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