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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef RTC_BASE_BYTE_ORDER_H_
#define RTC_BASE_BYTE_ORDER_H_
#include <stdint.h>
#if defined(WEBRTC_POSIX) && !defined(__native_client__)
#include <arpa/inet.h>
#endif
#include "rtc_base/system/arch.h"
#if defined(WEBRTC_MAC)
#include <libkern/OSByteOrder.h>
#define htobe16(v) OSSwapHostToBigInt16(v)
#define htobe32(v) OSSwapHostToBigInt32(v)
#define htobe64(v) OSSwapHostToBigInt64(v)
#define be16toh(v) OSSwapBigToHostInt16(v)
#define be32toh(v) OSSwapBigToHostInt32(v)
#define be64toh(v) OSSwapBigToHostInt64(v)
#define htole16(v) OSSwapHostToLittleInt16(v)
#define htole32(v) OSSwapHostToLittleInt32(v)
#define htole64(v) OSSwapHostToLittleInt64(v)
#define le16toh(v) OSSwapLittleToHostInt16(v)
#define le32toh(v) OSSwapLittleToHostInt32(v)
#define le64toh(v) OSSwapLittleToHostInt64(v)
#elif defined(WEBRTC_WIN) || defined(__native_client__)
#if defined(WEBRTC_WIN)
#include <stdlib.h>
#include <winsock2.h>
#else
#include <netinet/in.h>
#endif // defined(WEBRTC_WIN)
#if defined(WEBRTC_ARCH_LITTLE_ENDIAN)
#define htobe16(v) htons(v)
#define htobe32(v) htonl(v)
#define be16toh(v) ntohs(v)
#define be32toh(v) ntohl(v)
#define htole16(v) (v)
#define htole32(v) (v)
#define htole64(v) (v)
#define le16toh(v) (v)
#define le32toh(v) (v)
#define le64toh(v) (v)
#if defined(WEBRTC_WIN)
#define htobe64(v) _byteswap_uint64(v)
#define be64toh(v) _byteswap_uint64(v)
#endif // defined(WEBRTC_WIN)
#if defined(__native_client__)
#define htobe64(v) __builtin_bswap64(v)
#define be64toh(v) __builtin_bswap64(v)
#endif // defined(__native_client__)
#elif defined(WEBRTC_ARCH_BIG_ENDIAN)
#define htobe16(v) (v)
#define htobe32(v) (v)
#define be16toh(v) (v)
#define be32toh(v) (v)
#define htole16(v) __builtin_bswap16(v)
#define htole32(v) __builtin_bswap32(v)
#define htole64(v) __builtin_bswap64(v)
#define le16toh(v) __builtin_bswap16(v)
#define le32toh(v) __builtin_bswap32(v)
#define le64toh(v) __builtin_bswap64(v)
#if defined(WEBRTC_WIN)
#define htobe64(v) (v)
#define be64toh(v) (v)
#endif // defined(WEBRTC_WIN)
#if defined(__native_client__)
#define htobe64(v) (v)
#define be64toh(v) (v)
#endif // defined(__native_client__)
#else
#error WEBRTC_ARCH_BIG_ENDIAN or WEBRTC_ARCH_LITTLE_ENDIAN must be defined.
#endif // defined(WEBRTC_ARCH_LITTLE_ENDIAN)
#elif defined(WEBRTC_BSD) && !defined(__OpenBSD__)
#include <sys/endian.h>
#elif defined(WEBRTC_POSIX)
#include <endian.h>
#else
#error "Missing byte order functions for this arch."
#endif // defined(WEBRTC_MAC)
namespace rtc {
// Reading and writing of little and big-endian numbers from memory
inline void Set8(void* memory, size_t offset, uint8_t v) {
static_cast<uint8_t*>(memory)[offset] = v;
}
inline uint8_t Get8(const void* memory, size_t offset) {
return static_cast<const uint8_t*>(memory)[offset];
}
inline void SetBE16(void* memory, uint16_t v) {
*static_cast<uint16_t*>(memory) = htobe16(v);
}
inline void SetBE32(void* memory, uint32_t v) {
*static_cast<uint32_t*>(memory) = htobe32(v);
}
inline void SetBE64(void* memory, uint64_t v) {
#ifdef WEBRTC_WIN
//Mozilla: because we support Win7, htonll is not visible to us
Set8(memory, 0, static_cast<uint8_t>(v >> 56));
Set8(memory, 1, static_cast<uint8_t>(v >> 48));
Set8(memory, 2, static_cast<uint8_t>(v >> 40));
Set8(memory, 3, static_cast<uint8_t>(v >> 32));
Set8(memory, 4, static_cast<uint8_t>(v >> 24));
Set8(memory, 5, static_cast<uint8_t>(v >> 16));
Set8(memory, 6, static_cast<uint8_t>(v >> 8));
Set8(memory, 7, static_cast<uint8_t>(v >> 0));
#else
*static_cast<uint64_t*>(memory) = htobe64(v);
#endif
}
inline uint16_t GetBE16(const void* memory) {
return be16toh(*static_cast<const uint16_t*>(memory));
}
inline uint32_t GetBE32(const void* memory) {
return be32toh(*static_cast<const uint32_t*>(memory));
}
inline uint64_t GetBE64(const void* memory) {
#ifdef WEBRTC_WIN
return (static_cast<uint64_t>(Get8(memory, 0)) << 56) |
(static_cast<uint64_t>(Get8(memory, 1)) << 48) |
(static_cast<uint64_t>(Get8(memory, 2)) << 40) |
(static_cast<uint64_t>(Get8(memory, 3)) << 32) |
(static_cast<uint64_t>(Get8(memory, 4)) << 24) |
(static_cast<uint64_t>(Get8(memory, 5)) << 16) |
(static_cast<uint64_t>(Get8(memory, 6)) << 8) |
(static_cast<uint64_t>(Get8(memory, 7)) << 0);
#else
return be64toh(*static_cast<const uint64_t*>(memory));
#endif
}
inline void SetLE16(void* memory, uint16_t v) {
*static_cast<uint16_t*>(memory) = htole16(v);
}
inline void SetLE32(void* memory, uint32_t v) {
*static_cast<uint32_t*>(memory) = htole32(v);
}
inline void SetLE64(void* memory, uint64_t v) {
*static_cast<uint64_t*>(memory) = htole64(v);
}
inline uint16_t GetLE16(const void* memory) {
return le16toh(*static_cast<const uint16_t*>(memory));
}
inline uint32_t GetLE32(const void* memory) {
return le32toh(*static_cast<const uint32_t*>(memory));
}
inline uint64_t GetLE64(const void* memory) {
return le64toh(*static_cast<const uint64_t*>(memory));
}
// Check if the current host is big endian.
inline bool IsHostBigEndian() {
#if defined(WEBRTC_ARCH_BIG_ENDIAN)
return true;
#else
return false;
#endif
}
inline uint16_t HostToNetwork16(uint16_t n) {
return htobe16(n);
}
inline uint32_t HostToNetwork32(uint32_t n) {
return htobe32(n);
}
inline uint64_t HostToNetwork64(uint64_t n) {
#ifdef WEBRTC_WIN
uint64_t result;
SetBE64(&result, n);
return result;
#else
return htobe64(n);
#endif
}
inline uint16_t NetworkToHost16(uint16_t n) {
return be16toh(n);
}
inline uint32_t NetworkToHost32(uint32_t n) {
return be32toh(n);
}
inline uint64_t NetworkToHost64(uint64_t n) {
#ifdef WEBRTC_WIN
return GetBE64(&n);
#else
return be64toh(n);
#endif
}
} // namespace rtc
#endif // RTC_BASE_BYTE_ORDER_H_
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