240 lines
6.6 KiB
C
240 lines
6.6 KiB
C
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// "License": Public Domain
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// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like.
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// In case there are jurisdictions that don't support putting things in the public domain you can also consider it to
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// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it
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// an example on how to get the endian conversion functions on different platforms.
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// updates from https://github.com/mikepb/endian.h/issues/4
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#ifndef ENDIAN_H
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#define ENDIAN_H
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#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
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# define __WINDOWS__
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#endif
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#if defined(HAVE_ENDIAN_H) || \
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defined(__linux__) || \
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defined(__GNU__) || \
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defined(__illumos__) || \
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defined(__NetBSD__) || \
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defined(__OpenBSD__) || \
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defined(__CYGWIN__) || \
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defined(__MSYS__) || \
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defined(__EMSCRIPTEN__) || \
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defined(__wasi__)
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#if defined(__NetBSD__)
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#define _NETBSD_SOURCE 1
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#endif
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# include <endian.h>
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#elif defined(HAVE_SYS_ENDIAN_H) || \
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defined(__FreeBSD__) || \
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defined(__DragonFly__)
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# include <sys/endian.h>
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#elif defined(__APPLE__)
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# define __BYTE_ORDER BYTE_ORDER
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# define __BIG_ENDIAN BIG_ENDIAN
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# define __LITTLE_ENDIAN LITTLE_ENDIAN
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# define __PDP_ENDIAN PDP_ENDIAN
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# if !defined(_POSIX_C_SOURCE)
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# include <libkern/OSByteOrder.h>
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# define htobe16(x) OSSwapHostToBigInt16(x)
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# define htole16(x) OSSwapHostToLittleInt16(x)
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# define be16toh(x) OSSwapBigToHostInt16(x)
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# define le16toh(x) OSSwapLittleToHostInt16(x)
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# define htobe32(x) OSSwapHostToBigInt32(x)
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# define htole32(x) OSSwapHostToLittleInt32(x)
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# define be32toh(x) OSSwapBigToHostInt32(x)
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# define le32toh(x) OSSwapLittleToHostInt32(x)
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# define htobe64(x) OSSwapHostToBigInt64(x)
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# define htole64(x) OSSwapHostToLittleInt64(x)
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# define be64toh(x) OSSwapBigToHostInt64(x)
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# define le64toh(x) OSSwapLittleToHostInt64(x)
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# else
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# if BYTE_ORDER == LITTLE_ENDIAN
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# define htobe16(x) __builtin_bswap16(x)
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# define htole16(x) (x)
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# define be16toh(x) __builtin_bswap16(x)
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# define le16toh(x) (x)
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# define htobe32(x) __builtin_bswap32(x)
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# define htole32(x) (x)
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# define be32toh(x) __builtin_bswap32(x)
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# define le32toh(x) (x)
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# define htobe64(x) __builtin_bswap64(x)
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# define htole64(x) (x)
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# define be64toh(x) __builtin_bswap64(x)
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# define le64toh(x) (x)
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# elif BYTE_ORDER == BIG_ENDIAN
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# define htobe16(x) (x)
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# define htole16(x) __builtin_bswap16(x)
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# define be16toh(x) (x)
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# define le16toh(x) __builtin_bswap16(x)
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# define htobe32(x) (x)
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# define htole32(x) __builtin_bswap32(x)
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# define be32toh(x) (x)
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# define le32toh(x) __builtin_bswap32(x)
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# define htobe64(x) (x)
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# define htole64(x) __builtin_bswap64(x)
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# define be64toh(x) (x)
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# define le64toh(x) __builtin_bswap64(x)
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# else
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# error byte order not supported
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# endif
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# endif
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#elif defined(__WINDOWS__)
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# if defined(_MSC_VER) && !defined(__clang__)
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# include <stdlib.h>
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# define B_SWAP_16(x) _byteswap_ushort(x)
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# define B_SWAP_32(x) _byteswap_ulong(x)
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# define B_SWAP_64(x) _byteswap_uint64(x)
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# else
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# define B_SWAP_16(x) __builtin_bswap16(x)
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# define B_SWAP_32(x) __builtin_bswap32(x)
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# define B_SWAP_64(x) __builtin_bswap64(x)
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# endif
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# if defined(__MINGW32__) || defined(HAVE_SYS_PARAM_H)
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# include <sys/param.h>
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# endif
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# ifndef BIG_ENDIAN
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# ifdef __BIG_ENDIAN
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# define BIG_ENDIAN __BIG_ENDIAN
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# elif defined(__ORDER_BIG_ENDIAN__)
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# define BIG_ENDIAN __ORDER_BIG_ENDIAN__
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# else
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# define BIG_ENDIAN 4321
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# endif
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# endif
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# ifndef LITTLE_ENDIAN
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# ifdef __LITTLE_ENDIAN
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# define LITTLE_ENDIAN __LITTLE_ENDIAN
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# elif defined(__ORDER_LITTLE_ENDIAN__)
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# define LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
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# else
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# define LITTLE_ENDIAN 1234
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# endif
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# endif
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# ifndef BYTE_ORDER
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# ifdef __BYTE_ORDER
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# define BYTE_ORDER __BYTE_ORDER
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# elif defined(__BYTE_ORDER__)
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# define BYTE_ORDER __BYTE_ORDER__
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# else
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/* assume LE on Windows if nothing was defined */
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# define BYTE_ORDER LITTLE_ENDIAN
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# endif
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# endif
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# if BYTE_ORDER == LITTLE_ENDIAN
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# define htobe16(x) B_SWAP_16(x)
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# define htole16(x) (x)
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# define be16toh(x) B_SWAP_16(x)
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# define le16toh(x) (x)
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# define htobe32(x) B_SWAP_32(x)
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# define htole32(x) (x)
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# define be32toh(x) B_SWAP_32(x)
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# define le32toh(x) (x)
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# define htobe64(x) B_SWAP_64(x)
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# define htole64(x) (x)
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# define be64toh(x) B_SWAP_64(x)
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# define le64toh(x) (x)
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# elif BYTE_ORDER == BIG_ENDIAN
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# define htobe16(x) (x)
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# define htole16(x) B_SWAP_16(x)
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# define be16toh(x) (x)
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# define le16toh(x) B_SWAP_16(x)
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# define htobe32(x) (x)
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# define htole32(x) B_SWAP_32(x)
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# define be32toh(x) (x)
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# define le32toh(x) B_SWAP_32(x)
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# define htobe64(x) (x)
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# define htole64(x) B_SWAP_64(x)
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# define be64toh(x) (x)
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# define le64toh(x) B_SWAP_64(x)
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# else
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# error byte order not supported
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# endif
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#elif defined(__QNXNTO__)
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# include <gulliver.h>
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# define __LITTLE_ENDIAN 1234
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# define __BIG_ENDIAN 4321
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# define __PDP_ENDIAN 3412
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# if defined(__BIGENDIAN__)
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# define __BYTE_ORDER __BIG_ENDIAN
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# define htobe16(x) (x)
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# define htobe32(x) (x)
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# define htobe64(x) (x)
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# define htole16(x) ENDIAN_SWAP16(x)
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# define htole32(x) ENDIAN_SWAP32(x)
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# define htole64(x) ENDIAN_SWAP64(x)
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# elif defined(__LITTLEENDIAN__)
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# define __BYTE_ORDER __LITTLE_ENDIAN
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# define htole16(x) (x)
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# define htole32(x) (x)
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# define htole64(x) (x)
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# define htobe16(x) ENDIAN_SWAP16(x)
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# define htobe32(x) ENDIAN_SWAP32(x)
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# define htobe64(x) ENDIAN_SWAP64(x)
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# else
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# error byte order not supported
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# endif
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# define be16toh(x) ENDIAN_BE16(x)
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# define be32toh(x) ENDIAN_BE32(x)
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# define be64toh(x) ENDIAN_BE64(x)
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# define le16toh(x) ENDIAN_LE16(x)
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# define le32toh(x) ENDIAN_LE32(x)
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# define le64toh(x) ENDIAN_LE64(x)
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#else
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# error platform not supported
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#endif
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#endif
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