1 files changed, 192 insertions, 0 deletions

diff --git a/src/dtf/WixToolset.Dtf.Compression/CargoStream.cs b/src/dtf/WixToolset.Dtf.Compression/CargoStream.cs
new file mode 100644
index 00000000..78798a35
--- /dev/null
+++ b/src/dtf/WixToolset.Dtf.Compression/CargoStream.cs
@@ -0,0 +1,192 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Dtf.Compression
+{
+    using System;
+    using System.Collections.Generic;
+    using System.IO;
+
+    /// <summary>
+    /// Wraps a source stream and carries additional items that are disposed when the stream is closed.
+    /// </summary>
+    public class CargoStream : Stream
+    {
+        private Stream source;
+        private List<IDisposable> cargo;
+
+        /// <summary>
+        /// Creates a new a cargo stream.
+        /// </summary>
+        /// <param name="source">source of the stream</param>
+        /// <param name="cargo">List of additional items that are disposed when the stream is closed.
+        /// The order of the list is the order in which the items are disposed.</param>
+        public CargoStream(Stream source, params IDisposable[] cargo)
+        {
+            if (source == null)
+            {
+                throw new ArgumentNullException("source");
+            }
+
+            this.source = source;
+            this.cargo = new List<IDisposable>(cargo);
+        }
+
+        /// <summary>
+        /// Gets the source stream of the cargo stream.
+        /// </summary>
+        public Stream Source
+        {
+            get
+            {
+                return this.source;
+            }
+        }
+
+        /// <summary>
+        /// Gets the list of additional items that are disposed when the stream is closed.
+        /// The order of the list is the order in which the items are disposed. The contents can be modified any time.
+        /// </summary>
+        public IList<IDisposable> Cargo
+        {
+            get
+            {
+                return this.cargo;
+            }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the source stream supports reading.
+        /// </summary>
+        /// <value>true if the stream supports reading; otherwise, false.</value>
+        public override bool CanRead
+        {
+            get
+            {
+                return this.source.CanRead;
+            }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the source stream supports writing.
+        /// </summary>
+        /// <value>true if the stream supports writing; otherwise, false.</value>
+        public override bool CanWrite
+        {
+            get
+            {
+                return this.source.CanWrite;
+            }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the source stream supports seeking.
+        /// </summary>
+        /// <value>true if the stream supports seeking; otherwise, false.</value>
+        public override bool CanSeek
+        {
+            get
+            {
+                return this.source.CanSeek;
+            }
+        }
+
+        /// <summary>
+        /// Gets the length of the source stream.
+        /// </summary>
+        public override long Length
+        {
+            get
+            {
+                return this.source.Length;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets the position of the source stream.
+        /// </summary>
+        public override long Position
+        {
+            get
+            {
+                return this.source.Position;
+            }
+
+            set
+            {
+                this.source.Position = value;
+            }
+        }
+
+        /// <summary>
+        /// Flushes the source stream.
+        /// </summary>
+        public override void Flush()
+        {
+            this.source.Flush();
+        }
+
+        /// <summary>
+        /// Sets the length of the source stream.
+        /// </summary>
+        /// <param name="value">The desired length of the stream in bytes.</param>
+        public override void SetLength(long value)
+        {
+            this.source.SetLength(value);
+        }
+
+        /// <summary>
+        /// Closes the source stream and also closes the additional objects that are carried.
+        /// </summary>
+        public override void Close()
+        {
+            this.source.Close();
+
+            foreach (IDisposable cargoObject in this.cargo)
+            {
+                cargoObject.Dispose();
+            }
+        }
+
+        /// <summary>
+        /// Reads from the source stream.
+        /// </summary>
+        /// <param name="buffer">An array of bytes. When this method returns, the buffer
+        /// contains the specified byte array with the values between offset and
+        /// (offset + count - 1) replaced by the bytes read from the source.</param>
+        /// <param name="offset">The zero-based byte offset in buffer at which to begin
+        /// storing the data read from the stream.</param>
+        /// <param name="count">The maximum number of bytes to be read from the stream.</param>
+        /// <returns>The total number of bytes read into the buffer. This can be less
+        /// than the number of bytes requested if that many bytes are not currently available,
+        /// or zero (0) if the end of the stream has been reached.</returns>
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            return this.source.Read(buffer, offset, count);
+        }
+
+        /// <summary>
+        /// Writes to the source stream.
+        /// </summary>
+        /// <param name="buffer">An array of bytes. This method copies count
+        /// bytes from buffer to the stream.</param>
+        /// <param name="offset">The zero-based byte offset in buffer at which
+        /// to begin copying bytes to the stream.</param>
+        /// <param name="count">The number of bytes to be written to the stream.</param>
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            this.source.Write(buffer, offset, count);
+        }
+
+        /// <summary>
+        /// Changes the position of the source stream.
+        /// </summary>
+        /// <param name="offset">A byte offset relative to the origin parameter.</param>
+        /// <param name="origin">A value of type SeekOrigin indicating the reference
+        /// point used to obtain the new position.</param>
+        /// <returns>The new position within the stream.</returns>
+        public override long Seek(long offset, SeekOrigin origin)
+        {
+            return this.source.Seek(offset, origin);
+        }
+    }
+}