src/portable_endian.h

   1 /*
   2  * Public domain, stripped down version of:
   3  * https://gist.github.com/panzi/6856583
   4  */
   5
   6 #ifndef __PORTABLE_ENDIAN_H
   7 #define __PORTABLE_ENDIAN_H
   8
   9 #if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
  10
  11 #       define __WINDOWS__
  12
  13 #endif
  14
  15 #if defined(__linux__) || defined(__CYGWIN__)
  16
  17 #       include <endian.h>
  18
  19 #elif defined(__APPLE__)
  20
  21 #       include <libkern/OSByteOrder.h>
  22
  23 #       define htole32(x) OSSwapHostToLittleInt32(x)
  24 #       define le32toh(x) OSSwapLittleToHostInt32(x)
  25
  26 #elif defined(__OpenBSD__)
  27
  28 #       include <sys/endian.h>
  29
  30 #elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
  31
  32 #       include <sys/endian.h>
  33
  34 #       define le32toh(x) letoh32(x)
  35
  36 #elif defined(__WINDOWS__)
  37
  38 #       include <winsock2.h>
  39 #       include <sys/param.h>
  40
  41 #       if BYTE_ORDER == LITTLE_ENDIAN
  42
  43 #               define htole32(x) (x)
  44 #               define le32toh(x) (x)
  45
  46 #       elif BYTE_ORDER == BIG_ENDIAN
  47
  48                 /* that would be xbox 360 */
  49
  50 #               define htole32(x) __builtin_bswap32(x)
  51 #               define le32toh(x) __builtin_bswap32(x)
  52
  53 #       else
  54
  55 #               error byte order not supported
  56
  57 #       endif
  58
  59 #else
  60
  61 #error platform not supported
  62
  63 #endif
  64
  65 #endif /* __PORTABLE_ENDIAN_H */