math/test-nan-const.c

   1 /* Test nan functions do not have const attribute.  Bug 23277.
   2    Copyright (C) 2018-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <math.h>
  20 #include <string.h>
  21
  22 static int
  23 do_test (void)
  24 {
  25   char buf[2] = { '2', 0 };
  26   float a = nanf (buf);
  27   buf[0] = '3';
  28   float b = nanf (buf);
  29   return memcmp (&a, &b, sizeof (float)) == 0;
  30 }
  31
  32 #include <support/test-driver.c>