src/common/compat/endian.h

   1 /*
   2  * Copyright (C) 2011 David Goulet <dgoulet@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #ifndef _COMPAT_ENDIAN_H
   9 #define _COMPAT_ENDIAN_H
  10
  11 #if defined(__linux__) || defined(__CYGWIN__)
  12 #include <endian.h>
  13
  14 /*
  15  * htobe/betoh are not defined for glibc <2.9, so add them
  16  * explicitly if they are missing.
  17  */
  18 #ifdef __USE_BSD
  19 /* Conversion interfaces. */
  20 # include <byteswap.h>
  21
  22 # if __BYTE_ORDER == __LITTLE_ENDIAN
  23 #  ifndef htobe16
  24 #   define htobe16(x) __bswap_16(x)
  25 #  endif
  26 #  ifndef htole16
  27 #   define htole16(x) (x)
  28 #  endif
  29 #  ifndef be16toh
  30 #   define be16toh(x) __bswap_16(x)
  31 #  endif
  32 #  ifndef le16toh
  33 #   define le16toh(x) (x)
  34 #  endif
  35
  36 #  ifndef htobe32
  37 #   define htobe32(x) __bswap_32(x)
  38 #  endif
  39 #  ifndef htole32
  40 #   define htole32(x) (x)
  41 #  endif
  42 #  ifndef be32toh
  43 #   define be32toh(x) __bswap_32(x)
  44 #  endif
  45 #  ifndef le32toh
  46 #   define le32toh(x) (x)
  47 #  endif
  48
  49 #  ifndef htobe64
  50 #   define htobe64(x) __bswap_64(x)
  51 #  endif
  52 #  ifndef htole64
  53 #   define htole64(x) (x)
  54 #  endif
  55 #  ifndef be64toh
  56 #   define be64toh(x) __bswap_64(x)
  57 #  endif
  58 #  ifndef le64toh
  59 #   define le64toh(x) (x)
  60 #  endif
  61
  62 # else /* __BYTE_ORDER == __LITTLE_ENDIAN */
  63 #  ifndef htobe16
  64 #   define htobe16(x) (x)
  65 #  endif
  66 #  ifndef htole16
  67 #   define htole16(x) __bswap_16(x)
  68 #  endif
  69 #  ifndef be16toh
  70 #   define be16toh(x) (x)
  71 #  endif
  72 #  ifndef le16toh
  73 #   define le16toh(x) __bswap_16(x)
  74 #  endif
  75
  76 #  ifndef htobe32
  77 #   define htobe32(x) (x)
  78 #  endif
  79 #  ifndef htole32
  80 #   define htole32(x) __bswap_32(x)
  81 #  endif
  82 #  ifndef be32toh
  83 #   define be32toh(x) (x)
  84 #  endif
  85 #  ifndef le32toh
  86 #   define le32toh(x) __bswap_32(x)
  87 #  endif
  88
  89 #  ifndef htobe64
  90 #   define htobe64(x) (x)
  91 #  endif
  92 #  ifndef htole64
  93 #   define htole64(x) __bswap_64(x)
  94 #  endif
  95 #  ifndef be64toh
  96 #   define be64toh(x) (x)
  97 #  endif
  98 #  ifndef le64toh
  99 #   define le64toh(x) __bswap_64(x)
 100 #  endif
 101
 102 # endif /* __BYTE_ORDER == __LITTLE_ENDIAN */
 103 #endif /* __USE_BSD */
 104
 105 #elif defined(__FreeBSD__)
 106 #include <machine/endian.h>
 107
 108 #elif defined(__sun__)
 109 #include <sys/byteorder.h>
 110 #ifndef __BIG_ENDIAN
 111 #define __BIG_ENDIAN 4321
 112 #endif /* __BIG_ENDIAN */
 113 #ifndef __LITTLE_ENDIAN
 114 #define __LITTLE_ENDIAN 1234
 115 #endif /* __LITTLE_ENDIAN */
 116
 117 #ifdef _LITTLE_ENDIAN
 118 #define __BYTE_ORDER __LITTLE_ENDIAN
 119 #endif /* _LITTLE_ENDIAN */
 120 #ifdef _BIG_ENDIAN
 121 #define __BYTE_ORDER __BIG_ENDIAN
 122 #endif /* _BIG_ENDIAN */
 123
 124 #define LITTLE_ENDIAN  __LITTLE_ENDIAN
 125 #define BIG_ENDIAN     __BIG_ENDIAN
 126 #define PDP_ENDIAN     __PDP_ENDIAN
 127 #define BYTE_ORDER     __BYTE_ORDER
 128
 129 #define betoh16(x) BE_16(x)
 130 #define letoh16(x) LE_16(x)
 131 #define betoh32(x) BE_32(x)
 132 #define letoh32(x) LE_32(x)
 133 #define betoh64(x) BE_64(x)
 134 #define letoh64(x) LE_64(x)
 135 #define htobe16(x) BE_16(x)
 136 #define be16toh(x) BE_16(x)
 137 #define htobe32(x) BE_32(x)
 138 #define be32toh(x) BE_32(x)
 139 #define htobe64(x) BE_64(x)
 140 #define be64toh(x) BE_64(x)
 141
 142 #elif defined(__APPLE__)
 143 # include <machine/endian.h>
 144 # include <libkern/OSByteOrder.h>
 145
 146 # if BYTE_ORDER == LITTLE_ENDIAN
 147 #  define htobe16(x) OSSwapConstInt16(x)
 148 #  define htole16(x) (x)
 149 #  define be16toh(x) OSSwapConstInt16(x)
 150 #  define le16toh(x) (x)
 151
 152 #  define htobe32(x) OSSwapConstInt32(x)
 153 #  define htole32(x) (x)
 154 #  define be32toh(x) OSSwapConstInt32(x)
 155 #  define le32toh(x) (x)
 156
 157 #  define htobe64(x) OSSwapConstInt64(x)
 158 #  define htole64(x) (x)
 159 #  define be64toh(x) OSSwapConstInt64(x)
 160 #  define le64toh(x) (x)
 161
 162 # else /* BYTE_ORDER == LITTLE_ENDIAN */
 163 #  define htobe16(x) (x)
 164 #  define htole16(x) OSSwapConstInt16(x)
 165 #  define be16toh(x) (x)
 166 #  define le16toh(x) OSSwapConstInt16(x)
 167
 168 #  define htobe32(x) (x)
 169 #  define htole32(x) OSSwapConstInt32(x)
 170 #  define be32toh(x) (x)
 171 #  define le32toh(x) OSSwapConstInt32(x)
 172
 173 #  define htobe64(x) (x)
 174 #  define htole64(x) OSSwapConstInt64(x)
 175 #  define be64toh(x) (x)
 176 #  define le64toh(x) OSSwapConstInt64(x)
 177 # endif
 178
 179 #else
 180 #error "Please add support for your OS."
 181 #endif
 182
 183 #endif /* _COMPAT_ENDIAN_H */