src/compat/endian.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2012 (c) Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * endian.h compatibility layer.
   7  */
   8
   9 #ifndef _BABELTRACE_ENDIAN_H
  10 #define _BABELTRACE_ENDIAN_H
  11
  12 #ifdef __FreeBSD__
  13 #include <machine/endian.h>
  14
  15 #elif defined(__sun__)
  16 #include <sys/byteorder.h>
  17
  18 #ifndef __BIG_ENDIAN
  19 #define __BIG_ENDIAN 4321
  20 #endif
  21 #ifndef __LITTLE_ENDIAN
  22 #define __LITTLE_ENDIAN 1234
  23 #endif
  24
  25 #ifdef _LITTLE_ENDIAN
  26 #define __BYTE_ORDER __LITTLE_ENDIAN
  27 #endif
  28
  29 #ifdef _BIG_ENDIAN
  30 #define __BYTE_ORDER __BIG_ENDIAN
  31 #endif
  32
  33 #define LITTLE_ENDIAN  __LITTLE_ENDIAN
  34 #define BIG_ENDIAN     __BIG_ENDIAN
  35 #define BYTE_ORDER     __BYTE_ORDER
  36
  37 #define betoh16(x) BE_16(x)
  38 #define letoh16(x) LE_16(x)
  39 #define betoh32(x) BE_32(x)
  40 #define letoh32(x) LE_32(x)
  41 #define betoh64(x) BE_64(x)
  42 #define letoh64(x) LE_64(x)
  43 #define htobe16(x) BE_16(x)
  44 #define be16toh(x) BE_16(x)
  45 #define htobe32(x) BE_32(x)
  46 #define be32toh(x) BE_32(x)
  47 #define htobe64(x) BE_64(x)
  48 #define be64toh(x) BE_64(x)
  49
  50 #elif defined(__MINGW32__)
  51 #include <stdint.h>
  52
  53 #ifndef __BIG_ENDIAN
  54 #define __BIG_ENDIAN 4321
  55 #endif
  56 #ifndef __LITTLE_ENDIAN
  57 #define __LITTLE_ENDIAN 1234
  58 #endif
  59
  60 #ifndef __BYTE_ORDER
  61 #define __BYTE_ORDER __LITTLE_ENDIAN
  62 #endif
  63
  64 #define LITTLE_ENDIAN  __LITTLE_ENDIAN
  65 #define BIG_ENDIAN     __BIG_ENDIAN
  66 #define PDP_ENDIAN     __PDP_ENDIAN
  67 #define BYTE_ORDER     __BYTE_ORDER
  68
  69 #define htobe16(x) (uint16_t) _byteswap_ushort(x)
  70 #define htole16(x) (x)
  71 #define be16toh(x) (uint16_t) _byteswap_ushort(x)
  72 #define le16toh(x) (x)
  73
  74 #define htobe32(x) (uint32_t) _byteswap_ulong(x)
  75 #define htole32(x) (x)
  76 #define be32toh(x) (uint32_t) _byteswap_ulong(x)
  77 #define le32toh(x) (x)
  78
  79 #define htobe64(x) (uint64_t) _byteswap_uint64(x)
  80 #define htole64(x) (x)
  81 #define be64toh(x) (uint64_t) _byteswap_uint64(x)
  82 #define le64toh(x) (x)
  83
  84 #elif defined(__APPLE__)
  85 # include <machine/endian.h>
  86 # include <libkern/OSByteOrder.h>
  87
  88 # if BYTE_ORDER == LITTLE_ENDIAN
  89 #  define htobe16(x) OSSwapConstInt16(x)
  90 #  define htole16(x) (x)
  91 #  define be16toh(x) OSSwapConstInt16(x)
  92 #  define le16toh(x) (x)
  93
  94 #  define htobe32(x) OSSwapConstInt32(x)
  95 #  define htole32(x) (x)
  96 #  define be32toh(x) OSSwapConstInt32(x)
  97 #  define le32toh(x) (x)
  98
  99 #  define htobe64(x) OSSwapConstInt64(x)
 100 #  define htole64(x) (x)
 101 #  define be64toh(x) OSSwapConstInt64(x)
 102 #  define le64toh(x) (x)
 103
 104 # else /* BYTE_ORDER == LITTLE_ENDIAN */
 105 #  define htobe16(x) (x)
 106 #  define htole16(x) OSSwapConstInt16(x)
 107 #  define be16toh(x) (x)
 108 #  define le16toh(x) OSSwapConstInt16(x)
 109
 110 #  define htobe32(x) (x)
 111 #  define htole32(x) OSSwapConstInt32(x)
 112 #  define be32toh(x) (x)
 113 #  define le32toh(x) OSSwapConstInt32(x)
 114
 115 #  define htobe64(x) (x)
 116 #  define htole64(x) OSSwapConstInt64(x)
 117 #  define be64toh(x) (x)
 118 #  define le64toh(x) OSSwapConstInt64(x)
 119 #  endif
 120
 121 #else
 122 #include <endian.h>
 123
 124 /*
 125  * htobe/betoh are not defined for glibc < 2.9, so add them explicitly
 126  * if they are missing.
 127  */
 128 # ifdef __USE_BSD
 129 /* Conversion interfaces. */
 130 #  include <byteswap.h>
 131
 132 #  if __BYTE_ORDER == __LITTLE_ENDIAN
 133 #   ifndef htobe16
 134 #    define htobe16(x) __bswap_16(x)
 135 #   endif
 136 #   ifndef htole16
 137 #    define htole16(x) (x)
 138 #   endif
 139 #   ifndef be16toh
 140 #    define be16toh(x) __bswap_16(x)
 141 #   endif
 142 #   ifndef le16toh
 143 #    define le16toh(x) (x)
 144 #   endif
 145
 146 #   ifndef htobe32
 147 #    define htobe32(x) __bswap_32(x)
 148 #   endif
 149 #   ifndef htole32
 150 #    define htole32(x) (x)
 151 #   endif
 152 #   ifndef be32toh
 153 #    define be32toh(x) __bswap_32(x)
 154 #   endif
 155 #   ifndef le32toh
 156 #    define le32toh(x) (x)
 157 #   endif
 158
 159 #   ifndef htobe64
 160 #    define htobe64(x) __bswap_64(x)
 161 #   endif
 162 #   ifndef htole64
 163 #    define htole64(x) (x)
 164 #   endif
 165 #   ifndef be64toh
 166 #    define be64toh(x) __bswap_64(x)
 167 #   endif
 168 #   ifndef le64toh
 169 #    define le64toh(x) (x)
 170 #   endif
 171
 172 #  else /* __BYTE_ORDER == __LITTLE_ENDIAN */
 173 #   ifndef htobe16
 174 #    define htobe16(x) (x)
 175 #   endif
 176 #   ifndef htole16
 177 #    define htole16(x) __bswap_16(x)
 178 #   endif
 179 #   ifndef be16toh
 180 #    define be16toh(x) (x)
 181 #   endif
 182 #   ifndef le16toh
 183 #    define le16toh(x) __bswap_16(x)
 184 #   endif
 185
 186 #   ifndef htobe32
 187 #    define htobe32(x) (x)
 188 #   endif
 189 #   ifndef htole32
 190 #    define htole32(x) __bswap_32(x)
 191 #   endif
 192 #   ifndef be32toh
 193 #    define be32toh(x) (x)
 194 #   endif
 195 #   ifndef le32toh
 196 #    define le32toh(x) __bswap_32(x)
 197 #   endif
 198
 199 #   ifndef htobe64
 200 #    define htobe64(x) (x)
 201 #   endif
 202 #   ifndef htole64
 203 #    define htole64(x) __bswap_64(x)
 204 #   endif
 205 #   ifndef be64toh
 206 #    define be64toh(x) (x)
 207 #   endif
 208 #   ifndef le64toh
 209 #    define le64toh(x) __bswap_64(x)
 210 #   endif
 211
 212 #  endif /* __BYTE_ORDER == __LITTLE_ENDIAN */
 213 # endif /* __USE_BSD */
 214 #endif /* else -- __FreeBSD__ */
 215
 216 #ifndef FLOAT_WORD_ORDER
 217 #ifdef __FLOAT_WORD_ORDER
 218 #define FLOAT_WORD_ORDER        __FLOAT_WORD_ORDER
 219 #else /* __FLOAT_WORD_ORDER */
 220 #define FLOAT_WORD_ORDER        BYTE_ORDER
 221 #endif /* __FLOAT_WORD_ORDER */
 222 #endif /* FLOAT_WORD_ORDER */
 223
 224 #endif /* _BABELTRACE_ENDIAN_H */