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#include <cstdio> // for sprintf 22#include <iostream> 23#include <iomanip> 24#include <sstream> 25#include <limits> 26#include <testsuite_hooks.h> 27 28void 29test02() 30{ 31 using namespace std; 32 bool test __attribute__((unused)) = true; 33 34 // make sure we can output a very long float 35 long double val = numeric_limits<long double>::max(); 36 int prec = numeric_limits<long double>::digits10; 37 38 ostringstream os; 39 os.precision(prec); 40 os.setf(ios::scientific); 41 os << val; 42 43 char largebuf[512]; 44 sprintf(largebuf, "%.*Le", prec, val); 45#ifdef TEST_NUMPUT_VERBOSE 46 cout << "expect: " << largebuf << endl; 47 cout << "result: " << os.str() << endl; 48#endif 49 VERIFY( os && os.str() == largebuf ); 50 51 // Make sure we can output a long float in fixed format 52 // without seg-faulting (libstdc++/4402) 53 double val2 = numeric_limits<double>::max(); 54 55 ostringstream os2; 56 os2.precision(3); 57 os2.setf(ios::fixed); 58 os2 << val2; 59 60 sprintf(largebuf, "%.*f", 3, val2); 61#ifdef TEST_NUMPUT_VERBOSE 62 cout << "expect: " << largebuf << endl; 63 cout << "result: " << os2.str() << endl; 64#endif 65 VERIFY( os2 && os2.str() == largebuf ); 66} 67 68int 69main() 70{ 71 test02(); 72 return 0; 73} 74