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 #include <byteswap.h>
  14
  15 /*
  16  * htobe/betoh are not defined for glibc <2.9, so add them
  17  * explicitly if they are missing.
  18  */
  19 #ifdef __USE_BSD
  20 /* Conversion interfaces. */
  21 # include <byteswap.h>
  22
  23 # if __BYTE_ORDER == __LITTLE_ENDIAN
  24 #  ifndef htobe16
  25 #   define htobe16(x) __bswap_16(x)
  26 #  endif
  27 #  ifndef htole16
  28 #   define htole16(x) (x)
  29 #  endif
  30 #  ifndef be16toh
  31 #   define be16toh(x) __bswap_16(x)
  32 #  endif
  33 #  ifndef le16toh
  34 #   define le16toh(x) (x)
  35 #  endif
  36
  37 #  ifndef htobe32
  38 #   define htobe32(x) __bswap_32(x)
  39 #  endif
  40 #  ifndef htole32
  41 #   define htole32(x) (x)
  42 #  endif
  43 #  ifndef be32toh
  44 #   define be32toh(x) __bswap_32(x)
  45 #  endif
  46 #  ifndef le32toh
  47 #   define le32toh(x) (x)
  48 #  endif
  49
  50 #  ifndef htobe64
  51 #   define htobe64(x) __bswap_64(x)
  52 #  endif
  53 #  ifndef htole64
  54 #   define htole64(x) (x)
  55 #  endif
  56 #  ifndef be64toh
  57 #   define be64toh(x) __bswap_64(x)
  58 #  endif
  59 #  ifndef le64toh
  60 #   define le64toh(x) (x)
  61 #  endif
  62
  63 # else /* __BYTE_ORDER == __LITTLE_ENDIAN */
  64 #  ifndef htobe16
  65 #   define htobe16(x) (x)
  66 #  endif
  67 #  ifndef htole16
  68 #   define htole16(x) __bswap_16(x)
  69 #  endif
  70 #  ifndef be16toh
  71 #   define be16toh(x) (x)
  72 #  endif
  73 #  ifndef le16toh
  74 #   define le16toh(x) __bswap_16(x)
  75 #  endif
  76
  77 #  ifndef htobe32
  78 #   define htobe32(x) (x)
  79 #  endif
  80 #  ifndef htole32
  81 #   define htole32(x) __bswap_32(x)
  82 #  endif
  83 #  ifndef be32toh
  84 #   define be32toh(x) (x)
  85 #  endif
  86 #  ifndef le32toh
  87 #   define le32toh(x) __bswap_32(x)
  88 #  endif
  89
  90 #  ifndef htobe64
  91 #   define htobe64(x) (x)
  92 #  endif
  93 #  ifndef htole64
  94 #   define htole64(x) __bswap_64(x)
  95 #  endif
  96 #  ifndef be64toh
  97 #   define be64toh(x) (x)
  98 #  endif
  99 #  ifndef le64toh
 100 #   define le64toh(x) __bswap_64(x)
 101 #  endif
 102
 103 # endif /* __BYTE_ORDER == __LITTLE_ENDIAN */
 104 #endif /* __USE_BSD */
 105
 106 #elif defined(__FreeBSD__)
 107 #include <sys/endian.h>
 108
 109 #define bswap_16(x)     bswap16(x)
 110 #define bswap_32(x)     bswap32(x)
 111 #define bswap_64(x)     bswap64(x)
 112
 113 #elif defined(__sun__)
 114 #include <sys/byteorder.h>
 115 #ifndef __BIG_ENDIAN
 116 #define __BIG_ENDIAN 4321
 117 #endif /* __BIG_ENDIAN */
 118 #ifndef __LITTLE_ENDIAN
 119 #define __LITTLE_ENDIAN 1234
 120 #endif /* __LITTLE_ENDIAN */
 121
 122 #ifdef _LITTLE_ENDIAN
 123 #define __BYTE_ORDER __LITTLE_ENDIAN
 124 #endif /* _LITTLE_ENDIAN */
 125 #ifdef _BIG_ENDIAN
 126 #define __BYTE_ORDER __BIG_ENDIAN
 127 #endif /* _BIG_ENDIAN */
 128
 129 #define LITTLE_ENDIAN  __LITTLE_ENDIAN
 130 #define BIG_ENDIAN     __BIG_ENDIAN
 131 #define PDP_ENDIAN     __PDP_ENDIAN
 132 #define BYTE_ORDER     __BYTE_ORDER
 133
 134 #define betoh16(x) BE_16(x)
 135 #define letoh16(x) LE_16(x)
 136 #define betoh32(x) BE_32(x)
 137 #define letoh32(x) LE_32(x)
 138 #define betoh64(x) BE_64(x)
 139 #define letoh64(x) LE_64(x)
 140 #define htobe16(x) BE_16(x)
 141 #define be16toh(x) BE_16(x)
 142 #define htobe32(x) BE_32(x)
 143 #define be32toh(x) BE_32(x)
 144 #define htobe64(x) BE_64(x)
 145 #define be64toh(x) BE_64(x)
 146
 147 #elif defined(__APPLE__)
 148 # include <machine/endian.h>
 149 # include <libkern/OSByteOrder.h>
 150
 151 # if BYTE_ORDER == LITTLE_ENDIAN
 152 #  define htobe16(x) OSSwapConstInt16(x)
 153 #  define htole16(x) (x)
 154 #  define be16toh(x) OSSwapConstInt16(x)
 155 #  define le16toh(x) (x)
 156
 157 #  define htobe32(x) OSSwapConstInt32(x)
 158 #  define htole32(x) (x)
 159 #  define be32toh(x) OSSwapConstInt32(x)
 160 #  define le32toh(x) (x)
 161
 162 #  define htobe64(x) OSSwapConstInt64(x)
 163 #  define htole64(x) (x)
 164 #  define be64toh(x) OSSwapConstInt64(x)
 165 #  define le64toh(x) (x)
 166
 167 # else /* BYTE_ORDER == LITTLE_ENDIAN */
 168 #  define htobe16(x) (x)
 169 #  define htole16(x) OSSwapConstInt16(x)
 170 #  define be16toh(x) (x)
 171 #  define le16toh(x) OSSwapConstInt16(x)
 172
 173 #  define htobe32(x) (x)
 174 #  define htole32(x) OSSwapConstInt32(x)
 175 #  define be32toh(x) (x)
 176 #  define le32toh(x) OSSwapConstInt32(x)
 177
 178 #  define htobe64(x) (x)
 179 #  define htole64(x) OSSwapConstInt64(x)
 180 #  define be64toh(x) (x)
 181 #  define le64toh(x) OSSwapConstInt64(x)
 182 # endif
 183
 184 #else
 185 #error "Please add support for your OS."
 186 #endif
 187
 188 #endif /* _COMPAT_ENDIAN_H */