1// 1999-11-15 Kevin Ediger <kediger@licor.com> 2// test the floating point inserters (facet num_put) 3 4// Copyright (C) 1999-2015 Free Software Foundation, Inc. 5// 6// This file is part of the GNU ISO C++ Library. This library is free 7// software; you can redistribute it and/or modify it under the 8// terms of the GNU General Public License as published by the 9// Free Software Foundation; either version 3, or (at your option) 10// any later version. 11 12// This library is distributed in the hope that it will be useful, 13// but WITHOUT ANY WARRANTY; without even the implied warranty of 14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15// GNU General Public License for more details. 16 17// You should have received a copy of the GNU General Public License along 18// with this library; see the file COPYING3. If not see 19// <http://www.gnu.org/licenses/>. 20 21// { dg-do run { xfail lax_strtofp } } 22 23#include <cmath> // for abs 24#include <cfloat> // for DBL_EPSILON 25#include <sstream> 26#include <limits> 27#include <testsuite_hooks.h> 28 29// libstdc++/9151 30void 31test06() 32{ 33 using namespace std; 34 bool test __attribute__((unused)) = true; 35 36 int prec = numeric_limits<double>::digits10 + 2; 37 double oval = numeric_limits<double>::min(); 38 39 stringstream ostr; 40 ostr.precision(prec); 41 ostr << oval; 42 string sval = ostr.str(); 43 istringstream istr (sval); 44 double ival; 45 istr >> ival; 46 VERIFY( abs(oval-ival)/oval < DBL_EPSILON ); 47} 48 49int 50main() 51{ 52 test06(); 53 return 0; 54} 55