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159 lines
3.2 KiB
159 lines
3.2 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1994-1998.
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//
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// File: InvCur.cxx
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//
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// Contents: 'Invalid' cursor. Cursor over the pidUnfiltered property
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// based on a given widmap.
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//
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// Classes: CUnfilteredCursor
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//
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// History: 09-Nov-94 KyleP Created.
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <widtab.hxx>
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#include "invcur.hxx"
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static const BYTE abUnfiltered[] = { VT_UI1,
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(BYTE)(pidUnfiltered >> 24),
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(BYTE)(pidUnfiltered >> 16),
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(BYTE)(pidUnfiltered >> 8),
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(BYTE) pidUnfiltered,
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0,
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1 };
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CKeyBuf CUnfilteredCursor::_TheUnfilteredKey( pidUnfiltered, abUnfiltered, sizeof(abUnfiltered) );
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int CUnfilteredCursor::CompareAgainstUnfilteredKey( CKey const & key )
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{
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//
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// Compare not available on CKeyBuf
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//
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return( key.CompareStr( _TheUnfilteredKey ) * -1 );
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}
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CUnfilteredCursor::CUnfilteredCursor( INDEXID iid, WORKID widMax, CWidTable const & widtab )
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: CKeyCursor( iid, widMax ),
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_widtab( widtab ),
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_iCurrentFakeWid( 0 ),
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_occ( 1 ),
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_fAtEnd( FALSE ),
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_fKeyMoved( FALSE )
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{
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NextWorkId();
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UpdateWeight();
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Win4Assert( WorkId() != widInvalid );
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}
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ULONG CUnfilteredCursor::WorkIdCount()
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{
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ULONG CUnfiltered = 0;
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for ( unsigned i = 1; i <= _widtab.Count(); i++ )
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{
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if ( !_widtab.IsFiltered(i) && _widtab.IsValid(i) )
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CUnfiltered++;
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}
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return( CUnfiltered );
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}
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WORKID CUnfilteredCursor::WorkId()
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{
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if ( _fAtEnd )
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return( widInvalid );
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else
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return( _widtab.FakeWidToUnfilteredWid( _iCurrentFakeWid ) );
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}
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void CUnfilteredCursor::RatioFinished (ULONG& denom, ULONG& num)
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{
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denom = _widtab.Count();
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num = min (denom, _iCurrentFakeWid);
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}
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WORKID CUnfilteredCursor::NextWorkId()
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{
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Win4Assert( !_fKeyMoved);
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for ( _iCurrentFakeWid++; _iCurrentFakeWid <= _widtab.Count(); _iCurrentFakeWid++ )
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{
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if ( !_widtab.IsFiltered(_iCurrentFakeWid) && _widtab.IsValid( _iCurrentFakeWid ) )
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break;
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}
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if ( _iCurrentFakeWid > _widtab.Count() )
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{
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_fAtEnd = TRUE;
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_occ = OCC_INVALID;
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}
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else
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{
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Win4Assert( !_fAtEnd );
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_occ = 1;
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}
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return( WorkId() );
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}
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ULONG CUnfilteredCursor::HitCount()
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{
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return( 1 );
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}
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OCCURRENCE CUnfilteredCursor::Occurrence()
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{
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return( _occ );
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}
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OCCURRENCE CUnfilteredCursor::NextOccurrence()
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{
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_occ = OCC_INVALID;
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return( _occ );
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}
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OCCURRENCE CUnfilteredCursor::MaxOccurrence()
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{
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return 1;
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}
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ULONG CUnfilteredCursor::OccurrenceCount()
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{
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Win4Assert( _occ != OCC_INVALID );
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return( 1 );
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}
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CKeyBuf const * CUnfilteredCursor::GetKey()
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{
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if ( _fKeyMoved )
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return( 0 );
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else
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return( &_TheUnfilteredKey );
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}
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CKeyBuf const * CUnfilteredCursor::GetNextKey()
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{
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_fKeyMoved = TRUE;
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_fAtEnd = TRUE;
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_occ = OCC_INVALID;
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return( 0 );
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}
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