1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/kernelhwsrv/userlibandfileserver/fileserver/shostmassstorage/server/protocol/include/tblocktransfer.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,92 @@
     1.4 +// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of the License "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +/**
    1.20 + @file
    1.21 + @internalTechnology
    1.22 +*/
    1.23 +
    1.24 +#ifndef TBLOCKTRANSFER_H
    1.25 +#define TBLOCKTRANSFER_H
    1.26 +
    1.27 +class MBlockTransferProtocol;
    1.28 +
    1.29 +/**
    1.30 +Split the byte stream on block boundaries and transfer using
    1.31 +MBlockTransferProtocol interface in blocks
    1.32 +*/
    1.33 +class TBlockTransfer
    1.34 +    {
    1.35 +public:
    1.36 +    TBlockTransfer();
    1.37 +
    1.38 +    void InitBuffers(RBuf8* aHeadbuf, RBuf8* aTailbuf);
    1.39 +
    1.40 +    void ReadL(MBlockTransferProtocol& aProtocol,
    1.41 +               TPos aPosition,
    1.42 +               TInt aLength,
    1.43 +               TDes8& aBuf);
    1.44 +
    1.45 +    void WriteL(MBlockTransferProtocol& aProtocol,
    1.46 +                TPos aPosition,
    1.47 +                TInt aLength,
    1.48 +                TDesC8& aBuf);
    1.49 +
    1.50 +    TUint32 BlockLength() const;
    1.51 +    void SetCapacityL(TUint32 aBlockLength, TLba aLastLba);
    1.52 +
    1.53 +private:
    1.54 +    TPos GetHeadBlockOffset(TPos aPos);
    1.55 +    TLba GetHeadBlockLbaL(TPos aPos);
    1.56 +
    1.57 +    TPos GetTailBlockOffset(TPos aPos, TInt aLen);
    1.58 +    TLba GetTailBlockLbaL(TPos aPos, TInt aLen);
    1.59 +
    1.60 +private:
    1.61 +    /** Block Length */
    1.62 +    TInt64 iBlockLength;
    1.63 +    /** Last Logical Block Address */
    1.64 +    TLba iLastLba;
    1.65 +
    1.66 +    // buffers for block manipulation (not owend by this class)
    1.67 +    RBuf8* iHeadbuf;
    1.68 +	RBuf8* iTailbuf;
    1.69 +    };
    1.70 +
    1.71 +
    1.72 +/** Constructor */
    1.73 +inline TBlockTransfer::TBlockTransfer()
    1.74 +:   iBlockLength(0),
    1.75 +    iHeadbuf(NULL),
    1.76 +    iTailbuf(NULL)
    1.77 +    {
    1.78 +    }
    1.79 +
    1.80 +
    1.81 +/** return the Block Length */
    1.82 +inline TUint32 TBlockTransfer::BlockLength() const
    1.83 +    {
    1.84 +    return iBlockLength;
    1.85 +    }
    1.86 +
    1.87 +
    1.88 +inline void TBlockTransfer::InitBuffers(RBuf8* aHeadbuf, RBuf8* aTailbuf)
    1.89 +    {
    1.90 +    iHeadbuf = aHeadbuf;
    1.91 +    iTailbuf = aTailbuf;
    1.92 +    }
    1.93 +
    1.94 +#endif // TBLOCKTRANSFER_H
    1.95 +