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// Copyright (C) 2004 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 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.

// 27.6.1.3 unformatted input functions

#include <istream>

#include <string>

#include <fstream>

#include <testsuite_hooks.h>

using namespace std;

wstring

prepare(wstring::size_type len, unsigned nchunks, wchar_t delim)

{

  wstring ret;

  for (unsigned i = 0; i < nchunks; ++i)

    {

      for (wstring::size_type j = 0; j < len; ++j)

        ret.push_back(L'a' + rand() % 26);

      len *= 2;

      ret.push_back(delim);

    }

  return ret;

}

void

check(wistream& stream, const wstring& str, unsigned nchunks, wchar_t delim)

{

  bool test __attribute__((unused)) = true;

  static wchar_t buf[1000000];

  wstring::size_type index = 0, index_new = 0;

  unsigned n = 0;

  while (stream.getline(buf, sizeof(buf) / sizeof(wchar_t), delim))

    {

      index_new = str.find(delim, index);

      VERIFY( static_cast<string::size_type>(stream.gcount()) ==

               index_new - index + 1 );

      VERIFY( !str.compare(index, index_new - index, buf) );

      index = index_new + 1;

      ++n;

    }

  VERIFY( stream.gcount() == 0 );

  VERIFY( stream.eof() );

  VERIFY( n == nchunks );

}

void test01()

{

  const char filename[] = "wistream_getline.txt";

  const wchar_t delim = L'|';

  const unsigned nchunks = 10;

  const wstring data = prepare(777, nchunks, delim);

  wofstream ofstrm;

  ofstrm.open(filename);

  ofstrm.write(data.data(), data.size());

  ofstrm.close();

  wifstream ifstrm;

  ifstrm.open(filename);

  check(ifstrm, data, nchunks, delim);

  ifstrm.close();

}

int main()

{

  test01();

  return 0;

}