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* math.c (math_gamma): new method Math.gamma.

Browse source 
(math_lgamma): new method Math.lgamma.

* include/ruby/missing.h (tgamma): declared unless HAVE_TGAMMA.
  (lgamma_r): declared unless HAVE_LGAMMA_R.

* configure.in (tgamma): check for replacement funtions.
  (lgamma_r): ditto.

* missing/tgamma.c: new file.  based on gamma.c from
  "C-gengo niyoru saishin algorithm jiten" (New Algorithm handbook
  in C language) (Gijyutsu hyouron sha, Tokyo, 1991)
  by Haruhiko Okumura.

* missing/lgamma_r.c: ditto.

* LEGAL (missing/tgamma.c): describe as public domain.
  (missing/lgamma_r.c): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15388 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2008-02-07 01:43:43 +00:00
parent b88ecbcffc
commit 14373fc4db
7 changed files with 219 additions and 1 deletions
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8
include/ruby/missing.h
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@ -79,6 +79,14 @@ extern double erf(double);
extern double erfc(double);
#endif
#ifndef HAVE_TGAMMA
extern double tgamma(double);
#endif
#ifndef HAVE_LGAMMA_R
extern double lgamma_r(double, int *);
#endif
#ifndef isinf
# ifndef HAVE_ISINF
# if defined(HAVE_FINITE) && defined(HAVE_ISNAN)