Hi Robert,
... and fix a gcc warning :)
Use a union to determine if we are on a little endian or big endian machine.
Based on rev 10395.
Please apply
Greetings
Mathias
--
Dr. Mathias Fröhlich, science + computing ag, Software Solutions
Hagellocher Weg 71-75, D-72070 Tuebingen, Germany
Phone: +49 7071 9457-268, Fax: +49 7071 9457-511
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Dr. Bernd Finkbeiner, Dr. Roland Niemeier,
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* 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
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_ENDIAN
#define OSG_ENDIAN 1
#include <algorithm>
namespace osg {
enum Endian
{
BigEndian,
LittleEndian
};
inline Endian getCpuByteOrder()
{
union {
char big_endian_1[2];
short is_it_really_1;
} u;
u.big_endian_1[0] = 0;
u.big_endian_1[1] = 1;
if (u.is_it_really_1 == 1)
return BigEndian;
else
return LittleEndian;
}
inline void swapBytes( char* in, unsigned int size )
{
char* start = in;
char* end = start+size-1;
while (start<end)
{
std::swap(*start++,*end--);
}
}
inline void swapBytes2( char* in )
{
std::swap(in[0],in[1]);
}
inline void swapBytes4( char* in )
{
std::swap(in[0],in[3]);
std::swap(in[1],in[2]);
}
inline void swapBytes8( char* in )
{
std::swap(in[0],in[7]);
std::swap(in[1],in[6]);
std::swap(in[2],in[5]);
std::swap(in[3],in[4]);
}
inline void swapBytes16( char* in )
{
std::swap(in[0],in[15]);
std::swap(in[1],in[14]);
std::swap(in[2],in[13]);
std::swap(in[3],in[12]);
std::swap(in[4],in[11]);
std::swap(in[5],in[10]);
std::swap(in[6],in[9]);
std::swap(in[7],in[8]);
}
}
#endif
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