1  /* Copyright (C) 2013-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C 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 GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stdio.h>
      19  #include <string.h>
      20  
      21  int
      22  main (void)
      23  {
      24    FILE *f;
      25    int lost = 0;
      26    int c;
      27    double d;
      28    char s[] = "+.e";
      29  
      30    f = fmemopen (s, strlen (s), "r");
      31    /* This should fail to parse a floating-point number, and leave 'e' in the
      32       input.  */
      33    lost |= (fscanf (f, "%lf", &d) != 0);
      34    c = fgetc (f);
      35    lost |= c != 'e';
      36    puts (lost ? "Test FAILED!" : "Test succeeded.");
      37    return lost;
      38  }