--- a/epoc32/include/ezcompressor.h	Tue Nov 24 13:55:44 2009 +0000
+++ b/epoc32/include/ezcompressor.h	Tue Mar 16 16:12:26 2010 +0000
@@ -1,1 +1,119 @@
-ezcompressor.h
+// Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
+// which accompanies this distribution, and is available
+// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// EZLib: COMPRESSOR.H
+// Declaration for Compression class
+// 
+//
+
+#ifndef __EZCOMPRESSOR_H__
+#define __EZCOMPRESSOR_H__
+
+#include <e32base.h>
+#include <ezstream.h>
+#include <ezbufman.h>
+
+/**
+The CEZCompressor class provides in-memory compression functions, including integrity checks of the uncompressed data.
+This version of the library supports only one compression method (deflation).  Compression can be done in a single step
+(using CompressL()) if the buffers are large enough (for example if an input file is mmap'ed), or can be done by repeated calls
+of the DeflateL() function.  The source data is compressed to the target buffer (both source and target contained within 
+the buffer manager argument), and various other arguments distinguish the different compression settings.
+
+@publishedAll
+@released
+*/
+class CEZCompressor : public CEZZStream
+	{
+public:
+	/** Compression strategy - used to tune the compression algorithm */
+	enum TStrategy
+		{
+		/** Use for normal data */		
+		EDefaultStrategy = Z_DEFAULT_STRATEGY, 
+		
+		/** Force Huffman encoding only (no string match) */
+		EFiltered = Z_FILTERED, 
+		
+		/** Use for data produced by a filter (or predictor) */
+		EHuffmanOnly = Z_HUFFMAN_ONLY
+		};
+
+	/** Compression levels */
+	enum 
+		{
+		EDefaultCompression = Z_DEFAULT_COMPRESSION,
+		ENoCompression = Z_NO_COMPRESSION,
+		EBestSpeed = Z_BEST_SPEED,
+		EBestCompression = Z_BEST_COMPRESSION
+		};
+
+	/** Window Bits - the base two logarithm of the window size (the size of the history buffer) */
+	enum
+		{
+		EMaxWBits = MAX_WBITS
+		};
+
+	/** Memory level - specifies how much memory should be allocated for the internal compression state */
+	enum
+		{
+		EDefMemLevel = MAX_MEM_LEVEL
+		};
+
+	/** Compression panic values */
+	enum
+		{
+		EDeflateInitlialiserError = EUnexpected + 1,
+		EDeflateTerminated
+		};
+
+	public:
+		~CEZCompressor();
+
+		IMPORT_C static CEZCompressor* NewLC(MEZBufferManager& aInit, TInt aLevel = EDefaultCompression,
+			TInt aWindowBits = EMaxWBits, TInt aMemLevel = EDefMemLevel, TStrategy aStrategy = EDefaultStrategy);
+		IMPORT_C static CEZCompressor* NewL(MEZBufferManager& aInit, TInt aLevel = EDefaultCompression,
+			TInt aWindowBits = EMaxWBits, TInt aMemLevel = EDefMemLevel, TStrategy aStrategy = EDefaultStrategy);
+		IMPORT_C static CEZCompressor* NewLC(MEZBufferManager& aInit, const TDesC8 &aDictionary, 
+			TInt aLevel = EDefaultCompression, TInt aWindowBits = EMaxWBits, TInt aMemLevel = EDefMemLevel, 
+			TStrategy aStrategy = EDefaultStrategy);
+		IMPORT_C static CEZCompressor* NewL(MEZBufferManager& aInit, const TDesC8 &aDictionary,  
+			TInt aLevel = EDefaultCompression, TInt aWindowBits = EMaxWBits, TInt aMemLevel = EDefMemLevel, 
+			TStrategy aStrategy = EDefaultStrategy);
+
+		IMPORT_C void ResetL(MEZBufferManager& aInit);
+
+		IMPORT_C TBool DeflateL();
+
+		IMPORT_C static void CompressL(TDes8 &aDestination, const TDesC8 &aSource, TInt aLevel = EDefaultCompression);
+
+	private:
+		enum TDeflationState
+			{
+			ENoFlush,
+			EFinish,
+			EFinalize,
+			ETerminated
+			};
+
+	private:
+		CEZCompressor(MEZBufferManager* aInit);
+		void ConstructL(TInt aLevel, const TUint8* aDictionary, TInt aLength, TInt aWindowBits, TInt aMemLevel, TStrategy aStrategy);
+		void ConstructL(TInt aLevel, TInt aWindowBits, TInt aMemLevel, TStrategy aStrategy);
+
+	private:
+		MEZBufferManager* iBufferInit;
+		TDeflationState iDeflationState;
+	};
+
+#endif