libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/char/3.cc

   1 // Copyright (C) 2007-2013 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 // 27.8.1.4 Overridden virtual functions
  19
  20 // { dg-require-fileio "" }
  21
  22 #include <fstream>
  23 #include <cctype>
  24 #include <locale>
  25 #include <testsuite_hooks.h>
  26
  27 class Mycvtcc
  28 : public std::codecvt<char, char, std::mbstate_t>
  29 {
  30 protected:
  31   virtual result
  32   do_in(state_type&,
  33         const extern_type* from, const extern_type* from_end,
  34         const extern_type*& from_next,
  35         intern_type* to, intern_type* to_limit,
  36         intern_type*& to_next) const
  37   {
  38     from_next = from, to_next = to;
  39
  40     if (from_next == from_end || to_next == to_limit)
  41       return partial;
  42
  43     if (std::islower(*from_next))
  44       *to_next = std::toupper(*from_next);
  45     else
  46       *to_next = *from_next;
  47     ++from_next, ++to_next;
  48     return ok;
  49   }
  50
  51   virtual bool
  52   do_always_noconv() const throw()
  53   { return false; }
  54 };
  55
  56 // See Novell Bug 255122
  57 void test01()
  58 {
  59   bool test __attribute__((unused)) = true;
  60   using namespace std;
  61
  62   const char* name = "tmp_underflow_3.tst";
  63   filebuf fbuf, fbufx;
  64
  65   fbuf.open(name, ios_base::out | ios_base::trunc);
  66   VERIFY( fbuf.sputc('a') == 'a' );
  67   VERIFY( fbuf.sputc('b') == 'b' );
  68   VERIFY( fbuf.sputc('\n') == '\n' );
  69   fbuf.close();
  70
  71   fbufx.pubimbue(locale(locale::classic(), new Mycvtcc));
  72   fbufx.open(name, ios_base::in);
  73   VERIFY( fbufx.sbumpc() == 'A' );
  74   VERIFY( fbufx.sbumpc() == 'B' );
  75   VERIFY( fbufx.sbumpc() == '\n' );
  76   VERIFY( fbufx.sbumpc() == filebuf::traits_type::eof() );
  77   fbufx.close();
  78 }
  79
  80 int main()
  81 {
  82   test01();
  83   return 0;
  84 }