class/WindowsBase/ZipSharp/NativeZip.cs

   1 // Native.cs created with MonoDevelop
   2 // User: alan at 12:18 13/10/2008
   3 //
   4 // To change standard headers go to Edit->Preferences->Coding->Standard Headers
   5 //
   6
   7
   8 using System;
   9 using System.Runtime.InteropServices;
  10
  11 namespace zipsharp
  12 {
  13         static class NativeZip
  14         {
  15                 const int DEFAULT_COMPRESSION = 0;
  16                 const int Z_DEFLATED = 8;
  17
  18                 public static void CloseArchive (ZipHandle handle)
  19                 {
  20                         CloseArchive (handle, null);
  21                 }
  22
  23                 public static void CloseArchive (ZipHandle handle, string comment)
  24                 {
  25                         zipClose (handle, comment);
  26                         handle.SetHandleAsInvalid ();
  27                 }
  28
  29                 public static void CloseFile (ZipHandle handle)
  30                 {
  31                         zipCloseFileInZip (handle);
  32                 }
  33
  34                 public static ZipHandle OpenArchive (ZlibFileFuncDef funcDef, Append append)
  35                 {
  36                         ZipHandle h = zipOpen2 ("", (int) append, IntPtr.Zero, ref funcDef);
  37                         if (h.IsInvalid)
  38                                 throw new Exception ("Could not open the zip archive");
  39                         return h;
  40                 }
  41
  42                 public static int OpenFile (ZipHandle handle, string filename)
  43                 {
  44                         return OpenFile (handle, filename, DEFAULT_COMPRESSION);
  45                 }
  46
  47                 public static int OpenFile (ZipHandle handle, string filename, int compressionLevel)
  48                 {
  49                         ZipFileInfo fileInfo = new ZipFileInfo (DateTime.Now);
  50                         int method = compressionLevel == 0 ? 0 : Z_DEFLATED;
  51                         return zipOpenNewFileInZip (handle, filename, ref fileInfo, IntPtr.Zero, 0, IntPtr.Zero, 0, "", method, compressionLevel);
  52                 }
  53
  54                 public static unsafe void Write (ZipHandle handle, byte[] buffer, int offset, uint count)
  55                 {
  56                         fixed (byte* b = &buffer[offset])
  57                                 zipWriteInFileInZip (handle, b, count);
  58                 }
  59
  60                 [DllImport ("MonoPosixHelper")]
  61                 static extern unsafe int zipWriteInFileInZip (ZipHandle handle,
  62                                                                byte* buffer,
  63                                                                uint len);
  64
  65                 [DllImport ("MonoPosixHelper")]
  66                 static extern int zipCloseFileInZip (ZipHandle handle);
  67
  68                 [DllImport ("MonoPosixHelper")]
  69                 static extern ZipHandle zipOpen2 (string pathname,
  70                                                   int append,
  71                                                   IntPtr globalcomment, // zipcharpc*
  72                                                   ref ZlibFileFuncDef pzlib_filefunc_def); // zlib_filefunc_def*
  73
  74
  75                 [DllImport ("MonoPosixHelper")]
  76                 static extern int zipClose (ZipHandle handle, string globalComment);
  77
  78                 [DllImport ("MonoPosixHelper")]
  79                 static extern int zipOpenNewFileInZip (ZipHandle handle,
  80                                                        string filename,
  81                                                        ref ZipFileInfo zipfi,
  82                                                        IntPtr extrafield_local,
  83                                                        uint size_extrafield_local,
  84                                                        IntPtr extrafield_global,
  85                                                        uint size_extrafield_global,
  86                                                        string comment,
  87                                                        int method,
  88                                                        int level);
  89         }
  90 }