Rational.hpp

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/*
    libglim: a C++ Free library render images using OpenGL
    Copyright (C) 2002 Nestal Wan

    This library 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 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
    General Public License for more details.

    You should have received a copy of the GNU 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
*/
#ifndef __PICINFO_RATIONAL_HEADER_INCLUDED__
#define __PICINFO_RATIONAL_HEADER_INCLUDED__

#include <ostream>

namespace picinfo {

template <typename T>
struct Rational
{
    T   numerator ;
    T   dominator ;
    
    operator double( ) const
    {
        return static_cast<double>( numerator ) /
               static_cast<double>( dominator ) ;
    }
    
    operator uint32_t( ) const
    {
        return numerator / dominator ;
    }

    operator int32_t( ) const
    {
        return numerator / dominator ;
    }

    operator uint16_t( ) const
    {
        return static_cast<uint16_t>(numerator / dominator) ;
    }

    operator int16_t( ) const
    {
        return static_cast<int16_t>(numerator / dominator) ;
    }

    operator int8_t( ) const
    {
        return static_cast<uint8_t>( numerator / dominator ) ;
    }

    operator uint8_t( ) const
    {
        return static_cast<uint8_t>( numerator / dominator ) ;
    }
    
    Rational( T num = 0, T dom = 1 ) : numerator( num ), dominator( dom )
    {
    }
} ;

template <typename T>
std::ostream& operator<<( std::ostream& os, const Rational<T>& rat )
{
    return os << rat.numerator << '/' << rat.dominator ;
}

} // end of namespace

#endif

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