// Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// which accompanies this distribution, and is available

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// Declaration for FileBufferManager class which facilitates the aynchronous compression and 

// decompression of data streams.

// 

//

#ifndef __EZFILEBUFFERMANAGER_H__

#define __EZFILEBUFFERMANAGER_H__

#include <e32base.h>

#include <f32file.h>

#include <ezbufman.h>

/**

Concrete class to manage the input and output buffers for compression and de-compression

@publishedAll

@released

*/

class CEZFileBufferManager : public CBase, public MEZBufferManager

	{

public:

	enum { EBadInitialization = 1 };

public:

	~CEZFileBufferManager();

	IMPORT_C static CEZFileBufferManager* NewLC(RFile &aInput, RFile &aOutput, TInt aBufferSize = 0x8000);

	IMPORT_C static CEZFileBufferManager* NewL(RFile &aInput, RFile &aOutput, TInt aBufferSize = 0x8000);

	void InitializeL(CEZZStream &aZStream);

	void NeedInputL(CEZZStream &aZStream);

	void NeedOutputL(CEZZStream &aZStream);

	void FinalizeL(CEZZStream &aZStream);

protected:

	void ConstructL(TInt aBufferSize);

	CEZFileBufferManager(RFile &aInput, RFile &aOutput);

protected:

	RFile &iInputFile;

	RFile &iOutputFile;

	TInt iBufferSize;

	TUint8* iInputBuffer;

	TUint8* iOutputBuffer;

	TPtr8 iInputDescriptor;  // always points to start of the input Buffer

	TPtr8 iOutputDescriptor; // always points to start of the output Buffer

	};

#endif