1// Copyright (C) 2003-2015 Free Software Foundation, Inc.
2//
3// This file is part of the GNU ISO C++ Library.  This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 3, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING3.  If not see
16// <http://www.gnu.org/licenses/>.
17
18// 27.8.1.4 Overridden virtual functions
19
20#include <fstream>
21
22typedef unsigned char Char;
23
24namespace std
25{
26  template <>
27  class codecvt<Char, char, mbstate_t> :
28    public locale::facet, public codecvt_base
29  {
30  public:
31    typedef Char intern_type;
32    typedef char extern_type;
33    typedef mbstate_t state_type;
34
35    explicit codecvt(size_t refs = 0)
36      : locale::facet(refs) { }
37    result out(mbstate_t& state, const Char* from,
38	       const Char* from_end, const Char*& from_next,
39	       char* to, char* to_limit, char*& to_next) const
40    {
41      return do_out(state, from, from_end, from_next,
42		    to, to_limit, to_next);
43    }
44    result in(mbstate_t& state, const char* from,
45	      const char* from_end, const char*& from_next,
46	      Char* to, Char* to_limit, Char*& to_next) const
47    {
48      return do_in(state, from, from_end, from_next,
49		   to, to_limit, to_next);
50    }
51    result unshift(mbstate_t& state, char* to, char* to_end,
52		   char*& to_next) const
53    { return do_unshift(state, to, to_end, to_next); }
54    int length(mbstate_t& state, const char* from,
55	       const char* from_end, size_t max) const
56    { return do_length(state, from, from_end, max); }
57    int encoding() const throw()
58    { return do_encoding(); }
59    bool always_noconv() const throw()
60    { return do_always_noconv(); }
61    int max_length() const throw()
62    { return do_max_length(); }
63
64    static locale::id id;
65
66  protected:
67    virtual result do_out(mbstate_t&, const Char*,
68			  const Char*,
69			  const Char*&, char*,
70			  char*, char*&) const
71    { return ok; }
72    virtual result do_in(mbstate_t&, const char*,
73			 const char*,
74			 const char*&, Char*,
75			 Char*, Char*&) const
76    { return ok; }
77    virtual result do_unshift(mbstate_t&, char*, char*,
78			      char*&) const
79    { return noconv; }
80    virtual int do_length(mbstate_t&, const char*,
81			  const char*, size_t) const
82    { return 1; }
83    virtual int do_encoding() const throw()
84    { return 1; }
85    virtual bool do_always_noconv() const throw()
86    { return false; }
87    virtual int do_max_length() const throw()
88    { return 1; }
89  };
90
91  locale::id codecvt<Char, char, mbstate_t>::id;
92}
93
94// libstdc++/12206
95void test01()
96{
97  using namespace std;
98  bool test __attribute__((unused)) = true;
99
100  locale loc(locale::classic(),
101	     new codecvt<Char, char, std::mbstate_t>);
102  locale::global(loc);
103
104  basic_filebuf<Char, char_traits<Char> > fb;
105
106  loc = locale::classic();
107  locale::global(loc);
108  fb.pubimbue(loc);
109
110  fb.open("tmp_12206", ios_base::out);
111  try
112    {
113      fb.pubseekoff(0, ios_base::cur);
114    }
115  catch (std::exception&)
116    {
117    }
118  fb.close();
119}
120
121int main()
122{
123  test01();
124  return 0;
125}
126