1f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch/* 2f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * libjingle 3f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * Copyright 2004--2005, Google Inc. 4f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 5f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * Redistribution and use in source and binary forms, with or without 6f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * modification, are permitted provided that the following conditions are met: 7f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 8f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 1. Redistributions of source code must retain the above copyright notice, 9f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * this list of conditions and the following disclaimer. 10f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 2. Redistributions in binary form must reproduce the above copyright notice, 11f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * this list of conditions and the following disclaimer in the documentation 12f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * and/or other materials provided with the distribution. 13f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 3. The name of the author may not be used to endorse or promote products 14f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * derived from this software without specific prior written permission. 15f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 16f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch */ 27f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 28f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#ifndef TALK_BASE_BYTEORDER_H__ 29f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#define TALK_BASE_BYTEORDER_H__ 30f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 31f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#ifdef POSIX 32f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include <arpa/inet.h> 33f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#endif 34f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 35f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#ifdef WIN32 36f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include <winsock2.h> 37f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#endif 38f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 39f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include "talk/base/basictypes.h" 40f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 41f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochnamespace talk_base { 42f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 43f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// Reading and writing of little and big-endian numbers from memory 44f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// TODO: Add HostEndian #defines (HE) 45f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// TODO: Consider NetworkEndian as synonym for BigEndian, for clarity in use. 46f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// TODO: Consider creating optimized versions, such as direct read/writes of 47f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// integers in host-endian format, when the platform supports it. 48f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 49f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline void Set8(void* memory, size_t offset, uint8 v) { 50f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch static_cast<uint8*>(memory)[offset] = v; 51f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 52f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint8 Get8(const void* memory, size_t offset) { 53f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return static_cast<const uint8*>(memory)[offset]; 54f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 55f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 56f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline void SetBE16(void* memory, uint16 v) { 57f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 0, static_cast<uint8>(v >> 8)); 58f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 1, static_cast<uint8>(v >> 0)); 59f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 60f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline void SetBE32(void* memory, uint32 v) { 61f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 0, static_cast<uint8>(v >> 24)); 62f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 1, static_cast<uint8>(v >> 16)); 63f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 2, static_cast<uint8>(v >> 8)); 64f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 3, static_cast<uint8>(v >> 0)); 65f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 66f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline void SetBE64(void* memory, uint64 v) { 67f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 0, static_cast<uint8>(v >> 56)); 68f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 1, static_cast<uint8>(v >> 48)); 69f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 2, static_cast<uint8>(v >> 40)); 70f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 3, static_cast<uint8>(v >> 32)); 71f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 4, static_cast<uint8>(v >> 24)); 72f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 5, static_cast<uint8>(v >> 16)); 73f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 6, static_cast<uint8>(v >> 8)); 74f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 7, static_cast<uint8>(v >> 0)); 75f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 76f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint16 GetBE16(const void* memory) { 77f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (static_cast<uint16>(Get8(memory, 0)) << 8) 78f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint16>(Get8(memory, 1)) << 0); 79f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 80f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint32 GetBE32(const void* memory) { 81f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (static_cast<uint32>(Get8(memory, 0)) << 24) 82f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint32>(Get8(memory, 1)) << 16) 83f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint32>(Get8(memory, 2)) << 8) 84f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint32>(Get8(memory, 3)) << 0); 85f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 86f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint64 GetBE64(const void* memory) { 87f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (static_cast<uint64>(Get8(memory, 0)) << 56) 88f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 1)) << 48) 89f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 2)) << 40) 90f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 3)) << 32) 91f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 4)) << 24) 92f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 5)) << 16) 93f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 6)) << 8) 94f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 7)) << 0); 95f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 96f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 97f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline void SetLE16(void* memory, uint16 v) { 98f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 1, static_cast<uint8>(v >> 8)); 99f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 0, static_cast<uint8>(v >> 0)); 100f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 101f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline void SetLE32(void* memory, uint32 v) { 102f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 3, static_cast<uint8>(v >> 24)); 103f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 2, static_cast<uint8>(v >> 16)); 104f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 1, static_cast<uint8>(v >> 8)); 105f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 0, static_cast<uint8>(v >> 0)); 106f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 107f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline void SetLE64(void* memory, uint64 v) { 108f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 7, static_cast<uint8>(v >> 56)); 109f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 6, static_cast<uint8>(v >> 48)); 110f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 5, static_cast<uint8>(v >> 40)); 111f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 4, static_cast<uint8>(v >> 32)); 112f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 3, static_cast<uint8>(v >> 24)); 113f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 2, static_cast<uint8>(v >> 16)); 114f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 1, static_cast<uint8>(v >> 8)); 115f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch Set8(memory, 0, static_cast<uint8>(v >> 0)); 116f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 117f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint16 GetLE16(const void* memory) { 118f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (static_cast<uint16>(Get8(memory, 1)) << 8) 119f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint16>(Get8(memory, 0)) << 0); 120f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 121f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint32 GetLE32(const void* memory) { 122f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (static_cast<uint32>(Get8(memory, 3)) << 24) 123f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint32>(Get8(memory, 2)) << 16) 124f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint32>(Get8(memory, 1)) << 8) 125f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint32>(Get8(memory, 0)) << 0); 126f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 127f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint64 GetLE64(const void* memory) { 128f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return (static_cast<uint64>(Get8(memory, 7)) << 56) 129f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 6)) << 48) 130f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 5)) << 40) 131f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 4)) << 32) 132f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 3)) << 24) 133f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 2)) << 16) 134f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 1)) << 8) 135f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch | (static_cast<uint64>(Get8(memory, 0)) << 0); 136f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 137f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 1383345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// Check if the current host is big endian. 1393345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickinline bool IsHostBigEndian() { 1403345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick static const int number = 1; 1413345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return (0 == *reinterpret_cast<const char*>(&number)); 1423345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 1433345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1443345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickinline uint16 HostToNetwork16(uint16 n) { 1453345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return htons(n); 1463345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 1473345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1483345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickinline uint32 HostToNetwork32(uint32 n) { 1493345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return htonl(n); 1503345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 1513345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1523345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickinline uint64 HostToNetwork64(uint64 n) { 1533345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // If the host is little endian, GetBE64 converts n to big network endian. 1543345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return IsHostBigEndian() ? n : GetBE64(&n); 1553345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 1563345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1573345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickinline uint16 NetworkToHost16(uint16 n) { 1583345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return ntohs(n); 1593345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 1603345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1613345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickinline uint32 NetworkToHost32(uint32 n) { 1623345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return ntohl(n); 1633345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 1643345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1653345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickinline uint64 NetworkToHost64(uint64 n) { 1663345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // If the host is little endian, GetBE64 converts n to little endian. 1673345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return IsHostBigEndian() ? n : GetBE64(&n); 1683345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 1693345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1703345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} // namespace talk_base 171f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 1723345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#endif // TALK_BASE_BYTEORDER_H__ 173