188 lines
4 KiB
C++
188 lines
4 KiB
C++
//+-------------------------------------------------------------------------
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//
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// Copyright (C) 1991, Microsoft Corporation.
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//
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// File: StateSet.hxx
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//
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// Contents:
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//
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// Classes:
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//
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// History: 01-20-92 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 "stateset.hxx"
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//+-------------------------------------------------------------------------
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//
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// Member: CStateSet::Clear, public
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//
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// Synopsis: Re-initializes a state set to empty.
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//
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// History: 20-Jan-92 KyleP Created
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//
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//--------------------------------------------------------------------------
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void CStateSet::Clear()
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{
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delete _puiRest;
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_cStates = 0;
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_cRest = 0;
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_puiRest = 0;
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_cuiRest = 0;
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CStateSet::Add, public
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//
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// Synopsis: Adds a state to the state set.
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//
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// Arguments: [state] -- State to add.
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//
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// History: 20-Jan-92 KyleP Created
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//
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//--------------------------------------------------------------------------
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void CStateSet::Add( UINT state )
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{
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if ( IsMember( state ) )
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return;
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if ( _cStates < CStateSet_cFirst )
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{
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_auiFirst[ _cStates ] = state;
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}
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else
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{
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if ( _cRest >= _cuiRest )
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{
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UINT * oldpuiRest = _puiRest;
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UINT oldcuiRest = _cuiRest;
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_cuiRest += 10;
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_puiRest = new UINT [ _cuiRest ];
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memcpy( _puiRest, oldpuiRest, oldcuiRest * sizeof( UINT ) );
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delete oldpuiRest;
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}
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_puiRest[ _cRest ] = state;
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++_cRest;
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}
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++_cStates;
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CStateSet::State, public
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//
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// Arguments: [iState] -- Index of state to return.
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//
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// Returns: The [iState] state in the state set.
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//
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// History: 20-Jan-92 KyleP Created
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//
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//--------------------------------------------------------------------------
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UINT CStateSet::State( UINT iState ) const
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{
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if ( iState <= CStateSet_cFirst )
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{
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return( _auiFirst[ iState - 1 ] );
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}
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else
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{
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return( _puiRest[ iState - CStateSet_cFirst - 1 ] );
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}
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CStateSet::IsMember, public
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//
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// Arguments: [state] -- State to look for.
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//
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// Returns: TRUE if [state] is in set.
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//
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// History: 20-Jan-92 KyleP Created
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//
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//--------------------------------------------------------------------------
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BOOL CStateSet::IsMember( UINT state )
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{
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if ( _cStates == 0 )
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return( FALSE );
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//
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// Naive implementation. As long as state sets are small this
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// will work fine.
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//
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for ( int i = min( _cStates, CStateSet_cFirst) - 1;
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i >= 0;
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i-- )
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{
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if( _auiFirst[ i ] == state )
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return( TRUE );
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}
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if ( _cStates > CStateSet_cFirst )
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{
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for ( int i = _cStates - CStateSet_cFirst - 1;
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i >= 0;
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i-- )
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{
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if( _puiRest[ i ] == state )
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return( TRUE );
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}
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}
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return( FALSE );
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}
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//
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// Debug methods
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//
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int compare( void const * p1, void const * p2 )
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{
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return( *(UINT*)p1 - *(UINT*)p2 );
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}
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#if (CIDBG == 1)
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void CStateSet::Display()
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{
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#if 0
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//
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// Just to always print something close to sorted.
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//
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qsort( _auiFirst,
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( _cStates < CStateSet_cFirst ) ? _cStates : CStateSet_cFirst,
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sizeof(UINT),
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compare );
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#endif
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vqDebugOut(( DEB_REGEX | DEB_NOCOMPNAME, "(" ));
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for (UINT i = 0; i < _cStates; i++)
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{
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if ( i <= CStateSet_cFirst-1 )
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vqDebugOut(( DEB_REGEX | DEB_NOCOMPNAME, " %u", _auiFirst[ i ] ));
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else
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vqDebugOut(( DEB_REGEX | DEB_NOCOMPNAME,
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" %u", _puiRest[ i - CStateSet_cFirst ] ));
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}
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vqDebugOut(( DEB_REGEX | DEB_NOCOMPNAME, " )" ));
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}
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#endif // (CIDBG == 1)
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