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// Copyright (C) 2004, 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/>.

// 27.6.1.3 unformatted input functions

#include <cwchar> // for wcslen

#include <istream>

#include <sstream>

#include <testsuite_hooks.h>

// [patch] bits/istream.tcc - getline(char_type*,streamsize,char_type)

// http://gcc.gnu.org/ml/libstdc++/2000-07/msg00003.html

void

test05()

{

  const wchar_t* charray = L"\n"

L"a\n"

L"aa\n"

L"aaa\n"

L"aaaa\n"

L"aaaaa\n"

L"aaaaaa\n"

L"aaaaaaa\n"

L"aaaaaaaa\n"

L"aaaaaaaaa\n"

L"aaaaaaaaaa\n"

L"aaaaaaaaaaa\n"

L"aaaaaaaaaaaa\n"

L"aaaaaaaaaaaaa\n"

L"aaaaaaaaaaaaaa\n";

  bool test __attribute__((unused)) = true;

  const std::streamsize it = 5;

  std::streamsize br = 0;

  wchar_t tmp[it];

  std::wstringbuf sb(charray, std::ios_base::in);

  std::wistream ifs(&sb);

  std::streamsize blen = std::wcslen(charray);

  VERIFY(!(!ifs));

  while(ifs.getline(tmp, it) || ifs.gcount())

    {

      br += ifs.gcount();

      if(ifs.eof())

        {

          // Just sanity checks to make sure we've extracted the same

          // number of chars that were in the streambuf

          VERIFY( br == blen );

          // Also, we should only set the failbit if we could

          // _extract_ no chars from the stream, i.e. the first read

          // returned EOF. 

          VERIFY( ifs.fail() && ifs.gcount() == 0 );

        }

      else if(ifs.fail())

        {

          // delimiter not read

          //

          // either

          // -> extracted no characters

          // or

          // -> n - 1 characters are stored

          ifs.clear(ifs.rdstate() & ~std::ios::failbit);

          VERIFY( (ifs.gcount() == 0) || (std::wcslen(tmp) == it - 1) );

          VERIFY( !(!ifs) );

          continue;

        }

      else

        {

          // delimiter was read.

          //

          // -> wcslen(__s) < n - 1 

          // -> delimiter was seen -> gcount() > wcslen(__s)

          VERIFY( ifs.gcount() == static_cast<std::streamsize>(std::wcslen(tmp)

                                                               + 1) );

          continue;

        }

    }

}

int

main()

{

  test05();

  return 0;

}