Moving src/webrtc into src/.
In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
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Mirko Bonadei
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283
rtc_base/bytebuffer.cc
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283
rtc_base/bytebuffer.cc
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/*
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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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#include "webrtc/rtc_base/bytebuffer.h"
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#include <string.h>
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#include <algorithm>
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#include "webrtc/rtc_base/basictypes.h"
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#include "webrtc/rtc_base/byteorder.h"
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namespace rtc {
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static const int DEFAULT_SIZE = 4096;
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ByteBufferWriter::ByteBufferWriter()
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: ByteBuffer(ORDER_NETWORK) {
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Construct(nullptr, DEFAULT_SIZE);
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}
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ByteBufferWriter::ByteBufferWriter(ByteOrder byte_order)
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: ByteBuffer(byte_order) {
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Construct(nullptr, DEFAULT_SIZE);
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}
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ByteBufferWriter::ByteBufferWriter(const char* bytes, size_t len)
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: ByteBuffer(ORDER_NETWORK) {
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Construct(bytes, len);
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}
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ByteBufferWriter::ByteBufferWriter(const char* bytes, size_t len,
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ByteOrder byte_order)
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: ByteBuffer(byte_order) {
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Construct(bytes, len);
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}
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void ByteBufferWriter::Construct(const char* bytes, size_t len) {
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size_ = len;
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bytes_ = new char[size_];
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if (bytes) {
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end_ = len;
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memcpy(bytes_, bytes, end_);
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} else {
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end_ = 0;
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}
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}
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ByteBufferWriter::~ByteBufferWriter() {
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delete[] bytes_;
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}
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void ByteBufferWriter::WriteUInt8(uint8_t val) {
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WriteBytes(reinterpret_cast<const char*>(&val), 1);
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}
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void ByteBufferWriter::WriteUInt16(uint16_t val) {
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uint16_t v = (Order() == ORDER_NETWORK) ? HostToNetwork16(val) : val;
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WriteBytes(reinterpret_cast<const char*>(&v), 2);
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}
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void ByteBufferWriter::WriteUInt24(uint32_t val) {
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uint32_t v = (Order() == ORDER_NETWORK) ? HostToNetwork32(val) : val;
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char* start = reinterpret_cast<char*>(&v);
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if (Order() == ORDER_NETWORK || IsHostBigEndian()) {
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++start;
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}
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WriteBytes(start, 3);
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}
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void ByteBufferWriter::WriteUInt32(uint32_t val) {
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uint32_t v = (Order() == ORDER_NETWORK) ? HostToNetwork32(val) : val;
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WriteBytes(reinterpret_cast<const char*>(&v), 4);
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}
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void ByteBufferWriter::WriteUInt64(uint64_t val) {
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uint64_t v = (Order() == ORDER_NETWORK) ? HostToNetwork64(val) : val;
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WriteBytes(reinterpret_cast<const char*>(&v), 8);
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}
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// Serializes an unsigned varint in the format described by
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// https://developers.google.com/protocol-buffers/docs/encoding#varints
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// with the caveat that integers are 64-bit, not 128-bit.
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void ByteBufferWriter::WriteUVarint(uint64_t val) {
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while (val >= 0x80) {
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// Write 7 bits at a time, then set the msb to a continuation byte (msb=1).
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char byte = static_cast<char>(val) | 0x80;
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WriteBytes(&byte, 1);
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val >>= 7;
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}
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char last_byte = static_cast<char>(val);
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WriteBytes(&last_byte, 1);
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}
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void ByteBufferWriter::WriteString(const std::string& val) {
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WriteBytes(val.c_str(), val.size());
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}
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void ByteBufferWriter::WriteBytes(const char* val, size_t len) {
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memcpy(ReserveWriteBuffer(len), val, len);
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}
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char* ByteBufferWriter::ReserveWriteBuffer(size_t len) {
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if (Length() + len > Capacity())
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Resize(Length() + len);
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char* start = bytes_ + end_;
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end_ += len;
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return start;
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}
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void ByteBufferWriter::Resize(size_t size) {
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size_t len = std::min(end_, size);
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if (size > size_) {
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// Reallocate a larger buffer.
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size_ = std::max(size, 3 * size_ / 2);
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char* new_bytes = new char[size_];
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memcpy(new_bytes, bytes_, len);
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delete [] bytes_;
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bytes_ = new_bytes;
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}
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end_ = len;
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}
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void ByteBufferWriter::Clear() {
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memset(bytes_, 0, size_);
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end_ = 0;
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}
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ByteBufferReader::ByteBufferReader(const char* bytes, size_t len)
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: ByteBuffer(ORDER_NETWORK) {
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Construct(bytes, len);
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}
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ByteBufferReader::ByteBufferReader(const char* bytes, size_t len,
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ByteOrder byte_order)
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: ByteBuffer(byte_order) {
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Construct(bytes, len);
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}
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ByteBufferReader::ByteBufferReader(const char* bytes)
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: ByteBuffer(ORDER_NETWORK) {
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Construct(bytes, strlen(bytes));
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}
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ByteBufferReader::ByteBufferReader(const Buffer& buf)
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: ByteBuffer(ORDER_NETWORK) {
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Construct(buf.data<char>(), buf.size());
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}
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ByteBufferReader::ByteBufferReader(const ByteBufferWriter& buf)
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: ByteBuffer(buf.Order()) {
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Construct(buf.Data(), buf.Length());
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}
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void ByteBufferReader::Construct(const char* bytes, size_t len) {
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bytes_ = bytes;
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size_ = len;
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start_ = 0;
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end_ = len;
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}
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bool ByteBufferReader::ReadUInt8(uint8_t* val) {
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if (!val) return false;
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return ReadBytes(reinterpret_cast<char*>(val), 1);
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}
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bool ByteBufferReader::ReadUInt16(uint16_t* val) {
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if (!val) return false;
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uint16_t v;
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if (!ReadBytes(reinterpret_cast<char*>(&v), 2)) {
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return false;
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} else {
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*val = (Order() == ORDER_NETWORK) ? NetworkToHost16(v) : v;
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return true;
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}
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}
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bool ByteBufferReader::ReadUInt24(uint32_t* val) {
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if (!val) return false;
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uint32_t v = 0;
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char* read_into = reinterpret_cast<char*>(&v);
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if (Order() == ORDER_NETWORK || IsHostBigEndian()) {
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++read_into;
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}
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if (!ReadBytes(read_into, 3)) {
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return false;
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} else {
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*val = (Order() == ORDER_NETWORK) ? NetworkToHost32(v) : v;
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return true;
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}
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}
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bool ByteBufferReader::ReadUInt32(uint32_t* val) {
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if (!val) return false;
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uint32_t v;
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if (!ReadBytes(reinterpret_cast<char*>(&v), 4)) {
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return false;
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} else {
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*val = (Order() == ORDER_NETWORK) ? NetworkToHost32(v) : v;
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return true;
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}
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}
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bool ByteBufferReader::ReadUInt64(uint64_t* val) {
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if (!val) return false;
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uint64_t v;
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if (!ReadBytes(reinterpret_cast<char*>(&v), 8)) {
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return false;
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} else {
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*val = (Order() == ORDER_NETWORK) ? NetworkToHost64(v) : v;
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return true;
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}
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}
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bool ByteBufferReader::ReadUVarint(uint64_t* val) {
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if (!val) {
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return false;
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}
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// Integers are deserialized 7 bits at a time, with each byte having a
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// continuation byte (msb=1) if there are more bytes to be read.
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uint64_t v = 0;
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for (int i = 0; i < 64; i += 7) {
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char byte;
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if (!ReadBytes(&byte, 1)) {
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return false;
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}
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// Read the first 7 bits of the byte, then offset by bits read so far.
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v |= (static_cast<uint64_t>(byte) & 0x7F) << i;
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// True if the msb is not a continuation byte.
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if (static_cast<uint64_t>(byte) < 0x80) {
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*val = v;
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return true;
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}
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}
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return false;
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}
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bool ByteBufferReader::ReadString(std::string* val, size_t len) {
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if (!val) return false;
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if (len > Length()) {
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return false;
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} else {
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val->append(bytes_ + start_, len);
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start_ += len;
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return true;
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}
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}
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bool ByteBufferReader::ReadBytes(char* val, size_t len) {
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if (len > Length()) {
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return false;
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} else {
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memcpy(val, bytes_ + start_, len);
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start_ += len;
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return true;
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}
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}
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bool ByteBufferReader::Consume(size_t size) {
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if (size > Length())
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return false;
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start_ += size;
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return true;
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}
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} // namespace rtc
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