1 files changed, 26 insertions, 0 deletions
diff --git a/dom/base/nsAtomListUtils.cpp b/dom/base/nsAtomListUtils.cpp
new file mode 100644
index 0000000000..e6dc8f7287
--- /dev/null
+++ b/dom/base/nsAtomListUtils.cpp
@@ -0,0 +1,26 @@
+/* -*- 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/. */
+
+/*
+ * Static helper class for implementing atom lists.
+ */
+
+#include "nsAtomListUtils.h"
+#include "nsIAtom.h"
+#include "nsStaticAtom.h"
+
+/* static */ bool
+nsAtomListUtils::IsMember(nsIAtom *aAtom,
+                          const nsStaticAtom* aInfo,
+                          uint32_t aInfoCount)
+{
+    for (const nsStaticAtom *info = aInfo, *info_end = aInfo + aInfoCount;
+         info != info_end; ++info) {
+        if (aAtom == *(info->mAtom))
+            return true;
+    }
+    return false;
+}