forked from KolibriOS/kolibrios
6496d04506
This version of menuetlibc was taken from revision 4743, right before I made any changes git-svn-id: svn://kolibrios.org@4973 a494cfbc-eb01-0410-851d-a64ba20cac60
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
|
|
/* @(#)w_log10.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$Id: w_log10.c,v 1.4 1994/08/10 20:35:15 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* wrapper log10(X)
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
|
|
#ifdef __STDC__
|
|
double log10(double x) /* wrapper log10 */
|
|
#else
|
|
double log10(x) /* wrapper log10 */
|
|
double x;
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_log10(x);
|
|
#else
|
|
double z;
|
|
z = __ieee754_log10(x);
|
|
if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
|
|
if(x<=0.0) {
|
|
if(x==0.0)
|
|
return __kernel_standard(x,x,18); /* log10(0) */
|
|
else
|
|
return __kernel_standard(x,x,19); /* log10(x<0) */
|
|
} else
|
|
return z;
|
|
#endif
|
|
}
|