libstdc++-v3/testsuite/27_io/basic_ostream/inserters_arithmetic/wchar_t/4402.cc

   1 // Copyright (C) 2005, 2006, 2007, 2009 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 3, 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 COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 #include <cstdio> // for swprintf
  19 #include <iostream>
  20 #include <iomanip>
  21 #include <sstream>
  22 #include <limits>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test02()
  27 {
  28   using namespace std;
  29   bool test __attribute__((unused)) = true;
  30
  31   // make sure we can output a very long float
  32   long double val = numeric_limits<long double>::max();
  33   int prec = numeric_limits<long double>::digits10;
  34
  35   wostringstream os;
  36   os.precision(prec);
  37   os.setf(wios::scientific);
  38   os << val;
  39
  40   wchar_t largebuf[512];
  41   swprintf(largebuf, 512, L"%.*Le", prec, val);
  42 #ifdef TEST_NUMPUT_VERBOSE
  43   cout << "expect: " << largebuf << endl;
  44   cout << "result: " << os.str() << endl;
  45 #endif
  46   VERIFY( os && os.str() == largebuf );
  47
  48   // Make sure we can output a long float in fixed format
  49   // without seg-faulting (libstdc++/4402)
  50   double val2 = numeric_limits<double>::max();
  51
  52   wostringstream os2;
  53   os2.precision(3);
  54   os2.setf(wios::fixed);
  55   os2 << val2;
  56
  57   swprintf(largebuf, 512, L"%.*f", 3, val2);
  58 #ifdef TEST_NUMPUT_VERBOSE
  59   cout << "expect: " << largebuf << endl;
  60   cout << "result: " << os2.str() << endl;
  61 #endif
  62   VERIFY( os2 && os2.str() == largebuf );
  63 }
  64
  65 int
  66 main()
  67 {
  68   test02();
  69   return 0;
  70 }