204 lines
4.8 KiB
C++
204 lines
4.8 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1998.
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//
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// File: propmap.cxx
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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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// Functions:
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//
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// History: 12-11-96 srikants 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 <propmap.hxx>
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#include <pidtable.hxx>
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CFwPropertyMapper::~CFwPropertyMapper()
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{
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if ( _fOwned )
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delete _pPidTable;
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delete _papsShortLived;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CFwPropertyMapper::QueryInterface
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//
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// Synopsis: Supports IID_IUnknown and IID_IPropertyMapper.
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//
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// History: 11-27-96 srikants Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CFwPropertyMapper::QueryInterface(
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REFIID riid,
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void **ppvObject)
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{
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Win4Assert( 0 != ppvObject );
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if ( IID_IPropertyMapper == riid )
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*ppvObject = (void *)((IPropertyMapper *)this);
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else if ( IID_IUnknown == riid )
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*ppvObject = (void *)((IUnknown *) (IPropertyMapper *) this);
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else
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{
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*ppvObject = 0;
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return E_NOINTERFACE;
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}
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AddRef();
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return S_OK;
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} //QueryInterface
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//+---------------------------------------------------------------------------
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//
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// Member: CFwPropertyMapper::AddRef
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//
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// History: 11-22-96 srikants Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CFwPropertyMapper::AddRef()
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{
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return InterlockedIncrement(&_refCount);
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} //AddRef
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//+---------------------------------------------------------------------------
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//
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// Member: CFwPropertyMapper::Release
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//
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// History: 11-22-96 srikants Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CFwPropertyMapper::Release()
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{
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Win4Assert( _refCount > 0 );
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LONG refCount = InterlockedDecrement(&_refCount);
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if ( refCount <= 0 )
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delete this;
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return (ULONG) refCount;
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} //Release
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//+---------------------------------------------------------------------------
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//
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// Member: CFwPropertyMapper::PropertyToPropid
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//
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// Synopsis: Maps a FULLPROPSPEC into a 32bit PropertyId.
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//
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// Arguments: [fps] - FULLPROPSPEC of the property to be converted
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// [fCreate] - If set to TRUE, the pid will be created if the
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// property is a new one.
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// [pPropId] - On output, will have the pid.
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//
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// Returns: S_OK if successful, other error code as appropriate.
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//
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// History: 12-11-96 srikants Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CFwPropertyMapper::PropertyToPropid(
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FULLPROPSPEC const * fps,
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BOOL fCreate,
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PROPID * pPropId )
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{
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Win4Assert( fps );
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Win4Assert( pPropId );
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CFullPropSpec const * ps = (CFullPropSpec *) fps;
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PROPID pid = _propMapper.StandardPropertyToPropId( *ps );
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if ( pidInvalid != pid )
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{
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*pPropId = pid;
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return S_OK;
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}
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SCODE sc = S_OK;
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TRY
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{
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//
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// Since a null catalog didn't have an opportunity
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// to enter properties into the prop store, we have to
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// let it enter them into a in memory table whose
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// lifetime is that of the null catalog.
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//
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if (_fMapStdOnly)
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*pPropId = LocateOrAddProperty(*ps);
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else
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_pPidTable->FindPropid( *ps, *pPropId, fCreate );
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}
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CATCH( CException,e )
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{
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sc = e.GetErrorCode();
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}
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END_CATCH
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return sc;
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CFwPropertyMapper::LocateOrAddProperty, private
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//
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// Synopsis: Lookup property and enter if it doesn't exist.
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//
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// Arguments: [ps] -- Property specification (name)
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//
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// Returns: The pid of [ps].
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//
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// History: 23-July-1997 KrishnaN Created
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//
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//--------------------------------------------------------------------------
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PROPID CFwPropertyMapper::LocateOrAddProperty(CFullPropSpec const & ps)
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{
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PROPID pid = pidInvalid;
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//
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// Create pid good only for life of catalog.
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//
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//
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// Have we seen this property before? Use linear search since
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// we shouldn't have too many of these.
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//
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for ( unsigned i = 0; i < _cps; i++ )
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{
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if ( ps == _papsShortLived->Get(i)->PS() )
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break;
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}
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if ( i < _cps )
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{
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pid = _papsShortLived->Get(i)->Pid();
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}
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else
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{
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pid = _pidNextAvailable++;
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CPropSpecPidMap * ppm = new CPropSpecPidMap( ps, pid );
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_papsShortLived->Add( ppm, _cps );
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_cps++;
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}
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return pid;
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}
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