140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/**
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* Endian.h
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*
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* On Apple systems, there are no macro's to convert between little
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* and big endian byte orders. This header file adds the missing macros
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*
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* @author madmongo1 <https://github.com/madmongo1>
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*
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* And we have also copied code from the "portable_endian.h" file by
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* Mathias Panzenböck. His license:
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*
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* "License": Public Domain
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* I, Mathias Panzenböck, place this file hereby into the public
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* domain. Use it at your own risk for whatever you like. In case
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* there are jurisdictions that don't support putting things in the
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* public domain you can also consider it to be "dual licensed"
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* under the BSD, MIT and Apache licenses, if you want to. This
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* 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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/**
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* Include guard
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*/
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#pragma once
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/**
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* The contents of the file are only relevant for Apple
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*/
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#if defined(__APPLE__)
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// dependencies
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#include <machine/endian.h>
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#include <libkern/OSByteOrder.h>
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// define 16 bit macros
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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 32 bit macros
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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 64 but macros
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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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/**
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* And on Windows systems weird things are going on as well
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*/
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#elif (defined(_WIN16) || defined(_WIN32) || defined(_WIN64) || defined(__WINDOWS__)) && !defined(__CYGWIN__)
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#include <winsock2.h>
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#pragma comment(lib,"Ws2_32.lib")
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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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/**
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* OpenBSD handling
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*/
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#elif defined(__OpenBSD__)
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#include <sys/endian.h>
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/**
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* NetBSD handling
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*/
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#elif defined(__NetBSD__) || 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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/**
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* Not on apple, and not on windows
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*/
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#else
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// this is the normal linux way of doing things
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#include <endian.h>
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// end of "#if defined(__APPLE__)"
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#endif
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