From dd463a9fe3ffed3a9e92c059de61d3b69bc71a5b Mon Sep 17 00:00:00 2001
From: yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 30 Nov 2008 09:22:47 +0000
Subject: merges r20348 from trunk into ruby_1_9_1. * numeric.c (num_step):
 treat infinite step specially.   [ruby-dev:37157] fix: #781.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@20409 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 numeric.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

(limited to 'numeric.c')

diff --git a/numeric.c b/numeric.c
index 042e0c306f..c2f5e60c16 100644
--- a/numeric.c
+++ b/numeric.c
@@ -1503,10 +1503,15 @@ num_step(int argc, VALUE *argv, VALUE from)
 	double err = (fabs(beg) + fabs(end) + fabs(end-beg)) / fabs(unit) * epsilon;
 	long i;
 
-	if (err>0.5) err=0.5;
-	n = floor(n + err) + 1;
-	for (i=0; i<n; i++) {
-	    rb_yield(DBL2NUM(i*unit+beg));
+	if (isinf(unit)) {
+	    if (unit > 0) rb_yield(DBL2NUM(beg));
+	}
+	else {
+	    if (err>0.5) err=0.5;
+	    n = floor(n + err) + 1;
+	    for (i=0; i<n; i++) {
+		rb_yield(DBL2NUM(i*unit+beg));
+	    }
 	}
     }
     else {
-- 
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