libstdc++-v3/testsuite/27_io/objects/char/12048-4.cc

   1 // Copyright (C) 2003, 2009 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 // { dg-require-fileio "" }
  19
  20 #include <iostream>
  21 #include <cstdio>
  22 #include <testsuite_hooks.h>
  23
  24 void
  25 test01()
  26 {
  27   VERIFY( std::freopen("cin_unget-1.txt", "r", stdin) );
  28
  29   char buf[2];
  30   VERIFY( std::cin.rdbuf()->sgetn(buf, 2) == 2 );
  31   int c1 = std::cin.rdbuf()->sungetc();
  32   int c2 = std::fgetc(stdin);
  33   VERIFY( c1 == std::char_traits<char>::to_int_type(buf[1]) );
  34   VERIFY( c2 == c1 );
  35 }
  36
  37 int main(void)
  38 {
  39   test01();
  40   return 0;
  41 }