merges r23695 and r23698 from trunk into ruby_1_9_1.

--
	* bignum.c (rb_big2db): (-Float::MAX.to_i*2).to_f should return
	  -HUGE_VAL (-Infinity).
--
avoid signbit() and adjust indentation.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@23789 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/bignum.c b/bignum.c
index 5a608774e7..eb021b801f 100644
--- a/bignum.c
+++ b/bignum.c
@@ -1213,7 +1213,10 @@ rb_big2dbl(VALUE x)
 
     if (isinf(d)) {
 	rb_warning("Bignum out of Float range");
-	d = HUGE_VAL;
+	if (d < 0.0)
+	    d = -HUGE_VAL;
+	else
+	    d = HUGE_VAL;
     }
     return d;
 }