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      1 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
      2 /* byteswap.h - Byte swapping
      3    Copyright (C) 2005 Free Software Foundation, Inc.
      4    Written by Oskar Liljeblad <oskar (at) osk.mine.nu>, 2005.
      5 
      6    This program is free software; you can redistribute it and/or modify
      7    it under the terms of the GNU General Public License as published by
      8    the Free Software Foundation; either version 2, or (at your option)
      9    any later version.
     10 
     11    This program is distributed in the hope that it will be useful,
     12    but WITHOUT ANY WARRANTY; without even the implied warranty of
     13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14    GNU General Public License for more details.
     15 
     16    You should have received a copy of the GNU General Public License
     17    along with this program; if not, write to the Free Software Foundation,
     18    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
     19 
     20 #ifndef _BYTESWAP_H
     21 
     22 #include <sys/endian.h>
     23 #if _BYTE_ORDER == _LITTLE_ENDIAN
     24 /* Given an unsigned 16-bit argument X, return the value corresponding to
     25    X with reversed byte order.  */
     26 #define bswap_16(x) ((((x) & 0x00FF) << 8) | \
     27 		     (((x) & 0xFF00) >> 8))
     28 
     29 /* Given an unsigned 32-bit argument X, return the value corresponding to
     30    X with reversed byte order.  */
     31 #define bswap_32(x) ((((x) & 0x000000FF) << 24) | \
     32 		     (((x) & 0x0000FF00) << 8) | \
     33 		     (((x) & 0x00FF0000) << 8) | \
     34 		     (((x) & 0xFF000000) >> 24))
     35 
     36 /* Given an unsigned 64-bit argument X, return the value corresponding to
     37    X with reversed byte order.  */
     38 #define bswap_64(x) ((((x) & 0x00000000000000FFULL) << 56) | \
     39 		     (((x) & 0x000000000000FF00ULL) << 40) | \
     40 		     (((x) & 0x0000000000FF0000ULL) << 24) | \
     41 		     (((x) & 0x00000000FF000000ULL) << 8) | \
     42 		     (((x) & 0x000000FF00000000ULL) >> 8) | \
     43 		     (((x) & 0x0000FF0000000000ULL) >> 24) | \
     44 		     (((x) & 0x00FF000000000000ULL) >> 40) | \
     45 		     (((x) & 0xFF00000000000000ULL) >> 56))
     46 #else
     47 #define bswap_16(x) (x)
     48 #define bswap_32(x) (x)
     49 #define bswap_64(x) (x)
     50 #endif
     51 
     52 #endif
     53