1  /* Test for correct rounding of negative floating-point numbers by scanf
       2     (bug 23280).
       3     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       4     This file is part of the GNU C Library.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public
       8     License as published by the Free Software Foundation; either
       9     version 2.1 of the License, or (at your option) any later version.
      10  
      11     The GNU C 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 GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library; if not, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #include <fenv.h>
      21  #include <stdio.h>
      22  #include <stdlib.h>
      23  #include <support/check.h>
      24  
      25  static int
      26  do_test (void)
      27  {
      28  #ifdef FE_DOWNWARD
      29    if (fesetround (FE_DOWNWARD) == 0)
      30      {
      31        double a = strtod ("-0.1", NULL);
      32        double b = 0;
      33        int r = sscanf ("-0.1", "%lf", &b);
      34        TEST_VERIFY (r == 1);
      35        TEST_VERIFY (a == b);
      36      }
      37  #endif
      38  #ifdef FE_UPWARD
      39    if (fesetround (FE_UPWARD) == 0)
      40      {
      41        double a = strtod ("-0.1", NULL);
      42        double b = 0;
      43        int r = sscanf ("-0.1", "%lf", &b);
      44        TEST_VERIFY (r == 1);
      45        TEST_VERIFY (a == b);
      46      }
      47  #endif
      48    return 0;
      49  }
      50  
      51  #include <support/test-driver.c>