libstdc++-v3/testsuite/27_io/basic_filebuf/overflow/char/13858.cc

   1 // 2004-02-14  Petur Runolfsson  <peturr02@ru.is>
   2
   3 // Copyright (C) 2004-2024 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 #include <fstream>
  23 #include <locale>
  24
  25 class Cvt : public std::codecvt<char, char, std::mbstate_t>
  26 {
  27 protected:
  28   virtual std::codecvt_base::result
  29   do_out(std::mbstate_t&, const char* from, const char*,
  30          const char*& from_next, char* to, char*, char*& to_next) const
  31   {
  32     from_next = from;
  33     to_next = to;
  34     return std::codecvt_base::error;
  35   }
  36
  37   virtual bool
  38   do_always_noconv() const throw()
  39   { return false; }
  40 };
  41
  42 // libstdc++/13858
  43 void test01()
  44 {
  45   using namespace std;
  46
  47   filebuf fb;
  48   fb.pubimbue(locale(locale::classic(), new Cvt));
  49   fb.open("tmp_13858_char", ios_base::out);
  50
  51   try
  52     {
  53       fb.sputc('a');
  54       fb.sputc('b');
  55       fb.pubimbue(locale::classic());
  56       fb.sputc('c');
  57       fb.pubsync();
  58       fb.close();
  59     }
  60   catch (std::exception&)
  61     {
  62     }
  63 }
  64
  65 int main()
  66 {
  67   test01();
  68   return 0;
  69 }