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/*
* Copyright (c) 1998, 1999, 2000, 2001 Virtual Unlimited B.V.
*
* 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
*
*/
/*!\file endianness.c
* \brief Endian-dependant encoding/decoding.
* \author Bob Deblier <bob.deblier@pandora.be>
*/
#define BEECRYPT_DLL_EXPORT
#if HAVE_CONFIG_H
# include "config.h"
#endif
#if HAVE_ENDIAN_H && HAVE_ASM_BYTEORDER_H
# include <endian.h>
#endif
#include "beecrypt/endianness.h"
#undef swap16
#undef swapu16
#undef swap32
#undef swapu32
#undef swap64
#undef swapu64
int16_t swap16(int16_t n)
{
return ( ((n & 0xff) << 8) |
((n & 0xff00) >> 8) );
}
uint16_t swapu16(uint16_t n)
{
return ( ((n & 0xffU) << 8) |
((n & 0xff00U) >> 8) );
}
int32_t swap32(int32_t n)
{
return ( ((n & 0xff) << 24) |
((n & 0xff00) << 8) |
((n & 0xff0000) >> 8) |
((n & 0xff000000) >> 24) );
}
uint32_t swapu32(uint32_t n)
{
return ( ((n & 0xffU) << 24) |
((n & 0xff00U) << 8) |
((n & 0xff0000U) >> 8) |
((n & 0xff000000U) >> 24) );
}
int64_t swap64(int64_t n)
{
return ( ((n & (((int64_t) 0xff) )) << 56) |
((n & (((int64_t) 0xff) << 8)) << 40) |
((n & (((int64_t) 0xff) << 16)) << 24) |
((n & (((int64_t) 0xff) << 24)) << 8) |
((n & (((int64_t) 0xff) << 32)) >> 8) |
((n & (((int64_t) 0xff) << 40)) >> 24) |
((n & (((int64_t) 0xff) << 48)) >> 40) |
((n & (((int64_t) 0xff) << 56)) >> 56) );
}
uint64_t swapu64(uint64_t n)
{
return ( ((n & (((uint64_t) 0xff) )) << 56) |
((n & (((uint64_t) 0xff) << 8)) << 40) |
((n & (((uint64_t) 0xff) << 16)) << 24) |
((n & (((uint64_t) 0xff) << 24)) << 8) |
((n & (((uint64_t) 0xff) << 32)) >> 8) |
((n & (((uint64_t) 0xff) << 40)) >> 24) |
((n & (((uint64_t) 0xff) << 48)) >> 40) |
((n & (((uint64_t) 0xff) << 56)) >> 56) );
}
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