1// { dg-require-swprintf "" } 2 3// Copyright (C) 2005-2015 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 3, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING3. If not see 18// <http://www.gnu.org/licenses/>. 19 20#include <cstdio> // for swprintf 21#include <iostream> 22#include <iomanip> 23#include <sstream> 24#include <limits> 25#include <testsuite_hooks.h> 26 27void 28test02() 29{ 30 using namespace std; 31 bool test __attribute__((unused)) = true; 32 33 // make sure we can output a very long float 34 long double val = numeric_limits<long double>::max(); 35 int prec = numeric_limits<long double>::digits10; 36 37 wostringstream os; 38 os.precision(prec); 39 os.setf(wios::scientific); 40 os << val; 41 42 wchar_t largebuf[512]; 43 swprintf(largebuf, 512, L"%.*Le", prec, val); 44#ifdef TEST_NUMPUT_VERBOSE 45 wcout << "expect: " << largebuf << endl; 46 wcout << "result: " << os.str() << endl; 47#endif 48 VERIFY( os && os.str() == largebuf ); 49 50 // Make sure we can output a long float in fixed format 51 // without seg-faulting (libstdc++/4402) 52 double val2 = numeric_limits<double>::max(); 53 54 wostringstream os2; 55 os2.precision(3); 56 os2.setf(wios::fixed); 57 os2 << val2; 58 59 swprintf(largebuf, 512, L"%.*f", 3, val2); 60#ifdef TEST_NUMPUT_VERBOSE 61 wcout << "expect: " << largebuf << endl; 62 wcout << "result: " << os2.str() << endl; 63#endif 64 VERIFY( os2 && os2.str() == largebuf ); 65} 66 67int 68main() 69{ 70 test02(); 71 return 0; 72} 73