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Matrix2D.hh

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/*
    libpdf++: a C++ Free library to generate PDF file
    Copyright (C) 2002 Nestal Wan

    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 2.1 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
*/
#ifndef __PDF_UTIL_MATRIX_HEADER_INCLUDED__
#define __PDF_UTIL_MATRIX_HEADER_INCLUDED__

#include <ext/algorithm>
#include <iosfwd>
#include <algorithm>

namespace pdf { namespace util {

class CMatrix2D
{
private :
    static const int matrix_size = 6 ;
    double m_matrix[matrix_size] ;

public :
    typedef const double* iterator ;
    typedef double        value_type ;
    typedef unsigned      size_type ;

public :
    CMatrix2D( ) ;
    
    template <typename InputIt>
    CMatrix2D( InputIt first )
    {
        __gnu_cxx::copy_n( first, matrix_size, m_matrix ) ;
    }
    
    CMatrix2D( const CMatrix2D& matrix ) ;
    CMatrix2D( double d0, double d1, double d2,
               double d3, double d4, double d5 ) ;

    void LoadIdentity( ) ;
    void Assign( double d0, double d1, double d2,
                 double d3, double d4, double d5 ) ;
    
    iterator begin( ) const { return m_matrix ; }
    iterator end( ) const { return m_matrix + matrix_size ; }
    
    size_type size( ) const { return matrix_size ; }

    std::ostream& Print( std::ostream& os ) const ;
    
    void Swap( CMatrix2D& m2 ) ;

    bool operator==( const CMatrix2D& matrix ) const ;
    bool operator!=( const CMatrix2D& matrix ) const
        { return !operator==( matrix ) ; }

    CMatrix2D& operator=( const CMatrix2D& matrix ) ;
} ;

inline std::ostream& operator<<( std::ostream& os, const CMatrix2D& matrix )
{
    return matrix.Print( os ) ;
}

} } // end of namespace

namespace std
{
    template <>
    inline void swap<pdf::util::CMatrix2D>( pdf::util::CMatrix2D& m1,
                                            pdf::util::CMatrix2D& m2 )
    {
        m1.Swap( m2 ) ;
    }
}

#endif

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