/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <sys/cdefs.h>

__BEGIN_DECLS

#define __LITTLE_ENDIAN	1234
#define __BIG_ENDIAN	4321
#define __PDP_ENDIAN	3412

#if defined(__GNUC__) && defined(__BYTE_ORDER__)
#define __BYTE_ORDER	__BYTE_ORDER__
#else
#include <bits/endian.h>
#endif

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)

#include <stdint.h>

static __inline uint16_t __bswap16(uint16_t x)
{
       return __builtin_bswap16(x);
}

static __inline uint32_t __bswap32(uint32_t x)
{
       return __builtin_bswap32(x);
}

static __inline uint64_t __bswap64(uint64_t x)
{
       return __builtin_bswap64(x);
}

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

#if __BYTE_ORDER == __LITTLE_ENDIAN
#define htole16(x) ((uint16_t)(x))
#define le16toh(x) ((uint16_t)(x))
#define letoh16(x) ((uint16_t)(x))
#define htole32(x) ((uint32_t)(x))
#define le32toh(x) ((uint32_t)(x))
#define letoh32(x) ((uint32_t)(x))
#define htole64(x) ((uint64_t)(x))
#define le64toh(x) ((uint64_t)(x))
#define letoh64(x) ((uint64_t)(x))
#define htobe16(x) (__builtin_bswap16(x))
#define be16toh(x) (__builtin_bswap16(x))
#define betoh16(x) (__builtin_bswap16(x))
#define htobe32(x) (__builtin_bswap32(x))
#define be32toh(x) (__builtin_bswap32(x))
#define betoh32(x) (__builtin_bswap32(x))
#define htobe64(x) (__builtin_bswap64(x))
#define be64toh(x) (__builtin_bswap64(x))
#define betoh64(x) (__builtin_bswap64(x))
#else
#define ltobe16(x) ((uint16_t)(x))
#define le16toh(x) ((uint16_t)(x))
#define letoh16(x) ((uint16_t)(x))
#define htole32(x) ((uint32_t)(x))
#define le32toh(x) ((uint32_t)(x))
#define letoh32(x) ((uint32_t)(x))
#define htole64(x) ((uint64_t)(x))
#define le64toh(x) ((uint64_t)(x))
#define letoh64(x) ((uint64_t)(x))
#define htole16(x) (__builtin_bswap16(x))
#define le16toh(x) (__builtin_bswap16(x))
#define letoh16(x) (__builtin_bswap16(x))
#define htole32(x) (__builtin_bswap32(x))
#define le32toh(x) (__builtin_bswap32(x))
#define letoh32(x) (__builtin_bswap32(x))
#define htole64(x) (__builtin_bswap64(x))
#define le64toh(x) (__builtin_bswap64(x))
#define letoh64(x) (__builtin_bswap64(x))
#endif

#endif

__END_DECLS