old-autovect-branch/libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/12.cc

   1 // Copyright (C) 2004 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // 27.6.1.2.2 arithmetic extractors
  20
  21 // XXX This test fails on sparc-solaris2 because of a bug in libc
  22 // XXX sscanf for very long input.  See:
  23 // XXX http://gcc.gnu.org/ml/gcc/2002-12/msg01422.html
  24 // { dg-do run { xfail sparc*-*-solaris2* } }
  25
  26 #include <istream>
  27 #include <sstream>
  28 #include <testsuite_hooks.h>
  29
  30 // libstdc++/3720
  31 // excess input should not cause a core dump
  32 template<typename T>
  33 bool test12_aux(bool integer_type)
  34 {
  35   bool test __attribute__((unused)) = true;
  36
  37   int digits_overflow;
  38   if (integer_type)
  39     // This many digits will overflow integer types in base 10.
  40     digits_overflow = std::numeric_limits<T>::digits10 + 2;
  41   else
  42     // This might do it, unsure.
  43     digits_overflow = std::numeric_limits<T>::max_exponent10 + 1;
  44
  45   std::wstring st;
  46   std::wstring part = L"1234567890123456789012345678901234567890";
  47   for (std::size_t i = 0; i < digits_overflow / part.size() + 1; ++i)
  48     st += part;
  49   std::wstringbuf sb(st);
  50   std::wistream is(&sb);
  51   T t;
  52   is >> t;
  53   VERIFY( is.fail() );
  54   return test;
  55 }
  56
  57 bool test12()
  58 {
  59   bool test __attribute__((unused)) = true;
  60   VERIFY( test12_aux<short>(true) );
  61   VERIFY( test12_aux<int>(true) );
  62   VERIFY( test12_aux<long>(true) );
  63   VERIFY( test12_aux<float>(false) );
  64   VERIFY( test12_aux<double>(false) );
  65   VERIFY( test12_aux<long double>(false) );
  66   return test;
  67 }
  68
  69 int main()
  70 {
  71   test12();
  72   return 0;
  73 }