85 lines
3.2 KiB
Objective-C
85 lines
3.2 KiB
Objective-C
#pragma once
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/****************************************************************************
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Copyright (c) 2009, Radon Labs GmbH
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Copyright (c) 2011-2013,WebJet Business Division,CYOU
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http://www.genesis-3d.com.cn
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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//------------------------------------------------------------------------------
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/**
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@class Net::TcpMessageCodec
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Helperclass that provides function to encode and decode sreams into messages.
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The encoder adds header informations at the beginning of the stream,
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that includes the complete size of the stream. Call EncodeToMessage at the
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sending site.
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The decoder reads sequential incoming streams and append the data
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to an internal buffer. It concatenates the incoming streams to
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a list of streams containing complete messages.
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Call DecodeStream at the receiving site and check for completed messsages
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with GetMessages.
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(C) 2009 Radon Labs
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*/
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#include "io/memorystream.h"
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#include "io/binaryreader.h"
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//------------------------------------------------------------------------------
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namespace Net
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{
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class TcpMessageCodec
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{
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public:
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/// Constructor
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TcpMessageCodec();
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/// Destructor
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virtual ~TcpMessageCodec();
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/// Attachs header information to the stream and returns a copy with header
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void EncodeToMessage(const GPtr<IO::Stream> & stream, const GPtr<IO::Stream> &output);
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/// Decodes a given Stream. Check for HasMessages() if this completes a message.
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void DecodeStream(const GPtr<IO::Stream> & stream);
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/// Returns true, if there are messages in the internal message queue.
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bool HasMessages();
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/// Gets the list of all created messages since the last call of this function
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Util::Array<GPtr<IO::Stream> > DequeueMessages();
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private:
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/// what data is currently expected from the decoder
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enum ReceiveState
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{
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HeaderData,
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MessageData
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};
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ReceiveState receiveState;
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GPtr<IO::Stream> headerStream;
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GPtr<IO::Stream> messageStream;
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SizeT messageSize;
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IndexT headerPosition;
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IndexT messagePostition;
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Util::Array<GPtr<IO::Stream> > completedMessages;
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};
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//------------------------------------------------------------------------------
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} // namespace Net |