add the ec2utils file i forgot

1 files changed, 27 insertions, 0 deletions

diff --git a/nova/api/ec2/ec2utils.py b/nova/api/ec2/ec2utils.py
new file mode 100644
index 000000000..0ea22c0e6
--- /dev/null
+++ b/nova/api/ec2/ec2utils.py
@@ -0,0 +1,27 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2010 United States Government as represented by the
+# Administrator of the National Aeronautics and Space Administration.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+
+def ec2_id_to_id(ec2_id):
+    """Convert an ec2 ID (i-[base 16 number]) to an instance id (int)"""
+    return int(ec2_id.split('-')[-1], 16)
+
+
+def id_to_ec2_id(instance_id, template='i-%08x'):
+    """Convert an instance ID (int) to an ec2 ID (i-[base 16 number])"""
+    return template % instance_id