class/WindowsBase/ZipSharp/ZipArchive.cs

   1 // ZipArchive.cs created with MonoDevelop
   2 // User: alan at 16:31 20/10/2008
   3 //
   4 // To change standard headers go to Edit->Preferences->Coding->Standard Headers
   5 //
   6
   7 using System;
   8 using System.IO;
   9 using System.IO.Packaging;
  10
  11 namespace zipsharp
  12 {
  13         class ZipArchive : IDisposable
  14         {
  15                 internal bool FileActive { get; set; }
  16                 internal ZipHandle Handle { get; private set; }
  17                 ZipStream Stream { get; set; }
  18
  19                 public ZipArchive (string filename, Append append)
  20                         : this (File.Open (filename, FileMode.OpenOrCreate), append)
  21                 {
  22
  23                 }
  24
  25                 public ZipArchive (Stream stream, Append append)
  26                         : this (stream, append, false)
  27                 {
  28
  29                 }
  30
  31                 public ZipArchive (Stream stream, Append append, bool ownsStream)
  32                 {
  33                         Stream = new ZipStream (stream, ownsStream);
  34                         Handle = NativeZip.OpenArchive (Stream.IOFunctions, append);
  35                 }
  36
  37
  38                 static int ConvertCompression (System.IO.Packaging.CompressionOption option)
  39                 {
  40                         switch (option)
  41                         {
  42                         case CompressionOption.SuperFast:
  43                                 return 2;
  44
  45                         case CompressionOption.Fast:
  46                                 return 4;
  47
  48                         case CompressionOption.Normal:
  49                                 return 6;
  50
  51                         case CompressionOption.Maximum:
  52                                 return 9;
  53
  54                         default:
  55                                 return 0;
  56                         }
  57                 }
  58
  59
  60                 public Stream GetStream (string filename, System.IO.Packaging.CompressionOption option)
  61                 {
  62                         if (FileActive)
  63                                 throw new InvalidOperationException ("A file is already open");
  64
  65                         NativeZip.OpenFile (Handle, filename, ConvertCompression (option));
  66                         return new ZipWriteStream (this);
  67                 }
  68
  69                 public void Dispose ()
  70                 {
  71                         NativeZip.CloseArchive (Handle);
  72                         Stream.Close ();
  73                 }
  74         }
  75 }