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