src/sys-endian.h

   1 #ifndef LI_SYS_ENDIAN_H
   2 #define LI_SYS_ENDIAN_H
   3 #include "first.h"
   4
   5
   6 #if !defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)
   7
   8
   9 /* copied from of plasma_endian.h
  10  * https://github.com/gstrauss/plasma/blob/master/plasma_endian.h
  11  * (used with permission from the author (gstrauss)) */
  12 #if defined(__BYTE_ORDER__)              \
  13  && (   defined(__ORDER_LITTLE_ENDIAN__) \
  14      || defined(__ORDER_BIG_ENDIAN__)    \
  15      || defined(__ORDER_PDP_ENDIAN__)   )
  16   #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  17   #define __LITTLE_ENDIAN__ 1
  18   #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  19   #define __BIG_ENDIAN__ 1
  20   #endif
  21 #elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
  22   #define __LITTLE_ENDIAN__ 1
  23 #elif !defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN)
  24   #define __BIG_ENDIAN__ 1
  25 #elif defined(_WIN32) /* little endian on all current MS-supported platforms */
  26   #define __LITTLE_ENDIAN__ 1
  27 #elif defined(__GLIBC__) || defined(__linux__)
  28   #include <endian.h>
  29   #if __BYTE_ORDER == __LITTLE_ENDIAN
  30   #define __LITTLE_ENDIAN__ 1
  31   #elif __BYTE_ORDER == __BIG_ENDIAN
  32   #define __BIG_ENDIAN__ 1
  33   #endif
  34 #elif defined(__sun__) && defined(__SVR4)
  35   #include <sys/isa_defs.h>
  36   #if defined(_LITTLE_ENDIAN)
  37   #define __LITTLE_ENDIAN__ 1
  38   #elif defined(_BIG_ENDIAN)
  39   #define __BIG_ENDIAN__ 1
  40   #endif
  41 #elif defined(_AIX)
  42   #include <sys/machine.h>
  43   #if BYTE_ORDER == LITTLE_ENDIAN
  44   #define __LITTLE_ENDIAN__ 1
  45   #elif BYTE_ORDER == BIG_ENDIAN
  46   #define __BIG_ENDIAN__ 1
  47   #endif
  48 #elif defined(__APPLE__) && defined(__MACH__)
  49   #include <machine/endian.h>
  50   #if BYTE_ORDER == LITTLE_ENDIAN
  51   #define __LITTLE_ENDIAN__ 1
  52   #elif BYTE_ORDER == BIG_ENDIAN
  53   #define __BIG_ENDIAN__ 1
  54   #endif
  55 #elif defined(__FreeBSD__) || defined(__NetBSD__) \
  56    || defined(__OpenBSD__) || defined(__DragonFly__)
  57   #include <machine/endian.h>
  58   #if _BYTE_ORDER == _LITTLE_ENDIAN
  59   #define __LITTLE_ENDIAN__ 1
  60   #elif _BYTE_ORDER == _BIG_ENDIAN
  61   #define __BIG_ENDIAN__ 1
  62   #endif
  63 #else /*(else assume little endian)*/
  64   #define __LITTLE_ENDIAN__ 1
  65 #endif
  66
  67
  68 #endif /* !defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__) */
  69
  70
  71 #endif