xpcom/glue/nsISupportsImpl.cpp


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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupportsImpl.h"

nsresult NS_FASTCALL
NS_TableDrivenQI(void* aThis, REFNSIID aIID, void** aInstancePtr,
                 const QITableEntry* aEntries)
{
  do {
    if (aIID.Equals(*aEntries->iid)) {
      nsISupports* r = reinterpret_cast<nsISupports*>(
        reinterpret_cast<char*>(aThis) + aEntries->offset);
      NS_ADDREF(r);
      *aInstancePtr = r;
      return NS_OK;
    }

    ++aEntries;
  } while (aEntries->iid);

  *aInstancePtr = nullptr;
  return NS_ERROR_NO_INTERFACE;
}