1224110Sjchandra/* @(#)w_log10.c 5.1 93/09/24 */ 2227783Sjchandra/* 3224110Sjchandra * ==================================================== 4224110Sjchandra * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5224110Sjchandra * 6224110Sjchandra * Developed at SunPro, a Sun Microsystems, Inc. business. 7224110Sjchandra * Permission to use, copy, modify, and distribute this 8224110Sjchandra * software is freely granted, provided that this notice 9225394Sjchandra * is preserved. 10225394Sjchandra * ==================================================== 11224110Sjchandra */ 12225394Sjchandra 13225394Sjchandra#include <sys/cdefs.h> 14225394Sjchandra#if defined(LIBM_SCCS) && !defined(lint) 15225394Sjchandra__RCSID("$NetBSD: w_log10.c,v 1.10 2024/07/16 14:52:50 riastradh Exp $"); 16225394Sjchandra#endif 17233541Sjchandra 18233541Sjchandra/* 19233541Sjchandra * wrapper log10(X) 20233541Sjchandra */ 21233541Sjchandra 22233541Sjchandra#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