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/* Test of rounding towards zero.
Copyright (C) 2007-2010 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>
#include "signature.h"
SIGNATURE_CHECK (trunc, double, (double));
#include "isnand-nolibm.h"
#include "nan.h"
#include "macros.h"
/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
So we use -zero instead. */
double zero = 0.0;
int
main ()
{
/* Zero. */
ASSERT (trunc (0.0) == 0.0);
ASSERT (trunc (-zero) == 0.0);
/* Positive numbers. */
ASSERT (trunc (0.3) == 0.0);
ASSERT (trunc (0.7) == 0.0);
ASSERT (trunc (1.0) == 1.0);
ASSERT (trunc (1.5) == 1.0);
ASSERT (trunc (1.999) == 1.0);
ASSERT (trunc (2.0) == 2.0);
ASSERT (trunc (65535.999) == 65535.0);
ASSERT (trunc (65536.0) == 65536.0);
ASSERT (trunc (2.341e31) == 2.341e31);
/* Negative numbers. */
ASSERT (trunc (-0.3) == 0.0);
ASSERT (trunc (-0.7) == 0.0);
ASSERT (trunc (-1.0) == -1.0);
ASSERT (trunc (-1.5) == -1.0);
ASSERT (trunc (-1.999) == -1.0);
ASSERT (trunc (-2.0) == -2.0);
ASSERT (trunc (-65535.999) == -65535.0);
ASSERT (trunc (-65536.0) == -65536.0);
ASSERT (trunc (-2.341e31) == -2.341e31);
/* Infinite numbers. */
ASSERT (trunc (1.0 / 0.0) == 1.0 / 0.0);
ASSERT (trunc (-1.0 / 0.0) == -1.0 / 0.0);
/* NaNs. */
ASSERT (isnand (trunc (NaNd ())));
return 0;
}
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