1 files changed, 108 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/ds/nsEmptyEnumerator.cpp b/src/libs/xpcom18a4/xpcom/ds/nsEmptyEnumerator.cpp
new file mode 100644
index 00000000..c00d118c
--- /dev/null
+++ b/src/libs/xpcom18a4/xpcom/ds/nsEmptyEnumerator.cpp
@@ -0,0 +1,108 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   L. David Baron <dbaron@dbaron.org>
+ *   Pierre Phaneuf <pp@ludusdesign.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+
+  An empty enumerator.
+
+ */
+
+#include "nsEmptyEnumerator.h"
+
+////////////////////////////////////////////////////////////////////////
+
+MOZ_DECL_CTOR_COUNTER(EmptyEnumeratorImpl)
+
+EmptyEnumeratorImpl::EmptyEnumeratorImpl(void)
+{
+    MOZ_COUNT_CTOR(EmptyEnumeratorImpl);
+}
+
+EmptyEnumeratorImpl::~EmptyEnumeratorImpl(void)
+{
+    MOZ_COUNT_DTOR(EmptyEnumeratorImpl);
+}
+
+// nsISupports interface
+NS_IMETHODIMP_(nsrefcnt) EmptyEnumeratorImpl::AddRef(void)
+{
+    return 2;
+}
+
+NS_IMETHODIMP_(nsrefcnt) EmptyEnumeratorImpl::Release(void)
+{
+    return 1;
+}
+
+NS_IMPL_QUERY_INTERFACE1(EmptyEnumeratorImpl, nsISimpleEnumerator)
+
+
+// nsISimpleEnumerator interface
+NS_IMETHODIMP EmptyEnumeratorImpl::HasMoreElements(PRBool* aResult)
+{
+    *aResult = PR_FALSE;
+    return NS_OK;
+}
+
+NS_IMETHODIMP EmptyEnumeratorImpl::GetNext(nsISupports** aResult)
+{
+    return NS_ERROR_UNEXPECTED;
+}
+
+static EmptyEnumeratorImpl* gEmptyEnumerator = nsnull;
+
+extern "C" NS_COM nsresult
+NS_NewEmptyEnumerator(nsISimpleEnumerator** aResult)
+{
+    nsresult rv = NS_OK;
+    if (!gEmptyEnumerator) {
+        gEmptyEnumerator = new EmptyEnumeratorImpl();
+        if (!gEmptyEnumerator)
+            rv = NS_ERROR_OUT_OF_MEMORY;
+    }
+    *aResult = gEmptyEnumerator;
+    return rv;
+}
+
+/* static */ void
+EmptyEnumeratorImpl::Shutdown()
+{
+    delete gEmptyEnumerator;
+    gEmptyEnumerator = nsnull;
+}