include/wx/zstream.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        zstream.h
   3 // Purpose:     Memory stream classes
   4 // Author:      Guilhem Lavaux
   5 // Modified by:
   6 // Created:     11/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Guilhem Lavaux
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11 #ifndef _WX_WXZSTREAM_H__
  12 #define _WX_WXZSTREAM_H__
  13
  14 #ifdef __GNUG__
  15 #pragma interface
  16 #endif
  17
  18 #include <wx/stream.h>
  19
  20 class wxZlibInputStream: public wxFilterInputStream {
  21  public:
  22   wxZlibInputStream(wxInputStream& stream);
  23   virtual ~wxZlibInputStream();
  24
  25   bool Eof() const;
  26
  27  protected:
  28   size_t DoRead(void *buffer, size_t size);
  29   off_t DoSeekInput(off_t WXUNUSED(pos), wxSeekMode WXUNUSED(mode)) { return wxInvalidOffset; }
  30   off_t DoTellInput() const { return wxInvalidOffset; }
  31
  32  protected:
  33   size_t m_z_size;
  34   unsigned char *m_z_buffer;
  35   struct z_stream_s *m_inflate;
  36 };
  37
  38 class wxZlibOutputStream: public wxFilterOutputStream {
  39  public:
  40   wxZlibOutputStream(wxOutputStream& stream);
  41   virtual ~wxZlibOutputStream();
  42
  43   void Sync();
  44
  45   bool Bad() const;
  46
  47  protected:
  48   size_t DoWrite(const void *buffer, size_t size);
  49   off_t DoSeekOutput(off_t WXUNUSED(pos), wxSeekMode WXUNUSED(mode)) { return wxInvalidOffset; }
  50   off_t DoTellOutput() const { return wxInvalidOffset; }
  51
  52  protected:
  53   size_t m_z_size;
  54   unsigned char *m_z_buffer;
  55   struct z_stream_s *m_deflate;
  56 };
  57
  58 #endif