gecko-dev/xpcom/base/nsIInterfaceRequestor.cpp

49 lines
1.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Scott Collins <scc@netscape.com>
*/
#include "nsIInterfaceRequestor.h"
nsresult
nsGetInterface::operator()( const nsIID& aIID, void** aInstancePtr ) const
{
nsresult status;
if ( mSource )
{
nsCOMPtr<nsIInterfaceRequestor> factoryPtr = do_QueryInterface(mSource, &status);
NS_ASSERTION(factoryPtr, "Did you know you were calling |do_GetInterface()| on an object that doesn't support the |nsIInterfaceRequestor| interface?");
if ( factoryPtr )
status = factoryPtr->GetInterface(aIID, aInstancePtr);
if ( !NS_SUCCEEDED(status) )
*aInstancePtr = 0;
}
else
status = NS_ERROR_NULL_POINTER;
if ( mErrorPtr )
*mErrorPtr = status;
return status;
}