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/* endian swaps
*
* Copyright (c) 2004 David Hammerton
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef ENDIAN_SWAP_H_
#define ENDIAN_SWAP_H_
#include "portability.h"
#ifdef WORDS_BIGENDIAN
#define __Swap16(v) (v)
#define __Swap32(v) (v)
#define __Swap64(v) (v)
#define __SwapPtr64(v)
#else /* WORDS_BIGENDIAN */
#define __Swap16(v) ((((v) & 0x00FF) << 0x08) | \
(((v) & 0xFF00) >> 0x08))
#define __Swap32(v) ((((v) & 0x000000FF) << 0x18) | \
(((v) & 0x0000FF00) << 0x08) | \
(((v) & 0x00FF0000) >> 0x08) | \
(((v) & 0xFF000000) >> 0x18))
/* Microsft Visual C++ doesn't like this */
/*
#define __Swap64(v) ((((v) & 0x00000000000000FFLL) >> 0x38) | \
(((v) & 0x000000000000FF00LL) >> 0x28) | \
(((v) & 0x0000000000FF0000LL) >> 0x18) | \
(((v) & 0x00000000FF000000LL) >> 0x08) | \
(((v) & 0x000000FF00000000LL) << 0x08) | \
(((v) & 0x0000FF0000000000LL) << 0x18) | \
(((v) & 0x00FF000000000000LL) << 0x28) | \
(((v) & 0xFF00000000000000LL) << 0x38))*/
static void __SwapPtr64(int64_t *v)
{
unsigned char b, *bv;
bv = (unsigned char*)v;
b = bv[0];
bv[0] = bv[7];
bv[7] = b;
b = bv[1];
bv[1] = bv[6];
bv[6] = b;
b = bv[2];
bv[2] = bv[5];
bv[5] = b;
b = bv[3];
bv[3] = bv[4];
bv[4] = b;
}
#endif /* WORDS_BIGENDIAN */
#endif /* ENDIAN_SWAP_H */
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