/* Test of signbit() substitute.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2011 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>
+/* signbit must be a macro. */
+#ifndef signbit
+# error missing declaration
+#endif
+
+#include <float.h>
#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#define ASSERT(expr) \
- do \
- { \
- if (!(expr)) \
- { \
- fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
- abort (); \
- } \
- } \
- while (0)
+#include "minus-zero.h"
+#include "infinity.h"
+#include "macros.h"
float zerof = 0.0f;
double zerod = 0.0;
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 (1.0f / 0.0f));
- ASSERT (signbit (-1.0f / 0.0f));
+ ASSERT (!signbit (Infinityf ()));
+ ASSERT (signbit (- Infinityf ()));
/* Quiet NaN. */
(void) signbit (zerof / zerof);
#if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
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 (1.0 / 0.0));
- ASSERT (signbit (-1.0 / 0.0));
+ ASSERT (!signbit (Infinityd ()));
+ ASSERT (signbit (- Infinityd ()));
/* Quiet NaN. */
(void) signbit (zerod / zerod);
#if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
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));
+ ASSERT (!signbit (Infinityl ()));
+ ASSERT (signbit (- Infinityl ()));
/* Quiet NaN. */
(void) signbit (zerol / zerol);
#if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT