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[helm.git] / helm / interface / xml.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                                 *)
-(*                                                                            *)
-(*                     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 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 ;
-       print_string ("\nWriting on file \"" ^ filename ^ "\" was succesfull\n");
-       flush stdout
-   | None ->
-       pp_r 0 strm
-;;