libstdc++-v3/testsuite/27_io/objects/char/12048-3.cc

   1 // Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
   2 // Free Software Foundation, Inc.
   3 //
   4 // This file is part of the GNU ISO C++ Library.  This library is free
   5 // software; you can redistribute it and/or modify it under the
   6 // terms of the GNU General Public License as published by the
   7 // Free Software Foundation; either version 2, or (at your option)
   8 // any later version.
   9
  10 // This library is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License along
  16 // with this library; see the file COPYING.  If not, write to the Free
  17 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  18 // USA.
  19
  20 // { dg-require-fileio "" }
  21
  22 #include <iostream>
  23 #include <cstdio>
  24 #include <testsuite_hooks.h>
  25
  26 void
  27 test01()
  28 {
  29   std::freopen("cin_unget-1.txt", "r", stdin);
  30
  31   char buf[2];
  32   VERIFY( std::cin.rdbuf()->sgetn(buf, 2) == 2 );
  33   int c1 = std::cin.rdbuf()->sungetc();
  34   int c2 = std::cin.rdbuf()->sbumpc();
  35   VERIFY( c1 == std::char_traits<char>::to_int_type(buf[1]) );
  36   VERIFY( c2 == c1 );
  37 }
  38
  39 int main(void)
  40 {
  41   test01();
  42   return 0;
  43 }