1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 * 

    14 * Description:

    15 *

    16 */

    17 

    18 #ifndef __INFLATE_H__

    19 #define __INFLATE_H__

    20 

    21 #include "e32defwrap.h"

    22 #include "huffman.h"

    23 

    24 

    25 const TInt KDeflateMinLength=3;

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

    27 const TInt KDeflateDistCodeBase=0x200;

    28 

    29 /**

    30 Class for inflater

    31 @internalComponent

    32 @released

    33 */

    34 class CInflater

    35 {

    36 	public:

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

    38 	public:

    39 		static CInflater* NewLC(TBitInput& aInput);

    40 		~CInflater();

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

    42 		TInt SkipL(TInt aLength);

    43 	private:

    44 		CInflater(TBitInput& aInput);

    45 		void ConstructL();

    46 		void InitL();

    47 		TInt InflateL();

    48 	private:

    49 		TBitInput* iBits;

    50 		const TUint8* iRptr;			// partial segment

    51 		TInt iLen;

    52 		const TUint8* iAvail;			// available data

    53 		const TUint8* iLimit;

    54 		TEncoding* iEncoding;

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

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

    57 };

    58 

    59 #endif

    60