w_lgamma_r.c 1.3 KB

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  1. /* @(#)wr_lgamma.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. #if defined(LIBM_SCCS) && !defined(lint)
  13. static char rcsid[] = "$NetBSD: w_lgamma_r.c,v 1.6 1995/05/10 20:49:27 jtc Exp $";
  14. #endif
  15. /*
  16. * wrapper double lgamma_r(double x, int *signgamp)
  17. */
  18. #include "math.h"
  19. #include "math_private.h"
  20. #ifdef __STDC__
  21. double lgamma_r(double x, int *signgamp) /* wrapper lgamma_r */
  22. #else
  23. double lgamma_r(x,signgamp) /* wrapper lgamma_r */
  24. double x; int *signgamp;
  25. #endif
  26. {
  27. #ifdef _IEEE_LIBM
  28. return __ieee754_lgamma_r(x,signgamp);
  29. #else
  30. double y;
  31. y = __ieee754_lgamma_r(x,signgamp);
  32. if(_LIB_VERSION == _IEEE_) return y;
  33. if(!finite(y)&&finite(x)) {
  34. if(floor(x)==x&&x<=0.0)
  35. return __kernel_standard(x,x,15); /* lgamma pole */
  36. else
  37. return __kernel_standard(x,x,14); /* lgamma overflow */
  38. } else
  39. return y;
  40. #endif
  41. }