1/* @(#)w_log10.c 5.1 93/09/24 */ 2/* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13#include <sys/cdefs.h> 14#if defined(LIBM_SCCS) && !defined(lint) 15__RCSID("$NetBSD: w_log10.c,v 1.10 2024/07/16 14:52:50 riastradh Exp $"); 16#endif 17 18/* 19 * wrapper log10(X) 20 */ 21 22#include "namespace.h" 23 24#include "math.h" 25#include "math_private.h" 26 27#ifndef __HAVE_LONG_DOUBLE 28__weak_alias(log10l, _log10l) 29__strong_alias(_log10l, _log10) 30#endif 31 32__weak_alias(log10, _log10) 33double 34log10(double x) /* wrapper log10 */ 35{ 36#ifdef _IEEE_LIBM 37 return __ieee754_log10(x); 38#else 39 double z; 40 z = __ieee754_log10(x); 41 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; 42 if(x<=0.0) { 43 if(x==0.0) 44 return __kernel_standard(x,x,18); /* log10(0) */ 45 else 46 return __kernel_standard(x,x,19); /* log10(x<0) */ 47 } else 48 return z; 49#endif 50} 51