binary_converter.h

/***************************************************************************
 *   Copyright (C) 2004-2006 by Radko Mihal                                *
 *   rmihal@pobox.sk                                                       *
 *                                                                         *
 *   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.,                                       *
 *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
 ***************************************************************************/
#ifndef BINARY_CONVERTER_H
#define BINARY_CONVERTER_H

class c_N
{
typedef grammar_to_parser::parsers parser_list;
        class c_1N
        {
                grammar_to_parser::terminal<'1'>        m_1;
                grammar_to_parser::choice<c_N>          m_N;
        public:
                void push_parsers( parser_list &l )
                {
                        l.push_back(&m_1);
                        l.push_back(&m_N);
                }
                unsigned long evaluate( unsigned long value, unsigned long &exp )
                {
                        value = m_N->evaluate( value, exp );
                        exp = exp * 2;
                        value += exp * 1;
                        return value;
                }
                
        };
        class c_0N
        {
                grammar_to_parser::terminal<'0'>        m_0;
                grammar_to_parser::choice<c_N>          m_N;
        public:
                void push_parsers( parser_list &l )
                {
                        l.push_back(&m_0);
                        l.push_back(&m_N);
                }
                unsigned long evaluate( unsigned long value, unsigned long &exp )
                {
                        value = m_N->evaluate( value, exp );
                        exp = exp * 2;
                        value += exp * 0;
                        return value;
                }
        };
        grammar_to_parser::non_terminal<c_1N>           m_1N;
        grammar_to_parser::non_terminal<c_0N>           m_0N;
        grammar_to_parser::terminal<'1'>                        m_1;
        grammar_to_parser::terminal<'0'>                        m_0;
public:
        void push_parsers( parser_list &l )
        {
                l.push_back(&m_1N);
                l.push_back(&m_0N);
                l.push_back(&m_1);
                l.push_back(&m_0);
        }
        unsigned long evaluate( unsigned long value, unsigned long &exp )
        {
                if( m_1N.is_parsed() ) return m_1N->evaluate( value, exp );
                if( m_0N.is_parsed() ) return m_0N->evaluate( value, exp );
                if( m_1.is_parsed() ) return 1;
                if( m_0.is_parsed() ) return 0;
                return 0;
        }
};

#endif

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