---

EndianOut.cpp

Go to the documentation of this file.

/*
    TEDDY - General graphics application library
    Copyright (C) 1999-2002  Timo Suoranta
    tksuoran@cc.helsinki.fi

    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

    $Id: EndianOut.cpp,v 1.4 2002/01/11 14:35:03 tksuoran Exp $
*/


#include "Teddy/SysSupport/EndianOut.h"
#include "Teddy/SysSupport/Exception.h"


namespace Teddy      {
namespace SysSupport {


EndianOut::EndianOut( const char *file_name ){
    open( file_name );
}


EndianOut::~EndianOut(){
    close();
}


void EndianOut::open( const char *name ){
    ofs = new ofstream( name,ios::out|ios::trunc|ios::binary );
}


void EndianOut::close(){
    ofs->close(), ofs = NULL;
}


void EndianOut::write_byte( const int item ){
    if( !ofs->put((unsigned char)item) ){
        throw( Exception("EOF write error") );
    }
}


void EndianOut::write_short( const unsigned short item ){
    if( q_MSBfirst() ){
        write_byte((item>>8) & 0xff ),
        write_byte(item & 0xff );
    }else{
        write_byte(item & 0xff ),
        write_byte((item>>8) & 0xff );
    }
}


void EndianOut::write_long( const unsigned long item ){
    unsigned int t = item;
    int i;

    if( q_MSBfirst() ){
        for(i=24; i>=0; i-=8){
            write_byte((t >> i) & 0xff );
        }
    }else{
        for(i=0; i<4; i++){
            write_byte(t & 0xff ), t >>= 8;
        }
    }
}


void EndianOut::write_float( const float item ){
    unsigned int t = *(unsigned int *)(&item);
    int i;

    if( q_MSBfirst() ){
        for(i=24; i>=0; i-=8){
            write_byte((t >> i) & 0xff );
        }
    }else{
        for(i=0; i<4; i++){
            write_byte(t & 0xff ), t >>= 8;
        }
    }
}


};  //  namespace SysSupport
};  //  namespace Teddy