endian.h

/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#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 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))
#        define htobe16(x) ((uint16_t)(x))
#        define be16toh(x) ((uint16_t)(x))
#        define betoh16(x) ((uint16_t)(x))
#        define htobe32(x) ((uint32_t)(x))
#        define be32toh(x) ((uint32_t)(x))
#        define betoh32(x) ((uint32_t)(x))
#        define htobe64(x) ((uint64_t)(x))
#        define be64toh(x) ((uint64_t)(x))
#        define betoh64(x) ((uint64_t)(x))
#    endif

#endif

__END_DECLS