glibc/math/test-nan-const.c

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/* Test nan functions do not have const attribute. Bug 23277.
Copyright (C) 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 <math.h>
#include <string.h>
static int
do_test (void)
{
char buf[2] = { '2', 0 };
float a = nanf (buf);
buf[0] = '3';
float b = nanf (buf);
return memcmp (&a, &b, sizeof (float)) == 0;
}
#include <support/test-driver.c>