mcs/class/WindowsBase/ZipSharp/UnzipArchive.cs

   1 // UnzipArchive.cs
   2 //
   3 // Copyright (c) 2008 [copyright holders]
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining a copy
   6 // of this software and associated documentation files (the "Software"), to deal
   7 // in the Software without restriction, including without limitation the rights
   8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 // copies of the Software, and to permit persons to whom the Software is
  10 // furnished to do so, subject to the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be included in
  13 // all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21 // THE SOFTWARE.
  22 //
  23 //
  24
  25 using System;
  26 using System.IO;
  27
  28 namespace zipsharp
  29 {
  30         class UnzipArchive : IDisposable
  31         {
  32                 string[] files;
  33
  34                 internal bool FileActive {
  35                         get; set;
  36                 }
  37
  38                 string[] Files {
  39                         get {
  40                                 if (files == null)
  41                                         files = NativeVersion.Use32Bit ? NativeUnzip.GetFiles32 (Handle) : NativeUnzip.GetFiles64 (Handle);
  42                                 return files;
  43                         }
  44                 }
  45
  46                 internal UnzipHandle Handle {
  47                         get; private set;
  48                 }
  49
  50                 ZipStream Stream {
  51                         get; set;
  52                 }
  53
  54                 public UnzipArchive (string filename)
  55                         : this (File.Open (filename, FileMode.Open), true)
  56                 {
  57
  58                 }
  59
  60                 public UnzipArchive (Stream stream)
  61                         : this (stream, false)
  62                 {
  63
  64                 }
  65
  66                 public UnzipArchive (Stream stream, bool ownsStream)
  67                 {
  68                         Stream = new ZipStream (stream, ownsStream);
  69                         Handle = NativeVersion.Use32Bit ? NativeUnzip.OpenArchive32 (Stream.IOFunctions32) : NativeUnzip.OpenArchive64 (Stream.IOFunctions64);
  70                 }
  71
  72                 public void Dispose ()
  73                 {
  74                         NativeUnzip.CloseArchive (Handle);
  75                         Stream.Close ();
  76                 }
  77
  78                 public System.IO.Packaging.CompressionOption GetCompressionLevel (string file)
  79                 {
  80                         using (UnzipReadStream stream = (UnzipReadStream) GetStream (file))
  81                                 return stream.CompressionLevel;
  82                 }
  83
  84                 public string[] GetFiles ()
  85                 {
  86                         return (string []) Files.Clone ();
  87                 }
  88
  89                 public Stream GetStream (string name)
  90                 {
  91                         foreach (string file in Files)
  92                         {
  93                                 if (name.Equals(file, StringComparison.OrdinalIgnoreCase))
  94                                 {
  95                                         System.IO.Packaging.CompressionOption option;
  96                                         NativeUnzip.OpenFile (Handle, name, out option);
  97                                         return new UnzipReadStream (this, option);
  98                                 }
  99                         }
 100
 101                         throw new Exception ("The file doesn't exist in the zip archive");
 102                 }
 103         }
 104 }