libstdc++-v3/testsuite/ext/stdio_sync_filebuf/char/12048-1.cc

   1 // 2003-05-01 Petur Runolfsson <peturr02@ru.is>
   2
   3 // Copyright (C) 2003-2019 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 // { dg-require-fileio "" }
  21
  22 #include <ext/stdio_sync_filebuf.h>
  23 #include <testsuite_hooks.h>
  24
  25 // libstdc++/12048
  26 void test02()
  27 {
  28   const char* name = "cin_unget-1.txt";
  29
  30   std::FILE* file = std::fopen(name, "r");
  31   __gnu_cxx::stdio_sync_filebuf<char> sbuf(file);
  32   int c1 = sbuf.sbumpc();
  33   VERIFY( c1 != EOF );
  34   int c2 = sbuf.sungetc();
  35   VERIFY( c2 != EOF );
  36   int c3 = sbuf.sbumpc();
  37   VERIFY( c3 == c1 );
  38
  39   std::fclose(file);
  40 }
  41
  42 int main ()
  43 {
  44   test02();
  45   return 0;
  46 }