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WordsFile.h

/*
 * Aiksaurus - An English-language thesaurus library
 * Copyright (C) 2001-2002 by Jared Davis
 *
 * 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.
 *
 */

#ifndef INCLUDED_WORDSFILE_H
#define INCLUDED_WORDSFILE_H

#include <cstdio>
#include "AiksaurusException.h"   

namespace AiksaurusImpl
{
    class WordsFile
    {
        private:

        // No copying or assignment allowed.
            WordsFile(const WordsFile& rhs);
            WordsFile& operator=(const WordsFile& rhs);
        
        // Static information about our datafile.
            static const int s_offsetModulus;
            static const int s_offsetData[];
            static const int s_numLines;
            static const int s_maxWordLength;
            static const int s_maxLinks;
   
        // File pointer to the datafile itself.
            FILE* d_file_ptr;
            
        // Storage for loading each word.
            char *d_word;
            int *d_links;       
          
        // Helper functions for file i/o   
            void _readWord(); 
            
        public:

        // Creation and Destruction
            WordsFile(const char* fname) throw(AiksaurusException);
            ~WordsFile() throw();
        
        // Word Lookup        
            void loadWord(int id) throw(AiksaurusException);
            bool findWord(const char* str, int& index) throw(AiksaurusException);

        // Inspection  
            int getSize() const throw();
            const char* getWord() const throw();
            const int* getLinks() const throw();
            
        // Constants
            static int maxWordLength() throw();    
    };

}
    
#endif // INCLUDED_WORDSFILE_H


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