gomp-20050608-branch/libstdc++-v3/testsuite/27_io/basic_ostream/seekp/wchar_t/2346-fstream.cc

   1 // Copyright (C) 2005 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // 27.6.2.4  basic_ostream seek members  [lib.ostream.seeks]
  20 // @require@ %-*.tst %-*.txt
  21 // @diff@ %-*.tst %-*.txt
  22
  23 #include <ostream>
  24 #include <istream>
  25 #include <fstream>
  26 #include <testsuite_hooks.h>
  27
  28 const wchar_t* s = L" lootpack, peanut butter wolf, rob swift, madlib, quasimoto";
  29 const int times = 10;
  30
  31 void write_rewind(std::wiostream& stream)
  32 {
  33   bool test __attribute__((unused)) = true;
  34
  35   for (int j = 0; j < times; j++)
  36     {
  37       std::streampos begin = stream.tellp();
  38
  39       for (int i = 0; i < times; ++i)
  40         stream << j << L'-' << i << s << L'\n';
  41
  42       stream.seekp(begin);
  43     }
  44   VERIFY( stream.good() );
  45 }
  46
  47 void check_contents(std::wiostream& stream)
  48 {
  49   bool test __attribute__((unused)) = true;
  50
  51   stream.clear();
  52   stream.seekg(0, std::wios::beg);
  53   int i = 0;
  54   int loop = times * times + 2;
  55   while (i < loop)
  56     {
  57       stream.ignore(80, L'\n');
  58       if (stream.good())
  59         ++i;
  60       else
  61         break;
  62     }
  63   VERIFY( i == times );
  64 }
  65
  66 // fstream
  67 // libstdc++/2346
  68 void test02()
  69 {
  70   std::wfstream ofstrm;
  71   ofstrm.open("wistream_seeks-3.txt", std::wios::out);
  72   if (!ofstrm)
  73     std::abort();
  74   write_rewind(ofstrm);
  75   ofstrm.close();
  76
  77   std::wfstream ifstrm;
  78   ifstrm.open("wistream_seeks-3.txt", std::wios::in);
  79   check_contents(ifstrm);
  80   ifstrm.close();
  81 }
  82
  83 int main()
  84 {
  85   test02();
  86   return 0;
  87 }