include/wx/zipstream.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        zipstream.h
   3 // Purpose:     wxZipInputStream for reading files from ZIP archive
   4 // Author:      Vaclav Slavik
   5 // Copyright:   (c) 1999 Vaclav Slavik
   6 // Licence:     wxWindows Licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 #ifndef __ZIPSTREAM_H__
  10 #define __ZIPSTREAM_H__
  11
  12 #ifdef __GNUG__
  13 #pragma interface
  14 #endif
  15
  16 #if wxUSE_ZLIB && wxUSE_STREAMS
  17
  18 #include <wx/stream.h>
  19
  20 //--------------------------------------------------------------------------------
  21 // wxZipInputStream
  22 //                  This class is input stream from ZIP archive. The archive
  23 //                  must be local file (accessible via FILE*)
  24 //--------------------------------------------------------------------------------
  25
  26
  27 class WXDLLEXPORT wxZipInputStream : public wxInputStream
  28 {
  29     private:
  30         size_t m_Size;
  31         off_t m_Pos;
  32         void *m_Archive;
  33                 // this void* is handle of archive .
  34                 // I'm sorry it is void and not proper type but I don't want
  35                 // to make unzip.h header public.
  36
  37     public:
  38         wxZipInputStream(const wxString& archive, const wxString& file);
  39                 // archive is name of .zip archive, file is name of file to be extracted.
  40                 // Remember that archive must be local file accesible via fopen, fread functions!
  41         ~wxZipInputStream();
  42
  43     protected:
  44         virtual size_t StreamSize() const {return m_Size;}
  45         virtual size_t OnSysRead(void *buffer, size_t bufsize);
  46         virtual off_t OnSysSeek(off_t seek, wxSeekMode mode);
  47         virtual off_t OnSysTell() const {return m_Pos;}
  48 };
  49
  50
  51 #endif // if use_zlib && use_streams
  52
  53 #endif // __ZIPSTREAM_H__
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