1 files changed, 94 insertions, 0 deletions
diff --git a/qpid/dotnet/client-010/client/transport/util/Serial.cs b/qpid/dotnet/client-010/client/transport/util/Serial.cs
new file mode 100644
index 0000000000..874097084a
--- /dev/null
+++ b/qpid/dotnet/client-010/client/transport/util/Serial.cs
@@ -0,0 +1,94 @@
+/*
+*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you 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.
+*
+*/
+namespace org.apache.qpid.transport.util
+{
+    /// <summary> 
+    /// This class provides basic serial number comparisons as defined in
+    /// RFC 1982.
+    /// </summary>
+    public class Serial
+    {
+        ///
+        /// 
+        ///Compares two numbers using serial arithmetic.
+        ///
+        /// param s1 the first serial number
+        /// param s2 the second serial number
+        ///
+        /// return a negative integer, zero, or a positive integer as the
+        /// first argument is less than, equal to, or greater than the
+        ///  second
+        ///
+        public static int Compare(int s1, int s2)
+        {
+            return s1 - s2;
+        }
+
+        public static bool Lt(int s1, int s2)
+        {
+            return Compare(s1, s2) < 0;
+        }
+
+        public static bool Le(int s1, int s2)
+        {
+            return Compare(s1, s2) <= 0;
+        }
+
+        public static bool Gt(int s1, int s2)
+        {
+            return Compare(s1, s2) > 0;
+        }
+
+        public static bool Ge(int s1, int s2)
+        {
+            return Compare(s1, s2) >= 0;
+        }
+
+        public static bool Eq(int s1, int s2)
+        {
+            return s1 == s2;
+        }
+
+        public static int Min(int s1, int s2)
+        {
+            if (Lt(s1, s2))
+            {
+                return s1;
+            }
+            else
+            {
+                return s2;
+            }
+        }
+
+        public static int Max(int s1, int s2)
+        {
+            if (Gt(s1, s2))
+            {
+                return s1;
+            }
+            else
+            {
+                return s2;
+            }
+        }
+    }
+}