src/common/compat/endian.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <dgoulet@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License, version 2 only,
   6  * as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #ifndef _COMPAT_ENDIAN_H
  19 #define _COMPAT_ENDIAN_H
  20
  21 #ifdef __linux__
  22 #include <endian.h>
  23
  24 /*
  25  * htobe/betoh are not defined for glibc <2.9, so add them
  26  * explicitly if they are missing.
  27  */
  28 #ifdef __USE_BSD
  29 /* Conversion interfaces. */
  30 # include <byteswap.h>
  31
  32 # if __BYTE_ORDER == __LITTLE_ENDIAN
  33 #  ifndef htobe16
  34 #   define htobe16(x) __bswap_16(x)
  35 #  endif
  36 #  ifndef htole16
  37 #   define htole16(x) (x)
  38 #  endif
  39 #  ifndef be16toh
  40 #   define be16toh(x) __bswap_16(x)
  41 #  endif
  42 #  ifndef le16toh
  43 #   define le16toh(x) (x)
  44 #  endif
  45
  46 #  ifndef htobe32
  47 #   define htobe32(x) __bswap_32(x)
  48 #  endif
  49 #  ifndef htole32
  50 #   define htole32(x) (x)
  51 #  endif
  52 #  ifndef be32toh
  53 #   define be32toh(x) __bswap_32(x)
  54 #  endif
  55 #  ifndef le32toh
  56 #   define le32toh(x) (x)
  57 #  endif
  58
  59 #  ifndef htobe64
  60 #   define htobe64(x) __bswap_64(x)
  61 #  endif
  62 #  ifndef htole64
  63 #   define htole64(x) (x)
  64 #  endif
  65 #  ifndef be64toh
  66 #   define be64toh(x) __bswap_64(x)
  67 #  endif
  68 #  ifndef le64toh
  69 #   define le64toh(x) (x)
  70 #  endif
  71
  72 # else /* __BYTE_ORDER == __LITTLE_ENDIAN */
  73 #  ifndef htobe16
  74 #   define htobe16(x) (x)
  75 #  endif
  76 #  ifndef htole16
  77 #   define htole16(x) __bswap_16(x)
  78 #  endif
  79 #  ifndef be16toh
  80 #   define be16toh(x) (x)
  81 #  endif
  82 #  ifndef le16toh
  83 #   define le16toh(x) __bswap_16(x)
  84 #  endif
  85
  86 #  ifndef htobe32
  87 #   define htobe32(x) (x)
  88 #  endif
  89 #  ifndef htole32
  90 #   define htole32(x) __bswap_32(x)
  91 #  endif
  92 #  ifndef be32toh
  93 #   define be32toh(x) (x)
  94 #  endif
  95 #  ifndef le32toh
  96 #   define le32toh(x) __bswap_32(x)
  97 #  endif
  98
  99 #  ifndef htobe64
 100 #   define htobe64(x) (x)
 101 #  endif
 102 #  ifndef htole64
 103 #   define htole64(x) __bswap_64(x)
 104 #  endif
 105 #  ifndef be64toh
 106 #   define be64toh(x) (x)
 107 #  endif
 108 #  ifndef le64toh
 109 #   define le64toh(x) __bswap_64(x)
 110 #  endif
 111
 112 # endif /* __BYTE_ORDER == __LITTLE_ENDIAN */
 113 #endif /* __USE_BSD */
 114
 115 #elif defined(__FreeBSD__)
 116 #include <machine/endian.h>
 117
 118 #elif defined(__sun__)
 119 #include <sys/byteorder.h>
 120 #ifndef __BIG_ENDIAN
 121 #define __BIG_ENDIAN 4321
 122 #endif /* __BIG_ENDIAN */
 123 #ifndef __LITTLE_ENDIAN
 124 #define __LITTLE_ENDIAN 1234
 125 #endif /* __LITTLE_ENDIAN */
 126
 127 #ifdef _LITTLE_ENDIAN
 128 #define __BYTE_ORDER __LITTLE_ENDIAN
 129 #endif /* _LITTLE_ENDIAN */
 130 #ifdef _BIG_ENDIAN
 131 #define __BYTE_ORDER __BIG_ENDIAN
 132 #endif /* _BIG_ENDIAN */
 133
 134 #define LITTLE_ENDIAN  __LITTLE_ENDIAN
 135 #define BIG_ENDIAN     __BIG_ENDIAN
 136 #define PDP_ENDIAN     __PDP_ENDIAN
 137 #define BYTE_ORDER     __BYTE_ORDER
 138
 139 #define betoh16(x) BE_16(x)
 140 #define letoh16(x) LE_16(x)
 141 #define betoh32(x) BE_32(x)
 142 #define letoh32(x) LE_32(x)
 143 #define betoh64(x) BE_64(x)
 144 #define letoh64(x) LE_64(x)
 145 #define htobe16(x) BE_16(x)
 146 #define be16toh(x) BE_16(x)
 147 #define htobe32(x) BE_32(x)
 148 #define be32toh(x) BE_32(x)
 149 #define htobe64(x) BE_64(x)
 150 #define be64toh(x) BE_64(x)
 151
 152 #else
 153 #error "Please add support for your OS."
 154 #endif
 155
 156 #endif /* _COMPAT_ENDIAN_H */