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w_lgamma_r.c
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1 
2 /* @(#)w_lgamma_r.c 1.3 95/01/18 */
3 /*
4  * ====================================================
5  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6  *
7  * Developed at SunSoft, 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  * wrapper double lgamma_r(double x, int *signgamp)
16  */
17 
18 #include "fdlibm.h"
19 
20 
21 #ifdef __STDC__
22  double lgamma_r(double x, int *signgamp) /* wrapper lgamma_r */
23 #else
24  double lgamma_r(x,signgamp) /* wrapper lgamma_r */
25  double x; int *signgamp;
26 #endif
27 {
28 #ifdef _IEEE_LIBM
29  return __ieee754_lgamma_r(x,signgamp);
30 #else
31  double y;
32  y = __ieee754_lgamma_r(x,signgamp);
33  if(_LIB_VERSION == _IEEE_) return y;
34  if(!finite(y)&&finite(x)) {
35  if(floor(x)==x&&x<=0.0)
36  return __kernel_standard(x,x,15); /* lgamma pole */
37  else
38  return __kernel_standard(x,x,14); /* lgamma overflow */
39  } else
40  return y;
41 #endif
42 }