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 #include "../zlib/zlib.h"
  20
  21 class wxZlibInputStream: public wxFilterInputStream {
  22  public:
  23   wxZlibInputStream(wxInputStream& stream);
  24   virtual ~wxZlibInputStream();
  25
  26   bool Eof() const;
  27
  28  protected:
  29   size_t DoRead(void *buffer, size_t size);
  30   off_t DoSeekInput(off_t WXUNUSED(pos), wxSeekMode WXUNUSED(mode)) { return wxInvalidOffset; }
  31   off_t DoTellInput() const { return wxInvalidOffset; }
  32
  33  protected:
  34   size_t m_z_size;
  35   unsigned char *m_z_buffer;
  36   struct z_stream_s m_inflate;
  37 };
  38
  39 class wxZlibOutputStream: public wxFilterOutputStream {
  40  public:
  41   wxZlibOutputStream(wxOutputStream& stream);
  42   virtual ~wxZlibOutputStream();
  43
  44   void Sync();
  45
  46   bool Bad() const;
  47
  48  protected:
  49   size_t DoWrite(const void *buffer, size_t size);
  50   off_t DoSeekOutput(off_t WXUNUSED(pos), wxSeekMode WXUNUSED(mode)) { return wxInvalidOffset; }
  51   off_t DoTellOutput() const { return wxInvalidOffset; }
  52
  53  protected:
  54   size_t m_z_size;
  55   unsigned char *m_z_buffer;
  56   struct z_stream_s m_deflate;
  57 };
  58
  59 #endif