class/System/System.IO.Compression/GZipStream.cs

   1 /* -*- Mode: csharp; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 //
   3 // GZipStream.cs
   4 //
   5 // Authors:
   6 //      Christopher James Lahey <clahey@ximian.com>
   7 //
   8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   9 //
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 #if NET_2_0
  32 using System;
  33 using System.IO;
  34 using System.Runtime.InteropServices;
  35 using System.Runtime.Remoting.Messaging;
  36
  37 namespace System.IO.Compression {
  38
  39         public class GZipStream : Stream
  40         {
  41                 private DeflateStream deflateStream;
  42
  43                 public GZipStream (Stream compressedStream, CompressionMode mode) :
  44                         this (compressedStream, mode, false) {
  45                 }
  46
  47                 public GZipStream (Stream compressedStream, CompressionMode mode, bool leaveOpen) {
  48                         this.deflateStream = new DeflateStream (compressedStream, mode, leaveOpen, true);
  49                 }
  50
  51                 protected override void Dispose (bool disposing)
  52                 {
  53                         if (disposing)
  54                                 deflateStream.Dispose ();
  55                         base.Dispose (disposing);
  56                 }
  57
  58                 public override int Read (byte[] dest, int dest_offset, int count)
  59                 {
  60                         return deflateStream.Read(dest, dest_offset, count);
  61                 }
  62
  63
  64                 public override void Write (byte[] src, int src_offset, int count)
  65                 {
  66                         deflateStream.Write (src, src_offset, count);
  67                 }
  68
  69                 public override void Flush() {
  70                         deflateStream.Flush();
  71                 }
  72
  73                 public override long Seek (long offset, SeekOrigin origin) {
  74                         return deflateStream.Seek (offset, origin);
  75                 }
  76
  77                 public override void SetLength (long value) {
  78                         deflateStream.SetLength (value);
  79                 }
  80
  81                 public override IAsyncResult BeginRead (byte [] buffer, int offset, int count,
  82                                                         AsyncCallback cback, object state)
  83                 {
  84                         return deflateStream.BeginRead (buffer, offset, count, cback, state);
  85                 }
  86
  87                 public override IAsyncResult BeginWrite (byte [] buffer, int offset, int count,
  88                                                         AsyncCallback cback, object state)
  89                 {
  90                         return deflateStream.BeginWrite (buffer, offset, count, cback, state);
  91                 }
  92
  93                 public override int EndRead(IAsyncResult async_result) {
  94                         return deflateStream.EndRead (async_result);
  95                 }
  96
  97                 public override void EndWrite (IAsyncResult async_result)
  98                 {
  99                         deflateStream.EndWrite (async_result);
 100                 }
 101
 102                 public Stream BaseStream {
 103                         get {
 104                                 return deflateStream.BaseStream;
 105                         }
 106                 }
 107                 public override bool CanRead {
 108                         get {
 109                                 return deflateStream.CanRead;
 110                         }
 111                 }
 112                 public override bool CanSeek {
 113                         get {
 114                                 return deflateStream.CanSeek;
 115                         }
 116                 }
 117                 public override bool CanWrite {
 118                         get {
 119                                 return deflateStream.CanWrite;
 120                         }
 121                 }
 122                 public override long Length {
 123                         get {
 124                                 return deflateStream.Length;
 125                         }
 126                 }
 127                 public override long Position {
 128                         get {
 129                                 return deflateStream.Position;
 130                         }
 131                         set {
 132                                 deflateStream.Position = value;
 133                         }
 134                 }
 135         }
 136 }
 137
 138 #endif