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// Copyright (C) 2003, 2005 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 <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;
}