glibc/stdio-common/bug26.c

/* Copyright (C) 2013-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <stdio.h>
#include <string.h>

int
main (void)
{
  FILE *f;
  int lost = 0;
  int c;
  double d;
  char s[] = "+.e";

  f = fmemopen (s, strlen (s), "r");
  /* This should fail to parse a floating-point number, and leave 'e' in the
     input.  */
  lost |= (fscanf (f, "%lf", &d) != 0);
  c = fgetc (f);
  lost |= c != 'e';
  puts (lost ? "Test FAILED!" : "Test succeeded.");
  return lost;
}