279 lines
6.8 KiB
C++
279 lines
6.8 KiB
C++
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//+------------------------------------------------------------------
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//
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// Copyright (C) 1991-1997 Microsoft Corporation.
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//
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// File: notprop.cxx
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//
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// Contents: Notification stat property enumeration interfaces
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//
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// Classes: CINStatPropertyEnum, CINStatPropertyStorage
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//
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// History: 24-Feb-97 SitaramR 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 "notprop.hxx"
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyEnum::AddRef
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//
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// Synopsis: Increments refcount
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CINStatPropertyEnum::AddRef()
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{
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return InterlockedIncrement( (long *) &_cRefs );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyEnum::Release
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//
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// Synopsis: Decrement refcount. Delete if necessary.
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CINStatPropertyEnum::Release()
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{
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Win4Assert( _cRefs > 0 );
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ULONG uTmp = InterlockedDecrement( (long *) &_cRefs );
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if ( 0 == uTmp )
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delete this;
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return(uTmp);
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyEnum::QueryInterface
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//
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// Synopsis: Rebind to other interface
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//
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// Arguments: [riid] -- IID of new interface
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// [ppvObject] -- New interface * returned here
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//
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// Returns: S_OK if bind succeeded, E_NOINTERFACE if bind failed
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE CINStatPropertyEnum::QueryInterface( REFIID riid,
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void ** ppvObject)
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{
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Win4Assert( 0 != ppvObject );
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if ( riid == IID_IEnumSTATPROPSTG )
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*ppvObject = (void *)(IEnumSTATPROPSTG *) this;
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else if ( riid == IID_IUnknown )
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*ppvObject = (void *)(IUnknown *) 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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}
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyStorage::AddRef
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//
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// Synopsis: Increments refcount
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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CINStatPropertyStorage::CINStatPropertyStorage()
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: _cRefs(1)
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{
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyStorage::AddRef
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//
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// Synopsis: Increments refcount
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CINStatPropertyStorage::AddRef()
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{
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return InterlockedIncrement( (long *) &_cRefs );
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyStorage::Release
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//
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// Synopsis: Decrement refcount. Delete if necessary.
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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ULONG STDMETHODCALLTYPE CINStatPropertyStorage::Release()
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{
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Win4Assert( _cRefs > 0 );
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ULONG uTmp = InterlockedDecrement( (long *) &_cRefs );
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if ( 0 == uTmp )
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delete this;
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return(uTmp);
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyStorage::QueryInterface
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//
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// Synopsis: Rebind to other interface
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//
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// Arguments: [riid] -- IID of new interface
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// [ppvObject] -- New interface * returned here
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//
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// Returns: S_OK if bind succeeded, E_NOINTERFACE if bind failed
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE CINStatPropertyStorage::QueryInterface( REFIID riid,
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void ** ppvObject)
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{
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Win4Assert( 0 != ppvObject );
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if ( riid == IID_IUnknown )
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{
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AddRef();
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*ppvObject = (void *)(IUnknown *) this;
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return S_OK;
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}
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else if ( riid == IID_IPropertyStorage )
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{
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AddRef();
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*ppvObject = (void *)(IPropertyStorage *) this;
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return S_OK;
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}
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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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}
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyStorage::ReadMultiple
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//
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// Synopsis: Generates a file size property
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE CINStatPropertyStorage::ReadMultiple(
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ULONG cpspec,
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const PROPSPEC rgpspec[],
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PROPVARIANT rgpropvar[] )
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{
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for (ULONG i = 0; i < cpspec; i++)
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{
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//
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// String named properties are not found, and we only return
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// the size property. The size is chosen to be a large number
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// because the size is used to enforce space limits on
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// filtering.
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//
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PROPID PropertyId;
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if (rgpspec[i].ulKind == PRSPEC_LPWSTR)
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PropertyId = 0xFFFFFFFF;
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else
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PropertyId = rgpspec[i].propid;
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if ( PropertyId == PID_STG_SIZE )
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{
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rgpropvar[i].vt = VT_I8;
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LARGE_INTEGER largeInt;
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largeInt.QuadPart = 0xFFFFFFF;
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rgpropvar[i].hVal = largeInt;
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}
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else
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{
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//
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// No other properties exist, they are not found
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//
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rgpropvar[i].vt = VT_EMPTY;
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return E_FAIL;
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}
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}
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return S_OK;
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}
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//+-------------------------------------------------------------------------
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//
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// Method: CINStatPropertyStorage::Enum
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//
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// Synopsis: Returns an IEnumSTATPROPSTG interface
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//
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// History: 24-Feb-1997 SitaramR Created
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//
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//--------------------------------------------------------------------------
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SCODE STDMETHODCALLTYPE CINStatPropertyStorage::Enum( IEnumSTATPROPSTG **ppenum )
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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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*ppenum = new CINStatPropertyEnum;
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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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ciDebugOut(( DEB_ERROR,
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"CINStatPropertyEnum::Enum - Exception caught 0x%x\n",
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sc ));
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}
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END_CATCH;
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return sc;
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}
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