102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 2000.
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//
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// File: PValXpr.cxx
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//
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// Contents: Property value expression class
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//
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// Classes: CXpr
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//
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// History: 11-Sep-91 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 <objcur.hxx>
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#include <pvalxpr.hxx>
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//+---------------------------------------------------------------------------
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//
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// Member: CXprPropertyValue::CXprPropertyValue, public
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//
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// Synopsis: Constructs a property value expression.
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//
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// Arguments: [pcxpr] -- Expression to evaluate.
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// [propinfo] -- Used to query statistics of specific property
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//
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// Requires: [cxpr] Must be just a property name in Win 4.0
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//
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// Returns: GVRSuccess if successful
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//
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// History: 14-Oct-91 KyleP Created.
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//
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//----------------------------------------------------------------------------
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CXprPropertyValue::CXprPropertyValue( PROPID pid )
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: _pid( pid )
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{
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CXprPropertyValue::~CXprPropertyValue, public
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//
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// Synopsis: Virtual destructor required.
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//
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// History: 15-Oct-91 KyleP Created.
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//
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//----------------------------------------------------------------------------
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CXprPropertyValue::~CXprPropertyValue()
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{
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CXprPropertyValue::GetValue, public
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//
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// Synopsis: Computes the value of the expression for the current row.
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//
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// Arguments: [obj] -- Objects table to retrieve values from. It is
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// assumed to be positioned on the object whose
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// property values are to be extracted.
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// [p] -- Storage for the returned property value. On
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// return this will contain a PROPVARIANT at its head.
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// [pcb] -- Size allocated for p. Space after the PROPVARIANT
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// structure itself can be used by GetValue to
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// append structures which are sometimes pointed
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// at by an PROPVARIANT.
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//
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// Returns: GVRSuccess if successful
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// *[pcb] contains the size required for p.
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//
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// History: 16-Oct-91 KyleP Created.
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//
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//----------------------------------------------------------------------------
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GetValueResult CXprPropertyValue::GetValue( CRetriever & obj,
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PROPVARIANT * p,
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ULONG * pcb )
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{
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return( obj.GetPropertyValue( _pid, p, pcb ) );
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CXprPropertyValue::ValueType, public
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//
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// Returns: The property type of the property.
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//
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// History: 26-Nov-91 KyleP Created.
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//
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//----------------------------------------------------------------------------
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ULONG CXprPropertyValue::ValueType() const
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{
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return( 0 );
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}
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