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endian_magic.h
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endian_magic.h
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/*
This file is part of Kismet
Kismet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kismet 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kismet; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __ENDIAN_MAGIC_H__
#define __ENDIAN_MAGIC_H__
#include "config.h"
// Byteswap magic
#ifdef WORDS_BIGENDIAN
#define kis_hton16(x) (x)
#define kis_ntoh16(x) (x)
#define kis_hton32(x) (x)
#define kis_ntoh32(x) (x)
#define kis_hton64(x) (x)
#define kis_ntoh64(x) (x)
#define kis_extract16(x) kis_extractBE16(x)
#define kis_extract32(x) kis_extractBE32(x)
#define kis_extract64(x) kis_extractBE64(x)
#define kis_letoh16(x) kis_swap16((x))
#define kis_betoh16(x) (x)
#define kis_letoh32(x) kis_swap32((x))
#define kis_betoh32(x) (x)
#define kis_htole16(x) kis_swap16((x))
#define kis_htobe16(x) (x)
#define kis_htobe32(x) (x)
#define kis_htole32(x) kis_swap32((x))
#define kis_htobe64(x) (x)
#define kis_htole64(x) kis_swap64((x))
#else
#define kis_hton16(x) kis_swap16((x))
#define kis_ntoh16(x) kis_swap16((x))
#define kis_hton32(x) kis_swap32((x))
#define kis_ntoh32(x) kis_swap32((x))
#define kis_hton64(x) kis_swap64((x))
#define kis_ntoh64(x) kis_swap64((x))
#define kis_extract16(x) kis_extractLE16(x)
#define kis_extract32(x) kis_extractLE32(x)
#define kis_extract64(x) kis_extractLE64(x)
#define kis_betoh16(x) kis_swap16((x))
#define kis_letoh16(x) (x)
#define kis_betoh32(x) kis_swap32((x))
#define kis_letoh32(x) (x)
#define kis_htole16(x) (x)
#define kis_htobe16(x) kis_swap16((x))
#define kis_htole32(x) (x)
#define kis_htobe32(x) kis_swap32((x))
#define kis_htole64(x) (x)
#define kis_htobe64(x) kis_swap64((x))
#endif
// Swap magic
#define kis_swap16(x) \
({ \
uint16_t __x = (x); \
((uint16_t)( \
(uint16_t)(((uint16_t)(__x) & (uint16_t)0x00ff) << 8) | \
(uint16_t)(((uint16_t)(__x) & (uint16_t)0xff00) >> 8) )); \
})
#define kis_swap32(x) \
({ \
uint32_t __x = (x); \
((uint32_t)( \
(uint32_t)(((uint32_t)(__x) & (uint32_t)0x000000ff) << 24) | \
(uint32_t)(((uint32_t)(__x) & (uint32_t)0x0000ff00) << 8) | \
(uint32_t)(((uint32_t)(__x) & (uint32_t)0x00ff0000) >> 8) | \
(uint32_t)(((uint32_t)(__x) & (uint32_t)0xff000000) >> 24) )); \
})
#define kis_swap64(x) \
({ \
uint64_t __x = (x); \
((uint64_t)( \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
})
// Extract magic, also cribbed from tcpdump/ethereal
#define kis_extractLE16(x) \
((uint16_t)((uint16_t)*((const uint8_t *)(x) + 1) << 8 | \
(uint16_t)*((const uint8_t *)(x) + 0)))
#define kis_extractLE32(x) \
((uint32_t)((uint32_t)*((const uint8_t *)(x) + 1) << 24 | \
((uint32_t)((uint32_t)*((const uint8_t *)(x) + 0) << 16 | \
((uint32_t)((uint32_t)*((const uint8_t *)(x) + 3) << 8 | \
(uint32_t)*((const uint8_t *)(x) + 2)))
#define kis_extractLE64(x) \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 1) << 56 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 0) << 48 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 3) << 40 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 2) << 32 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 5) << 24 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 4) << 16 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 7) << 8 | \
(uint64_t)*((const uint8_t *)(x) + 6)))
#define kis_extractBE16(x) \
((uint16_t)((uint16_t)*((const uint8_t *)(x) + 0) << 8 | \
(uint16_t)*((const uint8_t *)(x) + 1)))
#define kis_extractBE32(x) \
((uint32_t)((uint32_t)*((const uint8_t *)(x) + 0) << 24 | \
((uint32_t)((uint32_t)*((const uint8_t *)(x) + 1) << 16 | \
((uint32_t)((uint32_t)*((const uint8_t *)(x) + 2) << 8 | \
(uint32_t)*((const uint8_t *)(x) + 3)))
#define kis_extractBE64(x) \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 0) << 56 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 1) << 48 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 2) << 40 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 3) << 32 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 4) << 24 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 5) << 16 | \
((uint64_t)((uint64_t)*((const uint8_t *)(x) + 6) << 8 | \
(uint64_t)*((const uint8_t *)(x) + 7)))
#endif