sl@0: // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // @internalComponent
sl@0: // @prototype
sl@0: //
sl@0: 
sl@0: #ifndef GZIPBUFMGR_H
sl@0: #define GZIPBUFMGR_H
sl@0: 
sl@0: //-----------------------------------------------------------------------------
sl@0: #include <e32base.h>
sl@0: #include <ezbufman.h>
sl@0: #include <ezgzip.h>
sl@0: #include <s32mem.h>
sl@0: 
sl@0: //-----------------------------------------------------------------------------
sl@0: class CGzipStream;
sl@0: class RMemReadStream;
sl@0: 
sl@0: //-----------------------------------------------------------------------------
sl@0: class GZipBufMgr : public MEZBufferManager
sl@0:     {
sl@0:     public:
sl@0:         // Constructor and Destructor
sl@0:         static GZipBufMgr* NewL(TPtrC8 in);
sl@0:         virtual ~GZipBufMgr();
sl@0: 
sl@0:         // Overridden virtual methods from MEZBufferManager
sl@0:         void InitializeL(CEZZStream &aZStream);
sl@0:         void NeedInputL(CEZZStream &aZStream);
sl@0:         void NeedOutputL(CEZZStream &aZStream);
sl@0:         void FinalizeL(CEZZStream &aZStream);
sl@0:         
sl@0:         // Public methods
sl@0:         void ReadGZipHeaderL(TEZGZipHeader& aHeader);
sl@0:         void ReadStringIntoDescriptorL(RMemReadStream& aMem, HBufC8 **aDes) const;
sl@0:         void SetGZipBuffer(TPtrC8 data);
sl@0: 
sl@0:     private:
sl@0:         void ConstructL();
sl@0:         GZipBufMgr(TPtrC8 in);
sl@0: 
sl@0:         // Always points to start of the input Buffer
sl@0:         TPtrC8	iInput;
sl@0: 
sl@0:         // Always points to start of the output Buffer
sl@0:         TPtr8	iOutputDes;
sl@0:         HBufC8*	iOutput;
sl@0:         
sl@0:         // Used by the virtual methods from MEZBufferManager
sl@0:         TBool	iNeedInput;
sl@0:         TBool	iNeedOutput;
sl@0:         TBool	iFinalized;
sl@0: 
sl@0:         // Marks the start of the data, after the header
sl@0:         TUint   iOffset;
sl@0: 
sl@0:         // Magic GZip numbers
sl@0:         TUint8  iID1;
sl@0:         TUint8  iID2;
sl@0:     };
sl@0: 
sl@0: #endif // GZIPBUFMGR_H