libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/wchar_t/5.cc

   1 // 1999-07-01 bkoz
   2
   3 // Copyright (C) 1999-2016 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 // 21.3.7.9 inserters and extractors
  21
  22 // NB: This file is predicated on sstreams, istreams, and ostreams
  23 // working, not to mention other major details like char_traits, and
  24 // all of the string class.
  25
  26 #include <string>
  27 #include <fstream>
  28 #include <iostream>
  29 #include <testsuite_hooks.h>
  30
  31 // testing basic_filebuf::xsputn via stress testing with large strings
  32 // based on a bug report libstdc++ 9
  33 // mode == out
  34 void test05(std::size_t size)
  35 {
  36   bool test __attribute__((unused)) = true;
  37   const char filename[] = "inserters_extractors-1.txt";
  38   const wchar_t fillc = L'f';
  39   std::wofstream ofs(filename);
  40   std::wstring str(size, fillc);
  41
  42   // sanity checks
  43   VERIFY( str.size() == size );
  44   VERIFY( ofs.good() );
  45
  46   // stress test
  47   ofs << str << std::endl;
  48   if (!ofs.good())
  49     test = false;
  50
  51   ofs << str << std::endl;
  52   if (!ofs.good())
  53     test = false;
  54
  55   VERIFY( str.size() == size );
  56   VERIFY( ofs.good() );
  57
  58   ofs.close();
  59
  60   // sanity check on the written file
  61   std::wifstream ifs(filename);
  62   std::size_t count = 0;
  63   wchar_t c;
  64   while (count <= (2 * size) + 4)
  65     {
  66       ifs >> c;
  67       if (ifs.good() && c == fillc)
  68         {
  69           ++count;
  70           c = '0';
  71         }
  72       else
  73         break;
  74     }
  75
  76   VERIFY( count == 2 * size );
  77 }
  78
  79 int main()
  80 {
  81   test05(1);
  82   test05(1000);
  83   test05(10000);
  84   return 0;
  85 }