1 /* 2 * Copyright 2018 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef RTC_BASE_MESSAGE_BUFFER_READER_H_ 12 #define RTC_BASE_MESSAGE_BUFFER_READER_H_ 13 14 #include "rtc_base/byte_buffer.h" 15 16 namespace webrtc { 17 18 // A simple subclass of the ByteBufferReader that exposes the starting address 19 // of the message and its length, so that we can recall previously parsed data. 20 class MessageBufferReader : public rtc::ByteBufferReader { 21 public: MessageBufferReader(const char * bytes,size_t len)22 MessageBufferReader(const char* bytes, size_t len) 23 : rtc::ByteBufferReader(bytes, len) {} 24 ~MessageBufferReader() = default; 25 26 // Starting address of the message. MessageData()27 const char* MessageData() const { return bytes_; } 28 // Total length of the message. Note that this is different from Length(), 29 // which is the length of the remaining message from the current offset. MessageLength()30 size_t MessageLength() const { return size_; } 31 // Current offset in the message. CurrentOffset()32 size_t CurrentOffset() const { return start_; } 33 }; 34 35 } // namespace webrtc 36 37 #endif // RTC_BASE_MESSAGE_BUFFER_READER_H_ 38