HELM OCaml libraries with findlib support.

[helm.git] / helm / ocaml / cic / cicParser.ml

diff --git a/helm/ocaml/cic/cicParser.ml b/helm/ocaml/cic/cicParser.ml
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+(* Copyright (C) 2000, HELM Team.
+ * 
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ * 
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ * 
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
+
+(******************************************************************************)
+(*                                                                            *)
+(*                               PROJECT HELM                                 *)
+(*                                                                            *)
+(*                Claudio Sacerdoti Coen <sacerdot@cs.unibo.it>               *)
+(*                                 24/01/2000                                 *)
+(*                                                                            *)
+(* This is the main (top level) module of a parser for cic objects from xml   *)
+(* files to the internal representation. It uses the modules cicParser2       *)
+(* (objects level) and cicParser3 (terms level)                               *)
+(*                                                                            *)
+(******************************************************************************)
+
+exception Warnings;;
+
+class warner =
+  object 
+    method warn w =
+      print_endline ("WARNING: " ^ w) ;
+      (raise Warnings : unit)
+  end
+;;
+
+exception EmptyUri;;
+
+(* given an uri u it returns the list of tokens of the base uri of u *)
+(* e.g.: token_of_uri "cic:/a/b/c/d.xml" returns ["a" ; "b" ; "c"]   *)
+let tokens_of_uri uri =
+ let uri' = UriManager.string_of_uri uri in
+ let rec chop_list =
+  function
+     [] -> raise EmptyUri
+   | he::[fn] -> [he]
+   | he::tl -> he::(chop_list tl)
+ in
+  let trimmed_uri = Str.replace_first (Str.regexp "cic:") "" uri' in
+   let list_of_tokens = Str.split (Str.regexp "/") trimmed_uri in
+    chop_list list_of_tokens
+;;
+
+(* given the filename of an xml file of a cic object it returns its internal *)
+(* representation. process_annotations is true if the annotations do really  *)
+(* matter                                                                    *)
+let term_of_xml filename uri process_annotations =
+ let module Y = Pxp_yacc in
+  try 
+    let d =
+      (* sets the current base uri to resolve relative URIs *)
+      CicParser3.current_sp := tokens_of_uri uri ;
+      CicParser3.current_uri := uri ;
+      CicParser3.process_annotations := process_annotations ;
+      CicParser3.ids_to_targets :=
+       if process_annotations then Some (Hashtbl.create 500) else None ;
+      let config = {Y.default_config with Y.warner = new warner} in
+      Y.parse_document_entity config
+(*PXP       (Y.ExtID (Pxp_types.System filename,
+         new Pxp_reader.resolve_as_file ~url_of_id ()))
+*)     (PxpUriResolver.from_file filename)
+       CicParser3.domspec
+    in
+     let ids_to_targets = !CicParser3.ids_to_targets in
+      let res = (CicParser2.get_term d#root, ids_to_targets) in
+       CicParser3.ids_to_targets := None ; (* let's help the GC *)
+       res
+  with
+   e ->
+     print_endline ("Filename: " ^ filename ^ "\nException: ") ;
+     print_endline (Pxp_types.string_of_exn e) ;
+     raise e
+;;