xpcom/base/nsIInterfaceRequestorUtils.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "nsIInterfaceRequestor.h"
   8 #include "nsIInterfaceRequestorUtils.h"
   9
  10 nsresult nsGetInterface::operator()(const nsIID& aIID,
  11                                     void** aInstancePtr) const {
  12   nsresult status;
  13
  14   if (mSource) {
  15     nsCOMPtr<nsIInterfaceRequestor> factoryPtr = do_QueryInterface(mSource);
  16     if (factoryPtr) {
  17       status = factoryPtr->GetInterface(aIID, aInstancePtr);
  18     } else {
  19       status = NS_ERROR_NO_INTERFACE;
  20     }
  21   } else {
  22     status = NS_ERROR_NULL_POINTER;
  23   }
  24
  25   if (NS_FAILED(status)) {
  26     *aInstancePtr = 0;
  27   }
  28   if (mErrorPtr) {
  29     *mErrorPtr = status;
  30   }
  31   return status;
  32 }