2000-02-18 03:39:52 +08:00
|
|
|
|
|
|
|
/* @(#)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.
|
|
|
|
* ====================================================
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* wrapper double lgamma_r(double x, int *signgamp)
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "fdlibm.h"
|
|
|
|
#include <errno.h>
|
|
|
|
|
|
|
|
#ifndef _DOUBLE_IS_32BITS
|
|
|
|
|
|
|
|
#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)) {
|
2018-12-07 00:14:01 +08:00
|
|
|
if(floor(x)==x&&x<=0.0)
|
|
|
|
/* lgamma(-integer) */
|
|
|
|
errno = EDOM;
|
|
|
|
else
|
|
|
|
/* lgamma(finite) overflow */
|
|
|
|
errno = ERANGE;
|
2020-09-05 00:25:27 +08:00
|
|
|
}
|
|
|
|
return y;
|
2000-02-18 03:39:52 +08:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* defined(_DOUBLE_IS_32BITS) */
|