Initial commit - WPinternals 2.6

DiscUtils/StreamBuilder.cs

@@ -0,0 +1,76 @@
+//
+// 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.Collections.Generic;
+    using System.IO;
+
+    /// <summary>
+    /// Base class for objects that can dynamically construct a stream.
+    /// </summary>
+    public abstract class StreamBuilder
+    {
+        /// <summary>
+        /// Builds a new stream.
+        /// </summary>
+        /// <returns>The stream created by the StreamBuilder instance.</returns>
+        public virtual SparseStream Build()
+        {
+            long totalLength;
+            List<BuilderExtent> extents = FixExtents(out totalLength);
+            return new BuiltStream(totalLength, extents);
+        }
+
+        /// <summary>
+        /// Writes the stream contents to an existing stream.
+        /// </summary>
+        /// <param name="output">The stream to write to.</param>
+        public void Build(Stream output)
+        {
+            using (Stream src = Build())
+            {
+                byte[] buffer = new byte[64 * 1024];
+                int numRead = src.Read(buffer, 0, buffer.Length);
+                while (numRead != 0)
+                {
+                    output.Write(buffer, 0, numRead);
+                    numRead = src.Read(buffer, 0, buffer.Length);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Writes the stream contents to a file.
+        /// </summary>
+        /// <param name="outputFile">The file to write to.</param>
+        public void Build(string outputFile)
+        {
+            using (FileStream destStream = new FileStream(outputFile, FileMode.Create, FileAccess.Write))
+            {
+                Build(destStream);
+            }
+        }
+
+        internal abstract List<BuilderExtent> FixExtents(out long totalLength);
+    }
+}