1 ezfilebuffer.h

     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 the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // EZLib: FILEBUFFER.H

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

    16 // decompression of data streams.

    17 // 

    18 //

    19 

    20 #ifndef __EZFILEBUFFERMANAGER_H__

    21 #define __EZFILEBUFFERMANAGER_H__

    22 

    23 #include <e32base.h>

    24 #include <f32file.h>

    25 

    26 #include <ezbufman.h>

    27 

    28 /**

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

    30 

    31 @publishedAll

    32 @released

    33 */

    34 class CEZFileBufferManager : public CBase, public MEZBufferManager

    35 	{

    36 public:

    37 

    38 	enum { EBadInitialization = 1 };

    39 

    40 public:

    41 	~CEZFileBufferManager();

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

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

    44 

    45 	void InitializeL(CEZZStream &aZStream);

    46 	void NeedInputL(CEZZStream &aZStream);

    47 	void NeedOutputL(CEZZStream &aZStream);

    48 	void FinalizeL(CEZZStream &aZStream);

    49 

    50 protected:

    51 	void ConstructL(TInt aBufferSize);

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

    53 

    54 protected:

    55 	RFile &iInputFile;

    56 	RFile &iOutputFile;

    57 	TInt iBufferSize;

    58 	TUint8* iInputBuffer;

    59 	TUint8* iOutputBuffer;

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

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

    62 	};

    63 

    64 

    65 #endif