mootNgramsCompiler.h

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/* -*- Mode: C++ -*- */

/*
   libmoot : moocow's part-of-speech tagging library
   Copyright (C) 2003-2009 by Bryan Jurish <moocow@cpan.org>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.
   
   This library 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
   Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

/*============================================================================
 * File: mootNgramsCompiler.h
 * Author:  Bryan Jurish <moocow@cpan.org>
 * Description:
 *    Compiler for TnT parameter files for moot PoS tagger
 *============================================================================*/

#ifndef _moot_NGRAMS_COMPILER_H
#define _moot_NGRAMS_COMPILER_H

#include "mootNgramsLexer.h"
//#include "mootNgramsParser.h" //-- used by mootNgramsLexer.h

moot_BEGIN_NAMESPACE

class mootNgramsCompiler : public mootNgramsParser {
 public:
  // -- public data
  mootNgramsLexer theLexer;

  const char *objname;

  const char *srcname;

 public:
  // -- public methods: CONSTRUCTORS / DESTRUCTORS
  mootNgramsCompiler() : objname(NULL), srcname(NULL) {};
  virtual ~mootNgramsCompiler() {};

  // -- high-level parsing methods

  inline mootNgrams *parse_from_file(FILE *file, const char *filename=NULL) {
      select_streams(file,stdout);
      return parse_ngrams();
  };

  inline mootNgrams *parse_from_string(const char *string, const char *srcname=NULL) {
    select_string(string,srcname);
    return parse_ngrams();
  };
    
  // -- low-level public methods: INPUT SELECTION
  void select_streams(FILE *in, FILE *out, const char *my_srcname=NULL) {
    theLexer.select_streams(in,out);
    srcname = my_srcname;
  };

  void select_string(const char *in, const char *my_srcname=NULL) {
    theLexer.select_string(in);
    srcname = my_srcname;
  };

  // -- low-level public methods: PARSING
  virtual int yylex();

  mootNgrams *parse_ngrams();

  // -- low-level public methods: ERRORS & WARNINGS
  virtual void yyerror(const char *msg);

  virtual void yywarn(const char *msg);
};


moot_END_NAMESPACE

#endif /* _moot_NGRAMS_COMPILER_H */