/* Copyright (C) 2016 NooBaa */
#pragma once

// Based on https://gist.github.com/panzi/6856583

// "License": Public Domain
// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like.
// In case there are jurisdictions that don't support putting things in the public domain you can also consider it to
// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it
// an example on how to get the endian conversion functions on different platforms.

#if defined(_WIN16) || defined(_WIN32) || defined(_WIN64)
#ifndef __WINDOWS__
#define __WINDOWS__
#endif
#endif

#if defined(__linux__) || defined(__CYGWIN__)
#include <endian.h>
#if !defined(htobe32) && defined(__bswap_32)
#include <byteswap.h>
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define htole16(x) (x)
#define htole32(x) (x)
#define htole64(x) (x)
#define le16toh(x) (x)
#define le32toh(x) (x)
#define le64toh(x) (x)
#define htobe16(x) __bswap_16(x)
#define htobe32(x) __bswap_32(x)
#define htobe64(x) __bswap_64(x)
#define be16toh(x) __bswap_16(x)
#define be32toh(x) __bswap_32(x)
#define be64toh(x) __bswap_64(x)
#elif __BYTE_ORDER == BIG_ENDIAN
#define htole16(x) __bswap_16(x)
#define htole32(x) __bswap_32(x)
#define htole64(x) __bswap_64(x)
#define le16toh(x) __bswap_16(x)
#define le32toh(x) __bswap_32(x)
#define le64toh(x) __bswap_64(x)
#define htobe16(x) (x)
#define htobe32(x) (x)
#define htobe64(x) (x)
#define be16toh(x) (x)
#define be32toh(x) (x)
#define be64toh(x) (x)
#else
#error byte order not supported
#endif
#endif

#elif defined(__APPLE__)
#include <libkern/OSByteOrder.h>
#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN PDP_ENDIAN
#define htole16(x) OSSwapHostToLittleInt16(x)
#define htole32(x) OSSwapHostToLittleInt32(x)
#define htole64(x) OSSwapHostToLittleInt64(x)
#define le16toh(x) OSSwapLittleToHostInt16(x)
#define le32toh(x) OSSwapLittleToHostInt32(x)
#define le64toh(x) OSSwapLittleToHostInt64(x)
#define htobe16(x) OSSwapHostToBigInt16(x)
#define htobe32(x) OSSwapHostToBigInt32(x)
#define htobe64(x) OSSwapHostToBigInt64(x)
#define be16toh(x) OSSwapBigToHostInt16(x)
#define be32toh(x) OSSwapBigToHostInt32(x)
#define be64toh(x) OSSwapBigToHostInt64(x)

#elif defined(__OpenBSD__)
#include <sys/endian.h>

#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
#include <sys/endian.h>
#define le16toh(x) letoh16(x)
#define le32toh(x) letoh32(x)
#define le64toh(x) letoh64(x)
#define be16toh(x) betoh16(x)
#define be32toh(x) betoh32(x)
#define be64toh(x) betoh64(x)

#elif defined(__WINDOWS__)
#include <winsock2.h>
#define __BYTE_ORDER BYTE_ORDER
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __PDP_ENDIAN PDP_ENDIAN
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define htole16(x) (x)
#define htole32(x) (x)
#define htole64(x) (x)
#define le16toh(x) (x)
#define le32toh(x) (x)
#define le64toh(x) (x)
#define htobe16(x) _byteswap_ushort(x)
#define htobe32(x) _byteswap_ulong(x)
#define htobe64(x) _byteswap_uint64(x)
#define be16toh(x) _byteswap_ushort(x)
#define be32toh(x) _byteswap_ulong(x)
#define be64toh(x) _byteswap_uint64(x)
#elif __BYTE_ORDER == BIG_ENDIAN
/* that would be xbox 360 */
#define htole16(x) _byteswap_ushort(x)
#define htole32(x) _byteswap_ulong(x)
#define htole64(x) _byteswap_uint64(x)
#define le16toh(x) _byteswap_ushort(x)
#define le32toh(x) _byteswap_ulong(x)
#define le64toh(x) _byteswap_uint64(x)
#define htobe16(x) (x)
#define htobe32(x) (x)
#define htobe64(x) (x)
#define be16toh(x) (x)
#define be32toh(x) (x)
#define be64toh(x) (x)
#else
#error byte order not supported
#endif

#else
#error platform not supported
#endif
