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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-04-06 01:17:55 (GMT)
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-04-06 01:17:55 (GMT)
commit39330d6b79c95f67006453156d8405242da04d7b (patch)
tree12ca9bb4ca84999c676c44799b495825bf9f35c9 /missing
parentbb7a4c2a00f6da4ff63f24b2db2a0aa0c44eb63f (diff)
lgamma_r.c: fix at -0.0
* math.c (ruby_lgamma_r): missing/lgamma_r.c is used on Windows, since msvcrt does not provide it. * missing/lgamma_r.c (lgamma_r): fix lgamma(-0.0). [ruby-core:74823] [Bug #12249] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54496 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'missing')
-rw-r--r--missing/lgamma_r.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/missing/lgamma_r.c b/missing/lgamma_r.c
index 6d2f38f..01066d2 100644
--- a/missing/lgamma_r.c
+++ b/missing/lgamma_r.c
@@ -66,7 +66,7 @@ lgamma_r(double x, int *signp)
double i, f, s;
f = modf(-x, &i);
if (f == 0.0) { /* pole error */
- *signp = 1;
+ *signp = signbit(x) ? -1 : 1;
errno = ERANGE;
return HUGE_VAL;
}