libstdc++-v3/testsuite/27_io/basic_filebuf/overflow/char/9169.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2019 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_04[] = "filebuf_virtuals-4.txt"; // empty file, need to create
  29
  30 class Cvt_to_upper : public std::codecvt<char, char, mbstate_t>
  31 {
  32   bool do_always_noconv() const throw()
  33   {
  34     return false;
  35   }
  36 };
  37
  38 // libstdc++/9169
  39 // filebuf output fails if codecvt<>::out returns noconv
  40 void test10()
  41 {
  42   using namespace std;
  43
  44   locale c_loc = locale::classic();
  45   locale loc(c_loc, new Cvt_to_upper);
  46
  47   string str("abcdefghijklmnopqrstuvwxyz");
  48   string tmp;
  49
  50   {
  51     ofstream out;
  52     out.imbue(loc);
  53     out.open(name_04);
  54     copy(str.begin(), str.end(), ostreambuf_iterator<char>(out));
  55   }
  56
  57   {
  58     ifstream in;
  59     in.open(name_04);
  60     copy(istreambuf_iterator<char>(in), istreambuf_iterator<char>(),
  61          back_inserter(tmp));
  62   }
  63
  64   VERIFY( tmp.size() == str.size() );
  65   VERIFY( tmp == str );
  66 }
  67
  68 int main()
  69 {
  70   test10();
  71   return 0;
  72 }