146 lines
2.8 KiB
C++
146 lines
2.8 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1999.
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//
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// File: set.hxx
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//
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// Contents:
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//
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// History: 26 Mar 1999 MihaiPS Created
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//
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//--------------------------------------------------------------------------
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#pragma once
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template< class CElem >
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class TSet
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{
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public:
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TSet( unsigned size = arraySize )
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:
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_array( size ),
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_iHintEmpty( 0 ),
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_count( 0 )
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{}
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unsigned Count() const
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{
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return _count;
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}
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void Add( CElem* pElem );
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void Remove( CElem const * pElem );
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#if 0
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BOOL Contains( CElem const * pElem ) const;
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CElem* Element();
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#endif
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protected:
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CDynArray< CElem > _array;
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// this is the count of elements in the array
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unsigned _count;
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// this is a hint for an empty location
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unsigned _iHintEmpty;
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};
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template< class CElem >
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void TSet< CElem >::Add( CElem* pElem )
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{
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while( 0 != _array[ _iHintEmpty ] && _iHintEmpty < _array.Size() )
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{
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_iHintEmpty ++;
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}
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if( _iHintEmpty < _array.Size() )
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{
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Win4Assert( 0 == _array[ _iHintEmpty ] );
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_array[ _iHintEmpty ] = pElem;
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}
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else
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{
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Win4Assert( _array.Size() == _iHintEmpty );
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_array.Add( pElem, _iHintEmpty );
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}
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_iHintEmpty++;
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_count++;
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Win4Assert( _count <= _array.Size() );
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}
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template< class CElem >
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void TSet< CElem >::Remove( CElem const * pElem )
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{
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unsigned count = 0;
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Win4Assert( _count <= _array.Size() );
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for( unsigned iElem = 0;
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count < _count && iElem < _array.Size();
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iElem++ )
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{
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if( 0 != _array[ iElem ] )
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{
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count++;
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if( _array[ iElem ] == pElem )
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{
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_array[ iElem ] = 0;
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_count--;
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return;
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}
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}
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else if( _iHintEmpty > iElem )
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{
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_iHintEmpty = iElem;
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}
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}
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Win4Assert( !"Element not in set" );
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}
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#if 0
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template< class CElem >
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BOOL TSet< CElem >::Contains( CElem const * pElem ) const
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{
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unsigned count = 0;
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Win4Assert( _count <= _array.Size() );
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for( unsigned iElem = 0;
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count < _count && iElem < _array.Size();
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iElem++ )
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{
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if( 0 != _array[ iElem ] )
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{
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count++;
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if( _array[ iElem ] == pElem )
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{
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return TRUE;
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}
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}
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}
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return FALSE;
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}
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template< class CElem >
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CElem* TSet< CElem >::Element()
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{
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for( unsigned iElem = 0;
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iElem < _array.Size();
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iElem++ )
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{
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CElem* pElem = _array[ iElem ];
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if( 0 != pElem )
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{
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_array[ iElem ] = 0;
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_count --;
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_iHintEmpty = 0;
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return pElem;
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}
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}
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return 0;
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}
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#endif
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