/*
 * Copyright (c) 2008-2014 Travis Geiselbrecht
 * Copyright 2016 The Fuchsia Authors
 *
 * Use of this source code is governed by a MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT
 */
#pragma once

#include <sys/types.h>

#ifndef __BYTE_ORDER__
#error Compiler does not provide __BYTE_ORDER__
#endif

/* the compiler provides it, use what it says */
#define LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
#define BIG_ENDIAN __ORDER_BIG_ENDIAN__
#define BYTE_ORDER __BYTE_ORDER__

// define a macro that unconditionally swaps
static inline uint64_t SWAP_64(uint64_t x) { return __builtin_bswap64(x); }
static inline uint32_t SWAP_32(uint32_t x) { return __builtin_bswap32(x); }
static inline uint16_t SWAP_16(uint16_t x) { return __builtin_bswap16(x); }

// standard swap macros
#if BYTE_ORDER == BIG_ENDIAN
#define LE64(val) SWAP_64(val)
#define LE32(val) SWAP_32(val)
#define LE16(val) SWAP_16(val)
#define BE64(val) (val)
#define BE32(val) (val)
#define BE16(val) (val)
#else
#define LE64(val) (val)
#define LE32(val) (val)
#define LE16(val) (val)
#define BE64(val) SWAP_64(val)
#define BE32(val) SWAP_32(val)
#define BE16(val) SWAP_16(val)
#endif

#define LE32SWAP(var) do { (var) = LE32(var); } while (0)
#define LE16SWAP(var) do { (var) = LE16(var); } while (0)
#define BE32SWAP(var) do { (var) = BE32(var); } while (0)
#define BE16SWAP(var) do { (var) = BE16(var); } while (0)

/* classic network byte swap stuff */
#define ntohs(n) BE16(n)
#define htons(h) BE16(h)
#define ntohl(n) BE32(n)
#define htonl(h) BE32(h)

/* 64-bit network byte swap stuff */
#define htobe64(h) BE64(h)
#define be64toh(b) BE64(b)