134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 2000.
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//
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// File: PLANG.HXX
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//
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// Contents: Protocols used in language dependent filter pipeline
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//
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// Classes: PNoiseList, PKeyRepository
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//
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// History: 15-Jul-91 BartoszM Created
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//
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// Notes: The language dependent filtering pipeline.
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// The filter sees it encapsulated in the form of
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// DataRepository protocol which hides the
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// (language dependent) Key Maker and Value Normalizer
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// The input driven pipeline consists of:
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//
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// Word Breaker
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// Stemmer (optional)
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// Normalizer (protocol PWordRepository)
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// Noise List
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// Key Repository (the final sink for keys)
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include <pfilter.hxx>
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class CFullPropSpec;
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class CStorageVariant;
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class CDataRepository;
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// Gap in occurrence number for phrase breaks.
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const int iOccPhraseGap = 7;
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//+---------------------------------------------------------------------------
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//
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// Class: PNoiseList
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//
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// Purpose: Filtering pipeline stage between word repository
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// and Key repository.
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// Discard most frequent words from the input stream
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//
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// History: 02-May-91 BartoszM Created stub.
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// 15-Jul-91 BartoszM converted to protocol
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//
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//----------------------------------------------------------------------------
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class PNoiseList
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{
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public:
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virtual void GetBuffers( unsigned** ppcbInBuf, BYTE** ppbInBuf ) = 0;
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virtual void GetFlags ( BOOL** ppRange, CI_RANK** ppRank )
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{
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*ppRange = 0;
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*ppRank = 0;
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}
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virtual void PutAltWord( unsigned hash ) = 0;
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virtual void PutWord( unsigned hash ) = 0;
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virtual void StartAltPhrase() { }
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virtual void EndAltPhrase() { }
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virtual void SkipNoiseWords( ULONG cWords) { }
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virtual void SetOccurrence( OCCURRENCE occ ) { }
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virtual BOOL FoundNoise() { return FALSE; }
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// CNoiseListInit returns a dummy value
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virtual OCCURRENCE GetOccurrence() { return 1; }
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};
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//+---------------------------------------------------------------------------
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//
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// Class: PKeyRepository
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//
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// Purpose: Key repository protocol: last stage of filtering pipeline
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//
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// History: 30-May-1991 t-WadeR Created.
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// 09-July-1991 t-WadeR Added PutPropId, PutWorkId
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// 13-Sep-1994 BartoszM Added extended GetBuffers call
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//
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//----------------------------------------------------------------------------
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class PKeyRepository
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{
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public:
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virtual ~PKeyRepository() {}
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virtual BOOL PutPropId( PROPID pid ) = 0;
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virtual void PutWorkId( WORKID wid ) = 0;
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virtual void PutKey( ULONG cNoiseWordsSkipped = 0 ) = 0;
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virtual void GetBuffers( unsigned** ppcbWordBuf,
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BYTE** ppbWordBuf, OCCURRENCE** ppocc ) = 0;
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virtual void GetSourcePosBuffers( ULONG** pSrcPos, ULONG** pSrcLen)
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{
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*pSrcPos = 0;
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*pSrcLen = 0;
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}
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virtual void GetFlags ( BOOL** ppRange, CI_RANK** ppRank ) = 0;
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virtual const ULONG GetFilteredBlockCount() const = 0;
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virtual void InitFilteredBlockCount( ULONG ulMaxFilteredBlocks ) { Win4Assert( !"Method should be overridden in child class" ); }
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virtual void StartAltPhrase( ULONG cNoiseWordsSkipped ) { Win4Assert( !"Method should be overridden in child class" ); }
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virtual void EndAltPhrase( ULONG cNoiseWordsSkipped ) { Win4Assert( !"Method should be overridden in child class" ); }
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virtual BOOL StoreValue( CFullPropSpec const & prop, CStorageVariant const & var );
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virtual BOOL StoreSecurity ( PSECURITY_DESCRIPTOR pSD, ULONG cbSD );
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virtual void FixUp( CDataRepository & drep ) {}
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};
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inline BOOL PKeyRepository::StoreValue(
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CFullPropSpec const & prop,
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CStorageVariant const & var )
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{
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// No storage allowed, by default.
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return FALSE;
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}
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inline BOOL PKeyRepository::StoreSecurity(
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PSECURITY_DESCRIPTOR pSD,
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ULONG cbSD )
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{
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// No storage allowed, by default.
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return FALSE;
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}
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