1 // Copyright (c) 2006-2009 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 // Interface class describing class that may be used as

    15 // output stream for dom tree

    16 //

    17 

    18 

    19 

    20 /**

    21  @file

    22  @internalComponent

    23  @prototype

    24 */

    25 #ifndef XMLENGCGZIPFILEOUTPUTSTREAM_H

    26 #define XMLENGCGZIPFILEOUTPUTSTREAM_H

    27 

    28 #include <xml/dom/xmlengoutputstream.h>

    29 #include <ezbufman.h>   //MEZBufferManager

    30 

    31 #include <ezgzip.h>     //TEZGZipHeader

    32 class CEZCompressor;

    33 

    34 

    35 

    36 class CXmlEngGZIPFileOutputStream : public CBase, public MXmlEngOutputStream, 

    37                                     public MEZBufferManager

    38 {

    39 public:

    40     static CXmlEngGZIPFileOutputStream* NewLC(RFile& aOutputFile, RFs& aRFs);

    41     static CXmlEngGZIPFileOutputStream* NewL(RFile& aOutputFile, RFs& aRFs);

    42     ~CXmlEngGZIPFileOutputStream();

    43     TInt CheckError();

    44 		

    45     TInt Write( const TDesC8& aBuffer );

    46     TInt Close();

    47 

    48     /**

    49      * Implementation of MEZBufferManager interface.

    50      */

    51      void InitializeL(CEZZStream& aZStream);

    52      void NeedInputL(CEZZStream& aZStream);

    53      void NeedOutputL(CEZZStream& aZStream);

    54      void FinalizeL(CEZZStream& aZStream);

    55 

    56 protected:

    57     CXmlEngGZIPFileOutputStream(RFile& aOutputFile, RFs& aRFs);

    58     void ConstructL();

    59 

    60 private:

    61     void WriteL(const TDesC8& aBuffer);

    62     void CloseL();

    63 			

    64 private:

    65     TInt iError;

    66 	    

    67     /**

    68      * Default input buffers size.

    69      */

    70     static const TInt KDefaultInputBufferSize;

    71 	    

    72     /**

    73      * Output buffer size. It determines, how often output data will be written

    74      * to disk. (it's written to disk, when buffer is full.

    75      *

    76      */

    77     

    78     

    79     static const TInt KOutputBufferSize;

    80 	    

    81     RBuf8 iOutputDescriptor;

    82     RBuf8 iInputDescriptor;

    83     RBuf8 iOldInputDescriptor;

    84 	    

    85     /**

    86      * Engine of GZiping

    87      */

    88     CEZCompressor* iCompressor;

    89     TInt32 iCrc;

    90     TEZGZipHeader iHeader;

    91     TInt iUncompressedDataSize;

    92     RFile iOutputFile;

    93     RFs   iRFs;

    94     

    95     /**

    96      * State of the object.

    97      */

    98     TBool iNoInputNeeded;

    99     TBool iKeepGoing;

   100     TBool iCloseInvoked;

   101 	    

   102 }; 

   103 

   104 

   105 

   106 #endif /* XMLENGCGZIPFILEOUTPUTSTREAM_H */