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 CEZStream class.  

    15 // 

    16 //

    17 

    18 #ifndef __EZZSTREAM_H__

    19 #define __EZZSTREAM_H__

    20 

    21 #include <e32base.h>

    22 #include <ezlib.h> 

    23 #include <ezliberrorcodes.h>

    24 

    25 /**

    26 Represents a zip stream

    27 

    28 @publishedAll

    29 @released

    30 */

    31 class CEZZStream : public CBase

    32 	{

    33 public:

    34 /** stream panic values */

    35 	enum 

    36 		{

    37 		EStreamError = -Z_STREAM_ERROR,

    38 		EDataError = -Z_DATA_ERROR,

    39 		EBufError = -Z_BUF_ERROR,

    40 		EVersionError = -Z_VERSION_ERROR,

    41 		EUnexpected

    42 		};

    43 public:

    44 	IMPORT_C void SetInput(const TDesC8& aInputData);

    45 	IMPORT_C void SetOutput(TDes8& aOutputData);

    46 

    47 	IMPORT_C TPtrC8 OutputDescriptor() const;

    48 	IMPORT_C TInt TotalOut() const;

    49 	IMPORT_C TInt TotalIn() const;

    50 	IMPORT_C TInt32 Adler32() const;

    51 	IMPORT_C TInt AvailIn() const;

    52 	IMPORT_C TInt AvailOut() const;

    53 

    54 	IMPORT_C TInt Progress(TInt aTotalLength) const;

    55 	

    56 protected:

    57 	CEZZStream();

    58 

    59 	

    60 protected:

    61 	z_stream iStream;

    62 

    63 	// This pointer is reset every time SetOutput is called.  It maintains a pointer to the

    64 	// start of the output buffer which is being written to.  We cannot use iStream.next_out,

    65 	// because zlib will modifify this during its deflate and inflate.

    66 	

    67 	TUint8* iOutputPointer;

    68 	TInt iOutputBufferLength;

    69 	};

    70 

    71 #endif