/* $OpenBSD: isinf.c,v 1.6 2011/07/02 19:27:34 martynas Exp $ */ /* * Copyright (c) 2008 Martynas Venckus * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* LINTLIBRARY */ #include #include #include #include int __isinf(double d) { struct ieee_double *p = (struct ieee_double *)&d; return (p->dbl_exp == DBL_EXP_INFNAN && p->dbl_frach == 0 && p->dbl_fracl == 0); } int __isinff(float f) { struct ieee_single *p = (struct ieee_single *)&f; return (p->sng_exp == SNG_EXP_INFNAN && p->sng_frac == 0); } #if LDBL_MANT_DIG == 53 #ifdef lint /* PROTOLIB1 */ int __isinfl(long double); #else /* lint */ __weak_alias(__isinfl, __isinf); #endif /* lint */ #endif /* LDBL_MANT_DIG == 53 */ /* * 3BSD compatibility aliases. */ __weak_alias(isinf, __isinf); __weak_alias(isinff, __isinff);