You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
3.2 KiB
101 lines
3.2 KiB
//+---------------------------------------------------------------------------
|
|
//
|
|
// Microsoft Windows
|
|
// Copyright (C) Microsoft Corporation, 1991 - 2000.
|
|
//
|
|
// File: PValXpr.cxx
|
|
//
|
|
// Contents: Property value expression class
|
|
//
|
|
// Classes: CXpr
|
|
//
|
|
// History: 11-Sep-91 KyleP Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
#include <pch.cxx>
|
|
#pragma hdrstop
|
|
|
|
#include <objcur.hxx>
|
|
#include <pvalxpr.hxx>
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CXprPropertyValue::CXprPropertyValue, public
|
|
//
|
|
// Synopsis: Constructs a property value expression.
|
|
//
|
|
// Arguments: [pcxpr] -- Expression to evaluate.
|
|
// [propinfo] -- Used to query statistics of specific property
|
|
//
|
|
// Requires: [cxpr] Must be just a property name in Win 4.0
|
|
//
|
|
// Returns: GVRSuccess if successful
|
|
//
|
|
// History: 14-Oct-91 KyleP Created.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
CXprPropertyValue::CXprPropertyValue( PROPID pid )
|
|
: _pid( pid )
|
|
{
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CXprPropertyValue::~CXprPropertyValue, public
|
|
//
|
|
// Synopsis: Virtual destructor required.
|
|
//
|
|
// History: 15-Oct-91 KyleP Created.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
CXprPropertyValue::~CXprPropertyValue()
|
|
{
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CXprPropertyValue::GetValue, public
|
|
//
|
|
// Synopsis: Computes the value of the expression for the current row.
|
|
//
|
|
// Arguments: [obj] -- Objects table to retrieve values from. It is
|
|
// assumed to be positioned on the object whose
|
|
// property values are to be extracted.
|
|
// [p] -- Storage for the returned property value. On
|
|
// return this will contain a PROPVARIANT at its head.
|
|
// [pcb] -- Size allocated for p. Space after the PROPVARIANT
|
|
// structure itself can be used by GetValue to
|
|
// append structures which are sometimes pointed
|
|
// at by an PROPVARIANT.
|
|
//
|
|
// Returns: GVRSuccess if successful
|
|
// *[pcb] contains the size required for p.
|
|
//
|
|
// History: 16-Oct-91 KyleP Created.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
GetValueResult CXprPropertyValue::GetValue( CRetriever & obj,
|
|
PROPVARIANT * p,
|
|
ULONG * pcb )
|
|
{
|
|
return( obj.GetPropertyValue( _pid, p, pcb ) );
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CXprPropertyValue::ValueType, public
|
|
//
|
|
// Returns: The property type of the property.
|
|
//
|
|
// History: 26-Nov-91 KyleP Created.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
ULONG CXprPropertyValue::ValueType() const
|
|
{
|
|
return( 0 );
|
|
}
|