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129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/* Compatibility shim for <endian.h>
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*
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* "License": Public Domain
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* "Original": https://gist.github.com/panzi/6856583
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*
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* I, Mathias Panzenböck, place this file hereby into the public domain. Use it
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* at your own risk for whatever you like. In case there are jurisdictions that
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* don't support putting things in the public domain you can also consider it
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* to be "dual licensed" under the BSD, MIT and Apache licenses, if you want
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* to. This code is trivial anyway. Consider it an example on how to get the
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* endian conversion functions on different platforms.
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*
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* Modifications also in the Public Domain and dual licensed under BSD, MIT and
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* Apache licenses (using the terms outlined above):
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*
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* Copyright (C) 2016 Reece H. Dunn
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*/
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#ifndef ENDIAN_H_COMPAT_SHIM
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#define ENDIAN_H_COMPAT_SHIM
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#pragma once
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#if __has_include_next(<endian.h>)
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# pragma GCC system_header // Silence "warning: #include_next is a GCC extension"
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# include_next <endian.h>
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#elif __has_include(<sys/endian.h>)
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# include <sys/endian.h>
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# if !defined(be16toh)
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# define be16toh(x) betoh16(x)
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# endif
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# if !defined(le16toh)
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# define le16toh(x) letoh16(x)
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# endif
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# if !defined(be32toh)
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# define be32toh(x) betoh32(x)
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# endif
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# if !defined(le32toh)
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# define le32toh(x) letoh32(x)
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# endif
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# if !defined(be64toh)
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# define be64toh(x) betoh64(x)
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# endif
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# if !defined(le64toh)
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# define le64toh(x) letoh64(x)
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# endif
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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(_WIN16) || defined(_WIN32) || defined(_WIN64)
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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 /* 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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#elif defined(__sun) && defined(__SVR4) /* Solaris */
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# include <sys/byteorder.h>
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# define htobe16(x) BE_16(x)
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# define htole16(x) LE_16(x)
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# define be16toh(x) BE_16(x)
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# define le16toh(x) LE_16(x)
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# define htobe32(x) BE_32(x)
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# define htole32(x) LE_32(x)
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# define be32toh(x) BE_32(x)
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# define le32toh(x) LE_32(x)
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# define htobe64(x) BE_64(x)
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# define htole64(x) LE_64(x)
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# define be64toh(x) BE_64(x)
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# define le64toh(x) LE_64(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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