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/* Test of <math.h> substitute.
Copyright (C) 2007-2011 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include <config.h>
#include <math.h>
#ifndef NAN
# error NAN should be defined
choke me
#endif
#if 0
/* Check that NAN expands into a constant expression. */
static float n = NAN;
#endif
/* Compare two numbers with ==.
This is a separate function because IRIX 6.5 "cc -O" miscompiles an
'x == x' test. */
static int
numeric_equal (double x, double y)
{
return x == y;
}
int
main (void)
{
double d = NAN;
double zero = 0.0;
if (numeric_equal (d, d))
return 1;
d = HUGE_VAL;
if (!numeric_equal (d, 1.0 / zero))
return 1;
return 0;
}
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