newlib/libm/mathfp/er_gamma.c

   1
   2 /* @(#)er_gamma.c 5.1 93/09/24 */
   3 /*
   4  * ====================================================
   5  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   6  *
   7  * Developed at SunPro, a Sun Microsystems, Inc. business.
   8  * Permission to use, copy, modify, and distribute this
   9  * software is freely granted, provided that this notice
  10  * is preserved.
  11  * ====================================================
  12  *
  13  */
  14
  15 /* gamma_r(x, signgamp)
  16  * Reentrant version of the logarithm of the Gamma function
  17  * with user provide pointer for the sign of Gamma(x).
  18  *
  19  * Method: See lgamma_r
  20  */
  21
  22 #include "fdlibm.h"
  23
  24 #ifdef __STDC__
  25         double gamma_r(double x, int *signgamp)
  26 #else
  27         double gamma_r(x,signgamp)
  28         double x; int *signgamp;
  29 #endif
  30 {
  31         return exp (lgamma_r(x,signgamp));
  32 }
  33
  34 double gamma(double x)
  35 {
  36   return gamma_r(x, &(_REENT_SIGNGAM(_REENT)));
  37 }