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[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 27_io / basic_istream / extractors_arithmetic / char / 12.cc

// 1999-04-12 bkoz

// Copyright (C) 1999-2023 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 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/>.

// 27.6.1.2.2 arithmetic extractors

// { dg-do run { xfail { lax_strtofp } } }

#include <istream>
#include <sstream>
#include <limits>
#include <testsuite_hooks.h>

// libstdc++/3720
// excess input should not cause a core dump
template<typename T>
void test12_aux(bool integer_type)
{
  int digits_overflow;
  if (integer_type)
    // This many digits will overflow integer types in base 10.
    digits_overflow = std::numeric_limits<T>::digits10 + 2;
  else
    // This might do it, unsure.
    digits_overflow = std::numeric_limits<T>::max_exponent10 + 1;
  
  std::string st;
  std::string part = "1234567890123456789012345678901234567890";
  for (std::size_t i = 0; i < digits_overflow / part.size() + 1; ++i)
    st += part;
  std::stringbuf sb(st);
  std::istream is(&sb);
  T t;
  is >> t;
  VERIFY(is.fail());
}

void test12()
{
  test12_aux<short>(true);
  test12_aux<int>(true);
  test12_aux<long>(true);
  test12_aux<float>(false);
  test12_aux<double>(false);
  test12_aux<long double>(false);
}

int main()
{
  test12();
  return 0;
}