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/* ****************************************************************************
* byteswap.c -- default byte swapping utilities.
*
* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
*
* This file is part of the 'all/core' module in libcarrot, an experimental
* modular libc project.
*
* This file 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 3 of the License, or (at your option)
* any later version.
*
* This file 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 Lesser Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this file. If not, see <http://www.gnu.org/licenses/>.
* ************************************************************************* */
#define __NO_BYTESWAP
#include <byteswap.h>
#ifndef __BYTESWAP_SUB16
/**
* bswap_16:
* 16-bit byteswap.
*
* @arg x the integer.
* @return the integer with swapped bytes.
*/
__uint16_t bswap_16(__uint16_t x)
{
# ifdef __bswap_16
return (__bswap_16(x));
# else
x = (x << 8) | (x >> 8);
return (x);
# endif
}
#endif /* __BYTESWAP_SUB32 */
#ifndef __BYTESWAP_SUB32
/**
* bswap_32:
* 32-bit byteswap.
*
* @arg x the integer.
* @return the integer with swapped bytes.
*/
__uint32_t bswap_32(__uint32_t x)
{
# ifdef __bswap_32
return (__bswap_32(x));
# else
x = (x << 16) | (x >> 16);
x = ((x & 0xFF00FF00) >> 8) | ((x & 0x00FF00FF) << 8);
return (x);
# endif
}
#endif /* __BYTESWAP_SUB32 */
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