1 files changed, 27 insertions, 0 deletions
diff --git a/xpcom/glue/nsISupportsImpl.cpp b/xpcom/glue/nsISupportsImpl.cpp
new file mode 100644
index 0000000000..c60c0bfa73
--- /dev/null
+++ b/xpcom/glue/nsISupportsImpl.cpp
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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;
+}