106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1997.
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//
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// File: PMComp.hxx
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//
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// Contents: Persistent index decompressor using during master merge
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//
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// Classes: CMPersDeComp
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//
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// History: 21-Apr-94 DwightKr Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include "pcomp.hxx"
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class CSplitKeyInfo;
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//+---------------------------------------------------------------------------
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//
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// Class: CMPersDeComp
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//
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// Purpose: Persistent index de-compressor uding during master merges
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//
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// History: 21-Apr-94 DwightKr Created.
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//
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// Notes: An implementation of the CPersDeComp class used during
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// master merge only.
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//----------------------------------------------------------------------------
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class CMPersDeComp: public CKeyCursor
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{
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public:
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CMPersDeComp(
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PDirectory & curDir,
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INDEXID curIid,
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CPhysIndex & curIndex,
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WORKID curWidMax,
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PDirectory & newDir,
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INDEXID newIid,
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CPhysIndex & newIndex,
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const CKey * pKey,
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WORKID newWidMax,
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const CSplitKeyInfo & splitKeyInfo,
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CMutexSem & mutex );
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virtual ~CMPersDeComp();
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const CKeyBuf * GetKey();
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const CKeyBuf * GetNextKey();
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const CKeyBuf * GetNextKey( BitOffset * pbitOff );
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WORKID WorkId();
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WORKID NextWorkId();
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ULONG WorkIdCount();
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OCCURRENCE Occurrence();
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OCCURRENCE NextOccurrence();
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ULONG OccurrenceCount();
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OCCURRENCE MaxOccurrence();
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ULONG HitCount();
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void RatioFinished ( ULONG& denom, ULONG& num )
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{
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_pActiveCursor->RatioFinished (denom, num);
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}
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void FreeStream() { _pActiveCursor->FreeStream(); }
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void RefillStream() { _pActiveCursor->RefillStream(); }
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protected:
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PDirectory & _curDir; // Directory of the current master index
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INDEXID _curIid; // Index id of the current master index
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CPhysIndex & _curIndex; // Physical index containing current master
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WORKID _curWidMax; // WidMax of current master index.
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PDirectory & _newDir; // Directory of the new master index
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INDEXID _newIid; // Index id of the new master index
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CPhysIndex & _newIndex; // Physical index containing new master
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WORKID _newWidMax; // Max WORKID in the new master index
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const CSplitKeyInfo & _splitKeyInfo; // up to date split key info
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BOOL _fUseNewIndex; // Currently using new or current master
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CPersDeComp * _pActiveCursor; // Current active cursor
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CKeyBuf _lastSplitKeyBuf; // most recent split key buf
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BitOffset _lastSplitKeyOffset; // most recent split key offset
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CMutexSem & _mutex; // serialize splitkeyinfo access
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};
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