1 // Copyright (c) 2004-2009 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 // Class for inflater

    15 // @internalComponent

    16 // @released

    17 // 

    18 //

    19 

    20 #ifndef __INFLATE_H__

    21 #define __INFLATE_H__

    22 

    23 #include "e32defwrap.h"

    24 #include "huffman.h"

    25 

    26 

    27 const TInt KDeflateMinLength=3;

    28 const TInt KDeflateMaxDistance=(1<<KDeflateDistanceMag);

    29 const TInt KDeflateDistCodeBase=0x200;

    30 

    31 /**

    32 Class for inflater

    33 @internalComponent

    34 @released

    35 */

    36 class CInflater

    37 {

    38 	public:

    39 		enum {EBufSize = 0x800, ESafetyZone=8};

    40 	public:

    41 		static CInflater* NewLC(TBitInput& aInput);

    42 		~CInflater();

    43 		TInt ReadL(TUint8* aBuffer,TInt aLength);

    44 		TInt SkipL(TInt aLength);

    45 	private:

    46 		CInflater(TBitInput& aInput);

    47 		void ConstructL();

    48 		void InitL();

    49 		TInt InflateL();

    50 	private:

    51 		TBitInput* iBits;

    52 		const TUint8* iRptr;			// partial segment

    53 		TInt iLen;

    54 		const TUint8* iAvail;			// available data

    55 		const TUint8* iLimit;

    56 		TEncoding* iEncoding;

    57 		TUint8* iOut;					// circular buffer for distance matches

    58 		TUint8 iHuff[EBufSize+ESafetyZone];	// huffman data

    59 };

    60 

    61 

    62 #endif

    63