libstdc++-v3/testsuite/27_io/basic_filebuf/overflow/char/9182-2.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2023 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
  24 #include <fstream>
  25 #include <locale>
  26 #include <testsuite_hooks.h>
  27
  28 const char name_07[] = "filebuf_virtuals-7.txt"; // empty file, need to create
  29
  30 class errorcvt : public std::codecvt<char, char, mbstate_t>
  31 {
  32 protected:
  33   std::codecvt_base::result
  34   do_out(mbstate_t&, const char* from, const char*,
  35          const char*& from_next, char* to, char*,
  36          char*& to_next) const
  37   {
  38     from_next = from;
  39     to_next = to;
  40     return std::codecvt<char, char, mbstate_t>::error;
  41   }
  42
  43   virtual bool do_always_noconv() const throw()
  44   {
  45     return false;
  46   }
  47 };
  48
  49 // libstdc++/9182
  50 // basic_filebuf<>::sync and overflow do not write out any characters
  51 // if codecvt<>::out returns error
  52 void test14()
  53 {
  54   using namespace std;
  55
  56   locale loc =  locale::classic();
  57   loc = locale(loc, new errorcvt);
  58
  59   filebuf fbuf1;
  60   fbuf1.pubimbue(loc);
  61   fbuf1.pubsetbuf(0, 0);
  62   fbuf1.open(name_07, ios_base::out | ios_base::trunc);
  63
  64   try
  65     {
  66       fbuf1.sputn("onne", 4);
  67       fbuf1.close();
  68       VERIFY( false );
  69     }
  70   catch (std::exception&)
  71     {
  72     }
  73 }
  74
  75 int main()
  76 {
  77   test14();
  78   return 0;
  79 }