1 files changed, 148 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp b/src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp
new file mode 100644
index 00000000..38d7d728
--- /dev/null
+++ b/src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp
@@ -0,0 +1,148 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** 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):
+ *
+ * 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 ***** */
+
+#include "nsSupportsArrayEnumerator.h"
+#include "nsISupportsArray.h"
+
+nsSupportsArrayEnumerator::nsSupportsArrayEnumerator(nsISupportsArray* array)
+  : mArray(array), mCursor(0)
+{
+  NS_ASSERTION(array, "null array");
+  NS_ADDREF(mArray);
+}
+
+nsSupportsArrayEnumerator::~nsSupportsArrayEnumerator()
+{
+  NS_RELEASE(mArray);
+}
+
+NS_IMPL_ISUPPORTS2(nsSupportsArrayEnumerator, nsIBidirectionalEnumerator, nsIEnumerator)
+
+NS_IMETHODIMP
+nsSupportsArrayEnumerator::First()
+{
+  mCursor = 0;
+  PRUint32 cnt;
+  nsresult rv = mArray->Count(&cnt);
+  if (NS_FAILED(rv)) return rv;
+  PRInt32 end = (PRInt32)cnt;
+  if (mCursor < end)
+    return NS_OK;
+  else
+    return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsSupportsArrayEnumerator::Next()
+{
+  PRUint32 cnt;
+  nsresult rv = mArray->Count(&cnt);
+  if (NS_FAILED(rv)) return rv;
+  PRInt32 end = (PRInt32)cnt;
+  if (mCursor < end)   // don't count upward forever
+    mCursor++;
+  if (mCursor < end)
+    return NS_OK;
+  else
+    return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsSupportsArrayEnumerator::CurrentItem(nsISupports **aItem)
+{
+  NS_ASSERTION(aItem, "null out parameter");
+  PRUint32 cnt;
+  nsresult rv = mArray->Count(&cnt);
+  if (NS_FAILED(rv)) return rv;
+  if (mCursor >= 0 && mCursor < (PRInt32)cnt) {
+    *aItem = mArray->ElementAt(mCursor);
+    return NS_OK;
+  }
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsSupportsArrayEnumerator::IsDone()
+{
+  PRUint32 cnt;
+  nsresult rv = mArray->Count(&cnt);
+  if (NS_FAILED(rv)) return rv;
+  return (mCursor >= 0 && mCursor < (PRInt32)cnt)
+    ? NS_ENUMERATOR_FALSE : NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+NS_IMETHODIMP
+nsSupportsArrayEnumerator::Last()
+{
+  PRUint32 cnt;
+  nsresult rv = mArray->Count(&cnt);
+  if (NS_FAILED(rv)) return rv;
+  mCursor = cnt - 1;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSupportsArrayEnumerator::Prev()
+{
+  if (mCursor >= 0)
+    --mCursor;
+  if (mCursor >= 0)
+    return NS_OK;
+  else
+    return NS_ERROR_FAILURE;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+NS_COM nsresult
+NS_NewISupportsArrayEnumerator(nsISupportsArray* array,
+                               nsIBidirectionalEnumerator* *aInstancePtrResult)
+{
+  if (aInstancePtrResult == 0)
+    return NS_ERROR_NULL_POINTER;
+  nsSupportsArrayEnumerator* e = new nsSupportsArrayEnumerator(array);
+  if (e == 0)
+    return NS_ERROR_OUT_OF_MEMORY;
+  NS_ADDREF(e);
+  *aInstancePtrResult = e;
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+