swap.h

   1 /*
   2  * These are little/big endian routines for the main module of CNTLM
   3  *
   4  * CNTLM is free software; you can redistribute it and/or modify it under the
   5  * terms of the GNU General Public License as published by the Free Software
   6  * Foundation; either version 2 of the License, or (at your option) any later
   7  * version.
   8  *
   9  * CNTLM is distributed in the hope that it will be useful, but WITHOUT ANY
  10  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  11  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  12  * details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
  16  * St, Fifth Floor, Boston, MA 02110-1301, USA.
  17  *
  18  * Copyright (c) 2007 David Kubicek
  19  *
  20  */
  21
  22 #ifndef _SWAP_H
  23 #define _SWAP_H
  24
  25 #include <stdint.h>
  26
  27 #include "config/config.h"
  28
  29 #define swap16(x) \
  30         ((uint16_t)( \
  31                 (((uint16_t)(x) & (uint16_t)0x00ffU) << 8) | \
  32                 (((uint16_t)(x) & (uint16_t)0xff00U) >> 8) ))
  33
  34 #define swap32(x) \
  35         ((uint32_t)( \
  36                 (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) | \
  37                 (((uint32_t)(x) & (uint32_t)0x0000ff00UL) <<  8) | \
  38                 (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >>  8) | \
  39                 (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24) ))
  40
  41 #define swap64(x) \
  42         ((uint64_t)( \
  43                 (((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56) | \
  44                 (((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
  45                 (((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
  46                 (((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
  47                 (((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
  48                 (((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
  49                 (((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
  50                 (((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) ))
  51
  52 #if config_endian == 0
  53 # define U16LE(x)               swap16(x)
  54 # define U32LE(x)               swap32(x)
  55 # define U64LE(x)               swap64(x)
  56 # define U16BE(x)               (x)
  57 # define U32BE(x)               (x)
  58 # define U64BE(x)               (x)
  59 #else
  60 # define U16LE(x)               (x)
  61 # define U32LE(x)               (x)
  62 # define U64LE(x)               (x)
  63 # define U16BE(x)               swap16(x)
  64 # define U32BE(x)               swap32(x)
  65 # define U64BE(x)               swap64(x)
  66 #endif
  67
  68 #endif /* _SWAP_H */