1 |
|
|
/* $OpenBSD: isfinite.c,v 1.8 2013/07/03 04:46:36 espie Exp $ */ |
2 |
|
|
/* |
3 |
|
|
* Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org> |
4 |
|
|
* |
5 |
|
|
* Permission to use, copy, modify, and distribute this software for any |
6 |
|
|
* purpose with or without fee is hereby granted, provided that the above |
7 |
|
|
* copyright notice and this permission notice appear in all copies. |
8 |
|
|
* |
9 |
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
10 |
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
11 |
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
12 |
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
13 |
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
14 |
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
15 |
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
16 |
|
|
*/ |
17 |
|
|
|
18 |
|
|
#include <sys/types.h> |
19 |
|
|
#include <machine/ieee.h> |
20 |
|
|
#include <float.h> |
21 |
|
|
#include <math.h> |
22 |
|
|
|
23 |
|
|
int |
24 |
|
|
__isfinite(double d) |
25 |
|
|
{ |
26 |
|
|
struct ieee_double *p = (struct ieee_double *)&d; |
27 |
|
|
|
28 |
|
|
return (p->dbl_exp != DBL_EXP_INFNAN); |
29 |
|
|
} |
30 |
|
|
|
31 |
|
|
int |
32 |
|
|
__isfinitef(float f) |
33 |
|
|
{ |
34 |
|
|
struct ieee_single *p = (struct ieee_single *)&f; |
35 |
|
|
|
36 |
|
|
return (p->sng_exp != SNG_EXP_INFNAN); |
37 |
|
|
} |
38 |
|
|
|
39 |
|
|
#if LDBL_MANT_DIG == DBL_MANT_DIG |
40 |
|
|
__strong_alias(__isfinitel, __isfinite); |
41 |
|
|
#endif /* LDBL_MANT_DIG == DBL_MANT_DIG */ |
42 |
|
|
|
43 |
|
|
/* |
44 |
|
|
* 3BSD compatibility aliases. |
45 |
|
|
*/ |
46 |
|
|
__strong_alias(finite, __isfinite); |
47 |
|
|
__strong_alias(finitef, __isfinitef); |