90 lines
1.9 KiB
C++
90 lines
1.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_ENDIAN
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#define OSG_ENDIAN 1
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#include <algorithm>
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namespace osg {
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enum Endian
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{
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BigEndian,
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LittleEndian
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};
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inline Endian getCpuByteOrder()
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{
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static char big_endian_1[2] = { 0, 1 };
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if ( (*((short*) big_endian_1)) == 1)
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return BigEndian;
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else
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return LittleEndian;
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}
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inline void swapBytes( char* in, unsigned int size )
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{
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char* start = in;
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char* end = start+size-1;
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while (start<end)
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{
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std::swap(*start++,*end--);
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}
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}
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inline void swapBytes2( char* in )
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{
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char* start = in;
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char* end = start+1;
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std::swap(*start,*end);
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}
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inline void swapBytes4( char* in )
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{
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char* start = in;
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char* end = start+3;
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std::swap(*start++,*end--);
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std::swap(*start,*end);
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}
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inline void swapBytes8( char* in )
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{
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char* start = in;
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char* end = start+7;
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std::swap(*start++,*end--);
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std::swap(*start++,*end--);
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std::swap(*start++,*end--);
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std::swap(*start,*end);
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}
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inline void swapBytes16( char* in )
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{
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char* start = in;
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char* end = start+15;
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std::swap(*start++,*end--);
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std::swap(*start++,*end--);
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std::swap(*start++,*end--);
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std::swap(*start++,*end--);
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std::swap(*start++,*end--);
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std::swap(*start++,*end--);
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std::swap(*start++,*end--);
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std::swap(*start,*end);
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}
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}
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#endif
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