[wip] bzip2

Author: Numpsy

src/ICSharpCode.SharpZipLib/Zip/ZipEntry.cs

@@ -1278,7 +1278,8 @@ public static bool IsCompressionMethodSupported(CompressionMethod method)
 		{
 			return
 				(method == CompressionMethod.Deflated) ||
-				(method == CompressionMethod.Stored);
+				(method == CompressionMethod.Stored) ||
+				(method == CompressionMethod.BZip2);
 		}
 
 		/// <summary>

src/ICSharpCode.SharpZipLib/Zip/ZipFile.cs

@@ -882,6 +882,10 @@ public Stream GetInputStream(long entryIndex)
 					result = new InflaterInputStream(result, new Inflater(true));
 					break;
 
+				case CompressionMethod.BZip2:
+					result = new BZip2.BZip2InputStream(result);
+					break;
+
 				default:
 					throw new ZipException("Unsupported compression method " + method);
 			}
@@ -2580,6 +2584,14 @@ private Stream GetOutputStream(ZipEntry entry)
 					result = dos;
 					break;
 
+				case CompressionMethod.BZip2:
+					var bzos = new BZip2.BZip2OutputStream(result)
+					{
+						IsStreamOwner = false
+					};
+					result = bzos;
+					break;
+
 				default:
 					throw new ZipException("Unknown compression method " + entry.CompressionMethod);
 			}