82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: sglookup.hxx
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//
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// Contents: A class for doing a quick lookup of a segment based on the
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// key. It will do a binary search and locate the segment.
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// This is useful for doing row insertions into a large table
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// when keys are not coming in any specific order.
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//
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//
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// Classes: CSegmentArray
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//
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// Functions:
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//
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// History: 10-20-95 srikants Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include <tableseg.hxx>
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class CTableSegList;
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class CTableKeyCompare;
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class CSegmentArray : public CDynArrayInPlace<CTableSegment *>
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{
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enum { eMinSegments = 16, eMaxSegments = 1024 };
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public:
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CSegmentArray();
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CTableSegment * LookUp( CTableRowKey & key );
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void Append( CTableSegment * pSeg );
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void InsertAfter( const CTableSegment * pMarker, CTableSegment * pSeg );
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void InsertBefore( const CTableSegment * pMarker, CTableSegment * pSeg );
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void Replace( const CTableSegment * pOld, CTableSegment * pNew );
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void Replace( const CTableSegment * pSrc, CTableSegList & segList );
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void RemoveEntry( const CTableSegment * pSegment );
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void SetComparator( CTableKeyCompare * pComparator )
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{
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Win4Assert( 0 == _pComparator && 0 != pComparator );
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_pComparator = pComparator;
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}
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BOOL IsFound( const CTableSegment * pSeg )
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{
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return _FindSegment( pSeg ) >= 0;
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}
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#if CIDBG==1
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void TestInSync( CTableSegList & list );
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#else
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void TestInSync( CTableSegList & list ) {}
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#endif // CIDBG
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private:
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CTableKeyCompare * _pComparator;
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int _FindSegment( const CTableSegment * pSeg );
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void _MoveEntries( unsigned iStart, unsigned cEntries );
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unsigned _iHint; // the last hint used
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};
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