177 lines
4.3 KiB
C
177 lines
4.3 KiB
C
// "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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#pragma once
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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(__linux__) || defined(__CYGWIN__)
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# include <endian.h>
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#elif defined(__APPLE__)
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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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# 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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#elif defined(__OpenBSD__)
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# include <sys/endian.h>
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#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
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# include <sys/endian.h>
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# define be16toh(x) betoh16(x)
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# define le16toh(x) letoh16(x)
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# define be32toh(x) betoh32(x)
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# define le32toh(x) letoh32(x)
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# define be64toh(x) betoh64(x)
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# define le64toh(x) letoh64(x)
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#elif defined(__WINDOWS__)
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# include <winsock2.h>
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# include <sys/param.h>
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# if BYTE_ORDER == LITTLE_ENDIAN
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# define htobe16(x) htons(x)
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# define htole16(x) (x)
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# define be16toh(x) ntohs(x)
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# define le16toh(x) (x)
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# define htobe32(x) htonl(x)
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# define htole32(x) (x)
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# define be32toh(x) ntohl(x)
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# define le32toh(x) (x)
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# define htobe64(x) htonll(x)
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# define htole64(x) (x)
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# define be64toh(x) ntohll(x)
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# define le64toh(x) (x)
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# elif BYTE_ORDER == BIG_ENDIAN
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/* that would be xbox 360 */
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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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# 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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#else
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# error platform not supported
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#endif
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// Adapted from Google's CityHash source code:
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//
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// https://github.com/google/cityhash/blob/8af9b8c2b889d80c22d6bc26ba0df1afb79a30db/src/city.cc#L50
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#if defined(_MSC_VER)
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#include <stdlib.h>
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#define bswap_16(x) _byteswap_ushort(x)
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#define bswap_32(x) _byteswap_ulong(x)
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#define bswap_64(x) _byteswap_uint64(x)
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#elif defined(__APPLE__)
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// Mac OS X / Darwin features
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#include <libkern/OSByteOrder.h>
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#define bswap_16(x) OSSwapInt16(x)
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#define bswap_32(x) OSSwapInt32(x)
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#define bswap_64(x) OSSwapInt64(x)
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#elif defined(__sun) || defined(sun)
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#include <sys/byteorder.h>
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#define bswap_16(x) BSWAP_16(x)
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#define bswap_32(x) BSWAP_32(x)
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#define bswap_64(x) BSWAP_64(x)
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#elif defined(__FreeBSD__)
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#include <sys/endian.h>
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#define bswap_16(x) bswap16(x)
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#define bswap_32(x) bswap32(x)
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#define bswap_64(x) bswap64(x)
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#elif defined(__OpenBSD__)
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#include <sys/types.h>
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#define bswap_16(x) swap16(x)
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#define bswap_32(x) swap32(x)
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#define bswap_64(x) swap64(x)
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#elif defined(__NetBSD__)
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#include <sys/types.h>
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#include <machine/bswap.h>
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#if defined(__BSWAP_RENAME) && !defined(__bswap_32)
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#define bswap_16(x) bswap16(x)
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#define bswap_32(x) bswap32(x)
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#define bswap_64(x) bswap64(x)
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#endif
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#elif __has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) && __has_builtin(__builtin_bswap64)
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#define bswap_16(x) __builtin_bswap16(x)
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#define bswap_32(x) __builtin_bswap32(x)
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#define bswap_64(x) __builtin_bswap64(x)
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#else
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#include <byteswap.h>
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#endif |