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fix wxBitmapComboBox Gtk-CRITICAL assertion `GTK_IS_ENTRY (entry)' failed
[wxWidgets.git] / include / wx / sstream.h
1 ///////////////////////////////////////////////////////////////////////////////
2 // Name: wx/sstream.h
3 // Purpose: string-based streams
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 2004-09-19
7 // RCS-ID: $Id$
8 // Copyright: (c) 2004 Vadim Zeitlin <vadim@wxwindows.org>
9 // Licence: wxWindows licence
10 ///////////////////////////////////////////////////////////////////////////////
11
12 #ifndef _WX_SSTREAM_H_
13 #define _WX_SSTREAM_H_
14
15 #include "wx/stream.h"
16
17 #if wxUSE_STREAMS
18
19 // ----------------------------------------------------------------------------
20 // wxStringInputStream is a stream reading from the given (fixed size) string
21 // ----------------------------------------------------------------------------
22
23 class WXDLLIMPEXP_BASE wxStringInputStream : public wxInputStream
24 {
25 public:
26 // ctor associates the stream with the given string which makes a copy of
27 // it
28 wxStringInputStream(const wxString& s);
29
30 virtual wxFileOffset GetLength() const;
31 virtual bool IsSeekable() const { return true; }
32
33 protected:
34 virtual wxFileOffset OnSysSeek(wxFileOffset ofs, wxSeekMode mode);
35 virtual wxFileOffset OnSysTell() const;
36 virtual size_t OnSysRead(void *buffer, size_t size);
37
38 private:
39 // the string that was passed in the ctor
40 wxString m_str;
41
42 // the buffer we're reading from
43 wxCharBuffer m_buf;
44
45 // length of the buffer we're reading from
46 size_t m_len;
47
48 // position in the stream in bytes, *not* in chars
49 size_t m_pos;
50
51 wxDECLARE_NO_COPY_CLASS(wxStringInputStream);
52 };
53
54 // ----------------------------------------------------------------------------
55 // wxStringOutputStream writes data to the given string, expanding it as needed
56 // ----------------------------------------------------------------------------
57
58 class WXDLLIMPEXP_BASE wxStringOutputStream : public wxOutputStream
59 {
60 public:
61 // The stream will write data either to the provided string or to an
62 // internal string which can be retrieved using GetString()
63 //
64 // Note that the conversion object should have the life time greater than
65 // this stream.
66 wxStringOutputStream(wxString *pString = NULL,
67 wxMBConv& conv = wxConvUTF8)
68 : m_conv(conv)
69 #if wxUSE_UNICODE
70 , m_unconv(0)
71 #endif // wxUSE_UNICODE
72 {
73 m_str = pString ? pString : &m_strInternal;
74 m_pos = m_str->length() / sizeof(wxChar);
75 }
76
77 // get the string containing current output
78 const wxString& GetString() const { return *m_str; }
79
80 virtual bool IsSeekable() const { return true; }
81
82 protected:
83 virtual wxFileOffset OnSysTell() const;
84 virtual size_t OnSysWrite(const void *buffer, size_t size);
85
86 private:
87 // internal string, not used if caller provided his own string
88 wxString m_strInternal;
89
90 // pointer given by the caller or just pointer to m_strInternal
91 wxString *m_str;
92
93 // position in the stream in bytes, *not* in chars
94 size_t m_pos;
95
96 // converter to use: notice that with the default UTF-8 one the input
97 // stream must contain valid UTF-8 data, use wxConvISO8859_1 to work with
98 // arbitrary 8 bit data
99 wxMBConv& m_conv;
100
101 #if wxUSE_UNICODE
102 // unconverted data from the last call to OnSysWrite()
103 wxMemoryBuffer m_unconv;
104 #endif // wxUSE_UNICODE
105
106 wxDECLARE_NO_COPY_CLASS(wxStringOutputStream);
107 };
108
109 #endif // wxUSE_STREAMS
110
111 #endif // _WX_SSTREAM_H_
112