include/wx/mstream.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/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/defs.h"
  16
  17 #if wxUSE_STREAMS
  18
  19 #include "wx/stream.h"
  20
  21 class WXDLLIMPEXP_BASE wxMemoryOutputStream;
  22
  23 class WXDLLIMPEXP_BASE wxMemoryInputStream : public wxInputStream
  24 {
  25 public:
  26     wxMemoryInputStream(const void *data, size_t length);
  27     wxMemoryInputStream(const wxMemoryOutputStream& stream);
  28     virtual ~wxMemoryInputStream();
  29     virtual wxFileOffset GetLength() const { return m_length; }
  30     virtual bool IsSeekable() const { return true; }
  31
  32     char Peek();
  33
  34     wxStreamBuffer *GetInputStreamBuffer() const { return m_i_streambuf; }
  35
  36 #if WXWIN_COMPATIBILITY_2_6
  37     // deprecated, compatibility only
  38     wxDEPRECATED( wxStreamBuffer *InputStreamBuffer() const );
  39 #endif // WXWIN_COMPATIBILITY_2_6
  40
  41 protected:
  42     wxStreamBuffer *m_i_streambuf;
  43
  44     size_t OnSysRead(void *buffer, size_t nbytes);
  45     wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
  46     wxFileOffset OnSysTell() const;
  47
  48 private:
  49     size_t m_length;
  50
  51     DECLARE_NO_COPY_CLASS(wxMemoryInputStream)
  52 };
  53
  54 class WXDLLIMPEXP_BASE wxMemoryOutputStream : public wxOutputStream
  55 {
  56 public:
  57     // if data is !NULL it must be allocated with malloc()
  58     wxMemoryOutputStream(void *data = NULL, size_t length = 0);
  59     virtual ~wxMemoryOutputStream();
  60     virtual wxFileOffset GetLength() const { return m_o_streambuf->GetLastAccess(); }
  61     virtual bool IsSeekable() const { return true; }
  62
  63     size_t CopyTo(void *buffer, size_t len) const;
  64
  65     wxStreamBuffer *GetOutputStreamBuffer() const { return m_o_streambuf; }
  66
  67 #if WXWIN_COMPATIBILITY_2_6
  68     // deprecated, compatibility only
  69     wxDEPRECATED( wxStreamBuffer *OutputStreamBuffer() const );
  70 #endif // WXWIN_COMPATIBILITY_2_6
  71
  72 protected:
  73     wxStreamBuffer *m_o_streambuf;
  74
  75 protected:
  76     size_t OnSysWrite(const void *buffer, size_t nbytes);
  77     wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
  78     wxFileOffset OnSysTell() const;
  79
  80     DECLARE_NO_COPY_CLASS(wxMemoryOutputStream)
  81 };
  82
  83 #if WXWIN_COMPATIBILITY_2_6
  84     inline wxStreamBuffer *wxMemoryInputStream::InputStreamBuffer() const { return m_i_streambuf; }
  85     inline wxStreamBuffer *wxMemoryOutputStream::OutputStreamBuffer() const { return m_o_streambuf; }
  86 #endif // WXWIN_COMPATIBILITY_2_6
  87
  88 #endif
  89   // wxUSE_STREAMS
  90
  91 #endif
  92   // _WX_WXMMSTREAM_H__