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: mstream.h 53135 2008-04-12 02:31:04Z VZ $
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
21class WXDLLIMPEXP_FWD_BASE wxMemoryOutputStream;
22
23class WXDLLIMPEXP_BASE wxMemoryInputStream : public wxInputStream
24{
25public:
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
41protected:
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
48private:
49    size_t m_length;
50
51    DECLARE_NO_COPY_CLASS(wxMemoryInputStream)
52};
53
54class WXDLLIMPEXP_BASE wxMemoryOutputStream : public wxOutputStream
55{
56public:
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
72protected:
73    wxStreamBuffer *m_o_streambuf;
74
75protected:
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__
93