xpcom/glue/nsISupportsImpl.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 "nsISupportsImpl.h"
   8
   9 nsresult NS_FASTCALL
  10 NS_TableDrivenQI(void* aThis, REFNSIID aIID, void** aInstancePtr,
  11                  const QITableEntry* aEntries)
  12 {
  13   do {
  14     if (aIID.Equals(*aEntries->iid)) {
  15       nsISupports* r = reinterpret_cast<nsISupports*>(
  16         reinterpret_cast<char*>(aThis) + aEntries->offset);
  17       NS_ADDREF(r);
  18       *aInstancePtr = r;
  19       return NS_OK;
  20     }
  21
  22     ++aEntries;
  23   } while (aEntries->iid);
  24
  25   *aInstancePtr = nullptr;
  26   return NS_ERROR_NO_INTERFACE;
  27 }