mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
|
/* @(#)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[] = "$NetBSD: w_log10.c,v 1.6 1995/05/10 20:49:35 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
|
||
|
|
}
|
||
|
|
weak_alias (__log10, log10)
|