include/wx/mstream.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mstream.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_WXMMSTREAM_H__
  12 #define _WX_WXMMSTREAM_H__
  13
  14 #include "wx/stream.h"
  15
  16 #if wxUSE_STREAMS
  17
  18 class WXDLLEXPORT wxMemoryInputStream: public wxInputStream {
  19  private:
  20   size_t m_length;
  21
  22  public:
  23   wxMemoryInputStream(const char *data, size_t length);
  24   virtual ~wxMemoryInputStream();
  25   virtual size_t GetSize() const { return m_length; }
  26
  27   char Peek();
  28
  29   wxStreamBuffer *InputStreamBuffer() const { return m_i_streambuf; }
  30
  31  protected:
  32   wxStreamBuffer *m_i_streambuf;
  33
  34  protected:
  35   size_t OnSysRead(void *buffer, size_t nbytes);
  36   off_t OnSysSeek(off_t pos, wxSeekMode mode);
  37   off_t OnSysTell() const;
  38 };
  39
  40 class WXDLLEXPORT wxMemoryOutputStream:  public wxOutputStream {
  41  public:
  42   wxMemoryOutputStream(char *data = NULL, size_t length = 0);
  43   virtual ~wxMemoryOutputStream();
  44   virtual size_t GetSize() const { return m_o_streambuf->GetLastAccess(); }
  45
  46   wxStreamBuffer *OutputStreamBuffer() const { return m_o_streambuf; }
  47
  48   size_t CopyTo(char *buffer, size_t len) const;
  49
  50  protected:
  51   wxStreamBuffer *m_o_streambuf;
  52
  53  protected:
  54   size_t OnSysWrite(const void *buffer, size_t nbytes);
  55   off_t OnSysSeek(off_t pos, wxSeekMode mode);
  56   off_t OnSysTell() const;
  57 };
  58
  59 #endif
  60   // wxUSE_STREAMS
  61
  62 #endif
  63   // _WX_WXMMSTREAM_H__
  64