| Howard Chen | a8830dc | 2017-02-16 14:28:08 +0800 | [diff] [blame] | 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 | #ifndef PORTABLE_ENDIAN_H__ |
| 8 | #define PORTABLE_ENDIAN_H__ |
| 9 | |
| 10 | #if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__) |
| 11 | |
| 12 | # define __WINDOWS__ |
| 13 | |
| 14 | #endif |
| 15 | |
| 16 | #if defined(__linux__) || defined(__CYGWIN__) |
| 17 | |
| 18 | # include <endian.h> |
| 19 | |
| 20 | #elif defined(__APPLE__) |
| 21 | |
| 22 | # include <libkern/OSByteOrder.h> |
| 23 | |
| 24 | # define htobe16(x) OSSwapHostToBigInt16(x) |
| 25 | # define htole16(x) OSSwapHostToLittleInt16(x) |
| 26 | # define be16toh(x) OSSwapBigToHostInt16(x) |
| 27 | # define le16toh(x) OSSwapLittleToHostInt16(x) |
| 28 | |
| 29 | # define htobe32(x) OSSwapHostToBigInt32(x) |
| 30 | # define htole32(x) OSSwapHostToLittleInt32(x) |
| 31 | # define be32toh(x) OSSwapBigToHostInt32(x) |
| 32 | # define le32toh(x) OSSwapLittleToHostInt32(x) |
| 33 | |
| 34 | # define htobe64(x) OSSwapHostToBigInt64(x) |
| 35 | # define htole64(x) OSSwapHostToLittleInt64(x) |
| 36 | # define be64toh(x) OSSwapBigToHostInt64(x) |
| 37 | # define le64toh(x) OSSwapLittleToHostInt64(x) |
| 38 | |
| 39 | # define __BYTE_ORDER BYTE_ORDER |
| 40 | # define __BIG_ENDIAN BIG_ENDIAN |
| 41 | # define __LITTLE_ENDIAN LITTLE_ENDIAN |
| 42 | # define __PDP_ENDIAN PDP_ENDIAN |
| 43 | |
| 44 | #elif defined(__OpenBSD__) |
| 45 | |
| 46 | # include <sys/endian.h> |
| 47 | |
| 48 | #elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) |
| 49 | |
| 50 | # include <sys/endian.h> |
| 51 | |
| 52 | # define be16toh(x) betoh16(x) |
| 53 | # define le16toh(x) letoh16(x) |
| 54 | |
| 55 | # define be32toh(x) betoh32(x) |
| 56 | # define le32toh(x) letoh32(x) |
| 57 | |
| 58 | # define be64toh(x) betoh64(x) |
| 59 | # define le64toh(x) letoh64(x) |
| 60 | |
| 61 | #elif defined(__WINDOWS__) |
| 62 | |
| 63 | # include <winsock2.h> |
| 64 | # include <sys/param.h> |
| 65 | |
| 66 | # if BYTE_ORDER == LITTLE_ENDIAN |
| 67 | |
| 68 | # define htobe16(x) htons(x) |
| 69 | # define htole16(x) (x) |
| 70 | # define be16toh(x) ntohs(x) |
| 71 | # define le16toh(x) (x) |
| 72 | |
| 73 | # define htobe32(x) htonl(x) |
| 74 | # define htole32(x) (x) |
| 75 | # define be32toh(x) ntohl(x) |
| 76 | # define le32toh(x) (x) |
| 77 | |
| 78 | # define htobe64(x) htonll(x) |
| 79 | # define htole64(x) (x) |
| 80 | # define be64toh(x) ntohll(x) |
| 81 | # define le64toh(x) (x) |
| 82 | |
| 83 | # elif BYTE_ORDER == BIG_ENDIAN |
| 84 | |
| 85 | /* that would be xbox 360 */ |
| 86 | # define htobe16(x) (x) |
| 87 | # define htole16(x) __builtin_bswap16(x) |
| 88 | # define be16toh(x) (x) |
| 89 | # define le16toh(x) __builtin_bswap16(x) |
| 90 | |
| 91 | # define htobe32(x) (x) |
| 92 | # define htole32(x) __builtin_bswap32(x) |
| 93 | # define be32toh(x) (x) |
| 94 | # define le32toh(x) __builtin_bswap32(x) |
| 95 | |
| 96 | # define htobe64(x) (x) |
| 97 | # define htole64(x) __builtin_bswap64(x) |
| 98 | # define be64toh(x) (x) |
| 99 | # define le64toh(x) __builtin_bswap64(x) |
| 100 | |
| 101 | # else |
| 102 | |
| 103 | # error byte order not supported |
| 104 | |
| 105 | # endif |
| 106 | |
| 107 | # define __BYTE_ORDER BYTE_ORDER |
| 108 | # define __BIG_ENDIAN BIG_ENDIAN |
| 109 | # define __LITTLE_ENDIAN LITTLE_ENDIAN |
| 110 | # define __PDP_ENDIAN PDP_ENDIAN |
| 111 | |
| 112 | #else |
| 113 | |
| 114 | # error platform not supported |
| 115 | |
| 116 | #endif |
| 117 | |
| 118 | #endif |