src/util/u_endian.h

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  16  * of the Software.
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  27 #ifndef U_ENDIAN_H
  28 #define U_ENDIAN_H
  29
  30 #ifdef HAVE_ENDIAN_H
  31 #include <endian.h>
  32
  33 /* glibc */
  34 #if defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN)
  35 # define UTIL_ARCH_LITTLE_ENDIAN 1
  36 # define UTIL_ARCH_BIG_ENDIAN 0
  37 #elif defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)
  38 # define UTIL_ARCH_LITTLE_ENDIAN 0
  39 # define UTIL_ARCH_BIG_ENDIAN 1
  40 #endif
  41
  42 #if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
  43 # define UTIL_ARCH_LITTLE_ENDIAN 1
  44 # define UTIL_ARCH_BIG_ENDIAN 0
  45 #elif defined(BYTE_ORDER) && (BYTE_ORDER == BIG_ENDIAN)
  46 # define UTIL_ARCH_LITTLE_ENDIAN 0
  47 # define UTIL_ARCH_BIG_ENDIAN 1
  48 #endif
  49
  50 #elif defined(__APPLE__)
  51 #include <machine/endian.h>
  52
  53 #if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
  54 # define UTIL_ARCH_LITTLE_ENDIAN 1
  55 # define UTIL_ARCH_BIG_ENDIAN 0
  56 #elif __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
  57 # define UTIL_ARCH_LITTLE_ENDIAN 0
  58 # define UTIL_ARCH_BIG_ENDIAN 1
  59 #endif
  60
  61 #elif defined(__sun)
  62 #include <sys/isa_defs.h>
  63
  64 #if defined(_LITTLE_ENDIAN)
  65 # define UTIL_ARCH_LITTLE_ENDIAN 1
  66 # define UTIL_ARCH_BIG_ENDIAN 0
  67 #elif defined(_BIG_ENDIAN)
  68 # define UTIL_ARCH_LITTLE_ENDIAN 0
  69 # define UTIL_ARCH_BIG_ENDIAN 1
  70 #endif
  71
  72 #elif defined(__NetBSD__) || defined(__FreeBSD__) || \
  73       defined(__DragonFly__)
  74 #include <sys/types.h>
  75 #include <machine/endian.h>
  76
  77 #if _BYTE_ORDER == _LITTLE_ENDIAN
  78 # define UTIL_ARCH_LITTLE_ENDIAN 1
  79 # define UTIL_ARCH_BIG_ENDIAN 0
  80 #elif _BYTE_ORDER == _BIG_ENDIAN
  81 # define UTIL_ARCH_LITTLE_ENDIAN 0
  82 # define UTIL_ARCH_BIG_ENDIAN 1
  83 #endif
  84
  85 #elif defined(_WIN32) || defined(ANDROID)
  86
  87 #define UTIL_ARCH_LITTLE_ENDIAN 1
  88 #define UTIL_ARCH_BIG_ENDIAN 0
  89
  90 #endif
  91
  92 #if !defined(UTIL_ARCH_LITTLE_ENDIAN) || !defined(UTIL_ARCH_BIG_ENDIAN)
  93 # error "UTIL_ARCH_LITTLE_ENDIAN and/or UTIL_ARCH_BIG_ENDIAN were unset."
  94 #elif UTIL_ARCH_LITTLE_ENDIAN == UTIL_ARCH_BIG_ENDIAN
  95 # error "UTIL_ARCH_LITTLE_ENDIAN and UTIL_ARCH_BIG_ENDIAN must not both be 1 or 0."
  96 #endif
  97
  98 #endif