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// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>

// Copyright (C) 2001, 2002, 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>

#include <testsuite_hooks.h>

#include <testsuite_io.h>

// @require@ %-*.tst %-*.txt

// @diff@ %-*.tst %*.txt

const char name_01[] = "tmp_sungetc_1out.tst"; // empty file, need to create

// Test overloaded virtual functions.

void test01()

{

  using namespace std;

  using namespace __gnu_test;

  typedef std::filebuf::int_type        int_type;

  typedef filebuf::traits_type          traits_type;

  bool test __attribute__((unused)) = true;

  int_type                      c1, c2;

  // int_type sungetc()

  // if in_cur not avail, return pbackfail(), else decrement and

  // return to_int_type(*gptr())

  // out

  {

    constraint_filebuf fb_01; // out

    fb_01.open(name_01, ios::out | ios::trunc);

    VERIFY( !fb_01.write_position() );

    VERIFY( !fb_01.read_position() );

    c1 = fb_01.sgetc();

    VERIFY( c1 == traits_type::eof() );

    c2 = fb_01.sungetc();

    VERIFY( c2 == traits_type::eof() );

    fb_01.sbumpc();

    c1 = fb_01.sbumpc();

    c2 = fb_01.sungetc();

    VERIFY( c1 == c2 );

    VERIFY( !fb_01.write_position() );

    VERIFY( !fb_01.read_position() );

  }

}

int main()

{

  test01();

  return 0;

}