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portable_endian.h
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portable_endian.h
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#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__)
/* Define necessary macros for the header to expose all fields. */
# define _BSD_SOURCE
# define __USE_BSD
//# define _DEFAULT_SOURCE
# include <endian.h>
# include <features.h>
/* See http://linux.die.net/man/3/endian */
# if !defined(__GLIBC__) || !defined(__GLIBC_MINOR__) || ((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 9)))
# include <arpa/inet.h>
# if defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN)
# if !defined(htobe16)
# define htobe16(x) htons(x)
# endif
# if !defined(htole16)
# define htole16(x) (x)
# endif
# if !defined(be16toh)
# define be16toh(x) ntohs(x)
# endif
# if !defined(le16toh)
# define le16toh(x) (x)
# endif
# if !defined(htobe32)
# define htobe32(x) htonl(x)
# endif
# if !defined(htole32)
# define htole32(x) (x)
# endif
# if !defined(be32toh)
# define be32toh(x) ntohl(x)
# endif
# if !defined(le32toh)
# define le32toh(x) (x)
# endif
# if !defined(htobe64)
# define htobe64(x) (((uint64_t)htonl(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)htonl(((uint32_t)(x)))) << 32))
# endif
# if !defined(htole64)
# define htole64(x) (x)
# endif
# if !defined(be64toh)
# define be64toh(x) (((uint64_t)ntohl(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)ntohl(((uint32_t)(x)))) << 32))
# endif
# if !defined(le64toh)
# define le64toh(x) (x)
# endif
# elif defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)
# if !defined(htobe16)
# define htobe16(x) (x)
# endif
# if !defined(htole16)
# define htole16(x) ((((((uint16_t)(x)) >> 8))|((((uint16_t)(x)) << 8)))
# endif
# if !defined(be16toh)
# define be16toh(x) (x)
# endif
# if !defined(le16toh)
# define le16toh(x) ((((((uint16_t)(x)) >> 8))|((((uint16_t)(x)) << 8)))
# endif
# if !defined(htobe32)
# define htobe32(x) (x)
# endif
# if !defined(htole32)
# define htole32(x) (((uint32_t)htole16(((uint16_t)(((uint32_t)(x)) >> 16)))) | (((uint32_t)htole16(((uint16_t)(x)))) << 16))
# endif
# if !defined(be32toh)
# define be32toh(x) (x)
# endif
# if !defined(le32toh)
# define le32toh(x) (((uint32_t)le16toh(((uint16_t)(((uint32_t)(x)) >> 16)))) | (((uint32_t)le16toh(((uint16_t)(x)))) << 16))
# endif
# if !defined(htobe64)
# define htobe64(x) (x)
# endif
# if !defined(htole64)
# define htole64(x) (((uint64_t)htole32(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)htole32(((uint32_t)(x)))) << 32))
# endif
# if !defined(be64toh)
# define be64toh(x) (x)
# endif
# if !defined(__BYTE_ORDER)
# define le64toh(x) (((uint64_t)le32toh(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)le32toh(((uint32_t)(x)))) << 32))
# endif
# else
# error Byte Order not supported or not defined.
# endif
# endif
#elif defined(__APPLE__)
# include <libkern/OSByteOrder.h>
# define htobe16(x) OSSwapHostToBigInt16(x)
# define htole16(x) OSSwapHostToLittleInt16(x)
# define be16toh(x) OSSwapBigToHostInt16(x)
# define le16toh(x) OSSwapLittleToHostInt16(x)
# define htobe32(x) OSSwapHostToBigInt32(x)
# define htole32(x) OSSwapHostToLittleInt32(x)
# define be32toh(x) OSSwapBigToHostInt32(x)
# define le32toh(x) OSSwapLittleToHostInt32(x)
# define htobe64(x) OSSwapHostToBigInt64(x)
# define htole64(x) OSSwapHostToLittleInt64(x)
# define be64toh(x) OSSwapBigToHostInt64(x)
# define le64toh(x) OSSwapLittleToHostInt64(x)
# define __BYTE_ORDER BYTE_ORDER
# define __BIG_ENDIAN BIG_ENDIAN
# define __LITTLE_ENDIAN LITTLE_ENDIAN
# define __PDP_ENDIAN PDP_ENDIAN
#elif defined(__NetBSD__) || defined(__OpenBSD__)
# include <sys/endian.h>
#elif defined(__FreeBSD__) || defined(__DragonFly__)
# include <sys/endian.h>
# define be16toh(x) betoh16(x)
# define le16toh(x) letoh16(x)
# define be32toh(x) betoh32(x)
# define le32toh(x) letoh32(x)
# define be64toh(x) betoh64(x)
# define le64toh(x) letoh64(x)
#elif defined(__WINDOWS__)
# include <winsock2.h>
# if BYTE_ORDER == LITTLE_ENDIAN
# define htobe16(x) htons(x)
# define htole16(x) (x)
# define be16toh(x) ntohs(x)
# define le16toh(x) (x)
# define htobe32(x) htonl(x)
# define htole32(x) (x)
# define be32toh(x) ntohl(x)
# define le32toh(x) (x)
# define htobe64(x) htonll(x)
# define htole64(x) (x)
# define be64toh(x) ntohll(x)
# 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
#else
# error platform not supported
#endif
#endif