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71 lines
1.7 KiB
71 lines
1.7 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1992.
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//
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// File: ANDCUR.HXX
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//
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// Contents: And cursor
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//
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// Classes: CAndCursor
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//
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// History: 24-May-91 BartoszM Created.
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//
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//----------------------------------------------------------------------------
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#pragma once
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#ifdef DISPLAY_INCLUDES
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#pragma message( "#include <" __FILE__ ">..." )
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#endif
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#include <cursor.hxx>
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#include <curstk.hxx>
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//+---------------------------------------------------------------------------
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//
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// Class: CAndCursor
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//
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// Purpose: Boolean And cursor (find documents that contain all of
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// the specified keys). Works with a single index.
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//
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// History: 24-May-91 BartoszM Created.
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// 30-Sep-91 BartoszM Removed CIndexCursor methods
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// 28-Feb-92 AmyA Added HitCount()
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// 14-Apr-92 AmyA Added Rank()
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//
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//----------------------------------------------------------------------------
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class CAndCursor: public CCursor
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{
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public:
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CAndCursor ( unsigned cCursor, CCurStack& curStack );
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~CAndCursor();
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WORKID WorkId();
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WORKID NextWorkId();
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ULONG HitCount();
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LONG Rank();
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LONG Hit();
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LONG NextHit();
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void RatioFinished ( ULONG& denom, ULONG& num );
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protected:
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BOOL FindConjunction();
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WORKID _wid;
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unsigned _cCur;
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unsigned _iCur;
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CCursor** _aCur;
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LONG _lMaxWeight; // Max Weight of any child
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};
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