1 files changed, 160 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/byte_buffer.cc b/third_party/libwebrtc/rtc_base/byte_buffer.cc
new file mode 100644
index 0000000000..e1278337a4
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/byte_buffer.cc
@@ -0,0 +1,160 @@
+/*
+ *  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 "rtc_base/byte_buffer.h"
+
+#include <string.h>
+
+namespace rtc {
+
+ByteBufferWriter::ByteBufferWriter() : ByteBufferWriterT() {}
+
+ByteBufferWriter::ByteBufferWriter(const char* bytes, size_t len)
+    : ByteBufferWriterT(bytes, len) {}
+
+ByteBufferReader::ByteBufferReader(const char* bytes, size_t len) {
+  Construct(bytes, len);
+}
+
+ByteBufferReader::ByteBufferReader(const char* bytes) {
+  Construct(bytes, strlen(bytes));
+}
+
+ByteBufferReader::ByteBufferReader(const Buffer& buf) {
+  Construct(buf.data<char>(), buf.size());
+}
+
+ByteBufferReader::ByteBufferReader(const ByteBufferWriter& buf) {
+  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 = NetworkToHost16(v);
+    return true;
+  }
+}
+
+bool ByteBufferReader::ReadUInt24(uint32_t* val) {
+  if (!val)
+    return false;
+
+  uint32_t v = 0;
+  char* read_into = reinterpret_cast<char*>(&v);
+  ++read_into;
+
+  if (!ReadBytes(read_into, 3)) {
+    return false;
+  } else {
+    *val = NetworkToHost32(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 = NetworkToHost32(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 = NetworkToHost64(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