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/* $OpenBSD: isnan.c,v 1.9 2013/11/12 06:09:48 deraadt Exp $ */ |
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/* |
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* Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <machine/ieee.h> |
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#include <float.h> |
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#include <math.h> |
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int |
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__isnan(double d) |
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{ |
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struct ieee_double *p = (struct ieee_double *)&d; |
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return (p->dbl_exp == DBL_EXP_INFNAN && |
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(p->dbl_frach != 0 || p->dbl_fracl != 0)); |
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} |
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int |
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__isnanf(float f) |
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{ |
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struct ieee_single *p = (struct ieee_single *)&f; |
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return (p->sng_exp == SNG_EXP_INFNAN && p->sng_frac != 0); |
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} |
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#if LDBL_MANT_DIG == DBL_MANT_DIG |
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__strong_alias(__isnanl, __isnan); |
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#endif /* LDBL_MANT_DIG == DBL_MANT_DIG */ |
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/* |
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* 3BSD compatibility aliases. |
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*/ |
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__strong_alias(isnan, __isnan); |
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__strong_alias(isnanf, __isnanf); |