1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/persistentdata/persistentstorage/store/INC/S32HUF.H	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,106 @@
     1.4 +// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#if !defined(__S32HUF_H__)
    1.20 +#define __S32HUF_H__
    1.21 +#if !defined(__S32BUF_H__)
    1.22 +#include <s32buf.h>
    1.23 +#endif
    1.24 +#if !defined(__S32STRM_H__)
    1.25 +#include <s32strm.h>
    1.26 +#endif
    1.27 +
    1.28 +class Huffman // Huffman primitives: sell to base
    1.29 +	{
    1.30 +public:
    1.31 +	IMPORT_C static const TUint* DefaultBits(); // long code needs to be sorted out
    1.32 +	IMPORT_C static const TUint8* DefaultTree(); // is there a real case for default tables?
    1.33 +//
    1.34 +	IMPORT_C void Encode(...); // incremental encoding and decoding primitives
    1.35 +	IMPORT_C void Decode(...); // suitable for sharing between descriptors and filters
    1.36 +	};
    1.37 +//
    1.38 +class THufEncodeFilter : public TStreamFilter
    1.39 +	{
    1.40 +public:
    1.41 +	IMPORT_C THufEncodeFilter();
    1.42 +	IMPORT_C void Set(MStreamBuf* aHost,const TUint* aHufBits,TInt aMode=EWrite);
    1.43 +protected:
    1.44 +	IMPORT_C TInt Capacity(TInt aMaxLength);
    1.45 +	IMPORT_C TInt FilterL(TAny* aPtr,TInt aMaxLength,const TUint8*& aFrom,const TUint8* anEnd);
    1.46 +	IMPORT_C void DoSynchL();
    1.47 +private:
    1.48 +	const TUint* iTable;
    1.49 +	TInt iMaxBits;
    1.50 +	TUint iOut;
    1.51 +	TInt iBit;
    1.52 +	};
    1.53 +class THufDecodeFilter : public TStreamFilter
    1.54 +	{
    1.55 +public:
    1.56 +	IMPORT_C THufDecodeFilter();
    1.57 +	IMPORT_C void Set(MStreamBuf* aHost,const TUint8* aHufTree,TInt aMode=ERead);
    1.58 +protected:
    1.59 +	IMPORT_C TInt Capacity(TInt aMaxLength);
    1.60 +	IMPORT_C TInt FilterL(TAny* aPtr,TInt aMaxLength,const TUint8*& aFrom,const TUint8* anEnd);
    1.61 +	IMPORT_C void DoSynchL();
    1.62 +private:
    1.63 +	const TUint8* iRoot;
    1.64 +	const TUint8* iNode;
    1.65 +	TUint iBits;
    1.66 +	};
    1.67 +//
    1.68 +class RHufDecodeReadStream : public RReadStream
    1.69 +	{
    1.70 +public:
    1.71 +	RHufDecodeReadStream() {}
    1.72 +	IMPORT_C RHufDecodeReadStream(RReadStream& aHost,const TUint8* aHufTree=Huffman::DefaultTree());
    1.73 +	IMPORT_C void Open(RReadStream& aHost,const TUint8* aHufTree=Huffman::DefaultTree());
    1.74 +private:
    1.75 +	THufDecodeFilter iFilter;
    1.76 +	};
    1.77 +class RHufEncodeWriteStream : public RWriteStream
    1.78 +	{
    1.79 +public:
    1.80 +	RHufEncodeWriteStream() {}
    1.81 +	inline RHufEncodeWriteStream(const MExternalizer<TStreamRef>& anExter);
    1.82 +	IMPORT_C RHufEncodeWriteStream(RWriteStream& aHost,const TUint* aHufBits=Huffman::DefaultBits());
    1.83 +	IMPORT_C void Open(RWriteStream& aHost,const TUint* aHufBits=Huffman::DefaultBits());
    1.84 +private:
    1.85 +	THufEncodeFilter iFilter;
    1.86 +	};
    1.87 +//
    1.88 +class RHufEncodeReadStream : public RReadStream
    1.89 +	{
    1.90 +public:
    1.91 +	RHufEncodeReadStream() {}
    1.92 +	IMPORT_C RHufEncodeReadStream(RReadStream& aHost,const TUint* aHufBits=Huffman::DefaultBits());
    1.93 +	IMPORT_C void Open(RReadStream& aHost,const TUint* aHufBits=Huffman::DefaultBits());
    1.94 +private:
    1.95 +	THufEncodeFilter iFilter;
    1.96 +	};
    1.97 +class RHufDecodeWriteStream : public RWriteStream
    1.98 +	{
    1.99 +public:
   1.100 +	RHufDecodeWriteStream() {}
   1.101 +	inline RHufDecodeWriteStream(const MExternalizer<TStreamRef>& anExter);
   1.102 +	IMPORT_C RHufDecodeWriteStream(RWriteStream& aHost,const TUint8* aHufTree=Huffman::DefaultTree());
   1.103 +	IMPORT_C void Open(RWriteStream& aHost,const TUint8* aHufTree=Huffman::DefaultTree());
   1.104 +private:
   1.105 +	THufDecodeFilter iFilter;
   1.106 +	};
   1.107 +
   1.108 +#include "S32HUF.INL"
   1.109 +#endif