#ifndef COMMON_ENDIAN_H
#define COMMON_ENDIAN_H

#ifdef __APPLE__
# include <machine/endian.h>
#elif defined(__linux__) || defined(__CYGWIN__) || defined(__OpenBSD__)
# include <endian.h>
#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
# include <sys/endian.h>
# ifdef __FreeBSD__
#  define LITTLE_ENDIAN _LITTLE_ENDIAN
#  define BIG_ENDIAN    _BIG_ENDIAN
#  define BYTE_ORDER    _BYTE_ORDER
# endif
#elif defined(_MSC_VER) || defined(_WIN16) || defined(_WIN32) || defined(_WIN64)
# ifdef _MSC_VER
#  define LITTLE_ENDIAN 1234
#  define BIG_ENDIAN    4321
#  if defined(_M_IX86) || defined(_M_X64) || defined(_M_AMD64) || defined(_M_IA64)
#   define BYTE_ORDER LITTLE_ENDIAN
#  elif defined(_M_PPC)
// Probably not reliable but eh
#   define BYTE_ORDER BIG_ENDIAN
#  endif
# elif defined(__GNUC__)
#  include <sys/param.h>
# endif
#endif

#if !defined(BYTE_ORDER) || !defined(LITTLE_ENDIAN) || !defined(BIG_ENDIAN) || \
    !(BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == BIG_ENDIAN)
# error "Couldn't determine endianness or unsupported platform"
#endif

#ifdef _MSC_VER
# define swap32(X) _byteswap_ulong((X))
# define swap16(X) _byteswap_ushort((X))
#elif (__GNUC__ == 4 && __GNUC_MINOR__ >= 8) || (__GNUC__ > 4)
# define swap32(X) __builtin_bswap32((X))
# define swap16(X) __builtin_bswap16((X))
// Apparently smelly GCC 5 blows up on this test so this is done separately for Clang
#elif defined(__has_builtin) && __has_builtin(__builtin_bswap32) && __has_builtin(__builtin_bswap16)
# define swap32(X) __builtin_bswap32((X))
# define swap16(X) __builtin_bswap16((X))
#else
static inline uint32_t swap32(uint32_t v)
{
	return (v << 24U) | ((v << 8U) & 0x00FF0000U) | ((v >> 8U) & 0x0000FF00U) | (v >> 24U);
}
static inline uint16_t swap16(uint16_t v)
{
	return (v << 8U) | (v >> 8U);
}
#endif

#if BYTE_ORDER == LITTLE_ENDIAN
# define SWAP_LE32(V) (V)
# define SWAP_LE16(V) (V)
# define SWAP_BE32(V) swap32((V))
# define SWAP_BE16(V) swap16((V))
#elif BYTE_ORDER == BIG_ENDIAN
# define SWAP_LE32(V) swap32((V))
# define SWAP_LE16(V) swap16((V))
# define SWAP_BE32(V) (V)
# define SWAP_BE16(V) (V)
#endif

#endif//COMMON_ENDIAN_H