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
  12 #ifndef _WX_WXMMSTREAM_H__
  13 #define _WX_WXMMSTREAM_H__
  14
  15 #include "wx/stream.h"
  16
  17 #if wxUSE_STREAMS
  18
  19 class WXDLLEXPORT wxMemoryInputStream : public wxInputStream
  20 {
  21 public:
  22     wxMemoryInputStream(const char *data, size_t length);
  23     virtual ~wxMemoryInputStream();
  24     virtual size_t GetSize() const { return m_length; }
  25     virtual bool Eof() const;
  26
  27     char Peek();
  28
  29     wxStreamBuffer *InputStreamBuffer() const { return m_i_streambuf; }
  30
  31 protected:
  32     wxStreamBuffer *m_i_streambuf;
  33
  34     size_t OnSysRead(void *buffer, size_t nbytes);
  35     off_t OnSysSeek(off_t pos, wxSeekMode mode);
  36     off_t OnSysTell() const;
  37
  38 private:
  39     size_t m_length;
  40 };
  41
  42 class WXDLLEXPORT wxMemoryOutputStream : public wxOutputStream
  43 {
  44 public:
  45     wxMemoryOutputStream(char *data = NULL, size_t length = 0);
  46     virtual ~wxMemoryOutputStream();
  47     virtual size_t GetSize() const { return m_o_streambuf->GetLastAccess(); }
  48
  49     wxStreamBuffer *OutputStreamBuffer() const { return m_o_streambuf; }
  50
  51     size_t CopyTo(char *buffer, size_t len) const;
  52
  53 protected:
  54     wxStreamBuffer *m_o_streambuf;
  55
  56 protected:
  57     size_t OnSysWrite(const void *buffer, size_t nbytes);
  58     off_t OnSysSeek(off_t pos, wxSeekMode mode);
  59     off_t OnSysTell() const;
  60 };
  61
  62 #endif
  63   // wxUSE_STREAMS
  64
  65 #endif
  66   // _WX_WXMMSTREAM_H__
  67