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 WXDLLEXPORT wxMemoryInputStream : public wxInputStream
  20 {
  21 public:
  22     wxMemoryInputStream(const void *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 *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     off_t OnSysSeek(off_t pos, wxSeekMode mode);
  39     off_t OnSysTell() const;
  40
  41 private:
  42     size_t m_length;
  43 };
  44
  45 class WXDLLEXPORT wxMemoryOutputStream : public wxOutputStream
  46 {
  47 public:
  48     // if data is !NULL it must be allocated with malloc()
  49     wxMemoryOutputStream(void *data = NULL, size_t length = 0);
  50     virtual ~wxMemoryOutputStream();
  51     virtual size_t GetSize() const { return m_o_streambuf->GetLastAccess(); }
  52
  53     size_t CopyTo(void *buffer, size_t len) const;
  54
  55     wxStreamBuffer *GetOutputStreamBuffer() const { return m_o_streambuf; }
  56
  57     // deprecated, compatibility only
  58     wxStreamBuffer *OutputStreamBuffer() const { return m_o_streambuf; }
  59
  60 protected:
  61     wxStreamBuffer *m_o_streambuf;
  62
  63 protected:
  64     size_t OnSysWrite(const void *buffer, size_t nbytes);
  65     off_t OnSysSeek(off_t pos, wxSeekMode mode);
  66     off_t OnSysTell() const;
  67 };
  68
  69 #endif
  70   // wxUSE_STREAMS
  71
  72 #endif
  73   // _WX_WXMMSTREAM_H__
  74