| // 1999-11-15 Kevin Ediger <kediger@licor.com> |
| // test the floating point inserters (facet num_put) |
| |
| // Copyright (C) 1999-2021 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/>. |
| |
| #include <cstdio> // for sprintf |
| #include <iostream> |
| #include <iomanip> |
| #include <sstream> |
| #include <limits> |
| #include <testsuite_hooks.h> |
| |
| void |
| test02() |
| { |
| using namespace std; |
| |
| // make sure we can output a very long float |
| long double val = numeric_limits<long double>::max(); |
| int prec = numeric_limits<long double>::digits10; |
| |
| ostringstream os; |
| os.precision(prec); |
| os.setf(ios::scientific); |
| os << val; |
| |
| char largebuf[512]; |
| sprintf(largebuf, "%.*Le", prec, val); |
| #ifdef TEST_NUMPUT_VERBOSE |
| cout << "expect: " << largebuf << endl; |
| cout << "result: " << os.str() << endl; |
| #endif |
| VERIFY( os && os.str() == largebuf ); |
| |
| // Make sure we can output a long float in fixed format |
| // without seg-faulting (libstdc++/4402) |
| double val2 = numeric_limits<double>::max(); |
| |
| ostringstream os2; |
| os2.precision(3); |
| os2.setf(ios::fixed); |
| os2 << val2; |
| |
| sprintf(largebuf, "%.*f", 3, val2); |
| #ifdef TEST_NUMPUT_VERBOSE |
| cout << "expect: " << largebuf << endl; |
| cout << "result: " << os2.str() << endl; |
| #endif |
| VERIFY( os2 && os2.str() == largebuf ); |
| } |
| |
| int |
| main() |
| { |
| test02(); |
| return 0; |
| } |