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Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

Browse Source 
BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
henrike@webrtc.org
2014-05-12 18:03:09 +00:00
parent f3a5e6afc4
commit 2c7d1b39b9
386 changed files with 84973 additions and 6 deletions
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168
webrtc/base/byteorder.h Normal file
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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 WEBRTC_BASE_BYTEORDER_H_
#define WEBRTC_BASE_BYTEORDER_H_
#if defined(WEBRTC_POSIX) && !defined(__native_client__)
#include <arpa/inet.h>
#endif
#if defined(WEBRTC_WIN)
#include <stdlib.h>
#endif
#include "webrtc/base/basictypes.h"
namespace rtc {
// Reading and writing of little and big-endian numbers from memory
// TODO: Optimized versions, with direct read/writes of
// integers in host-endian format, when the platform supports it.
inline void Set8(void* memory, size_t offset, uint8 v) {
static_cast<uint8*>(memory)[offset] = v;
}
inline uint8 Get8(const void* memory, size_t offset) {
return static_cast<const uint8*>(memory)[offset];
}
inline void SetBE16(void* memory, uint16 v) {
Set8(memory, 0, static_cast<uint8>(v >> 8));
Set8(memory, 1, static_cast<uint8>(v >> 0));
}
inline void SetBE32(void* memory, uint32 v) {
Set8(memory, 0, static_cast<uint8>(v >> 24));
Set8(memory, 1, static_cast<uint8>(v >> 16));
Set8(memory, 2, static_cast<uint8>(v >> 8));
Set8(memory, 3, static_cast<uint8>(v >> 0));
}
inline void SetBE64(void* memory, uint64 v) {
Set8(memory, 0, static_cast<uint8>(v >> 56));
Set8(memory, 1, static_cast<uint8>(v >> 48));
Set8(memory, 2, static_cast<uint8>(v >> 40));
Set8(memory, 3, static_cast<uint8>(v >> 32));
Set8(memory, 4, static_cast<uint8>(v >> 24));
Set8(memory, 5, static_cast<uint8>(v >> 16));
Set8(memory, 6, static_cast<uint8>(v >> 8));
Set8(memory, 7, static_cast<uint8>(v >> 0));
}
inline uint16 GetBE16(const void* memory) {
return static_cast<uint16>((Get8(memory, 0) << 8) |
(Get8(memory, 1) << 0));
}
inline uint32 GetBE32(const void* memory) {
return (static_cast<uint32>(Get8(memory, 0)) << 24) |
(static_cast<uint32>(Get8(memory, 1)) << 16) |
(static_cast<uint32>(Get8(memory, 2)) << 8) |
(static_cast<uint32>(Get8(memory, 3)) << 0);
}
inline uint64 GetBE64(const void* memory) {
return (static_cast<uint64>(Get8(memory, 0)) << 56) |
(static_cast<uint64>(Get8(memory, 1)) << 48) |
(static_cast<uint64>(Get8(memory, 2)) << 40) |
(static_cast<uint64>(Get8(memory, 3)) << 32) |
(static_cast<uint64>(Get8(memory, 4)) << 24) |
(static_cast<uint64>(Get8(memory, 5)) << 16) |
(static_cast<uint64>(Get8(memory, 6)) << 8) |
(static_cast<uint64>(Get8(memory, 7)) << 0);
}
inline void SetLE16(void* memory, uint16 v) {
Set8(memory, 0, static_cast<uint8>(v >> 0));
Set8(memory, 1, static_cast<uint8>(v >> 8));
}
inline void SetLE32(void* memory, uint32 v) {
Set8(memory, 0, static_cast<uint8>(v >> 0));
Set8(memory, 1, static_cast<uint8>(v >> 8));
Set8(memory, 2, static_cast<uint8>(v >> 16));
Set8(memory, 3, static_cast<uint8>(v >> 24));
}
inline void SetLE64(void* memory, uint64 v) {
Set8(memory, 0, static_cast<uint8>(v >> 0));
Set8(memory, 1, static_cast<uint8>(v >> 8));
Set8(memory, 2, static_cast<uint8>(v >> 16));
Set8(memory, 3, static_cast<uint8>(v >> 24));
Set8(memory, 4, static_cast<uint8>(v >> 32));
Set8(memory, 5, static_cast<uint8>(v >> 40));
Set8(memory, 6, static_cast<uint8>(v >> 48));
Set8(memory, 7, static_cast<uint8>(v >> 56));
}
inline uint16 GetLE16(const void* memory) {
return static_cast<uint16>((Get8(memory, 0) << 0) |
(Get8(memory, 1) << 8));
}
inline uint32 GetLE32(const void* memory) {
return (static_cast<uint32>(Get8(memory, 0)) << 0) |
(static_cast<uint32>(Get8(memory, 1)) << 8) |
(static_cast<uint32>(Get8(memory, 2)) << 16) |
(static_cast<uint32>(Get8(memory, 3)) << 24);
}
inline uint64 GetLE64(const void* memory) {
return (static_cast<uint64>(Get8(memory, 0)) << 0) |
(static_cast<uint64>(Get8(memory, 1)) << 8) |
(static_cast<uint64>(Get8(memory, 2)) << 16) |
(static_cast<uint64>(Get8(memory, 3)) << 24) |
(static_cast<uint64>(Get8(memory, 4)) << 32) |
(static_cast<uint64>(Get8(memory, 5)) << 40) |
(static_cast<uint64>(Get8(memory, 6)) << 48) |
(static_cast<uint64>(Get8(memory, 7)) << 56);
}
// Check if the current host is big endian.
inline bool IsHostBigEndian() {
static const int number = 1;
return 0 == *reinterpret_cast<const char*>(&number);
}
inline uint16 HostToNetwork16(uint16 n) {
uint16 result;
SetBE16(&result, n);
return result;
}
inline uint32 HostToNetwork32(uint32 n) {
uint32 result;
SetBE32(&result, n);
return result;
}
inline uint64 HostToNetwork64(uint64 n) {
uint64 result;
SetBE64(&result, n);
return result;
}
inline uint16 NetworkToHost16(uint16 n) {
return GetBE16(&n);
}
inline uint32 NetworkToHost32(uint32 n) {
return GetBE32(&n);
}
inline uint64 NetworkToHost64(uint64 n) {
return GetBE64(&n);
}
} // namespace rtc
#endif // WEBRTC_BASE_BYTEORDER_H_