src/util/u_endian.h

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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 #if __BYTE_ORDER == __LITTLE_ENDIAN
  34 # define UTIL_ARCH_LITTLE_ENDIAN 1
  35 # define UTIL_ARCH_BIG_ENDIAN 0
  36 #elif __BYTE_ORDER == __BIG_ENDIAN
  37 # define UTIL_ARCH_LITTLE_ENDIAN 0
  38 # define UTIL_ARCH_BIG_ENDIAN 1
  39 #endif
  40
  41 #elif defined(__APPLE__)
  42 #include <machine/endian.h>
  43
  44 #if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
  45 # define UTIL_ARCH_LITTLE_ENDIAN 1
  46 # define UTIL_ARCH_BIG_ENDIAN 0
  47 #elif __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
  48 # define UTIL_ARCH_LITTLE_ENDIAN 0
  49 # define UTIL_ARCH_BIG_ENDIAN 1
  50 #endif
  51
  52 #elif defined(__sun)
  53 #include <sys/isa_defs.h>
  54
  55 #if defined(_LITTLE_ENDIAN)
  56 # define UTIL_ARCH_LITTLE_ENDIAN 1
  57 # define UTIL_ARCH_BIG_ENDIAN 0
  58 #elif defined(_BIG_ENDIAN)
  59 # define UTIL_ARCH_LITTLE_ENDIAN 0
  60 # define UTIL_ARCH_BIG_ENDIAN 1
  61 #endif
  62
  63 #elif defined(__OpenBSD__) || defined(__NetBSD__) || \
  64       defined(__FreeBSD__) || defined(__DragonFly__)
  65 #include <sys/types.h>
  66 #include <machine/endian.h>
  67
  68 #if _BYTE_ORDER == _LITTLE_ENDIAN
  69 # define UTIL_ARCH_LITTLE_ENDIAN 1
  70 # define UTIL_ARCH_BIG_ENDIAN 0
  71 #elif _BYTE_ORDER == _BIG_ENDIAN
  72 # define UTIL_ARCH_LITTLE_ENDIAN 0
  73 # define UTIL_ARCH_BIG_ENDIAN 1
  74 #endif
  75
  76 #elif defined(_WIN32) || defined(ANDROID)
  77
  78 #define UTIL_ARCH_LITTLE_ENDIAN 1
  79 #define UTIL_ARCH_BIG_ENDIAN 0
  80
  81 #endif
  82
  83 #if !defined(UTIL_ARCH_LITTLE_ENDIAN) || !defined(UTIL_ARCH_BIG_ENDIAN)
  84 # error "UTIL_ARCH_LITTLE_ENDIAN and/or UTIL_ARCH_BIG_ENDIAN were unset."
  85 #elif UTIL_ARCH_LITTLE_ENDIAN == UTIL_ARCH_BIG_ENDIAN
  86 # error "UTIL_ARCH_LITTLE_ENDIAN and UTIL_ARCH_BIG_ENDIAN must not both be 1 or 0."
  87 #endif
  88
  89 #endif