/*
   Copyright 2013-2015 Skytechnology sp. z o.o.

   This file is part of LizardFS.

   LizardFS is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, version 3.

   LizardFS is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with LizardFS. If not, see <http://www.gnu.org/licenses/>.
 */

// "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.

#pragma once

#include "common/platform.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(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(__FreeBSD_kernel__) || defined(__FreeBSD__)

#include <sys/endian.h>

#elif defined(__OpenBSD__) || 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>
#include <sys/param.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

#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(__sun__)

#include <sys/byteorder.h>

#define htobe16(x) BE_16(x)
#define htole16(x) LE_16(x)
#define be16toh(x) BE_IN16(x)
#define le16toh(x) LE_IN16(x)

#define htobe32(x) BE_32(x)
#define htole32(x) LE_32(x)
#define be32toh(x) BE_IN32(x)
#define le32toh(x) LE_IN32(x)

#define htobe64(x) BE_64(x)
#define htole64(x) LE_64(x)
#define be64toh(x) BE_IN64(x)
#define le64toh(x) LE_IN64(x)

#else

#error platform not supported

#endif
