GZip File Objects

* Duplicated from BZip2.cs

Author: McNeight

ICSharpCode.SharpZipLib/GZip/GZip.cs

@@ -0,0 +1,102 @@
+// GZip.cs
+//
+// Copyright © 2000-2016 AlphaSierraPapa for the SharpZipLib Team
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+// Linking this library statically or dynamically with other modules is
+// making a combined work based on this library.  Thus, the terms and
+// conditions of the GNU General Public License cover the whole
+// combination.
+// 
+// As a special exception, the copyright holders of this library give you
+// permission to link this library with independent modules to produce an
+// executable, regardless of the license terms of these independent
+// modules, and to copy and distribute the resulting executable under
+// terms of your choice, provided that you also meet, for each linked
+// independent module, the terms and conditions of the license of that
+// module.  An independent module is a module which is not derived from
+// or based on this library.  If you modify this library, you may extend
+// this exception to your version of the library, but you are not
+// obligated to do so.  If you do not wish to do so, delete this
+// exception statement from your version.
+
+using System;
+using System.IO;
+
+namespace ICSharpCode.SharpZipLib.GZip
+{
+
+	/// <summary>
+	/// An example class to demonstrate compression and decompression of GZip streams.
+	/// </summary>
+	public static class GZip
+	{
+		/// <summary>
+		/// Decompress the <paramref name="inStream">input</paramref> writing 
+		/// uncompressed data to the <paramref name="outStream">output stream</paramref>
+		/// </summary>
+		/// <param name="inStream">The readable stream containing data to decompress.</param>
+		/// <param name="outStream">The output stream to receive the decompressed data.</param>
+		/// <param name="isStreamOwner">Both streams are closed on completion if true.</param>
+		public static void Decompress(Stream inStream, Stream outStream, bool isStreamOwner)
+		{
+			if (inStream == null || outStream == null) {
+				throw new Exception("Null Stream");
+			}
+
+			try {
+				using (GZipInputStream bzipInput = new GZipInputStream(inStream)) {
+					bzipInput.IsStreamOwner = isStreamOwner;
+					Core.StreamUtils.Copy(bzipInput, outStream, new byte[4096]);
+				}
+			} finally {
+				if (isStreamOwner) {
+					// inStream is closed by the GZipInputStream if stream owner
+					outStream.Close();
+				}
+			}
+		}
+
+		/// <summary>
+		/// Compress the <paramref name="inStream">input stream</paramref> sending 
+		/// result data to <paramref name="outStream">output stream</paramref>
+		/// </summary>
+		/// <param name="inStream">The readable stream to compress.</param>
+		/// <param name="outStream">The output stream to receive the compressed data.</param>
+		/// <param name="isStreamOwner">Both streams are closed on completion if true.</param>
+		/// <param name="level">Block size acts as compression level (1 to 9) with 1 giving 
+		/// the lowest compression and 9 the highest.</param>
+		public static void Compress(Stream inStream, Stream outStream, bool isStreamOwner, int level)
+		{
+			if (inStream == null || outStream == null) {
+				throw new Exception("Null Stream");
+			}
+
+			try {
+				using (GZipOutputStream bzipOutput = new GZipOutputStream(outStream, level)) {
+					bzipOutput.IsStreamOwner = isStreamOwner;
+					Core.StreamUtils.Copy(inStream, bzipOutput, new byte[4096]);
+				}
+			} finally {
+				if (isStreamOwner) {
+					// outStream is closed by the GZipOutputStream if stream owner
+					inStream.Close();
+				}
+			}
+		}
+
+	}
+}

ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.csproj

@@ -94,6 +94,7 @@
     <Compile Include="Encryption\PkzipClassic.cs" />
     <Compile Include="Encryption\ZipAESStream.cs" />
     <Compile Include="Encryption\ZipAESTransform.cs" />
+    <Compile Include="GZip\GZip.cs" />
     <Compile Include="GZip\GZipConstants.cs" />
     <Compile Include="GZip\GZipException.cs" />
     <Compile Include="GZip\GzipInputStream.cs" />