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

   1 // 1999-07-01 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 21.3.7.9 inserters and extractors
  22
  23 // NB: This file is predicated on sstreams, istreams, and ostreams
  24 // working, not to mention other major details like char_traits, and
  25 // all of the string class.
  26
  27 #include <string>
  28 #include <fstream>
  29 #include <iostream>
  30 #include <testsuite_hooks.h>
  31
  32 // testing basic_filebuf::xsputn via stress testing with large strings
  33 // based on a bug report libstdc++ 9
  34 // mode == out
  35 void test05(std::size_t size)
  36 {
  37   bool test __attribute__((unused)) = true;
  38   const char filename[] = "inserters_extractors-1.txt";
  39   const char fillc = 'f';
  40   std::ofstream ofs(filename);
  41   std::string str(size, fillc);
  42
  43   // sanity checks
  44   VERIFY( str.size() == size );
  45   VERIFY( ofs.good() );
  46
  47   // stress test
  48   ofs << str << std::endl;
  49   if (!ofs.good())
  50     test = false;
  51
  52   ofs << str << std::endl;
  53   if (!ofs.good())
  54     test = false;
  55
  56   VERIFY( str.size() == size );
  57   VERIFY( ofs.good() );
  58
  59   ofs.close();
  60
  61   // sanity check on the written file
  62   std::ifstream ifs(filename);
  63   std::size_t count = 0;
  64   char c;
  65   while (count <= (2 * size) + 4)
  66     {
  67       ifs >> c;
  68       if (ifs.good() && c == fillc)
  69         {
  70           ++count;
  71           c = '0';
  72         }
  73       else
  74         break;
  75     }
  76
  77   VERIFY( count == 2 * size );
  78 }
  79
  80 int main()
  81 {
  82   test05(1);
  83   test05(1000);
  84   test05(10000);
  85   return 0;
  86 }