Initial commit - WPinternals 2.6

DiscUtils/BuilderExtent.cs

@@ -0,0 +1,69 @@
+//
+// Copyright (c) 2008-2011, Kenneth Bell
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+namespace DiscUtils
+{
+    using System;
+    using System.Collections.Generic;
+
+    internal abstract class BuilderExtent : IDisposable
+    {
+        private long _start;
+        private long _length;
+
+        public BuilderExtent(long start, long length)
+        {
+            _start = start;
+            _length = length;
+        }
+
+        /// <summary>
+        /// Gets the parts of the stream that are stored.
+        /// </summary>
+        /// <remarks>This may be an empty enumeration if all bytes are zero.</remarks>
+        public virtual IEnumerable<StreamExtent> StreamExtents
+        {
+            get
+            {
+                return new StreamExtent[] { new StreamExtent(Start, Length) };
+            }
+        }
+
+        internal long Start
+        {
+            get { return _start; }
+        }
+
+        internal long Length
+        {
+            get { return _length; }
+        }
+
+        public abstract void Dispose();
+
+        internal abstract void PrepareForRead();
+
+        internal abstract int Read(long diskOffset, byte[] block, int offset, int count);
+
+        internal abstract void DisposeReadState();
+    }
+}