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/* Test of signbit() substitute.
Copyright (C) 2007-2024 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 <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include <config.h>
#include <math.h>
/* signbit must be a macro. */
#ifndef signbit
# error missing declaration
#endif
#include <float.h>
#include <limits.h>
#include "minus-zero.h"
#include "infinity.h"
#include "signed-nan.h"
#include "signed-snan.h"
#include "macros.h"
float zerof = 0.0f;
double zerod = 0.0;
long double zerol = 0.0L;
static void
test_signbitf ()
{
/* Finite values. */
ASSERT (!signbit (3.141f));
ASSERT (!signbit (3.141e30f));
ASSERT (!signbit (3.141e-30f));
ASSERT (signbit (-2.718f));
ASSERT (signbit (-2.718e30f));
ASSERT (signbit (-2.718e-30f));
/* Zeros. */
ASSERT (!signbit (0.0f));
if (1.0f / minus_zerof < 0)
ASSERT (signbit (minus_zerof));
else
ASSERT (!signbit (minus_zerof));
/* Infinite values. */
ASSERT (!signbit (Infinityf ()));
ASSERT (signbit (- Infinityf ()));
/* Quiet NaN. */
ASSERT (!signbit (positive_NaNf ()));
ASSERT (signbit (negative_NaNf ()));
#if HAVE_SNANF
/* Signalling NaN. */
ASSERT (!signbit (positive_SNaNf ()));
ASSERT (signbit (negative_SNaNf ()));
#endif
}
static void
test_signbitd ()
{
/* Finite values. */
ASSERT (!signbit (3.141));
ASSERT (!signbit (3.141e30));
ASSERT (!signbit (3.141e-30));
ASSERT (signbit (-2.718));
ASSERT (signbit (-2.718e30));
ASSERT (signbit (-2.718e-30));
/* Zeros. */
ASSERT (!signbit (0.0));
if (1.0 / minus_zerod < 0)
ASSERT (signbit (minus_zerod));
else
ASSERT (!signbit (minus_zerod));
/* Infinite values. */
ASSERT (!signbit (Infinityd ()));
ASSERT (signbit (- Infinityd ()));
/* Quiet NaN. */
ASSERT (!signbit (positive_NaNd ()));
ASSERT (signbit (negative_NaNd ()));
#if HAVE_SNAND
/* Signalling NaN. */
ASSERT (!signbit (positive_SNaNd ()));
ASSERT (signbit (negative_SNaNd ()));
#endif
}
static void
test_signbitl ()
{
/* Finite values. */
ASSERT (!signbit (3.141L));
ASSERT (!signbit (3.141e30L));
ASSERT (!signbit (3.141e-30L));
ASSERT (signbit (-2.718L));
ASSERT (signbit (-2.718e30L));
ASSERT (signbit (-2.718e-30L));
/* Zeros. */
ASSERT (!signbit (0.0L));
if (1.0L / minus_zerol < 0)
ASSERT (signbit (minus_zerol));
else
ASSERT (!signbit (minus_zerol));
/* Infinite values. */
ASSERT (!signbit (Infinityl ()));
ASSERT (signbit (- Infinityl ()));
/* Quiet NaN. */
ASSERT (!signbit (positive_NaNl ()));
ASSERT (signbit (negative_NaNl ()));
#if HAVE_SNANL
/* Signalling NaN. */
ASSERT (!signbit (positive_SNaNl ()));
ASSERT (signbit (negative_SNaNl ()));
#endif
}
int
main ()
{
test_signbitf ();
test_signbitd ();
test_signbitl ();
return test_exit_status;
}
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