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lex_yacc_parser.cc

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/*
 *  File:       lex_yacc_parser.cc
 *              $Id: lex_yacc_parser.cc,v 1.8 2002/05/16 22:09:33 alec Exp $
 *
 *  Author:     Alec Panoviciu (alecu@email.com)
 *
 *  Comments:
 *
 *      This is part of the LEX/YACC wrapper. Some of the functions (yyerror,
 *      yywrap etc) are here, but the syntactic hooks are not. You will find
 *      those in c_*_wrapper.[ch][ch] files.
 *
 *  Revision history:
 *
 *  $Log: lex_yacc_parser.cc,v $
 *  Revision 1.8  2002/05/16 22:09:33  alec
 *  sync
 *
 *  Revision 1.7  2002/05/10 07:15:10  alec
 *  parser parse tree ok
 *
 *  Revision 1.6  2002/05/08 18:19:14  alec
 *  *** empty log message ***
 *
 *  Revision 1.5  2002/05/04 17:39:22  alec
 *  the scanner works (slightly tested)
 *
 *  Revision 1.4  2002/04/29 17:55:41  alec
 *  regexps almost done
 *
 *  Revision 1.3  2002/04/29 09:34:10  alec
 *  scanner ptree building compiles
 *
 */

/* 
  Copyright (C) 2002 Alexandru Panoviciu (alecu@email.com)

  This program 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.

  This program 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 this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#include <cstdio>
#include "../config.h"
#include "parse_util.hh"
#include "lex_yacc_parser.hh"

#include "options_recorder.hh"

#include "cw_options_recorder.h"
#include "cw_iscanner_spec.h"
#include "macro_token_expander.hh"
#include "cw_macro_token_expander.h"
#include "token_spec.hh"
#include "cw_itoken_spec.h"
#include "scanner_spec.hh"
#include "cw_re_node_builder.h"
#include "token_spec.hh"
#include "cw_iparser_spec.h"
#include "cw_ebnf_node_builder.h"
#include "parser_spec.hh"

/* LEX/YACC (or should it read yuck ?) interfacing stuff */

#ifdef DEBUG
extern int yy_flex_debug;
extern int yydebug;
#endif

extern "C" int yyparse();
extern "C" int yylex();
extern FILE* yyin;
extern int yylineno;


/* this one is used by formatError and formatWarning to format the messages */
extern string fileName;


bool LexYaccParser::parse (PropRegistry &registry,
                           ITokenSpec &tSpec,
                           IScannerSpec &sSpec,
                           IParserSpec &pSpec)
{

#ifdef DEBUG
  yy_flex_debug = 0;
  yydebug = 0;
  if (((string)registry["debug"]).find('s') != string::npos) yy_flex_debug = 1;
  if (((string)registry["debug"]).find('p') != string::npos) yydebug = 1;
#endif


  if (!(yyin = fopen(((string)registry["input_file"]).c_str(), "r"))) {
    die(formatError(string("Could not open file \"") +
                    registry["input_file"] + "\" for reading."));
  }

  fileName = registry["input_file"];

  if (registry["be_verbose"])
    cout << "Reading from file: " << (string)registry["input_file"] << endl;

  cw_optionsRecorder = new OptionsRecorder(registry);
  cw_macroTokenExpander = new MacroTokenExpander();
  cw_scannerSpec = &sSpec;
  cw_parserSpec = &pSpec;
  cw_reNodeBuilder = &sSpec.getReNodeBuilder();
  cw_tokenSpec = &tSpec;
  cw_ebnfNodeBuilder = &pSpec.getEbnfNodeBuilder();
  
  bool res = yyparse() == 0;

#ifdef DEBUG
  if (((string)registry["debug"]).find('d') != string::npos) {
    sSpec.dump(cerr);
    pSpec.dump(cerr);
  }
#endif
  
  return res;
}

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