--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/store/INC/S32HUF.H	Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,106 @@
+// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#if !defined(__S32HUF_H__)
+#define __S32HUF_H__
+#if !defined(__S32BUF_H__)
+#include <s32buf.h>
+#endif
+#if !defined(__S32STRM_H__)
+#include <s32strm.h>
+#endif
+
+class Huffman // Huffman primitives: sell to base
+	{
+public:
+	IMPORT_C static const TUint* DefaultBits(); // long code needs to be sorted out
+	IMPORT_C static const TUint8* DefaultTree(); // is there a real case for default tables?
+//
+	IMPORT_C void Encode(...); // incremental encoding and decoding primitives
+	IMPORT_C void Decode(...); // suitable for sharing between descriptors and filters
+	};
+//
+class THufEncodeFilter : public TStreamFilter
+	{
+public:
+	IMPORT_C THufEncodeFilter();
+	IMPORT_C void Set(MStreamBuf* aHost,const TUint* aHufBits,TInt aMode=EWrite);
+protected:
+	IMPORT_C TInt Capacity(TInt aMaxLength);
+	IMPORT_C TInt FilterL(TAny* aPtr,TInt aMaxLength,const TUint8*& aFrom,const TUint8* anEnd);
+	IMPORT_C void DoSynchL();
+private:
+	const TUint* iTable;
+	TInt iMaxBits;
+	TUint iOut;
+	TInt iBit;
+	};
+class THufDecodeFilter : public TStreamFilter
+	{
+public:
+	IMPORT_C THufDecodeFilter();
+	IMPORT_C void Set(MStreamBuf* aHost,const TUint8* aHufTree,TInt aMode=ERead);
+protected:
+	IMPORT_C TInt Capacity(TInt aMaxLength);
+	IMPORT_C TInt FilterL(TAny* aPtr,TInt aMaxLength,const TUint8*& aFrom,const TUint8* anEnd);
+	IMPORT_C void DoSynchL();
+private:
+	const TUint8* iRoot;
+	const TUint8* iNode;
+	TUint iBits;
+	};
+//
+class RHufDecodeReadStream : public RReadStream
+	{
+public:
+	RHufDecodeReadStream() {}
+	IMPORT_C RHufDecodeReadStream(RReadStream& aHost,const TUint8* aHufTree=Huffman::DefaultTree());
+	IMPORT_C void Open(RReadStream& aHost,const TUint8* aHufTree=Huffman::DefaultTree());
+private:
+	THufDecodeFilter iFilter;
+	};
+class RHufEncodeWriteStream : public RWriteStream
+	{
+public:
+	RHufEncodeWriteStream() {}
+	inline RHufEncodeWriteStream(const MExternalizer<TStreamRef>& anExter);
+	IMPORT_C RHufEncodeWriteStream(RWriteStream& aHost,const TUint* aHufBits=Huffman::DefaultBits());
+	IMPORT_C void Open(RWriteStream& aHost,const TUint* aHufBits=Huffman::DefaultBits());
+private:
+	THufEncodeFilter iFilter;
+	};
+//
+class RHufEncodeReadStream : public RReadStream
+	{
+public:
+	RHufEncodeReadStream() {}
+	IMPORT_C RHufEncodeReadStream(RReadStream& aHost,const TUint* aHufBits=Huffman::DefaultBits());
+	IMPORT_C void Open(RReadStream& aHost,const TUint* aHufBits=Huffman::DefaultBits());
+private:
+	THufEncodeFilter iFilter;
+	};
+class RHufDecodeWriteStream : public RWriteStream
+	{
+public:
+	RHufDecodeWriteStream() {}
+	inline RHufDecodeWriteStream(const MExternalizer<TStreamRef>& anExter);
+	IMPORT_C RHufDecodeWriteStream(RWriteStream& aHost,const TUint8* aHufTree=Huffman::DefaultTree());
+	IMPORT_C void Open(RWriteStream& aHost,const TUint8* aHufTree=Huffman::DefaultTree());
+private:
+	THufDecodeFilter iFilter;
+	};
+
+#include "S32HUF.INL"
+#endif