// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// @internalComponent

// @prototype

//

#ifndef GZIPBUFMGR_H

#define GZIPBUFMGR_H

//-----------------------------------------------------------------------------

#include <e32base.h>

#include <ezbufman.h>

#include <ezgzip.h>

#include <s32mem.h>

//-----------------------------------------------------------------------------

class CGzipStream;

class RMemReadStream;

//-----------------------------------------------------------------------------

class GZipBufMgr : public MEZBufferManager

    {

    public:

        // Constructor and Destructor

        static GZipBufMgr* NewL(TPtrC8 in);

        virtual ~GZipBufMgr();

        // Overridden virtual methods from MEZBufferManager

        void InitializeL(CEZZStream &aZStream);

        void NeedInputL(CEZZStream &aZStream);

        void NeedOutputL(CEZZStream &aZStream);

        void FinalizeL(CEZZStream &aZStream);

        // Public methods

        void ReadGZipHeaderL(TEZGZipHeader& aHeader);

        void ReadStringIntoDescriptorL(RMemReadStream& aMem, HBufC8 **aDes) const;

        void SetGZipBuffer(TPtrC8 data);

    private:

        void ConstructL();

        GZipBufMgr(TPtrC8 in);

        // Always points to start of the input Buffer

        TPtrC8	iInput;

        // Always points to start of the output Buffer

        TPtr8	iOutputDes;

        HBufC8*	iOutput;

        // Used by the virtual methods from MEZBufferManager

        TBool	iNeedInput;

        TBool	iNeedOutput;

        TBool	iFinalized;

        // Marks the start of the data, after the header

        TUint   iOffset;

        // Magic GZip numbers

        TUint8  iID1;

        TUint8  iID2;

    };

#endif // GZIPBUFMGR_H