williamr@2: // Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).
williamr@2: // All rights reserved.
williamr@2: // This component and the accompanying materials are made available
williamr@4: // under the terms of "Eclipse Public License v1.0"
williamr@2: // which accompanies this distribution, and is available
williamr@4: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
williamr@2: //
williamr@2: // Initial Contributors:
williamr@2: // Nokia Corporation - initial contribution.
williamr@2: //
williamr@2: // Contributors:
williamr@2: //
williamr@2: // Description:
williamr@2: // Declaration for FileBufferManager class which facilitates the aynchronous compression and 
williamr@2: // decompression of data streams.
williamr@2: // 
williamr@2: //
williamr@2: 
williamr@2: #ifndef __EZFILEBUFFERMANAGER_H__
williamr@2: #define __EZFILEBUFFERMANAGER_H__
williamr@2: 
williamr@2: #include <e32base.h>
williamr@2: #include <f32file.h>
williamr@2: 
williamr@2: #include <ezbufman.h>
williamr@2: 
williamr@2: /**
williamr@2: Concrete class to manage the input and output buffers for compression and de-compression
williamr@2: 
williamr@2: @publishedAll
williamr@2: @released
williamr@2: */
williamr@2: class CEZFileBufferManager : public CBase, public MEZBufferManager
williamr@2: 	{
williamr@2: public:
williamr@2: 
williamr@2: 	enum { EBadInitialization = 1 };
williamr@2: 
williamr@2: public:
williamr@2: 	~CEZFileBufferManager();
williamr@2: 	IMPORT_C static CEZFileBufferManager* NewLC(RFile &aInput, RFile &aOutput, TInt aBufferSize = 0x8000);
williamr@2: 	IMPORT_C static CEZFileBufferManager* NewL(RFile &aInput, RFile &aOutput, TInt aBufferSize = 0x8000);
williamr@2: 
williamr@2: 	void InitializeL(CEZZStream &aZStream);
williamr@2: 	void NeedInputL(CEZZStream &aZStream);
williamr@2: 	void NeedOutputL(CEZZStream &aZStream);
williamr@2: 	void FinalizeL(CEZZStream &aZStream);
williamr@2: 
williamr@2: protected:
williamr@2: 	void ConstructL(TInt aBufferSize);
williamr@2: 	CEZFileBufferManager(RFile &aInput, RFile &aOutput);
williamr@2: 
williamr@2: protected:
williamr@2: 	RFile &iInputFile;
williamr@2: 	RFile &iOutputFile;
williamr@2: 	TInt iBufferSize;
williamr@2: 	TUint8* iInputBuffer;
williamr@2: 	TUint8* iOutputBuffer;
williamr@2: 	TPtr8 iInputDescriptor;  // always points to start of the input Buffer
williamr@2: 	TPtr8 iOutputDescriptor; // always points to start of the output Buffer
williamr@2: 	};
williamr@2: 
williamr@2: 
williamr@2: #endif