// BZip2.cs
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//
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// Copyright (C) 2010 David Pierson
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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// Linking this library statically or dynamically with other modules is
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// making a combined work based on this library. Thus, the terms and
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// conditions of the GNU General Public License cover the whole
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// combination.
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//
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// As a special exception, the copyright holders of this library give you
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// permission to link this library with independent modules to produce an
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// executable, regardless of the license terms of these independent
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// modules, and to copy and distribute the resulting executable under
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// terms of your choice, provided that you also meet, for each linked
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// independent module, the terms and conditions of the license of that
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// module. An independent module is a module which is not derived from
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// or based on this library. If you modify this library, you may extend
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// this exception to your version of the library, but you are not
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// obligated to do so. If you do not wish to do so, delete this
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// exception statement from your version.
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// Suppress this in CF and 1.1, not needed. Static classes introduced in C# version 2.0
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#if !NETCF_2_0 && !NET_1_1
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using System;
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using System.IO;
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namespace HH.WMS.Utils.ZipLib.BZip2 {
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/// <summary>
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/// An example class to demonstrate compression and decompression of BZip2 streams.
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/// </summary>
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public static class BZip2
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{
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/// <summary>
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/// Decompress the <paramref name="inStream">input</paramref> writing
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/// uncompressed data to the <paramref name="outStream">output stream</paramref>
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/// </summary>
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/// <param name="inStream">The readable stream containing data to decompress.</param>
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/// <param name="outStream">The output stream to receive the decompressed data.</param>
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/// <param name="isStreamOwner">Both streams are closed on completion if true.</param>
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public static void Decompress(Stream inStream, Stream outStream, bool isStreamOwner)
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{
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if (inStream == null || outStream == null) {
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throw new Exception("Null Stream");
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}
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try {
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using (BZip2InputStream bzipInput = new BZip2InputStream(inStream)) {
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bzipInput.IsStreamOwner = isStreamOwner;
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Core.StreamUtils.Copy(bzipInput, outStream, new byte[4096]);
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}
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} finally {
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if (isStreamOwner) {
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// inStream is closed by the BZip2InputStream if stream owner
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outStream.Close();
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}
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}
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}
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/// <summary>
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/// Compress the <paramref name="inStream">input stream</paramref> sending
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/// result data to <paramref name="outStream">output stream</paramref>
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/// </summary>
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/// <param name="inStream">The readable stream to compress.</param>
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/// <param name="outStream">The output stream to receive the compressed data.</param>
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/// <param name="isStreamOwner">Both streams are closed on completion if true.</param>
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/// <param name="level">Block size acts as compression level (1 to 9) with 1 giving
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/// the lowest compression and 9 the highest.</param>
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public static void Compress(Stream inStream, Stream outStream, bool isStreamOwner, int level)
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{
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if (inStream == null || outStream == null) {
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throw new Exception("Null Stream");
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}
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try {
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using (BZip2OutputStream bzipOutput = new BZip2OutputStream(outStream, level)) {
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bzipOutput.IsStreamOwner = isStreamOwner;
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Core.StreamUtils.Copy(inStream, bzipOutput, new byte[4096]);
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}
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} finally {
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if (isStreamOwner) {
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// outStream is closed by the BZip2OutputStream if stream owner
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inStream.Close();
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}
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}
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}
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}
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}
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#endif
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