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 __WXZSTREAM_H__
  12 #define __WXZSTREAM_H__
  13
  14 #ifdef __GNUG__
  15 #pragma interface
  16 #endif
  17
  18 #include <wx/stream.h>
  19 #include "../../src/zlib/zlib.h"
  20
  21 class wxZlibInputStream: public wxFilterInputStream {
  22  public:
  23   wxZlibInputStream(wxInputStream& stream);
  24   virtual ~wxZlibInputStream();
  25
  26   wxInputStream& Read(void *buffer, size_t size);
  27   off_t SeekI(off_t pos, wxSeekMode mode = wxFromStart);
  28   off_t TellI() const;
  29
  30   size_t LastRead() const { return m_lastread; }
  31   bool Eof() const;
  32
  33  protected:
  34   size_t m_lastread;
  35   size_t m_z_size;
  36   unsigned char *m_z_buffer;
  37   bool m_eof;
  38   struct z_stream_s m_inflate;
  39 };
  40
  41 class wxZlibOutputStream: public wxFilterOutputStream {
  42  public:
  43   wxZlibOutputStream(wxOutputStream& stream);
  44   virtual ~wxZlibOutputStream();
  45
  46   wxOutputStream& Write(const void *buffer, size_t size);
  47   off_t SeekO(off_t pos, wxSeekMode mode = wxFromStart);
  48   off_t TellO() const;
  49
  50   size_t LastWrite() const { return m_lastwrite; }
  51   bool Bad() const;
  52
  53  protected:
  54   size_t m_lastwrite;
  55   size_t m_z_size;
  56   unsigned char *m_z_buffer;
  57   bool m_bad;
  58   struct z_stream_s m_deflate;
  59 };
  60
  61 #endif