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// Copyright (C) 2005, 2006, 2007, 2009 Free Software Foundation

//

// 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/>.

// { dg-require-fileio "" }

// 27.6.2.4  basic_ostream seek members  [lib.ostream.seeks]

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

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

#include <ostream>

#include <istream>

#include <fstream>

#include <cstdlib>

#include <testsuite_hooks.h>

const wchar_t* s = L" lootpack, peanut butter wolf, rob swift, madlib, quasimoto";

const int times = 10;

void write_rewind(std::wiostream& stream)

{

  bool test __attribute__((unused)) = true;

  for (int j = 0; j < times; j++)

    {

      std::streampos begin = stream.tellp();

      for (int i = 0; i < times; ++i)

        stream << j << L'-' << i << s << L'\n';

      stream.seekp(begin);

    }

  VERIFY( stream.good() );

}

void check_contents(std::wiostream& stream)

{

  bool test __attribute__((unused)) = true;

  stream.clear();

  stream.seekg(0, std::wios::beg);

  int i = 0;

  int loop = times * times + 2;

  while (i < loop)

    {

      stream.ignore(80, L'\n');

      if (stream.good())

        ++i;

      else

        break;

    }

  VERIFY( i == times );

}

// fstream

// libstdc++/2346

void test02()

{

  std::wfstream ofstrm;

  ofstrm.open("wistream_seeks-3.txt", std::wios::out);

  if (!ofstrm)

    std::abort();

  write_rewind(ofstrm);

  ofstrm.close();

  std::wfstream ifstrm;

  ifstrm.open("wistream_seeks-3.txt", std::wios::in);

  check_contents(ifstrm);

  ifstrm.close();

}

int main()

{

  test02();

  return 0;

}