libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/10096.cc

   1 // 2003-05-03  Petur Runolfsson  <peturr02@ru.is>
   2
   3 // Copyright (C) 2003-2024 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 // 27.8.1.4 Overridden virtual functions
  21
  22 // { dg-require-fileio "" }
  23 // { dg-additional-files "filebuf_virtuals-1.txt" }
  24
  25 #include <fstream>
  26 #include <string>
  27 #include <testsuite_hooks.h>
  28
  29 class MyTraits : public std::char_traits<char>
  30 {
  31 };
  32
  33 // libstdc++/10096
  34 void test01()
  35 {
  36   using namespace std;
  37
  38   const char* name = "filebuf_virtuals-1.txt";
  39
  40   string str;
  41   filebuf fb1;
  42   fb1.open(name, ios_base::in);
  43
  44   filebuf::int_type c1;
  45   while ((c1 = fb1.sbumpc()) != filebuf::traits_type::eof())
  46     str.push_back(filebuf::traits_type::to_char_type(c1));
  47   fb1.close();
  48
  49   basic_filebuf<char, MyTraits> fb;
  50   VERIFY( fb.sgetc() == MyTraits::eof() );
  51
  52   fb.open(name, ios_base::in);
  53   VERIFY( fb.is_open() );
  54
  55   for (string::iterator i = str.begin(); i != str.end(); ++i)
  56     {
  57       MyTraits::int_type c2 = fb.sbumpc();
  58       VERIFY( c2 != MyTraits::eof() );
  59       VERIFY( c2 == MyTraits::to_int_type(*i) );
  60     }
  61
  62   VERIFY( fb.sgetc() == MyTraits::eof() );
  63   fb.close();
  64   VERIFY( !fb.is_open() );
  65   VERIFY( fb.sgetc() == MyTraits::eof() );
  66 }
  67
  68 int main()
  69 {
  70   test01();
  71   return 0;
  72 }