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// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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/**
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@file
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@internalTechnology
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*/
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#ifndef TBLOCKTRANSFER_H
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#define TBLOCKTRANSFER_H
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class MBlockTransferProtocol;
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/**
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Split the byte stream on block boundaries and transfer using
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MBlockTransferProtocol interface in blocks
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*/
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class TBlockTransfer
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{
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public:
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TBlockTransfer();
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void InitBuffers(RBuf8* aHeadbuf, RBuf8* aTailbuf);
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void ReadL(MBlockTransferProtocol& aProtocol,
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TPos aPosition,
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TInt aLength,
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TDes8& aBuf);
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void WriteL(MBlockTransferProtocol& aProtocol,
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TPos aPosition,
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TInt aLength,
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TDesC8& aBuf);
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TUint32 BlockLength() const;
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void SetCapacityL(TUint32 aBlockLength, TLba aLastLba);
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private:
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TPos GetHeadBlockOffset(TPos aPos);
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TLba GetHeadBlockLbaL(TPos aPos);
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TPos GetTailBlockOffset(TPos aPos, TInt aLen);
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TLba GetTailBlockLbaL(TPos aPos, TInt aLen);
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private:
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/** Block Length */
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TInt64 iBlockLength;
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/** Last Logical Block Address */
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TLba iLastLba;
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// buffers for block manipulation (not owend by this class)
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RBuf8* iHeadbuf;
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RBuf8* iTailbuf;
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};
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/** Constructor */
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inline TBlockTransfer::TBlockTransfer()
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: iBlockLength(0),
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iHeadbuf(NULL),
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iTailbuf(NULL)
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{
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}
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/** return the Block Length */
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inline TUint32 TBlockTransfer::BlockLength() const
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{
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return iBlockLength;
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}
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inline void TBlockTransfer::InitBuffers(RBuf8* aHeadbuf, RBuf8* aTailbuf)
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{
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iHeadbuf = aHeadbuf;
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iTailbuf = aTailbuf;
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}
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#endif // TBLOCKTRANSFER_H
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