38 lines
854 B
C
38 lines
854 B
C
|
|
/* @(#)er_gamma.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.
|
|
* ====================================================
|
|
*
|
|
*/
|
|
|
|
/* gamma_r(x, signgamp)
|
|
* Reentrant version of the logarithm of the Gamma function
|
|
* with user provide pointer for the sign of Gamma(x).
|
|
*
|
|
* Method: See lgamma_r
|
|
*/
|
|
|
|
#include "fdlibm.h"
|
|
|
|
#ifdef __STDC__
|
|
double gamma_r(double x, int *signgamp)
|
|
#else
|
|
double gamma_r(x,signgamp)
|
|
double x; int *signgamp;
|
|
#endif
|
|
{
|
|
return exp (lgamma_r(x,signgamp));
|
|
}
|
|
|
|
double gamma(double x)
|
|
{
|
|
return gamma_r(x, &(_REENT_SIGNGAM(_REENT)));
|
|
}
|