UBXProto/portable_endian.h

/*
 * Thanks to Mathias Panzenböck aka panzi
 * https://gist.github.com/panzi/6856583
 */
#ifndef PORTABLE_ENDIAN_H__
#define PORTABLE_ENDIAN_H__

#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)

#	define __WINDOWS__

#endif

#if defined(__linux__) || defined(__CYGWIN__)

#	include <endian.h>

#elif defined(__APPLE__)

#	include <libkern/OSByteOrder.h>

#	define htobe16 OSSwapHostToBigInt16
#	define htole16 OSSwapHostToLittleInt16
#	define be16toh OSSwapBigToHostInt16
#	define le16toh OSSwapLittleToHostInt16
 
#	define htobe32 OSSwapHostToBigInt32
#	define htole32 OSSwapHostToLittleInt32
#	define be32toh OSSwapBigToHostInt32
#	define le32toh OSSwapLittleToHostInt32
 
#	define htobe64 OSSwapHostToBigInt64
#	define htole64 OSSwapHostToLittleInt64
#	define be64toh OSSwapBigToHostInt64
#	define le64toh OSSwapLittleToHostInt64

#	define __BYTE_ORDER    BYTE_ORDER
#	define __BIG_ENDIAN    BIG_ENDIAN
#	define __LITTLE_ENDIAN LITTLE_ENDIAN
#	define __PDP_ENDIAN    PDP_ENDIAN

#elif defined(__OpenBSD__)

#	include <sys/endian.h>

#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)

#	include <sys/endian.h>

#	define be16toh betoh16
#	define le16toh letoh16

#	define be32toh betoh32
#	define le32toh letoh32

#	define be64toh betoh64
#	define le64toh letoh64

#elif defined(__WINDOWS__)

#	include <winsock2.h>
#	include <sys/param.h>

#	if BYTE_ORDER == LITTLE_ENDIAN

#		define htobe16 htons
#		define htole16(x) (x)
#		define be16toh ntohs
#		define le16toh(x) (x)
 
#		define htobe32 htonl
#		define htole32(x) (x)
#		define be32toh ntohl
#		define le32toh(x) (x)
 
#		define htobe64 htonll
#		define htole64(x) (x)
#		define be64toh ntohll
#		define le64toh(x) (x)

#	elif BYTE_ORDER == BIG_ENDIAN

		/* that would be xbox 360 */
#		define htobe16(x) (x)
#		define htole16(x) __builtin_bswap16(x)
#		define be16toh(x) (x)
#		define le16toh(x) __builtin_bswap16(x)
 
#		define htobe32(x) (x)
#		define htole32(x) __builtin_bswap32(x)
#		define be32toh(x) (x)
#		define le32toh(x) __builtin_bswap32(x)
 
#		define htobe64(x) (x)
#		define htole64(x) __builtin_bswap64(x)
#		define be64toh(x) (x)
#		define le64toh(x) __builtin_bswap64(x)

#	else

#		error byte order not supported

#	endif

#	define __BYTE_ORDER    BYTE_ORDER
#	define __BIG_ENDIAN    BIG_ENDIAN
#	define __LITTLE_ENDIAN LITTLE_ENDIAN
#	define __PDP_ENDIAN    PDP_ENDIAN

#elif defined(__QNXNTO__)

#   include <gulliver.h>
#	define htobe16 ENDIAN_BE16
#	define htole16 ENDIAN_LE16

#	define htobe32 ENDIAN_BE32
#	define htole32 ENDIAN_LE32

#	define htobe64 ENDIAN_BE64
#	define htole64 ENDIAN_LE64

#elif defined (__vxworks)
#   include <arch/arm/vxbAccessArchLib.h>
#else

#	error platform not supported

#endif

#endif //#ifndef PORTABLE_ENDIAN_H__