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// Copyright (C) 2003, 2005, 2009 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 3, 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 COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// 27.8.1.4 Overridden virtual functions

// { dg-require-fileio "" }

#include <locale>

#include <fstream>

#include <testsuite_hooks.h>

#include <testsuite_character.h>

// libstdc++/12790

void test01()

{

  using namespace std;

  using __gnu_test::pod_uchar;

  typedef basic_filebuf<pod_uchar>::traits_type traits_type;

  bool test __attribute__((unused)) = true;

  const char* name = "tmp_seekoff_12790";

  locale loc(locale::classic(),

             new codecvt<traits_type::char_type, char,

             traits_type::state_type>);

  basic_filebuf<pod_uchar> fb;

  fb.pubimbue(loc);

  fb.open(name, ios_base::out);

  fb.sputc(pod_uchar::from<char>(0xff));

  fb.sputc(pod_uchar::from<char>(0));

  fb.sputc(pod_uchar::from<char>(0));

  fb.sputc(pod_uchar::from<char>('a'));

  fb.sputc(pod_uchar::from<char>('a'));

  fb.sputc(pod_uchar::from<char>('a'));

  fb.sputc(pod_uchar::from<char>('a'));

  fb.close();

  fb.open(name, ios_base::in);

  fb.sbumpc();

  fb.sbumpc();

  fb.sbumpc();

  // Check that seekoff calls codecvt::length with the correct state.

  traits_type::pos_type pos = fb.pubseekoff(0, ios_base::cur);

  VERIFY( pos != traits_type::pos_type(traits_type::off_type(-1)) );

  traits_type::int_type c = fb.sbumpc();

  VERIFY( c != traits_type::eof() );

  VERIFY( traits_type::eq(traits_type::to_char_type(c),

                          pod_uchar::from<char>('a')) );

  fb.sbumpc();

  fb.sbumpc();

  c = fb.sbumpc();

  VERIFY( c != traits_type::eof() );

  VERIFY( traits_type::eq(traits_type::to_char_type(c),

                          pod_uchar::from<char>('a')) );

  c = fb.sbumpc();

  VERIFY( c == traits_type::eof() );

  fb.close();

}

int main()

{

  test01();

  return 0;

}