pxp/pxp/doc/Makefile deleted file mode 100644 index 0ed12741c..000000000 --- a/helm/DEVEL/pxp/pxp/doc/Makefile +++ /dev/null @@ -1,43 +0,0 @@ -.PHONY: all -all: README INSTALL ABOUT-FINDLIB SPEC PRERELEASE EXTENSIONS - -README: README.xml common.xml config.xml - readme -text README.xml >README - -INSTALL: INSTALL.xml common.xml config.xml - readme -text INSTALL.xml >INSTALL - -ABOUT-FINDLIB: ABOUT-FINDLIB.xml common.xml config.xml - readme -text ABOUT-FINDLIB.xml >ABOUT-FINDLIB - -SPEC: SPEC.xml common.xml config.xml - readme -text SPEC.xml >SPEC - -EXTENSIONS: EXTENSIONS.xml common.xml config.xml - readme -text EXTENSIONS.xml >EXTENSIONS - -PRERELEASE: PRERELEASE.xml common.xml config.xml - readme -text PRERELEASE.xml >PRERELEASE - -config.xml: - touch config.xml - -common.xml: - ln -s dist-common.xml common.xml - -.PHONY: clean -clean: - -.PHONY: CLEAN -CLEAN: clean - $(MAKE) -C manual CLEAN - -.PHONY: distclean -distclean: clean - rm -f *~ - $(MAKE) -C manual distclean - -.PHONY: symlinks -symlinks: - ln -s ../examples/readme/readme.dtd . - diff --git a/helm/DEVEL/pxp/pxp/doc/PRERELEASE b/helm/DEVEL/pxp/pxp/doc/PRERELEASE deleted file mode 100644 index bc46cd059..000000000 --- a/helm/DEVEL/pxp/pxp/doc/PRERELEASE +++ /dev/null @@ -1,103 +0,0 @@ -****************************************************************************** -README - PXP, the XML parser for O'Caml -****************************************************************************** - - -============================================================================== -Pre-release of PXP, the XML parser for O'Caml -============================================================================== - -PXP is the new, completely revised and partly rewritten validating XML parser -for O'Caml; the old name, "Markup", has been dropped. The current version of -PXP is still a bit experimental because it is not fully tested; however, it is -now stable enough to be used in experimental applications. - -PXP will retain most parts of Markup's API; the name PXP emphasizes the -strengths of the API: it is the Polymorphic XML Parser. The document objects -representing the parsed file have an interesting polymorphism which allows that -the user of the parser can control which kind of objects are actually created. -The current API supports the element type as criterion for object/class -selection; future APIs will extend this concept such that arbitrary criterions -are possible (e.g. you may want to have different classes for different -namespaces). - -The current development goals of PXP are: - -- Full XML-1.0 conformance: The current pre-release is now very close to - strict XML-1.0 conformance. The only bigger difference to the standard is - that PXP sometimes accepts DTDs as legal while the standard forbids them - (non-deterministic content models). - One of the more important improvements since 0.2.10 is the possibility to - represent XML documents internally as UTF-8 strings, not only as ISO-8859-1 - strings. Thanks to Claudio Sacerdoti Coen who contributed a special lexer - preprocessor hiding the details of the UTF-8 encoding in the lexer - definitions. - -- Correctness of validation: The well-formedness and valididity constraints - must be implemented as correct as possible. The last stable release had - already a regression test covering many aspects of XML. The test suite will - be extended. - -- Parsing performance: It should be possible to process large amounts of data - in a reasoable period of time. The last stable release had many stages of - processing that wasted time. - The current pre-release is already 30 per cent faster than 0.2.10. - -- Simplicity of usage: Unlike parsers basing on imperative languages and DOM, - the usage of PXP should be simple, even for complex tasks. The current - parser API has already many advantages over DOM; especially it is well - integrated into the functional and object-oriented language O'Caml. You do - not have to deal with artificial representations like "node lists" while the - programming environment already provides good support for list structures. - The fact that O'Caml allows a functional programming style is interesting - for programs transforming XML trees. - -============================================================================== -Download the PXP pre-release -============================================================================== - -The current pre-release is available under -http://www.ocaml-programming.de/packages/pxp-pre-0.99.8.tar.gz [1]. There is -currently no documentation for this version of the software; it is recommended -to use the Markup manual [2] and compare it with the current module interfaces. - -Please note that this is work in progress; it may still contain bugs and -irregularities. - -The parser works only with OCaml-3. The parser needs the netstring package [3], -at least version 0.9.1. - -I am very interested in your opinion to PXP; please contact me [4]. - -============================================================================== -Author, Credits, Copying -============================================================================== - -PXP has been written by Gerd Stolpmann [5]; it contains contributions by -Claudio Sacerdoti Coen. You may copy it as you like, you may use it even for -commercial purposes as long as the license conditions are respected, see the -file LICENSE coming with the distribution. It allows almost everything. - -============================================================================== -Where to find the stable release -============================================================================== - -Here. [6] - - --------------------------- - -[1] see http://www.ocaml-programming.de/packages/pxp-pre-0.99.8.tar.gz - -[2] see http://www.ocaml-programming.de/packages/documentation/markup/manual - -[3] see http://www.ocaml-programming.de/packages/documentation/netstring - -[4] see mailto:gerd@gerd-stolpmann.de - -[5] see mailto:gerd@gerd-stolpmann.de - -[6] see http://www.ocaml-programming.de/packages/documentation/markup - - - diff --git a/helm/DEVEL/pxp/pxp/doc/PRERELEASE.xml b/helm/DEVEL/pxp/pxp/doc/PRERELEASE.xml deleted file mode 100644 index f155abd96..000000000 --- a/helm/DEVEL/pxp/pxp/doc/PRERELEASE.xml +++ /dev/null @@ -1,116 +0,0 @@ - - -%common; - - -up'> - - -%config; - -]> - - - - Pre-release of PXP, the XML parser for O'Caml - -

PXP is the new, completely revised and partly rewritten -validating XML parser -for O'Caml; the old name, "Markup", has been dropped. The current version -of PXP is still a bit experimental because it is not fully tested; however, -it is now stable enough to be used in experimental applications. -

- -

PXP will retain most parts of Markup's API; the name PXP -emphasizes the strengths of the API: it is the Polymorphic XML Parser. -The document objects representing the parsed file have an interesting -polymorphism which allows that the user of the parser can control -which kind of objects are actually created. The current API supports -the element type as criterion for object/class selection; future APIs will -extend this concept such that arbitrary criterions are possible -(e.g. you may want to have different classes for different namespaces). -

- -

The current development goals of PXP are:

- -
    -
  • Full XML-1.0 conformance: The current pre-release -is now very close to strict XML-1.0 conformance. The only bigger -difference to the standard is that PXP sometimes accepts DTDs as legal -while the standard forbids them (non-deterministic content models).

    - -

    One of the more important improvements since 0.2.10 is the possibility to -represent XML documents internally as UTF-8 strings, not only as ISO-8859-1 -strings. Thanks to Claudio Sacerdoti Coen who contributed a special lexer -preprocessor hiding the details of the UTF-8 encoding in the lexer definitions. -

    -
  • - -
  • Correctness of validation: The well-formedness -and valididity constraints must be implemented as correct as possible. -The last stable release had already a regression test covering many -aspects of XML. The test suite will be extended.

    -
  • - -
  • Parsing performance: It should be possible to -process large amounts of data in a reasoable period of time. The last -stable release had many stages of processing that wasted time.

    - -

    The current pre-release is already 30 per cent faster than -0.2.10.

    -
  • - -
  • Simplicity of usage: Unlike parsers basing on -imperative languages and DOM, the usage of PXP should be simple, even -for complex tasks. The current parser API has already many advantages -over DOM; especially it is well integrated into the functional and -object-oriented language O'Caml. You do not have to deal with -artificial representations like "node lists" while the programming -environment already provides good support for list structures. The -fact that O'Caml allows a functional programming style is interesting -for programs transforming XML trees.

    -
  • -
-
- - - Download the PXP pre-release - -

The current pre-release is available under - -&url.gps-ocaml-download;/pxp-pre-0.99.8.tar.gz. There is currently no -documentation for this version of the software; it is recommended to use the Markup manual and compare it with the current -module interfaces.

- -

Please note that this is work in progress; it may still contain bugs -and irregularities.

- -

The parser works only with OCaml-3. The parser needs the netstring package, at least version 0.9.1. -

- -

I am very interested in your opinion to PXP; please contact me.

-
- - - Author, Credits, Copying -

-PXP has been written by &person.gps;; it contains contributions by -Claudio Sacerdoti Coen. You may copy it as you like, -you may use it even for commercial purposes as long as the license conditions -are respected, see the file LICENSE coming with the distribution. It allows -almost everything. -

-
- - - Where to find the stable release -

Here.

-
- -
- diff --git a/helm/DEVEL/pxp/pxp/doc/README b/helm/DEVEL/pxp/pxp/doc/README deleted file mode 100644 index b7ad5de59..000000000 --- a/helm/DEVEL/pxp/pxp/doc/README +++ /dev/null @@ -1,247 +0,0 @@ -****************************************************************************** -README - PXP, the XML parser for O'Caml -****************************************************************************** - - -============================================================================== -Abstract -============================================================================== - -PXP is a validating parser for XML-1.0 which has been written entirely in -Objective Caml. - -PXP is the new name of the parser formerly known as "Markup". PXP means -"Polymorphic XML parser" and emphasizes its most useful property: that the API -is polymorphic and can be configured such that different objects are used to -store different types of elements. - -============================================================================== -Download -============================================================================== - -You can download PXP as gzip'ed tarball [1]. The parser needs the Netstring [2] -package (0.9.3). Note that PXP requires O'Caml 3.00. - -============================================================================== -User's Manual -============================================================================== - -The manual is included in the distribution both as Postscript document and -bunch of HTML files. An online version can be found here [3]. - -============================================================================== -Author, Credits, Copying -============================================================================== - -PXP has been written by Gerd Stolpmann [4]; it contains contributions by -Claudio Sacerdoti Coen. You may copy it as you like, you may use it even for -commercial purposes as long as the license conditions are respected, see the -file LICENSE coming with the distribution. It allows almost everything. - -Thanks also to Alain Frisch and Haruo Hosoya for discussions and bug reports. - -============================================================================== -Description -============================================================================== - -PXP is a validating XML parser for O'Caml [5]. It strictly complies to the -XML-1.0 [6] standard. - -The parser is simple to call, usually only one statement (function call) is -sufficient to parse an XML document and to represent it as object tree. - -Once the document is parsed, it can be accessed using a class interface. The -interface allows arbitrary access including transformations. One of the -features of the document representation is its polymorphic nature; it is simple -to add custom methods to the document classes. Furthermore, the parser can be -configured such that different XML elements are represented by objects created -from different classes. This is a very powerful feature, because it simplifies -the structure of programs processing XML documents. - -Note that the class interface does not comply to the DOM standard. It was not a -development goal to realize a standard API (industrial developers can this much -better than I); however, the API is powerful enough to be considered as -equivalent with DOM. More important, the interface is compatible with the XML -information model required by many XML-related standards. - ------------------------------------------------------------------------------- -Detailed feature list ------------------------------------------------------------------------------- - -- The XML instance is validated against the DTD; any violation of a validation - constraint leads to the rejection of the instance. The validator has been - carefully implemented, and conforms strictly to the standard. If needed, it - is also possible to run the parser in a well-formedness mode. - -- If possible, the validator applies a deterministic finite automaton to - validate the content models. This ensures that validation can always be - performed in linear time. However, in the case that the content models are - not deterministic, the parser uses a backtracking algorithm which can be - much slower. - It is also possible to reject non-deterministic content - models. - -- In particular, the validator also checks the complicated rules whether - parentheses are properly nested with respect to entities, and whether the - standalone declaration is satisfied. On demand, it is checked whether the - IDREF attributes only refer to existing nodes. - -- Entity references are automatically resolved while the XML text is being - scanned. It is not possible to recognize in the object tree where a - referenced entity begins or ends; the object tree only represents the - logical structure. - -- External entities are loaded using a configurable resolver infrastructure. - It is possible to connect the parser with an arbitrary XML source. - -- The parser can read XML text encoded in a variety of character sets. - Independent of this, it is possible to choose the encoding of the internal - representation of the tree nodes; the parser automatically converts the - input text to this encoding. Currently, the parser supports UTF-8 and - ISO-8859-1 as internal encodings. - -- The interface of the parser has been designed such that it is best - integrated into the language O'Caml. The first goal was simplicity of usage - which is achieved by many convenience methods and functions, and by allowing - the user to select which parts of the XML text are actually represented in - the tree. For example, it is possible to store processing instructions as - tree nodes, but the parser can also be configured such that these - instructions are put into hashtables. The information model is compatible - with the requirements of XML-related standards such as XPath. - -- In particular, the node tree can optionally contain or leave out processing - instructions and comments. It is also possible to generate a "super root" - object which is the parent of the root element. The attributes of elements - are normally not stored as nodes, but it is possible to get them wrapped - into nodes. - -- There is also an interface for DTDs; you can parse and access sequences of - declarations. The declarations are fully represented as recursive O'Caml - values. - ------------------------------------------------------------------------------- -Code examples ------------------------------------------------------------------------------- - -This distribution contains several examples: - -- validate: simply parses a document and prints all error messages - -- readme: Defines a DTD for simple "README"-like documents, and offers - conversion to HTML and text files [7]. - -- xmlforms: This is already a sophisticated application that uses XML as style - sheet language and data storage format. It shows how a Tk user interface can - be configured by an XML style, and how data records can be stored using XML. - ------------------------------------------------------------------------------- -Restrictions and missing features ------------------------------------------------------------------------------- - -The following restrictions apply that are not violations of the standard: - -- The attributes "xml:space", and "xml:lang" are not supported specially. (The - application can do this.) - -- The built-in support for SYSTEM and PUBLIC identifiers is limited to local - file access. There is no support for catalogs. The parser offers a hook to - add missing features. - -- It is currently not possible to check for interoperatibility with SGML. - -The following features are also missing: - -- There is no special support for namespaces. (Perhaps in the next release?) - -- There is no support for XPATH or XSLT. - -However, I hope that these features will be implemented soon, either by myself -or by contributors (who are invited to do so). - ------------------------------------------------------------------------------- -Recent Changes ------------------------------------------------------------------------------- - -- Changed in 1.0: - Support for document order. - -- Changed in 0.99.8: - Several fixes of bugs reported by Haruo Hosoya and Alain Frisch. - The class type "node" has been extended: you can go directly to the next and - previous nodes in the list; you can refer to nodes by position. - There are now some iterators for nodes: find, find_all, find_element, - find_all_elements, map_tree, iter_tree. - Experimental support for viewing attributes as nodes; I hope that helps - Alain writing his XPath evaluator. - The user's manual has been revised and is almost up to date. - -- Changed in 0.99.7: - There are now additional node types T_super_root, T_pinstr and T_comment, - and the parser is able to create the corresponding nodes. - The functions for character set conversion have been moved to the Netstring - package; they are not specific for XML. - -- Changed in 0.99.6: - Implemented a check on deterministic content models. Added an alternate - validator basing on a DFA. - This means that now all mandatory features for - an XML-1.0 parser are implemented! The parser is now substantially complete. - -- Changed in 0.99.5: - The handling of ID and IDREF attributes has changed. The index of nodes - containing an ID attribute is now separated from the document. Optionally - the parser now checks whether the IDREF attributes refer to existing - elements. - The element nodes can optionally store the location in the source XML code. - The method 'write' writes the XML tree in every supported encoding. - (Successor of 'write_compact_as_latin1'.) - Several smaller changes and fixes. - -- Changed in 0.99.4: - The module Pxp_reader has been modernized. The resolver classes are simpler - to use. There is now support for URLs. - The interface of Pxp_yacc has been improved: The type 'source' is now - simpler. The type 'domspec' has gone; the new 'spec' is opaque and performs - better. There are some new parsing modes. - Many smaller changes. - -- Changed in 0.99.3: - The markup_* modules have been renamed to pxp_*. There is a new - compatibility API that tries to be compatible with markup-0.2.10. - The type "encoding" is now a polymorphic variant. - -- Changed in 0.99.2: - Added checks for the constraints about the standalone declaration. - Added regression tests about attribute normalization, attribute checks, - standalone checks. - Fixed some minor errors of the attribute normalization function. - The bytecode/native archives are now separated in a general part, in a - ISO-8859-1-relevant part, and a UTF-8-relevant part. The parser can again be - compiled with ocamlopt. - -- Changed in 0.99.1: - In general, this release is an early pre-release of the next stable version - 1.00. I do not recommend to use it for serious work; it is still very - experimental! - The core of the parser has been rewritten using a self-written parser - generator. - The lexer has been restructured, and can now handle UTF-8 encoded files. - Numerous other changes. - - --------------------------- - -[1] see http://www.ocaml-programming.de/packages/pxp-1.0.tar.gz - -[2] see http://www.ocaml-programming.de/packages/documentation/netstring - -[3] see http://www.ocaml-programming.de/packages/documentation/pxp/manual - -[4] see mailto:gerd@gerd-stolpmann.de - -[5] see http://caml.inria.fr/ - -[6] see http://www.w3.org/TR/1998/REC-xml-19980210.html - -[7] This particular document is an example of this DTD! - - - diff --git a/helm/DEVEL/pxp/pxp/doc/README.xml b/helm/DEVEL/pxp/pxp/doc/README.xml deleted file mode 100644 index 34c7726ad..000000000 --- a/helm/DEVEL/pxp/pxp/doc/README.xml +++ /dev/null @@ -1,423 +0,0 @@ - - - - - - -Gerd Stolpmann'> ---> - - -%common; - - -up'> - - -%config; - -]> - - - - Abstract -

-PXP is a validating parser for XML-1.0 which has been written -entirely in Objective Caml. -

- -

PXP is the new name of the parser formerly known as "Markup". -PXP means "Polymorphic XML parser" and emphasizes its most useful -property: that the API is polymorphic and can be configured such that -different objects are used to store different types of elements.

-
- - - Download -

-You can download PXP as gzip'ed tarball. The parser needs the Netstring package (0.9.3). Note that PXP -requires O'Caml 3.00. -

-
- - - User's Manual -

-The manual is included in the distribution both as Postscript document and -bunch of HTML files. An online version can be found here. -

-
- - - Author, Credits, Copying -

-PXP has been written by &person.gps;; it contains contributions by -Claudio Sacerdoti Coen. You may copy it as you like, -you may use it even for commercial purposes as long as the license conditions -are respected, see the file LICENSE coming with the distribution. It allows -almost everything. -

- -

Thanks also to Alain Frisch and Haruo Hosoya for discussions and bug -reports.

-
- - - Description -

-PXP is a validating XML parser for O'Caml. It strictly complies to the -XML-1.0 standard. -

- -

The parser is simple to call, usually only one statement (function -call) is sufficient to parse an XML document and to represent it as object -tree.

- -

-Once the document is parsed, it can be accessed using a class interface. -The interface allows arbitrary access including transformations. One of -the features of the document representation is its polymorphic nature; -it is simple to add custom methods to the document classes. Furthermore, -the parser can be configured such that different XML elements are represented -by objects created from different classes. This is a very powerful feature, -because it simplifies the structure of programs processing XML documents. -

- -

-Note that the class interface does not comply to the DOM standard. It was not a -development goal to realize a standard API (industrial developers can this much -better than I); however, the API is powerful enough to be considered as -equivalent with DOM. More important, the interface is compatible with the -XML information model required by many XML-related standards. -

- - - Detailed feature list - -
    -
  • The XML instance is validated against the DTD; any violation of -a validation constraint leads to the rejection of the instance. The validator -has been carefully implemented, and conforms strictly to the standard. If -needed, it is also possible to run the parser in a well-formedness mode.

    -
  • -
  • If possible, the validator applies a deterministic finite -automaton to validate the content models. This ensures that validation can -always be performed in linear time. However, in the case that the content -models are not deterministic, the parser uses a backtracking algorithm which -can be much slower. - It is also possible to reject non-deterministic content -models.

    -
  • -
  • In particular, the validator also checks the complicated rules -whether parentheses are properly nested with respect to entities, and whether -the standalone declaration is satisfied. On demand, it is checked whether the -IDREF attributes only refer to existing nodes.

    -
  • -
  • Entity references are automatically resolved while the XML text -is being scanned. It is not possible to recognize in the object tree where a -referenced entity begins or ends; the object tree only represents the logical structure.

    -
  • -
  • External entities are loaded using a configurable resolver -infrastructure. It is possible to connect the parser with an arbitrary XML source.

    -
  • -
  • The parser can read XML text encoded in a variety of character -sets. Independent of this, it is possible to choose the encoding of the -internal representation of the tree nodes; the parser automatically converts -the input text to this encoding. Currently, the parser supports UTF-8 and -ISO-8859-1 as internal encodings.

    -
  • -
  • The interface of the parser has been designed such that it is -best integrated into the language O'Caml. The first goal was simplicity of -usage which is achieved by many convenience methods and functions, and by -allowing the user to select which parts of the XML text are actually -represented in the tree. For example, it is possible to store processing -instructions as tree nodes, but the parser can also be configured such that -these instructions are put into hashtables. The information model is compatible -with the requirements of XML-related standards such as XPath.

    -
  • -
  • In particular, the node tree can optionally contain or leave out -processing instructions and comments. It is also possible to generate a "super -root" object which is the parent of the root element. The attributes of -elements are normally not stored as nodes, but it is possible to get them -wrapped into nodes.

    -
  • -
  • There is also an interface for DTDs; you can parse and access -sequences of declarations. The declarations are fully represented as recursive -O'Caml values. -

    -
  • -
-
- - - - Code examples -

-This distribution contains several examples:

-
    -
  • -validate: simply parses a -document and prints all error messages -

  • - -
  • -readme: Defines a DTD for simple "README"-like documents, and offers -conversion to HTML and text filesThis particular document is an -example of this DTD!. -

  • - -
  • -xmlforms: This is already a -sophisticated application that uses XML as style sheet language and data -storage format. It shows how a Tk user interface can be configured by an -XML style, and how data records can be stored using XML. -

  • -
-
- - - Restrictions and missing features -

-The following restrictions apply that are not violations of the standard: -

-
    -
  • -The attributes "xml:space", and "xml:lang" are not supported specially. - (The application can do this.)

  • - -
  • -The built-in support for SYSTEM and PUBLIC identifiers is limited to - local file access. There is no support for catalogs. The parser offers - a hook to add missing features.

  • - -
  • -It is currently not possible to check for interoperatibility with SGML. -

  • -
- -

The following features are also missing:

-
    -
  • There is no special support for namespaces. (Perhaps in the next release?)

    -
  • -
  • There is no support for XPATH or XSLT.

    -
  • -
-

However, I hope that these features will be implemented soon, either by -myself or by contributors (who are invited to do so).

-
- - - Recent Changes -
    -
  • -

    Changed in 1.0:

    -

    Support for document order.

    -
  • -
  • -

    Changed in 0.99.8:

    -

    Several fixes of bugs reported by Haruo Hosoya and Alain -Frisch.

    -

    The class type "node" has been extended: you can go directly to -the next and previous nodes in the list; you can refer to nodes by -position.

    -

    There are now some iterators for nodes: find, find_all, -find_element, find_all_elements, map_tree, iter_tree.

    -

    Experimental support for viewing attributes as nodes; I hope that -helps Alain writing his XPath evaluator.

    -

    The user's manual has been revised and is almost up to date.

    -
  • -
  • -

    Changed in 0.99.7:

    -

    There are now additional node types T_super_root, T_pinstr and -T_comment, and the parser is able to create the corresponding nodes.

    -

    The functions for character set conversion have been moved to -the Netstring package; they are not specific for XML.

    -
  • -
  • -

    Changed in 0.99.6:

    -

    Implemented a check on deterministic content models. Added -an alternate validator basing on a DFA. - This means that now all mandatory -features for an XML-1.0 parser are implemented! The parser is now substantially -complete.

    -
  • -
  • -

    Changed in 0.99.5:

    -

    The handling of ID and IDREF attributes has changed. The -index of nodes containing an ID attribute is now separated from the document. -Optionally the parser now checks whether the IDREF attributes refer to -existing elements.

    -

    The element nodes can optionally store the location in the -source XML code.

    -

    The method 'write' writes the XML tree in every supported -encoding. (Successor of 'write_compact_as_latin1'.)

    -

    Several smaller changes and fixes.

    -
  • -
  • -

    Changed in 0.99.4:

    -

    The module Pxp_reader has been modernized. The resolver classes -are simpler to use. There is now support for URLs.

    -

    The interface of Pxp_yacc has been improved: The type 'source' -is now simpler. The type 'domspec' has gone; the new 'spec' is opaque and -performs better. There are some new parsing modes.

    -

    Many smaller changes.

    -
  • -
  • -

    Changed in 0.99.3:

    -

    The markup_* modules have been renamed to pxp_*. There is a new -compatibility API that tries to be compatible with markup-0.2.10.

    -

    The type "encoding" is now a polymorphic variant.

    -
  • -
  • -

    Changed in 0.99.2:

    -

    Added checks for the constraints about the standalone -declaration.

    -

    Added regression tests about attribute normalization, -attribute checks, standalone checks.

    -

    Fixed some minor errors of the attribute normalization -function.

    -

    The bytecode/native archives are now separated in -a general part, in a ISO-8859-1-relevant part, and a UTF-8-relevant -part. The parser can again be compiled with ocamlopt.

    -
  • -
  • -

    Changed in 0.99.1:

    -

    In general, this release is an early pre-release of the -next stable version 1.00. I do not recommend to use it for serious -work; it is still very experimental!

    -

    The core of the parser has been rewritten using a self-written -parser generator.

    -

    The lexer has been restructured, and can now handle UTF-8 -encoded files.

    -

    Numerous other changes.

    -
  • - - -
-
-
-
- diff --git a/helm/DEVEL/pxp/pxp/doc/SPEC b/helm/DEVEL/pxp/pxp/doc/SPEC deleted file mode 100644 index 28e6914ce..000000000 --- a/helm/DEVEL/pxp/pxp/doc/SPEC +++ /dev/null @@ -1,185 +0,0 @@ -****************************************************************************** -Notes on the XML specification -****************************************************************************** - - -============================================================================== -This document -============================================================================== - -There are some points in the XML specification which are ambiguous. The -following notes discuss these points, and describe how this parser behaves. - -============================================================================== -Conditional sections and the token ]]> -============================================================================== - -It is unclear what happens if an ignored section contains the token ]]> at -places where it is normally allowed, i.e. within string literals and comments, -e.g. - - --> ]]> - -On the one hand, the production rule of the XML grammar does not treat such -tokens specially. Following the grammar, already the first ]]> ends the -conditional section - - - -and the other tokens are included into the DTD. - -On the other hand, we can read: "Like the internal and external DTD subsets, a -conditional section may contain one or more complete declarations, comments, -processing instructions, or nested conditional sections, intermingled with -white space" (XML 1.0 spec, section 3.4). Complete declarations and comments -may contain ]]>, so this is contradictory to the grammar. - -The intention of conditional sections is to include or exclude the section -depending on the current replacement text of a parameter entity. Almost always -such sections are used as in - - (or "IGNORE") - - -This means that if it is possible to include a section it must also be legal to -ignore the same section. This is a strong indication that the token ]]> must -not count as section terminator if it occurs in a string literal or comment. - -This parser implements the latter. - -============================================================================== -Conditional sections and the inclusion of parameter entities -============================================================================== - -It is unclear what happens if an ignored section contains a reference to a -parameter entity. In most cases, this is not problematic because nesting of -parameter entities must respect declaration braces. The replacement text of -parameter entities must either contain a whole number of declarations or only -inner material of one declaration. Almost always it does not matter whether -these references are resolved or not (the section is ignored). - -But there is one case which is not explicitly specified: Is it allowed that the -replacement text of an entity contains the end marker ]]> of an ignored -conditional section? Example: - -"> - must be contained in -the same entity as the corresponding of -declarations). So it is possible to conclude that ]]> may be in another entity. - -Of course, there are many arguments not to allow such constructs: The resulting -code is incomprehensive, and parsing takes longer (especially if the entities -are external). I think the best argument against this kind of XML is that the -XML spec is not detailed enough, as it contains no rules where entity -references should be recognized and where not. For example: - -"> -"> - - -Which token ]]> counts? From a logical point of view, the ]]> in the third line -ends the conditional section. As already pointed out, the XML spec permits the -interpretation that ]]> is recognized even in string literals, and this may be -also true if it is "imported" from a separate entity; and so the first ]]> -denotes the end of the section. - -As a practical solution, this parser does not expand parameter entities in -ignored sections. Furthermore, it is also not allowed that the ending ]]> of -ignored or included sections is contained in a different entity than the -starting -%ext; -%ent; - -"ext" contains: - -"> - - - -Here, the reference %ent; would be illegal if the standalone declaration is -strictly interpreted. This parser handles the references %ent; and %ext; -equivalently which means that %ent; is allowed, but the element type "el" is -treated as externally declared. - -General entities can occur within the DTD, but they can only be contained in -the default value of attributes, or in the definition of other general -entities. The latter can be ignored, because the check will be repeated when -the entities are expanded. Though, general entities occuring in default -attribute values are actually checked at the moment when the default is used in -an element instance. - -General entities occuring in the document body are always checked. - -NDATA entities can occur in ENTITY attribute values; either in the element -instance or in the default declaration. Both cases are checked. - diff --git a/helm/DEVEL/pxp/pxp/doc/SPEC.xml b/helm/DEVEL/pxp/pxp/doc/SPEC.xml deleted file mode 100644 index 906f45a79..000000000 --- a/helm/DEVEL/pxp/pxp/doc/SPEC.xml +++ /dev/null @@ -1,226 +0,0 @@ - - -%common; - - -up'> - - -%config; - -]> - - - - - This document -

There are some points in the XML specification which are ambiguous. -The following notes discuss these points, and describe how this parser -behaves.

-
- - - Conditional sections and the token ]]> - -

It is unclear what happens if an ignored section contains the -token ]]> at places where it is normally allowed, i.e. within string -literals and comments, e.g. - - -<![IGNORE[ <!-- ]]> --> ]]> - - -On the one hand, the production rule of the XML grammar does not treat such -tokens specially. Following the grammar, already the first ]]> ends -the conditional section - - -<![IGNORE[ <!-- ]]> - - -and the other tokens are included into the DTD.

- -

On the other hand, we can read: "Like the internal and external DTD subsets, -a conditional section may contain one or more complete declarations, comments, -processing instructions, or nested conditional sections, intermingled with -white space" (XML 1.0 spec, section 3.4). Complete declarations and comments -may contain ]]>, so this is contradictory to the grammar.

- -

The intention of conditional sections is to include or exclude the section -depending on the current replacement text of a parameter entity. Almost -always such sections are used as in - - -<!ENTITY % want.a.feature.or.not "INCLUDE"> (or "IGNORE") -<![ %want.a.feature.or.not; [ ... ]]> - - -This means that if it is possible to include a section it must also be -legal to ignore the same section. This is a strong indication that -the token ]]> must not count as section terminator if it occurs -in a string literal or comment.

- -

This parser implements the latter.

- -
- - - Conditional sections and the inclusion of parameter entities - -

It is unclear what happens if an ignored section contains a reference -to a parameter entity. In most cases, this is not problematic because -nesting of parameter entities must respect declaration braces. The -replacement text of parameter entities must either contain a whole -number of declarations or only inner material of one declaration. Almost always -it does not matter whether these references are resolved or not -(the section is ignored).

- -

But there is one case which is not explicitly specified: Is it allowed -that the replacement text of an entity contains the end marker ]]> -of an ignored conditional section? Example: - - -<!ENTITY % end "]]>"> -<![ IGNORE [ %end; - - -We do not find the statement in the XML spec that the ]]> must be contained -in the same entity as the corresponding <![ (as for the tokens <! and -> of declarations). So it is possible to conclude that ]]> may be in -another entity.

- -

Of course, there are many arguments not to allow such constructs: The -resulting code is incomprehensive, and parsing takes longer (especially if the -entities are external). I think the best argument against this kind of XML -is that the XML spec is not detailed enough, as it contains no rules where -entity references should be recognized and where not. For example: - - -<!ENTITY % y "]]>"> -<!ENTITY % x "<!ENTITY z '<![CDATA[some text%y;'>"> -<![ IGNORE [ %x; ]]> - - -Which token ]]> counts? From a logical point of view, the ]]> in the -third line ends the conditional section. As already pointed out, the XML spec -permits the interpretation that ]]> is recognized even in string literals, -and this may be also true if it is "imported" from a separate entity; and so -the first ]]> denotes the end of the section.

- -

As a practical solution, this parser does not expand parameter entities -in ignored sections. Furthermore, it is also not allowed that the ending ]]> -of ignored or included sections is contained in a different entity than the -starting <![ token.

-
- - - - Standalone documents and attribute normalization - -

-If a document is declared as stand-alone, a restriction on the effect of -attribute normalization takes effect for attributes declared in external -entities. Normally, the parser knows the type of the attribute from -the ATTLIST declaration, and it can normalize attribute values depending -on their types. For example, an NMTOKEN attribute can be written with -leading or trailing spaces, but the parser returns always the nmtoken -without such added spaces; in contrast to this, a CDATA attribute is -not normalized in this way. For stand-alone document the type information is -not available if the ATTLIST declaration is located in an external -entity. Because of this, the XML spec demands that attribute values must -be written in their normal form in this case, i.e. without additional -spaces. -

-

This parser interprets this restriction as follows. Obviously, -the substitution of character and entity references is not considered -as a "change of the value" as a result of the normalization, because -these operations will be performed identically if the ATTLIST declaration -is not available. The same applies to the substitution of TABs, CRs, -and LFs by space characters. Only the removal of spaces depending on -the type of the attribute changes the value if the ATTLIST is not -available. -

-

This means in detail: CDATA attributes never violate the -stand-alone status. ID, IDREF, NMTOKEN, ENTITY, NOTATION and enumerator -attributes must not be written with leading and/or trailing spaces. IDREF, -ENTITIES, and NMTOKENS attributes must not be written with extra spaces at the -beginning or at the end of the value, or between the tokens of the list. -

-

The whole check is dubious, because the attribute type expresses also a -semantical constraint, not only a syntactical one. At least this parser -distinguishes strictly between single-value and list types, and returns the -attribute values differently; the first are represented as Value s (where s is -a string), the latter are represented as Valuelist [s1; s2; ...; sN]. The -internal representation of the value is dependent on the attribute type, too, -such that even normalized values are processed differently depending on -whether the attribute has list type or not. For this parser, it makes still a -difference whether a value is normalized and processed as if it were CDATA, or -whether the value is processed according to its declared type. -

-

The stand-alone check is included to be able to make a statement -whether other, well-formedness parsers can process the document. Of course, -these parsers always process attributes as CDATA, and the stand-alone check -guarantees that these parsers will always see the normalized values. -

-
- - - Standalone documents and the restrictions on entity -references -

-Stand-alone documents must not refer to entities which are declared in an -external entity. This parser applies this rule only: to general and NDATA -entities when they occur in the document body (i.e. not in the DTD); and to -general and NDATA entities occuring in default attribute values declared in the -internal subset of the DTD. -

-

-Parameter entities are out of discussion for the stand-alone property. If there -is a parameter entity reference in the internal subset which was declared in an -external entity, it is not available in the same way as the external entity is -not available that contains its declaration. Because of this "equivalence", -parameter entity references are not checked on violations against the -stand-alone declaration. It simply does not matter. - Illustration: -

- -

-Main document: - - -%ext; -%ent; -]]> - -"ext" contains: - - "> -]]> -

- -

Here, the reference %ent; would be illegal if the standalone -declaration is strictly interpreted. This parser handles the references -%ent; and %ext; equivalently which means that %ent; is allowed, but the -element type "el" is treated as externally declared. -

- -

-General entities can occur within the DTD, but they can only be contained in -the default value of attributes, or in the definition of other general -entities. The latter can be ignored, because the check will be repeated when -the entities are expanded. Though, general entities occuring in default -attribute values are actually checked at the moment when the default is -used in an element instance. -

-

-General entities occuring in the document body are always checked.

-

-NDATA entities can occur in ENTITY attribute values; either in the element -instance or in the default declaration. Both cases are checked. -

-
- -
diff --git a/helm/DEVEL/pxp/pxp/doc/design.txt b/helm/DEVEL/pxp/pxp/doc/design.txt deleted file mode 100644 index bf75d0618..000000000 --- a/helm/DEVEL/pxp/pxp/doc/design.txt +++ /dev/null @@ -1,340 +0,0 @@ ------------------------------------------------- -*- indented-text -*- -Some Notes About the Design: ----------------------------------------------------------------------- - ----------------------------------------------------------------------- -Compilation ----------------------------------------------------------------------- - -Compilation is non-trivial because: - - - The lexer and parser generators ocamlllex resp. ocamlyacc normally - create code such that the parser module precedes the lexer module. - THIS design requires that the lexer layer precedes the entity layer - which precedes the parser layer, because the parsing results modify - the behaviour of the lexer and entity layers. There is no way to get - around this because of the nature of XML. - - So the dependency relation of the lexer and the parser is modified; - in particular the "token" type that is normally defined by the - generated parser is moved to a common prdecessor of both lexer - and parser. - - - Another modification of the standard way of handling parsers is that - the parser is turned into an object. This is necessary because the - whole parser is polymorphic, i.e. there is a type parameter (the - type of the node extension). - -...................................................................... - -First some modules are generated as illustrated by the following -diagram: - - - markup_yacc.mly - | | - \|/ \|/ [ocamlyacc, 1] - V V - markup_yacc.mli markup_yacc.ml - | --> renamed into markup_yacc.ml0 - [awk, 2] \|/ | - V \|/ [sed, 3] - markup_yacc_token.mlf V - | | markup_yacc.ml - markup_lexer_types_ | | - shadow.mli | | | markup_lexer_types_ - \|/ [sed, \|/ | shadow.ml - V 4] V | | - markup_lexer_types.mli | | [sed, 4] - \|/ \|/ - V V - markup_lexer_types.ml - - - markup_yacc_shadow.mli - | - \|/ [replaces, 5] - V - markup_yacc.mli - - - - markup_lexers.mll - | - \|/ [ocamllex, 6] - V - markup_lexers.ml - - -Notes: - - (1) ocamlyacc generates both a module and a module interface. - The module is postprocessed in step (3). The interface cannot - be used, but it contains the definition of the "token" type. - This definition is extracted in step (2). The interface is - completely replaced in step (5) by a different file. - - (2) An "awk" script extracts the definition of the type "token". - "token" is created by ocamlyacc upon the %token directives - in markup_yacc.mly, and normally "token" is defined in - the module generated by ocamlyacc. This turned out not to be - useful as the module dependency must be that the lexer is - an antecedent of the parser and not vice versa (as usually), - so the "token" type is "moved" to the module Markup_lexer_types - which is an antecedent of both the lexer and the parser. - - (3) A "sed" script turns the generated parser into an object. - This is rather simple; some "let" definitions must be rewritten - as "val" definitions, the other "let" definitions as - "method" definitions. The parser object is needed because - the whole parser has a polymorphic type parameter. - - (4) The implementation and definition of Markup_lexer_types are - both generated by inserting the "token" type definition - (in markup_lexer_types.mlf) into two pattern files, - markup_lexer_types_shadow.ml resp. -.mli. The point of insertion - is marked by the string INCLUDE_HERE. - - (5) The generated interface of the Markup_yacc module is replaced - by a hand-written file. - - (6) ocamllex generates the lexer; this process is not patched in any - way. - -...................................................................... - -After the additional modules have been generated, compilation proceeds -in the usual manner. - - ----------------------------------------------------------------------- -Hierarchy of parsing layers: ----------------------------------------------------------------------- - -From top to bottom: - - - Parser: Markup_yacc - + gets input stream from the main entity object - + checks most of the grammar - + creates the DTD object as side-effect - + creates the element tree as side-effect - + creates further entity objects that are entered into the DTD - - Entity layer: Markup_entity - + gets input stream from the lexers, or another entity object - + handles entity references: if a reference is encountered the - input stream is redirected such that the tokens come from the - referenced entity object - + handles conditional sections - - Lexer layer: Markup_lexers - + gets input from lexbuffers created by resolvers - + different lexers for different lexical contexts - + a lexer returns pairs (token,lexid), where token is the scanned - token, and lexid is the name of the lexer that must be used for - the next token - - Resolver layer: Markup_entity - + a resolver creates the lexbuf from some character source - + a resolver recodes the input and handles the encoding scheme - ----------------------------------------------------------------------- -The YACC based parser ----------------------------------------------------------------------- - -ocamlyacc allows it to pass an arbitrary 'next_token' function to the -parsing functions. We always use 'en # next_token()' where 'en' is the -main entity object representing the main file to be parsed. - -The parser is not functional, but uses mainly side-effects to accumulate -the structures that have been recognized. This is very important for the -entity definitions, because once an entity definition has been found there -may be a reference to it which is handled by the entity layer (which is -below the yacc layer). This means that such a definition modifies the -token source of the parser, and this can only be handled by side-effects -(at least in a sensible manner; a purely functional parser would have to -pass unresolved entity references to its caller, which would have to -resolve the reference and to re-parse the whole document!). - -Note that also element definitions profit from the imperative style of -the parser; an element instance can be validated directly once the end -tag has been read in. - ----------------------------------------------------------------------- -The entity layer ----------------------------------------------------------------------- - -The parser gets the tokens from the main entity object. This object -controls the underlying lexing mechanism (see below), and already -interprets the following: - -- Conditional sections (if they are allowed in this entity): - The structures and are - recognized and interpreted. - - This would be hard to realize by the yacc parser, because: - - INCLUDE and IGNORE are not recognized as lexical keywords but as names. - This means that the parser cannot select different rules for them. - - The text after IGNORE requires a different lexical handling. - -- Entity references: &name; and %name; - The named entity is looked up and the input source is redirected to it, i.e. - if the main entity object gets the message 'next_token' this message is - forwarded to the referenced entity. (This entity may choose to forward the - message again to a third entity, and so on.) - - There are some fine points: - - - It is okay that redirection happens at token level, not at character level: - + General entities must always match the 'content' production, and because - of this they must always consist of a whole number of tokens. - + If parameter entities are resolved, the XML specification states that - a space character is inserted before and after the replacement text. - This also means that such entities always consists of a whole number - of tokens. - - - There are some "nesting constraints": - + General entities must match the 'content' production. Because of this, - the special token Begin_entity is inserted before the first token of - the entity, and End_entity is inserted just before the Eof token. The - brace Begin_entity...End_entity is recognized by the yacc parser, but - only in the 'content' production. - + External parameter entities must match 'extSubsetDecl'. Again, - Begin_entity and End_entity tokens embrace the inner token stream. - The brace Begin_entity...End_entity is recognized by the yacc parser - at the appropriate position. - (As general and parameter entities are used in different contexts - (document vs. DTD), both kinds of entities can use the same brace - Begin_entity...End_entity.) - + TODO: - The constraints for internal parameter entities are not yet checked. - - - Recursive references can be detected because entities must be opened - before the 'next_token' method can be invoked. - ----------------------------------------------------------------------- -The lexer layer ----------------------------------------------------------------------- - -There are five main lexers, and a number of auxiliary lexers. The five -main lexers are: - -- Document (function scan_document): - Scans an XML document outside the DTD and outside the element instance. - -- Content (function scan_content): - Scans an element instance, but not within tags. - -- Within_tag (function scan_within_tag): - Scans within <...>, i.e. a tag denoting an element instance. - -- Document_type (function scan_document_type): - Scans after . - -- Declaration (function scan_declaration): - Scans sequences of declarations - -Why several lexers? Because there are different lexical rules in these -five regions of an XML document. - -Every lexer not only produces tokens, but also the name of the next lexer -to use. For example, if the Document lexer scans " - ]> - ∅ - - This is illegal, and the presence of an empty Begin_entity/End_entity pair - helps to recognize this. diff --git a/helm/DEVEL/pxp/pxp/doc/dist-common.xml b/helm/DEVEL/pxp/pxp/doc/dist-common.xml deleted file mode 100644 index d18a1500f..000000000 --- a/helm/DEVEL/pxp/pxp/doc/dist-common.xml +++ /dev/null @@ -1,123 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Gerd Stolpmann'> - - - diff --git a/helm/DEVEL/pxp/pxp/doc/manual/Makefile b/helm/DEVEL/pxp/pxp/doc/manual/Makefile deleted file mode 100644 index 5a3e1ffab..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/Makefile +++ /dev/null @@ -1,82 +0,0 @@ -DOCBOOK_HTML = /usr/share/sgml/docbkdsl/html -DOCBOOK_PRINT = /usr/share/sgml/docbkdsl/print -SRC = $(PWD)/src - -.PHONY: html ps - -default: html ps - -html: html/book1.htm html/pic/done - -ps: ps/markup.ps ps/pic/done - - -src/readme.ent: ../../examples/readme/to_html.ml - src/getcode.ml <../../examples/readme/to_html.ml >src/readme.ent - -src/yacc.mli.ent: ../../pxp_yacc.mli - src/getcode.ml <../../pxp_yacc.mli >src/yacc.mli.ent - -src/dtd.mli.ent: ../../pxp_dtd.mli - src/getcode.ml <../../pxp_dtd.mli >src/dtd.mli.ent - -html/book1.htm: src/*.sgml src/readme.ent src/yacc.mli.ent src/dtd.mli.ent - mkdir -p html - cp src/markup.css html; \ - cd html; \ - rm -f *.htm*; \ - jade -t sgml -D$(DOCBOOK_HTML) -D$(SRC) -ihtml markup.sgml; \ - true - touch html/TIMESTAMP - -html/pic/done: src/pic/*.fig - mkdir -p html/pic - l=`cd src/pic; echo *.fig`; \ - for x in $$l; do fig2dev -L gif src/pic/$$x html/pic/`basename $$x .fig`.gif; done - touch html/pic/done - -#man: src/findlib_reference.xml -# mkdir -p man -# cd man; \ -# rm -f *.[0-9]; \ -# db2man <../src/findlib_reference.xml - -ps/markup.tex: src/*.sgml src/readme.ent src/yacc.mli.ent src/dtd.mli.ent - mkdir -p ps - cd ps; \ - jade -t tex -D$(DOCBOOK_PRINT) -D$(SRC) markup.sgml; \ - true - -ps/markup.dvi: ps/markup.tex ps/pic/done - cd ps; \ - jadetex markup.tex; \ - jadetex markup.tex; \ - jadetex markup.tex - -ps/markup.ps: ps/markup.dvi - cd ps; \ - dvips -f markup.ps - -ps/pic/done: src/pic/*.fig - mkdir -p ps/pic - l=`cd src/pic; echo *.fig`; \ - for x in $$l; do fig2dev -L ps -m 0.8 src/pic/$$x ps/pic/`basename $$x .fig`.ps; done - touch ps/pic/done - -.SUFFIXES: .xml .sgml - -.sgml.xml: - sx -xndata $< >$@; true - - - -clean: - rm -rf html man ps - rm -f src/readme.ent - -CLEAN: clean - -distclean: - rm -f src/*~ - rm -f *~ - rm -f ps/*.aux ps/*.dvi ps/*.log ps/*.tex diff --git a/helm/DEVEL/pxp/pxp/doc/manual/html/TIMESTAMP b/helm/DEVEL/pxp/pxp/doc/manual/html/TIMESTAMP deleted file mode 100644 index e69de29bb..000000000 diff --git a/helm/DEVEL/pxp/pxp/doc/manual/html/c1567.html b/helm/DEVEL/pxp/pxp/doc/manual/html/c1567.html deleted file mode 100644 index ab88e87bf..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/html/c1567.html +++ /dev/null @@ -1,434 +0,0 @@ -Configuring and calling the parser
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Chapter 4. Configuring and calling the parser

4.1. Overview

There are the following main functions invoking the parser (in Pxp_yacc): - -

  • parse_document_entity: You want to -parse a complete and closed document consisting of a DTD and the document body; -the body is validated against the DTD. This mode is interesting if you have a -file - -

    <!DOCTYPE root ... [ ... ] > <root> ... </root>
    - -and you can accept any DTD that is included in the file (e.g. because the file -is under your control).

  • parse_wfdocument_entity: You want to -parse a complete and closed document consisting of a DTD and the document body; -but the body is not validated, only checked for well-formedness. This mode is -preferred if validation costs too much time or if the DTD is missing.

  • parse_dtd_entity: You want only to -parse an entity (file) containing the external subset of a DTD. Sometimes it is -interesting to read such a DTD, for example to compare it with the DTD included -in a document, or to apply the next mode:

  • parse_content_entity: You want only to -parse an entity (file) containing a fragment of a document body; this fragment -is validated against the DTD you pass to the function. Especially, the fragment -must not have a <!DOCTYPE> clause, and must directly -begin with an element. The element is validated against the DTD. This mode is -interesting if you want to check documents against a fixed, immutable DTD.

  • parse_wfcontent_entity: This function -also parses a single element without DTD, but does not validate it.

  • extract_dtd_from_document_entity: This -function extracts the DTD from a closed document consisting of a DTD and a -document body. Both the internal and the external subsets are extracted.

In many cases, parse_document_entity is the preferred mode -to parse a document in a validating way, and -parse_wfdocument_entity is the mode of choice to parse a -file while only checking for well-formedness.

There are a number of variations of these modes. One important application of a -parser is to check documents of an untrusted source against a fixed DTD. One -solution is to not allow the <!DOCTYPE> clause in -these documents, and treat the document like a fragment (using mode -parse_content_entity). This is very simple, but -inflexible; users of such a system cannot even define additional entities to -abbreviate frequent phrases of their text.

It may be necessary to have a more intelligent checker. For example, it is also -possible to parse the document to check fully, i.e. with DTD, and to compare -this DTD with the prescribed one. In order to fully parse the document, mode -parse_document_entity is applied, and to get the DTD to -compare with mode parse_dtd_entity can be used.

There is another very important configurable aspect of the parser: the -so-called resolver. The task of the resolver is to locate the contents of an -(external) entity for a given entity name, and to make the contents accessible -as a character stream. (Furthermore, it also normalizes the character set; -but this is a detail we can ignore here.) Consider you have a file called -"main.xml" containing - -

<!ENTITY % sub SYSTEM "sub/sub.xml">
-%sub;
- -and a file stored in the subdirectory "sub" with name -"sub.xml" containing - -
<!ENTITY % subsub SYSTEM "subsub/subsub.xml">
-%subsub;
- -and a file stored in the subdirectory "subsub" of -"sub" with name "subsub.xml" (the -contents of this file do not matter). Here, the resolver must track that -the second entity subsub is located in the directory -"sub/subsub", i.e. the difficulty is to interpret the -system (file) names of entities relative to the entities containing them, -even if the entities are deeply nested.

There is not a fixed resolver already doing everything right - resolving entity -names is a task that highly depends on the environment. The XML specification -only demands that SYSTEM entities are interpreted like URLs -(which is not very precise, as there are lots of URL schemes in use), hoping -that this helps overcoming the local peculiarities of the environment; the idea -is that if you do not know your environment you can refer to other entities by -denoting URLs for them. I think that this interpretation of -SYSTEM names may have some applications in the internet, but -it is not the first choice in general. Because of this, the resolver is a -separate module of the parser that can be exchanged by another one if -necessary; more precisely, the parser already defines several resolvers.

The following resolvers do already exist: - -

  • Resolvers reading from arbitrary input channels. These -can be configured such that a certain ID is associated with the channel; in -this case inner references to external entities can be resolved. There is also -a special resolver that interprets SYSTEM IDs as URLs; this resolver can -process relative SYSTEM names and determine the corresponding absolute URL.

  • A resolver that reads always from a given O'Caml -string. This resolver is not able to resolve further names unless the string is -not associated with any name, i.e. if the document contained in the string -refers to an external entity, this reference cannot be followed in this -case.

  • A resolver for file names. The SYSTEM -name is interpreted as file URL with the slash "/" as separator for -directories. - This resolver is derived from the generic URL resolver.

- -The interface a resolver must have is documented, so it is possible to write -your own resolver. For example, you could connect the parser with an HTTP -client, and resolve URLs of the HTTP namespace. The resolver classes support -that several independent resolvers are combined to one more powerful resolver; -thus it is possible to combine a self-written resolver with the already -existing resolvers.

Note that the existing resolvers only interpret SYSTEM -names, not PUBLIC names. If it helps you, it is possible to -define resolvers for PUBLIC names, too; for example, such a -resolver could look up the public name in a hash table, and map it to a system -name which is passed over to the existing resolver for system names. It is -relatively simple to provide such a resolver.


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Details of the mapping from XML text to the tree representationUpResolvers and sources
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Chapter 1. What is XML?

1.1. Introduction

XML (short for Extensible Markup Language) -generalizes the idea that text documents are typically structured in sections, -sub-sections, paragraphs, and so on. The format of the document is not fixed -(as, for example, in HTML), but can be declared by a so-called DTD (document -type definition). The DTD describes only the rules how the document can be -structured, but not how the document can be processed. For example, if you want -to publish a book that uses XML markup, you will need a processor that converts -the XML file into a printable format such as Postscript. On the one hand, the -structure of XML documents is configurable; on the other hand, there is no -longer a canonical interpretation of the elements of the document; for example -one XML DTD might want that paragraphes are delimited by -para tags, and another DTD expects p tags -for the same purpose. As a result, for every DTD a new processor is required.

Although XML can be used to express structured text documents it is not limited -to this kind of application. For example, XML can also be used to exchange -structured data over a network, or to simply store structured data in -files. Note that XML documents cannot contain arbitrary binary data because -some characters are forbidden; for some applications you need to encode binary -data as text (e.g. the base 64 encoding).

1.1.1. The "hello world" example

The following example shows a very simple DTD, and a corresponding document -instance. The document is structured such that it consists of sections, and -that sections consist of paragraphs, and that paragraphs contain plain text:

<!ELEMENT document (section)+>
-<!ELEMENT section (paragraph)+>
-<!ELEMENT paragraph (#PCDATA)>

The following document is an instance of this DTD:

<?xml version="1.0" encoding="ISO-8859-1"?>
-<!DOCTYPE document SYSTEM "simple.dtd">
-<document>
-  <section>
-    <paragraph>This is a paragraph of the first section.</paragraph>
-    <paragraph>This is another paragraph of the first section.</paragraph>
-  </section>
-  <section>
-    <paragraph>This is the only paragraph of the second section.</paragraph>
-  </section>
-</document>

As in HTML (and, of course, in grand-father SGML), the "pieces" of -the document are delimited by element braces, i.e. such a piece begins with -<name-of-the-type-of-the-piece> and ends with -</name-of-the-type-of-the-piece>, and the pieces are -called elements. Unlike HTML and SGML, both start tags and -end tags (i.e. the delimiters written in angle brackets) can never be left -out. For example, HTML calls the paragraphs simply p, and -because paragraphs never contain paragraphs, a sequence of several paragraphs -can be written as: - -

<p>First paragraph 
-<p>Second paragraph
- -This is not possible in XML; continuing our example above we must always write - -
<paragraph>First paragraph</paragraph>
-<paragraph>Second paragraph</paragraph>
- -The rationale behind that is to (1) simplify the development of XML parsers -(you need not convert the DTD into a deterministic finite automaton which is -required to detect omitted tags), and to (2) make it possible to parse the -document independent of whether the DTD is known or not.

The first line of our sample document, - -

<?xml version="1.0" encoding="ISO-8859-1"?>
- -is the so-called XML declaration. It expresses that the -document follows the conventions of XML version 1.0, and that the document is -encoded using characters from the ISO-8859-1 character set (often known as -"Latin 1", mostly used in Western Europe). Although the XML declaration is not -mandatory, it is good style to include it; everybody sees at the first glance -that the document uses XML markup and not the similar-looking HTML and SGML -markup languages. If you omit the XML declaration, the parser will assume -that the document is encoded as UTF-8 or UTF-16 (there is a rule that makes -it possible to distinguish between UTF-8 and UTF-16 automatically); these -are encodings of Unicode's universal character set. (Note that PXP, unlike its -predecessor "Markup", fully supports Unicode.)

The second line, - -

<!DOCTYPE document SYSTEM "simple.dtd">
- -names the DTD that is going to be used for the rest of the document. In -general, it is possible that the DTD consists of two parts, the so-called -external and the internal subset. "External" means that the DTD exists as a -second file; "internal" means that the DTD is included in the same file. In -this example, there is only an external subset, and the system identifier -"simple.dtd" specifies where the DTD file can be found. System identifiers are -interpreted as URLs; for instance this would be legal: - -
<!DOCTYPE document SYSTEM "http://host/location/simple.dtd">
- -Please note that PXP cannot interpret HTTP identifiers by default, but it is -possible to change the interpretation of system identifiers.

The word immediately following DOCTYPE determines which of -the declared element types (here "document", "section", and "paragraph") is -used for the outermost element, the root element. In this -example it is document because the outermost element is -delimited by <document> and -</document>.

The DTD consists of three declarations for element types: -document, section, and -paragraph. Such a declaration has two parts: - -

<!ELEMENT name content-model>
- -The content model is a regular expression which describes the possible inner -structure of the element. Here, document contains one or -more sections, and a section contains one or more -paragraphs. Note that these two element types are not allowed to contain -arbitrary text. Only the paragraph element type is declared -such that parsed character data (indicated by the symbol -#PCDATA) is permitted.

See below for a detailed discussion of content models.

1.1.2. XML parsers and processors

XML documents are human-readable, but this is not the main purpose of this -language. XML has been designed such that documents can be read by a program -called an XML parser. The parser checks that the document -is well-formatted, and it represents the document as objects of the programming -language. There are two aspects when checking the document: First, the document -must follow some basic syntactic rules, such as that tags are written in angle -brackets, that for every start tag there must be a corresponding end tag and so -on. A document respecting these rules is -well-formed. Second, the document must match the DTD in -which case the document is valid. Many parsers check only -on well-formedness and ignore the DTD; PXP is designed such that it can -even validate the document.

A parser does not make a sensible application, it only reads XML -documents. The whole application working with XML-formatted data is called an -XML processor. Often XML processors convert documents into -another format, such as HTML or Postscript. Sometimes processors extract data -of the documents and output the processed data again XML-formatted. The parser -can help the application processing the document; for example it can provide -means to access the document in a specific manner. PXP supports an -object-oriented access layer specially.

1.1.3. Discussion

As we have seen, there are two levels of description: On the one hand, XML can -define rules about the format of a document (the DTD), on the other hand, XML -expresses structured documents. There are a number of possible applications:

  • XML can be used to express structured texts. Unlike HTML, there is no canonical -interpretation; one would have to write a backend for the DTD that translates -the structured texts into a format that existing browsers, printers -etc. understand. The advantage of a self-defined document format is that it is -possible to design the format in a more problem-oriented way. For example, if -the task is to extract reports from a database, one can use a DTD that reflects -the structure of the report or the database. A possible approach would be to -have an element type for every database table and for every column. Once the -DTD has been designed, the report procedure can be splitted up in a part that -selects the database rows and outputs them as an XML document according to the -DTD, and in a part that translates the document into other formats. Of course, -the latter part can be solved in a generic way, e.g. there may be configurable -backends for all DTDs that follow the approach and have element types for -tables and columns.

    XML plays the role of a configurable intermediate format. The database -extraction function can be written without having to know the details of -typesetting; the backends can be written without having to know the details of -the database.

    Of course, there are traditional solutions. One can define an ad hoc -intermediate text file format. This disadvantage is that there are no names for -the pieces of the format, and that such formats usually lack of documentation -because of this. Another solution would be to have a binary representation, -either as language-dependent or language-independent structure (example of the -latter can be found in RPC implementations). The disadvantage is that it is -harder to view such representations, one has to write pretty printers for this -purpose. It is also more difficult to enter test data; XML is plain text that -can be written using an arbitrary editor (Emacs has even a good XML mode, -PSGML). All these alternatives suffer from a missing structure checker, -i.e. the programs processing these formats usually do not check the input file -or input object in detail; XML parsers check the syntax of the input (the -so-called well-formedness check), and the advanced parsers like PXP even -verify that the structure matches the DTD (the so-called validation).

  • XML can be used as configurable communication language. A fundamental problem -of every communication is that sender and receiver must follow the same -conventions about the language. For data exchange, the question is usually -which data records and fields are available, how they are syntactically -composed, and which values are possible for the various fields. Similar -questions arise for text document exchange. XML does not answer these problems -completely, but it reduces the number of ambiguities for such conventions: The -outlines of the syntax are specified by the DTD (but not necessarily the -details), and XML introduces canonical names for the components of documents -such that it is simpler to describe the rest of the syntax and the semantics -informally.

  • XML is a data storage format. Currently, every software product tends to use -its own way to store data; commercial software often does not describe such -formats, and it is a pain to integrate such software into a bigger project. -XML can help to improve this situation when several applications share the same -syntax of data files. DTDs are then neutral instances that check the format of -data files independent of applications.


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User's guideUpHighlights of XML
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Chapter 2. Using PXP

2.1. Validation

The parser can be used to validate a document. This means -that all the constraints that must hold for a valid document are actually -checked. Validation is the default mode of PXP, i.e. every document is -validated while it is being parsed.

In the examples directory of the distribution you find the -pxpvalidate application. It is invoked in the following way: - -

pxpvalidate [ -wf ] file...
- -The files mentioned on the command line are validated, and every warning and -every error messages are printed to stderr.

The -wf switch modifies the behaviour such that a well-formedness parser is -simulated. In this mode, the ELEMENT, ATTLIST, and NOTATION declarations of the -DTD are ignored, and only the ENTITY declarations will take effect. This mode -is intended for documents lacking a DTD. Please note that the parser still -scans the DTD fully and will report all errors in the DTD; such checks are not -required by a well-formedness parser.

The pxpvalidate application is the simplest sensible program -using PXP, you may consider it as "hello world" program.


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A complete example: The readme DTDUpHow to parse a document from an application
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Chapter 3. The objects representing the document

This description might be out-of-date. See the module interface files -for updated information.

3.1. The document class

class [ 'ext ] document :
-  Pxp_types.collect_warnings -> 
-  object
-    method init_xml_version : string -> unit
-    method init_root : 'ext node -> unit
-
-    method xml_version : string
-    method xml_standalone : bool
-    method dtd : dtd
-    method root : 'ext node
-
-    method encoding : Pxp_types.rep_encoding
-
-    method add_pinstr : proc_instruction -> unit
-    method pinstr : string -> proc_instruction list
-    method pinstr_names : string list
-
-    method write : Pxp_types.output_stream -> Pxp_types.encoding -> unit
-
-  end
-;;
- -The methods beginning with init_ are only for internal use -of the parser.

  • xml_version: returns the version string at the beginning of -the document. For example, "1.0" is returned if the document begins with -<?xml version="1.0"?>.

  • xml_standalone: returns the boolean value of -standalone declaration in the XML declaration. If the -standalone attribute is missing, false is -returned.

  • dtd: returns a reference to the global DTD object.

  • root: returns a reference to the root element.

  • encoding: returns the internal encoding of the -document. This means that all strings of which the document consists are -encoded in this character set.

  • pinstr: returns the processing instructions outside the DTD -and outside the root element. The argument passed to the method names a -target, and the method returns all instructions with this -target. The target is the first word inside <? and -?>.

  • pinstr_names: returns the names of the processing instructions

  • add_pinstr: adds another processing instruction. This method -is used by the parser itself to enter the instructions returned by -pinstr, but you can also enter additional instructions.

  • write: writes the document to the passed stream as XML -text using the passed (external) encoding. The generated text is always valid -XML and can be parsed by PXP; however, the text is badly formatted (this is not -a pretty printer).


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Example: An HTML backend for the readme -DTDUpThe class type node
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The PXP user's guide

Gerd Stolpmann

Copyright © 1999, 2000 by Gerd Stolpmann

PXP is a validating parser for XML-1.0 which has been -written entirely in Objective Caml.

Download PXP:

The free PXP library can be downloaded at -http://www.ocaml-programming.de/packages/. This user's guide is included. -Newest releases of PXP will be announced in -The OCaml Link -Database.

License

This document, and the described software, "PXP", are copyright by -Gerd Stolpmann.

Permission is hereby granted, free of charge, to any person obtaining -a copy of this document and the "PXP" software (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions:

The above copyright notice and this permission notice shall be included -in all copies or substantial portions of the Software.

The Software is provided ``as is'', without warranty of any kind, express -or implied, including but not limited to the warranties of -merchantability, fitness for a particular purpose and noninfringement. -In no event shall Gerd Stolpmann be liable for any claim, damages or -other liability, whether in an action of contract, tort or otherwise, -arising from, out of or in connection with the Software or the use or -other dealings in the software.



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The PXP user's guide
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The PXP user's guide
PrevChapter 1. What is XML?Next

1.2. Highlights of XML

This section explains many of the features of XML, but not all, and some -features not in detail. For a complete description, see the XML -specification.

1.2.1. The DTD and the instance

The DTD contains various declarations; in general you can only use a feature if -you have previously declared it. The document instance file may contain the -full DTD, but it is also possible to split the DTD into an internal and an -external subset. A document must begin as follows if the full DTD is included: - -

<?xml version="1.0" encoding="Your encoding"?>
-<!DOCTYPE root [
-  Declarations
-]>
- -These declarations are called the internal subset. Note -that the usage of entities and conditional sections is restricted within the -internal subset.

If the declarations are located in a different file, you can refer to this file -as follows: - -

<?xml version="1.0" encoding="Your encoding"?>
-<!DOCTYPE root SYSTEM "file name">
- -The declarations in the file are called the external -subset. The file name is called the system -identifier. -It is also possible to refer to the file by a so-called -public identifier, but most XML applications won't use -this feature.

You can also specify both internal and external subsets. In this case, the -declarations of both subsets are mixed, and if there are conflicts, the -declaration of the internal subset overrides those of the external subset with -the same name. This looks as follows: - -

<?xml version="1.0" encoding="Your encoding"?>
-<!DOCTYPE root  SYSTEM "file name" [
-  Declarations
-]>

The XML declaration (the string beginning with <?xml and -ending at ?>) should specify the encoding of the -file. Common values are UTF-8, and the ISO-8859 series of character sets. Note -that every file parsed by the XML processor can begin with an XML declaration -and that every file may have its own encoding.

The name of the root element must be mentioned directly after the -DOCTYPE string. This means that a full document instance -looks like - -

<?xml version="1.0" encoding="Your encoding"?>
-<!DOCTYPE root  SYSTEM "file name" [
-  Declarations
-]>
-
-<root>
-  inner contents
-</root>

1.2.2. Reserved characters

Some characters are generally reserved to indicate markup such that they cannot -be used for character data. These characters are <, >, and -&. Furthermore, single and double quotes are sometimes reserved. If you -want to include such a character as character, write it as follows: - -

  • &lt; instead of <

  • &gt; instead of >

  • &amp; instead of &

  • &apos; instead of '

  • &quot; instead of "

- -All other characters are free in the document instance. It is possible to -include a character by its position in the Unicode alphabet: - -
&#n;
- -where n is the decimal number of the -character. Alternatively, you can specify the character by its hexadecimal -number: - -
&#xn;
- -In the scope of declarations, the character % is no longer free. To include it -as character, you must use the notations &#37; or -&#x25;.

Note that besides &lt;, &gt;, &amp;, -&apos;, and &quot; there are no predefines character entities. This is -different from HTML which defines a list of characters that can be referenced -by name (e.g. &auml; for ä); however, if you prefer named characters, you -can declare such entities yourself (see below).

1.2.3. Elements and ELEMENT declarations

Elements structure the document instance in a hierarchical way. There is a -top-level element, the root element, which contains a -sequence of inner elements and character sections. The inner elements are -structured in the same way. Every element has an element -type. The beginning of the element is indicated by a start -tag, written - -

<element-type>
- -and the element continues until the corresponding end tag -is reached: - -
</element-type>
- -In XML, it is not allowed to omit start or end tags, even if the DTD would -permit this. Note that there are no special rules how to interpret spaces or -newlines near start or end tags; all spaces and newlines count.

Every element type must be declared before it can be used. The declaration -consists of two parts: the ELEMENT declaration describes the content model, -i.e. which inner elements are allowed; the ATTLIST declaration describes the -attributes of the element.

An element can simply allow everything as content. This is written: - -

<!ELEMENT name ANY>
- -On the opposite, an element can be forced to be empty; declared by: - -
<!ELEMENT name EMPTY>
- -Note that there is an abbreviated notation for empty element instances: -<name/>.

There are two more sophisticated forms of declarations: so-called -mixed declarations, and regular -expressions. An element with mixed content contains character data -interspersed with inner elements, and the set of allowed inner elements can be -specified. In contrast to this, a regular expression declaration does not allow -character data, but the inner elements can be described by the more powerful -means of regular expressions.

A declaration for mixed content looks as follows: - -

<!ELEMENT name (#PCDATA | element1 | ... | elementn )*>
- -or if you do not want to allow any inner element, simply - -
<!ELEMENT name (#PCDATA)>

Example

If element type q is declared as - -

<!ELEMENT q (#PCDATA | r | s)*>
- -this is a legal instance: - -
<q>This is character data<r></r>with <s></s>inner elements</q>
- -But this is illegal because t has not been enumerated in the -declaration: - -
<q>This is character data<r></r>with <t></t>inner elements</q>

The other form uses a regular expression to describe the possible contents: - -

<!ELEMENT name regexp>
- -The following well-known regexp operators are allowed: - -

  • element-name

  • (subexpr1 , ... , subexprn )

  • (subexpr1 | ... | subexprn )

  • subexpr*

  • subexpr+

  • subexpr?

- -The , operator indicates a sequence of sub-models, the -| operator describes alternative sub-models. The -* indicates zero or more repetitions, and -+ one or more repetitions. Finally, ? can -be used for optional sub-models. As atoms the regexp can contain names of -elements; note that it is not allowed to include #PCDATA.

The exact syntax of the regular expressions is rather strange. This can be -explained best by a list of constraints: - -

  • The outermost expression must not be -element-name.

    Illegal: -<!ELEMENT x y>; this must be written as -<!ELEMENT x (y)>.

  • For the unary operators subexpr*, -subexpr+, and -subexpr?, the -subexpr must not be again an -unary operator.

    Illegal: -<!ELEMENT x y**>; this must be written as -<!ELEMENT x (y*)*>.

  • Between ) and one of the unary operatory -*, +, or ?, there must -not be whitespace.

    Illegal: -<!ELEMENT x (y|z) *>; this must be written as -<!ELEMENT x (y|z)*>.

  • There is the additional constraint that the -right parenthsis must be contained in the same entity as the left parenthesis; -see the section about parsed entities below.

Note that there is another restriction on regular expressions which must be -deterministic. This means that the parser must be able to see by looking at the -next token which alternative is actually used, or whether the repetition -stops. The reason for this is simply compatability with SGML (there is no -intrinsic reason for this rule; XML can live without this restriction).

Example

The elements are declared as follows: - -

<!ELEMENT q (r?, (s | t)+)>
-<!ELEMENT r (#PCDATA)>
-<!ELEMENT s EMPTY>
-<!ELEMENT t (q | r)>
- -This is a legal instance: - -
<q><r>Some characters</r><s/></q>
- -(Note: <s/> is an abbreviation for -<s></s>.) - -It would be illegal to leave <s/> out because at -least one instance of s or t must be -present. It would be illegal, too, if characters existed outside the -r element; the only exception is white space. -- This is -legal, too: - -
<q><s/><t><q><s/></q></t></q>

1.2.4. Attribute lists and ATTLIST declarations

Elements may have attributes. These are put into the start tag of an element as -follows: - -

<element-name attribute1="value1" ... attributen="valuen">
- -Instead of -"valuek" -it is also possible to use single quotes as in -'valuek'. -Note that you cannot use double quotes literally within the value of the -attribute if double quotes are the delimiters; the same applies to single -quotes. You can generally not use < and & as characters in attribute -values. It is possible to include the paraphrases &lt;, &gt;, -&amp;, &apos;, and &quot; (and any other reference to a general -entity as long as the entity is not defined by an external file) as well as -&#n;.

Before you can use an attribute you must declare it. An ATTLIST declaration -looks as follows: - -

<!ATTLIST element-name 
-          attribute-name attribute-type attribute-default
-          ...
-          attribute-name attribute-type attribute-default
->
- -There are a lot of types, but most important are: - -

  • CDATA: Every string is allowed as attribute value.

  • NMTOKEN: Every nametoken is allowed as attribute -value. Nametokens consist (mainly) of letters, digits, ., :, -, _ in arbitrary -order.

  • NMTOKENS: A space-separated list of nametokens is allowed as -attribute value.

- -The most interesting default declarations are: - -

  • #REQUIRED: The attribute must be specified.

  • #IMPLIED: The attribute can be specified but also can be -left out. The application can find out whether the attribute was present or -not.

  • "value" or -'value': This particular value is -used as default if the attribute is omitted in the element.

Example

This is a valid attribute declaration for element type r: - -

<!ATTLIST r 
-          x CDATA    #REQUIRED
-          y NMTOKEN  #IMPLIED
-          z NMTOKENS "one two three">
- -This means that x is a required attribute that cannot be -left out, while y and z are optional. The -XML parser indicates the application whether y is present or -not, but if z is missing the default value -"one two three" is returned automatically.

This is a valid example of these attributes: - -

<r x="He said: &quot;I don't like quotes!&quot;" y='1'>

1.2.5. Parsed entities

Elements describe the logical structure of the document, while -entities determine the physical structure. Entities are -the pieces of text the parser operates on, mostly files and macros. Entities -may be parsed in which case the parser reads the text and -interprets it as XML markup, or unparsed which simply -means that the data of the entity has a foreign format (e.g. a GIF icon).

If the parsed entity is going to be used as part of the DTD, it -is called a parameter entity. You can declare a parameter -entity with a fixed text as content by: - -

<!ENTITY % name "value">
- -Within the DTD, you can refer to this entity, i.e. read -the text of the entity, by: - -
%name;
- -Such entities behave like macros, i.e. when they are referred to, the -macro text is inserted and read instead of the original text. - -

Example

For example, you can declare two elements with the same content model by: - -

<!ENTITY % model "a | b | c">
-<!ELEMENT x (%model;)>
-<!ELEMENT y (%model;)>

- -If the contents of the entity are given as string constant, the entity is -called an internal entity. It is also possible to name a -file to be used as content (an external entity): - -
<!ENTITY % name SYSTEM "file name">
- -There are some restrictions for parameter entities: - -

  • If the internal parameter entity contains the first token of a declaration -(i.e. <!), it must also contain the last token of the -declaration, i.e. the >. This means that the entity -either contains a whole number of complete declarations, or some text from the -middle of one declaration.

    Illegal: -

    <!ENTITY % e "(a | b | c)>">
    -<!ELEMENT x %e;
    Because <! is contained in the main -entity, and the corresponding > is contained in the -entity e.

  • If the internal parameter entity contains a left paranthesis, it must also -contain the corresponding right paranthesis.

    Illegal: -

    <!ENTITY % e "(a | b | c">
    -<!ELEMENT x %e;)>
    Because ( is contained in the entity -e, and the corresponding ) is -contained in the main entity.

  • When reading text from an entity, the parser automatically inserts one space -character before the entity text and one space character after the entity -text. However, this rule is not applied within the definition of another -entity.

    Legal: -

     
    -<!ENTITY % suffix "gif"> 
    -<!ENTITY iconfile 'icon.%suffix;'>
    Because %suffix; is referenced within -the definition text for iconfile, no additional spaces are -added.

    Illegal: -

    <!ENTITY % suffix "test">
    -<!ELEMENT x.%suffix; ANY>
    -Because %suffix; is referenced outside the definition -text of another entity, the parser replaces %suffix; by -spacetestspace.

    Illegal: -

    <!ENTITY % e "(a | b | c)">
    -<!ELEMENT x %e;*>
    Because there is a whitespace between ) -and *, which is illegal.

  • An external parameter entity must always consist of a whole number of complete -declarations.

  • In the internal subset of the DTD, a reference to a parameter entity (internal -or external) is only allowed at positions where a new declaration can start.

If the parsed entity is going to be used in the document instance, it is called -a general entity. Such entities can be used as -abbreviations for frequent phrases, or to include external files. Internal -general entities are declared as follows: - -

<!ENTITY name "value">
- -External general entities are declared this way: - -
<!ENTITY name SYSTEM "file name">
- -References to general entities are written as: - -
&name;
- -The main difference between parameter and general entities is that the former -are only recognized in the DTD and that the latter are only recognized in the -document instance. As the DTD is parsed before the document, the parameter -entities are expanded first; for example it is possible to use the content of a -parameter entity as the name of a general entity: -&#38;%name;;[1].

General entities must respect the element hierarchy. This means that there must -be an end tag for every start tag in the entity value, and that end tags -without corresponding start tags are not allowed.

Example

If the author of a document changes sometimes, it is worthwhile to set up a -general entity containing the names of the authors. If the author changes, you -need only to change the definition of the entity, and do not need to check all -occurrences of authors' names: - -

<!ENTITY authors "Gerd Stolpmann">
- -In the document text, you can now refer to the author names by writing -&authors;.

Illegal: -The following two entities are illegal because the elements in the definition -do not nest properly: - -

<!ENTITY lengthy-tag "<section textcolor='white' background='graphic'>">
-<!ENTITY nonsense    "<a></b>">

Earlier in this introduction we explained that there are substitutes for -reserved characters: &lt;, &gt;, &amp;, &apos;, and -&quot;. These are simply predefined general entities; note that they are -the only predefined entities. It is allowed to define these entities again -as long as the meaning is unchanged.

1.2.6. Notations and unparsed entities

Unparsed entities have a foreign format and can thus not be read by the XML -parser. Unparsed entities are always external. The format of an unparsed entity -must have been declared, such a format is called a -notation. The entity can then be declared by referring to -this notation. As unparsed entities do not contain XML text, it is not possible -to include them directly into the document; you can only declare attributes -such that names of unparsed entities are acceptable values.

As you can see, unparsed entities are too complicated in order to have any -purpose. It is almost always better to simply pass the name of the data file as -normal attribute value, and let the application recognize and process the -foreign format.

Notes

[1]

This construct is only -allowed within the definition of another entity; otherwise extra spaces would -be added (as explained above). Such indirection is not recommended.

Complete example: -

<!ENTITY % variant "a">      <!-- or "b" -->
-<!ENTITY text-a "This is text A.">
-<!ENTITY text-b "This is text B.">
-<!ENTITY text "&#38;text-%variant;;">
-You can now write &text; in the document instance, and -depending on the value of variant either -text-a or text-b is inserted.


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What is XML?UpA complete example: The readme DTD
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The PXP user's guide
PrevChapter 3. The objects representing the documentNext

3.3. The class type extension

class type [ 'node ] extension =
-  object ('self)
-    method clone : 'self
-      (* "clone" should return an exact deep copy of the object. *)
-    method node : 'node
-      (* "node" returns the corresponding node of this extension. This method
-       * intended to return exactly what previously has been set by "set_node".
-       *)
-    method set_node : 'node -> unit
-      (* "set_node" is invoked once the extension is associated to a new
-       * node object.
-       *)
-  end
- -This is the type of classes used for node extensions. For every node of the -document tree, there is not only the node object, but also -an extension object. The latter has minimal -functionality; it has only the necessary methods to be attached to the node -object containing the details of the node instance. The extension object is -called extension because its purpose is extensibility.

For some reasons, it is impossible to derive the -node classes (i.e. element_impl and -data_impl) such that the subclasses can be extended by new -new methods. But -subclassing nodes is a great feature, because it allows the user to provide -different classes for different types of nodes. The extension objects are a -workaround that is as powerful as direct subclassing, the costs are -some notation overhead.

Figure 3-6. The structure of nodes and extensions

The picture shows how the nodes and extensions are linked -together. Every node has a reference to its extension, and every extension has -a reference to its node. The methods extension and -node follow these references; a typical phrase is - -

self # node # attribute "xy"
- -to get the value of an attribute from a method defined in the extension object; -or - -
self # node # iter
-  (fun n -> n # extension # my_method ...)
- -to iterate over the subnodes and to call my_method of the -corresponding extension objects.

Note that extension objects do not have references to subnodes -(or "subextensions") themselves; in order to get one of the children of an -extension you must first go to the node object, then get the child node, and -finally reach the extension that is logically the child of the extension you -started with.

3.3.1. How to define an extension class

At minimum, you must define the methods -clone, node, and -set_node such that your class is compatible with the type -extension. The method set_node is called -during the initialization of the node, or after a node has been cloned; the -node object invokes set_node on the extension object to tell -it that this node is now the object the extension is linked to. The extension -must return the node object passed as argument of set_node -when the node method is called.

The clone method must return a copy of the -extension object; at least the object itself must be duplicated, but if -required, the copy should deeply duplicate all objects and values that are -referred by the extension, too. Whether this is required, depends on the -application; clone is invoked by the node object when one of -its cloning methods is called.

A good starting point for an extension class: - -

class custom_extension =
-  object (self)
-
-    val mutable node = (None : custom_extension node option)
-
-    method clone = {< >} 
-
-    method node =
-      match node with
-          None ->
-            assert false
-        | Some n -> n
-
-    method set_node n =
-      node <- Some n
-
-  end
- -This class is compatible with extension. The purpose of -defining such a class is, of course, adding further methods; and you can do it -without restriction.

Often, you want not only one extension class. In this case, -it is the simplest way that all your classes (for one kind of document) have -the same type (with respect to the interface; i.e. it does not matter if your -classes differ in the defined private methods and instance variables, but -public methods count). This approach avoids lots of coercions and problems with -type incompatibilities. It is simple to implement: - -

class custom_extension =
-  object (self)
-    val mutable node = (None : custom_extension node option)
-
-    method clone = ...      (* see above *)
-    method node = ...       (* see above *)
-    method set_node n = ... (* see above *)
-
-    method virtual my_method1 : ...
-    method virtual my_method2 : ...
-    ... (* etc. *)
-  end
-
-class custom_extension_kind_A =
-  object (self)
-    inherit custom_extension
-
-    method my_method1 = ...
-    method my_method2 = ...
-  end
-
-class custom_extension_kind_B =
-  object (self)
-    inherit custom_extension
-
-    method my_method1 = ...
-    method my_method2 = ...
-  end
- -If a class does not need a method (e.g. because it does not make sense, or it -would violate some important condition), it is possible to define the method -and to always raise an exception when the method is invoked -(e.g. assert false).

The latter is a strong recommendation: do not try to further -specialize the types of extension objects. It is difficult, sometimes even -impossible, and almost never worth-while.

3.3.2. How to bind extension classes to element types

Once you have defined your extension classes, you can bind them -to element types. The simplest case is that you have only one class and that -this class is to be always used. The parsing functions in the module -Pxp_yacc take a spec argument which -can be customized. If your single class has the name c, -this argument should be - -

let spec =
-  make_spec_from_alist
-    ~data_exemplar:            (new data_impl c)
-    ~default_element_exemplar: (new element_impl c)
-    ~element_alist:            []
-    ()
- -This means that data nodes will be created from the exemplar passed by -~data_exemplar and that all element nodes will be made from the exemplar -specified by ~default_element_exemplar. In ~element_alist, you can -pass that different exemplars are to be used for different element types; but -this is an optional feature. If you do not need it, pass the empty list.

Remember that an exemplar is a (node, extension) pair that serves as pattern -when new nodes (and the corresponding extension objects) are added to the -document tree. In this case, the exemplar contains c as -extension, and when nodes are created, the exemplar is cloned, and cloning -makes also a copy of c such that all nodes of the document -tree will have a copy of c as extension.

The ~element_alist argument can bind -specific element types to specific exemplars; as exemplars may be instances of -different classes it is effectively possible to bind element types to -classes. For example, if the element type "p" is implemented by class "c_p", -and "q" is realized by "c_q", you can pass the following value: - -

let spec =
-  make_spec_from_alist
-    ~data_exemplar:            (new data_impl c)
-    ~default_element_exemplar: (new element_impl c)
-    ~element_alist:            
-      [ "p", new element_impl c_p;
-        "q", new element_impl c_q;
-      ]
-    ()
- -The extension object c is still used for all data nodes and -for all other element types.


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3.4. Details of the mapping from XML text to the tree representation

3.4.1. The representation of character-free elements

If an element declaration does not allow the element to -contain character data, the following rules apply.

If the element must be empty, i.e. it is declared with the -keyword EMPTY, the element instance must be effectively -empty (it must not even contain whitespace characters). The parser guarantees -that a declared EMPTY element does never contain a data -node, even if the data node represents the empty string.

If the element declaration only permits other elements to occur -within that element but not character data, it is still possible to insert -whitespace characters between the subelements. The parser ignores these -characters, too, and does not create data nodes for them.

Example. Consider the following element types: - -

<!ELEMENT x ( #PCDATA | z )* >
-<!ELEMENT y ( z )* >
-<!ELEMENT z EMPTY>
- -Only x may contain character data, the keyword -#PCDATA indicates this. The other types are character-free.

The XML term - -

<x><z/> <z/></x>
- -will be internally represented by an element node for x -with three subnodes: the first z element, a data node -containing the space character, and the second z element. -In contrast to this, the term - -
<y><z/> <z/></y>
- -is represented by an element node for y with only -two subnodes, the two z elements. There -is no data node for the space character because spaces are ignored in the -character-free element y.

3.4.2. The representation of character data

The XML specification allows all Unicode characters in XML -texts. This parser can be configured such that UTF-8 is used to represent the -characters internally; however, the default character encoding is -ISO-8859-1. (Currently, no other encodings are possible for the internal string -representation; the type Pxp_types.rep_encoding enumerates -the possible encodings. Principially, the parser could use any encoding that is -ASCII-compatible, but there are currently only lexical analyzers for UTF-8 and -ISO-8859-1. It is currently impossible to use UTF-16 or UCS-4 as internal -encodings (or other multibyte encodings which are not ASCII-compatible) unless -major parts of the parser are rewritten - unlikely...)

The internal encoding may be different from the external encoding (specified -in the XML declaration <?xml ... encoding="..."?>); in -this case the strings are automatically converted to the internal encoding.

If the internal encoding is ISO-8859-1, it is possible that there are -characters that cannot be represented. In this case, the parser ignores such -characters and prints a warning (to the collect_warning -object that must be passed when the parser is called).

The XML specification allows lines to be separated by single LF -characters, by CR LF character sequences, or by single CR -characters. Internally, these separators are always converted to single LF -characters.

The parser guarantees that there are never two adjacent data -nodes; if necessary, data material that would otherwise be represented by -several nodes is collapsed into one node. Note that you can still create node -trees with adjacent data nodes; however, the parser does not return such trees.

Note that CDATA sections are not represented specially; such -sections are added to the current data material that being collected for the -next data node.

3.4.3. The representation of entities within documents

Entities are not represented within -documents! If the parser finds an entity reference in the document -content, the reference is immediately expanded, and the parser reads the -expansion text instead of the reference.

3.4.4. The representation of attributes

As attribute -values are composed of Unicode characters, too, the same problems with the -character encoding arise as for character material. Attribute values are -converted to the internal encoding, too; and if there are characters that -cannot be represented, these are dropped, and a warning is printed.

Attribute values are normalized before they are returned by -methods like attribute. First, any remaining entity -references are expanded; if necessary, expansion is performed recursively. -Second, newline characters (any of LF, CR LF, or CR characters) are converted -to single space characters. Note that especially the latter action is -prescribed by the XML standard (but is not converted -such that it is still possible to include line feeds into attributes).

3.4.5. The representation of processing instructions

Processing instructions are parsed to some extent: The first word of the -PI is called the target, and it is stored separated from the rest of the PI: - -

<?target rest?>
- -The exact location where a PI occurs is not represented (by default). The -parser puts the PI into the object that represents the embracing construct (an -element, a DTD, or the whole document); that means you can find out which PIs -occur in a certain element, in the DTD, or in the whole document, but you -cannot lookup the exact position within the construct.

If you require the exact location of PIs, it is possible to -create extra nodes for them. This mode is controled by the option -enable_pinstr_nodes. The additional nodes have the node type -T_pinstr target, and are created -from special exemplars contained in the spec (see -pxp_document.mli).

3.4.6. The representation of comments

Normally, comments are not represented; they are dropped by -default. However, if you require them, it is possible to create -T_comment nodes for them. This mode can be specified by the -option enable_comment_nodes. Comment nodes are created from -special exemplars contained in the spec (see -pxp_document.mli). You can access the contents of comments through the -method comment.

3.4.7. The attributes xml:lang and -xml:space

These attributes are not supported specially; they are handled -like any other attribute.

3.4.8. And what about namespaces?

Currently, there is no special support for namespaces. -However, the parser allows it that the colon occurs in names such that it is -possible to implement namespaces on top of the current API.

Some future release of PXP will support namespaces as built-in -feature...


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4.2. Resolvers and sources

4.2.1. Using the built-in resolvers (called sources)

The type source enumerates the two -possibilities where the document to parse comes from. - -

type source =
-    Entity of ((dtd -> Pxp_entity.entity) * Pxp_reader.resolver)
-  | ExtID of (ext_id * Pxp_reader.resolver)
- -You normally need not to worry about this type as there are convenience -functions that create source values: - - -

  • from_file s: The document is read from -file s; you may specify absolute or relative path names. -The file name must be encoded as UTF-8 string.

    There is an optional argument ~system_encoding -specifying the character encoding which is used for the names of the file -system. For example, if this encoding is ISO-8859-1 and s is -also a ISO-8859-1 string, you can form the source: - -

    let s_utf8  =  recode_string ~in_enc:`Enc_iso88591 ~out_enc:`Enc_utf8 s in
    -from_file ~system_encoding:`Enc_iso88591 s_utf8

    This source has the advantage that -it is able to resolve inner external entities; i.e. if your document includes -data from another file (using the SYSTEM attribute), this -mode will find that file. However, this mode cannot resolve -PUBLIC identifiers nor SYSTEM identifiers -other than "file:".

  • from_channel ch: The document is read -from the channel ch. In general, this source also supports -file URLs found in the document; however, by default only absolute URLs are -understood. It is possible to associate an ID with the channel such that the -resolver knows how to interpret relative URLs: - -

    from_channel ~id:(System "file:///dir/dir1/") ch
    - -There is also the ~system_encoding argument specifying how file names are -encoded. - The example from above can also be written (but it is no -longer possible to interpret relative URLs because there is no ~id argument, -and computing this argument is relatively complicated because it must -be a valid URL): - -
    let ch = open_in s in
    -let src = from_channel ~system_encoding:`Enc_iso88591 ch in
    -...;
    -close_in ch

  • from_string s: The string -s is the document to parse. This mode is not able to -interpret file names of SYSTEM clauses, nor it can look up -PUBLIC identifiers.

    Normally, the encoding of the string is detected as usual -by analyzing the XML declaration, if any. However, it is also possible to -specify the encoding directly: - -

    let src = from_string ~fixenc:`ISO-8859-2 s

  • ExtID (id, r): The document to parse -is denoted by the identifier id (either a -SYSTEM or PUBLIC clause), and this -identifier is interpreted by the resolver r. Use this mode -if you have written your own resolver.

    Which character sets are possible depends on the passed -resolver r.

  • Entity (get_entity, r): The document -to parse is returned by the function invocation get_entity -dtd, where dtd is the DTD object to use (it may be -empty). Inner external references occuring in this entity are resolved using -the resolver r.

    Which character sets are possible depends on the passed -resolver r.

4.2.2. The resolver API

A resolver is an object that can be opened like a file, but you -do not pass the file name to the resolver, but the XML identifier of the entity -to read from (either a SYSTEM or PUBLIC -clause). When opened, the resolver must return the -Lexing.lexbuf that reads the characters. The resolver can -be closed, and it can be cloned. Furthermore, it is possible to tell the -resolver which character set it should assume. - The following from Pxp_reader: - -

exception Not_competent
-exception Not_resolvable of exn
-
-class type resolver =
-  object
-    method init_rep_encoding : rep_encoding -> unit
-    method init_warner : collect_warnings -> unit
-    method rep_encoding : rep_encoding
-    method open_in : ext_id -> Lexing.lexbuf
-    method close_in : unit
-    method change_encoding : string -> unit
-    method clone : resolver
-    method close_all : unit
-  end
- -The resolver object must work as follows:

  • When the parser is called, it tells the resolver the -warner object and the internal encoding by invoking -init_warner and init_rep_encoding. The -resolver should store these values. The method rep_encoding -should return the internal encoding.

  • If the parser wants to read from the resolver, it invokes -the method open_in. Either the resolver succeeds, in which -case the Lexing.lexbuf reading from the file or stream must -be returned, or opening fails. In the latter case the method implementation -should raise an exception (see below).

  • If the parser finishes reading, it calls the -close_in method.

  • If the parser finds a reference to another external -entity in the input stream, it calls clone to get a second -resolver which must be initially closed (not yet connected with an input -stream). The parser then invokes open_in and the other -methods as described.

  • If you already know the character set of the input -stream, you should recode it to the internal encoding, and define the method -change_encoding as an empty method.

  • If you want to support multiple external character sets, -the object must follow a much more complicated protocol. Directly after -open_in has been called, the resolver must return a lexical -buffer that only reads one byte at a time. This is only possible if you create -the lexical buffer with Lexing.from_function; the function -must then always return 1 if the EOF is not yet reached, and 0 if EOF is -reached. If the parser has read the first line of the document, it will invoke -change_encoding to tell the resolver which character set to -assume. From this moment, the object can return more than one byte at once. The -argument of change_encoding is either the parameter of the -"encoding" attribute of the XML declaration, or the empty string if there is -not any XML declaration or if the declaration does not contain an encoding -attribute.

    At the beginning the resolver must only return one -character every time something is read from the lexical buffer. The reason for -this is that you otherwise would not exactly know at which position in the -input stream the character set changes.

    If you want automatic recognition of the character set, -it is up to the resolver object to implement this.

  • If an error occurs, the parser calls the method -close_all for the top-level resolver; this method should -close itself (if not already done) and all clones.

Exceptions. It is possible to chain resolvers such that when the first resolver is not able -to open the entity, the other resolvers of the chain are tried in turn. The -method open_in should raise the exception -Not_competent to indicate that the next resolver should try -to open the entity. If the resolver is able to handle the ID, but some other -error occurs, the exception Not_resolvable should be raised -to force that the chain breaks. -

Example: How to define a resolver that is equivalent to -from_string: ...

4.2.3. Predefined resolver components

There are some classes in Pxp_reader that define common resolver behaviour. - -

class resolve_read_this_channel : 
-    ?id:ext_id -> 
-    ?fixenc:encoding -> 
-    ?auto_close:bool -> 
-    in_channel -> 
-        resolver
- -Reads from the passed channel (it may be even a pipe). If the -~id argument is passed to the object, the created resolver -accepts only this ID. Otherwise all IDs are accepted. - Once the resolver has -been cloned, it does not accept any ID. This means that this resolver cannot -handle inner references to external entities. Note that you can combine this -resolver with another resolver that can handle inner references (such as -resolve_as_file); see class 'combine' below. - If you pass the -~fixenc argument, the encoding of the channel is set to the -passed value, regardless of any auto-recognition or any XML declaration. - If -~auto_close = true (which is the default), the channel is -closed after use. If ~auto_close = false, the channel is -left open. -

class resolve_read_any_channel : 
-    ?auto_close:bool -> 
-    channel_of_id:(ext_id -> (in_channel * encoding option)) -> 
-        resolver
- -This resolver calls the function ~channel_of_id to open a -new channel for the passed ext_id. This function must either -return the channel and the encoding, or it must fail with Not_competent. The -function must return None as encoding if the default -mechanism to recognize the encoding should be used. It must return -Some e if it is already known that the encoding of the -channel is e. If ~auto_close = true -(which is the default), the channel is closed after use. If -~auto_close = false, the channel is left open.

class resolve_read_url_channel :
-    ?base_url:Neturl.url ->
-    ?auto_close:bool -> 
-    url_of_id:(ext_id -> Neturl.url) -> 
-    channel_of_url:(Neturl.url -> (in_channel * encoding option)) -> 
-        resolver
- -When this resolver gets an ID to read from, it calls the function -~url_of_id to get the corresponding URL. This URL may be a -relative URL; however, a URL scheme must be used which contains a path. The -resolver converts the URL to an absolute URL if necessary. The second -function, ~channel_of_url, is fed with the absolute URL as -input. This function opens the resource to read from, and returns the channel -and the encoding of the resource.

Both functions, ~url_of_id and -~channel_of_url, can raise Not_competent to indicate that -the object is not able to read from the specified resource. However, there is a -difference: A Not_competent from ~url_of_id is left as it -is, but a Not_competent from ~channel_of_url is converted to -Not_resolvable. So only ~url_of_id decides which URLs are -accepted by the resolver and which not.

The function ~channel_of_url must return -None as encoding if the default mechanism to recognize the -encoding should be used. It must return Some e if it is -already known that the encoding of the channel is e.

If ~auto_close = true (which is the default), the channel is -closed after use. If ~auto_close = false, the channel is -left open.

Objects of this class contain a base URL relative to which relative URLs are -interpreted. When creating a new object, you can specify the base URL by -passing it as ~base_url argument. When an existing object is -cloned, the base URL of the clone is the URL of the original object. - Note -that the term "base URL" has a strict definition in RFC 1808.

class resolve_read_this_string : 
-    ?id:ext_id -> 
-    ?fixenc:encoding -> 
-    string -> 
-        resolver
- -Reads from the passed string. If the ~id argument is passed -to the object, the created resolver accepts only this ID. Otherwise all IDs are -accepted. - Once the resolver has been cloned, it does not accept any ID. This -means that this resolver cannot handle inner references to external -entities. Note that you can combine this resolver with another resolver that -can handle inner references (such as resolve_as_file); see class 'combine' -below. - If you pass the ~fixenc argument, the encoding of -the string is set to the passed value, regardless of any auto-recognition or -any XML declaration.

class resolve_read_any_string : 
-    string_of_id:(ext_id -> (string * encoding option)) -> 
-        resolver
- -This resolver calls the function ~string_of_id to get the -string for the passed ext_id. This function must either -return the string and the encoding, or it must fail with Not_competent. The -function must return None as encoding if the default -mechanism to recognize the encoding should be used. It must return -Some e if it is already known that the encoding of the -string is e.

class resolve_as_file :
-    ?file_prefix:[ `Not_recognized | `Allowed | `Required ] ->
-    ?host_prefix:[ `Not_recognized | `Allowed | `Required ] ->
-    ?system_encoding:encoding ->
-    ?url_of_id:(ext_id -> Neturl.url) -> 
-    ?channel_of_url: (Neturl.url -> (in_channel * encoding option)) ->
-    unit -> 
-        resolver
-Reads from the local file system. Every file name is interpreted as -file name of the local file system, and the referred file is read.

The full form of a file URL is: file://host/path, where -'host' specifies the host system where the file identified 'path' -resides. host = "" or host = "localhost" are accepted; other values -will raise Not_competent. The standard for file URLs is -defined in RFC 1738.

Option ~file_prefix: Specifies how the "file:" prefix of -file names is handled: -

  • `Not_recognized:The prefix is not -recognized.

  • `Allowed: The prefix is allowed but -not required (the default).

  • `Required: The prefix is -required.

Option ~host_prefix: Specifies how the "//host" phrase of -file names is handled: -

  • `Not_recognized:The prefix is not -recognized.

  • `Allowed: The prefix is allowed but -not required (the default).

  • `Required: The prefix is -required.

Option ~system_encoding: Specifies the encoding of file -names of the local file system. Default: UTF-8.

Options ~url_of_id, ~channel_of_url: Not -for the casual user!

class combine : 
-    ?prefer:resolver -> 
-    resolver list -> 
-        resolver
- -Combines several resolver objects. If a concrete entity with an -ext_id is to be opened, the combined resolver tries the -contained resolvers in turn until a resolver accepts opening the entity -(i.e. it does not raise Not_competent on open_in).

Clones: If the 'clone' method is invoked before 'open_in', all contained -resolvers are cloned separately and again combined. If the 'clone' method is -invoked after 'open_in' (i.e. while the resolver is open), additionally the -clone of the active resolver is flagged as being preferred, i.e. it is tried -first.


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Configuring and calling the parserUpThe DTD classes
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4.3. The DTD classes

Sorry, not yet -written. Perhaps the interface definition of Pxp_dtd expresses the same:


(**********************************************************************)
-(*                                                                    *)
-(* Pxp_dtd:                                                           *)
-(*     Object model of document type declarations                     *)
-(*                                                                    *)
-(**********************************************************************)
-
-(* ======================================================================
- * OVERVIEW
- *
- * class dtd ............... represents the whole DTD, including element
- *                           declarations, entity declarations, notation
- *                           declarations, and processing instructions
- * class dtd_element ....... represents an element declaration consisting
- *                           of a content model and an attribute list
- *                           declaration
- * class dtd_notation ...... represents a notation declaration
- * class proc_instruction .. represents a processing instruction
- * ======================================================================
- *
- *)
-
-
-class dtd :
-  (* Creation:
-   *   new dtd
-   * creates a new, empty DTD object without any declaration, without a root
-   * element, without an ID.
-   *)
-  Pxp_types.collect_warnings -> 
-  Pxp_types.rep_encoding ->
-  object
-    method root : string option
-      (* get the name of the root element if present *)
-
-    method set_root : string -> unit
-      (* set the name of the root element. This method can be invoked 
-       * only once
-       *)
-
-    method id : Pxp_types.dtd_id option
-      (* get the identifier for this DTD *)
-
-    method set_id : Pxp_types.dtd_id -> unit
-      (* set the identifier. This method can be invoked only once *)
-
-    method encoding : Pxp_types.rep_encoding
-      (* returns the encoding used for character representation *)
-
-
-    method allow_arbitrary : unit
-      (* After this method has been invoked, the object changes its behaviour:
-       * - elements and notations that have not been added may be used in an
-       *   arbitrary way; the methods "element" and "notation" indicate this
-       *   by raising Undeclared instead of Validation_error.
-       *)
-
-    method disallow_arbitrary : unit
-
-    method arbitrary_allowed : bool
-      (* Returns whether arbitrary contents are allowed or not. *)
-
-    method standalone_declaration : bool
-      (* Whether there is a 'standalone' declaration or not. Strictly 
-       * speaking, this declaration is not part of the DTD, but it is
-       * included here because of practical reasons. 
-       * If not set, this property defaults to 'false'.
-       *)
-
-    method set_standalone_declaration : bool -> unit
-      (* Sets the 'standalone' declaration. *)
-
-
-    method add_element : dtd_element -> unit
-      (* add the given element declaration to this DTD. Raises Not_found
-       * if there is already an element declaration with the same name.
-       *)
-
-    method add_gen_entity : Pxp_entity.entity -> bool -> unit
-      (* add_gen_entity e extdecl:
-       * add the entity 'e' as general entity to this DTD (general entities
-       * are those represented by &name;). If there is already a declaration
-       * with the same name, the second definition is ignored; as exception from
-       * this rule, entities with names "lt", "gt", "amp", "quot", and "apos"
-       * may only be redeclared with a definition that is equivalent to the
-       * standard definition; otherwise a Validation_error is raised.
-       *
-       * 'extdecl': 'true' indicates that the entity declaration occurs in
-       * an external entity. (Used for the standalone check.)
-       *)
-
-    method add_par_entity : Pxp_entity.entity -> unit
-      (* add the given entity as parameter entity to this DTD (parameter
-       * entities are those represented by %name;). If there is already a 
-       * declaration with the same name, the second definition is ignored.
-       *)
-
-    method add_notation : dtd_notation -> unit
-      (* add the given notation to this DTD. If there is already a declaration
-       * with the same name, a Validation_error is raised.
-       *)
-
-    method add_pinstr : proc_instruction -> unit
-      (* add the given processing instruction to this DTD. *)
-
-    method element : string -> dtd_element
-      (* looks up the element declaration with the given name. Raises 
-       * Validation_error if the element cannot be found. (If "allow_arbitrary"
-       * has been invoked before, Unrestricted is raised instead.)
-       *)
-
-    method element_names : string list
-      (* returns the list of the names of all element declarations. *)
-
-    method gen_entity : string -> (Pxp_entity.entity * bool)
-      (* let e, extdecl = obj # gen_entity n:
-       * looks up the general entity 'e' with the name 'n'. Raises
-       * WF_error if the entity cannot be found.
-       * 'extdecl': indicates whether the entity declaration occured in an 
-       * external entity.
-       *)
-
-    method gen_entity_names : string list
-      (* returns the list of all general entity names *)
-
-    method par_entity : string -> Pxp_entity.entity
-      (* looks up the parameter entity with the given name. Raises
-       * WF_error if the entity cannot be found.
-       *)
-
-    method par_entity_names : string list
-      (* returns the list of all parameter entity names *)
-
-    method notation : string -> dtd_notation
-      (* looks up the notation declaration with the given name. Raises
-       * Validation_error if the notation cannot be found. (If "allow_arbitrary"
-       * has been invoked before, Unrestricted is raised instead.)
-       *)
-
-    method notation_names : string list
-      (* Returns the list of the names of all added notations *)
-
-    method pinstr : string -> proc_instruction list
-      (* looks up all processing instructions with the given target.
-       * The "target" is the identifier following "<?".
-       * Note: It is not possible to find out the exact position of the
-       * processing instruction.
-       *)
-
-    method pinstr_names : string list
-      (* Returns the list of the names (targets) of all added pinstrs *)
-
-    method validate : unit
-      (* ensures that the DTD is valid. This method is optimized such that
-       * actual validation is only performed if DTD has changed.
-       * If the DTD is invalid, mostly a Validation_error is raised,
-       * but other exceptions are possible, too.
-       *)
-
-    method only_deterministic_models : unit
-      (* Succeeds if all regexp content models are deterministic. 
-       * Otherwise Validation_error.
-       *)
-
-    method write : Pxp_types.output_stream -> Pxp_types.encoding -> bool -> unit
-      (* write_compact_as_latin1 os enc doctype:
-       * Writes the DTD as 'enc'-encoded string to 'os'. If 'doctype', a 
-       * DTD like <!DOCTYPE root [ ... ]> is written. If 'not doctype',
-       * only the declarations are written (the material within the
-       * square brackets).
-       *)
-
-    method write_compact_as_latin1 : Pxp_types.output_stream -> bool -> unit
-      (* DEPRECATED METHOD; included only to keep compatibility with
-       * older versions of the parser
-       *)
-
-
-    (*----------------------------------------*)
-    method invalidate : unit
-      (* INTERNAL METHOD *)
-    method warner : Pxp_types.collect_warnings
-      (* INTERNAL METHOD *)
-  end
-
-
-
-(* ---------------------------------------------------------------------- *)
-
-and dtd_element : dtd -> string -> 
-  (* Creation:
-   *   new dtd_element init_dtd init_name:
-   * creates a new dtd_element object for init_dtd with init_name.
-   * The strings are represented in the same encoding as init_dtd.
-   *)
-  object
-
-    method name : string
-      (* returns the name of the declared element *)
-
-    method externally_declared : bool
-      (* returns whether the element declaration occurs in an external
-       * entity.
-       *)
-
-    method content_model : Pxp_types.content_model_type
-      (* get the content model of this element declaration, or Unspecified *)
-
-    method content_dfa : Pxp_dfa.dfa_definition option
-      (* return the DFA of the content model if there is a DFA, or None.
-       * A DFA exists only for regexp style content models which are
-       * deterministic.
-       *)
-
-    method set_cm_and_extdecl : Pxp_types.content_model_type -> bool -> unit
-      (* set_cm_and_extdecl cm extdecl:
-       * set the content model to 'cm'. Once the content model is not 
-       * Unspecified, it cannot be set to a different value again.
-       * Furthermore, it is set whether the element occurs in an external
-       * entity ('extdecl').
-       *)
-
-    method encoding : Pxp_types.rep_encoding
-      (* Return the encoding of the strings *)
-
-    method allow_arbitrary : unit
-      (* After this method has been invoked, the object changes its behaviour:
-       * - attributes that have not been added may be used in an
-       *   arbitrary way; the method "attribute" indicates this
-       *   by raising Undeclared instead of Validation_error.
-       *)
-
-    method disallow_arbitrary : unit
-
-    method arbitrary_allowed : bool
-      (* Returns whether arbitrary attributes are allowed or not. *)
-
-    method attribute : string -> 
-                         Pxp_types.att_type * Pxp_types.att_default
-      (* get the type and default value of a declared attribute, or raise
-       * Validation_error if the attribute does not exist.
-       * If 'arbitrary_allowed', the exception Undeclared is raised instead
-       * of Validation_error.
-       *)
-
-    method attribute_violates_standalone_declaration : 
-               string -> string option -> bool
-      (* attribute_violates_standalone_declaration name v:
-       * Checks whether the attribute 'name' violates the "standalone"
-       * declaration if it has value 'v'.
-       * The method returns true if:
-       * - The attribute declaration occurs in an external entity, 
-       * and if one of the two conditions holds:
-       * - v = None, and there is a default for the attribute value
-       * - v = Some s, and the type of the attribute is not CDATA,
-       *   and s changes if normalized according to the rules of the
-       *   attribute type.
-       *
-       * The method raises Validation_error if the attribute does not exist.
-       * If 'arbitrary_allowed', the exception Undeclared is raised instead
-       * of Validation_error.
-       *)
-
-    method attribute_names : string list
-      (* get the list of all declared attributes *)
-
-    method names_of_required_attributes : string list
-      (* get the list of all attributes that are specified as required 
-       * attributes
-       *)
-
-    method id_attribute_name : string option
-      (* Returns the name of the attribute with type ID, or None. *)
-
-    method idref_attribute_names : string list
-      (* Returns the names of the attributes with type IDREF or IDREFS. *)
-
-    method add_attribute : string -> 
-                           Pxp_types.att_type -> 
-			   Pxp_types.att_default -> 
-			   bool ->
-			     unit
-      (* add_attribute name type default extdecl:
-       * add an attribute declaration for an attribute with the given name,
-       * type, and default value. If there is more than one declaration for
-       * an attribute name, the first declaration counts; the other declarations
-       * are ignored.
-       * 'extdecl': if true, the attribute declaration occurs in an external
-       * entity. This property is used to check the "standalone" attribute.
-       *)
-
-    method validate : unit
-      (* checks whether this element declaration (i.e. the content model and
-       * all attribute declarations) is valid for the associated DTD.
-       * Raises mostly Validation_error if the validation fails.
-       *)
-
-    method write : Pxp_types.output_stream -> Pxp_types.encoding -> unit
-      (* write_compact_as_latin1 os enc:
-       * Writes the <!ELEMENT ... > declaration to 'os' as 'enc'-encoded string.
-       *)
-
-    method write_compact_as_latin1 : Pxp_types.output_stream -> unit
-      (* DEPRECATED METHOD; included only to keep compatibility with
-       * older versions of the parser
-       *)
-  end
-
-(* ---------------------------------------------------------------------- *)
-
-and dtd_notation : string -> Pxp_types.ext_id -> Pxp_types.rep_encoding ->
-  (* Creation:
-   *    new dtd_notation a_name an_external_ID init_encoding
-   * creates a new dtd_notation object with the given name and the given
-   * external ID.
-   *)
-  object
-    method name : string
-    method ext_id : Pxp_types.ext_id
-    method encoding : Pxp_types.rep_encoding
-
-    method write : Pxp_types.output_stream -> Pxp_types.encoding -> unit
-      (* write_compact_as_latin1 os enc:
-       * Writes the <!NOTATION ... > declaration to 'os' as 'enc'-encoded 
-       * string.
-       *)
-
-    method write_compact_as_latin1 : Pxp_types.output_stream -> unit
-      (* DEPRECATED METHOD; included only to keep compatibility with
-       * older versions of the parser
-       *)
-
-  end
-
-(* ---------------------------------------------------------------------- *)
-
-and proc_instruction : string -> string -> Pxp_types.rep_encoding ->
-  (* Creation:
-   *   new proc_instruction a_target a_value
-   * creates a new proc_instruction object with the given target string and
-   * the given value string. 
-   * Note: A processing instruction is written as <?target value?>. 
-   *)
-  object
-    method target : string
-    method value : string
-    method encoding : Pxp_types.rep_encoding
-
-    method write : Pxp_types.output_stream -> Pxp_types.encoding -> unit
-      (* write os enc:
-       * Writes the <?...?> PI to 'os' as 'enc'-encoded string.
-       *)
-
-    method write_compact_as_latin1 : Pxp_types.output_stream -> unit
-      (* DEPRECATED METHOD; included only to keep compatibility with
-       * older versions of the parser
-       *)
-
-    method parse_pxp_option : (string * string * (string * string) list)
-      (* Parses a PI containing a PXP option. Such PIs are formed like:
-       *   <?target option-name option-att="value" option-att="value" ... ?>
-       * The method returns a triple
-       *   (target, option-name, [option-att, value; ...])
-       * or raises Error.
-       *)
-
-  end
-
-;;


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Resolvers and sourcesUpInvoking the parser
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The PXP user's guide
PrevChapter 4. Configuring and calling the parserNext

4.4. Invoking the parser

Here a description of Pxp_yacc.

4.4.1. Defaults

The following defaults are available: - -

val default_config : config
-val default_extension : ('a node extension) as 'a
-val default_spec : ('a node extension as 'a) spec

4.4.2. Parsing functions

In the following, the term "closed document" refers to -an XML structure like - -

<!DOCTYPE ... [ declarations ] >
-<root>
-...
-</root>
- -The term "fragment" refers to an XML structure like - -
<root>
-...
-</root>
- -i.e. only to one isolated element instance.

val parse_dtd_entity : config -> source -> dtd
- -Parses the declarations which are contained in the entity, and returns them as -dtd object.

val extract_dtd_from_document_entity : config -> source -> dtd
- -Extracts the DTD from a closed document. Both the internal and the external -subsets are extracted and combined to one dtd object. This -function does not parse the whole document, but only the parts that are -necessary to extract the DTD.

val parse_document_entity : 
-    ?transform_dtd:(dtd -> dtd) ->
-    ?id_index:('ext index) ->
-    config -> 
-    source -> 
-    'ext spec -> 
-        'ext document
- -Parses a closed document and validates it against the DTD that is contained in -the document (internal and external subsets). The option -~transform_dtd can be used to transform the DTD in the -document, and to use the transformed DTD for validation. If -~id_index is specified, an index of all ID attributes is -created.

val parse_wfdocument_entity : 
-    config -> 
-    source -> 
-    'ext spec -> 
-        'ext document
- -Parses a closed document, but checks it only on well-formedness.

val parse_content_entity  : 
-    ?id_index:('ext index) ->
-    config ->  
-    source -> 
-    dtd -> 
-    'ext spec -> 
-        'ext node
- -Parses a fragment, and validates the element.

val parse_wfcontent_entity : 
-    config -> 
-    source -> 
-    'ext spec -> 
-        'ext node
- -Parses a fragment, but checks it only on well-formedness.

4.4.3. Configuration options

type config =
-    { warner : collect_warnings;
-      errors_with_line_numbers : bool;
-      enable_pinstr_nodes : bool;
-      enable_super_root_node : bool;
-      enable_comment_nodes : bool;
-      encoding : rep_encoding;
-      recognize_standalone_declaration : bool;
-      store_element_positions : bool;
-      idref_pass : bool;
-      validate_by_dfa : bool;
-      accept_only_deterministic_models : bool;
-      ...
-    }
- -

  • warner:The parser prints -warnings by invoking the method warn for this warner -object. (Default: all warnings are dropped)

  • errors_with_line_numbers:If -true, errors contain line numbers; if false, errors contain only byte -positions. The latter mode is faster. (Default: true)

  • enable_pinstr_nodes:If true, -the parser creates extra nodes for processing instructions. If false, -processing instructions are simply added to the element or document surrounding -the instructions. (Default: false)

  • enable_super_root_node:If -true, the parser creates an extra node which is the parent of the root of the -document tree. This node is called super root; it is an element with type -T_super_root. - If there are processing instructions outside -the root element and outside the DTD, they are added to the super root instead -of the document. - If false, the super root node is not created. (Default: -false)

  • enable_comment_nodes:If true, -the parser creates nodes for comments with type T_comment; -if false, such nodes are not created. (Default: false)

  • encoding:Specifies the -internal encoding of the parser. Most strings are then represented according to -this encoding; however there are some exceptions (especially -ext_id values which are always UTF-8 encoded). -(Default: `Enc_iso88591)

  • recognize_standalone_declaration: If true and if the parser is -validating, the standalone="yes" declaration forces that it -is checked whether the document is a standalone document. - If false, or if the -parser is in well-formedness mode, such declarations are ignored. -(Default: true)

  • store_element_positions: If -true, for every non-data node the source position is stored. If false, the -position information is lost. If available, you can get the positions of nodes -by invoking the position method. -(Default: true)

  • idref_pass:If true and if -there is an ID index, the parser checks whether every IDREF or IDREFS attribute -refer to an existing node; this requires that the parser traverses the whole -doument tree. If false, this check is left out. (Default: false)

  • validate_by_dfa:If true and if -the content model for an element type is deterministic, a deterministic finite -automaton is used to validate whether the element contents match the content -model of the type. If false, or if a DFA is not available, a backtracking -algorithm is used for validation. (Default: true)

  • accept_only_deterministic_models: If true, only deterministic content -models are accepted; if false, any syntactically correct content models can be -processed. (Default: true)

4.4.4. Which configuration should I use?

First, I recommend to vary the default configuration instead of -creating a new configuration record. For instance, to set -idref_pass to true, change the default -as in: -

let config = { default_config with idref_pass = true }
-The background is that I can add more options to the record in future versions -of the parser without breaking your programs.

Do I need extra nodes for processing instructions? By default, such nodes are not created. This does not mean that the -processing instructions are lost; however, you cannot find out the exact -location where they occur. For example, the following XML text - -

<x><?pi1?><y/><?pi2?></x> 
- -will normally create one element node for x containing -one subnode for y. The processing -instructions are attached to x in a separate hash table; you -can access them using x # pinstr "pi1" and x # -pinstr "pi2", respectively. The information is lost where the -instructions occur within x.

If the option enable_pinstr_nodes is -turned on, the parser creates extra nodes pi1 and -pi2 such that the subnodes of x are now: - -

x # sub_nodes = [ pi1; y; pi2 ]
- -The extra nodes contain the processing instructions in the usual way, i.e. you -can access them using pi1 # pinstr "pi1" and pi2 # -pinstr "pi2", respectively.

Note that you will need an exemplar for the PI nodes (see -make_spec_from_alist).

Do I need a super root node? By default, there is no super root node. The -document object refers directly to the node representing the -root element of the document, i.e. - -

doc # root = r
- -if r is the root node. This is sometimes inconvenient: (1) -Some algorithms become simpler if every node has a parent, even the root -node. (2) Some standards such as XPath call the "root node" the node whose -child represents the root of the document. (3) The super root node can serve -as a container for processing instructions outside the root element. Because of -these reasons, it is possible to create an extra super root node, whose child -is the root node: - -
doc # root = sr         &&
-sr # sub_nodes = [ r ]
- -When extra nodes are also created for processing instructions, these nodes can -be added to the super root node if they occur outside the root element (reason -(3)), and the order reflects the order in the source text.

Note that you will need an exemplar for the super root node -(see make_spec_from_alist).

What is the effect of the UTF-8 encoding? By default, the parser represents strings (with few -exceptions) as ISO-8859-1 strings. These are well-known, and there are tools -and fonts for this encoding.

However, internationalization may require that you switch over -to UTF-8 encoding. In most environments, the immediate effect will be that you -cannot read strings with character codes >= 160 any longer; your terminal will -only show funny glyph combinations. It is strongly recommended to install -Unicode fonts (GNU Unifont, -Markus Kuhn's fonts) and terminal emulators -that can handle UTF-8 byte sequences. Furthermore, a Unicode editor may -be helpful (such as Yudit). There are -also FAQ by -Markus Kuhn.

By setting encoding to -`Enc_utf8 all strings originating from the parsed XML -document are represented as UTF-8 strings. This includes not only character -data and attribute values but also element names, attribute names and so on, as -it is possible to use any Unicode letter to form such names. Strictly -speaking, PXP is only XML-compliant if the UTF-8 mode is used; otherwise it -will have difficulties when validating documents containing -non-ISO-8859-1-names.

This mode does not have any impact on the external -representation of documents. The character set assumed when reading a document -is set in the XML declaration, and character set when writing a document must -be passed to the write method.

How do I check that nodes exist which are referred by IDREF attributes? First, you must create an index of all occurring ID -attributes: - -

let index = new hash_index
- -This index must be passed to the parsing function: - -
parse_document_entity
-  ~id_index:(index :> index)
-  config source spec
- -Next, you must turn on the idref_pass mode: - -
let config = { default_config with idref_pass = true }
- -Note that now the whole document tree will be traversed, and every node will be -checked for IDREF and IDREFS attributes. If the tree is big, this may take some -time.

What are deterministic content models? These type of models can speed up the validation checks; -furthermore they ensure SGML-compatibility. In particular, a content model is -deterministic if the parser can determine the actually used alternative by -inspecting only the current token. For example, this element has -non-deterministic contents: - -

<!ELEMENT x ((u,v) | (u,y+) | v)>
- -If the first element in x is u, the -parser does not know which of the alternatives (u,v) or -(u,y+) will work; the parser must also inspect the second -element to be able to distinguish between the alternatives. Because such -look-ahead (or "guessing") is required, this example is -non-deterministic.

The XML standard demands that content models must be -deterministic. So it is recommended to turn the option -accept_only_deterministic_models on; however, PXP can also -process non-deterministic models using a backtracking algorithm.

Deterministic models ensure that validation can be performed in -linear time. In order to get the maximum benefits, PXP also implements a -special validator that profits from deterministic models; this is the -deterministic finite automaton (DFA). This validator is enabled per element -type if the element type has a deterministic model and if the option -validate_by_dfa is turned on.

In general, I expect that the DFA method is faster than the -backtracking method; especially in the worst case the DFA takes only linear -time. However, if the content model has only few alternatives and the -alternatives do not nest, the backtracking algorithm may be better.


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The DTD classesUpUpdates
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The PXP user's guide
PrevChapter 4. Configuring and calling the parser 

4.5. Updates

Some (often later added) features that are otherwise -not explained in the manual but worth to be mentioned.

  • Methods node_position, node_path, nth_node, -previous_node, next_node for nodes: See pxp_document.mli

  • Functions to determine the document order of nodes: -compare, create_ord_index, ord_number, ord_compare: See pxp_document.mli


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Invoking the parserUp 
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PrevChapter 1. What is XML?Next

1.3. A complete example: The readme DTD

The reason for readme was that I often wrote two versions -of files such as README and INSTALL which explain aspects of a distributed -software archive; one version was ASCII-formatted, the other was written in -HTML. Maintaining both versions means double amount of work, and changes -of one version may be forgotten in the other version. To improve this situation -I invented the readme DTD which allows me to maintain only -one source written as XML document, and to generate the ASCII and the HTML -version from it.

In this section, I explain only the DTD. The readme DTD is -contained in the PXP distribution together with the two converters to -produce ASCII and HTML. Another section of this manual describes the HTML -converter.

The documents have a simple structure: There are up to three levels of nested -sections, paragraphs, item lists, footnotes, hyperlinks, and text emphasis. The -outermost element has usually the type readme, it is -declared by - -

<!ELEMENT readme (sect1+)>
-<!ATTLIST readme
-          title CDATA #REQUIRED>
- -This means that this element contains one or more sections of the first level -(element type sect1), and that the element has a required -attribute title containing character data (CDATA). Note that -readme elements must not contain text data.

The three levels of sections are declared as follows: - -

<!ELEMENT sect1 (title,(sect2|p|ul)+)>
-
-<!ELEMENT sect2 (title,(sect3|p|ul)+)>
-
-<!ELEMENT sect3 (title,(p|ul)+)>
- -Every section has a title element as first subelement. After -the title an arbitrary but non-empty sequence of inner sections, paragraphs and -item lists follows. Note that the inner sections must belong to the next higher -section level; sect3 elements must not contain inner -sections because there is no next higher level.

Obviously, all three declarations allow paragraphs (p) and -item lists (ul). The definition can be simplified at this -point by using a parameter entity: - -

<!ENTITY % p.like "p|ul">
-
-<!ELEMENT sect1 (title,(sect2|%p.like;)+)>
-
-<!ELEMENT sect2 (title,(sect3|%p.like;)+)>
-
-<!ELEMENT sect3 (title,(%p.like;)+)>
- -Here, the entity p.like is nothing but a macro abbreviating -the same sequence of declarations; if new elements on the same level as -p and ul are later added, it is -sufficient only to change the entity definition. Note that there are some -restrictions on the usage of entities in this context; most important, entities -containing a left paranthesis must also contain the corresponding right -paranthesis.

Note that the entity p.like is a -parameter entity, i.e. the ENTITY declaration contains a -percent sign, and the entity is referred to by -%p.like;. This kind of entity must be used to abbreviate -parts of the DTD; the general entities declared without -percent sign and referred to as &name; are not allowed -in this context.

The title element specifies the title of the section in -which it occurs. The title is given as character data, optionally interspersed -with line breaks (br): - -

<!ELEMENT title (#PCDATA|br)*>
- -Compared with the title attribute of -the readme element, this element allows inner markup -(i.e. br) while attribute values do not: It is an error if -an attribute value contains the left angle bracket < literally such that it -is impossible to include inner elements.

The paragraph element p has a structure similar to -title, but it allows more inner elements: - -

<!ENTITY % text "br|code|em|footnote|a">
-
-<!ELEMENT p (#PCDATA|%text;)*>
- -Line breaks do not have inner structure, so they are declared as being empty: - -
<!ELEMENT br EMPTY>
- -This means that really nothing is allowed within br; you -must always write <br></br> or abbreviated -<br/>.

Code samples should be marked up by the code tag; emphasized -text can be indicated by em: - -

<!ELEMENT code (#PCDATA)>
-
-<!ELEMENT em (#PCDATA|%text;)*>
- -That code elements are not allowed to contain further markup -while em elements do is a design decision by the author of -the DTD.

Unordered lists simply consists of one or more list items, and a list item may -contain paragraph-level material: - -

<!ELEMENT ul (li+)>
-
-<!ELEMENT li (%p.like;)*>
- -Footnotes are described by the text of the note; this text may contain -text-level markup. There is no mechanism to describe the numbering scheme of -footnotes, or to specify how footnote references are printed. - -
<!ELEMENT footnote (#PCDATA|%text;)*>
- -Hyperlinks are written as in HTML. The anchor tag contains the text describing -where the link points to, and the href attribute is the -pointer (as URL). There is no way to describe locations of "hash marks". If the -link refers to another readme document, the attribute -readmeref should be used instead of href. -The reason is that the converted document has usually a different system -identifier (file name), and the link to a converted document must be -converted, too. - -
<!ELEMENT a (#PCDATA)*>
-<!ATTLIST a 
-          href      CDATA #IMPLIED
-          readmeref CDATA #IMPLIED
->
- -Note that although it is only sensible to specify one of the two attributes, -the DTD has no means to express this restriction.

So far the DTD. Finally, here is a document for it: - -

<?xml version="1.0" encoding="ISO-8859-1"?>
-<!DOCTYPE readme SYSTEM "readme.dtd">
-<readme title="How to use the readme converters">
-<sect1>
-  <title>Usage</title>
-  <p>
-    The <em>readme</em> converter is invoked on the command line by:
-  </p>
-  <p>
-    <code>readme [ -text | -html ] input.xml</code>
-  </p>
-  <p>
-    Here a list of options:
-  </p>
-  <ul>
-    <li>
-      <p><code>-text</code>: specifies that ASCII output should be produced</p>
-    </li>
-    <li>
-      <p><code>-html</code>: specifies that HTML output should be produced</p>
-    </li>
-  </ul>
-  <p>
-    The input file must be given on the command line. The converted output is
-    printed to <em>stdout</em>.
-  </p>
-</sect1>
-<sect1>
-  <title>Author</title>
-  <p>
-    The program has been written by
-    <a href="mailto:Gerd.Stolpmann@darmstadt.netsurf.de">Gerd Stolpmann</a>.
-  </p>
-</sect1>
-</readme>


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Highlights of XMLUpUsing PXP
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2.2. How to parse a document from an application

Let me first give a rough overview of the object model of the parser. The -following items are represented by objects: - -

  • Documents: The document representation is more or less the -anchor for the application; all accesses to the parsed entities start here. It -is described by the class document contained in the module -Pxp_document. You can get some global information, such -as the XML declaration the document begins with, the DTD of the document, -global processing instructions, and most important, the document tree.

  • The contents of documents: The contents have the structure -of a tree: Elements contain other elements and text[1]. - -The common type to represent both kinds of content is node -which is a class type that unifies the properties of elements and character -data. Every node has a list of children (which is empty if the element is empty -or the node represents text); nodes may have attributes; nodes have always text -contents. There are two implementations of node, the class -element_impl for elements, and the class -data_impl for text data. You find these classes and class -types in the module Pxp_document, too.

    Note that attribute lists are represented by non-class values.

  • The node extension: For advanced usage, every node of the -document may have an associated extension which is simply -a second object. This object must have the three methods -clone, node, and -set_node as bare minimum, but you are free to add methods as -you want. This is the preferred way to add functionality to the document -tree[2]. The class type extension is -defined in Pxp_document, too.

  • The DTD: Sometimes it is necessary to access the DTD of a -document; the average application does not need this feature. The class -dtd describes DTDs, and makes it possible to get -representations of element, entity, and notation declarations as well as -processing instructions contained in the DTD. This class, and -dtd_element, dtd_notation, and -proc_instruction can be found in the module -Pxp_dtd. There are a couple of classes representing -different kinds of entities; these can be found in the module -Pxp_entity.

- -Additionally, the following modules play a role: - -

  • Pxp_yacc: Here the main parsing functions such as -parse_document_entity are located. Some additional types and -functions allow the parser to be configured in a non-standard way.

  • Pxp_types: This is a collection of basic types and -exceptions.

- -There are some further modules that are needed internally but are not part of -the API.

Let the document to be parsed be stored in a file called -doc.xml. The parsing process is started by calling the -function - -

val parse_document_entity : config -> source -> 'ext spec -> 'ext document
- -defined in the module Pxp_yacc. The first argument -specifies some global properties of the parser; it is recommended to start with -the default_config. The second argument determines where the -document to be parsed comes from; this may be a file, a channel, or an entity -ID. To parse doc.xml, it is sufficient to pass -from_file "doc.xml".

The third argument passes the object specification to use. Roughly -speaking, it determines which classes implement the node objects of which -element types, and which extensions are to be used. The 'ext -polymorphic variable is the type of the extension. For the moment, let us -simply pass default_spec as this argument, and ignore it.

So the following expression parses doc.xml: - -

open Pxp_yacc
-let d = parse_document_entity default_config (from_file "doc.xml") default_spec
- -Note that default_config implies that warnings are collected -but not printed. Errors raise one of the exception defined in -Pxp_types; to get readable errors and warnings catch the -exceptions as follows: - -
class warner =
-  object 
-    method warn w =
-      print_endline ("WARNING: " ^ w)
-  end
-;;
-
-try
-  let config = { default_config with warner = new warner } in
-  let d = parse_document_entity config (from_file "doc.xml") default_spec
-  in
-    ...
-with
-   e ->
-     print_endline (Pxp_types.string_of_exn e)
- -Now d is an object of the document -class. If you want the node tree, you can get the root element by - -
let root = d # root
- -and if you would rather like to access the DTD, determine it by - -
let dtd = d # dtd
- -As it is more interesting, let us investigate the node tree now. Given the root -element, it is possible to recursively traverse the whole tree. The children of -a node n are returned by the method -sub_nodes, and the type of a node is returned by -node_type. This function traverses the tree, and prints the -type of each node: - -
let rec print_structure n =
-  let ntype = n # node_type in
-  match ntype with
-    T_element name ->
-      print_endline ("Element of type " ^ name);
-      let children = n # sub_nodes in
-      List.iter print_structure children
-  | T_data ->
-      print_endline "Data"
-  | _ ->
-      (* Other node types are not possible unless the parser is configured
-         differently.
-       *)
-      assert false
- -You can call this function by - -
print_structure root
- -The type returned by node_type is either T_element -name or T_data. The name of the -element type is the string included in the angle brackets. Note that only -elements have children; data nodes are always leaves of the tree.

There are some more methods in order to access a parsed node tree: - -

  • n # parent: Returns the parent node, or raises -Not_found if the node is already the root

  • n # root: Returns the root of the node tree.

  • n # attribute a: Returns the value of the attribute with -name a. The method returns a value for every -declared attribute, independently of whether the attribute -instance is defined or not. If the attribute is not declared, -Not_found will be raised. (In well-formedness mode, every -attribute is considered as being implicitly declared with type -CDATA.)

    The following return values are possible: Value s, -Valuelist sl , and Implied_value. -The first two value types indicate that the attribute value is available, -either because there is a definition -a="value" -in the XML text, or because there is a default value (declared in the -DTD). Only if both the instance definition and the default declaration are -missing, the latter value Implied_value will be returned.

    In the DTD, every attribute is typed. There are single-value types (CDATA, ID, -IDREF, ENTITY, NMTOKEN, enumerations), in which case the method passes -Value s back, where s is the normalized -string value of the attribute. The other types (IDREFS, ENTITIES, NMTOKENS) -represent list values, and the parser splits the XML literal into several -tokens and returns these tokens as Valuelist sl.

    Normalization means that entity references (the -&name; tokens) and -character references -(&#number;) are replaced -by the text they represent, and that white space characters are converted into -plain spaces.

  • n # data: Returns the character data contained in the -node. For data nodes, the meaning is obvious as this is the main content of -data nodes. For element nodes, this method returns the concatenated contents of -all inner data nodes.

    Note that entity references included in the text are resolved while they are -being parsed; for example the text "a &lt;&gt; b" will be returned -as "a <> b" by this method. Spaces of data nodes are always -preserved. Newlines are preserved, but always converted to \n characters even -if newlines are encoded as \r\n or \r. Normally you will never see two adjacent -data nodes because the parser collapses all data material at one location into -one node. (However, if you create your own tree or transform the parsed tree, -it is possible to have adjacent data nodes.)

    Note that elements that do not allow #PCDATA as content -will not have data nodes as children. This means that spaces and newlines, the -only character material allowed for such elements, are silently dropped.

- -For example, if the task is to print all contents of elements with type -"valuable" whose attribute "priority" is "1", this function can help: - -
let rec print_valuable_prio1 n =
-  let ntype = n # node_type in
-  match ntype with
-    T_element "valuable" when n # attribute "priority" = Value "1" ->
-      print_endline "Valuable node with priotity 1 found:";
-      print_endline (n # data)
-  | (T_element _ | T_data) ->
-      let children = n # sub_nodes in
-      List.iter print_valuable_prio1 children
-  | _ ->
-      assert false
- -You can call this function by: - -
print_valuable_prio1 root
- -If you like a DSSSL-like style, you can make the function -process_children explicit: - -
let rec print_valuable_prio1 n =
-
-  let process_children n =
-    let children = n # sub_nodes in
-    List.iter print_valuable_prio1 children 
-  in
-
-  let ntype = n # node_type in
-  match ntype with
-    T_element "valuable" when n # attribute "priority" = Value "1" ->
-      print_endline "Valuable node with priority 1 found:";
-      print_endline (n # data)
-  | (T_element _ | T_data) ->
-      process_children n
-  | _ ->
-      assert false
- -So far, O'Caml is now a simple "style-sheet language": You can form a big -"match" expression to distinguish between all significant cases, and provide -different reactions on different conditions. But this technique has -limitations; the "match" expression tends to get larger and larger, and it is -difficult to store intermediate values as there is only one big -recursion. Alternatively, it is also possible to represent the various cases as -classes, and to use dynamic method lookup to find the appropiate class. The -next section explains this technique in detail.

Notes

[1]

Elements may -also contain processing instructions. Unlike other document models, PXP -separates processing instructions from the rest of the text and provides a -second interface to access them (method pinstr). However, -there is a parser option (enable_pinstr_nodes) which changes -the behaviour of the parser such that extra nodes for processing instructions -are included into the tree.

Furthermore, the tree does normally not contain nodes for XML comments; -they are ignored by default. Again, there is an option -(enable_comment_nodes) changing this.

[2]

Due to the typing system it is more or less impossible to -derive recursive classes in O'Caml. To get around this, it is common practice -to put the modifiable or extensible part of recursive objects into parallel -objects.


PrevHomeNext
Using PXPUpClass-based processing of the node tree
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The PXP user's guide
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2.3. Class-based processing of the node tree

By default, the parsed node tree consists of objects of the same class; this is -a good design as long as you want only to access selected parts of the -document. For complex transformations, it may be better to use different -classes for objects describing different element types.

For example, if the DTD declares the element types a, -b, and c, and if the task is to convert -an arbitrary document into a printable format, the idea is to define for every -element type a separate class that has a method print. The -classes are eltype_a, eltype_b, and -eltype_c, and every class implements -print such that elements of the type corresponding to the -class are converted to the output format.

The parser supports such a design directly. As it is impossible to derive -recursive classes in O'Caml[1], the specialized element classes cannot be formed by -simply inheriting from the built-in classes of the parser and adding methods -for customized functionality. To get around this limitation, every node of the -document tree is represented by two objects, one called -"the node" and containing the recursive definition of the tree, one called "the -extension". Every node object has a reference to the extension, and the -extension has a reference to the node. The advantage of this model is that it -is now possible to customize the extension without affecting the typing -constraints of the recursive node definition.

Every extension must have the three methods clone, -node, and set_node. The method -clone creates a deep copy of the extension object and -returns it; node returns the node object for this extension -object; and set_node is used to tell the extension object -which node is associated with it, this method is automatically called when the -node tree is initialized. The following definition is a good starting point -for these methods; usually clone must be further refined -when instance variables are added to the class: - -

class custom_extension =
-  object (self)
-
-    val mutable node = (None : custom_extension node option)
-
-    method clone = {< >} 
-    method node =
-      match node with
-          None ->
-            assert false
-        | Some n -> n
-    method set_node n =
-      node <- Some n
-
-  end
- -This part of the extension is usually the same for all classes, so it is a good -idea to consider custom_extension as the super-class of the -further class definitions. Continuining the example of above, we can define the -element type classes as follows: - -
class virtual custom_extension =
-  object (self)
-    ... clone, node, set_node defined as above ...
-
-    method virtual print : out_channel -> unit
-  end
-
-class eltype_a =
-  object (self)
-    inherit custom_extension
-    method print ch = ...
-  end
-
-class eltype_b =
-  object (self)
-    inherit custom_extension
-    method print ch = ...
-  end
-
-class eltype_c =
-  object (self)
-    inherit custom_extension
-    method print ch = ...
-  end
- -The method print can now be implemented for every element -type separately. Note that you get the associated node by invoking - -
self # node
- -and you get the extension object of a node n by writing - -
n # extension
- -It is guaranteed that - -
self # node # extension == self
- -always holds.

Here are sample definitions of the print -methods: - -

class eltype_a =
-  object (self)
-    inherit custom_extension
-    method print ch = 
-      (* Nodes <a>...</a> are only containers: *)
-      output_string ch "(";
-      List.iter
-        (fun n -> n # extension # print ch)
-        (self # node # sub_nodes);
-      output_string ch ")";
-  end
-
-class eltype_b =
-  object (self)
-    inherit custom_extension
-    method print ch =
-      (* Print the value of the CDATA attribute "print": *)
-      match self # node # attribute "print" with
-        Value s       -> output_string ch s
-      | Implied_value -> output_string ch "<missing>"
-      | Valuelist l   -> assert false   
-                         (* not possible because the att is CDATA *)
-  end
-
-class eltype_c =
-  object (self)
-    inherit custom_extension
-    method print ch = 
-      (* Print the contents of this element: *)
-      output_string ch (self # node # data)
-  end
-
-class null_extension =
-  object (self)
-    inherit custom_extension
-    method print ch = assert false
-  end

The remaining task is to configure the parser such that these extension classes -are actually used. Here another problem arises: It is not possible to -dynamically select the class of an object to be created. As workaround, -PXP allows the user to specify exemplar objects for -the various element types; instead of creating the nodes of the tree by -applying the new operator the nodes are produced by -duplicating the exemplars. As object duplication preserves the class of the -object, one can create fresh objects of every class for which previously an -exemplar has been registered.

Exemplars are meant as objects without contents, the only interesting thing is -that exemplars are instances of a certain class. The creation of an exemplar -for an element node can be done by: - -

let element_exemplar = new element_impl extension_exemplar
- -And a data node exemplar is created by: - -
let data_exemplar = new data_impl extension_exemplar
- -The classes element_impl and data_impl -are defined in the module Pxp_document. The constructors -initialize the fresh objects as empty objects, i.e. without children, without -data contents, and so on. The extension_exemplar is the -initial extension object the exemplars are associated with.

Once the exemplars are created and stored somewhere (e.g. in a hash table), you -can take an exemplar and create a concrete instance (with contents) by -duplicating it. As user of the parser you are normally not concerned with this -as this is part of the internal logic of the parser, but as background knowledge -it is worthwhile to mention that the two methods -create_element and create_data actually -perform the duplication of the exemplar for which they are invoked, -additionally apply modifications to the clone, and finally return the new -object. Moreover, the extension object is copied, too, and the new node object -is associated with the fresh extension object. Note that this is the reason why -every extension object must have a clone method.

The configuration of the set of exemplars is passed to the -parse_document_entity function as third argument. In our -example, this argument can be set up as follows: - -

let spec =
-  make_spec_from_alist
-    ~data_exemplar:            (new data_impl (new null_extension))
-    ~default_element_exemplar: (new element_impl (new null_extension))
-    ~element_alist:
-       [ "a",  new element_impl (new eltype_a);
-         "b",  new element_impl (new eltype_b);
-         "c",  new element_impl (new eltype_c);
-       ]
-    ()
- -The ~element_alist function argument defines the mapping -from element types to exemplars as associative list. The argument -~data_exemplar specifies the exemplar for data nodes, and -the ~default_element_exemplar is used whenever the parser -finds an element type for which the associative list does not define an -exemplar.

The configuration is now complete. You can still use the same parsing -functions, only the initialization is a bit different. For example, call the -parser by: - -

let d = parse_document_entity default_config (from_file "doc.xml") spec
- -Note that the resulting document d has a usable type; -especially the print method we added is visible. So you can -print your document by - -
d # root # extension # print stdout

This object-oriented approach looks rather complicated; this is mostly caused -by working around some problems of the strict typing system of O'Caml. Some -auxiliary concepts such as extensions were needed, but the practical -consequences are low. In the next section, one of the examples of the -distribution is explained, a converter from readme -documents to HTML.

Notes

[1]

The problem is that the subclass is -usually not a subtype in this case because O'Caml has a contravariant subtyping -rule.


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How to parse a document from an applicationUpExample: An HTML backend for the readme -DTD
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The PXP user's guide
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2.4. Example: An HTML backend for the readme -DTD

The converter from readme documents to HTML -documents follows strictly the approach to define one class per element -type. The HTML code is similar to the readme source, -because of this most elements can be converted in the following way: Given the -input element - -

<e>content</e>
- -the conversion text is the concatenation of a computed prefix, the recursively -converted content, and a computed suffix.

Only one element type cannot be handled by this scheme: -footnote. Footnotes are collected while they are found in -the input text, and they are printed after the main text has been converted and -printed.

2.4.1. Header

open Pxp_types
-open Pxp_document

2.4.2. Type declarations

class type footnote_printer =
-  object
-    method footnote_to_html : store_type -> out_channel -> unit
-  end
-
-and store_type =
-  object
-    method alloc_footnote : footnote_printer -> int
-    method print_footnotes : out_channel -> unit
-  end
-;;

2.4.3. Class store

The store is a container for footnotes. You can add a -footnote by invoking alloc_footnote; the argument is an -object of the class footnote_printer, the method returns the -number of the footnote. The interesting property of a footnote is that it can -be converted to HTML, so a footnote_printer is an object -with a method footnote_to_html. The class -footnote which is defined below has a compatible method -footnote_to_html such that objects created from it can be -used as footnote_printers.

The other method, print_footnotes prints the footnotes as -definition list, and is typically invoked after the main material of the page -has already been printed. Every item of the list is printed by -footnote_to_html.

class store =
-  object (self)
-
-    val mutable footnotes = ( [] : (int * footnote_printer) list )
-    val mutable next_footnote_number = 1
-
-    method alloc_footnote n =
-      let number = next_footnote_number in
-      next_footnote_number <- number+1;
-      footnotes <- footnotes @ [ number, n ];
-      number
-
-    method print_footnotes ch =
-      if footnotes <> [] then begin
-	output_string ch "<hr align=left noshade=noshade width=\"30%\">\n";
-	output_string ch "<dl>\n";
-	List.iter
-	  (fun (_,n) -> 
-	     n # footnote_to_html (self : #store_type :> store_type) ch)
-	  footnotes;
-	output_string ch "</dl>\n";
-      end
-
-  end
-;;

2.4.4. Function escape_html

This function converts the characters <, >, &, and " to their HTML -representation. For example, -escape_html "<>" = "&lt;&gt;". Other -characters are left unchanged. - -

let escape_html s =
-  Str.global_substitute
-    (Str.regexp "<\\|>\\|&\\|\"")
-    (fun s ->
-      match Str.matched_string s with
-        "<" -> "&lt;"
-      | ">" -> "&gt;"
-      | "&" -> "&amp;"
-      | "\"" -> "&quot;"
-      | _ -> assert false)
-    s
-;;

2.4.5. Virtual class shared

This virtual class is the abstract superclass of the extension classes shown -below. It defines the standard methods clone, -node, and set_node, and declares the type -of the virtual method to_html. This method recursively -traverses the whole element tree, and prints the converted HTML code to the -output channel passed as second argument. The first argument is the reference -to the global store object which collects the footnotes. - -

class virtual shared =
-  object (self)
-
-    (* --- default_ext --- *)
-
-    val mutable node = (None : shared node option)
-
-    method clone = {< >} 
-    method node =
-      match node with
-          None ->
-            assert false
-        | Some n -> n
-    method set_node n =
-      node <- Some n
-
-    (* --- virtual --- *)
-
-    method virtual to_html : store -> out_channel -> unit
-
-  end
-;;

2.4.6. Class only_data

This class defines to_html such that the character data of -the current node is converted to HTML. Note that self is an -extension object, self # node is the node object, and -self # node # data returns the character data of the node. - -

class only_data =
-  object (self)
-    inherit shared
-
-    method to_html store ch =
-      output_string ch (escape_html (self # node # data))
-  end
-;;

2.4.7. Class readme

This class converts elements of type readme to HTML. Such an -element is (by definition) always the root element of the document. First, the -HTML header is printed; the title attribute of the element -determines the title of the HTML page. Some aspects of the HTML page can be -configured by setting certain parameter entities, for example the background -color, the text color, and link colors. After the header, the -body tag, and the headline have been printed, the contents -of the page are converted by invoking to_html on all -children of the current node (which is the root node). Then, the footnotes are -appended to this by telling the global store object to print -the footnotes. Finally, the end tags of the HTML pages are printed.

This class is an example how to access the value of an attribute: The value is -determined by invoking self # node # attribute "title". As -this attribute has been declared as CDATA and as being required, the value has -always the form Value s where s is the -string value of the attribute.

You can also see how entity contents can be accessed. A parameter entity object -can be looked up by self # node # dtd # par_entity "name", -and by invoking replacement_text the value of the entity -is returned after inner parameter and character entities have been -processed. Note that you must use gen_entity instead of -par_entity to access general entities.

class readme =
-  object (self)
-    inherit shared
-
-    method to_html store ch =
-      (* output header *)
-      output_string 
-	ch "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\">";
-      output_string
-	ch "<!-- WARNING! This is a generated file, do not edit! -->\n";
-      let title = 
-	match self # node # attribute "title" with
-	    Value s -> s
-	  | _ -> assert false
-      in
-      let html_header, _ =
-	try (self # node # dtd # par_entity "readme:html:header") 
-            # replacement_text
-	with WF_error _ -> "", false in
-      let html_trailer, _ =
-	try (self # node # dtd # par_entity "readme:html:trailer")
-            # replacement_text
-	with WF_error _ -> "", false in
-      let html_bgcolor, _ =
-	try (self # node # dtd # par_entity "readme:html:bgcolor")
-            # replacement_text
-	with WF_error _ -> "white", false in
-      let html_textcolor, _ =
-	try (self # node # dtd # par_entity "readme:html:textcolor")
-            # replacement_text
-	with WF_error _ -> "", false in
-      let html_alinkcolor, _ =
-	try (self # node # dtd # par_entity "readme:html:alinkcolor")
-            # replacement_text
-	with WF_error _ -> "", false in
-      let html_vlinkcolor, _ =
-	try (self # node # dtd # par_entity "readme:html:vlinkcolor")
-            # replacement_text
-	with WF_error _ -> "", false in
-      let html_linkcolor, _ =
-	try (self # node # dtd # par_entity "readme:html:linkcolor")
-            # replacement_text
-	with WF_error _ -> "", false in
-      let html_background, _ =
-	try (self # node # dtd # par_entity "readme:html:background")
-            # replacement_text
-	with WF_error _ -> "", false in
-
-      output_string ch "<html><header><title>\n";
-      output_string ch (escape_html title);
-      output_string ch "</title></header>\n";
-      output_string ch "<body ";
-      List.iter
-	(fun (name,value) ->
-	   if value <> "" then 
-	     output_string ch (name ^ "=\"" ^ escape_html value ^ "\" "))
-	[ "bgcolor",    html_bgcolor;
-	  "text",       html_textcolor;
-	  "link",       html_linkcolor;
-	  "alink",      html_alinkcolor;
-	  "vlink",      html_vlinkcolor;
-	];
-      output_string ch ">\n";
-      output_string ch html_header;
-      output_string ch "<h1>";
-      output_string ch (escape_html title);
-      output_string ch "</h1>\n";
-      (* process main content: *)
-      List.iter
-	(fun n -> n # extension # to_html store ch)
-	(self # node # sub_nodes);
-      (* now process footnotes *)
-      store # print_footnotes ch;
-      (* trailer *)
-      output_string ch html_trailer;
-      output_string ch "</html>\n";
-
-  end
-;;

2.4.8. Classes section, sect1, -sect2, and sect3

As the conversion process is very similar, the conversion classes of the three -section levels are derived from the more general section -class. The HTML code of the section levels only differs in the type of the -headline, and because of this the classes describing the section levels can be -computed by replacing the class argument the_tag of -section by the HTML name of the headline tag.

Section elements are converted to HTML by printing a headline and then -converting the contents of the element recursively. More precisely, the first -sub-element is always a title element, and the other -elements are the contents of the section. This structure is declared in the -DTD, and it is guaranteed that the document matches the DTD. Because of this -the title node can be separated from the rest without any checks.

Both the title node, and the body nodes are then converted to HTML by calling -to_html on them.

class section the_tag =
-  object (self)
-    inherit shared
-
-    val tag = the_tag
-
-    method to_html store ch =
-      let sub_nodes = self # node # sub_nodes in
-      match sub_nodes with
-	  title_node :: rest ->
-	    output_string ch ("<" ^ tag ^ ">\n");
-	    title_node # extension # to_html store ch;
-	    output_string ch ("\n</" ^ tag ^ ">");
-	    List.iter
-	      (fun n -> n # extension # to_html store ch)
-	      rest
-	| _ ->
-	    assert false
-  end
-;;
-
-class sect1 = section "h1";;
-class sect2 = section "h3";;
-class sect3 = section "h4";;

2.4.9. Classes map_tag, p, -em, ul, li

Several element types are converted to HTML by simply mapping them to -corresponding HTML element types. The class map_tag -implements this, and the class argument the_target_tag -determines the tag name to map to. The output consists of the start tag, the -recursively converted inner elements, and the end tag. - -

class map_tag the_target_tag =
-  object (self)
-    inherit shared
-
-    val target_tag = the_target_tag
-
-    method to_html store ch =
-      output_string ch ("<" ^ target_tag ^ ">\n");
-      List.iter
-	(fun n -> n # extension # to_html store ch)
-	(self # node # sub_nodes);
-      output_string ch ("\n</" ^ target_tag ^ ">");
-  end
-;;
-
-class p = map_tag "p";;
-class em = map_tag "b";;
-class ul = map_tag "ul";;
-class li = map_tag "li";;

2.4.10. Class br

Element of type br are mapped to the same HTML type. Note -that HTML forbids the end tag of br. - -

class br =
-  object (self)
-    inherit shared
-
-    method to_html store ch =
-      output_string ch "<br>\n";
-      List.iter
-	(fun n -> n # extension # to_html store ch)
-	(self # node # sub_nodes);
-  end
-;;

2.4.11. Class code

The code type is converted to a pre -section (preformatted text). As the meaning of tabs is unspecified in HTML, -tabs are expanded to spaces. - -

class code =
-  object (self)
-    inherit shared
-
-    method to_html store ch =
-      let data = self # node # data in
-      (* convert tabs *)
-      let l = String.length data in
-      let rec preprocess i column =
-	(* this is very ineffective but comprehensive: *)
-	if i < l then
-	  match data.[i] with
-	      '\t' ->
-		let n = 8 - (column mod 8) in
-		String.make n ' ' ^ preprocess (i+1) (column + n)
-	    | '\n' ->
-		"\n" ^ preprocess (i+1) 0
-	    | c ->
-		String.make 1 c ^ preprocess (i+1) (column + 1)
-	else
-	  ""
-      in
-      output_string ch "<p><pre>";
-      output_string ch (escape_html (preprocess 0 0));
-      output_string ch "</pre></p>";
-
-  end
-;;

2.4.12. Class a

Hyperlinks, expressed by the a element type, are converted -to the HTML a type. If the target of the hyperlink is given -by href, the URL of this attribute can be used -directly. Alternatively, the target can be given by -readmeref in which case the ".html" suffix must be added to -the file name.

Note that within a only #PCDATA is allowed, so the contents -can be converted directly by applying escape_html to the -character data contents. - -

class a =
-  object (self)
-    inherit shared
-
-    method to_html store ch =
-      output_string ch "<a ";
-      let href =
-	match self # node # attribute "href" with
-	    Value v -> escape_html v
-	  | Valuelist _ -> assert false
-	  | Implied_value ->
-	      begin match self # node # attribute "readmeref" with
-		  Value v -> escape_html v ^ ".html"
-		| Valuelist _ -> assert false
-		| Implied_value ->
-		    ""
-	      end
-      in
-      if href <> "" then
-	output_string ch ("href=\""  ^ href ^ "\"");
-      output_string ch ">";
-      output_string ch (escape_html (self # node # data));
-      output_string ch "</a>";
-	
-  end
-;;

2.4.13. Class footnote

The footnote class has two methods: -to_html to convert the footnote reference to HTML, and -footnote_to_html to convert the footnote text itself.

The footnote reference is converted to a local hyperlink; more precisely, to -two anchor tags which are connected with each other. The text anchor points to -the footnote anchor, and the footnote anchor points to the text anchor.

The footnote must be allocated in the store object. By -allocating the footnote, you get the number of the footnote, and the text of -the footnote is stored until the end of the HTML page is reached when the -footnotes can be printed. The to_html method stores simply -the object itself, such that the footnote_to_html method is -invoked on the same object that encountered the footnote.

The to_html only allocates the footnote, and prints the -reference anchor, but it does not print nor convert the contents of the -note. This is deferred until the footnotes actually get printed, i.e. the -recursive call of to_html on the sub nodes is done by -footnote_to_html.

Note that this technique does not work if you make another footnote within a -footnote; the second footnote gets allocated but not printed.

class footnote =
-  object (self)
-    inherit shared
-
-    val mutable footnote_number = 0
-
-    method to_html store ch =
-      let number = 
-	store # alloc_footnote (self : #shared :> footnote_printer) in
-      let foot_anchor = 
-	"footnote" ^ string_of_int number in
-      let text_anchor =
-	"textnote" ^ string_of_int number in
-      footnote_number <- number;
-      output_string ch ( "<a name=\"" ^ text_anchor ^ "\" href=\"#" ^ 
-			 foot_anchor ^ "\">[" ^ string_of_int number ^ 
-			 "]</a>" )
-
-    method footnote_to_html store ch =
-      (* prerequisite: we are in a definition list <dl>...</dl> *)
-      let foot_anchor = 
-	"footnote" ^ string_of_int footnote_number in
-      let text_anchor =
-	"textnote" ^ string_of_int footnote_number in
-      output_string ch ("<dt><a name=\"" ^ foot_anchor ^ "\" href=\"#" ^ 
-			text_anchor ^ "\">[" ^ string_of_int footnote_number ^ 
-			"]</a></dt>\n<dd>");
-      List.iter
-	(fun n -> n # extension # to_html store ch)
-	(self # node # sub_nodes);
-      output_string ch ("\n</dd>")
- 
-  end
-;;

2.4.14. The specification of the document model

This code sets up the hash table that connects element types with the exemplars -of the extension classes that convert the elements to HTML. - -

open Pxp_yacc
-
-let tag_map =
-  make_spec_from_alist
-    ~data_exemplar:(new data_impl (new only_data))
-    ~default_element_exemplar:(new element_impl (new no_markup))
-    ~element_alist:
-      [ "readme", (new element_impl (new readme));
-	"sect1",  (new element_impl (new sect1));
-	"sect2",  (new element_impl (new sect2));
-	"sect3",  (new element_impl (new sect3));
-	"title",  (new element_impl (new no_markup));
-	"p",      (new element_impl (new p));
-	"br",     (new element_impl (new br));
-	"code",   (new element_impl (new code));
-	"em",     (new element_impl (new em));
-	"ul",     (new element_impl (new ul));
-	"li",     (new element_impl (new li));
-	"footnote", (new element_impl (new footnote : #shared :> shared));
-	"a",      (new element_impl (new a));
-      ]
-    ()
-;;


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Class-based processing of the node treeUpThe objects representing the document
\ No newline at end of file diff --git a/helm/DEVEL/pxp/pxp/doc/manual/html/x939.html b/helm/DEVEL/pxp/pxp/doc/manual/html/x939.html deleted file mode 100644 index cf177f88e..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/html/x939.html +++ /dev/null @@ -1,2337 +0,0 @@ -The class type node
The PXP user's guide
PrevChapter 3. The objects representing the documentNext

3.2. The class type node

From Pxp_document: - -

type node_type =
-  T_data
-| T_element of string
-| T_super_root
-| T_pinstr of string
-| T_comment
-and some other, reserved types
-;;
-
-class type [ 'ext ] node =
-  object ('self)
-    constraint 'ext = 'ext node #extension
-
-    (* General observers *)
-
-    method extension : 'ext
-    method dtd : dtd
-    method parent : 'ext node
-    method root : 'ext node
-    method sub_nodes : 'ext node list
-    method iter_nodes : ('ext node -> unit) -> unit
-    method iter_nodes_sibl : 
-           ('ext node option -> 'ext node -> 'ext node option -> unit) -> unit
-    method node_type : node_type
-    method encoding : Pxp_types.rep_encoding
-    method data : string
-    method position : (string * int * int)
-    method comment : string option
-    method pinstr : string -> proc_instruction list
-    method pinstr_names : string list
-    method write : Pxp_types.output_stream -> Pxp_types.encoding -> unit
-
-    (* Attribute observers *)
-
-    method attribute : string -> Pxp_types.att_value
-    method required_string_attribute : string -> string
-    method optional_string_attribute : string -> string option
-    method required_list_attribute : string -> string list
-    method optional_list_attribute : string -> string list
-    method attribute_names : string list
-    method attribute_type : string -> Pxp_types.att_type
-    method attributes : (string * Pxp_types.att_value) list
-    method id_attribute_name : string
-    method id_attribute_value : string
-    method idref_attribute_names : string
-
-    (* Modifying methods *)
-
-    method add_node : ?force:bool -> 'ext node -> unit
-    method add_pinstr : proc_instruction -> unit
-    method delete : unit
-    method set_nodes : 'ext node list -> unit
-    method quick_set_attributes : (string * Pxp_types.att_value) list -> unit
-    method set_comment : string option -> unit
-
-    (* Cloning methods *)
-
-    method orphaned_clone : 'self
-    method orphaned_flat_clone : 'self
-    method create_element : 
-              ?position:(string * int * int) ->
-              dtd -> node_type -> (string * string) list ->
-                  'ext node
-    method create_data : dtd -> string -> 'ext node
-    method keep_always_whitespace_mode : unit
-
-    (* Validating methods *)
-
-    method local_validate : ?use_dfa:bool -> unit -> unit
-
-    (* ... Internal methods are undocumented. *)
-
-  end
-;;
- -In the module Pxp_types you can find another type -definition that is important in this context: - -
type Pxp_types.att_value =
-    Value     of string
-  | Valuelist of string list
-  | Implied_value
-;;

3.2.1. The structure of document trees

A node represents either an element or a character data section. There are two -classes implementing the two aspects of nodes: element_impl -and data_impl. The latter class does not implement all -methods because some methods do not make sense for data nodes.

(Note: PXP also supports a mode which forces that processing instructions and -comments are represented as nodes of the document tree. However, these nodes -are instances of element_impl with node types -T_pinstr and T_comment, -respectively. This mode must be explicitly configured; the basic representation -knows only element and data nodes.)

The following figure -(A tree with element nodes, data nodes, and attributes) shows an example how -a tree is constructed from element and data nodes. The circular areas -represent element nodes whereas the ovals denote data nodes. Only elements -may have subnodes; data nodes are always leaves of the tree. The subnodes -of an element can be either element or data nodes; in both cases the O'Caml -objects storing the nodes have the class type node.

Attributes (the clouds in the picture) are not directly -integrated into the tree; there is always an extra link to the attribute -list. This is also true for processing instructions (not shown in the -picture). This means that there are separated access methods for attributes and -processing instructions.

Figure 3-1. A tree with element nodes, data nodes, and attributes

Only elements, data sections, attributes and processing -instructions (and comments, if configured) can, directly or indirectly, occur -in the document tree. It is impossible to add entity references to the tree; if -the parser finds such a reference, not the reference as such but the referenced -text (i.e. the tree representing the structured text) is included in the -tree.

Note that the parser collapses as much data material into one -data node as possible such that there are normally never two adjacent data -nodes. This invariant is enforced even if data material is included by entity -references or CDATA sections, or if a data sequence is interrupted by -comments. So a &amp; b <-- comment --> c <![CDATA[ -<> d]]> is represented by only one data node, for -instance. However, you can create document trees manually which break this -invariant; it is only the way the parser forms the tree.

Figure 3-2. Nodes are doubly linked trees

The node tree has links in both directions: Every node has a link to its parent -(if any), and it has links to the subnodes (see -figure Nodes are doubly linked trees). Obviously, -this doubly-linked structure simplifies the navigation in the tree; but has -also some consequences for the possible operations on trees.

Because every node must have at most one parent node, -operations are illegal if they violate this condition. The following figure -(A node can only be added if it is a root) shows on the left side -that node y is added to x as new subnode -which is allowed because y does not have a parent yet. The -right side of the picture illustrates what would happen if y -had a parent node; this is illegal because y would have two -parents after the operation.

Figure 3-3. A node can only be added if it is a root

The "delete" operation simply removes the links between two nodes. In the -picture (A deleted node becomes the root of the subtree) the node -x is deleted from the list of subnodes of -y. After that, x becomes the root of the -subtree starting at this node.

Figure 3-4. A deleted node becomes the root of the subtree

It is also possible to make a clone of a subtree; illustrated in -The clone of a subtree. In this case, the -clone is a copy of the original subtree except that it is no longer a -subnode. Because cloning never keeps the connection to the parent, the clones -are called orphaned.

Figure 3-5. The clone of a subtree

3.2.2. The methods of the class type node

General observers - .

  • extension: The reference to the extension object which -belongs to this node (see ...).

  • dtd: Returns a reference to the global DTD. All nodes -of a tree must share the same DTD.

  • parent: Get the father node. Raises -Not_found in the case the node does not have a -parent, i.e. the node is the root.

  • root: Gets the reference to the root node of the tree. -Every node is contained in a tree with a root, so this method always -succeeds. Note that this method searches the root, -which costs time proportional to the length of the path to the root.

  • sub_nodes: Returns references to the children. The returned -list reflects the order of the children. For data nodes, this method returns -the empty list.

  • iter_nodes f: Iterates over the children, and calls -f for every child in turn.

  • iter_nodes_sibl f: Iterates over the children, and calls -f for every child in turn. f gets as -arguments the previous node, the current node, and the next node.

  • node_type: Returns either T_data which -means that the node is a data node, or T_element n -which means that the node is an element of type n. -If configured, possible node types are also T_pinstr t -indicating that the node represents a processing instruction with target -t, and T_comment in which case the node -is a comment.

  • encoding: Returns the encoding of the strings.

  • data: Returns the character data of this node and all -children, concatenated as one string. The encoding of the string is what -the method encoding returns. -- For data nodes, this method simply returns the represented characters. -For elements, the meaning of the method has been extended such that it -returns something useful, i.e. the effectively contained characters, without -markup. (For T_pinstr and T_comment -nodes, the method returns the empty string.)

  • position: If configured, this method returns the position of -the element as triple (entity, line, byteposition). For data nodes, the -position is not stored. If the position is not available the triple -"?", 0, 0 is returned.

  • comment: Returns Some text for comment -nodes, and None for other nodes. The text -is everything between the comment delimiters <-- and --->.

  • pinstr n: Returns all processing instructions that are -directly contained in this element and that have a target -specification of n. The target is the first word after -the <?.

  • pinstr_names: Returns the list of all targets of processing -instructions directly contained in this element.

  • write s enc: Prints the node and all subnodes to the passed -output stream as valid XML text, using the passed external encoding.

-

Attribute observers - .

  • attribute n: Returns the value of the attribute with name -n. This method returns a value for every declared -attribute, and it raises Not_found for any undeclared -attribute. Note that it even returns a value if the attribute is actually -missing but is declared as #IMPLIED or has a default -value. - Possible values are: -

    • Implied_value: The attribute has been declared with the -keyword #IMPLIED, and the attribute is missing in the -attribute list of this element.

    • Value s: The attribute has been declared as type -CDATA, as ID, as -IDREF, as ENTITY, or as -NMTOKEN, or as enumeration or notation, and one of the two -conditions holds: (1) The attribute value is present in the attribute list in -which case the value is returned in the string s. (2) The -attribute has been omitted, and the DTD declared the attribute with a default -value. The default value is returned in s. -- Summarized, Value s is returned for non-implied, non-list -attribute values.

    • Valuelist l: The attribute has been declared as type -IDREFS, as ENTITIES, or -as NMTOKENS, and one of the two conditions holds: (1) The -attribute value is present in the attribute list in which case the -space-separated tokens of the value are returned in the string list -l. (2) The attribute has been omitted, and the DTD declared -the attribute with a default value. The default value is returned in -l. -- Summarized, Valuelist l is returned for all list-type -attribute values.

    - -Note that before the attribute value is returned, the value is normalized. This -means that newlines are converted to spaces, and that references to character -entities (i.e. &#n;) and -general entities -(i.e. &name;) are expanded; -if necessary, expansion is performed recursively.

    In well-formedness mode, there is no DTD which could declare an -attribute. Because of this, every occuring attribute is considered as a CDATA -attribute.

  • required_string_attribute n: returns the Value attribute -called n, or the Valuelist attribute as a string where the list elements -are separated by spaces. If the attribute value is implied, or if the -attribute does not exists, the method will fail. - This method is convenient -if you expect a non-implied and non-list attribute value.

  • optional_string_attribute n: returns the Value attribute -called n, or the Valuelist attribute as a string where the list elements -are separated by spaces. If the attribute value is implied, or if the -attribute does not exists, the method returns None. - This method is -convenient if you expect a non-list attribute value including the implied -value.

  • required_list_attribute n: returns the Valuelist attribute -called n, or the Value attribute as a list with a single element. -If the attribute value is implied, or if the -attribute does not exists, the method will fail. - This method is -convenient if you expect a list attribute value.

  • optional_list_attribute n: returns the Valuelist attribute -called n, or the Value attribute as a list with a single element. -If the attribute value is implied, or if the -attribute does not exists, an empty list will be returned. - This method -is convenient if you expect a list attribute value or the implied value.

  • attribute_names: returns the list of all attribute names of -this element. As this is a validating parser, this list is equal to the -list of declared attributes.

  • attribute_type n: returns the type of the attribute called -n. See the module Pxp_types for a -description of the encoding of the types.

  • attributes: returns the list of pairs of names and values -for all attributes of -this element.

  • id_attribute_name: returns the name of the attribute that is -declared with type ID. There is at most one such attribute. The method raises -Not_found if there is no declared ID attribute for the -element type.

  • id_attribute_value: returns the value of the attribute that -is declared with type ID. There is at most one such attribute. The method raises -Not_found if there is no declared ID attribute for the -element type.

  • idref_attribute_names: returns the list of attribute names -that are declared as IDREF or IDREFS.

-

Modifying methods - . The following methods are only defined for element nodes (more exactly: -the methods are defined for data nodes, too, but fail always). - -

  • add_node sn: Adds sub node sn to the list -of children. This operation is illustrated in the picture -A node can only be added if it is a root. This method expects that -sn is a root, and it requires that sn and -the current object share the same DTD.

    Because add_node is the method the parser itself uses -to add new nodes to the tree, it performs by default some simple validation -checks: If the content model is a regular expression, it is not allowed to add -data nodes to this node unless the new nodes consist only of whitespace. In -this case, the new data nodes are silently dropped (you can change this by -invoking keep_always_whitespace_mode).

    If the document is flagged as stand-alone, these data nodes only -containing whitespace are even forbidden if the element declaration is -contained in an external entity. This case is detected and rejected.

    If the content model is EMPTY, it is not allowed to -add any data node unless the data node is empty. In this case, the new data -node is silently dropped.

    These checks only apply if there is a DTD. In well-formedness mode, it is -assumed that every element is declared with content model -ANY which prohibits any validation check. Furthermore, you -turn these checks off by passing ~force:true as first -argument.

  • add_pinstr pi: Adds the processing instruction -pi to the list of processing instructions.

  • delete: Deletes this node from the tree. After this -operation, this node is no longer the child of the former father node; and the -node loses the connection to the father as well. This operation is illustrated -by the figure A deleted node becomes the root of the subtree.

  • set_nodes nl: Sets the list of children to -nl. It is required that every member of nl -is a root, and that all members and the current object share the same DTD. -Unlike add_node, no validation checks are performed.

  • quick_set_attributes atts: sets the attributes of this -element to atts. It is not checked -whether atts matches the DTD or not; it is up to the -caller of this method to ensure this. (This method may be useful to transform -the attribute values, i.e. apply a mapping to every attribute.)

  • set_comment text: This method is only applicable to -T_comment nodes; it sets the comment text contained by such -nodes.

Cloning methods - .

  • orphaned_clone: Returns a clone of the node and the complete -tree below this node (deep clone). The clone does not have a parent (i.e. the -reference to the parent node is not cloned). While -copying the subtree, strings are skipped; it is likely that the original tree -and the copy tree share strings. Extension objects are cloned by invoking -the clone method on the original objects; how much of -the extension objects is cloned depends on the implemention of this method.

    This operation is illustrated by the figure -The clone of a subtree.

  • orphaned_flat_clone: Returns a clone of the node, -but sets the list of sub nodes to [], i.e. the sub nodes are not cloned.

  • -create_element dtd nt al: Returns a flat copy of this node -(which must be an element) with the following modifications: The DTD is set to -dtd; the node type is set to nt, and the -new attribute list is set to al (given as list of -(name,value) pairs). The copy does not have children nor a parent. It does not -contain processing instructions. See -the example below.

    Note that you can specify the position of the new node -by the optional argument ~position.

  • -create_data dtd cdata: Returns a flat copy of this node -(which must be a data node) with the following modifications: The DTD is set to -dtd; the node type is set to T_data; the -attribute list is empty (data nodes never have attributes); the list of -children and PIs is empty, too (same reason). The new node does not have a -parent. The value cdata is the new character content of the -node. See -the example below.

  • keep_always_whitespace_mode: Even data nodes which are -normally dropped because they only contain ignorable whitespace, can added to -this node once this mode is turned on. (This mode is useful to produce -canonical XML.)

Validating methods - . There is one method which locally validates the node, i.e. checks whether the -subnodes match the content model of this node. - -

  • local_validate: Checks that this node conforms to the -DTD by comparing the type of the subnodes with the content model for this -node. (Applications need not call this method unless they add new nodes -themselves to the tree.)

3.2.3. The class element_impl

This class is an implementation of node which -realizes element nodes: - -

class [ 'ext ] element_impl : 'ext -> [ 'ext ] node

Constructor. You can create a new instance by - -

new element_impl extension_object
- -which creates a special form of empty element which already contains a -reference to the extension_object, but is -otherwise empty. This special form is called an -exemplar. The purpose of exemplars is that they serve as -patterns that can be duplicated and filled with data. The method -create_element is designed to perform this action.

Example. First, create an exemplar by - -

let exemplar_ext = ... in
-let exemplar     = new element_impl exemplar_ext in
- -The exemplar is not used in node trees, but only as -a pattern when the element nodes are created: - -
let element = exemplar # create_element dtd (T_element name) attlist 
- -The element is a copy of exemplar -(even the extension exemplar_ext has been copied) -which ensures that element and its extension are objects -of the same class as the exemplars; note that you need not to pass a -class name or other meta information. The copy is initially connected -with the dtd, it gets a node type, and the attribute list -is filled. The element is now fully functional; it can -be added to another element as child, and it can contain references to -subnodes.

3.2.4. The class data_impl

This class is an implementation of node which -should be used for all character data nodes: - -

class [ 'ext ] data_impl : 'ext -> [ 'ext ] node

Constructor. You can create a new instance by - -

new data_impl extension_object
- -which creates an empty exemplar node which is connected to -extension_object. The node does not contain a -reference to any DTD, and because of this it cannot be added to node trees.

To get a fully working data node, apply the method -create_data to the exemplar (see example).

Example. First, create an exemplar by - -

let exemplar_ext = ... in
-let exemplar     = new exemplar_ext data_impl in
- -The exemplar is not used in node trees, but only as -a pattern when the data nodes are created: - -
let data_node = exemplar # create_data dtd "The characters contained in the data node" 
- -The data_node is a copy of exemplar. -The copy is initially connected -with the dtd, and it is filled with character material. -The data_node is now fully functional; it can -be added to an element as child.

3.2.5. The type spec

The type spec defines a way to handle the details of -creating nodes from exemplars. - -

type 'ext spec
-constraint 'ext = 'ext node #extension
-
-val make_spec_from_mapping :
-      ?super_root_exemplar : 'ext node ->
-      ?comment_exemplar : 'ext node ->
-      ?default_pinstr_exemplar : 'ext node ->
-      ?pinstr_mapping : (string, 'ext node) Hashtbl.t ->
-      data_exemplar: 'ext node ->
-      default_element_exemplar: 'ext node ->
-      element_mapping: (string, 'ext node) Hashtbl.t -> 
-      unit -> 
-        'ext spec
-
-val make_spec_from_alist :
-      ?super_root_exemplar : 'ext node ->
-      ?comment_exemplar : 'ext node ->
-      ?default_pinstr_exemplar : 'ext node ->
-      ?pinstr_alist : (string * 'ext node) list ->
-      data_exemplar: 'ext node ->
-      default_element_exemplar: 'ext node ->
-      element_alist: (string * 'ext node) list -> 
-      unit -> 
-        'ext spec
- -The two functions make_spec_from_mapping and -make_spec_from_alist create spec -values. Both functions are functionally equivalent and the only difference is -that the first function prefers hashtables and the latter associative lists to -describe mappings from names to exemplars.

You can specify exemplars for the various kinds of nodes that need to be -generated when an XML document is parsed: - -

  • ~super_root_exemplar: This exemplar -is used to create the super root. This special node is only created if the -corresponding configuration option has been selected; it is the parent node of -the root node which may be convenient if every working node must have a parent.

  • ~comment_exemplar: This exemplar is -used when a comment node must be created. Note that such nodes are only created -if the corresponding configuration option is "on".

  • ~default_pinstr_exemplar: If a node -for a processing instruction must be created, and the instruction is not listed -in the table passed by ~pinstr_mapping or -~pinstr_alist, this exemplar is used. -Again the configuration option must be "on" in order to create such nodes at -all.

  • ~pinstr_mapping or -~pinstr_alist: Map the target names of processing -instructions to exemplars. These mappings are only used when nodes for -processing instructions are created.

  • ~data_exemplar: The exemplar for -ordinary data nodes.

  • ~default_element_exemplar: This -exemplar is used if an element node must be created, but the element type -cannot be found in the tables element_mapping or -element_alist.

  • ~element_mapping or -~element_alist: Map the element types to exemplars. These -mappings are used to create element nodes.

- -In most cases, you only want to create spec values to pass -them to the parser functions found in Pxp_yacc. However, it -might be useful to apply spec values directly.

The following functions create various types of nodes by selecting the -corresponding exemplar from the passed spec value, and by -calling create_element or create_data on -the exemplar. - -

val create_data_node : 
-      'ext spec -> 
-      dtd -> 
-      (* data material: *) string -> 
-          'ext node
-
-val create_element_node : 
-      ?position:(string * int * int) ->
-      'ext spec -> 
-      dtd -> 
-      (* element type: *) string -> 
-      (* attributes: *) (string * string) list -> 
-          'ext node
-
-val create_super_root_node :
-      ?position:(string * int * int) ->
-      'ext spec -> 
-       dtd -> 
-           'ext node
-
-val create_comment_node :
-      ?position:(string * int * int) ->
-      'ext spec -> 
-      dtd -> 
-      (* comment text: *) string -> 
-          'ext node
-
-val create_pinstr_node :
-      ?position:(string * int * int) ->
-      'ext spec -> 
-      dtd -> 
-      proc_instruction -> 
-          'ext node

3.2.6. Examples

Building trees. Here is the piece of code that creates the tree of -the figure A tree with element nodes, data nodes, and attributes. The extension -object and the DTD are beyond the scope of this example. - -

let exemplar_ext = ... (* some extension *) in
-let dtd = ... (* some DTD *) in
-
-let element_exemplar = new element_impl exemplar_ext in
-let data_exemplar    = new data_impl    exemplar_ext in
-
-let a1 = element_exemplar # create_element dtd (T_element "a") ["att", "apple"]
-and b1 = element_exemplar # create_element dtd (T_element "b") []
-and c1 = element_exemplar # create_element dtd (T_element "c") []
-and a2 = element_exemplar # create_element dtd (T_element "a") ["att", "orange"]
-in
-
-let cherries = data_exemplar # create_data dtd "Cherries" in
-let orange   = data_exemplar # create_data dtd "An orange" in
-
-a1 # add_node b1;
-a1 # add_node c1;
-b1 # add_node a2;
-b1 # add_node cherries;
-a2 # add_node orange;
- -Alternatively, the last block of statements could also be written as: - -
a1 # set_nodes [b1; c1];
-b1 # set_nodes [a2; cherries];
-a2 # set_nodes [orange];
- -The root of the tree is a1, i.e. it is true that - -
x # root == a1
- -for every x from { a1, a2, -b1, c1, cherries, -orange }.

Furthermore, the following properties hold: - -

  a1 # attribute "att" = Value "apple"
-& a2 # attribute "att" = Value "orange"
-
-& cherries # data = "Cherries"
-&   orange # data = "An orange"
-&       a1 # data = "CherriesAn orange"
-
-&       a1 # node_type = T_element "a"
-&       a2 # node_type = T_element "a"
-&       b1 # node_type = T_element "b"
-&       c1 # node_type = T_element "c"
-& cherries # node_type = T_data
-&   orange # node_type = T_data
-
-&       a1 # sub_nodes = [ b1; c1 ]
-&       a2 # sub_nodes = [ orange ]
-&       b1 # sub_nodes = [ a2; cherries ]
-&       c1 # sub_nodes = []
-& cherries # sub_nodes = []
-&   orange # sub_nodes = []
-
-&       a2 # parent == a1
-&       b1 # parent == b1
-&       c1 # parent == a1
-& cherries # parent == b1
-&   orange # parent == a2

Searching nodes. The following function searches all nodes of a tree -for which a certain condition holds: - -

let rec search p t =
-  if p t then
-    t :: search_list p (t # sub_nodes)
-  else
-    search_list p (t # sub_nodes)
-
-and search_list p l =
-  match l with
-    []      -> []
-  | t :: l' -> (search p t) @ (search_list p l')
-;;

For example, if you want to search all elements of a certain -type et, the function search can be -applied as follows: - -

let search_element_type et t =
-  search (fun x -> x # node_type = T_element et) t
-;;

Getting attribute values. Suppose we have the declaration: - -

<!ATTLIST e a CDATA #REQUIRED
-            b CDATA #IMPLIED
-            c CDATA "12345">
- -In this case, every element e must have an attribute -a, otherwise the parser would indicate an error. If -the O'Caml variable n holds the node of the tree -corresponding to the element, you can get the value of the attribute -a by - -
let value_of_a = n # required_string_attribute "a"
- -which is more or less an abbreviation for - -
let value_of_a = 
-  match n # attribute "a" with
-    Value s -> s
-  | _       -> assert false
- -- as the attribute is required, the attribute method always -returns a Value.

In contrast to this, the attribute b can be -omitted. In this case, the method required_string_attribute -works only if the attribute is there, and the method will fail if the attribute -is missing. To get the value, you can apply the method -optional_string_attribute: - -

let value_of_b = n # optional_string_attribute "b"
- -Now, value_of_b is of type string option, -and None represents the omitted attribute. Alternatively, -you could also use attribute: - -
let value_of_b = 
-  match n # attribute "b" with
-    Value s       -> Some s
-  | Implied_value -> None
-  | _             -> assert false

The attribute c behaves much like -a, because it has always a value. If the attribute is -omitted, the default, here "12345", will be returned instead. Because of this, -you can again use required_string_attribute to get the -value.

The type CDATA is the most general string -type. The types NMTOKEN, ID, -IDREF, ENTITY, and all enumerators and -notations are special forms of string types that restrict the possible -values. From O'Caml, they behave like CDATA, i.e. you can -use the methods required_string_attribute and -optional_string_attribute, too.

In contrast to this, the types NMTOKENS, -IDREFS, and ENTITIES mean lists of -strings. Suppose we have the declaration: - -

<!ATTLIST f d NMTOKENS #REQUIRED
-            e NMTOKENS #IMPLIED>
- -The type NMTOKENS stands for lists of space-separated -tokens; for example the value "1 abc 23ef" means the list -["1"; "abc"; "23ef"]. (Again, IDREFS -and ENTITIES have more restricted values.) To get the -value of attribute d, one can use - -
let value_of_d = n # required_list_attribute "d"
- -or - -
let value_of_d = 
-  match n # attribute "d" with
-    Valuelist l -> l
-  | _           -> assert false
- -As d is required, the attribute cannot be omitted, and -the attribute method returns always a -Valuelist.

For optional attributes like e, apply - -

let value_of_e = n # optional_list_attribute "e"
- -or - -
let value_of_e = 
-  match n # attribute "e" with
-    Valuelist l   -> l
-  | Implied_value -> []
-  | _             -> assert false
- -Here, the case that the attribute is missing counts like the empty list.

3.2.7. Iterators

There are also several iterators in Pxp_document; please see -the mli file for details. You can find examples for them in the -"simple_transformation" directory. - -

val find : ?deeply:bool -> 
-           f:('ext node -> bool) -> 'ext node -> 'ext node
-
-val find_all : ?deeply:bool ->
-               f:('ext node -> bool) -> 'ext node -> 'ext node list
-
-val find_element : ?deeply:bool ->
-                   string -> 'ext node -> 'ext node
-
-val find_all_elements : ?deeply:bool ->
-                        string -> 'ext node -> 'ext node list
-
-exception Skip
-val map_tree :  pre:('exta node -> 'extb node) ->
-               ?post:('extb node -> 'extb node) ->
-               'exta node -> 
-                   'extb node
-
-
-val map_tree_sibl : 
-        pre: ('exta node option -> 'exta node -> 'exta node option -> 
-                  'extb node) ->
-       ?post:('extb node option -> 'extb node -> 'extb node option -> 
-                  'extb node) ->
-       'exta node -> 
-           'extb node
-
-val iter_tree : ?pre:('ext node -> unit) ->
-                ?post:('ext node -> unit) ->
-                'ext node -> 
-                    unit
-
-val iter_tree_sibl :
-       ?pre: ('ext node option -> 'ext node -> 'ext node option -> unit) ->
-       ?post:('ext node option -> 'ext node -> 'ext node option -> unit) ->
-       'ext node -> 
-           unit


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-b(supports)e(an)i(object-oriented)c(access)k(layer)e(specially)-5 -b(.)p Black 3842 5278 a Fr(9)p Black eop -%%Page: 10 10 -10 9 bop Black 3028 67 a Fr(Chapter)19 b(1.)h(What)h(is)g(XML?)p -Black -2 583 a Fp(1.1.3.)35 b(Discussion)396 751 y Fv(As)21 -b(we)g(ha)n(v)o(e)e(seen,)h(there)g(are)g(tw)o(o)h(le)n(v)o(els)f(of)g -(description:)f(On)h(the)g(one)g(hand,)f(XML)h(can)g(de\002ne)f(rules)i -(about)e(the)396 859 y(format)g(of)h(a)h(document)d(\(the)i(DTD\),)g -(on)f(the)i(other)e(hand,)g(XML)h(e)o(xpresses)g(structured)f -(documents.)f(There)h(are)h(a)396 967 y(number)f(of)h(possible)f -(applications:)p Black 396 1199 a Ft(\225)p Black 60 -w Fv(XML)i(can)f(be)g(used)g(to)g(e)o(xpress)f(structured)g(te)o(xts.)h -(Unlik)o(e)g(HTML,)g(there)g(is)h(no)e(canonical)g(interpretation;)g -(one)479 1307 y(w)o(ould)h(ha)n(v)o(e)f(to)i(write)f(a)h(back)o(end)d -(for)i(the)g(DTD)g(that)h(translates)f(the)g(structured)f(te)o(xts)h -(into)g(a)h(format)e(that)479 1415 y(e)o(xisting)h(bro)n(wsers,)f 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Fr(Chapter)19 b(1.)h(What)h(is)g(XML?)p -Black 396 579 a Fv(applies)f(to)h(single)f(quotes.)f(Y)-9 -b(ou)20 b(can)g(generally)e(not)i(use)g Fm(<)h Fv(and)e(&)i(as)g -(characters)e(in)h(attrib)n(ute)g(v)n(alues.)g(It)g(is)396 -687 y(possible)g(to)h(include)e(the)h(paraphrases)e(<,)j(>,)f -(&,)f(',)g(and)h(")f(\(and)g(an)o(y)g(other)h(reference)e -(to)j(a)396 795 y(general)e(entity)h(as)h(long)f(as)g(the)h(entity)f -(is)h(not)e(de\002ned)h(by)f(an)i(e)o(xternal)d(\002le\))j(as)g(well)g -(as)g(&#)p Fl(n)p Fv(;.)396 944 y(Before)f(you)f(can)h(use)h(an)f -(attrib)n(ute)g(you)f(must)h(declare)g(it.)g(An)g(A)-9 -b(TTLIST)20 b(declaration)e(looks)i(as)h(follo)n(ws:)396 -1124 y Fo(<)p Fq(!ATTLIST)43 b Fn(element-name)845 1222 -y(attribute-name)f(attribute-type)h(attribute-default)845 -1319 y Fq(...)845 1416 y Fn(attribute-name)f(attribute-type)h -(attribute-default)396 1513 y Fo(>)396 1704 y Fv(There)20 -b(are)g(a)g(lot)h(of)f(types,)f(b)n(ut)i(most)f(important)f(are:)p -Black 396 2061 a 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--git a/helm/DEVEL/pxp/pxp/doc/manual/src/getcode.ml b/helm/DEVEL/pxp/pxp/doc/manual/src/getcode.ml deleted file mode 100755 index 4db669036..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/getcode.ml +++ /dev/null @@ -1,56 +0,0 @@ -#! /bin/sh -# (* -exec ocamlfattop "$0" -*) directory ".";; - -open Str;; - -let name_re = regexp "(\\*\\$[ \t]*\\([a-zA-Z0-9.-]*\\)[ \t]*\\*)";; -let subst_re = regexp "[<>&'%]";; - -let begin_entity name = - "\n" -;; - - -let text = ref "" in -let within_entity = ref false in -try - while true do - let line = read_line() in - if string_match name_re line 0 then begin - let name = matched_group 1 line in - if !within_entity then - text := !text ^ "\n" ^ end_entity(); - within_entity := false; - if name <> "-" then begin - text := !text ^ begin_entity name; - within_entity := true - end - end - else - if !within_entity then begin - let line' = - global_substitute subst_re - (fun s -> - let s' = matched_group 0 s in - match s' with - "<" -> "<" - | ">" -> ">" - | "&" -> "&" - | "'" -> "'" - | "%" -> "&percent;" - | _ -> assert false) - line - in - text := !text ^ "\n" ^ line' - end - done; -with End_of_file -> - if !within_entity then - text := !text ^ "\n" ^ end_entity(); - print_string !text -;; diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/markup.css b/helm/DEVEL/pxp/pxp/doc/manual/src/markup.css deleted file mode 100644 index 67dfaecb7..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/markup.css +++ /dev/null @@ -1,4 +0,0 @@ -.acronym { - font-weight: bold; - color: #c71585 -} diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/markup.dsl b/helm/DEVEL/pxp/pxp/doc/manual/src/markup.dsl deleted file mode 100644 index cd9b1e2bf..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/markup.dsl +++ /dev/null @@ -1,74 +0,0 @@ - - - - - -]]> - - -]]> -]> - - - - -;; HTML: - - - -;; printing: - - - -;; both: - -(define %section-autolabel% - ;; Are sections enumerated? - #t) - - - - - diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/markup.sgml b/helm/DEVEL/pxp/pxp/doc/manual/src/markup.sgml deleted file mode 100644 index 1cb2064cb..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/markup.sgml +++ /dev/null @@ -1,5109 +0,0 @@ -PXP"> -PXP"> - - - - - -%readme.code.to-html; -%get.markup-yacc.mli; -%get.markup-dtd.mli; - - - -]> - - - - - The PXP user's guide - - - - - Gerd - Stolpmann - - -
- gerd@gerd-stolpmann.de -
-
-
-
-
- - - 1999, 2000Gerd Stolpmann - - - - - -&markup; is a validating parser for XML-1.0 which has been -written entirely in Objective Caml. - - - Download &markup;: - -The free &markup; library can be downloaded at - -http://www.ocaml-programming.de/packages/ -. This user's guide is included. -Newest releases of &markup; will be announced in -The OCaml Link -Database. - - - - - - License - -This document, and the described software, "&markup;", are copyright by -Gerd Stolpmann. - - - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this document and the "&markup;" software (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - - -The above copyright notice and this permission notice shall be included -in all copies or substantial portions of the Software. - - -The Software is provided ``as is'', without warranty of any kind, express -or implied, including but not limited to the warranties of -merchantability, fitness for a particular purpose and noninfringement. -In no event shall Gerd Stolpmann be liable for any claim, damages or -other liability, whether in an action of contract, tort or otherwise, -arising from, out of or in connection with the Software or the use or -other dealings in the software. - - - -
- - - - - - User's guide - - - What is XML? - - - Introduction - - XML (short for Extensible Markup Language) -generalizes the idea that text documents are typically structured in sections, -sub-sections, paragraphs, and so on. The format of the document is not fixed -(as, for example, in HTML), but can be declared by a so-called DTD (document -type definition). The DTD describes only the rules how the document can be -structured, but not how the document can be processed. For example, if you want -to publish a book that uses XML markup, you will need a processor that converts -the XML file into a printable format such as Postscript. On the one hand, the -structure of XML documents is configurable; on the other hand, there is no -longer a canonical interpretation of the elements of the document; for example -one XML DTD might want that paragraphes are delimited by -para tags, and another DTD expects p tags -for the same purpose. As a result, for every DTD a new processor is required. - - - -Although XML can be used to express structured text documents it is not limited -to this kind of application. For example, XML can also be used to exchange -structured data over a network, or to simply store structured data in -files. Note that XML documents cannot contain arbitrary binary data because -some characters are forbidden; for some applications you need to encode binary -data as text (e.g. the base 64 encoding). - - - - - The "hello world" example - -The following example shows a very simple DTD, and a corresponding document -instance. The document is structured such that it consists of sections, and -that sections consist of paragraphs, and that paragraphs contain plain text: - - - - - - -]]> - - - The following document is an instance of this DTD: - - - - - -
- This is a paragraph of the first section. - This is another paragraph of the first section. -
-
- This is the only paragraph of the second section. -
-
-]]> -
- - As in HTML (and, of course, in grand-father SGML), the "pieces" of -the document are delimited by element braces, i.e. such a piece begins with -<name-of-the-type-of-the-piece> and ends with -</name-of-the-type-of-the-piece>, and the pieces are -called elements. Unlike HTML and SGML, both start tags and -end tags (i.e. the delimiters written in angle brackets) can never be left -out. For example, HTML calls the paragraphs simply p, and -because paragraphs never contain paragraphs, a sequence of several paragraphs -can be written as: - -First paragraph -

Second paragraph]]> - -This is not possible in XML; continuing our example above we must always write - -First paragraph -Second paragraph]]> - -The rationale behind that is to (1) simplify the development of XML parsers -(you need not convert the DTD into a deterministic finite automaton which is -required to detect omitted tags), and to (2) make it possible to parse the -document independent of whether the DTD is known or not. - - - -The first line of our sample document, - - -]]> - - -is the so-called XML declaration. It expresses that the -document follows the conventions of XML version 1.0, and that the document is -encoded using characters from the ISO-8859-1 character set (often known as -"Latin 1", mostly used in Western Europe). Although the XML declaration is not -mandatory, it is good style to include it; everybody sees at the first glance -that the document uses XML markup and not the similar-looking HTML and SGML -markup languages. If you omit the XML declaration, the parser will assume -that the document is encoded as UTF-8 or UTF-16 (there is a rule that makes -it possible to distinguish between UTF-8 and UTF-16 automatically); these -are encodings of Unicode's universal character set. (Note that &pxp;, unlike its -predecessor "Markup", fully supports Unicode.) - - - -The second line, - - -]]> - - -names the DTD that is going to be used for the rest of the document. In -general, it is possible that the DTD consists of two parts, the so-called -external and the internal subset. "External" means that the DTD exists as a -second file; "internal" means that the DTD is included in the same file. In -this example, there is only an external subset, and the system identifier -"simple.dtd" specifies where the DTD file can be found. System identifiers are -interpreted as URLs; for instance this would be legal: - - -]]> - - -Please note that &pxp; cannot interpret HTTP identifiers by default, but it is -possible to change the interpretation of system identifiers. - - - -The word immediately following DOCTYPE determines which of -the declared element types (here "document", "section", and "paragraph") is -used for the outermost element, the root element. In this -example it is document because the outermost element is -delimited by <document> and -</document>. - - - -The DTD consists of three declarations for element types: -document, section, and -paragraph. Such a declaration has two parts: - - -<!ELEMENT name content-model> - - -The content model is a regular expression which describes the possible inner -structure of the element. Here, document contains one or -more sections, and a section contains one or more -paragraphs. Note that these two element types are not allowed to contain -arbitrary text. Only the paragraph element type is declared -such that parsed character data (indicated by the symbol -#PCDATA) is permitted. - - - -See below for a detailed discussion of content models. - - - - - XML parsers and processors - -XML documents are human-readable, but this is not the main purpose of this -language. XML has been designed such that documents can be read by a program -called an XML parser. The parser checks that the document -is well-formatted, and it represents the document as objects of the programming -language. There are two aspects when checking the document: First, the document -must follow some basic syntactic rules, such as that tags are written in angle -brackets, that for every start tag there must be a corresponding end tag and so -on. A document respecting these rules is -well-formed. Second, the document must match the DTD in -which case the document is valid. Many parsers check only -on well-formedness and ignore the DTD; &pxp; is designed such that it can -even validate the document. - - - -A parser does not make a sensible application, it only reads XML -documents. The whole application working with XML-formatted data is called an -XML processor. Often XML processors convert documents into -another format, such as HTML or Postscript. Sometimes processors extract data -of the documents and output the processed data again XML-formatted. The parser -can help the application processing the document; for example it can provide -means to access the document in a specific manner. &pxp; supports an -object-oriented access layer specially. - - - - - Discussion - -As we have seen, there are two levels of description: On the one hand, XML can -define rules about the format of a document (the DTD), on the other hand, XML -expresses structured documents. There are a number of possible applications: - - - - - -XML can be used to express structured texts. Unlike HTML, there is no canonical -interpretation; one would have to write a backend for the DTD that translates -the structured texts into a format that existing browsers, printers -etc. understand. The advantage of a self-defined document format is that it is -possible to design the format in a more problem-oriented way. For example, if -the task is to extract reports from a database, one can use a DTD that reflects -the structure of the report or the database. A possible approach would be to -have an element type for every database table and for every column. Once the -DTD has been designed, the report procedure can be splitted up in a part that -selects the database rows and outputs them as an XML document according to the -DTD, and in a part that translates the document into other formats. Of course, -the latter part can be solved in a generic way, e.g. there may be configurable -backends for all DTDs that follow the approach and have element types for -tables and columns. - - - -XML plays the role of a configurable intermediate format. The database -extraction function can be written without having to know the details of -typesetting; the backends can be written without having to know the details of -the database. - - - -Of course, there are traditional solutions. One can define an ad hoc -intermediate text file format. This disadvantage is that there are no names for -the pieces of the format, and that such formats usually lack of documentation -because of this. Another solution would be to have a binary representation, -either as language-dependent or language-independent structure (example of the -latter can be found in RPC implementations). The disadvantage is that it is -harder to view such representations, one has to write pretty printers for this -purpose. It is also more difficult to enter test data; XML is plain text that -can be written using an arbitrary editor (Emacs has even a good XML mode, -PSGML). All these alternatives suffer from a missing structure checker, -i.e. the programs processing these formats usually do not check the input file -or input object in detail; XML parsers check the syntax of the input (the -so-called well-formedness check), and the advanced parsers like &markup; even -verify that the structure matches the DTD (the so-called validation). - - - - - - -XML can be used as configurable communication language. A fundamental problem -of every communication is that sender and receiver must follow the same -conventions about the language. For data exchange, the question is usually -which data records and fields are available, how they are syntactically -composed, and which values are possible for the various fields. Similar -questions arise for text document exchange. XML does not answer these problems -completely, but it reduces the number of ambiguities for such conventions: The -outlines of the syntax are specified by the DTD (but not necessarily the -details), and XML introduces canonical names for the components of documents -such that it is simpler to describe the rest of the syntax and the semantics -informally. - - - - - -XML is a data storage format. Currently, every software product tends to use -its own way to store data; commercial software often does not describe such -formats, and it is a pain to integrate such software into a bigger project. -XML can help to improve this situation when several applications share the same -syntax of data files. DTDs are then neutral instances that check the format of -data files independent of applications. - - - - - - - - - - - - - Highlights of XML - - -This section explains many of the features of XML, but not all, and some -features not in detail. For a complete description, see the XML -specification. - - - - The DTD and the instance - -The DTD contains various declarations; in general you can only use a feature if -you have previously declared it. The document instance file may contain the -full DTD, but it is also possible to split the DTD into an internal and an -external subset. A document must begin as follows if the full DTD is included: - - -<?xml version="1.0" encoding="Your encoding"?> -<!DOCTYPE root [ - Declarations -]> - - -These declarations are called the internal subset. Note -that the usage of entities and conditional sections is restricted within the -internal subset. - - -If the declarations are located in a different file, you can refer to this file -as follows: - - -<?xml version="1.0" encoding="Your encoding"?> -<!DOCTYPE root SYSTEM "file name"> - - -The declarations in the file are called the external -subset. The file name is called the system -identifier. -It is also possible to refer to the file by a so-called -public identifier, but most XML applications won't use -this feature. - - -You can also specify both internal and external subsets. In this case, the -declarations of both subsets are mixed, and if there are conflicts, the -declaration of the internal subset overrides those of the external subset with -the same name. This looks as follows: - - -<?xml version="1.0" encoding="Your encoding"?> -<!DOCTYPE root SYSTEM "file name" [ - Declarations -]> - - - - -The XML declaration (the string beginning with <?xml and -ending at ?>) should specify the encoding of the -file. Common values are UTF-8, and the ISO-8859 series of character sets. Note -that every file parsed by the XML processor can begin with an XML declaration -and that every file may have its own encoding. - - - -The name of the root element must be mentioned directly after the -DOCTYPE string. This means that a full document instance -looks like - - -<?xml version="1.0" encoding="Your encoding"?> -<!DOCTYPE root SYSTEM "file name" [ - Declarations -]> - -<root> - inner contents -</root> - - - - - - - - Reserved characters - -Some characters are generally reserved to indicate markup such that they cannot -be used for character data. These characters are <, >, and -&. Furthermore, single and double quotes are sometimes reserved. If you -want to include such a character as character, write it as follows: - - - - -&lt; instead of < - - - - -&gt; instead of > - - - - -&amp; instead of & - - - - -&apos; instead of ' - - - - -&quot; instead of " - - - - -All other characters are free in the document instance. It is possible to -include a character by its position in the Unicode alphabet: - - -&#n; - - -where n is the decimal number of the -character. Alternatively, you can specify the character by its hexadecimal -number: - - -&#xn; - - -In the scope of declarations, the character % is no longer free. To include it -as character, you must use the notations &#37; or -&#x25;. - - - Note that besides &lt;, &gt;, &amp;, -&apos;, and &quot; there are no predefines character entities. This is -different from HTML which defines a list of characters that can be referenced -by name (e.g. &auml; for ä); however, if you prefer named characters, you -can declare such entities yourself (see below). - - - - - - - Elements and ELEMENT declarations - - -Elements structure the document instance in a hierarchical way. There is a -top-level element, the root element, which contains a -sequence of inner elements and character sections. The inner elements are -structured in the same way. Every element has an element -type. The beginning of the element is indicated by a start -tag, written - - -<element-type> - - -and the element continues until the corresponding end tag -is reached: - - -</element-type> - - -In XML, it is not allowed to omit start or end tags, even if the DTD would -permit this. Note that there are no special rules how to interpret spaces or -newlines near start or end tags; all spaces and newlines count. - - - -Every element type must be declared before it can be used. The declaration -consists of two parts: the ELEMENT declaration describes the content model, -i.e. which inner elements are allowed; the ATTLIST declaration describes the -attributes of the element. - - - -An element can simply allow everything as content. This is written: - - -<!ELEMENT name ANY> - - -On the opposite, an element can be forced to be empty; declared by: - - -<!ELEMENT name EMPTY> - - -Note that there is an abbreviated notation for empty element instances: -<name/>. - - - -There are two more sophisticated forms of declarations: so-called -mixed declarations, and regular -expressions. An element with mixed content contains character data -interspersed with inner elements, and the set of allowed inner elements can be -specified. In contrast to this, a regular expression declaration does not allow -character data, but the inner elements can be described by the more powerful -means of regular expressions. - - - -A declaration for mixed content looks as follows: - - -<!ELEMENT name (#PCDATA | element1 | ... | elementn )*> - - -or if you do not want to allow any inner element, simply - - -<!ELEMENT name (#PCDATA)> - - - - -

- Example - -If element type q is declared as - - -]]> - - -this is a legal instance: - - -This is character datawith inner elements]]> - - -But this is illegal because t has not been enumerated in the -declaration: - - -This is character datawith inner elements]]> - - -
- - -The other form uses a regular expression to describe the possible contents: - - -<!ELEMENT name regexp> - - -The following well-known regexp operators are allowed: - - - - -element-name - - - - - -(subexpr1 , ... , subexprn ) - - - - - -(subexpr1 | ... | subexprn ) - - - - - -subexpr* - - - - - -subexpr+ - - - - - -subexpr? - - - - -The , operator indicates a sequence of sub-models, the -| operator describes alternative sub-models. The -* indicates zero or more repetitions, and -+ one or more repetitions. Finally, ? can -be used for optional sub-models. As atoms the regexp can contain names of -elements; note that it is not allowed to include #PCDATA. - - - -The exact syntax of the regular expressions is rather strange. This can be -explained best by a list of constraints: - - - - -The outermost expression must not be -element-name. - - Illegal: -]]>; this must be written as -]]>. - - - -For the unary operators subexpr*, -subexpr+, and -subexpr?, the -subexpr must not be again an -unary operator. - - Illegal: -]]>; this must be written as -]]>. - - - -Between ) and one of the unary operatory -*, +, or ?, there must -not be whitespace. - Illegal: -]]>; this must be written as -]]>. - - There is the additional constraint that the -right parenthsis must be contained in the same entity as the left parenthesis; -see the section about parsed entities below. - - - - - - -Note that there is another restriction on regular expressions which must be -deterministic. This means that the parser must be able to see by looking at the -next token which alternative is actually used, or whether the repetition -stops. The reason for this is simply compatability with SGML (there is no -intrinsic reason for this rule; XML can live without this restriction). - - -
- Example - -The elements are declared as follows: - - - - - - -]]> - -This is a legal instance: - - -Some characters]]> - - -(Note: <s/> is an abbreviation for -<s></s>.) - -It would be illegal to leave ]]> out because at -least one instance of s or t must be -present. It would be illegal, too, if characters existed outside the -r element; the only exception is white space. -- This is -legal, too: - - -]]> - - -
- -
- - - - - Attribute lists and ATTLIST declarations - -Elements may have attributes. These are put into the start tag of an element as -follows: - - -<element-name attribute1="value1" ... attributen="valuen"> - - -Instead of -"valuek" -it is also possible to use single quotes as in -'valuek'. -Note that you cannot use double quotes literally within the value of the -attribute if double quotes are the delimiters; the same applies to single -quotes. You can generally not use < and & as characters in attribute -values. It is possible to include the paraphrases &lt;, &gt;, -&amp;, &apos;, and &quot; (and any other reference to a general -entity as long as the entity is not defined by an external file) as well as -&#n;. - - - -Before you can use an attribute you must declare it. An ATTLIST declaration -looks as follows: - - -<!ATTLIST element-name - attribute-name attribute-type attribute-default - ... - attribute-name attribute-type attribute-default -> - - -There are a lot of types, but most important are: - - - - -CDATA: Every string is allowed as attribute value. - - - - -NMTOKEN: Every nametoken is allowed as attribute -value. Nametokens consist (mainly) of letters, digits, ., :, -, _ in arbitrary -order. - - - - -NMTOKENS: A space-separated list of nametokens is allowed as -attribute value. - - - - -The most interesting default declarations are: - - - - -#REQUIRED: The attribute must be specified. - - - - -#IMPLIED: The attribute can be specified but also can be -left out. The application can find out whether the attribute was present or -not. - - - - -"value" or -'value': This particular value is -used as default if the attribute is omitted in the element. - - - - - -
- Example - -This is a valid attribute declaration for element type r: - - - -]]> - -This means that x is a required attribute that cannot be -left out, while y and z are optional. The -XML parser indicates the application whether y is present or -not, but if z is missing the default value -"one two three" is returned automatically. - - - -This is a valid example of these attributes: - - -]]> - - -
- -
- - - Parsed entities - -Elements describe the logical structure of the document, while -entities determine the physical structure. Entities are -the pieces of text the parser operates on, mostly files and macros. Entities -may be parsed in which case the parser reads the text and -interprets it as XML markup, or unparsed which simply -means that the data of the entity has a foreign format (e.g. a GIF icon). - - - If the parsed entity is going to be used as part of the DTD, it -is called a parameter entity. You can declare a parameter -entity with a fixed text as content by: - - -<!ENTITY % name "value"> - - -Within the DTD, you can refer to this entity, i.e. read -the text of the entity, by: - - -%name; - - -Such entities behave like macros, i.e. when they are referred to, the -macro text is inserted and read instead of the original text. - -
- Example - -For example, you can declare two elements with the same content model by: - - - - - -]]> - - - -
- -If the contents of the entity are given as string constant, the entity is -called an internal entity. It is also possible to name a -file to be used as content (an external entity): - - -<!ENTITY % name SYSTEM "file name"> - - -There are some restrictions for parameter entities: - - - - -If the internal parameter entity contains the first token of a declaration -(i.e. <!), it must also contain the last token of the -declaration, i.e. the >. This means that the entity -either contains a whole number of complete declarations, or some text from the -middle of one declaration. - -Illegal: - -"> - Because <! is contained in the main -entity, and the corresponding > is contained in the -entity e. - - - -If the internal parameter entity contains a left paranthesis, it must also -contain the corresponding right paranthesis. - -Illegal: - - - -]]> Because ( is contained in the entity -e, and the corresponding ) is -contained in the main entity. - - - -When reading text from an entity, the parser automatically inserts one space -character before the entity text and one space character after the entity -text. However, this rule is not applied within the definition of another -entity. -Legal: - - - -]]> Because %suffix; is referenced within -the definition text for iconfile, no additional spaces are -added. - -Illegal: - - - -]]> -Because %suffix; is referenced outside the definition -text of another entity, the parser replaces %suffix; by -spacetestspace. -Illegal: - - - -]]> Because there is a whitespace between ) -and *, which is illegal. - - - -An external parameter entity must always consist of a whole number of complete -declarations. - - - - -In the internal subset of the DTD, a reference to a parameter entity (internal -or external) is only allowed at positions where a new declaration can start. - - - -
- - -If the parsed entity is going to be used in the document instance, it is called -a general entity. Such entities can be used as -abbreviations for frequent phrases, or to include external files. Internal -general entities are declared as follows: - - -<!ENTITY name "value"> - - -External general entities are declared this way: - - -<!ENTITY name SYSTEM "file name"> - - -References to general entities are written as: - - -&name; - - -The main difference between parameter and general entities is that the former -are only recognized in the DTD and that the latter are only recognized in the -document instance. As the DTD is parsed before the document, the parameter -entities are expanded first; for example it is possible to use the content of a -parameter entity as the name of a general entity: -&#38;%name;;This construct is only -allowed within the definition of another entity; otherwise extra spaces would -be added (as explained above). Such indirection is not recommended. - -Complete example: - - - - - -]]> -You can now write &text; in the document instance, and -depending on the value of variant either -text-a or text-b is inserted. -. - - -General entities must respect the element hierarchy. This means that there must -be an end tag for every start tag in the entity value, and that end tags -without corresponding start tags are not allowed. - - -
- Example - -If the author of a document changes sometimes, it is worthwhile to set up a -general entity containing the names of the authors. If the author changes, you -need only to change the definition of the entity, and do not need to check all -occurrences of authors' names: - - - -]]> - - -In the document text, you can now refer to the author names by writing -&authors;. - - - -Illegal: -The following two entities are illegal because the elements in the definition -do not nest properly: - - -"> -"> -]]> - -
- - -Earlier in this introduction we explained that there are substitutes for -reserved characters: &lt;, &gt;, &amp;, &apos;, and -&quot;. These are simply predefined general entities; note that they are -the only predefined entities. It is allowed to define these entities again -as long as the meaning is unchanged. - - - - - Notations and unparsed entities - -Unparsed entities have a foreign format and can thus not be read by the XML -parser. Unparsed entities are always external. The format of an unparsed entity -must have been declared, such a format is called a -notation. The entity can then be declared by referring to -this notation. As unparsed entities do not contain XML text, it is not possible -to include them directly into the document; you can only declare attributes -such that names of unparsed entities are acceptable values. - - - -As you can see, unparsed entities are too complicated in order to have any -purpose. It is almost always better to simply pass the name of the data file as -normal attribute value, and let the application recognize and process the -foreign format. - - - - - - - - - - - A complete example: The <emphasis>readme</emphasis> DTD - -The reason for readme was that I often wrote two versions -of files such as README and INSTALL which explain aspects of a distributed -software archive; one version was ASCII-formatted, the other was written in -HTML. Maintaining both versions means double amount of work, and changes -of one version may be forgotten in the other version. To improve this situation -I invented the readme DTD which allows me to maintain only -one source written as XML document, and to generate the ASCII and the HTML -version from it. - - - -In this section, I explain only the DTD. The readme DTD is -contained in the &markup; distribution together with the two converters to -produce ASCII and HTML. Another section of this manual describes the HTML -converter. - - - -The documents have a simple structure: There are up to three levels of nested -sections, paragraphs, item lists, footnotes, hyperlinks, and text emphasis. The -outermost element has usually the type readme, it is -declared by - - - - -]]> - -This means that this element contains one or more sections of the first level -(element type sect1), and that the element has a required -attribute title containing character data (CDATA). Note that -readme elements must not contain text data. - - - -The three levels of sections are declared as follows: - - - - - - - -]]> - -Every section has a title element as first subelement. After -the title an arbitrary but non-empty sequence of inner sections, paragraphs and -item lists follows. Note that the inner sections must belong to the next higher -section level; sect3 elements must not contain inner -sections because there is no next higher level. - - - -Obviously, all three declarations allow paragraphs (p) and -item lists (ul). The definition can be simplified at this -point by using a parameter entity: - - - - - - - - - -]]> - -Here, the entity p.like is nothing but a macro abbreviating -the same sequence of declarations; if new elements on the same level as -p and ul are later added, it is -sufficient only to change the entity definition. Note that there are some -restrictions on the usage of entities in this context; most important, entities -containing a left paranthesis must also contain the corresponding right -paranthesis. - - - -Note that the entity p.like is a -parameter entity, i.e. the ENTITY declaration contains a -percent sign, and the entity is referred to by -%p.like;. This kind of entity must be used to abbreviate -parts of the DTD; the general entities declared without -percent sign and referred to as &name; are not allowed -in this context. - - - -The title element specifies the title of the section in -which it occurs. The title is given as character data, optionally interspersed -with line breaks (br): - - - -]]> - -Compared with the title attribute of -the readme element, this element allows inner markup -(i.e. br) while attribute values do not: It is an error if -an attribute value contains the left angle bracket < literally such that it -is impossible to include inner elements. - - - -The paragraph element p has a structure similar to -title, but it allows more inner elements: - - - - - -]]> - -Line breaks do not have inner structure, so they are declared as being empty: - - - -]]> - -This means that really nothing is allowed within br; you -must always write
]]>
or abbreviated -]]>. -
- - -Code samples should be marked up by the code tag; emphasized -text can be indicated by em: - - - - - -]]> - -That code elements are not allowed to contain further markup -while em elements do is a design decision by the author of -the DTD. - - - -Unordered lists simply consists of one or more list items, and a list item may -contain paragraph-level material: - - - - - -]]> - -Footnotes are described by the text of the note; this text may contain -text-level markup. There is no mechanism to describe the numbering scheme of -footnotes, or to specify how footnote references are printed. - - - -]]> - -Hyperlinks are written as in HTML. The anchor tag contains the text describing -where the link points to, and the href attribute is the -pointer (as URL). There is no way to describe locations of "hash marks". If the -link refers to another readme document, the attribute -readmeref should be used instead of href. -The reason is that the converted document has usually a different system -identifier (file name), and the link to a converted document must be -converted, too. - - - - -]]> - -Note that although it is only sensible to specify one of the two attributes, -the DTD has no means to express this restriction. - - - -So far the DTD. Finally, here is a document for it: - - - - - - - Usage -

- The readme converter is invoked on the command line by: -

-

- readme [ -text | -html ] input.xml -

-

- Here a list of options: -

-
    -
  • -

    -text: specifies that ASCII output should be produced

    -
  • -
  • -

    -html: specifies that HTML output should be produced

    -
  • -
-

- The input file must be given on the command line. The converted output is - printed to stdout. -

-
- - Author -

- The program has been written by - Gerd Stolpmann. -

-
-
-]]>
- -
- - -
- - - - - - Using &markup; - - - Validation - -The parser can be used to validate a document. This means -that all the constraints that must hold for a valid document are actually -checked. Validation is the default mode of &markup;, i.e. every document is -validated while it is being parsed. - - - -In the examples directory of the distribution you find the -pxpvalidate application. It is invoked in the following way: - - -pxpvalidate [ -wf ] file... - - -The files mentioned on the command line are validated, and every warning and -every error messages are printed to stderr. - - - -The -wf switch modifies the behaviour such that a well-formedness parser is -simulated. In this mode, the ELEMENT, ATTLIST, and NOTATION declarations of the -DTD are ignored, and only the ENTITY declarations will take effect. This mode -is intended for documents lacking a DTD. Please note that the parser still -scans the DTD fully and will report all errors in the DTD; such checks are not -required by a well-formedness parser. - - - -The pxpvalidate application is the simplest sensible program -using &markup;, you may consider it as "hello world" program. - - - - - - - - - How to parse a document from an application - -Let me first give a rough overview of the object model of the parser. The -following items are represented by objects: - - - - -Documents: The document representation is more or less the -anchor for the application; all accesses to the parsed entities start here. It -is described by the class document contained in the module -Pxp_document. You can get some global information, such -as the XML declaration the document begins with, the DTD of the document, -global processing instructions, and most important, the document tree. - - - - - -The contents of documents: The contents have the structure -of a tree: Elements contain other elements and textElements may -also contain processing instructions. Unlike other document models, &markup; -separates processing instructions from the rest of the text and provides a -second interface to access them (method pinstr). However, -there is a parser option (enable_pinstr_nodes) which changes -the behaviour of the parser such that extra nodes for processing instructions -are included into the tree. -Furthermore, the tree does normally not contain nodes for XML comments; -they are ignored by default. Again, there is an option -(enable_comment_nodes) changing this. -. - -The common type to represent both kinds of content is node -which is a class type that unifies the properties of elements and character -data. Every node has a list of children (which is empty if the element is empty -or the node represents text); nodes may have attributes; nodes have always text -contents. There are two implementations of node, the class -element_impl for elements, and the class -data_impl for text data. You find these classes and class -types in the module Pxp_document, too. - - - -Note that attribute lists are represented by non-class values. - - - - - -The node extension: For advanced usage, every node of the -document may have an associated extension which is simply -a second object. This object must have the three methods -clone, node, and -set_node as bare minimum, but you are free to add methods as -you want. This is the preferred way to add functionality to the document -treeDue to the typing system it is more or less impossible to -derive recursive classes in O'Caml. To get around this, it is common practice -to put the modifiable or extensible part of recursive objects into parallel -objects. . The class type extension is -defined in Pxp_document, too. - - - - - -The DTD: Sometimes it is necessary to access the DTD of a -document; the average application does not need this feature. The class -dtd describes DTDs, and makes it possible to get -representations of element, entity, and notation declarations as well as -processing instructions contained in the DTD. This class, and -dtd_element, dtd_notation, and -proc_instruction can be found in the module -Pxp_dtd. There are a couple of classes representing -different kinds of entities; these can be found in the module -Pxp_entity. - - - - -Additionally, the following modules play a role: - - - - -Pxp_yacc: Here the main parsing functions such as -parse_document_entity are located. Some additional types and -functions allow the parser to be configured in a non-standard way. - - - - - -Pxp_types: This is a collection of basic types and -exceptions. - - - - -There are some further modules that are needed internally but are not part of -the API. - - - -Let the document to be parsed be stored in a file called -doc.xml. The parsing process is started by calling the -function - - -val parse_document_entity : config -> source -> 'ext spec -> 'ext document - - -defined in the module Pxp_yacc. The first argument -specifies some global properties of the parser; it is recommended to start with -the default_config. The second argument determines where the -document to be parsed comes from; this may be a file, a channel, or an entity -ID. To parse doc.xml, it is sufficient to pass -from_file "doc.xml". - - - -The third argument passes the object specification to use. Roughly -speaking, it determines which classes implement the node objects of which -element types, and which extensions are to be used. The 'ext -polymorphic variable is the type of the extension. For the moment, let us -simply pass default_spec as this argument, and ignore it. - - - -So the following expression parses doc.xml: - - -open Pxp_yacc -let d = parse_document_entity default_config (from_file "doc.xml") default_spec - - -Note that default_config implies that warnings are collected -but not printed. Errors raise one of the exception defined in -Pxp_types; to get readable errors and warnings catch the -exceptions as follows: - - - - print_endline (Pxp_types.string_of_exn e) -]]> - -Now d is an object of the document -class. If you want the node tree, you can get the root element by - - -let root = d # root - - -and if you would rather like to access the DTD, determine it by - - -let dtd = d # dtd - - -As it is more interesting, let us investigate the node tree now. Given the root -element, it is possible to recursively traverse the whole tree. The children of -a node n are returned by the method -sub_nodes, and the type of a node is returned by -node_type. This function traverses the tree, and prints the -type of each node: - - - - print_endline ("Element of type " ^ name); - let children = n # sub_nodes in - List.iter print_structure children - | T_data -> - print_endline "Data" - | _ -> - (* Other node types are not possible unless the parser is configured - differently. - *) - assert false -]]> - -You can call this function by - - -print_structure root - - -The type returned by node_type is either T_element -name or T_data. The name of the -element type is the string included in the angle brackets. Note that only -elements have children; data nodes are always leaves of the tree. - - - -There are some more methods in order to access a parsed node tree: - - - - -n # parent: Returns the parent node, or raises -Not_found if the node is already the root - - - - -n # root: Returns the root of the node tree. - - - - -n # attribute a: Returns the value of the attribute with -name a. The method returns a value for every -declared attribute, independently of whether the attribute -instance is defined or not. If the attribute is not declared, -Not_found will be raised. (In well-formedness mode, every -attribute is considered as being implicitly declared with type -CDATA.) - - - -The following return values are possible: Value s, -Valuelist sl , and Implied_value. -The first two value types indicate that the attribute value is available, -either because there is a definition -a="value" -in the XML text, or because there is a default value (declared in the -DTD). Only if both the instance definition and the default declaration are -missing, the latter value Implied_value will be returned. - - - -In the DTD, every attribute is typed. There are single-value types (CDATA, ID, -IDREF, ENTITY, NMTOKEN, enumerations), in which case the method passes -Value s back, where s is the normalized -string value of the attribute. The other types (IDREFS, ENTITIES, NMTOKENS) -represent list values, and the parser splits the XML literal into several -tokens and returns these tokens as Valuelist sl. - - - -Normalization means that entity references (the -&name; tokens) and -character references -(&#number;) are replaced -by the text they represent, and that white space characters are converted into -plain spaces. - - - - -n # data: Returns the character data contained in the -node. For data nodes, the meaning is obvious as this is the main content of -data nodes. For element nodes, this method returns the concatenated contents of -all inner data nodes. - - -Note that entity references included in the text are resolved while they are -being parsed; for example the text will be returned -as b"]]> by this method. Spaces of data nodes are always -preserved. Newlines are preserved, but always converted to \n characters even -if newlines are encoded as \r\n or \r. Normally you will never see two adjacent -data nodes because the parser collapses all data material at one location into -one node. (However, if you create your own tree or transform the parsed tree, -it is possible to have adjacent data nodes.) - - -Note that elements that do not allow #PCDATA as content -will not have data nodes as children. This means that spaces and newlines, the -only character material allowed for such elements, are silently dropped. - - - - -For example, if the task is to print all contents of elements with type -"valuable" whose attribute "priority" is "1", this function can help: - - - - print_endline "Valuable node with priotity 1 found:"; - print_endline (n # data) - | (T_element _ | T_data) -> - let children = n # sub_nodes in - List.iter print_valuable_prio1 children - | _ -> - assert false -]]> - -You can call this function by: - - -print_valuable_prio1 root - - -If you like a DSSSL-like style, you can make the function -process_children explicit: - - - - print_endline "Valuable node with priority 1 found:"; - print_endline (n # data) - | (T_element _ | T_data) -> - process_children n - | _ -> - assert false -]]> - -So far, O'Caml is now a simple "style-sheet language": You can form a big -"match" expression to distinguish between all significant cases, and provide -different reactions on different conditions. But this technique has -limitations; the "match" expression tends to get larger and larger, and it is -difficult to store intermediate values as there is only one big -recursion. Alternatively, it is also possible to represent the various cases as -classes, and to use dynamic method lookup to find the appropiate class. The -next section explains this technique in detail. - - - - - - - - - - Class-based processing of the node tree - -By default, the parsed node tree consists of objects of the same class; this is -a good design as long as you want only to access selected parts of the -document. For complex transformations, it may be better to use different -classes for objects describing different element types. - - - -For example, if the DTD declares the element types a, -b, and c, and if the task is to convert -an arbitrary document into a printable format, the idea is to define for every -element type a separate class that has a method print. The -classes are eltype_a, eltype_b, and -eltype_c, and every class implements -print such that elements of the type corresponding to the -class are converted to the output format. - - - -The parser supports such a design directly. As it is impossible to derive -recursive classes in O'CamlThe problem is that the subclass is -usually not a subtype in this case because O'Caml has a contravariant subtyping -rule. , the specialized element classes cannot be formed by -simply inheriting from the built-in classes of the parser and adding methods -for customized functionality. To get around this limitation, every node of the -document tree is represented by two objects, one called -"the node" and containing the recursive definition of the tree, one called "the -extension". Every node object has a reference to the extension, and the -extension has a reference to the node. The advantage of this model is that it -is now possible to customize the extension without affecting the typing -constraints of the recursive node definition. - - - -Every extension must have the three methods clone, -node, and set_node. The method -clone creates a deep copy of the extension object and -returns it; node returns the node object for this extension -object; and set_node is used to tell the extension object -which node is associated with it, this method is automatically called when the -node tree is initialized. The following definition is a good starting point -for these methods; usually clone must be further refined -when instance variables are added to the class: - - -} - method node = - match node with - None -> - assert false - | Some n -> n - method set_node n = - node <- Some n - - end -]]> - - -This part of the extension is usually the same for all classes, so it is a good -idea to consider custom_extension as the super-class of the -further class definitions. Continuining the example of above, we can define the -element type classes as follows: - - - unit - end - -class eltype_a = - object (self) - inherit custom_extension - method print ch = ... - end - -class eltype_b = - object (self) - inherit custom_extension - method print ch = ... - end - -class eltype_c = - object (self) - inherit custom_extension - method print ch = ... - end -]]> - -The method print can now be implemented for every element -type separately. Note that you get the associated node by invoking - - -self # node - - -and you get the extension object of a node n by writing - - -n # extension - - -It is guaranteed that - - -self # node # extension == self - - -always holds. - - - Here are sample definitions of the print -methods: - -... are only containers: *) - output_string ch "("; - List.iter - (fun n -> n # extension # print ch) - (self # node # sub_nodes); - output_string ch ")"; - end - -class eltype_b = - object (self) - inherit custom_extension - method print ch = - (* Print the value of the CDATA attribute "print": *) - match self # node # attribute "print" with - Value s -> output_string ch s - | Implied_value -> output_string ch "" - | Valuelist l -> assert false - (* not possible because the att is CDATA *) - end - -class eltype_c = - object (self) - inherit custom_extension - method print ch = - (* Print the contents of this element: *) - output_string ch (self # node # data) - end - -class null_extension = - object (self) - inherit custom_extension - method print ch = assert false - end -]]> - - - - -The remaining task is to configure the parser such that these extension classes -are actually used. Here another problem arises: It is not possible to -dynamically select the class of an object to be created. As workaround, -&markup; allows the user to specify exemplar objects for -the various element types; instead of creating the nodes of the tree by -applying the new operator the nodes are produced by -duplicating the exemplars. As object duplication preserves the class of the -object, one can create fresh objects of every class for which previously an -exemplar has been registered. - - - -Exemplars are meant as objects without contents, the only interesting thing is -that exemplars are instances of a certain class. The creation of an exemplar -for an element node can be done by: - - -let element_exemplar = new element_impl extension_exemplar - - -And a data node exemplar is created by: - - -let data_exemplar = new data_impl extension_exemplar - - -The classes element_impl and data_impl -are defined in the module Pxp_document. The constructors -initialize the fresh objects as empty objects, i.e. without children, without -data contents, and so on. The extension_exemplar is the -initial extension object the exemplars are associated with. - - - -Once the exemplars are created and stored somewhere (e.g. in a hash table), you -can take an exemplar and create a concrete instance (with contents) by -duplicating it. As user of the parser you are normally not concerned with this -as this is part of the internal logic of the parser, but as background knowledge -it is worthwhile to mention that the two methods -create_element and create_data actually -perform the duplication of the exemplar for which they are invoked, -additionally apply modifications to the clone, and finally return the new -object. Moreover, the extension object is copied, too, and the new node object -is associated with the fresh extension object. Note that this is the reason why -every extension object must have a clone method. - - - -The configuration of the set of exemplars is passed to the -parse_document_entity function as third argument. In our -example, this argument can be set up as follows: - - - - -The ~element_alist function argument defines the mapping -from element types to exemplars as associative list. The argument -~data_exemplar specifies the exemplar for data nodes, and -the ~default_element_exemplar is used whenever the parser -finds an element type for which the associative list does not define an -exemplar. - - - -The configuration is now complete. You can still use the same parsing -functions, only the initialization is a bit different. For example, call the -parser by: - - -let d = parse_document_entity default_config (from_file "doc.xml") spec - - -Note that the resulting document d has a usable type; -especially the print method we added is visible. So you can -print your document by - - -d # root # extension # print stdout - - - - -This object-oriented approach looks rather complicated; this is mostly caused -by working around some problems of the strict typing system of O'Caml. Some -auxiliary concepts such as extensions were needed, but the practical -consequences are low. In the next section, one of the examples of the -distribution is explained, a converter from readme -documents to HTML. - - - - - - - - - - Example: An HTML backend for the <emphasis>readme</emphasis> -DTD - - The converter from readme documents to HTML -documents follows strictly the approach to define one class per element -type. The HTML code is similar to the readme source, -because of this most elements can be converted in the following way: Given the -input element - - -content]]> - - -the conversion text is the concatenation of a computed prefix, the recursively -converted content, and a computed suffix. - - - -Only one element type cannot be handled by this scheme: -footnote. Footnotes are collected while they are found in -the input text, and they are printed after the main text has been converted and -printed. - - - - Header - -&readme.code.header; - - - - - Type declarations - -&readme.code.footnote-printer; - - - - - Class <literal>store</literal> - -The store is a container for footnotes. You can add a -footnote by invoking alloc_footnote; the argument is an -object of the class footnote_printer, the method returns the -number of the footnote. The interesting property of a footnote is that it can -be converted to HTML, so a footnote_printer is an object -with a method footnote_to_html. The class -footnote which is defined below has a compatible method -footnote_to_html such that objects created from it can be -used as footnote_printers. - - -The other method, print_footnotes prints the footnotes as -definition list, and is typically invoked after the main material of the page -has already been printed. Every item of the list is printed by -footnote_to_html. - - - -&readme.code.store; - - - - - Function <literal>escape_html</literal> - -This function converts the characters <, >, &, and " to their HTML -representation. For example, -escape_html "<>" = "&lt;&gt;". Other -characters are left unchanged. - -&readme.code.escape-html; - - - - - Virtual class <literal>shared</literal> - -This virtual class is the abstract superclass of the extension classes shown -below. It defines the standard methods clone, -node, and set_node, and declares the type -of the virtual method to_html. This method recursively -traverses the whole element tree, and prints the converted HTML code to the -output channel passed as second argument. The first argument is the reference -to the global store object which collects the footnotes. - -&readme.code.shared; - - - - - Class <literal>only_data</literal> - -This class defines to_html such that the character data of -the current node is converted to HTML. Note that self is an -extension object, self # node is the node object, and -self # node # data returns the character data of the node. - -&readme.code.only-data; - - - - - Class <literal>readme</literal> - -This class converts elements of type readme to HTML. Such an -element is (by definition) always the root element of the document. First, the -HTML header is printed; the title attribute of the element -determines the title of the HTML page. Some aspects of the HTML page can be -configured by setting certain parameter entities, for example the background -color, the text color, and link colors. After the header, the -body tag, and the headline have been printed, the contents -of the page are converted by invoking to_html on all -children of the current node (which is the root node). Then, the footnotes are -appended to this by telling the global store object to print -the footnotes. Finally, the end tags of the HTML pages are printed. - - - -This class is an example how to access the value of an attribute: The value is -determined by invoking self # node # attribute "title". As -this attribute has been declared as CDATA and as being required, the value has -always the form Value s where s is the -string value of the attribute. - - - -You can also see how entity contents can be accessed. A parameter entity object -can be looked up by self # node # dtd # par_entity "name", -and by invoking replacement_text the value of the entity -is returned after inner parameter and character entities have been -processed. Note that you must use gen_entity instead of -par_entity to access general entities. - - - -&readme.code.readme; - - - - - Classes <literal>section</literal>, <literal>sect1</literal>, -<literal>sect2</literal>, and <literal>sect3</literal> - -As the conversion process is very similar, the conversion classes of the three -section levels are derived from the more general section -class. The HTML code of the section levels only differs in the type of the -headline, and because of this the classes describing the section levels can be -computed by replacing the class argument the_tag of -section by the HTML name of the headline tag. - - - -Section elements are converted to HTML by printing a headline and then -converting the contents of the element recursively. More precisely, the first -sub-element is always a title element, and the other -elements are the contents of the section. This structure is declared in the -DTD, and it is guaranteed that the document matches the DTD. Because of this -the title node can be separated from the rest without any checks. - - - -Both the title node, and the body nodes are then converted to HTML by calling -to_html on them. - - - -&readme.code.section; - - - - - Classes <literal>map_tag</literal>, <literal>p</literal>, -<literal>em</literal>, <literal>ul</literal>, <literal>li</literal> - -Several element types are converted to HTML by simply mapping them to -corresponding HTML element types. The class map_tag -implements this, and the class argument the_target_tag -determines the tag name to map to. The output consists of the start tag, the -recursively converted inner elements, and the end tag. - -&readme.code.map-tag; - - - - - Class <literal>br</literal> - -Element of type br are mapped to the same HTML type. Note -that HTML forbids the end tag of br. - -&readme.code.br; - - - - - Class <literal>code</literal> - -The code type is converted to a pre -section (preformatted text). As the meaning of tabs is unspecified in HTML, -tabs are expanded to spaces. - -&readme.code.code; - - - - - Class <literal>a</literal> - -Hyperlinks, expressed by the a element type, are converted -to the HTML a type. If the target of the hyperlink is given -by href, the URL of this attribute can be used -directly. Alternatively, the target can be given by -readmeref in which case the ".html" suffix must be added to -the file name. - - - -Note that within a only #PCDATA is allowed, so the contents -can be converted directly by applying escape_html to the -character data contents. - -&readme.code.a; - - - - - Class <literal>footnote</literal> - -The footnote class has two methods: -to_html to convert the footnote reference to HTML, and -footnote_to_html to convert the footnote text itself. - - - -The footnote reference is converted to a local hyperlink; more precisely, to -two anchor tags which are connected with each other. The text anchor points to -the footnote anchor, and the footnote anchor points to the text anchor. - - - -The footnote must be allocated in the store object. By -allocating the footnote, you get the number of the footnote, and the text of -the footnote is stored until the end of the HTML page is reached when the -footnotes can be printed. The to_html method stores simply -the object itself, such that the footnote_to_html method is -invoked on the same object that encountered the footnote. - - - -The to_html only allocates the footnote, and prints the -reference anchor, but it does not print nor convert the contents of the -note. This is deferred until the footnotes actually get printed, i.e. the -recursive call of to_html on the sub nodes is done by -footnote_to_html. - - - -Note that this technique does not work if you make another footnote within a -footnote; the second footnote gets allocated but not printed. - - - -&readme.code.footnote; - - - - - The specification of the document model - -This code sets up the hash table that connects element types with the exemplars -of the extension classes that convert the elements to HTML. - -&readme.code.tag-map; - - - - - - - - - - - - The objects representing the document - - -This description might be out-of-date. See the module interface files -for updated information. - - - The <literal>document</literal> class - - - - object - method init_xml_version : string -> unit - method init_root : 'ext node -> unit - - method xml_version : string - method xml_standalone : bool - method dtd : dtd - method root : 'ext node - - method encoding : Pxp_types.rep_encoding - - method add_pinstr : proc_instruction -> unit - method pinstr : string -> proc_instruction list - method pinstr_names : string list - - method write : Pxp_types.output_stream -> Pxp_types.encoding -> unit - - end -;; -]]> - - -The methods beginning with init_ are only for internal use -of the parser. - - - - - -xml_version: returns the version string at the beginning of -the document. For example, "1.0" is returned if the document begins with -<?xml version="1.0"?>. - - - -xml_standalone: returns the boolean value of -standalone declaration in the XML declaration. If the -standalone attribute is missing, false is -returned. - - - -dtd: returns a reference to the global DTD object. - - - -root: returns a reference to the root element. - - - -encoding: returns the internal encoding of the -document. This means that all strings of which the document consists are -encoded in this character set. - - - - -pinstr: returns the processing instructions outside the DTD -and outside the root element. The argument passed to the method names a -target, and the method returns all instructions with this -target. The target is the first word inside <? and -?>. - - - -pinstr_names: returns the names of the processing instructions - - - -add_pinstr: adds another processing instruction. This method -is used by the parser itself to enter the instructions returned by -pinstr, but you can also enter additional instructions. - - - - -write: writes the document to the passed stream as XML -text using the passed (external) encoding. The generated text is always valid -XML and can be parsed by PXP; however, the text is badly formatted (this is not -a pretty printer). - - - - - - - - The class type <literal>node</literal> - - -From Pxp_document: - - -type node_type = - T_data -| T_element of string -| T_super_root -| T_pinstr of string -| T_comment -and some other, reserved types -;; - -class type [ 'ext ] node = - object ('self) - constraint 'ext = 'ext node #extension - - (* *) - - method extension : 'ext - method dtd : dtd - method parent : 'ext node - method root : 'ext node - method sub_nodes : 'ext node list - method iter_nodes : ('ext node &fun; unit) &fun; unit - method iter_nodes_sibl : - ('ext node option &fun; 'ext node &fun; 'ext node option &fun; unit) &fun; unit - method node_type : node_type - method encoding : Pxp_types.rep_encoding - method data : string - method position : (string * int * int) - method comment : string option - method pinstr : string &fun; proc_instruction list - method pinstr_names : string list - method write : Pxp_types.output_stream -> Pxp_types.encoding -> unit - - (* *) - - method attribute : string &fun; Pxp_types.att_value - method required_string_attribute : string &fun; string - method optional_string_attribute : string &fun; string option - method required_list_attribute : string &fun; string list - method optional_list_attribute : string &fun; string list - method attribute_names : string list - method attribute_type : string &fun; Pxp_types.att_type - method attributes : (string * Pxp_types.att_value) list - method id_attribute_name : string - method id_attribute_value : string - method idref_attribute_names : string - - (* *) - - method add_node : ?force:bool &fun; 'ext node &fun; unit - method add_pinstr : proc_instruction &fun; unit - method delete : unit - method set_nodes : 'ext node list &fun; unit - method quick_set_attributes : (string * Pxp_types.att_value) list &fun; unit - method set_comment : string option &fun; unit - - (* *) - - method orphaned_clone : 'self - method orphaned_flat_clone : 'self - method create_element : - ?position:(string * int * int) &fun; - dtd &fun; node_type &fun; (string * string) list &fun; - 'ext node - method create_data : dtd &fun; string &fun; 'ext node - method keep_always_whitespace_mode : unit - - (* *) - - method local_validate : ?use_dfa:bool -> unit -> unit - - (* ... Internal methods are undocumented. *) - - end -;; - - -In the module Pxp_types you can find another type -definition that is important in this context: - - -type Pxp_types.att_value = - Value of string - | Valuelist of string list - | Implied_value -;; - - - - - The structure of document trees - - -A node represents either an element or a character data section. There are two -classes implementing the two aspects of nodes: element_impl -and data_impl. The latter class does not implement all -methods because some methods do not make sense for data nodes. - - - -(Note: PXP also supports a mode which forces that processing instructions and -comments are represented as nodes of the document tree. However, these nodes -are instances of element_impl with node types -T_pinstr and T_comment, -respectively. This mode must be explicitly configured; the basic representation -knows only element and data nodes.) - - - The following figure -() shows an example how -a tree is constructed from element and data nodes. The circular areas -represent element nodes whereas the ovals denote data nodes. Only elements -may have subnodes; data nodes are always leaves of the tree. The subnodes -of an element can be either element or data nodes; in both cases the O'Caml -objects storing the nodes have the class type node. - - Attributes (the clouds in the picture) are not directly -integrated into the tree; there is always an extra link to the attribute -list. This is also true for processing instructions (not shown in the -picture). This means that there are separated access methods for attributes and -processing instructions. - -
-A tree with element nodes, data nodes, and attributes - -
- - Only elements, data sections, attributes and processing -instructions (and comments, if configured) can, directly or indirectly, occur -in the document tree. It is impossible to add entity references to the tree; if -the parser finds such a reference, not the reference as such but the referenced -text (i.e. the tree representing the structured text) is included in the -tree. - - Note that the parser collapses as much data material into one -data node as possible such that there are normally never two adjacent data -nodes. This invariant is enforced even if data material is included by entity -references or CDATA sections, or if a data sequence is interrupted by -comments. So a &amp; b <-- comment --> c <![CDATA[ -<> d]]> is represented by only one data node, for -instance. However, you can create document trees manually which break this -invariant; it is only the way the parser forms the tree. - - -
-Nodes are doubly linked trees - -
- - -The node tree has links in both directions: Every node has a link to its parent -(if any), and it has links to the subnodes (see -figure ). Obviously, -this doubly-linked structure simplifies the navigation in the tree; but has -also some consequences for the possible operations on trees. - - -Because every node must have at most one parent node, -operations are illegal if they violate this condition. The following figure -() shows on the left side -that node y is added to x as new subnode -which is allowed because y does not have a parent yet. The -right side of the picture illustrates what would happen if y -had a parent node; this is illegal because y would have two -parents after the operation. - -
-A node can only be added if it is a root - - -
- - -The "delete" operation simply removes the links between two nodes. In the -picture () the node -x is deleted from the list of subnodes of -y. After that, x becomes the root of the -subtree starting at this node. - -
-A deleted node becomes the root of the subtree - -
- - -It is also possible to make a clone of a subtree; illustrated in -. In this case, the -clone is a copy of the original subtree except that it is no longer a -subnode. Because cloning never keeps the connection to the parent, the clones -are called orphaned. - - -
-The clone of a subtree - -
-
- - - The methods of the class type <literal>node</literal> - - - - - <link linkend="type-node-general.sig">General observers</link> - - - - - - -extension: The reference to the extension object which -belongs to this node (see ...). - - - -dtd: Returns a reference to the global DTD. All nodes -of a tree must share the same DTD. - - - - -parent: Get the father node. Raises -Not_found in the case the node does not have a -parent, i.e. the node is the root. - - - -root: Gets the reference to the root node of the tree. -Every node is contained in a tree with a root, so this method always -succeeds. Note that this method searches the root, -which costs time proportional to the length of the path to the root. - - - - -sub_nodes: Returns references to the children. The returned -list reflects the order of the children. For data nodes, this method returns -the empty list. - - - - -iter_nodes f: Iterates over the children, and calls -f for every child in turn. - - - - -iter_nodes_sibl f: Iterates over the children, and calls -f for every child in turn. f gets as -arguments the previous node, the current node, and the next node. - - - -node_type: Returns either T_data which -means that the node is a data node, or T_element n -which means that the node is an element of type n. -If configured, possible node types are also T_pinstr t -indicating that the node represents a processing instruction with target -t, and T_comment in which case the node -is a comment. - - - - -encoding: Returns the encoding of the strings. - - - -data: Returns the character data of this node and all -children, concatenated as one string. The encoding of the string is what -the method encoding returns. -- For data nodes, this method simply returns the represented characters. -For elements, the meaning of the method has been extended such that it -returns something useful, i.e. the effectively contained characters, without -markup. (For T_pinstr and T_comment -nodes, the method returns the empty string.) - - - - -position: If configured, this method returns the position of -the element as triple (entity, line, byteposition). For data nodes, the -position is not stored. If the position is not available the triple -"?", 0, 0 is returned. - - - - -comment: Returns Some text for comment -nodes, and None for other nodes. The text -is everything between the comment delimiters <-- and --->. - - - - -pinstr n: Returns all processing instructions that are -directly contained in this element and that have a target -specification of n. The target is the first word after -the <?. - - - - -pinstr_names: Returns the list of all targets of processing -instructions directly contained in this element. - - - -write s enc: Prints the node and all subnodes to the passed -output stream as valid XML text, using the passed external encoding. - - - - - - - - - - <link linkend="type-node-atts.sig">Attribute observers</link> - - - - - -attribute n: Returns the value of the attribute with name -n. This method returns a value for every declared -attribute, and it raises Not_found for any undeclared -attribute. Note that it even returns a value if the attribute is actually -missing but is declared as #IMPLIED or has a default -value. - Possible values are: - - - -Implied_value: The attribute has been declared with the -keyword #IMPLIED, and the attribute is missing in the -attribute list of this element. - - - -Value s: The attribute has been declared as type -CDATA, as ID, as -IDREF, as ENTITY, or as -NMTOKEN, or as enumeration or notation, and one of the two -conditions holds: (1) The attribute value is present in the attribute list in -which case the value is returned in the string s. (2) The -attribute has been omitted, and the DTD declared the attribute with a default -value. The default value is returned in s. -- Summarized, Value s is returned for non-implied, non-list -attribute values. - - - - -Valuelist l: The attribute has been declared as type -IDREFS, as ENTITIES, or -as NMTOKENS, and one of the two conditions holds: (1) The -attribute value is present in the attribute list in which case the -space-separated tokens of the value are returned in the string list -l. (2) The attribute has been omitted, and the DTD declared -the attribute with a default value. The default value is returned in -l. -- Summarized, Valuelist l is returned for all list-type -attribute values. - - - - -Note that before the attribute value is returned, the value is normalized. This -means that newlines are converted to spaces, and that references to character -entities (i.e. &#n;) and -general entities -(i.e. &name;) are expanded; -if necessary, expansion is performed recursively. - - - -In well-formedness mode, there is no DTD which could declare an -attribute. Because of this, every occuring attribute is considered as a CDATA -attribute. - - - - -required_string_attribute n: returns the Value attribute -called n, or the Valuelist attribute as a string where the list elements -are separated by spaces. If the attribute value is implied, or if the -attribute does not exists, the method will fail. - This method is convenient -if you expect a non-implied and non-list attribute value. - - - - -optional_string_attribute n: returns the Value attribute -called n, or the Valuelist attribute as a string where the list elements -are separated by spaces. If the attribute value is implied, or if the -attribute does not exists, the method returns None. - This method is -convenient if you expect a non-list attribute value including the implied -value. - - - - -required_list_attribute n: returns the Valuelist attribute -called n, or the Value attribute as a list with a single element. -If the attribute value is implied, or if the -attribute does not exists, the method will fail. - This method is -convenient if you expect a list attribute value. - - - - -optional_list_attribute n: returns the Valuelist attribute -called n, or the Value attribute as a list with a single element. -If the attribute value is implied, or if the -attribute does not exists, an empty list will be returned. - This method -is convenient if you expect a list attribute value or the implied value. - - - - -attribute_names: returns the list of all attribute names of -this element. As this is a validating parser, this list is equal to the -list of declared attributes. - - - - -attribute_type n: returns the type of the attribute called -n. See the module Pxp_types for a -description of the encoding of the types. - - - - -attributes: returns the list of pairs of names and values -for all attributes of -this element. - - - -id_attribute_name: returns the name of the attribute that is -declared with type ID. There is at most one such attribute. The method raises -Not_found if there is no declared ID attribute for the -element type. - - - -id_attribute_value: returns the value of the attribute that -is declared with type ID. There is at most one such attribute. The method raises -Not_found if there is no declared ID attribute for the -element type. - - - -idref_attribute_names: returns the list of attribute names -that are declared as IDREF or IDREFS. - - - - - - - - - <link linkend="type-node-mods.sig">Modifying methods</link> - - - -The following methods are only defined for element nodes (more exactly: -the methods are defined for data nodes, too, but fail always). - - - - -add_node sn: Adds sub node sn to the list -of children. This operation is illustrated in the picture -. This method expects that -sn is a root, and it requires that sn and -the current object share the same DTD. - - -Because add_node is the method the parser itself uses -to add new nodes to the tree, it performs by default some simple validation -checks: If the content model is a regular expression, it is not allowed to add -data nodes to this node unless the new nodes consist only of whitespace. In -this case, the new data nodes are silently dropped (you can change this by -invoking keep_always_whitespace_mode). - - -If the document is flagged as stand-alone, these data nodes only -containing whitespace are even forbidden if the element declaration is -contained in an external entity. This case is detected and rejected. - -If the content model is EMPTY, it is not allowed to -add any data node unless the data node is empty. In this case, the new data -node is silently dropped. - - -These checks only apply if there is a DTD. In well-formedness mode, it is -assumed that every element is declared with content model -ANY which prohibits any validation check. Furthermore, you -turn these checks off by passing ~force:true as first -argument. - - - -add_pinstr pi: Adds the processing instruction -pi to the list of processing instructions. - - - - - -delete: Deletes this node from the tree. After this -operation, this node is no longer the child of the former father node; and the -node loses the connection to the father as well. This operation is illustrated -by the figure . - - - - -set_nodes nl: Sets the list of children to -nl. It is required that every member of nl -is a root, and that all members and the current object share the same DTD. -Unlike add_node, no validation checks are performed. - - - - -quick_set_attributes atts: sets the attributes of this -element to atts. It is not checked -whether atts matches the DTD or not; it is up to the -caller of this method to ensure this. (This method may be useful to transform -the attribute values, i.e. apply a mapping to every attribute.) - - - - -set_comment text: This method is only applicable to -T_comment nodes; it sets the comment text contained by such -nodes. - - - - - - - - - <link linkend="type-node-cloning.sig">Cloning methods</link> - - - - - - -orphaned_clone: Returns a clone of the node and the complete -tree below this node (deep clone). The clone does not have a parent (i.e. the -reference to the parent node is not cloned). While -copying the subtree, strings are skipped; it is likely that the original tree -and the copy tree share strings. Extension objects are cloned by invoking -the clone method on the original objects; how much of -the extension objects is cloned depends on the implemention of this method. - - This operation is illustrated by the figure -. - - - - -orphaned_flat_clone: Returns a clone of the node, -but sets the list of sub nodes to [], i.e. the sub nodes are not cloned. - - - - - -create_element dtd nt al: Returns a flat copy of this node -(which must be an element) with the following modifications: The DTD is set to -dtd; the node type is set to nt, and the -new attribute list is set to al (given as list of -(name,value) pairs). The copy does not have children nor a parent. It does not -contain processing instructions. See -the example below. - - - Note that you can specify the position of the new node -by the optional argument ~position. - - - - -create_data dtd cdata: Returns a flat copy of this node -(which must be a data node) with the following modifications: The DTD is set to -dtd; the node type is set to T_data; the -attribute list is empty (data nodes never have attributes); the list of -children and PIs is empty, too (same reason). The new node does not have a -parent. The value cdata is the new character content of the -node. See -the example below. - - - - -keep_always_whitespace_mode: Even data nodes which are -normally dropped because they only contain ignorable whitespace, can added to -this node once this mode is turned on. (This mode is useful to produce -canonical XML.) - - - - - - - - - - <link linkend="type-node-weird.sig">Validating methods</link> - - -There is one method which locally validates the node, i.e. checks whether the -subnodes match the content model of this node. - - - - -local_validate: Checks that this node conforms to the -DTD by comparing the type of the subnodes with the content model for this -node. (Applications need not call this method unless they add new nodes -themselves to the tree.) - - - - - - - - - The class <literal>element_impl</literal> - -This class is an implementation of node which -realizes element nodes: - - - [ 'ext ] node -]]> - - - - - Constructor - -You can create a new instance by - - -new element_impl extension_object - - -which creates a special form of empty element which already contains a -reference to the extension_object, but is -otherwise empty. This special form is called an -exemplar. The purpose of exemplars is that they serve as -patterns that can be duplicated and filled with data. The method - -create_element is designed to perform this action. - - - - - - Example - - First, create an exemplar by - - -let exemplar_ext = ... in -let exemplar = new element_impl exemplar_ext in - - -The exemplar is not used in node trees, but only as -a pattern when the element nodes are created: - - -let element = exemplar # create_element dtd (T_element name) attlist - - -The element is a copy of exemplar -(even the extension exemplar_ext has been copied) -which ensures that element and its extension are objects -of the same class as the exemplars; note that you need not to pass a -class name or other meta information. The copy is initially connected -with the dtd, it gets a node type, and the attribute list -is filled. The element is now fully functional; it can -be added to another element as child, and it can contain references to -subnodes. - - - - - - - The class <literal>data_impl</literal> - -This class is an implementation of node which -should be used for all character data nodes: - - - [ 'ext ] node -]]> - - - - - - Constructor - -You can create a new instance by - - -new data_impl extension_object - - -which creates an empty exemplar node which is connected to -extension_object. The node does not contain a -reference to any DTD, and because of this it cannot be added to node trees. - - - - To get a fully working data node, apply the method -create_data - to the exemplar (see example). - - - - - Example - - First, create an exemplar by - - -let exemplar_ext = ... in -let exemplar = new exemplar_ext data_impl in - - -The exemplar is not used in node trees, but only as -a pattern when the data nodes are created: - - -let data_node = exemplar # create_data dtd "The characters contained in the data node" - - -The data_node is a copy of exemplar. -The copy is initially connected -with the dtd, and it is filled with character material. -The data_node is now fully functional; it can -be added to an element as child. - - - - - - The type <literal>spec</literal> - -The type spec defines a way to handle the details of -creating nodes from exemplars. - - - ?comment_exemplar : 'ext node -> - ?default_pinstr_exemplar : 'ext node -> - ?pinstr_mapping : (string, 'ext node) Hashtbl.t -> - data_exemplar: 'ext node -> - default_element_exemplar: 'ext node -> - element_mapping: (string, 'ext node) Hashtbl.t -> - unit -> - 'ext spec - -val make_spec_from_alist : - ?super_root_exemplar : 'ext node -> - ?comment_exemplar : 'ext node -> - ?default_pinstr_exemplar : 'ext node -> - ?pinstr_alist : (string * 'ext node) list -> - data_exemplar: 'ext node -> - default_element_exemplar: 'ext node -> - element_alist: (string * 'ext node) list -> - unit -> - 'ext spec -]]> - -The two functions make_spec_from_mapping and -make_spec_from_alist create spec -values. Both functions are functionally equivalent and the only difference is -that the first function prefers hashtables and the latter associative lists to -describe mappings from names to exemplars. - - - -You can specify exemplars for the various kinds of nodes that need to be -generated when an XML document is parsed: - - - - ~super_root_exemplar: This exemplar -is used to create the super root. This special node is only created if the -corresponding configuration option has been selected; it is the parent node of -the root node which may be convenient if every working node must have a parent. - - - ~comment_exemplar: This exemplar is -used when a comment node must be created. Note that such nodes are only created -if the corresponding configuration option is "on". - - - - ~default_pinstr_exemplar: If a node -for a processing instruction must be created, and the instruction is not listed -in the table passed by ~pinstr_mapping or -~pinstr_alist, this exemplar is used. -Again the configuration option must be "on" in order to create such nodes at -all. - - - - ~pinstr_mapping or -~pinstr_alist: Map the target names of processing -instructions to exemplars. These mappings are only used when nodes for -processing instructions are created. - - - ~data_exemplar: The exemplar for -ordinary data nodes. - - - ~default_element_exemplar: This -exemplar is used if an element node must be created, but the element type -cannot be found in the tables element_mapping or -element_alist. - - - ~element_mapping or -~element_alist: Map the element types to exemplars. These -mappings are used to create element nodes. - - - -In most cases, you only want to create spec values to pass -them to the parser functions found in Pxp_yacc. However, it -might be useful to apply spec values directly. - - -The following functions create various types of nodes by selecting the -corresponding exemplar from the passed spec value, and by -calling create_element or create_data on -the exemplar. - - - dtd -> - (* data material: *) string -> - 'ext node - -val create_element_node : - ?position:(string * int * int) -> - 'ext spec -> - dtd -> - (* element type: *) string -> - (* attributes: *) (string * string) list -> - 'ext node - -val create_super_root_node : - ?position:(string * int * int) -> - 'ext spec -> - dtd -> - 'ext node - -val create_comment_node : - ?position:(string * int * int) -> - 'ext spec -> - dtd -> - (* comment text: *) string -> - 'ext node - -val create_pinstr_node : - ?position:(string * int * int) -> - 'ext spec -> - dtd -> - proc_instruction -> - 'ext node -]]> - - - - - Examples - - - Building trees. - - Here is the piece of code that creates the tree of -the figure . The extension -object and the DTD are beyond the scope of this example. - - -let exemplar_ext = ... (* some extension *) in -let dtd = ... (* some DTD *) in - -let element_exemplar = new element_impl exemplar_ext in -let data_exemplar = new data_impl exemplar_ext in - -let a1 = element_exemplar # create_element dtd (T_element "a") ["att", "apple"] -and b1 = element_exemplar # create_element dtd (T_element "b") [] -and c1 = element_exemplar # create_element dtd (T_element "c") [] -and a2 = element_exemplar # create_element dtd (T_element "a") ["att", "orange"] -in - -let cherries = data_exemplar # create_data dtd "Cherries" in -let orange = data_exemplar # create_data dtd "An orange" in - -a1 # add_node b1; -a1 # add_node c1; -b1 # add_node a2; -b1 # add_node cherries; -a2 # add_node orange; - - -Alternatively, the last block of statements could also be written as: - - -a1 # set_nodes [b1; c1]; -b1 # set_nodes [a2; cherries]; -a2 # set_nodes [orange]; - - -The root of the tree is a1, i.e. it is true that - - -x # root == a1 - - -for every x from { a1, a2, -b1, c1, cherries, -orange }. - - - -Furthermore, the following properties hold: - - - a1 # attribute "att" = Value "apple" -& a2 # attribute "att" = Value "orange" - -& cherries # data = "Cherries" -& orange # data = "An orange" -& a1 # data = "CherriesAn orange" - -& a1 # node_type = T_element "a" -& a2 # node_type = T_element "a" -& b1 # node_type = T_element "b" -& c1 # node_type = T_element "c" -& cherries # node_type = T_data -& orange # node_type = T_data - -& a1 # sub_nodes = [ b1; c1 ] -& a2 # sub_nodes = [ orange ] -& b1 # sub_nodes = [ a2; cherries ] -& c1 # sub_nodes = [] -& cherries # sub_nodes = [] -& orange # sub_nodes = [] - -& a2 # parent == a1 -& b1 # parent == b1 -& c1 # parent == a1 -& cherries # parent == b1 -& orange # parent == a2 - - - - Searching nodes. - - The following function searches all nodes of a tree -for which a certain condition holds: - - -let rec search p t = - if p t then - t :: search_list p (t # sub_nodes) - else - search_list p (t # sub_nodes) - -and search_list p l = - match l with - [] -> [] - | t :: l' -> (search p t) @ (search_list p l') -;; - - - - - For example, if you want to search all elements of a certain -type et, the function search can be -applied as follows: - - -let search_element_type et t = - search (fun x -> x # node_type = T_element et) t -;; - - - - - Getting attribute values. - - Suppose we have the declaration: - -]]> - - -In this case, every element e must have an attribute -a, otherwise the parser would indicate an error. If -the O'Caml variable n holds the node of the tree -corresponding to the element, you can get the value of the attribute -a by - - -let value_of_a = n # required_string_attribute "a" - - -which is more or less an abbreviation for - - s - | _ -> assert false]]> - - -- as the attribute is required, the attribute method always -returns a Value. - - - - In contrast to this, the attribute b can be -omitted. In this case, the method required_string_attribute -works only if the attribute is there, and the method will fail if the attribute -is missing. To get the value, you can apply the method -optional_string_attribute: - - -let value_of_b = n # optional_string_attribute "b" - - -Now, value_of_b is of type string option, -and None represents the omitted attribute. Alternatively, -you could also use attribute: - - Some s - | Implied_value -> None - | _ -> assert false]]> - - - - The attribute c behaves much like -a, because it has always a value. If the attribute is -omitted, the default, here "12345", will be returned instead. Because of this, -you can again use required_string_attribute to get the -value. - - - The type CDATA is the most general string -type. The types NMTOKEN, ID, -IDREF, ENTITY, and all enumerators and -notations are special forms of string types that restrict the possible -values. From O'Caml, they behave like CDATA, i.e. you can -use the methods required_string_attribute and -optional_string_attribute, too. - - - In contrast to this, the types NMTOKENS, -IDREFS, and ENTITIES mean lists of -strings. Suppose we have the declaration: - -]]> - - -The type NMTOKENS stands for lists of space-separated -tokens; for example the value "1 abc 23ef" means the list -["1"; "abc"; "23ef"]. (Again, IDREFS -and ENTITIES have more restricted values.) To get the -value of attribute d, one can use - - -let value_of_d = n # required_list_attribute "d" - - -or - - l - | _ -> assert false]]> - - -As d is required, the attribute cannot be omitted, and -the attribute method returns always a -Valuelist. - - - For optional attributes like e, apply - - -let value_of_e = n # optional_list_attribute "e" - - -or - - l - | Implied_value -> [] - | _ -> assert false]]> - - -Here, the case that the attribute is missing counts like the empty list. - - - - - - - Iterators - - There are also several iterators in Pxp_document; please see -the mli file for details. You can find examples for them in the -"simple_transformation" directory. - - - f:('ext node -> bool) -> 'ext node -> 'ext node - -val find_all : ?deeply:bool -> - f:('ext node -> bool) -> 'ext node -> 'ext node list - -val find_element : ?deeply:bool -> - string -> 'ext node -> 'ext node - -val find_all_elements : ?deeply:bool -> - string -> 'ext node -> 'ext node list - -exception Skip -val map_tree : pre:('exta node -> 'extb node) -> - ?post:('extb node -> 'extb node) -> - 'exta node -> - 'extb node - - -val map_tree_sibl : - pre: ('exta node option -> 'exta node -> 'exta node option -> - 'extb node) -> - ?post:('extb node option -> 'extb node -> 'extb node option -> - 'extb node) -> - 'exta node -> - 'extb node - -val iter_tree : ?pre:('ext node -> unit) -> - ?post:('ext node -> unit) -> - 'ext node -> - unit - -val iter_tree_sibl : - ?pre: ('ext node option -> 'ext node -> 'ext node option -> unit) -> - ?post:('ext node option -> 'ext node -> 'ext node option -> unit) -> - 'ext node -> - unit -]]> - - - -
- - - - - The class type <literal>extension</literal> - - - - unit - (* "set_node" is invoked once the extension is associated to a new - * node object. - *) - end -]]> - - -This is the type of classes used for node extensions. For every node of the -document tree, there is not only the node object, but also -an extension object. The latter has minimal -functionality; it has only the necessary methods to be attached to the node -object containing the details of the node instance. The extension object is -called extension because its purpose is extensibility. - - For some reasons, it is impossible to derive the -node classes (i.e. element_impl and -data_impl) such that the subclasses can be extended by new -new methods. But -subclassing nodes is a great feature, because it allows the user to provide -different classes for different types of nodes. The extension objects are a -workaround that is as powerful as direct subclassing, the costs are -some notation overhead. - - -
-The structure of nodes and extensions - - -
- - The picture shows how the nodes and extensions are linked -together. Every node has a reference to its extension, and every extension has -a reference to its node. The methods extension and -node follow these references; a typical phrase is - - -self # node # attribute "xy" - - -to get the value of an attribute from a method defined in the extension object; -or - - -self # node # iter - (fun n -> n # extension # my_method ...) - - -to iterate over the subnodes and to call my_method of the -corresponding extension objects. - - - Note that extension objects do not have references to subnodes -(or "subextensions") themselves; in order to get one of the children of an -extension you must first go to the node object, then get the child node, and -finally reach the extension that is logically the child of the extension you -started with. - - - How to define an extension class - - At minimum, you must define the methods -clone, node, and -set_node such that your class is compatible with the type -extension. The method set_node is called -during the initialization of the node, or after a node has been cloned; the -node object invokes set_node on the extension object to tell -it that this node is now the object the extension is linked to. The extension -must return the node object passed as argument of set_node -when the node method is called. - - The clone method must return a copy of the -extension object; at least the object itself must be duplicated, but if -required, the copy should deeply duplicate all objects and values that are -referred by the extension, too. Whether this is required, depends on the -application; clone is invoked by the node object when one of -its cloning methods is called. - - A good starting point for an extension class: - - -} - - method node = - match node with - None -> - assert false - | Some n -> n - - method set_node n = - node <- Some n - - end -]]> - - -This class is compatible with extension. The purpose of -defining such a class is, of course, adding further methods; and you can do it -without restriction. - - - Often, you want not only one extension class. In this case, -it is the simplest way that all your classes (for one kind of document) have -the same type (with respect to the interface; i.e. it does not matter if your -classes differ in the defined private methods and instance variables, but -public methods count). This approach avoids lots of coercions and problems with -type incompatibilities. It is simple to implement: - - - - - -If a class does not need a method (e.g. because it does not make sense, or it -would violate some important condition), it is possible to define the method -and to always raise an exception when the method is invoked -(e.g. assert false). - - - The latter is a strong recommendation: do not try to further -specialize the types of extension objects. It is difficult, sometimes even -impossible, and almost never worth-while. - - - - How to bind extension classes to element types - - Once you have defined your extension classes, you can bind them -to element types. The simplest case is that you have only one class and that -this class is to be always used. The parsing functions in the module -Pxp_yacc take a spec argument which -can be customized. If your single class has the name c, -this argument should be - - -let spec = - make_spec_from_alist - ~data_exemplar: (new data_impl c) - ~default_element_exemplar: (new element_impl c) - ~element_alist: [] - () - - -This means that data nodes will be created from the exemplar passed by -~data_exemplar and that all element nodes will be made from the exemplar -specified by ~default_element_exemplar. In ~element_alist, you can -pass that different exemplars are to be used for different element types; but -this is an optional feature. If you do not need it, pass the empty list. - - - -Remember that an exemplar is a (node, extension) pair that serves as pattern -when new nodes (and the corresponding extension objects) are added to the -document tree. In this case, the exemplar contains c as -extension, and when nodes are created, the exemplar is cloned, and cloning -makes also a copy of c such that all nodes of the document -tree will have a copy of c as extension. - - - The ~element_alist argument can bind -specific element types to specific exemplars; as exemplars may be instances of -different classes it is effectively possible to bind element types to -classes. For example, if the element type "p" is implemented by class "c_p", -and "q" is realized by "c_q", you can pass the following value: - - -let spec = - make_spec_from_alist - ~data_exemplar: (new data_impl c) - ~default_element_exemplar: (new element_impl c) - ~element_alist: - [ "p", new element_impl c_p; - "q", new element_impl c_q; - ] - () - - -The extension object c is still used for all data nodes and -for all other element types. - - - - -
- - - - - Details of the mapping from XML text to the tree representation - - - - The representation of character-free elements - - If an element declaration does not allow the element to -contain character data, the following rules apply. - - If the element must be empty, i.e. it is declared with the -keyword EMPTY, the element instance must be effectively -empty (it must not even contain whitespace characters). The parser guarantees -that a declared EMPTY element does never contain a data -node, even if the data node represents the empty string. - - If the element declaration only permits other elements to occur -within that element but not character data, it is still possible to insert -whitespace characters between the subelements. The parser ignores these -characters, too, and does not create data nodes for them. - - - Example. - - Consider the following element types: - - - - -]]> - -Only x may contain character data, the keyword -#PCDATA indicates this. The other types are character-free. - - - - The XML term - - -]]> - -will be internally represented by an element node for x -with three subnodes: the first z element, a data node -containing the space character, and the second z element. -In contrast to this, the term - - -]]> - -is represented by an element node for y with only -two subnodes, the two z elements. There -is no data node for the space character because spaces are ignored in the -character-free element y. - - - - - - The representation of character data - - The XML specification allows all Unicode characters in XML -texts. This parser can be configured such that UTF-8 is used to represent the -characters internally; however, the default character encoding is -ISO-8859-1. (Currently, no other encodings are possible for the internal string -representation; the type Pxp_types.rep_encoding enumerates -the possible encodings. Principially, the parser could use any encoding that is -ASCII-compatible, but there are currently only lexical analyzers for UTF-8 and -ISO-8859-1. It is currently impossible to use UTF-16 or UCS-4 as internal -encodings (or other multibyte encodings which are not ASCII-compatible) unless -major parts of the parser are rewritten - unlikely...) - - - -The internal encoding may be different from the external encoding (specified -in the XML declaration <?xml ... encoding="..."?>); in -this case the strings are automatically converted to the internal encoding. - - - -If the internal encoding is ISO-8859-1, it is possible that there are -characters that cannot be represented. In this case, the parser ignores such -characters and prints a warning (to the collect_warning -object that must be passed when the parser is called). - - - The XML specification allows lines to be separated by single LF -characters, by CR LF character sequences, or by single CR -characters. Internally, these separators are always converted to single LF -characters. - - The parser guarantees that there are never two adjacent data -nodes; if necessary, data material that would otherwise be represented by -several nodes is collapsed into one node. Note that you can still create node -trees with adjacent data nodes; however, the parser does not return such trees. - - - Note that CDATA sections are not represented specially; such -sections are added to the current data material that being collected for the -next data node. - - - - - The representation of entities within documents - - Entities are not represented within -documents! If the parser finds an entity reference in the document -content, the reference is immediately expanded, and the parser reads the -expansion text instead of the reference. - - - - - The representation of attributes As attribute -values are composed of Unicode characters, too, the same problems with the -character encoding arise as for character material. Attribute values are -converted to the internal encoding, too; and if there are characters that -cannot be represented, these are dropped, and a warning is printed. - - Attribute values are normalized before they are returned by -methods like attribute. First, any remaining entity -references are expanded; if necessary, expansion is performed recursively. -Second, newline characters (any of LF, CR LF, or CR characters) are converted -to single space characters. Note that especially the latter action is -prescribed by the XML standard (but is not converted -such that it is still possible to include line feeds into attributes). - - - - - The representation of processing instructions -Processing instructions are parsed to some extent: The first word of the -PI is called the target, and it is stored separated from the rest of the PI: - - -]]> - -The exact location where a PI occurs is not represented (by default). The -parser puts the PI into the object that represents the embracing construct (an -element, a DTD, or the whole document); that means you can find out which PIs -occur in a certain element, in the DTD, or in the whole document, but you -cannot lookup the exact position within the construct. - - - If you require the exact location of PIs, it is possible to -create extra nodes for them. This mode is controled by the option -enable_pinstr_nodes. The additional nodes have the node type -T_pinstr target, and are created -from special exemplars contained in the spec (see -pxp_document.mli). - - - - The representation of comments - -Normally, comments are not represented; they are dropped by -default. However, if you require them, it is possible to create -T_comment nodes for them. This mode can be specified by the -option enable_comment_nodes. Comment nodes are created from -special exemplars contained in the spec (see -pxp_document.mli). You can access the contents of comments through the -method comment. - - - - The attributes <literal>xml:lang</literal> and -<literal>xml:space</literal> - - These attributes are not supported specially; they are handled -like any other attribute. - - - - - And what about namespaces? - Currently, there is no special support for namespaces. -However, the parser allows it that the colon occurs in names such that it is -possible to implement namespaces on top of the current API. - - Some future release of PXP will support namespaces as built-in -feature... - - - - -
- - - - - Configuring and calling the parser - - - - - - - Overview - -There are the following main functions invoking the parser (in Pxp_yacc): - - - - parse_document_entity: You want to -parse a complete and closed document consisting of a DTD and the document body; -the body is validated against the DTD. This mode is interesting if you have a -file - - ... -]]> - -and you can accept any DTD that is included in the file (e.g. because the file -is under your control). - - - - parse_wfdocument_entity: You want to -parse a complete and closed document consisting of a DTD and the document body; -but the body is not validated, only checked for well-formedness. This mode is -preferred if validation costs too much time or if the DTD is missing. - - - - parse_dtd_entity: You want only to -parse an entity (file) containing the external subset of a DTD. Sometimes it is -interesting to read such a DTD, for example to compare it with the DTD included -in a document, or to apply the next mode: - - - - parse_content_entity: You want only to -parse an entity (file) containing a fragment of a document body; this fragment -is validated against the DTD you pass to the function. Especially, the fragment -must not have a <!DOCTYPE> clause, and must directly -begin with an element. The element is validated against the DTD. This mode is -interesting if you want to check documents against a fixed, immutable DTD. - - - - parse_wfcontent_entity: This function -also parses a single element without DTD, but does not validate it. - - - extract_dtd_from_document_entity: This -function extracts the DTD from a closed document consisting of a DTD and a -document body. Both the internal and the external subsets are extracted. - - - - - -In many cases, parse_document_entity is the preferred mode -to parse a document in a validating way, and -parse_wfdocument_entity is the mode of choice to parse a -file while only checking for well-formedness. - - - -There are a number of variations of these modes. One important application of a -parser is to check documents of an untrusted source against a fixed DTD. One -solution is to not allow the <!DOCTYPE> clause in -these documents, and treat the document like a fragment (using mode -parse_content_entity). This is very simple, but -inflexible; users of such a system cannot even define additional entities to -abbreviate frequent phrases of their text. - - - -It may be necessary to have a more intelligent checker. For example, it is also -possible to parse the document to check fully, i.e. with DTD, and to compare -this DTD with the prescribed one. In order to fully parse the document, mode -parse_document_entity is applied, and to get the DTD to -compare with mode parse_dtd_entity can be used. - - - -There is another very important configurable aspect of the parser: the -so-called resolver. The task of the resolver is to locate the contents of an -(external) entity for a given entity name, and to make the contents accessible -as a character stream. (Furthermore, it also normalizes the character set; -but this is a detail we can ignore here.) Consider you have a file called -"main.xml" containing - - -%sub; -]]> - -and a file stored in the subdirectory "sub" with name -"sub.xml" containing - - -%subsub; -]]> - -and a file stored in the subdirectory "subsub" of -"sub" with name "subsub.xml" (the -contents of this file do not matter). Here, the resolver must track that -the second entity subsub is located in the directory -"sub/subsub", i.e. the difficulty is to interpret the -system (file) names of entities relative to the entities containing them, -even if the entities are deeply nested. - - - -There is not a fixed resolver already doing everything right - resolving entity -names is a task that highly depends on the environment. The XML specification -only demands that SYSTEM entities are interpreted like URLs -(which is not very precise, as there are lots of URL schemes in use), hoping -that this helps overcoming the local peculiarities of the environment; the idea -is that if you do not know your environment you can refer to other entities by -denoting URLs for them. I think that this interpretation of -SYSTEM names may have some applications in the internet, but -it is not the first choice in general. Because of this, the resolver is a -separate module of the parser that can be exchanged by another one if -necessary; more precisely, the parser already defines several resolvers. - - - -The following resolvers do already exist: - - - - Resolvers reading from arbitrary input channels. These -can be configured such that a certain ID is associated with the channel; in -this case inner references to external entities can be resolved. There is also -a special resolver that interprets SYSTEM IDs as URLs; this resolver can -process relative SYSTEM names and determine the corresponding absolute URL. - - - - A resolver that reads always from a given O'Caml -string. This resolver is not able to resolve further names unless the string is -not associated with any name, i.e. if the document contained in the string -refers to an external entity, this reference cannot be followed in this -case. - - - A resolver for file names. The SYSTEM -name is interpreted as file URL with the slash "/" as separator for -directories. - This resolver is derived from the generic URL resolver. - - - -The interface a resolver must have is documented, so it is possible to write -your own resolver. For example, you could connect the parser with an HTTP -client, and resolve URLs of the HTTP namespace. The resolver classes support -that several independent resolvers are combined to one more powerful resolver; -thus it is possible to combine a self-written resolver with the already -existing resolvers. - - - -Note that the existing resolvers only interpret SYSTEM -names, not PUBLIC names. If it helps you, it is possible to -define resolvers for PUBLIC names, too; for example, such a -resolver could look up the public name in a hash table, and map it to a system -name which is passed over to the existing resolver for system names. It is -relatively simple to provide such a resolver. - - - - - - - Resolvers and sources - - - Using the built-in resolvers (called sources) - - The type source enumerates the two -possibilities where the document to parse comes from. - - -type source = - Entity of ((dtd -> Pxp_entity.entity) * Pxp_reader.resolver) - | ExtID of (ext_id * Pxp_reader.resolver) - - -You normally need not to worry about this type as there are convenience -functions that create source values: - - - - - from_file s: The document is read from -file s; you may specify absolute or relative path names. -The file name must be encoded as UTF-8 string. - - -There is an optional argument ~system_encoding -specifying the character encoding which is used for the names of the file -system. For example, if this encoding is ISO-8859-1 and s is -also a ISO-8859-1 string, you can form the source: - - - - - -This source has the advantage that -it is able to resolve inner external entities; i.e. if your document includes -data from another file (using the SYSTEM attribute), this -mode will find that file. However, this mode cannot resolve -PUBLIC identifiers nor SYSTEM identifiers -other than "file:". - - - - from_channel ch: The document is read -from the channel ch. In general, this source also supports -file URLs found in the document; however, by default only absolute URLs are -understood. It is possible to associate an ID with the channel such that the -resolver knows how to interpret relative URLs: - - -from_channel ~id:(System "file:///dir/dir1/") ch - - -There is also the ~system_encoding argument specifying how file names are -encoded. - The example from above can also be written (but it is no -longer possible to interpret relative URLs because there is no ~id argument, -and computing this argument is relatively complicated because it must -be a valid URL): - - -let ch = open_in s in -let src = from_channel ~system_encoding:`Enc_iso88591 ch in -...; -close_in ch - - - - - from_string s: The string -s is the document to parse. This mode is not able to -interpret file names of SYSTEM clauses, nor it can look up -PUBLIC identifiers. - - Normally, the encoding of the string is detected as usual -by analyzing the XML declaration, if any. However, it is also possible to -specify the encoding directly: - - -let src = from_string ~fixenc:`ISO-8859-2 s - - - - - ExtID (id, r): The document to parse -is denoted by the identifier id (either a -SYSTEM or PUBLIC clause), and this -identifier is interpreted by the resolver r. Use this mode -if you have written your own resolver. - Which character sets are possible depends on the passed -resolver r. - - - Entity (get_entity, r): The document -to parse is returned by the function invocation get_entity -dtd, where dtd is the DTD object to use (it may be -empty). Inner external references occuring in this entity are resolved using -the resolver r. - Which character sets are possible depends on the passed -resolver r. - - - - - - - The resolver API - - A resolver is an object that can be opened like a file, but you -do not pass the file name to the resolver, but the XML identifier of the entity -to read from (either a SYSTEM or PUBLIC -clause). When opened, the resolver must return the -Lexing.lexbuf that reads the characters. The resolver can -be closed, and it can be cloned. Furthermore, it is possible to tell the -resolver which character set it should assume. - The following from Pxp_reader: - - unit - method init_warner : collect_warnings -> unit - method rep_encoding : rep_encoding - method open_in : ext_id -> Lexing.lexbuf - method close_in : unit - method change_encoding : string -> unit - method clone : resolver - method close_all : unit - end -]]> - -The resolver object must work as follows: - - - - - When the parser is called, it tells the resolver the -warner object and the internal encoding by invoking -init_warner and init_rep_encoding. The -resolver should store these values. The method rep_encoding -should return the internal encoding. - - - - If the parser wants to read from the resolver, it invokes -the method open_in. Either the resolver succeeds, in which -case the Lexing.lexbuf reading from the file or stream must -be returned, or opening fails. In the latter case the method implementation -should raise an exception (see below). - - - If the parser finishes reading, it calls the -close_in method. - - - If the parser finds a reference to another external -entity in the input stream, it calls clone to get a second -resolver which must be initially closed (not yet connected with an input -stream). The parser then invokes open_in and the other -methods as described. - - - If you already know the character set of the input -stream, you should recode it to the internal encoding, and define the method -change_encoding as an empty method. - - - If you want to support multiple external character sets, -the object must follow a much more complicated protocol. Directly after -open_in has been called, the resolver must return a lexical -buffer that only reads one byte at a time. This is only possible if you create -the lexical buffer with Lexing.from_function; the function -must then always return 1 if the EOF is not yet reached, and 0 if EOF is -reached. If the parser has read the first line of the document, it will invoke -change_encoding to tell the resolver which character set to -assume. From this moment, the object can return more than one byte at once. The -argument of change_encoding is either the parameter of the -"encoding" attribute of the XML declaration, or the empty string if there is -not any XML declaration or if the declaration does not contain an encoding -attribute. - - At the beginning the resolver must only return one -character every time something is read from the lexical buffer. The reason for -this is that you otherwise would not exactly know at which position in the -input stream the character set changes. - - If you want automatic recognition of the character set, -it is up to the resolver object to implement this. - - - If an error occurs, the parser calls the method -close_all for the top-level resolver; this method should -close itself (if not already done) and all clones. - - - - Exceptions - -It is possible to chain resolvers such that when the first resolver is not able -to open the entity, the other resolvers of the chain are tried in turn. The -method open_in should raise the exception -Not_competent to indicate that the next resolver should try -to open the entity. If the resolver is able to handle the ID, but some other -error occurs, the exception Not_resolvable should be raised -to force that the chain breaks. - - - - Example: How to define a resolver that is equivalent to -from_string: ... - - - - - Predefined resolver components - -There are some classes in Pxp_reader that define common resolver behaviour. - - - ?fixenc:encoding -> - ?auto_close:bool -> - in_channel -> - resolver -]]> - -Reads from the passed channel (it may be even a pipe). If the -~id argument is passed to the object, the created resolver -accepts only this ID. Otherwise all IDs are accepted. - Once the resolver has -been cloned, it does not accept any ID. This means that this resolver cannot -handle inner references to external entities. Note that you can combine this -resolver with another resolver that can handle inner references (such as -resolve_as_file); see class 'combine' below. - If you pass the -~fixenc argument, the encoding of the channel is set to the -passed value, regardless of any auto-recognition or any XML declaration. - If -~auto_close = true (which is the default), the channel is -closed after use. If ~auto_close = false, the channel is -left open. - - - - - channel_of_id:(ext_id -> (in_channel * encoding option)) -> - resolver -]]> - -This resolver calls the function ~channel_of_id to open a -new channel for the passed ext_id. This function must either -return the channel and the encoding, or it must fail with Not_competent. The -function must return None as encoding if the default -mechanism to recognize the encoding should be used. It must return -Some e if it is already known that the encoding of the -channel is e. If ~auto_close = true -(which is the default), the channel is closed after use. If -~auto_close = false, the channel is left open. - - - - - ?auto_close:bool -> - url_of_id:(ext_id -> Neturl.url) -> - channel_of_url:(Neturl.url -> (in_channel * encoding option)) -> - resolver -]]> - -When this resolver gets an ID to read from, it calls the function -~url_of_id to get the corresponding URL. This URL may be a -relative URL; however, a URL scheme must be used which contains a path. The -resolver converts the URL to an absolute URL if necessary. The second -function, ~channel_of_url, is fed with the absolute URL as -input. This function opens the resource to read from, and returns the channel -and the encoding of the resource. - - -Both functions, ~url_of_id and -~channel_of_url, can raise Not_competent to indicate that -the object is not able to read from the specified resource. However, there is a -difference: A Not_competent from ~url_of_id is left as it -is, but a Not_competent from ~channel_of_url is converted to -Not_resolvable. So only ~url_of_id decides which URLs are -accepted by the resolver and which not. - - -The function ~channel_of_url must return -None as encoding if the default mechanism to recognize the -encoding should be used. It must return Some e if it is -already known that the encoding of the channel is e. - - -If ~auto_close = true (which is the default), the channel is -closed after use. If ~auto_close = false, the channel is -left open. - - -Objects of this class contain a base URL relative to which relative URLs are -interpreted. When creating a new object, you can specify the base URL by -passing it as ~base_url argument. When an existing object is -cloned, the base URL of the clone is the URL of the original object. - Note -that the term "base URL" has a strict definition in RFC 1808. - - - - - ?fixenc:encoding -> - string -> - resolver -]]> - -Reads from the passed string. If the ~id argument is passed -to the object, the created resolver accepts only this ID. Otherwise all IDs are -accepted. - Once the resolver has been cloned, it does not accept any ID. This -means that this resolver cannot handle inner references to external -entities. Note that you can combine this resolver with another resolver that -can handle inner references (such as resolve_as_file); see class 'combine' -below. - If you pass the ~fixenc argument, the encoding of -the string is set to the passed value, regardless of any auto-recognition or -any XML declaration. - - - - (string * encoding option)) -> - resolver -]]> - -This resolver calls the function ~string_of_id to get the -string for the passed ext_id. This function must either -return the string and the encoding, or it must fail with Not_competent. The -function must return None as encoding if the default -mechanism to recognize the encoding should be used. It must return -Some e if it is already known that the encoding of the -string is e. - - - - - ?host_prefix:[ `Not_recognized | `Allowed | `Required ] -> - ?system_encoding:encoding -> - ?url_of_id:(ext_id -> Neturl.url) -> - ?channel_of_url: (Neturl.url -> (in_channel * encoding option)) -> - unit -> - resolver -]]> -Reads from the local file system. Every file name is interpreted as -file name of the local file system, and the referred file is read. - - -The full form of a file URL is: file://host/path, where -'host' specifies the host system where the file identified 'path' -resides. host = "" or host = "localhost" are accepted; other values -will raise Not_competent. The standard for file URLs is -defined in RFC 1738. - - -Option ~file_prefix: Specifies how the "file:" prefix of -file names is handled: - - - `Not_recognized:The prefix is not -recognized. - - - `Allowed: The prefix is allowed but -not required (the default). - - - `Required: The prefix is -required. - - - - -Option ~host_prefix: Specifies how the "//host" phrase of -file names is handled: - - - `Not_recognized:The prefix is not -recognized. - - - `Allowed: The prefix is allowed but -not required (the default). - - - `Required: The prefix is -required. - - - - -Option ~system_encoding: Specifies the encoding of file -names of the local file system. Default: UTF-8. - - -Options ~url_of_id, ~channel_of_url: Not -for the casual user! - - - - - resolver list -> - resolver -]]> - -Combines several resolver objects. If a concrete entity with an -ext_id is to be opened, the combined resolver tries the -contained resolvers in turn until a resolver accepts opening the entity -(i.e. it does not raise Not_competent on open_in). - - -Clones: If the 'clone' method is invoked before 'open_in', all contained -resolvers are cloned separately and again combined. If the 'clone' method is -invoked after 'open_in' (i.e. while the resolver is open), additionally the -clone of the active resolver is flagged as being preferred, i.e. it is tried -first. - - - - - - - The DTD classes Sorry, not yet -written. Perhaps the interface definition of Pxp_dtd expresses the same: - - -&markup-dtd1.mli;&markup-dtd2.mli; - - - - - Invoking the parser - - Here a description of Pxp_yacc. - - - Defaults - The following defaults are available: - - -val default_config : config -val default_extension : ('a node extension) as 'a -val default_spec : ('a node extension as 'a) spec - - - - - - Parsing functions - In the following, the term "closed document" refers to -an XML structure like - - -<!DOCTYPE ... [ declarations ] > -<root> -... -</root> - - -The term "fragment" refers to an XML structure like - - -<root> -... -</root> - - -i.e. only to one isolated element instance. - - - - source -> dtd -]]> - -Parses the declarations which are contained in the entity, and returns them as -dtd object. - - - - source -> dtd -]]> - -Extracts the DTD from a closed document. Both the internal and the external -subsets are extracted and combined to one dtd object. This -function does not parse the whole document, but only the parts that are -necessary to extract the DTD. - - - - dtd) -> - ?id_index:('ext index) -> - config -> - source -> - 'ext spec -> - 'ext document -]]> - -Parses a closed document and validates it against the DTD that is contained in -the document (internal and external subsets). The option -~transform_dtd can be used to transform the DTD in the -document, and to use the transformed DTD for validation. If -~id_index is specified, an index of all ID attributes is -created. - - - - - source -> - 'ext spec -> - 'ext document -]]> - -Parses a closed document, but checks it only on well-formedness. - - - - - config -> - source -> - dtd -> - 'ext spec -> - 'ext node -]]> - -Parses a fragment, and validates the element. - - - - - source -> - 'ext spec -> - 'ext node -]]> - -Parses a fragment, but checks it only on well-formedness. - - - - - Configuration options - - - - - - warner:The parser prints -warnings by invoking the method warn for this warner -object. (Default: all warnings are dropped) - - errors_with_line_numbers:If -true, errors contain line numbers; if false, errors contain only byte -positions. The latter mode is faster. (Default: true) - - enable_pinstr_nodes:If true, -the parser creates extra nodes for processing instructions. If false, -processing instructions are simply added to the element or document surrounding -the instructions. (Default: false) - - enable_super_root_node:If -true, the parser creates an extra node which is the parent of the root of the -document tree. This node is called super root; it is an element with type -T_super_root. - If there are processing instructions outside -the root element and outside the DTD, they are added to the super root instead -of the document. - If false, the super root node is not created. (Default: -false) - - enable_comment_nodes:If true, -the parser creates nodes for comments with type T_comment; -if false, such nodes are not created. (Default: false) - - encoding:Specifies the -internal encoding of the parser. Most strings are then represented according to -this encoding; however there are some exceptions (especially -ext_id values which are always UTF-8 encoded). -(Default: `Enc_iso88591) - - -recognize_standalone_declaration: If true and if the parser is -validating, the standalone="yes" declaration forces that it -is checked whether the document is a standalone document. - If false, or if the -parser is in well-formedness mode, such declarations are ignored. -(Default: true) - - - store_element_positions: If -true, for every non-data node the source position is stored. If false, the -position information is lost. If available, you can get the positions of nodes -by invoking the position method. -(Default: true) - - idref_pass:If true and if -there is an ID index, the parser checks whether every IDREF or IDREFS attribute -refer to an existing node; this requires that the parser traverses the whole -doument tree. If false, this check is left out. (Default: false) - - validate_by_dfa:If true and if -the content model for an element type is deterministic, a deterministic finite -automaton is used to validate whether the element contents match the content -model of the type. If false, or if a DFA is not available, a backtracking -algorithm is used for validation. (Default: true) - - - -accept_only_deterministic_models: If true, only deterministic content -models are accepted; if false, any syntactically correct content models can be -processed. (Default: true) - - - - - - Which configuration should I use? - First, I recommend to vary the default configuration instead of -creating a new configuration record. For instance, to set -idref_pass to true, change the default -as in: - -let config = { default_config with idref_pass = true } - -The background is that I can add more options to the record in future versions -of the parser without breaking your programs. - - - Do I need extra nodes for processing instructions? -By default, such nodes are not created. This does not mean that the -processing instructions are lost; however, you cannot find out the exact -location where they occur. For example, the following XML text - - -]]> - -will normally create one element node for x containing -one subnode for y. The processing -instructions are attached to x in a separate hash table; you -can access them using x # pinstr "pi1" and x # -pinstr "pi2", respectively. The information is lost where the -instructions occur within x. - - - - If the option enable_pinstr_nodes is -turned on, the parser creates extra nodes pi1 and -pi2 such that the subnodes of x are now: - - - -The extra nodes contain the processing instructions in the usual way, i.e. you -can access them using pi1 # pinstr "pi1" and pi2 # -pinstr "pi2", respectively. - - - Note that you will need an exemplar for the PI nodes (see -make_spec_from_alist). - - - Do I need a super root node? - By default, there is no super root node. The -document object refers directly to the node representing the -root element of the document, i.e. - - - -if r is the root node. This is sometimes inconvenient: (1) -Some algorithms become simpler if every node has a parent, even the root -node. (2) Some standards such as XPath call the "root node" the node whose -child represents the root of the document. (3) The super root node can serve -as a container for processing instructions outside the root element. Because of -these reasons, it is possible to create an extra super root node, whose child -is the root node: - - - -When extra nodes are also created for processing instructions, these nodes can -be added to the super root node if they occur outside the root element (reason -(3)), and the order reflects the order in the source text. - - - Note that you will need an exemplar for the super root node -(see make_spec_from_alist). - - - What is the effect of the UTF-8 encoding? - By default, the parser represents strings (with few -exceptions) as ISO-8859-1 strings. These are well-known, and there are tools -and fonts for this encoding. - - However, internationalization may require that you switch over -to UTF-8 encoding. In most environments, the immediate effect will be that you -cannot read strings with character codes >= 160 any longer; your terminal will -only show funny glyph combinations. It is strongly recommended to install -Unicode fonts (GNU Unifont, - -Markus Kuhn's fonts) and terminal emulators -that can handle UTF-8 byte sequences. Furthermore, a Unicode editor may -be helpful (such as Yudit). There are -also FAQ by -Markus Kuhn. - - By setting encoding to -`Enc_utf8 all strings originating from the parsed XML -document are represented as UTF-8 strings. This includes not only character -data and attribute values but also element names, attribute names and so on, as -it is possible to use any Unicode letter to form such names. Strictly -speaking, PXP is only XML-compliant if the UTF-8 mode is used; otherwise it -will have difficulties when validating documents containing -non-ISO-8859-1-names. - - - This mode does not have any impact on the external -representation of documents. The character set assumed when reading a document -is set in the XML declaration, and character set when writing a document must -be passed to the write method. - - - - How do I check that nodes exist which are referred by IDREF attributes? - First, you must create an index of all occurring ID -attributes: - - - -This index must be passed to the parsing function: - - index) - config source spec -]]> - -Next, you must turn on the idref_pass mode: - - - -Note that now the whole document tree will be traversed, and every node will be -checked for IDREF and IDREFS attributes. If the tree is big, this may take some -time. - - - - - What are deterministic content models? - These type of models can speed up the validation checks; -furthermore they ensure SGML-compatibility. In particular, a content model is -deterministic if the parser can determine the actually used alternative by -inspecting only the current token. For example, this element has -non-deterministic contents: - - -]]> - -If the first element in x is u, the -parser does not know which of the alternatives (u,v) or -(u,y+) will work; the parser must also inspect the second -element to be able to distinguish between the alternatives. Because such -look-ahead (or "guessing") is required, this example is -non-deterministic. - - - The XML standard demands that content models must be -deterministic. So it is recommended to turn the option -accept_only_deterministic_models on; however, PXP can also -process non-deterministic models using a backtracking algorithm. - - Deterministic models ensure that validation can be performed in -linear time. In order to get the maximum benefits, PXP also implements a -special validator that profits from deterministic models; this is the -deterministic finite automaton (DFA). This validator is enabled per element -type if the element type has a deterministic model and if the option -validate_by_dfa is turned on. - - In general, I expect that the DFA method is faster than the -backtracking method; especially in the worst case the DFA takes only linear -time. However, if the content model has only few alternatives and the -alternatives do not nest, the backtracking algorithm may be better. - - - - - - - - - Updates - - Some (often later added) features that are otherwise -not explained in the manual but worth to be mentioned. - - - Methods node_position, node_path, nth_node, -previous_node, next_node for nodes: See pxp_document.mli - - Functions to determine the document order of nodes: -compare, create_ord_index, ord_number, ord_compare: See pxp_document.mli - - - - - - - - - diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/extension_general.fig b/helm/DEVEL/pxp/pxp/doc/manual/src/pic/extension_general.fig deleted file mode 100644 index 445095f07..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/extension_general.fig +++ /dev/null @@ -1,47 +0,0 @@ -#FIG 3.2 -Portrait -Center -Metric -A4 -100.00 -Single --2 -1200 2 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 1575 2250 229 229 1575 2250 1800 2295 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 1575 3375 225 225 1575 3375 1800 3375 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 675 3375 229 229 675 3375 900 3420 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 2475 3375 229 229 2475 3375 2700 3420 -1 3 0 1 0 7 100 0 10 0.000 1 0.0000 3600 2475 180 180 3600 2475 3780 2475 -1 3 0 1 0 7 100 0 10 0.000 1 0.0000 2880 2475 180 180 2880 2475 3060 2475 -1 3 0 1 0 7 100 0 10 0.000 1 0.0000 4320 2475 186 186 4320 2475 4500 2520 -1 3 0 1 0 7 100 0 10 0.000 1 0.0000 3600 1485 186 186 3600 1485 3780 1530 -2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 2 - 675 3150 1395 2385 -2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 2 - 1575 2475 1575 3150 -2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 2 - 1755 2385 2475 3150 -2 1 1 1 0 7 100 0 -1 4.000 0 0 -1 1 0 2 - 0 0 1.00 60.00 120.00 - 1537 2010 3412 1462 -2 1 1 1 0 7 100 0 -1 4.000 0 0 -1 1 0 2 - 0 0 1.00 60.00 120.00 - 3412 1537 1672 2047 -2 1 1 1 0 7 100 0 -1 4.000 0 0 -1 1 1 2 - 0 0 1.00 60.00 120.00 - 0 0 1.00 60.00 120.00 - 810 3195 2707 2512 -2 1 1 1 0 7 100 0 -1 4.000 0 0 -1 1 1 2 - 0 0 1.00 60.00 120.00 - 0 0 1.00 60.00 120.00 - 1740 3217 3442 2580 -2 1 1 1 0 7 100 0 -1 4.000 0 0 -1 1 1 2 - 0 0 1.00 60.00 120.00 - 0 0 1.00 60.00 120.00 - 2640 3210 4177 2610 -4 0 0 80 0 14 12 0.0000 4 75 105 3555 1530 x\001 -4 0 0 80 0 14 12 0.0000 4 75 105 1530 2295 n\001 -4 0 0 80 0 12 12 0.2967 4 135 1365 1658 1950 n # extension\001 -4 0 0 80 0 12 12 0.2967 4 135 840 2475 1950 x # node\001 -4 0 0 80 0 16 12 0.0000 4 135 1140 1020 4050 The node tree\001 -4 0 0 80 0 16 12 0.0000 4 135 1245 3225 3285 The extensions\001 diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_add.fig b/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_add.fig deleted file mode 100644 index 071683488..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_add.fig +++ /dev/null @@ -1,107 +0,0 @@ -#FIG 3.2 -Portrait -Center -Metric -A4 -100.00 -Single --2 -1200 2 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 6141 1350 242 229 6141 1350 6379 1395 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 6141 2250 242 229 6141 2250 6379 2295 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 5426 2250 242 229 5426 2250 5665 2295 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 6856 2250 242 229 6856 2250 7094 2295 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 7571 2925 242 229 7571 2925 7809 2970 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 8524 2925 242 229 8524 2925 8762 2970 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 8047 2250 242 229 8047 2250 8285 2295 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 1866 1350 242 229 1866 1350 2104 1395 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 1866 2250 242 229 1866 2250 2104 2295 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 1151 2250 242 229 1151 2250 1390 2295 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 2581 2250 242 229 2581 2250 2819 2295 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 3296 2925 242 229 3296 2925 3534 2970 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 4249 2925 242 229 4249 2925 4487 2970 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 3772 2250 242 229 3772 2250 4010 2295 -1 1 0 1 0 7 100 0 15 0.000 1 0.0000 8325 1350 242 229 8325 1350 8563 1395 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.76 123.53 - 5910 1440 5402 2017 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.76 123.53 - 6109 1590 6101 2025 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.76 123.53 - 6307 1537 6697 2070 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.76 123.53 - 7832 2347 7602 2692 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.76 123.53 - 8150 2452 8349 2752 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.76 123.53 - 5490 2017 5958 1492 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.76 123.53 - 6164 2010 6173 1575 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.76 123.53 - 6768 2025 6355 1470 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.76 123.53 - 7673 2715 7880 2415 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.76 123.53 - 8412 2707 8222 2415 -2 1 1 1 0 7 95 0 15 4.000 0 0 -1 0 0 2 - 6387 1372 8023 2017 -2 2 0 1 0 7 95 0 -1 0.000 0 0 -1 0 0 5 - 4950 900 9000 900 9000 3375 4950 3375 4950 900 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.75 123.51 - 1635 1440 1127 2017 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.75 123.51 - 1834 1590 1826 2025 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.75 123.51 - 2032 1537 2422 2070 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.75 123.51 - 3557 2347 3327 2692 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 61.75 123.51 - 3875 2452 4074 2752 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.75 123.51 - 1215 2017 1683 1492 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.75 123.51 - 1889 2010 1898 1575 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.75 123.51 - 2493 2025 2080 1470 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.75 123.51 - 3398 2715 3605 2415 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 61.75 123.51 - 4137 2707 3947 2415 -2 1 1 1 0 7 95 0 15 4.000 0 0 -1 0 0 2 - 2112 1372 3748 2017 -2 2 0 1 0 7 95 0 -1 0.000 0 0 -1 0 0 5 - 675 900 4725 900 4725 3375 675 3375 675 900 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 8197 1545 8055 2010 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 8137 2025 8280 1590 -2 1 0 3 0 7 95 0 -1 0.000 0 0 -1 1 0 4 - 2 1 2.00 120.00 180.00 - 7875 1500 7620 1965 7845 1920 7485 2355 -4 0 0 95 0 14 13 0.0000 4 79 111 6094 1379 x\001 -4 0 0 95 0 14 13 0.0000 4 111 111 7991 2265 y\001 -4 0 0 95 0 14 13 0.0000 4 79 111 1819 1379 x\001 -4 0 0 95 0 14 13 0.0000 4 111 111 3716 2265 y\001 -4 0 0 95 0 12 12 0.0000 4 150 1470 6459 1335 x # add_node y\001 -4 0 0 95 0 12 12 0.0000 4 150 1470 2214 1365 x # add_node y\001 diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_clone.fig b/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_clone.fig deleted file mode 100644 index ed1865f87..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_clone.fig +++ /dev/null @@ -1,111 +0,0 @@ -#FIG 3.2 -Portrait -Center -Metric -A4 -100.00 -Single --2 -1200 2 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 2700 1800 229 229 2700 1800 2925 1845 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 2025 2700 229 229 2025 2700 2250 2745 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 3375 2700 229 229 3375 2700 3600 2745 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 6345 1800 229 229 6345 1800 6570 1845 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 5670 2700 229 229 5670 2700 5895 2745 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 7020 2700 229 229 7020 2700 7245 2745 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 8325 1800 229 229 8325 1800 8550 1845 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 7875 2700 229 229 7875 2700 8100 2745 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 8775 2700 229 229 8775 2700 9000 2745 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 6345 2700 229 229 6345 2700 6570 2745 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 5895 3600 229 229 5895 3600 6120 3645 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 6795 3600 229 229 6795 3600 7020 3645 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 2700 2700 229 229 2700 2700 2925 2745 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 2250 3600 229 229 2250 3600 2475 3645 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 3150 3600 229 229 3150 3600 3375 3645 -2 1 0 5 0 7 95 0 -1 12.000 1 0 -1 0 0 2 - 4050 2610 4725 2610 -2 1 0 5 0 7 95 0 -1 12.000 1 0 -1 0 0 2 - 4050 2745 4725 2745 -2 1 0 5 0 7 95 0 -1 12.000 1 1 -1 0 0 3 - 4500 2385 4950 2655 4500 2970 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2490 1905 2025 2467 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2827 2002 3202 2542 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 2115 2475 2535 1965 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 3255 2505 2872 1957 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 6135 1905 5670 2467 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 6472 2002 6847 2542 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 5760 2475 6180 1965 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 6900 2505 6517 1957 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 8160 1957 7860 2460 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 8407 2032 8625 2520 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 7942 2467 8212 2010 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 8685 2475 8467 1987 -2 2 0 1 0 7 80 0 -1 4.000 0 0 -1 0 0 5 - 1575 1350 9225 1350 9225 4050 1575 4050 1575 1350 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 6382 2460 6382 2032 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 6307 2032 6307 2467 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 6180 2857 5880 3360 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 6427 2932 6645 3420 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 5962 3367 6232 2910 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 6705 3375 6487 2887 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 2737 2460 2737 2032 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2662 2032 2662 2467 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2535 2857 2235 3360 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2782 2932 3000 3420 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 2317 3367 2587 2910 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 3060 3375 2842 2887 -4 0 0 80 0 14 12 0.0000 4 105 105 2655 1845 y\001 -4 0 0 80 0 14 12 0.0000 4 105 105 6300 1845 y\001 -4 0 0 80 0 14 12 0.0000 4 75 105 6285 2752 x\001 -4 0 0 80 0 14 12 0.0000 4 75 105 2640 2752 x\001 -4 0 0 80 0 12 12 0.0000 4 105 840 3690 2025 let x' =\001 -4 0 0 80 0 12 12 0.0000 4 150 1890 3690 2205 x # orphaned_clone\001 -4 0 0 80 0 14 12 0.0000 4 105 210 8235 1845 x'\001 diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_delete.fig b/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_delete.fig deleted file mode 100644 index a9fc87eef..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_delete.fig +++ /dev/null @@ -1,96 +0,0 @@ -#FIG 3.2 -Portrait -Center -Metric -A4 -100.00 -Single --2 -1200 2 -6 2550 2092 2865 2407 -2 1 0 4 0 7 80 0 -1 0.000 1 1 -1 0 0 2 - 2595 2362 2820 2137 -2 1 0 4 0 7 80 0 -1 0.000 1 1 -1 0 0 2 - 2595 2137 2820 2362 --6 -6 1980 2430 3420 3870 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 2700 2700 229 229 2700 2700 2925 2745 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 2250 3600 229 229 2250 3600 2475 3645 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 3150 3600 229 229 3150 3600 3375 3645 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2535 2857 2235 3360 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2782 2932 3000 3420 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 2317 3367 2587 2910 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 3060 3375 2842 2887 --6 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 2700 1800 229 229 2700 1800 2925 1845 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 2025 2700 229 229 2025 2700 2250 2745 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 3375 2700 229 229 3375 2700 3600 2745 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 6345 1800 229 229 6345 1800 6570 1845 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 5670 2700 229 229 5670 2700 5895 2745 -1 3 0 1 0 7 95 0 15 4.000 1 0.0000 7020 2700 229 229 7020 2700 7245 2745 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 8325 1800 229 229 8325 1800 8550 1845 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 7875 2700 229 229 7875 2700 8100 2745 -1 3 0 1 0 7 95 0 10 4.000 1 0.0000 8775 2700 229 229 8775 2700 9000 2745 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 2737 2460 2737 2032 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2662 2032 2662 2467 -2 1 0 5 0 7 95 0 -1 12.000 1 0 -1 0 0 2 - 4050 2610 4725 2610 -2 1 0 5 0 7 95 0 -1 12.000 1 0 -1 0 0 2 - 4050 2745 4725 2745 -2 1 0 5 0 7 95 0 -1 12.000 1 1 -1 0 0 3 - 4500 2385 4950 2655 4500 2970 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2490 1905 2025 2467 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2827 2002 3202 2542 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 2115 2475 2535 1965 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 3255 2505 2872 1957 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 6135 1905 5670 2467 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 6472 2002 6847 2542 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 5760 2475 6180 1965 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 6900 2505 6517 1957 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 8160 1957 7860 2460 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 8407 2032 8625 2520 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 7942 2467 8212 2010 -2 1 0 1 0 7 95 0 -1 4.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 8685 2475 8467 1987 -2 2 0 1 0 7 80 0 -1 4.000 0 0 -1 0 0 5 - 1575 1350 9225 1350 9225 4050 1575 4050 1575 1350 -4 0 0 80 0 14 12 0.0000 4 75 105 2640 2752 x\001 -4 0 0 95 0 12 12 0.0000 4 135 1050 3960 2250 x # delete\001 -4 0 0 80 0 14 12 0.0000 4 75 105 8280 1845 x\001 -4 0 0 80 0 14 12 0.0000 4 105 105 2655 1845 y\001 -4 0 0 80 0 14 12 0.0000 4 105 105 6300 1845 y\001 diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_general.fig b/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_general.fig deleted file mode 100644 index 231e76da9..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_general.fig +++ /dev/null @@ -1,35 +0,0 @@ -#FIG 3.2 -Portrait -Center -Metric -A4 -100.00 -Single --2 -1200 2 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 2025 2025 229 229 2025 2025 2250 2070 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 1350 2025 225 225 1350 2025 1575 2025 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 2700 2025 225 225 2700 2025 2925 2025 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 2025 1125 225 225 2025 1125 2250 1125 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 1380 1800 1845 1275 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 1815 1207 1282 1815 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 2055 1792 2055 1350 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 1980 1350 1980 1807 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 1 1.00 60.00 120.00 - 2190 1297 2550 1867 -2 1 0 1 0 7 100 0 15 0.000 0 0 -1 1 0 2 - 1 0 1.00 60.00 120.00 - 2602 1807 2220 1237 -2 2 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 5 - 450 675 3150 675 3150 2475 450 2475 450 675 -4 0 0 100 0 12 10 0.0000 4 120 540 2377 1342 parent\001 -4 0 0 100 0 12 10 0.0000 4 105 810 645 1628 sub_nodes\001 diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_term.fig b/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_term.fig deleted file mode 100644 index 54965fe63..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/pic/node_term.fig +++ /dev/null @@ -1,63 +0,0 @@ -#FIG 3.2 -Portrait -Center -Metric -A4 -100.00 -Single --2 -1200 2 -6 1665 2700 2835 3150 -2 4 0 1 0 7 100 0 15 0.000 0 0 7 0 0 5 - 2835 3150 2835 2700 1665 2700 1665 3150 2835 3150 -4 0 0 80 0 18 12 0.0000 4 135 930 1815 3015 "Cherries"\001 --6 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 2250 1125 225 225 2250 1125 2475 1125 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 1575 2025 225 225 1575 2025 1800 2025 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 2925 2025 225 225 2925 2025 3150 2025 -1 3 0 1 0 7 100 0 15 0.000 1 0.0000 900 2925 242 242 900 2925 1125 3015 -2 4 0 1 0 7 100 0 15 0.000 0 0 7 0 0 5 - 1485 4275 1485 3825 315 3825 315 4275 1485 4275 -2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 2 - 2085 1275 1582 1807 -2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 2 - 2407 1297 2940 1800 -2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 2 - 1417 2190 900 2692 -2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 2 - 1740 2190 2257 2700 -2 1 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 2 - 892 3180 892 3825 -2 2 0 1 0 7 100 0 -1 0.000 0 0 -1 0 0 5 - 45 675 6525 675 6525 4950 45 4950 45 675 -3 3 0 1 0 7 100 0 -1 0.000 0 0 0 22 - 2115 3645 2250 3600 2520 3555 2745 3510 2925 3555 3150 3690 - 3375 3735 3600 3735 3825 3735 4140 3825 4140 4005 4005 4185 - 3735 4230 3420 4185 3150 4230 2835 4275 2520 4230 2340 4140 - 2115 4095 1980 4005 1980 3825 2025 3735 - -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 - -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 - -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -3 3 0 1 0 7 100 0 -1 0.000 0 0 0 17 - 3465 1170 3645 1080 4050 1035 4320 1035 4545 1080 4770 1170 - 5130 1215 5355 1350 5400 1530 5265 1665 4860 1710 4455 1710 - 4095 1665 3780 1620 3555 1575 3420 1485 3420 1305 - -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 - -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 -1.000 - -1.000 -3 2 0 1 0 7 100 0 -1 0.000 0 0 0 5 - 2475 1215 2655 1350 2970 1440 3240 1395 3420 1260 - 0.000 -1.000 -1.000 -1.000 0.000 -3 2 0 1 0 7 100 0 -1 0.000 0 0 0 5 - 1125 3060 1215 3397 1410 3607 1687 3727 2025 3720 - 0.000 -1.000 -1.000 -1.000 0.000 -4 0 0 80 0 18 12 0.0000 4 180 1065 375 4125 "An orange"\001 -4 0 0 80 0 18 12 0.0000 4 90 315 750 2985 \001 -4 0 0 80 0 18 12 0.0000 4 135 315 1410 2085 \001 -4 0 0 80 0 18 12 0.0000 4 90 315 2790 2070 \001 -4 0 0 80 0 18 12 0.0000 4 90 315 2100 1200 \001 -4 0 0 100 0 16 12 0.0000 4 135 795 3600 1260 attributes:\001 -4 0 0 100 0 16 12 0.0000 4 180 1680 3600 1485 "att" -> Value "apple"\001 -4 0 0 100 0 16 12 0.0000 4 135 795 2250 3780 attributes:\001 -4 0 0 100 0 17 12 0.0000 4 180 5910 390 4725 An orangeCherries\001 -4 0 0 100 0 16 12 0.0000 4 180 1800 2250 4005 "att" -> Value "orange"\001 diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/readme.ent b/helm/DEVEL/pxp/pxp/doc/manual/src/readme.ent deleted file mode 100644 index e9fdfc35a..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/readme.ent +++ /dev/null @@ -1,364 +0,0 @@ - - - - - - - - - - - - - - - diff --git a/helm/DEVEL/pxp/pxp/doc/manual/src/yacc.mli.ent b/helm/DEVEL/pxp/pxp/doc/manual/src/yacc.mli.ent deleted file mode 100644 index 604918bd8..000000000 --- a/helm/DEVEL/pxp/pxp/doc/manual/src/yacc.mli.ent +++ /dev/null @@ -1,376 +0,0 @@ - diff --git a/helm/DEVEL/pxp/pxp/examples/Makefile b/helm/DEVEL/pxp/pxp/examples/Makefile deleted file mode 100644 index 934385757..000000000 --- a/helm/DEVEL/pxp/pxp/examples/Makefile +++ /dev/null @@ -1,22 +0,0 @@ -.PHONY: all -all: - -.PHONY: clean -clean: - -.PHONY: CLEAN -CLEAN: clean - $(MAKE) -C xmlforms CLEAN - $(MAKE) -C validate CLEAN - $(MAKE) -C readme CLEAN - $(MAKE) -C simple_transformation CLEAN - -.PHONY: distclean -distclean: clean - rm -f *~ - $(MAKE) -C xmlforms distclean - $(MAKE) -C validate distclean - $(MAKE) -C readme distclean - $(MAKE) -C simple_transformation distclean - - diff --git a/helm/DEVEL/pxp/pxp/examples/readme/.cvsignore b/helm/DEVEL/pxp/pxp/examples/readme/.cvsignore deleted file mode 100644 index 2395c1946..000000000 --- a/helm/DEVEL/pxp/pxp/examples/readme/.cvsignore +++ /dev/null @@ -1,10 +0,0 @@ -*.cmi -*.cmo -*.cma -*.cmx -*.o -*.a -*.cmxa -depend -depend.pkg - diff --git a/helm/DEVEL/pxp/pxp/examples/readme/Makefile b/helm/DEVEL/pxp/pxp/examples/readme/Makefile deleted file mode 100644 index df5f6ed0d..000000000 --- a/helm/DEVEL/pxp/pxp/examples/readme/Makefile +++ /dev/null @@ -1,34 +0,0 @@ -# make readme: make bytecode executable -# make readme.opt: make native executable -# make clean: remove intermediate files -# make CLEAN: remove intermediate files (recursively) -# make distclean: remove any superflous files -# make install -#---------------------------------------------------------------------- - -BIN = /usr/local/bin - -.PHONY: readme -readme: - $(MAKE) -f Makefile.code readme - -.PHONY: readme.opt -readme.opt: - $(MAKE) -f Makefile.code readme.opt - - -.PHONY: clean -clean: - rm -f *.cmi *.cmo *.cma *.cmx *.o *.a *.cmxa - -.PHONY: CLEAN -CLEAN: clean - -.PHONY: distclean -distclean: clean - rm -f *~ depend depend.pkg - rm -f readme readme.opt - -.PHONY: install -install: - cp readme $(BIN) diff --git a/helm/DEVEL/pxp/pxp/examples/readme/Makefile.code b/helm/DEVEL/pxp/pxp/examples/readme/Makefile.code deleted file mode 100644 index 0514ddf33..000000000 --- a/helm/DEVEL/pxp/pxp/examples/readme/Makefile.code +++ /dev/null @@ -1,57 +0,0 @@ -#---------------------------------------------------------------------- -# specific rules for this package: - -OBJECTS = to_html.cmo to_text.cmo -XOBJECTS = $(OBJECTS:.cmo=.cmx) -ARCHIVE = readme.cma -XARCHIVE = readme.cmxa -NAME = readme -REQUIRES = str pxp - -readme: $(ARCHIVE) main.cmo - ocamlfind ocamlc -o readme -custom -package "$(REQUIRES)" \ - -linkpkg $(ARCHIVE) main.cmo - -readme.opt: $(XARCHIVE) main.cmx - ocamlfind ocamlopt -o readme.opt -custom -package "$(REQUIRES)" \ - -linkpkg $(XARCHIVE) main.cmx - -$(ARCHIVE): $(OBJECTS) - $(OCAMLC) -a -o $(ARCHIVE) $(OBJECTS) - -$(XARCHIVE): $(XOBJECTS) - $(OCAMLOPT) -a -o $(XARCHIVE) $(XOBJECTS) - -#---------------------------------------------------------------------- -# general rules: - -OPTIONS = -OCAMLC = ocamlc -g $(OPTIONS) $(ROPTIONS) -OCAMLOPT = ocamlopt -p $(OPTIONS) $(ROPTIONS) -OCAMLDEP = ocamldep $(OPTIONS) -OCAMLFIND = ocamlfind - -depend: *.ml *.mli - $(OCAMLDEP) *.ml *.mli >depend - -depend.pkg: Makefile - $(OCAMLFIND) use -p ROPTIONS= $(REQUIRES) >depend.pkg - -.SUFFIXES: .cmo .cmi .cmx .ml .mli .mll .mly - -.ml.cmx: - $(OCAMLOPT) -c $< - -.ml.cmo: - $(OCAMLC) -c $< - -.mli.cmi: - $(OCAMLC) -c $< - -.mll.ml: - ocamllex $< - -*.mli: - -include depend -include depend.pkg diff --git a/helm/DEVEL/pxp/pxp/examples/readme/main.ml b/helm/DEVEL/pxp/pxp/examples/readme/main.ml deleted file mode 100644 index 4e3837aa9..000000000 --- a/helm/DEVEL/pxp/pxp/examples/readme/main.ml +++ /dev/null @@ -1,108 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -open Pxp_types -open Pxp_document -open Pxp_yacc - - -let rec print_error e = - prerr_endline(string_of_exn e) -;; - - -let run f a = - try f a with - e -> print_error e -;; - - -let convert_to_html filename = - (* read in style definition *) - let document = - parse_document_entity - { default_config with encoding = `Enc_iso88591 } - (from_file filename) - To_html.tag_map - in - let root = document # root in - let store = new To_html.store in - root # extension # to_html store stdout -;; - - -let convert_to_text filename = - (* read in style definition *) - let document = - parse_document_entity - default_config - (from_file filename) - To_text.tag_map - in - let root = document # root in - let store = new To_text.store in - let box = new To_text.box 79 79 in - root # extension # to_box store box; - box # output 0 0 stdout -;; - - -let main() = - let want_html = ref false in - let want_text = ref false in - let filename = ref None in - Arg.parse - [ "-html", Arg.Set want_html, - " convert file to html"; - "-text", Arg.Set want_text, - " convert file to text"; - ] - (fun s -> - match !filename with - None -> filename := Some s - | Some _ -> - raise (Arg.Bad "Multiple arguments not allowed.")) - "usage: readme [ -text | -html ] input.xml >output"; - let fn = - match !filename with - None -> - prerr_endline "readme: no input"; - exit 1 - | Some s -> s - in - match !want_html, !want_text with - true, false -> - run convert_to_html fn - | false, true -> - run convert_to_text fn - | _ -> - prerr_endline ("readme: Please select exactly one output format") -;; - -main();; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:31 lpadovan - * Initial revision - * - * Revision 1.5 2000/07/08 17:58:17 gerd - * Updated because of PXP API changes. - * - * Revision 1.4 2000/06/04 20:25:38 gerd - * Updates because of renamed PXP modules. - * - * Revision 1.3 2000/05/01 16:46:40 gerd - * Using the new error formatter. - * - * Revision 1.2 1999/08/23 16:54:19 gerd - * Minor changes. - * - * Revision 1.1 1999/08/22 22:29:32 gerd - * Initial revision. - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/readme/readme.dtd b/helm/DEVEL/pxp/pxp/examples/readme/readme.dtd deleted file mode 100644 index 8ff6a9f75..000000000 --- a/helm/DEVEL/pxp/pxp/examples/readme/readme.dtd +++ /dev/null @@ -1,38 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/helm/DEVEL/pxp/pxp/examples/readme/to_html.ml b/helm/DEVEL/pxp/pxp/examples/readme/to_html.ml deleted file mode 100644 index f717b2259..000000000 --- a/helm/DEVEL/pxp/pxp/examples/readme/to_html.ml +++ /dev/null @@ -1,432 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - - -(*$ readme.code.header *) -open Pxp_types -open Pxp_document -(*$-*) - - -(*$ readme.code.footnote-printer *) -class type footnote_printer = - object - method footnote_to_html : store_type -> out_channel -> unit - end - -and store_type = - object - method alloc_footnote : footnote_printer -> int - method print_footnotes : out_channel -> unit - end -;; -(*$-*) - - -(*$ readme.code.store *) -class store = - object (self) - - val mutable footnotes = ( [] : (int * footnote_printer) list ) - val mutable next_footnote_number = 1 - - method alloc_footnote n = - let number = next_footnote_number in - next_footnote_number <- number+1; - footnotes <- footnotes @ [ number, n ]; - number - - method print_footnotes ch = - if footnotes <> [] then begin - output_string ch "
\n"; - output_string ch "
\n"; - List.iter - (fun (_,n) -> - n # footnote_to_html (self : #store_type :> store_type) ch) - footnotes; - output_string ch "
\n"; - end - - end -;; -(*$-*) - - - -(*$ readme.code.escape-html *) -let escape_html s = - Str.global_substitute - (Str.regexp "<\\|>\\|&\\|\"") - (fun s -> - match Str.matched_string s with - "<" -> "<" - | ">" -> ">" - | "&" -> "&" - | "\"" -> """ - | _ -> assert false) - s -;; -(*$-*) - - -(*$ readme.code.shared *) -class virtual shared = - object (self) - - (* --- default_ext --- *) - - val mutable node = (None : shared node option) - - method clone = {< >} - method node = - match node with - None -> - assert false - | Some n -> n - method set_node n = - node <- Some n - - (* --- virtual --- *) - - method virtual to_html : store -> out_channel -> unit - - end -;; -(*$-*) - - -(*$ readme.code.only-data *) -class only_data = - object (self) - inherit shared - - method to_html store ch = - output_string ch (escape_html (self # node # data)) - end -;; -(*$-*) - - -(*$ readme.code.no-markup *) -class no_markup = - object (self) - inherit shared - - method to_html store ch = - List.iter - (fun n -> n # extension # to_html store ch) - (self # node # sub_nodes) - end -;; -(*$-*) - - -(*$ readme.code.readme *) -class readme = - object (self) - inherit shared - - method to_html store ch = - (* output header *) - output_string - ch ""; - output_string - ch "\n"; - let title = - match self # node # attribute "title" with - Value s -> s - | _ -> assert false - in - let html_header, _ = - try (self # node # dtd # par_entity "readme:html:header") - # replacement_text - with WF_error _ -> "", false in - let html_trailer, _ = - try (self # node # dtd # par_entity "readme:html:trailer") - # replacement_text - with WF_error _ -> "", false in - let html_bgcolor, _ = - try (self # node # dtd # par_entity "readme:html:bgcolor") - # replacement_text - with WF_error _ -> "white", false in - let html_textcolor, _ = - try (self # node # dtd # par_entity "readme:html:textcolor") - # replacement_text - with WF_error _ -> "", false in - let html_alinkcolor, _ = - try (self # node # dtd # par_entity "readme:html:alinkcolor") - # replacement_text - with WF_error _ -> "", false in - let html_vlinkcolor, _ = - try (self # node # dtd # par_entity "readme:html:vlinkcolor") - # replacement_text - with WF_error _ -> "", false in - let html_linkcolor, _ = - try (self # node # dtd # par_entity "readme:html:linkcolor") - # replacement_text - with WF_error _ -> "", false in - let html_background, _ = - try (self # node # dtd # par_entity "readme:html:background") - # replacement_text - with WF_error _ -> "", false in - - output_string ch "
\n"; - output_string ch (escape_html title); - output_string ch "
\n"; - output_string ch " - if value <> "" then - output_string ch (name ^ "=\"" ^ escape_html value ^ "\" ")) - [ "bgcolor", html_bgcolor; - "text", html_textcolor; - "link", html_linkcolor; - "alink", html_alinkcolor; - "vlink", html_vlinkcolor; - ]; - output_string ch ">\n"; - output_string ch html_header; - output_string ch "

"; - output_string ch (escape_html title); - output_string ch "

\n"; - (* process main content: *) - List.iter - (fun n -> n # extension # to_html store ch) - (self # node # sub_nodes); - (* now process footnotes *) - store # print_footnotes ch; - (* trailer *) - output_string ch html_trailer; - output_string ch "\n"; - - end -;; -(*$-*) - - -(*$ readme.code.section *) -class section the_tag = - object (self) - inherit shared - - val tag = the_tag - - method to_html store ch = - let sub_nodes = self # node # sub_nodes in - match sub_nodes with - title_node :: rest -> - output_string ch ("<" ^ tag ^ ">\n"); - title_node # extension # to_html store ch; - output_string ch ("\n"); - List.iter - (fun n -> n # extension # to_html store ch) - rest - | _ -> - assert false - end -;; - -class sect1 = section "h1";; -class sect2 = section "h3";; -class sect3 = section "h4";; -(*$-*) - - -(*$ readme.code.map-tag *) -class map_tag the_target_tag = - object (self) - inherit shared - - val target_tag = the_target_tag - - method to_html store ch = - output_string ch ("<" ^ target_tag ^ ">\n"); - List.iter - (fun n -> n # extension # to_html store ch) - (self # node # sub_nodes); - output_string ch ("\n"); - end -;; - -class p = map_tag "p";; -class em = map_tag "b";; -class ul = map_tag "ul";; -class li = map_tag "li";; -(*$-*) - - -(*$ readme.code.br *) -class br = - object (self) - inherit shared - - method to_html store ch = - output_string ch "
\n"; - List.iter - (fun n -> n # extension # to_html store ch) - (self # node # sub_nodes); - end -;; -(*$-*) - - -(*$ readme.code.code *) -class code = - object (self) - inherit shared - - method to_html store ch = - let data = self # node # data in - (* convert tabs *) - let l = String.length data in - let rec preprocess i column = - (* this is very ineffective but comprehensive: *) - if i < l then - match data.[i] with - '\t' -> - let n = 8 - (column mod 8) in - String.make n ' ' ^ preprocess (i+1) (column + n) - | '\n' -> - "\n" ^ preprocess (i+1) 0 - | c -> - String.make 1 c ^ preprocess (i+1) (column + 1) - else - "" - in - output_string ch "

";
-      output_string ch (escape_html (preprocess 0 0));
-      output_string ch "

"; - - end -;; -(*$-*) - - -(*$ readme.code.a *) -class a = - object (self) - inherit shared - - method to_html store ch = - output_string ch " escape_html v - | Valuelist _ -> assert false - | Implied_value -> - begin match self # node # attribute "readmeref" with - Value v -> escape_html v ^ ".html" - | Valuelist _ -> assert false - | Implied_value -> - "" - end - in - if href <> "" then - output_string ch ("href=\"" ^ href ^ "\""); - output_string ch ">"; - output_string ch (escape_html (self # node # data)); - output_string ch ""; - - end -;; -(*$-*) - - -(*$ readme.code.footnote *) -class footnote = - object (self) - inherit shared - - val mutable footnote_number = 0 - - method to_html store ch = - let number = - store # alloc_footnote (self : #shared :> footnote_printer) in - let foot_anchor = - "footnote" ^ string_of_int number in - let text_anchor = - "textnote" ^ string_of_int number in - footnote_number <- number; - output_string ch ( "[" ^ string_of_int number ^ - "]" ) - - method footnote_to_html store ch = - (* prerequisite: we are in a definition list
...
*) - let foot_anchor = - "footnote" ^ string_of_int footnote_number in - let text_anchor = - "textnote" ^ string_of_int footnote_number in - output_string ch ("
[" ^ string_of_int footnote_number ^ - "]
\n
"); - List.iter - (fun n -> n # extension # to_html store ch) - (self # node # sub_nodes); - output_string ch ("\n
") - - end -;; -(*$-*) - - -(**********************************************************************) - -(*$ readme.code.tag-map *) -open Pxp_yacc - -let tag_map = - make_spec_from_alist - ~data_exemplar:(new data_impl (new only_data)) - ~default_element_exemplar:(new element_impl (new no_markup)) - ~element_alist: - [ "readme", (new element_impl (new readme)); - "sect1", (new element_impl (new sect1)); - "sect2", (new element_impl (new sect2)); - "sect3", (new element_impl (new sect3)); - "title", (new element_impl (new no_markup)); - "p", (new element_impl (new p)); - "br", (new element_impl (new br)); - "code", (new element_impl (new code)); - "em", (new element_impl (new em)); - "ul", (new element_impl (new ul)); - "li", (new element_impl (new li)); - "footnote", (new element_impl (new footnote : #shared :> shared)); - "a", (new element_impl (new a)); - ] - () -;; -(*$-*) - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:31 lpadovan - * Initial revision - * - * Revision 1.6 2000/08/22 14:34:25 gerd - * Using make_spec_from_alist instead of make_spec_from_mapping. - * - * Revision 1.5 2000/08/18 21:15:14 gerd - * Update because of PXP API change: par_entity raises WF_error - * instead of Validation error if the entity is not defined. - * Further minor updates. - * - * Revision 1.4 2000/07/08 17:58:17 gerd - * Updated because of PXP API changes. - * - * Revision 1.3 2000/06/04 20:25:38 gerd - * Updates because of renamed PXP modules. - * - * Revision 1.2 1999/09/12 20:09:32 gerd - * Added section marks. - * - * Revision 1.1 1999/08/22 22:29:32 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/readme/to_text.ml b/helm/DEVEL/pxp/pxp/examples/readme/to_text.ml deleted file mode 100644 index fc45f45cd..000000000 --- a/helm/DEVEL/pxp/pxp/examples/readme/to_text.ml +++ /dev/null @@ -1,599 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -open Pxp_types -open Pxp_document - - -(**********************************************************************) -(* The box class represents formatted text *) -(**********************************************************************) - -class type formatted_text = - object - method output : int -> int -> out_channel -> unit - (* output initial_indent indent ch: - * 'initial_indent' is how far the first line should be indented; - * 'indent' how far the rest. 'ch' is the channel on which the lines - * are to be printed. - *) - - method multiline : bool - (* whether the box occupies multiple lines *) - - method width_of_last_line : int - (* returns the width of the last line *) - end -;; - - -type text = - Text of string - | Box of formatted_text -;; - - -let textwidth tl = - let rec compute tl r = - match tl with - [] -> r - | t :: tl' -> - begin match t with - Text s -> - compute tl' (r + String.length s) - | Box b -> - if b # multiline then - compute tl' (b # width_of_last_line) - else - compute tl' (r + b # width_of_last_line) - end - in - compute (List.rev tl) 0 -;; - - -class box the_initial_width the_width = - object (self) - - (* The 'initial_width' is the width that is available on the first - * line of output; the 'width' is the width that is available in the - * rest. - *) - - val initial_width = the_initial_width - val width = the_width - - (* state: *) - - val mutable space_added = false - val mutable linefeed_added = false - val mutable is_first_line = true - val mutable lines = [] - (* lines in reverse order (first line = last element) *) - val mutable current_line = [] - (* not member of 'lines'; again reverse order *) - val mutable current_indent = 0 - - method add_space = - if not space_added then begin - space_added <- true; - linefeed_added <- true; - current_line <- Text " " :: current_line - end - - method ignore_space = - space_added <- true; - linefeed_added <- true - - method add_linefeed = - if not linefeed_added then begin - linefeed_added <- true; - if not space_added then - current_line <- Text " " :: current_line - end - - method ignore_linefeed = - linefeed_added <- true - - method add_newline = - lines <- current_line :: lines; - current_line <- []; - space_added <- true; - linefeed_added <- true; - is_first_line <- false; - current_indent <- 0; - - method add_word s = - (* first try to add 's' to 'current_line' *) - let current_line' = Text s :: current_line in - let current_width = - if is_first_line then initial_width else width in - if textwidth current_line' + current_indent <= current_width then begin - (* ok, the line does not become too long *) - current_line <- current_line'; - space_added <- false; - linefeed_added <- false - end - else begin - (* The line would be too long. *) - lines <- current_line :: lines; - current_line <- [Text s]; - space_added <- false; - linefeed_added <- false; - is_first_line <- false; - current_indent <- 0; - end - - method add_box b = - current_line <- Box b :: current_line; - space_added <- false; - linefeed_added <- false; - - - method width_of_last_line = - textwidth current_line + current_indent - - - method available_width = - let current_width = - if is_first_line then initial_width else width in - current_width - textwidth current_line - current_indent - - - method multiline = - lines <> [] or - (List.exists - (function - Text _ -> false - | Box b -> b # multiline) - current_line) - - method output initial_indent indent ch = - let eff_lines = - List.rev - (current_line :: lines) in - let rec out_lines cur_indent ll = - match ll with - [] -> () - | l :: ll' -> - output_string ch (String.make cur_indent ' '); - List.iter - (function - Text s -> - output_string ch s - | Box b -> - b # output 0 indent ch - ) - (List.rev l); - if ll' <> [] then - output_string ch "\n"; - out_lines indent ll' - in - out_lines initial_indent eff_lines - end -;; - - -class listitem_box listmark indent totalwidth = - let initial_newline = String.length listmark >= indent in - object (self) - inherit box totalwidth (totalwidth - indent) as super - - val extra_indent = indent - - initializer - self # add_word listmark; - if initial_newline then - self # add_newline - else begin - current_line <- Text (String.make (indent - String.length listmark) ' ') - :: current_line; - space_added <- true; - linefeed_added <- true; - end - - - method output initial_indent indent ch = - super # output initial_indent (indent + extra_indent) ch - end -;; - - -(**********************************************************************) -(* Footnotes etc. *) -(**********************************************************************) - - -class type footnote_printer = - object - method footnote_to_box : store_type -> box -> unit - end - -and store_type = - object - method alloc_footnote : footnote_printer -> int - method print_footnotes : box -> unit - end -;; - - -class store = - object (self) - - val mutable footnotes = ( [] : (int * footnote_printer) list ) - val mutable next_footnote_number = 1 - - method alloc_footnote n = - let number = next_footnote_number in - next_footnote_number <- number+1; - footnotes <- footnotes @ [ number, n ]; - number - - method print_footnotes (b : box) = - if footnotes <> [] then begin - b # add_newline; - b # add_newline; - let w = b # available_width in - b # add_word (String.make (w/3) '-'); - b # add_newline; - b # add_newline; - List.iter - (fun (_,n) -> - n # footnote_to_box (self : #store_type :> store_type) b) - footnotes; - b # add_newline; - end - end -;; - - - -(**********************************************************************) -(* The extension objects *) -(**********************************************************************) - - -class virtual shared = - object (self) - - (* --- default_ext --- *) - - val mutable node = (None : shared node option) - - method clone = {< >} - method node = - match node with - None -> - assert false - | Some n -> n - method set_node n = - node <- Some n - - (* --- virtual --- *) - - method virtual to_box : store -> box -> unit - (* to_box store b: - * formats the element using box 'b' - *) - end -;; - - -class only_data = - object (self) - inherit shared - - val white_space_re = Str.regexp "[ \t]+\\|\n" - - method to_box store b = - let s = self # node # data in - let splitted = Str.full_split white_space_re s in - List.iter - (function - Str.Delim "\n" -> - b # add_linefeed - | Str.Delim _ -> - b # add_space - | Str.Text s -> - b # add_word s) - splitted - end -;; - - -class no_markup = - object (self) - inherit shared - - method to_box store b = - List.iter - (fun n -> n # extension # to_box store b) - (self # node # sub_nodes) - end -;; - - -class readme = - object (self) - inherit shared - - method to_box store b = - let title = - match self # node # attribute "title" with - Value s -> s - | _ -> assert false - in - let w = b # available_width in - let line = String.make (w-1) '*' in - b # add_word line; - b # add_newline; - b # add_word title; - b # add_newline; - b # add_word line; - b # add_newline; - b # add_newline; - (* process main content: *) - List.iter - (fun n -> n # extension # to_box store b) - (self # node # sub_nodes); - (* now process footnotes *) - store # print_footnotes b; - (* trailer *) - b # add_newline; - end -;; - - -class section the_tag = - object (self) - inherit shared - - val tag = the_tag - - method to_box store b = - let sub_nodes = self # node # sub_nodes in - match sub_nodes with - title_node :: rest -> - b # add_newline; - let w = b # available_width in - let line = String.make (w-1) tag in - b # add_word line; - b # add_newline; - b # add_word (title_node # data); - b # add_newline; - b # add_word line; - b # add_newline; - List.iter - (fun n -> - n # extension # to_box store b) - rest; - | _ -> - assert false - end -;; - -class sect1 = section '=';; -class sect2 = section '-';; -class sect3 = section ':';; - - -class p = - object (self) - inherit shared - - method to_box store b = - let within_list = - match self # node # parent # node_type with - T_element "li" -> true - | T_element _ -> false - | _ -> assert false - in - if not within_list then - b # add_newline; - let w = b # available_width in - let b' = new box w w in - b' # ignore_space; - List.iter - (fun n -> n # extension # to_box store b') - (self # node # sub_nodes); - b # add_box (b' :> formatted_text); - b # add_newline; - end -;; - - -class li = - object (self) - inherit shared - - method to_box store b = - b # add_newline; - let w = b # available_width in - let b' = new listitem_box "-" 3 w in - b' # ignore_space; - List.iter - (fun n -> n # extension # to_box store b') - (self # node # sub_nodes); - b # add_box (b' :> formatted_text); - end -;; - - -class code = - object (self) - inherit shared - - method to_box store b = - b # add_newline; - let w = b # available_width in - let b' = new box w w in - b' # ignore_space; - let data = self # node # data in - (* convert tabs *) - let l = String.length data in - let rec add s i column = - (* this is very ineffective but comprehensive: *) - if i < l then - match data.[i] with - '\t' -> - let n = 8 - (column mod 8) in - add (s ^ String.make n ' ') (i+1) (column + n) - | '\n' -> - b' # add_word s; - b' # add_newline; - add "" (i+1) 0 - | c -> - add (s ^ String.make 1 c) (i+1) (column + 1) - else - if s <> "" then begin - b' # add_word s; - b' # add_newline; - end - in - add "" 0 0; - b # add_box (b' :> formatted_text); - b # add_newline; - end -;; - - -class br = - object (self) - inherit shared - - method to_box store b = - b # add_newline; - end -;; - - -class footnote = - object (self) - inherit shared - - val mutable footnote_number = 0 - - method to_box store b = - let number = - store # alloc_footnote (self : #shared :> footnote_printer) in - footnote_number <- number; - b # add_space; - b # add_word ("[" ^ string_of_int number ^ "]"); - - method footnote_to_box store b = - let w = b # available_width in - let n = "[" ^ string_of_int footnote_number ^ "]" in - let b' = new listitem_box n 6 w in - b' # ignore_space; - List.iter - (fun n -> n # extension # to_box store b') - (self # node # sub_nodes); - b # add_box (b' :> formatted_text); - b # add_newline; - b # add_newline; - - end -;; - - -class a = - object (self) - inherit shared - - val mutable footnote_number = 0 - val mutable a_href = "" - - method to_box store b = - let href = - match self # node # attribute "href" with - Value v -> "see " ^ v - | Valuelist _ -> assert false - | Implied_value -> - begin match self # node # attribute "readmeref" with - Value v -> "see file " ^ v - | Valuelist _ -> assert false - | Implied_value -> - "" - end - in - a_href <- href; - List.iter - (fun n -> n # extension # to_box store b) - (self # node # sub_nodes); - if href <> "" then begin - let number = - store # alloc_footnote (self : #shared :> footnote_printer) in - footnote_number <- number; - b # add_space; - b # add_word ("[" ^ string_of_int number ^ "]"); - end - - method footnote_to_box store b = - if a_href <> "" then begin - let w = b # available_width in - let n = "[" ^ string_of_int footnote_number ^ "]" in - let b' = new listitem_box n 6 w in - b' # ignore_space; - b' # add_word a_href; - b # add_box (b' :> formatted_text); - b # add_newline; - b # add_newline; - end - end -;; - -(**********************************************************************) - -open Pxp_yacc - -let tag_map = - make_spec_from_alist - ~data_exemplar:(new data_impl (new only_data)) - ~default_element_exemplar:(new element_impl (new no_markup)) - ~element_alist: - [ "readme", (new element_impl (new readme)); - "sect1", (new element_impl (new sect1)); - "sect2", (new element_impl (new sect2)); - "sect3", (new element_impl (new sect3)); - "title", (new element_impl (new no_markup)); - "p", (new element_impl (new p)); - "br", (new element_impl (new br)); - "code", (new element_impl (new code)); - "em", (new element_impl (new no_markup)); - "ul", (new element_impl (new no_markup)); - "li", (new element_impl (new li)); - "footnote", (new element_impl (new footnote : #shared :> shared)); - "a", (new element_impl (new a : #shared :> shared)); - ] - () -;; - - - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:31 lpadovan - * Initial revision - * - * Revision 1.5 2000/08/22 14:34:25 gerd - * Using make_spec_from_alist instead of make_spec_from_mapping. - * - * Revision 1.4 2000/08/18 21:15:25 gerd - * Minor updates because of PXP API changes. - * - * Revision 1.3 2000/07/08 17:58:17 gerd - * Updated because of PXP API changes. - * - * Revision 1.2 2000/06/04 20:25:38 gerd - * Updates because of renamed PXP modules. - * - * Revision 1.1 1999/08/22 22:29:32 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/simple_transformation/Makefile b/helm/DEVEL/pxp/pxp/examples/simple_transformation/Makefile deleted file mode 100644 index 27be18c30..000000000 --- a/helm/DEVEL/pxp/pxp/examples/simple_transformation/Makefile +++ /dev/null @@ -1,21 +0,0 @@ -all: print sort delcol - -print: print.ml - ocamlfind ocamlc -o print -package pxp -linkpkg -custom \ - -predicates pxp_without_utf8 print.ml - -sort: sort.ml - ocamlfind ocamlc -o sort -package pxp -linkpkg -custom \ - -predicates pxp_without_utf8 sort.ml - -delcol: delcol.ml - ocamlfind ocamlc -o delcol -package pxp -linkpkg -custom \ - -predicates pxp_without_utf8 delcol.ml - -clean: - rm -f *.cmo *.cma *.cmi *.cmxa *.a *.o - -distclean: clean - rm -f *~ print sort delcol - -CLEAN: clean diff --git a/helm/DEVEL/pxp/pxp/examples/simple_transformation/README b/helm/DEVEL/pxp/pxp/examples/simple_transformation/README deleted file mode 100644 index 5b9212862..000000000 --- a/helm/DEVEL/pxp/pxp/examples/simple_transformation/README +++ /dev/null @@ -1,17 +0,0 @@ -Usage: - sort -by phone - match n # node_type with - T_element name when name = col -> - raise Skip - | _ -> n # orphaned_flat_clone) - tree -;; - - -let main() = - let column = ref "" in - Arg.parse - [ "-col", Arg.String (fun s -> column := s), - " (last-name|first-name|phone)"; - ] - (fun _ -> raise (Arg.Bad "Bad usage")) - "usage: sort [ options ]"; - if !column = "" then ( - prerr_endline "Column not specified!"; - exit 1; - ); - if not(List.mem !column ["last-name"; "first-name"; "phone"]) then ( - prerr_endline ("Unknown column: " ^ !column); - exit 1 - ); - try - let dtd = parse_dtd_entity default_config (from_file "record.dtd") in - let tree = - parse_content_entity default_config (from_channel stdin) dtd default_spec - in - print_endline ""; - (delcol !column tree) # write (Out_channel stdout) `Enc_iso88591 - with - x -> - prerr_endline(string_of_exn x); - exit 1 -;; - - -main();; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:32 lpadovan - * Initial revision - * - * Revision 1.2 2000/08/24 09:42:52 gerd - * Updated a comment. - * - * Revision 1.1 2000/08/24 09:39:59 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/simple_transformation/print.ml b/helm/DEVEL/pxp/pxp/examples/simple_transformation/print.ml deleted file mode 100644 index 56f5fb69b..000000000 --- a/helm/DEVEL/pxp/pxp/examples/simple_transformation/print.ml +++ /dev/null @@ -1,60 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -(* Read a record-list structure and print it *) -open Pxp_types;; -open Pxp_document;; -open Pxp_yacc;; - -let print tree = - iter_tree - ~pre: - (fun n -> - match n # node_type with - T_element "last-name" -> - print_endline ("Last name: " ^ n # data) - | T_element "first-name" -> - print_endline ("First name: " ^ n # data) - | T_element "phone" -> - print_endline ("Telephone number: " ^ n # data) - | _ -> - ()) - ~post: - (fun n -> - match n # node_type with - T_element "record" -> - print_newline() - | _ -> - ()) - tree -;; - -let main() = - try - let dtd = parse_dtd_entity default_config (from_file "record.dtd") in - let tree = - parse_content_entity default_config (from_channel stdin) dtd default_spec in - print tree - with - x -> - prerr_endline(string_of_exn x); - exit 1 -;; - - -main();; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:32 lpadovan - * Initial revision - * - * Revision 1.1 2000/08/22 21:57:43 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/simple_transformation/record.dtd b/helm/DEVEL/pxp/pxp/examples/simple_transformation/record.dtd deleted file mode 100644 index b054ccd29..000000000 --- a/helm/DEVEL/pxp/pxp/examples/simple_transformation/record.dtd +++ /dev/null @@ -1,5 +0,0 @@ - - - - - diff --git a/helm/DEVEL/pxp/pxp/examples/simple_transformation/sample.xml b/helm/DEVEL/pxp/pxp/examples/simple_transformation/sample.xml deleted file mode 100644 index 00d36b09b..000000000 --- a/helm/DEVEL/pxp/pxp/examples/simple_transformation/sample.xml +++ /dev/null @@ -1,18 +0,0 @@ - - - - Stolpmann - Gerd - 997705 - - - Smith - Jack - 12345 - - - Ützgür - xxx - 7654 - - diff --git a/helm/DEVEL/pxp/pxp/examples/simple_transformation/sort.ml b/helm/DEVEL/pxp/pxp/examples/simple_transformation/sort.ml deleted file mode 100644 index 297730f66..000000000 --- a/helm/DEVEL/pxp/pxp/examples/simple_transformation/sort.ml +++ /dev/null @@ -1,83 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -(* Read a record-list, sort it, and print it as XML *) -open Pxp_types;; -open Pxp_document;; -open Pxp_yacc;; - -let sort by tree = - map_tree - ~pre: - (fun n -> n # orphaned_flat_clone) - ~post: - (fun n -> - match n # node_type with - T_element "record-list" -> - let l = n # sub_nodes in - let l' = List.sort - (fun a b -> - let a_string = - try (find_element by a) # data - with Not_found -> "" in - let b_string = - try (find_element by b) # data - with Not_found -> "" in - Pervasives.compare a_string b_string) - l in - n # set_nodes l'; - n - | _ -> - n) - tree -;; - - -let main() = - let criterion = ref "last-name" in - Arg.parse - [ "-by", Arg.String (fun s -> criterion := s), - " (last-name|first-name|phone)"; - ] - (fun _ -> raise (Arg.Bad "Bad usage")) - "usage: sort [ options ]"; - if not(List.mem !criterion ["last-name"; "first-name"; "phone"]) then ( - prerr_endline ("Unknown criterion: " ^ !criterion); - exit 1 - ); - try - let dtd = parse_dtd_entity default_config (from_file "record.dtd") in - let tree = - parse_content_entity default_config (from_channel stdin) dtd default_spec - in - print_endline ""; - (sort !criterion tree) # write (Out_channel stdout) `Enc_iso88591 - with - x -> - prerr_endline(string_of_exn x); - exit 1 -;; - - -main();; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:32 lpadovan - * Initial revision - * - * Revision 1.3 2000/08/30 16:05:44 gerd - * Minor update - * - * Revision 1.2 2000/08/24 09:40:11 gerd - * Allow that columns are missing. - * - * Revision 1.1 2000/08/22 21:57:44 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/validate/.cvsignore b/helm/DEVEL/pxp/pxp/examples/validate/.cvsignore deleted file mode 100644 index e125622dd..000000000 --- a/helm/DEVEL/pxp/pxp/examples/validate/.cvsignore +++ /dev/null @@ -1,13 +0,0 @@ -*.cmi -*.cmo -*.cma -*.cmx -*.o -*.a -*.cmxa -*.new -*.mlf -*.ml0 -depend -depend.pkg - diff --git a/helm/DEVEL/pxp/pxp/examples/validate/Makefile b/helm/DEVEL/pxp/pxp/examples/validate/Makefile deleted file mode 100644 index 64b691887..000000000 --- a/helm/DEVEL/pxp/pxp/examples/validate/Makefile +++ /dev/null @@ -1,28 +0,0 @@ -# make validate: make bytecode executable -# make validate.opt: make native executable -# make clean: remove intermediate files (in this directory) -# make CLEAN: remove intermediate files (recursively) -# make distclean: remove any superflous files (recursively) -#---------------------------------------------------------------------- - -pxpvalidate: validate.ml - ocamlfind ocamlc -o pxpvalidate -package "pxp" -linkpkg validate.ml - -pxpvalidate.opt: validate.ml - ocamlfind ocamlopt -o pxpvalidate.opt -package "pxp" -linkpkg validate.ml - -#---------------------------------------------------------------------- -.PHONY: all -all: - -.PHONY: clean -clean: - rm -f *.cmi *.cmo *.cma *.cmx *.o *.a *.cmxa - -.PHONY: CLEAN -CLEAN: clean - -.PHONY: distclean -distclean: clean - rm -f *~ - rm -f pxpvalidate pxpvalidate.opt diff --git a/helm/DEVEL/pxp/pxp/examples/validate/validate.ml b/helm/DEVEL/pxp/pxp/examples/validate/validate.ml deleted file mode 100644 index 3bb83d2d1..000000000 --- a/helm/DEVEL/pxp/pxp/examples/validate/validate.ml +++ /dev/null @@ -1,126 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - - -open Pxp_document;; -open Pxp_yacc;; -open Pxp_types;; - -let error_happened = ref false;; - -let print_error e = - print_endline (string_of_exn e) -;; - -class warner = - object - method warn w = - print_endline ("WARNING: " ^ w) - end -;; - -let parse debug wf iso88591 filename = - try - (* Parse the document: *) - let parse_fn = - if wf then parse_wfdocument_entity - else - let index = new hash_index in - parse_document_entity - ?transform_dtd:None - ~id_index:(index :> 'ext index) - in - let doc = - parse_fn - { default_config with - debugging_mode = debug; - encoding = if iso88591 then `Enc_iso88591 else `Enc_utf8; - idref_pass = true; - warner = new warner - } - (from_file filename) - default_spec - in - () - with - e -> - (* Print error; remember that there was an error *) - error_happened := true; - print_error e -;; - - -let main() = - let debug = ref false in - let wf = ref false in - let iso88591 = ref false in - let files = ref [] in - Arg.parse - [ "-d", Arg.Set debug, - " turn debugging mode on"; - "-wf", Arg.Set wf, - " check only on well-formedness"; - "-iso-8859-1", Arg.Set iso88591, - " use ISO-8859-1 as internal encoding instead of UTF-8"; - ] - (fun x -> files := x :: !files) - " -usage: pxpvalidate [options] file ... - -- checks the validity of XML documents. See below for list of options. - -PXP - The XML parser for Objective Caml - -List of options:"; - files := List.rev !files; - List.iter (parse !debug !wf !iso88591) !files; -;; - - -main(); -if !error_happened then exit(1);; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:31 lpadovan - * Initial revision - * - * Revision 1.10 2000/08/30 15:58:41 gerd - * Updated. - * - * Revision 1.9 2000/07/14 14:57:30 gerd - * Updated: warner - * - * Revision 1.8 2000/07/14 14:13:15 gerd - * Cosmetic changes. - * - * Revision 1.7 2000/07/14 14:11:06 gerd - * Updated because of changes of the PXP API. - * - * Revision 1.6 2000/07/08 21:53:00 gerd - * Updated because of PXP interface changes. - * - * Revision 1.5 2000/06/04 20:21:55 gerd - * Updated to new module names. - * - * Revision 1.4 2000/05/01 16:44:57 gerd - * Added check for ID uniqueness. - * Using new error formatter. - * - * Revision 1.3 1999/11/09 22:27:30 gerd - * The programs returns now an exit code of 1 if one of the - * XML files produces an error. - * - * Revision 1.2 1999/09/01 23:09:56 gerd - * Added the option -wf that switches to well-formedness checking - * instead of validation. - * - * Revision 1.1 1999/08/14 22:20:53 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/.cvsignore b/helm/DEVEL/pxp/pxp/examples/xmlforms/.cvsignore deleted file mode 100644 index e125622dd..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/.cvsignore +++ /dev/null @@ -1,13 +0,0 @@ -*.cmi -*.cmo -*.cma -*.cmx -*.o -*.a -*.cmxa -*.new -*.mlf -*.ml0 -depend -depend.pkg - diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/Makefile b/helm/DEVEL/pxp/pxp/examples/xmlforms/Makefile deleted file mode 100644 index 5a0ba32b3..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/Makefile +++ /dev/null @@ -1,33 +0,0 @@ -# make xmlforms: make bytecode executable -# make xmlforms.opt: make native executable -# make clean: remove intermediate files -# make CLEAN: remove intermediate files (recursively) -# make distclean: remove any superflous files -# make release: cleanup, create archive, tag CVS module -# (for developers) -#---------------------------------------------------------------------- - -.PHONY: xmlforms -xmlforms: - $(MAKE) -f Makefile.code xmlforms - -.PHONY: xmlforms.opt -xmlforms.opt: - $(MAKE) -f Makefile.code xmlforms.opt - - -.PHONY: clean -clean: - rm -f *.cmi *.cmo *.cma *.cmx *.o *.a *.cmxa - -.PHONY: CLEAN -CLEAN: clean - $(MAKE) -C styles CLEAN - -.PHONY: distclean -distclean: clean - rm -f *~ depend depend.pkg - rm -f xmlforms xmlforms.opt - $(MAKE) -C styles distclean - - diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/Makefile.code b/helm/DEVEL/pxp/pxp/examples/xmlforms/Makefile.code deleted file mode 100644 index f99674042..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/Makefile.code +++ /dev/null @@ -1,57 +0,0 @@ -#---------------------------------------------------------------------- -# specific rules for this package: - -OBJECTS = ds_context.cmo ds_style.cmo -XOBJECTS = $(OBJECTS:.cmo=.cmx) -ARCHIVE = xmlforms.cma -XARCHIVE = xmlforms.cmxa -NAME = xmlforms -REQUIRES = camltk str pxp - -xmlforms: $(ARCHIVE) ds_app.cmo - ocamlfind ocamlc -g -o xmlforms -custom -package "$(REQUIRES)" \ - -linkpkg $(ARCHIVE) ds_app.cmo - -xmlform.opt: $(XARCHIVE) ds_app.cmx - ocamlfind ocamlopt -o xmlforms.opt -custom -package "$(REQUIRES)" \ - -linkpkg $(XARCHIVE) ds_app.cmx - -$(ARCHIVE): $(OBJECTS) - $(OCAMLC) -a -o $(ARCHIVE) $(OBJECTS) - -$(XARCHIVE): $(XOBJECTS) - $(OCAMLOPT) -a -o $(XARCHIVE) $(XOBJECTS) - -#---------------------------------------------------------------------- -# general rules: - -OPTIONS = -OCAMLC = ocamlc -g $(OPTIONS) $(ROPTIONS) -OCAMLOPT = ocamlopt -p $(OPTIONS) $(ROPTIONS) -OCAMLDEP = ocamldep $(OPTIONS) -OCAMLFIND = ocamlfind - -depend: *.ml *.mli - $(OCAMLDEP) *.ml *.mli >depend - -depend.pkg: Makefile - $(OCAMLFIND) use -p ROPTIONS= $(REQUIRES) >depend.pkg - -.SUFFIXES: .cmo .cmi .cmx .ml .mli .mll .mly - -.ml.cmx: - $(OCAMLOPT) -c $< - -.ml.cmo: - $(OCAMLC) -c $< - -.mli.cmi: - $(OCAMLC) -c $< - -.mll.ml: - ocamllex $< - -*.mli: - -include depend -include depend.pkg diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/README b/helm/DEVEL/pxp/pxp/examples/xmlforms/README deleted file mode 100644 index 806a4094a..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/README +++ /dev/null @@ -1,61 +0,0 @@ ------------------------------------------------------------------------------ -xmlforms ------------------------------------------------------------------------------ - -THE IDEA: - -This example uses XML for two purposes: - -- The "story" and layout of the application is specified in XML -- The data records are stored in XML - -An "application" is a set of "masks" or sequences of masks, and every mask -is thought as a visible page of the application, containing layout -elements and functional elements. Layout is specified in TeX-style using -hboxes, vboxes, hspaces, vspaces. Functional elements are "entries" (input -box for a string with one line), "textboxes" (input boxes with several -lines), and buttons. - -See styles/ds-style.dtd for the DTD of an application specification, and -the other xml files in this directory for examples. - -The entries and textboxes are bound to "slots", i.e. string variables. If -the application is started, the slots are read from a file, and if the -user presses a special "save" button, the slots are stored into this file. -The format of this data file is again XML; the simplistic DTD can be found -in styles/ds-object.dtd. - - -THE IMPLEMENTATION: - -There is currently a mapping of the specifications to ocamltk, done by a -program called "xmlforms". - - -HOW TO COMPILE: - -It is assumed that "findlib" is present on your system; see ABOUT-FINDLIB -in the toplevel directory. -The "markup" module must have been installed. - -- "make xmlforms" produces a bytecode executable "xmlforms" -- "make xmlforms.opt" produces a native executable "xmlforms.opt" - -Note that you cannot start the executables directly: - - -HOW TO START AN APPLICATION: - -As "xmlforms" is a generic executable, there is a simple mechanism to bind -it to a specific instance of an application. For example, in the "styles" -subdirectory there is the application specification "crazy-style.xml". To -start it, make a symlink called "crazy" referring to the "xmlforms" -binary, set the environment variable DATASHEETS to the directory where the -DTDs and XML files can be found, and start "crazy": - - ln -s ../xmlforms crazy - DATASHEETS=. crazy my-record.xml - -(If you do not set DATASHEETS, a default directory, normally -"/opt/xmlforms/lib" is used.) - diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_app.ml b/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_app.ml deleted file mode 100644 index 55589ea59..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_app.ml +++ /dev/null @@ -1,107 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -open Tk -open Pxp_types -open Pxp_document -open Pxp_yacc -open Ds_context -open Ds_style - - -let installdir = - try Sys.getenv "DATASHEETS" with - Not_found -> "/opt/xmlforms/lib" -let style_sysid = ref "" -let object_dtd_sysid = Filename.concat installdir "ds-object.dtd" -let object_dtd_root = "record" - - -let rec print_error e = - print_endline (string_of_exn e) -;; - - -let run f arg1 arg2 = - try f arg1 arg2 with - e -> print_error e -;; - - -let edit filename cmd = - (* read in style definition *) - let index = new hash_index in - let style = - parse_document_entity - ~id_index:(index :> 'ext index) - default_config - (from_file !style_sysid) - tag_map - in - let root = style # root in - root # extension # prepare (index :> 'ext index); - - let obj_dtd = - parse_dtd_entity - default_config - (from_file object_dtd_sysid) - in - obj_dtd # set_root object_dtd_root; - - let topframe = openTk() in - let context = new context filename obj_dtd index root topframe in - - Toplevel.configure topframe [ Width (Centimeters 20.0); - Height (Centimeters 12.0); - ]; - Pack.propagate_set topframe false; - Wm.title_set topframe cmd; - context # goto (root # extension # start_node_name); - mainLoop() -;; - - -let main() = - let cmd = Filename.basename Sys.argv.(0) in - match Sys.argv with - [| _; filename |] -> - style_sysid := Filename.concat installdir (cmd ^ "-style.xml"); - run edit filename cmd - | _ -> - prerr_endline ("usage: " ^ cmd ^ " filename"); - exit(1) -;; - -main();; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:32 lpadovan - * Initial revision - * - * Revision 1.6 2000/07/16 19:36:03 gerd - * Updated. - * - * Revision 1.5 2000/07/08 22:03:11 gerd - * Updates because of PXP interface changes. - * - * Revision 1.4 2000/06/04 20:29:19 gerd - * Updates because of renamed PXP modules. - * - * Revision 1.3 2000/05/01 16:48:45 gerd - * Using the new error formatter. - * - * Revision 1.2 1999/12/17 21:34:29 gerd - * The name of the root element is set to "record" in the - * object_dtd; otherwise the parser would not check that the root - * element is the right element. - * - * Revision 1.1 1999/08/21 19:11:05 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_context.ml b/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_context.ml deleted file mode 100644 index 453ca00f0..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_context.ml +++ /dev/null @@ -1,238 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -open Pxp_types -open Pxp_document -open Pxp_yacc - -let empty_record = new element_impl (Pxp_yacc.default_extension);; -let empty_dnode = new data_impl Pxp_yacc.default_extension;; - -class context the_filename the_obj_dtd the_index the_root the_topframe = - object (self) - val filename = the_filename - val obj_dtd = the_obj_dtd - val node_index = the_index - val mutable obj = empty_record # create_element - the_obj_dtd (T_element "record") [] - val root = the_root - val topframe = the_topframe - val mutable wdg = None - - val mutable history = ( [| |] : string array ) - val mutable index = 0 - - initializer - self # load_obj - - method obj = obj - - (* history *) - - method private leave_node = - begin match wdg with - None -> () - | Some w -> Tk.destroy w - end; - wdg <- None - - method private enter_node = - let where = history.(index) in - let n = - try node_index # find where with - Not_found -> failwith ("Mask not found: " ^ where) in - let w = n # extension # create_widget topframe self in - Tk.pack [w] (n # extension # pack_opts @ [ Tk.Expand true] ); - wdg <- Some w - - - - method previous = - if index > 0 then - index <- index - 1 - else - raise Not_found; - self # leave_node; - self # enter_node; - - - method next = - if index < Array.length history - 1 then - index <- index + 1 - else - raise Not_found; - self # leave_node; - self # enter_node; - - - method goto where = - assert (index <= Array.length history); - self # leave_node; - let persisting_history = - if index < Array.length history then - Array.sub history 0 (index+1) - else - history - in - history <- Array.concat [ persisting_history; [| where |] ]; - index <- Array.length history - 1; - self # enter_node; - - - method current = - if index < Array.length history then - history.(index) - else - raise Not_found - - - (* read, write the slots of object *) - - method search_slot name = - let rec search n = - match n # node_type with - T_element "string" -> - if n # required_string_attribute "name" = name then - n - else raise Not_found - | T_element _ -> - search_list (n # sub_nodes) - | T_data -> - raise Not_found - | _ -> - assert false - - and search_list l = - match l with - x :: l' -> - (try search x with Not_found -> search_list l') - | [] -> - raise Not_found - in - search obj - - method get_slot name = - let d = (self # search_slot name) # data in - d - - method set_slot name value = - let dtd = obj # dtd in - begin try - let n = self # search_slot name in - n # delete - with - Not_found -> () - end; - let e_string = empty_record # create_element dtd (T_element "string") - [ "name", name ] in - let dnode = empty_dnode # create_data dtd value in - e_string # add_node dnode; - e_string # local_validate(); - obj # add_node e_string; - assert(self # get_slot name = value) - - (* load, save object *) - - - method load_obj = - if Sys.file_exists filename then begin - obj <- parse_content_entity - default_config - (from_file filename) - obj_dtd - default_spec - end - else begin - print_string "New file!\n"; - flush stdout - end - - - method save_obj = - let fd = open_out filename in - try - - let re1 = Str.regexp "&" in - let re2 = Str.regexp "<" in - let re3 = Str.regexp "'" in - let re4 = Str.regexp ">" in - let protect s = - let s1 = Str.global_replace re1 "&" s in - let s2 = Str.global_replace re2 "<" s1 in - let s3 = Str.global_replace re3 "'" s2 in - let s4 = Str.global_replace re2 ">" s1 in - s3 - in - - let rec iterate (n : 'node extension node as 'node) = - match n # node_type with - T_data -> - output_string fd (protect (n # data)) - | T_element name -> - output_string fd ("<" ^ name ^ "\n"); - let anames = n # attribute_names in - List.iter - (fun aname -> - let aval = n # attribute aname in - let v = - match aval with - Value s -> - aname ^ "='" ^ protect s ^ "'\n" - | Valuelist l -> - aname ^ "='" ^ String.concat " " (List.map protect l) ^ "'\n" - | Implied_value -> - "" - in - output_string fd v) - anames; - output_string fd ">"; - List.iter iterate (n # sub_nodes); - output_string fd (""); - | _ -> - assert false - in - - output_string fd "\n"; - iterate obj; - close_out fd - with - e -> - close_out fd; - raise e - - end -;; - - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:31 lpadovan - * Initial revision - * - * Revision 1.7 2000/08/30 15:58:49 gerd - * Updated. - * - * Revision 1.6 2000/07/23 20:25:05 gerd - * Update because of API change: local_validate. - * - * Revision 1.5 2000/07/16 19:36:03 gerd - * Updated. - * - * Revision 1.4 2000/07/08 22:03:11 gerd - * Updates because of PXP interface changes. - * - * Revision 1.3 2000/06/04 20:29:19 gerd - * Updates because of renamed PXP modules. - * - * Revision 1.2 2000/05/30 00:09:08 gerd - * Minor fix. - * - * Revision 1.1 1999/08/21 19:11:05 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_style.ml b/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_style.ml deleted file mode 100644 index 08d0daa03..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/ds_style.ml +++ /dev/null @@ -1,778 +0,0 @@ -(* $Id$ - * ---------------------------------------------------------------------- - * - *) - -open Pxp_types -open Pxp_document -open Ds_context - - -let get_dimension s = - let re = Str.regexp "\\([0-9]*\\(.[0-9]+\\)?\\)[ \t\n]*\\(px\\|cm\\|in\\|mm\\|pt\\)" in - if Str.string_match re s 0 then begin - let number = Str.matched_group 1 s in - let dim = Str.matched_group 3 s in - match dim with - "px" -> Tk.Pixels (int_of_float (float_of_string number)) - | "cm" -> Tk.Centimeters (float_of_string number) - | "in" -> Tk.Inches (float_of_string number) - | "mm" -> Tk.Millimeters (float_of_string number) - | "pt" -> Tk.PrinterPoint (float_of_string number) - | _ -> assert false - end - else - failwith ("Bad dimension: " ^ s) -;; - - -class virtual shared = - object(self) - - (* --- default_ext --- *) - - val mutable node = (None : shared node option) - - method clone = {< >} - method node = - match node with - None -> - assert false - | Some n -> n - method set_node n = - node <- Some n - - (* --- shared attributes: color & font settings --- *) - - val mutable fgcolor = (None : string option) - val mutable bgcolor = (None : string option) - val mutable font = (None : string option) - - method fgcolor = - (* Get the foreground color: If there is a local value, return it; - * otherwise ask parent node - *) - match fgcolor with - Some c -> c - | None -> try self # node # parent # extension # fgcolor with - Not_found -> failwith "#fgcolor" - - method bgcolor = - (* Get the background color: If there is a local value, return it; - * otherwise ask parent node - *) - match bgcolor with - Some c -> c - | None -> try self # node # parent # extension # bgcolor with - Not_found -> failwith "#bgcolor" - - method font = - (* Get the current font: If there is a local value, return it; - * otherwise ask parent node - *) - match font with - Some c -> c - | None -> try self # node # parent # extension # font with - Not_found -> failwith "#font" - - method private init_color_and_font = - let get_color n = - try - match self # node # attribute n with - Value v -> Some v - | Implied_value -> None - | _ -> assert false - with Not_found -> None in - fgcolor <- get_color "fgcolor"; - bgcolor <- get_color "bgcolor"; - font <- get_color "font"; (* sic! *) - - - method private bg_color_opt = - [ Tk.Background (Tk.NamedColor (self # bgcolor)) ] - - method private fg_color_opt = - [ Tk.Foreground (Tk.NamedColor (self # fgcolor)) ] - - method private font_opt = - [ Tk.Font (self # font) ] - - (* --- virtual --- *) - - method virtual prepare : shared Pxp_yacc.index -> unit - method virtual create_widget : Widget.widget -> context -> Widget.widget - - method pack_opts = ( [] : Tk.options list ) - method xstretchable = false - method ystretchable = false - - method accept (c:context) = () - - method private get_mask = - (* find parent which is a mask *) - let rec search n = - match n # node_type with - T_element "mask" -> - n # extension - | T_element _ -> - search (n # parent) - | _ -> - assert false - in - search (self # node) - - - method private accept_mask (c:context) = - let rec iterate n = - n # extension # accept c; - List.iter iterate (n # sub_nodes) - in - iterate (self # get_mask # node) - - - method start_node_name = - (failwith "#start_node_name" : string) - - (* --- debug --- *) - - method private name = - let nt = self # node # node_type in - match nt with - T_element n -> n - | T_data -> "#PCDATA" - | _ -> assert false - - end -;; - - -class default = - object (self) - inherit shared - - method prepare idx = - self # init_color_and_font - - method create_widget w c = - failwith "default # create_widget" - end -;; - - -let dummy_node = new element_impl (new default);; - -class application = - object (self) - inherit shared - - val mutable start_node = dummy_node - - method prepare idx = - (* prepare this node *) - self # init_color_and_font; - if fgcolor = None then fgcolor <- Some "black"; - if bgcolor = None then bgcolor <- Some "white"; - if font = None then font <- Some "fixed"; - let start = - match self # node # attribute "start" with - Value v -> v - | _ -> assert false in - start_node <- (try idx # find start with - Not_found -> failwith "Start node not found"); - (* iterate over the subtree *) - let rec iterate n = - n # extension # prepare idx; - List.iter iterate (n # sub_nodes) - in - List.iter iterate (self # node # sub_nodes) - - - method start_node_name = - match self # node # attribute "start" with - Value v -> v - | _ -> assert false - - method create_widget w c = - start_node # extension # create_widget w c - - method pack_opts = - start_node # extension # pack_opts - end -;; - - -class sequence = - object (self) - inherit shared - - method prepare idx = - self # init_color_and_font; - - method create_widget w c = - let node = List.hd (self # node # sub_nodes) in - node # extension # create_widget w c - - method pack_opts = - let node = List.hd (self # node # sub_nodes) in - node # extension # pack_opts - end -;; - - -class vbox = - object (self) - inherit shared - - val mutable att_halign = "left" - - method prepare idx = - self # init_color_and_font; - match self # node # attribute "halign" with - Value v -> att_halign <- v - | _ -> assert false - - method create_widget w c = - let f = Frame.create w (self # bg_color_opt) in - let nodes = self # node # sub_nodes in - let options = - match att_halign with - "left" -> [ Tk.Anchor Tk.W ] - | "right" -> [ Tk.Anchor Tk.E ] - | "center" -> [ Tk.Anchor Tk.Center ] - | _ -> assert false - in - List.iter - (fun n -> - let opts = n # extension # pack_opts in - let wdg = n # extension # create_widget f c in - Tk.pack [wdg] (options @ opts); - ) - nodes; - f - - method pack_opts = - match self # xstretchable, self # ystretchable with - true, false -> [ Tk.Fill Tk.Fill_X; (* Tk.Expand true *) ] - | false, true -> [ Tk.Fill Tk.Fill_Y; (* Tk.Expand true *) ] - | true, true -> [ Tk.Fill Tk.Fill_Both; (* Tk.Expand true *) ] - | false, false -> [] - - method xstretchable = - let nodes = self # node # sub_nodes in - List.exists (fun n -> n # extension # xstretchable) nodes - - method ystretchable = - let nodes = self # node # sub_nodes in - List.exists (fun n -> n # extension # ystretchable) nodes - - end - -;; - - -class mask = - object (self) - - inherit vbox - - method prepare idx = - self # init_color_and_font; - att_halign <- "left" - end -;; - - -class hbox = - object (self) - inherit shared - - val mutable att_width = None - val mutable att_halign = "left" - val mutable att_valign = "top" - - method prepare idx = - self # init_color_and_font; - begin match self # node # attribute "halign" with - Value v -> att_halign <- v - | _ -> assert false - end; - begin match self # node # attribute "valign" with - Value v -> att_valign <- v - | _ -> assert false - end; - begin match self # node # attribute "width" with - Value v -> att_width <- Some (get_dimension v) - | Implied_value -> att_width <- None - | _ -> assert false - end - - method create_widget w c = - let f1 = Frame.create w (self # bg_color_opt) in - let f_extra = - match att_width with - None -> [] - | Some wd -> - [ Canvas.create f1 - ( [ Tk.Width wd; Tk.Height (Tk.Pixels 0); - Tk.Relief Tk.Flat; - Tk.HighlightThickness (Tk.Pixels 0); - ] @ - self # bg_color_opt ) ] - in - let f2 = Frame.create f1 (self # bg_color_opt) in - let nodes = self # node # sub_nodes in - - let outer_pack_opts = - match att_halign with - "left" -> [ Tk.Anchor Tk.W ] - | "right" -> [ Tk.Anchor Tk.E ] - | "center" -> [ Tk.Anchor Tk.Center ] - | _ -> assert false - in - let inner_pack_opts = - match att_valign with - "top" -> [ Tk.Anchor Tk.N ] - | "bottom" -> [ Tk.Anchor Tk.S ] - | "center" -> [ Tk.Anchor Tk.Center ] - | _ -> assert false - in - List.iter - (fun n -> - let opts = n # extension # pack_opts in - let wdg = n # extension # create_widget f2 c in - Tk.pack [wdg] (inner_pack_opts @ [ Tk.Side Tk.Side_Left ] @ opts); - ) - nodes; - let extra_opts = self # pack_opts in - Tk.pack (f_extra @ [f2]) (outer_pack_opts @ extra_opts); - f1 - - method pack_opts = - match self # xstretchable, self # ystretchable with - true, false -> [ Tk.Fill Tk.Fill_X; (* Tk.Expand true *) ] - | false, true -> [ Tk.Fill Tk.Fill_Y; (* Tk.Expand true *) ] - | true, true -> [ Tk.Fill Tk.Fill_Both; (* Tk.Expand true *) ] - | false, false -> [] - - method xstretchable = - let nodes = self # node # sub_nodes in - List.exists (fun n -> n # extension # xstretchable) nodes - - method ystretchable = - let nodes = self # node # sub_nodes in - List.exists (fun n -> n # extension # ystretchable) nodes - - end -;; - -class vspace = - object (self) - inherit shared - - val mutable att_height = Tk.Pixels 0 - val mutable att_fill = false - - method prepare idx = - self # init_color_and_font; - begin match self # node # attribute "height" with - Value v -> att_height <- get_dimension v - | _ -> assert false - end; - begin match self # node # attribute "fill" with - Value "yes" -> att_fill <- true - | Value "no" -> att_fill <- false - | _ -> assert false - end - - - method create_widget w c = - let f = Frame.create w ( self # bg_color_opt ) in - let strut = - Canvas.create f - ( [ Tk.Height att_height; Tk.Width (Tk.Pixels 0); - Tk.Relief Tk.Flat; - Tk.HighlightThickness (Tk.Pixels 0); - ] @ - self # bg_color_opt ) in - if att_fill then - Tk.pack [strut] [Tk.Fill Tk.Fill_Y; Tk.Expand true] - else - Tk.pack [strut] []; - f - - method pack_opts = - if att_fill then [ Tk.Fill Tk.Fill_Y; Tk.Expand true ] else [] - - method ystretchable = att_fill - end -;; - -class hspace = - object (self) - inherit shared - - - val mutable att_width = Tk.Pixels 0 - val mutable att_fill = false - - method prepare idx = - self # init_color_and_font; - begin match self # node # attribute "width" with - Value v -> att_width <- get_dimension v - | _ -> assert false - end; - begin match self # node # attribute "fill" with - Value "yes" -> att_fill <- true - | Value "no" -> att_fill <- false - | _ -> assert false - end - - - method create_widget w c = - let f = Frame.create w ( self # bg_color_opt ) in - let strut = - Canvas.create f - ( [ Tk.Width att_width; Tk.Height (Tk.Pixels 0); - Tk.Relief Tk.Flat; - Tk.HighlightThickness (Tk.Pixels 0); - ] @ - self # bg_color_opt ) in - if att_fill then - Tk.pack [strut] [Tk.Fill Tk.Fill_X; Tk.Expand true] - else - Tk.pack [strut] []; - f - - method pack_opts = - if att_fill then [ Tk.Fill Tk.Fill_X; Tk.Expand true ] else [] - - method xstretchable = att_fill - end -;; - -class label = - object (self) - inherit shared - - val mutable att_textwidth = (-1) - val mutable att_halign = "left" - - method prepare idx = - self # init_color_and_font; - att_textwidth <- (match self # node # attribute "textwidth" with - Value v -> - let w = try int_of_string v - with _ -> failwith ("Not an integer: " ^ v) in - w - | Implied_value -> - (-1) - | _ -> assert false); - att_halign <- (match self # node # attribute "halign" with - Value v -> v - | _ -> assert false); - - - method create_widget w c = - let opts_textwidth = if att_textwidth < 0 then [] else - [ Tk.TextWidth att_textwidth ] in - let opts_halign = - match att_halign with - "left" -> [ Tk.Anchor Tk.W ] - | "right" -> [ Tk.Anchor Tk.E ] - | "center" -> [ Tk.Anchor Tk.Center ] - | _ -> assert false - in - let opts_content = - [ Tk.Text (self # node # data) ] in - let label = Label.create w (opts_textwidth @ opts_halign @ - opts_content @ self # bg_color_opt @ - self # fg_color_opt @ self # font_opt) in - label - - end -;; - -class entry = - object (self) - inherit shared - - val mutable tv = lazy (Textvariable.create()) - val mutable att_textwidth = (-1) - val mutable att_slot = "" - - method prepare idx = - self # init_color_and_font; - tv <- lazy (Textvariable.create()); - att_textwidth <- (match self # node # attribute "textwidth" with - Value v -> - let w = try int_of_string v - with _ -> failwith ("Not an integer: " ^ v) in - w - | Implied_value -> - (-1) - | _ -> assert false); - att_slot <- (match self # node # attribute "slot" with - Value v -> v - | _ -> assert false); - - method create_widget w c = - let opts_textwidth = if att_textwidth < 0 then [] else - [ Tk.TextWidth att_textwidth ] in - let e = Entry.create w ( [ Tk.TextVariable (Lazy.force tv) ] @ - self # fg_color_opt @ - self # bg_color_opt @ - self # font_opt @ - opts_textwidth - ) in - let s = - try c # get_slot att_slot with - Not_found -> self # node # data in - Textvariable.set (Lazy.force tv) s; - e - - method accept c = - c # set_slot att_slot (Textvariable.get (Lazy.force tv)) - - end -;; - -class textbox = - object (self) - inherit shared - - val mutable att_textwidth = (-1) - val mutable att_textheight = (-1) - val mutable att_slot = "" - val mutable last_widget = None - - method prepare idx = - self # init_color_and_font; - att_textwidth <- (match self # node # attribute "textwidth" with - Value v -> - let w = try int_of_string v - with _ -> failwith ("Not an integer: " ^ v) in - w - | Implied_value -> - (-1) - | _ -> assert false); - att_textheight <- (match self # node # attribute "textheight" with - Value v -> - let w = try int_of_string v - with _ -> failwith ("Not an integer: " ^ v) in - w - | Implied_value -> - (-1) - | _ -> assert false); - att_slot <- (match self # node # attribute "slot" with - Value v -> v - | Implied_value -> "" - | _ -> assert false); - - - method create_widget w c = - let opts_textwidth = if att_textwidth < 0 then [] else - [ Tk.TextWidth att_textwidth ] in - let opts_textheight = if att_textheight < 0 then [] else - [ Tk.TextHeight att_textheight ] in - let f = Frame.create w (self # bg_color_opt) in - let vscrbar = Scrollbar.create f [ Tk.Orient Tk.Vertical ] in - let e = Text.create f ( [ ] @ - self # fg_color_opt @ - self # bg_color_opt @ - self # font_opt @ - opts_textwidth @ opts_textheight - ) in - last_widget <- Some e; - Scrollbar.configure vscrbar [ Tk.ScrollCommand - (fun s -> Text.yview e s); - Tk.Width (Tk.Pixels 9) ]; - Text.configure e [ Tk.YScrollCommand - (fun a b -> Scrollbar.set vscrbar a b) ]; - let s = - if att_slot <> "" then - try c # get_slot att_slot with - Not_found -> self # node # data - else - self # node # data - in - (* Text.insert appends always a newline to the last line; so strip - * an existing newline first - *) - let s' = - if s <> "" & s.[String.length s - 1] = '\n' then - String.sub s 0 (String.length s - 1) - else - s in - Text.insert e (Tk.TextIndex(Tk.End,[])) s' []; - if att_slot = "" then - Text.configure e [ Tk.State Tk.Disabled ]; - Tk.pack [e] [ Tk.Side Tk.Side_Left ]; - Tk.pack [vscrbar] [ Tk.Side Tk.Side_Left; Tk.Fill Tk.Fill_Y ]; - f - - method accept c = - if att_slot <> "" then - match last_widget with - None -> () - | Some w -> - let s = - Text.get - w - (Tk.TextIndex(Tk.LineChar(1,0),[])) - (Tk.TextIndex(Tk.End,[])) in - c # set_slot att_slot s - - end -;; - -class button = - object (self) - inherit shared - - val mutable att_label = "" - val mutable att_action = "" - val mutable att_goto = "" - - method prepare idx = - self # init_color_and_font; - att_label <- (match self # node # attribute "label" with - Value v -> v - | _ -> assert false); - att_action <- (match self # node # attribute "action" with - Value v -> v - | _ -> assert false); - att_goto <- (match self # node # attribute "goto" with - Value v -> v - | Implied_value -> "" - | _ -> assert false); - if att_action = "goto" then begin - try let _ = idx # find att_goto in () with - Not_found -> failwith ("Target `" ^ att_goto ^ "' not found") - end; - if att_action = "list-prev" or att_action = "list-next" then begin - let m = self # get_mask in - if m # node # parent # node_type <> T_element "sequence" then - failwith ("action " ^ att_action ^ " must not be used out of "); - end; - - - method create_widget w c = - let cmd () = - self # accept_mask c; - match att_action with - "goto" -> - c # goto att_goto - | "save" -> - c # save_obj - | "exit" -> - Protocol.closeTk() - | "save-exit" -> - c # save_obj; - Protocol.closeTk() - | "list-prev" -> - let m = self # get_mask # node in - let s = m # parent in - let rec search l = - match l with - x :: y :: l' -> - if y == m then - match x # attribute "name" with - Value s -> c # goto s - | _ -> assert false - else - search (y :: l') - | _ -> () - in - search (s # sub_nodes) - | "list-next" -> - let m = self # get_mask # node in - let s = m # parent in - let rec search l = - match l with - x :: y :: l' -> - if x == m then - match y # attribute "name" with - Value s -> c # goto s - | _ -> assert false - else - search (y :: l') - | _ -> () - in - search (s # sub_nodes) - | "hist-prev" -> - (try c # previous with Not_found -> ()) - | "hist-next" -> - (try c # next with Not_found -> ()) - | _ -> () - in - let b = Button.create w ( [ Tk.Text att_label; Tk.Command cmd ] @ - self # fg_color_opt @ - self # bg_color_opt @ - self # font_opt ) in - b - - - end -;; - - -(**********************************************************************) - -open Pxp_yacc - -let tag_map = - make_spec_from_mapping - ~data_exemplar:(new data_impl (new default)) - ~default_element_exemplar:(new element_impl (new default)) - ~element_mapping: - (let m = Hashtbl.create 50 in - Hashtbl.add m "application" - (new element_impl (new application)); - Hashtbl.add m "sequence" - (new element_impl (new sequence)); - Hashtbl.add m "mask" - (new element_impl (new mask)); - Hashtbl.add m "vbox" - (new element_impl (new vbox)); - Hashtbl.add m "hbox" - (new element_impl (new hbox)); - Hashtbl.add m "vspace" - (new element_impl (new vspace)); - Hashtbl.add m "hspace" - (new element_impl (new hspace)); - Hashtbl.add m "label" - (new element_impl (new label)); - Hashtbl.add m "entry" - (new element_impl (new entry)); - Hashtbl.add m "textbox" - (new element_impl (new textbox)); - Hashtbl.add m "button" - (new element_impl (new button)); - m) - () -;; - -(* ====================================================================== - * History: - * - * $Log$ - * Revision 1.1 2000/11/17 09:57:31 lpadovan - * Initial revision - * - * Revision 1.5 2000/08/30 15:58:49 gerd - * Updated. - * - * Revision 1.4 2000/07/16 19:36:03 gerd - * Updated. - * - * Revision 1.3 2000/07/08 22:03:11 gerd - * Updates because of PXP interface changes. - * - * Revision 1.2 2000/06/04 20:29:19 gerd - * Updates because of renamed PXP modules. - * - * Revision 1.1 1999/08/21 19:11:05 gerd - * Initial revision. - * - * - *) diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/styles/Makefile b/helm/DEVEL/pxp/pxp/examples/xmlforms/styles/Makefile deleted file mode 100644 index c0068a59d..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/styles/Makefile +++ /dev/null @@ -1,16 +0,0 @@ -.PHONY: all -all: - -.PHONY: clean -clean: - -.PHONY: CLEAN -CLEAN: clean - -.PHONY: distclean -distclean: clean - rm -f *~ - -.PHONY: symlinks -symlinks: - for x in *-style.xml; do ln -s ../xmlforms $${x%-style.xml} || true; done diff --git a/helm/DEVEL/pxp/pxp/examples/xmlforms/styles/address-style.xml b/helm/DEVEL/pxp/pxp/examples/xmlforms/styles/address-style.xml deleted file mode 100644 index d3af5daa0..000000000 --- a/helm/DEVEL/pxp/pxp/examples/xmlforms/styles/address-style.xml +++ /dev/null @@ -1,361 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - '> - - - - - - - - - - - - - '> - - - - - - - - - - - - - '> - - - - - - - - - - - -