--- /dev/null
+(* 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 *)
+(* *)
+(* A tactic to print Coq objects in XML *)
+(* *)
+(* Claudio Sacerdoti Coen <sacerdot@cs.unibo.it> *)
+(* 18/10/2000 *)
+(* *)
+(* This module defines a pretty-printer and the stream of commands to the pp *)
+(* *)
+(******************************************************************************)
+
+
+(* the type token for XML cdata, empty elements and not-empty elements *)
+(* Usage: *)
+(* Str cdata *)
+(* Empty (element_name, [attrname1, value1 ; ... ; attrnamen, valuen] *)
+(* NEmpty (element_name, [attrname1, value2 ; ... ; attrnamen, valuen], *)
+(* content *)
+type token = Str of string
+ | Empty of string * (string * string) list
+ | NEmpty of string * (string * string) list * token Stream.t
+;;
+
+(* currified versions of the constructors make the code more readable *)
+let xml_empty name attrs = [< 'Empty(name,attrs) >]
+let xml_nempty name attrs content = [< 'NEmpty(name,attrs,content) >]
+let xml_cdata str = [< 'Str str >]
+
+(* Usage: *)
+(* pp tokens None pretty prints the output on stdout *)
+(* pp tokens (Some filename) pretty prints the output on the file filename *)
+let pp ?(quiet=false) strm fn =
+ let channel = ref stdout in
+ let rec pp_r m =
+ parser
+ [< 'Str a ; s >] ->
+ print_spaces m ;
+ fprint_string (a ^ "\n") ;
+ pp_r m s
+ | [< 'Empty(n,l) ; s >] ->
+ print_spaces m ;
+ fprint_string ("<" ^ n) ;
+ List.iter (function (n,v) -> fprint_string (" " ^ n ^ "=\"" ^ v ^ "\"")) l;
+ fprint_string "/>\n" ;
+ pp_r m s
+ | [< 'NEmpty(n,l,c) ; s >] ->
+ print_spaces m ;
+ fprint_string ("<" ^ n) ;
+ List.iter (function (n,v) -> fprint_string (" " ^ n ^ "=\"" ^ v ^ "\"")) l;
+ fprint_string ">\n" ;
+ pp_r (m+1) c ;
+ print_spaces m ;
+ fprint_string ("</" ^ n ^ ">\n") ;
+ pp_r m s
+ | [< >] -> ()
+ and print_spaces m =
+ for i = 1 to m do fprint_string " " done
+ and fprint_string str =
+ output_string !channel str
+ in
+ match fn with
+ Some filename ->
+ channel := open_out filename ;
+ pp_r 0 strm ;
+ close_out !channel ;
+ if not quiet then
+ begin
+ print_string ("\nWriting on file \"" ^ filename ^
+ "\" was succesfull\n");
+ flush stdout
+ end
+ | None ->
+ pp_r 0 strm
+;;