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/* $NetBSD: isinf.c,v 1.1 1995/02/10 17:50:23 cgd Exp $ */
/* $FreeBSD$ */
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/types.h>
#include <machine/ieee.h>
#include <math.h>
int
isnan(d)
double d;
{
register struct ieee_double *p = (struct ieee_double *)&d;
return (p->dbl_exp == DBL_EXP_INFNAN &&
(p->dbl_frach || p->dbl_fracl));
}
int
isinf(d)
double d;
{
register struct ieee_double *p = (struct ieee_double *)&d;
return (p->dbl_exp == DBL_EXP_INFNAN &&
!p->dbl_frach && !p->dbl_fracl);
}
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