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// Copyright (C) 2003 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 2, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// 27.8.1.4 Overridden virtual functions

#include <fstream>

typedef unsigned char Char;

namespace std

{

  template <>

  class codecvt<Char, char, mbstate_t> :

    public locale::facet, public codecvt_base

  {

  public:

    typedef Char intern_type;

    typedef char extern_type;

    typedef mbstate_t state_type;

    explicit codecvt(size_t refs = 0)

      : locale::facet(refs) { }

    result out(mbstate_t& state, const Char* from,

               const Char* from_end, const Char*& from_next,

               char* to, char* to_limit, char*& to_next) const

    {

      return do_out(state, from, from_end, from_next,

                    to, to_limit, to_next);

    }

    result in(mbstate_t& state, const char* from,

              const char* from_end, const char*& from_next,

              Char* to, Char* to_limit, Char*& to_next) const

    {

      return do_in(state, from, from_end, from_next,

                   to, to_limit, to_next);

    }

    result unshift(mbstate_t& state, char* to, char* to_end,

                   char*& to_next) const

    { return do_unshift(state, to, to_end, to_next); }

    int length(mbstate_t& state, const char* from,

               const char* from_end, size_t max) const

    { return do_length(state, from, from_end, max); }

    int encoding() const throw()

    { return do_encoding(); }

    bool always_noconv() const throw()

    { return do_always_noconv(); }

    int max_length() const throw()

    { return do_max_length(); }

    static locale::id id;

  protected:

    virtual result do_out(mbstate_t&, const Char*,

                          const Char*,

                          const Char*&, char*,

                          char*, char*&) const

    { return ok; }

    virtual result do_in(mbstate_t&, const char*,

                         const char*,

                         const char*&, Char*,

                         Char*, Char*&) const

    { return ok; }

    virtual result do_unshift(mbstate_t&, char*, char*,

                              char*&) const

    { return noconv; }

    virtual int do_length(mbstate_t&, const char*,

                          const char*, size_t) const

    { return 1; }

    virtual int do_encoding() const throw()

    { return 1; }

    virtual bool do_always_noconv() const throw()

    { return false; }

    virtual int do_max_length() const throw()

    { return 1; }

  };

  locale::id codecvt<Char, char, mbstate_t>::id;

}

// libstdc++/12206

void test01()

{

  using namespace std;

  bool test __attribute__((unused)) = true;

  locale loc(locale::classic(),

             new codecvt<Char, char, std::mbstate_t>);

  locale::global(loc);

  basic_filebuf<Char, char_traits<Char> > fb;

  loc = locale::classic();

  locale::global(loc);

  fb.pubimbue(loc);

  fb.open("tmp_12206", ios_base::out);

  try

    {

      fb.pubseekoff(0, ios_base::cur);

    }

  catch (std::exception&)

    {

    }

  fb.close();

}

int main()

{

  test01();

  return 0;

}