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

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

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

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

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

    15 // decompression of data streams.

    16 // 

    17 //

    18 

    19 #ifndef __EZFILEBUFFERMANAGER_H__

    20 #define __EZFILEBUFFERMANAGER_H__

    21 

    22 #include <e32base.h>

    23 #include <f32file.h>

    24 

    25 #include <ezbufman.h>

    26 

    27 /**

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

    29 

    30 @publishedAll

    31 @released

    32 */

    33 class CEZFileBufferManager : public CBase, public MEZBufferManager

    34 	{

    35 public:

    36 

    37 	enum { EBadInitialization = 1 };

    38 

    39 public:

    40 	~CEZFileBufferManager();

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

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

    43 

    44 	void InitializeL(CEZZStream &aZStream);

    45 	void NeedInputL(CEZZStream &aZStream);

    46 	void NeedOutputL(CEZZStream &aZStream);

    47 	void FinalizeL(CEZZStream &aZStream);

    48 

    49 protected:

    50 	void ConstructL(TInt aBufferSize);

    51 	CEZFileBufferManager(RFile &aInput, RFile &aOutput);

    52 

    53 protected:

    54 	RFile &iInputFile;

    55 	RFile &iOutputFile;

    56 	TInt iBufferSize;

    57 	TUint8* iInputBuffer;

    58 	TUint8* iOutputBuffer;

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

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

    61 	};

    62 

    63 

    64 #endif