glibc/sysdeps/generic/w_lgamma_r.c
Jakub Jelinek 0ecb606cb6 2.5-18.1
2007-07-12 18:26:36 +00:00

52 lines
1.4 KiB
C

/* @(#)wr_lgamma.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_lgamma_r.c,v 1.6 1995/05/10 20:49:27 jtc Exp $";
#endif
/*
* wrapper double lgamma_r(double x, int *signgamp)
*/
#include "math.h"
#include "math_private.h"
#ifdef __STDC__
double __lgamma_r(double x, int *signgamp) /* wrapper lgamma_r */
#else
double __lgamma_r(x,signgamp) /* wrapper lgamma_r */
double x; int *signgamp;
#endif
{
#ifdef _IEEE_LIBM
return __ieee754_lgamma_r(x,signgamp);
#else
double y;
y = __ieee754_lgamma_r(x,signgamp);
if(_LIB_VERSION == _IEEE_) return y;
if(!__finite(y)&&__finite(x)) {
if(__floor(x)==x&&x<=0.0)
return __kernel_standard(x,x,15); /* lgamma pole */
else
return __kernel_standard(x,x,14); /* lgamma overflow */
} else
return y;
#endif
}
weak_alias (__lgamma_r, lgamma_r)
#ifdef NO_LONG_DOUBLE
strong_alias (__lgamma_r, __lgammal_r)
weak_alias (__lgamma_r, lgammal_r)
#endif