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| 1 | +// "License": Public Domain |
| 2 | +// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like. |
| 3 | +// In case there are jurisdictions that don't support putting things in the public domain you can also consider it to |
| 4 | +// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it |
| 5 | +// an example on how to get the endian conversion functions on different platforms. |
| 6 | + |
| 7 | +// updates from https://github.com/mikepb/endian.h/issues/4 |
| 8 | + |
| 9 | +#ifndef ENDIAN_H |
| 10 | +#define ENDIAN_H |
| 11 | + |
| 12 | +#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__) |
| 13 | + |
| 14 | +# define __WINDOWS__ |
| 15 | + |
| 16 | +#endif |
| 17 | + |
| 18 | +#if defined(HAVE_ENDIAN_H) || \ |
| 19 | + defined(__linux__) || \ |
| 20 | + defined(__GNU__) || \ |
| 21 | + defined(__HAIKU__) || \ |
| 22 | + defined(__illumos__) || \ |
| 23 | + defined(__NetBSD__) || \ |
| 24 | + defined(__OpenBSD__) || \ |
| 25 | + defined(__CYGWIN__) || \ |
| 26 | + defined(__MSYS__) || \ |
| 27 | + defined(__EMSCRIPTEN__) || \ |
| 28 | + defined(__wasi__) || \ |
| 29 | + defined(__wasm__) |
| 30 | + |
| 31 | +#if defined(__NetBSD__) |
| 32 | +#define _NETBSD_SOURCE 1 |
| 33 | +#endif |
| 34 | + |
| 35 | +# include <endian.h> |
| 36 | + |
| 37 | +#elif defined(HAVE_SYS_ENDIAN_H) || \ |
| 38 | + defined(__FreeBSD__) || \ |
| 39 | + defined(__DragonFly__) |
| 40 | + |
| 41 | +# include <sys/endian.h> |
| 42 | + |
| 43 | +#elif defined(__APPLE__) |
| 44 | +# define __BYTE_ORDER BYTE_ORDER |
| 45 | +# define __BIG_ENDIAN BIG_ENDIAN |
| 46 | +# define __LITTLE_ENDIAN LITTLE_ENDIAN |
| 47 | +# define __PDP_ENDIAN PDP_ENDIAN |
| 48 | + |
| 49 | +# if !defined(_POSIX_C_SOURCE) |
| 50 | +# include <libkern/OSByteOrder.h> |
| 51 | + |
| 52 | +# define htobe16(x) OSSwapHostToBigInt16(x) |
| 53 | +# define htole16(x) OSSwapHostToLittleInt16(x) |
| 54 | +# define be16toh(x) OSSwapBigToHostInt16(x) |
| 55 | +# define le16toh(x) OSSwapLittleToHostInt16(x) |
| 56 | + |
| 57 | +# define htobe32(x) OSSwapHostToBigInt32(x) |
| 58 | +# define htole32(x) OSSwapHostToLittleInt32(x) |
| 59 | +# define be32toh(x) OSSwapBigToHostInt32(x) |
| 60 | +# define le32toh(x) OSSwapLittleToHostInt32(x) |
| 61 | + |
| 62 | +# define htobe64(x) OSSwapHostToBigInt64(x) |
| 63 | +# define htole64(x) OSSwapHostToLittleInt64(x) |
| 64 | +# define be64toh(x) OSSwapBigToHostInt64(x) |
| 65 | +# define le64toh(x) OSSwapLittleToHostInt64(x) |
| 66 | +# else |
| 67 | +# if BYTE_ORDER == LITTLE_ENDIAN |
| 68 | +# define htobe16(x) __builtin_bswap16(x) |
| 69 | +# define htole16(x) (x) |
| 70 | +# define be16toh(x) __builtin_bswap16(x) |
| 71 | +# define le16toh(x) (x) |
| 72 | + |
| 73 | +# define htobe32(x) __builtin_bswap32(x) |
| 74 | +# define htole32(x) (x) |
| 75 | +# define be32toh(x) __builtin_bswap32(x) |
| 76 | +# define le32toh(x) (x) |
| 77 | + |
| 78 | +# define htobe64(x) __builtin_bswap64(x) |
| 79 | +# define htole64(x) (x) |
| 80 | +# define be64toh(x) __builtin_bswap64(x) |
| 81 | +# define le64toh(x) (x) |
| 82 | +# elif BYTE_ORDER == BIG_ENDIAN |
| 83 | +# define htobe16(x) (x) |
| 84 | +# define htole16(x) __builtin_bswap16(x) |
| 85 | +# define be16toh(x) (x) |
| 86 | +# define le16toh(x) __builtin_bswap16(x) |
| 87 | + |
| 88 | +# define htobe32(x) (x) |
| 89 | +# define htole32(x) __builtin_bswap32(x) |
| 90 | +# define be32toh(x) (x) |
| 91 | +# define le32toh(x) __builtin_bswap32(x) |
| 92 | + |
| 93 | +# define htobe64(x) (x) |
| 94 | +# define htole64(x) __builtin_bswap64(x) |
| 95 | +# define be64toh(x) (x) |
| 96 | +# define le64toh(x) __builtin_bswap64(x) |
| 97 | +# else |
| 98 | +# error byte order not supported |
| 99 | +# endif |
| 100 | +# endif |
| 101 | + |
| 102 | +#elif defined(__WINDOWS__) |
| 103 | + |
| 104 | +# if defined(_MSC_VER) && !defined(__clang__) |
| 105 | +# include <stdlib.h> |
| 106 | +# define B_SWAP_16(x) _byteswap_ushort(x) |
| 107 | +# define B_SWAP_32(x) _byteswap_ulong(x) |
| 108 | +# define B_SWAP_64(x) _byteswap_uint64(x) |
| 109 | +# else |
| 110 | +# define B_SWAP_16(x) __builtin_bswap16(x) |
| 111 | +# define B_SWAP_32(x) __builtin_bswap32(x) |
| 112 | +# define B_SWAP_64(x) __builtin_bswap64(x) |
| 113 | +# endif |
| 114 | + |
| 115 | +# if defined(__MINGW32__) || defined(HAVE_SYS_PARAM_H) |
| 116 | +# include <sys/param.h> |
| 117 | +# endif |
| 118 | + |
| 119 | +# ifndef BIG_ENDIAN |
| 120 | +# ifdef __BIG_ENDIAN |
| 121 | +# define BIG_ENDIAN __BIG_ENDIAN |
| 122 | +# elif defined(__ORDER_BIG_ENDIAN__) |
| 123 | +# define BIG_ENDIAN __ORDER_BIG_ENDIAN__ |
| 124 | +# else |
| 125 | +# define BIG_ENDIAN 4321 |
| 126 | +# endif |
| 127 | +# endif |
| 128 | + |
| 129 | +# ifndef LITTLE_ENDIAN |
| 130 | +# ifdef __LITTLE_ENDIAN |
| 131 | +# define LITTLE_ENDIAN __LITTLE_ENDIAN |
| 132 | +# elif defined(__ORDER_LITTLE_ENDIAN__) |
| 133 | +# define LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__ |
| 134 | +# else |
| 135 | +# define LITTLE_ENDIAN 1234 |
| 136 | +# endif |
| 137 | +# endif |
| 138 | + |
| 139 | +# ifndef BYTE_ORDER |
| 140 | +# ifdef __BYTE_ORDER |
| 141 | +# define BYTE_ORDER __BYTE_ORDER |
| 142 | +# elif defined(__BYTE_ORDER__) |
| 143 | +# define BYTE_ORDER __BYTE_ORDER__ |
| 144 | +# else |
| 145 | + /* assume LE on Windows if nothing was defined */ |
| 146 | +# define BYTE_ORDER LITTLE_ENDIAN |
| 147 | +# endif |
| 148 | +# endif |
| 149 | + |
| 150 | +# if BYTE_ORDER == LITTLE_ENDIAN |
| 151 | + |
| 152 | +# define htobe16(x) B_SWAP_16(x) |
| 153 | +# define htole16(x) (x) |
| 154 | +# define be16toh(x) B_SWAP_16(x) |
| 155 | +# define le16toh(x) (x) |
| 156 | + |
| 157 | +# define htobe32(x) B_SWAP_32(x) |
| 158 | +# define htole32(x) (x) |
| 159 | +# define be32toh(x) B_SWAP_32(x) |
| 160 | +# define le32toh(x) (x) |
| 161 | + |
| 162 | +# define htobe64(x) B_SWAP_64(x) |
| 163 | +# define htole64(x) (x) |
| 164 | +# define be64toh(x) B_SWAP_64(x) |
| 165 | +# define le64toh(x) (x) |
| 166 | + |
| 167 | +# elif BYTE_ORDER == BIG_ENDIAN |
| 168 | + |
| 169 | +# define htobe16(x) (x) |
| 170 | +# define htole16(x) B_SWAP_16(x) |
| 171 | +# define be16toh(x) (x) |
| 172 | +# define le16toh(x) B_SWAP_16(x) |
| 173 | + |
| 174 | +# define htobe32(x) (x) |
| 175 | +# define htole32(x) B_SWAP_32(x) |
| 176 | +# define be32toh(x) (x) |
| 177 | +# define le32toh(x) B_SWAP_32(x) |
| 178 | + |
| 179 | +# define htobe64(x) (x) |
| 180 | +# define htole64(x) B_SWAP_64(x) |
| 181 | +# define be64toh(x) (x) |
| 182 | +# define le64toh(x) B_SWAP_64(x) |
| 183 | + |
| 184 | +# else |
| 185 | + |
| 186 | +# error byte order not supported |
| 187 | + |
| 188 | +# endif |
| 189 | + |
| 190 | +#elif defined(__QNXNTO__) |
| 191 | + |
| 192 | +# include <gulliver.h> |
| 193 | + |
| 194 | +# define __LITTLE_ENDIAN 1234 |
| 195 | +# define __BIG_ENDIAN 4321 |
| 196 | +# define __PDP_ENDIAN 3412 |
| 197 | + |
| 198 | +# if defined(__BIGENDIAN__) |
| 199 | + |
| 200 | +# define __BYTE_ORDER __BIG_ENDIAN |
| 201 | + |
| 202 | +# define htobe16(x) (x) |
| 203 | +# define htobe32(x) (x) |
| 204 | +# define htobe64(x) (x) |
| 205 | + |
| 206 | +# define htole16(x) ENDIAN_SWAP16(x) |
| 207 | +# define htole32(x) ENDIAN_SWAP32(x) |
| 208 | +# define htole64(x) ENDIAN_SWAP64(x) |
| 209 | + |
| 210 | +# elif defined(__LITTLEENDIAN__) |
| 211 | + |
| 212 | +# define __BYTE_ORDER __LITTLE_ENDIAN |
| 213 | + |
| 214 | +# define htole16(x) (x) |
| 215 | +# define htole32(x) (x) |
| 216 | +# define htole64(x) (x) |
| 217 | + |
| 218 | +# define htobe16(x) ENDIAN_SWAP16(x) |
| 219 | +# define htobe32(x) ENDIAN_SWAP32(x) |
| 220 | +# define htobe64(x) ENDIAN_SWAP64(x) |
| 221 | + |
| 222 | +# else |
| 223 | + |
| 224 | +# error byte order not supported |
| 225 | + |
| 226 | +# endif |
| 227 | + |
| 228 | +# define be16toh(x) ENDIAN_BE16(x) |
| 229 | +# define be32toh(x) ENDIAN_BE32(x) |
| 230 | +# define be64toh(x) ENDIAN_BE64(x) |
| 231 | +# define le16toh(x) ENDIAN_LE16(x) |
| 232 | +# define le32toh(x) ENDIAN_LE32(x) |
| 233 | +# define le64toh(x) ENDIAN_LE64(x) |
| 234 | + |
| 235 | +#else |
| 236 | + |
| 237 | +# error platform not supported |
| 238 | + |
| 239 | +#endif |
| 240 | + |
| 241 | +#endif |
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