Move webrtc/{base => rtc_base}

webrtc/base/bytebuffer.cc

-/*
- *  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.
- */
-
-#include "webrtc/base/bytebuffer.h"
-
-#include <string.h>
-
-#include <algorithm>
-
-#include "webrtc/base/basictypes.h"
-#include "webrtc/base/byteorder.h"
-
-namespace rtc {
-
-static const int DEFAULT_SIZE = 4096;
-
-ByteBufferWriter::ByteBufferWriter()
-    : ByteBuffer(ORDER_NETWORK) {
-  Construct(nullptr, DEFAULT_SIZE);
-}
-
-ByteBufferWriter::ByteBufferWriter(ByteOrder byte_order)
-    : ByteBuffer(byte_order) {
-  Construct(nullptr, DEFAULT_SIZE);
-}
-
-ByteBufferWriter::ByteBufferWriter(const char* bytes, size_t len)
-    : ByteBuffer(ORDER_NETWORK) {
-  Construct(bytes, len);
-}
-
-ByteBufferWriter::ByteBufferWriter(const char* bytes, size_t len,
-                                   ByteOrder byte_order)
-    : ByteBuffer(byte_order) {
-  Construct(bytes, len);
-}
-
-void ByteBufferWriter::Construct(const char* bytes, size_t len) {
-  size_ = len;
-  bytes_ = new char[size_];
-
-  if (bytes) {
-    end_ = len;
-    memcpy(bytes_, bytes, end_);
-  } else {
-    end_ = 0;
-  }
-}
-
-ByteBufferWriter::~ByteBufferWriter() {
-  delete[] bytes_;
-}
-
-void ByteBufferWriter::WriteUInt8(uint8_t val) {
-  WriteBytes(reinterpret_cast<const char*>(&val), 1);
-}
-
-void ByteBufferWriter::WriteUInt16(uint16_t val) {
-  uint16_t v = (Order() == ORDER_NETWORK) ? HostToNetwork16(val) : val;
-  WriteBytes(reinterpret_cast<const char*>(&v), 2);
-}
-
-void ByteBufferWriter::WriteUInt24(uint32_t val) {
-  uint32_t v = (Order() == ORDER_NETWORK) ? HostToNetwork32(val) : val;
-  char* start = reinterpret_cast<char*>(&v);
-  if (Order() == ORDER_NETWORK || IsHostBigEndian()) {
-    ++start;
-  }
-  WriteBytes(start, 3);
-}
-
-void ByteBufferWriter::WriteUInt32(uint32_t val) {
-  uint32_t v = (Order() == ORDER_NETWORK) ? HostToNetwork32(val) : val;
-  WriteBytes(reinterpret_cast<const char*>(&v), 4);
-}
-
-void ByteBufferWriter::WriteUInt64(uint64_t val) {
-  uint64_t v = (Order() == ORDER_NETWORK) ? HostToNetwork64(val) : val;
-  WriteBytes(reinterpret_cast<const char*>(&v), 8);
-}
-
-// Serializes an unsigned varint in the format described by
-// https://developers.google.com/protocol-buffers/docs/encoding#varints
-// with the caveat that integers are 64-bit, not 128-bit.
-void ByteBufferWriter::WriteUVarint(uint64_t val) {
-  while (val >= 0x80) {
-    // Write 7 bits at a time, then set the msb to a continuation byte (msb=1).
-    char byte = static_cast<char>(val) | 0x80;
-    WriteBytes(&byte, 1);
-    val >>= 7;
-  }
-  char last_byte = static_cast<char>(val);
-  WriteBytes(&last_byte, 1);
-}
-
-void ByteBufferWriter::WriteString(const std::string& val) {
-  WriteBytes(val.c_str(), val.size());
-}
-
-void ByteBufferWriter::WriteBytes(const char* val, size_t len) {
-  memcpy(ReserveWriteBuffer(len), val, len);
-}
-
-char* ByteBufferWriter::ReserveWriteBuffer(size_t len) {
-  if (Length() + len > Capacity())
-    Resize(Length() + len);
-
-  char* start = bytes_ + end_;
-  end_ += len;
-  return start;
-}
-
-void ByteBufferWriter::Resize(size_t size) {
-  size_t len = std::min(end_, size);
-  if (size > size_) {
-    // Reallocate a larger buffer.
-    size_ = std::max(size, 3 * size_ / 2);
-    char* new_bytes = new char[size_];
-    memcpy(new_bytes, bytes_, len);
-    delete [] bytes_;
-    bytes_ = new_bytes;
-  }
-  end_ = len;
-}
-
-void ByteBufferWriter::Clear() {
-  memset(bytes_, 0, size_);
-  end_ = 0;
-}
-
-
-ByteBufferReader::ByteBufferReader(const char* bytes, size_t len)
-    : ByteBuffer(ORDER_NETWORK) {
-  Construct(bytes, len);
-}
-
-ByteBufferReader::ByteBufferReader(const char* bytes, size_t len,
-                                   ByteOrder byte_order)
-    : ByteBuffer(byte_order) {
-  Construct(bytes, len);
-}
-
-ByteBufferReader::ByteBufferReader(const char* bytes)
-    : ByteBuffer(ORDER_NETWORK) {
-  Construct(bytes, strlen(bytes));
-}
-
-ByteBufferReader::ByteBufferReader(const Buffer& buf)
-    : ByteBuffer(ORDER_NETWORK) {
-  Construct(buf.data<char>(), buf.size());
-}
-
-ByteBufferReader::ByteBufferReader(const ByteBufferWriter& buf)
-    : ByteBuffer(buf.Order()) {
-  Construct(buf.Data(), buf.Length());
-}
-
-void ByteBufferReader::Construct(const char* bytes, size_t len) {
-  bytes_ = bytes;
-  size_ = len;
-  start_ = 0;
-  end_ = len;
-}
-
-bool ByteBufferReader::ReadUInt8(uint8_t* val) {
-  if (!val) return false;
-
-  return ReadBytes(reinterpret_cast<char*>(val), 1);
-}
-
-bool ByteBufferReader::ReadUInt16(uint16_t* val) {
-  if (!val) return false;
-
-  uint16_t v;
-  if (!ReadBytes(reinterpret_cast<char*>(&v), 2)) {
-    return false;
-  } else {
-    *val = (Order() == ORDER_NETWORK) ? NetworkToHost16(v) : v;
-    return true;
-  }
-}
-
-bool ByteBufferReader::ReadUInt24(uint32_t* val) {
-  if (!val) return false;
-
-  uint32_t v = 0;
-  char* read_into = reinterpret_cast<char*>(&v);
-  if (Order() == ORDER_NETWORK || IsHostBigEndian()) {
-    ++read_into;
-  }
-
-  if (!ReadBytes(read_into, 3)) {
-    return false;
-  } else {
-    *val = (Order() == ORDER_NETWORK) ? NetworkToHost32(v) : v;
-    return true;
-  }
-}
-
-bool ByteBufferReader::ReadUInt32(uint32_t* val) {
-  if (!val) return false;
-
-  uint32_t v;
-  if (!ReadBytes(reinterpret_cast<char*>(&v), 4)) {
-    return false;
-  } else {
-    *val = (Order() == ORDER_NETWORK) ? NetworkToHost32(v) : v;
-    return true;
-  }
-}
-
-bool ByteBufferReader::ReadUInt64(uint64_t* val) {
-  if (!val) return false;
-
-  uint64_t v;
-  if (!ReadBytes(reinterpret_cast<char*>(&v), 8)) {
-    return false;
-  } else {
-    *val = (Order() == ORDER_NETWORK) ? NetworkToHost64(v) : v;
-    return true;
-  }
-}
-
-bool ByteBufferReader::ReadUVarint(uint64_t* val) {
-  if (!val) {
-    return false;
-  }
-  // Integers are deserialized 7 bits at a time, with each byte having a
-  // continuation byte (msb=1) if there are more bytes to be read.
-  uint64_t v = 0;
-  for (int i = 0; i < 64; i += 7) {
-    char byte;
-    if (!ReadBytes(&byte, 1)) {
-      return false;
-    }
-    // Read the first 7 bits of the byte, then offset by bits read so far.
-    v |= (static_cast<uint64_t>(byte) & 0x7F) << i;
-    // True if the msb is not a continuation byte.
-    if (static_cast<uint64_t>(byte) < 0x80) {
-      *val = v;
-      return true;
-    }
-  }
-  return false;
-}
-
-bool ByteBufferReader::ReadString(std::string* val, size_t len) {
-  if (!val) return false;
-
-  if (len > Length()) {
-    return false;
-  } else {
-    val->append(bytes_ + start_, len);
-    start_ += len;
-    return true;
-  }
-}
-
-bool ByteBufferReader::ReadBytes(char* val, size_t len) {
-  if (len > Length()) {
-    return false;
-  } else {
-    memcpy(val, bytes_ + start_, len);
-    start_ += len;
-    return true;
-  }
-}
-
-bool ByteBufferReader::Consume(size_t size) {
-  if (size > Length())
-    return false;
-  start_ += size;
-  return true;
-}
-
-}  // namespace rtc