1 /* @(#)w_gamma_r.c 5.1 93/09/24 */ 2 /* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13 #ifndef lint 14 static char rcsid[] = "$Id: w_gamma_r.c,v 1.3 1994/02/18 02:27:30 jtc Exp $"; 15 #endif 16 17 /* 18 * wrapper double gamma_r(double x, int *signgamp) 19 */ 20 21 #include <math.h> 22 23 24 #ifdef __STDC__ 25 double gamma_r(double x, int *signgamp) /* wrapper lgamma_r */ 26 #else 27 double gamma_r(x,signgamp) /* wrapper lgamma_r */ 28 double x; int *signgamp; 29 #endif 30 { 31 #ifdef _IEEE_LIBM 32 return __ieee754_gamma_r(x,signgamp); 33 #else 34 double y; 35 y = __ieee754_gamma_r(x,signgamp); 36 if(_LIB_VERSION == _IEEE_) return y; 37 if(!finite(y)&&finite(x)) { 38 if(floor(x)==x&&x<=0.0) 39 return __kernel_standard(x,x,41); /* gamma pole */ 40 else 41 return __kernel_standard(x,x,40); /* gamma overflow */ 42 } else 43 return y; 44 #endif 45 } 46