Added CompoundBuffer that will be used to store data in the encoding/decoding

remoting/protocol/message_decoder.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_PROTOCOL_MESSAGES_DECODER_H_
 #define REMOTING_PROTOCOL_MESSAGES_DECODER_H_
 
 #include <deque>
 #include <list>
 
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
-#include "google/protobuf/message_lite.h"
-#include "remoting/base/multiple_array_input_stream.h"
+#include "net/base/io_buffer.h"
+#include "remoting/base/compound_buffer.h"
+#include "third_party/protobuf/src/google/protobuf/message_lite.h"
 
 namespace net {
 class DrainableIOBuffer;
 class IOBuffer;
 }  // namespace net
 
 namespace remoting {
 
 class ChromotingClientMessage;
 class ChromotingHostMessage;
 class ClientControlMessage;
 class ClientEventMessage;
 class HostControlMessage;
 class HostEventMessage;
 
-// MessageDecoder uses MultipleArrayInputStream to decode bytes into
-// protocol buffer messages. This can be used to decode bytes received from
-// the network.
+// MessageDecoder uses CompoundBuffer to decode bytes into protocol
+// buffer messages. This can be used to decode bytes received from the
+// network.
 //
 // It provides ParseMessages() which accepts an IOBuffer. If enough bytes
 // are collected to produce protocol buffer messages then the bytes will be
 // consumed and the generated protocol buffer messages are added to the output
 // list.
 //
 // It retains ownership of IOBuffer given to this object and keeps it alive
 // until it is full consumed.
 class MessageDecoder {
  public:
@@ skipping 22 matching lines @@
   }
 
   private:
   // TODO(sergeyu): It might be more efficient to memcopy data to one big buffer
   // instead of storing chunks in dqueue.
   typedef std::deque<scoped_refptr<net::DrainableIOBuffer> > BufferList;
 
   // Parse one message from |buffer_list_|. Return true if sucessful.
   template <class MessageType>
   bool ParseOneMessage(MessageType** message) {
-    scoped_ptr<MultipleArrayInputStream> stream(CreateInputStreamFromData());
-    if (!stream.get())
+    scoped_ptr<CompoundBuffer> buffer(CreateCompoundBufferFromData());
+    if (!buffer.get())
       return false;
 
+    CompoundBufferInputStream stream(buffer.get());
     *message = new MessageType();
-    bool ret = (*message)->ParseFromZeroCopyStream(stream.get());
-    if (!ret) {
+    bool ret = (*message)->ParseFromZeroCopyStream(&stream);
+    if (!ret)
       delete *message;
-    }
     return ret;
   }
 
   void AddBuffer(scoped_refptr<net::IOBuffer> data, int data_size);
 
-  MultipleArrayInputStream* CreateInputStreamFromData();
+  CompoundBuffer* CreateCompoundBufferFromData();
 
   // Retrieves the read payload size of the current protocol buffer via |size|.
   // Returns false and leaves |size| unmodified, if we do not have enough data
   // to retrieve the current size.
   bool GetPayloadSize(int* size);
 
   BufferList buffer_list_;
 
   // The number of bytes in |buffer_list_| not consumed.
   int available_bytes_;
 
   // |next_payload_| stores the size of the next payload if known.
   // |next_payload_known_| is true if the size of the next payload is known.
   // After one payload is read this is reset to false.
   int next_payload_;
   bool next_payload_known_;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_MESSAGES_DECODER_H_