/* Test of signbit() substitute.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007, 2008 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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
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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include <math.h>
+#include <float.h>
#include <limits.h>
+#include <stdio.h>
#include <stdlib.h>
-#define ASSERT(expr) if (!(expr)) abort ();
+#define ASSERT(expr) \
+ do \
+ { \
+ if (!(expr)) \
+ { \
+ fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+ fflush (stderr); \
+ abort (); \
+ } \
+ } \
+ while (0)
float zerof = 0.0f;
double zerod = 0.0;
long double zerol = 0.0L;
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f.
+ So we use -zerof instead. */
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+ So we use -zerod instead. */
+
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+ So we use minus_zerol instead. */
+long double minus_zerol = -LDBL_MIN * LDBL_MIN;
+
static void
test_signbitf ()
{
ASSERT (signbit (-2.718f));
ASSERT (signbit (-2.718e30f));
ASSERT (signbit (-2.718e-30f));
+ /* Zeros. */
+ ASSERT (!signbit (0.0f));
+ if (1.0f / -zerof < 0)
+ ASSERT (signbit (-zerof));
+ else
+ ASSERT (!signbit (-zerof));
/* Infinite values. */
ASSERT (!signbit (1.0f / 0.0f));
ASSERT (signbit (-1.0f / 0.0f));
ASSERT (signbit (-2.718));
ASSERT (signbit (-2.718e30));
ASSERT (signbit (-2.718e-30));
+ /* Zeros. */
+ ASSERT (!signbit (0.0));
+ if (1.0 / -zerod < 0)
+ ASSERT (signbit (-zerod));
+ else
+ ASSERT (!signbit (-zerod));
/* Infinite values. */
ASSERT (!signbit (1.0 / 0.0));
ASSERT (signbit (-1.0 / 0.0));
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 (1.0L / 0.0L));
ASSERT (signbit (-1.0L / 0.0L));