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