1 ////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (C) 1993-2021 The Octave Project Developers
4 //
5 // See the file COPYRIGHT.md in the top-level directory of this
6 // distribution or <https://octave.org/copyright/>.
7 //
8 // This file is part of Octave.
9 //
10 // Octave is free software: you can redistribute it and/or modify it
11 // under the terms of the GNU General Public License as published by
12 // the Free Software Foundation, either version 3 of the License, or
13 // (at your option) any later version.
14 //
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 // GNU General Public License for more details.
19 //
20 // You should have received a copy of the GNU General Public License
21 // along with Octave; see the file COPYING.  If not, see
22 // <https://www.gnu.org/licenses/>.
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24 ////////////////////////////////////////////////////////////////////////
25 
26 #if ! defined (octave_octave_preserve_stream_state_h)
27 #define octave_octave_preserve_stream_state_h 1
28 
29 #include "octave-config.h"
30 
31 #include <ios>
32 
33 namespace octave
34 {
35   class
36   preserve_stream_state
37   {
38   public:
39 
preserve_stream_state(std::ios & s)40     preserve_stream_state (std::ios& s)
41       : m_stream (s), m_oflags (s.flags ()), m_oprecision (s.precision ()),
42         m_owidth (s.width ()), m_ofill (s.fill ())
43     { }
44 
~preserve_stream_state(void)45     ~preserve_stream_state (void)
46     {
47       m_stream.flags (m_oflags);
48       m_stream.precision (m_oprecision);
49       m_stream.width (m_owidth);
50       m_stream.fill (m_ofill);
51     }
52 
53   private:
54 
55     std::ios& m_stream;
56     std::ios::fmtflags m_oflags;
57     std::streamsize m_oprecision;
58     int m_owidth;
59     char m_ofill;
60   };
61 }
62 
63 #endif
64