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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef REMOTING_PROTOCOL_MESSAGE_DECODER_H_ | 5 #ifndef REMOTING_PROTOCOL_MESSAGE_DECODER_H_ |
6 #define REMOTING_PROTOCOL_MESSAGE_DECODER_H_ | 6 #define REMOTING_PROTOCOL_MESSAGE_DECODER_H_ |
7 | 7 |
8 #include <deque> | 8 #include <deque> |
9 #include <list> | 9 #include <list> |
10 | 10 |
(...skipping 17 matching lines...) Expand all Loading... | |
28 // | message_size | message_data | | 28 // | message_size | message_data | |
29 // +--------------+--------------+ | 29 // +--------------+--------------+ |
30 // | 30 // |
31 // Here, message_size is 4-byte integer that represents size of | 31 // Here, message_size is 4-byte integer that represents size of |
32 // message_data in bytes. message_data - content of the message. | 32 // message_data in bytes. message_data - content of the message. |
33 class MessageDecoder { | 33 class MessageDecoder { |
34 public: | 34 public: |
35 MessageDecoder(); | 35 MessageDecoder(); |
36 virtual ~MessageDecoder(); | 36 virtual ~MessageDecoder(); |
37 | 37 |
38 bool is_buffer_empty() { return buffer_.total_bytes() == 0; } | |
Wez
2015/01/21 01:35:40
Needs a comment to clarify the difference between
Sergey Ulanov
2015/01/29 01:33:29
Done.
| |
39 | |
38 // Add next chunk of data. MessageDecoder retains |data| until all | 40 // Add next chunk of data. MessageDecoder retains |data| until all |
39 // its bytes are consumed. | 41 // its bytes are consumed. |
40 void AddData(scoped_refptr<net::IOBuffer> data, int data_size); | 42 void AddData(scoped_refptr<net::IOBuffer> data, int data_size); |
41 | 43 |
42 // Returns next message from the stream. Ownership of the result is | 44 // Returns next message from the stream. Ownership of the result is |
43 // passed to the caller. Returns nullptr if there are no complete | 45 // passed to the caller. Returns nullptr if there are no complete |
44 // messages yet, otherwise returns a buffer that contains one | 46 // messages yet, otherwise returns a buffer that contains one |
45 // message. | 47 // message. |
46 CompoundBuffer* GetNextMessage(); | 48 CompoundBuffer* GetNextMessage(); |
47 | 49 |
48 private: | 50 private: |
49 // Retrieves the read payload size of the current protocol buffer via |size|. | 51 // Retrieves the read payload size of the current protocol buffer via |size|. |
50 // Returns false and leaves |size| unmodified, if we do not have enough data | 52 // Returns false and leaves |size| unmodified, if we do not have enough data |
51 // to retrieve the current size. | 53 // to retrieve the current size. |
52 bool GetPayloadSize(int* size); | 54 bool GetPayloadSize(int* size); |
53 | 55 |
54 CompoundBuffer buffer_; | 56 CompoundBuffer buffer_; |
55 | 57 |
56 // |next_payload_| stores the size of the next payload if known. | 58 // |next_payload_| stores the size of the next payload if known. |
57 // |next_payload_known_| is true if the size of the next payload is known. | 59 // |next_payload_known_| is true if the size of the next payload is known. |
58 // After one payload is read this is reset to false. | 60 // After one payload is read this is reset to false. |
59 int next_payload_; | 61 int next_payload_; |
60 bool next_payload_known_; | 62 bool next_payload_known_; |
61 }; | 63 }; |
62 | 64 |
63 } // namespace protocol | 65 } // namespace protocol |
64 } // namespace remoting | 66 } // namespace remoting |
65 | 67 |
66 #endif // REMOTING_PROTOCOL_MESSAGE_DECODER_H_ | 68 #endif // REMOTING_PROTOCOL_MESSAGE_DECODER_H_ |
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