1 files changed, 117 insertions, 0 deletions
diff --git a/qpid/dotnet/client-010/client/transport/Range.cs b/qpid/dotnet/client-010/client/transport/Range.cs
new file mode 100644
index 0000000000..904b1c1229
--- /dev/null
+++ b/qpid/dotnet/client-010/client/transport/Range.cs
@@ -0,0 +1,117 @@
+/*
+*
+* 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.
+*
+*/
+using System;
+using System.Collections.Generic;
+using org.apache.qpid.transport.util;
+
+namespace org.apache.qpid.transport
+{
+	
+	/// <summary> 
+	/// Range
+	/// </summary>
+
+
+    public sealed class Range
+    {
+        private int _lower;
+        private int _upper;
+
+        public Range(int lower, int upper)
+        {
+            _lower = lower;
+            _upper = upper;
+        }
+
+        public int Lower
+        {
+            get { return _lower; }
+            set { _lower = value; }
+        }
+        public int Upper
+        {
+            get { return _upper; }
+            set { _upper = value; }
+        }
+
+        public bool Includes(int value)
+        {
+            return Serial.Le(_lower, value) && Serial.Le(value, _upper);
+        }
+
+        public bool Includes(Range range)
+        {
+            return Includes(range._lower) && Includes(range._upper);
+        }
+
+        public bool Intersects(Range range)
+        {
+            return (Includes(range._lower) || Includes(range._upper) ||
+                    range.Includes(_lower) || range.Includes(_upper));
+        }
+
+        public bool Touches(Range range)
+        {
+            return (Intersects(range) ||
+                    Includes(range._upper + 1) || Includes(range._lower - 1) ||
+                    range.Includes(_upper + 1) || range.Includes(_lower - 1));
+        }
+
+        public Range Span(Range range)
+        {
+            return new Range(Serial.Min(_lower, range._lower), Serial.Max(_upper, range._upper));
+        }
+
+        public List<Range> Subtract(Range range)
+        {
+            List<Range> result = new List<Range>();
+
+            if (Includes(range._lower) && Serial.Le(_lower, range._lower - 1))
+            {
+                result.Add(new Range(_lower, range._lower - 1));
+            }
+
+            if (Includes(range._upper) && Serial.Le(range._upper + 1, _upper))
+            {
+                result.Add(new Range(range._upper + 1, _upper));
+            }
+
+            if (result.Count == 0 && !range.Includes(this))
+            {
+                result.Add(this);
+            }
+
+            return result;
+        }
+
+        public Range Intersect(Range range)
+        {
+            int l = Serial.Max(_lower, range._lower);
+            int r = Serial.Min(_upper, range._upper);
+            return Serial.Gt(l, r) ? null : new Range(l, r);
+        }
+
+        public override String ToString()
+        {
+            return "[" + _lower + ", " + _upper + "]";
+        }
+    }
+}