From 3a083985a471ca3d8429146f9f18dead6747c203 Mon Sep 17 00:00:00 2001
From: shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 16 Nov 2018 01:52:39 +0000
Subject: avoid division by zero

* cvt(): use signbit() instead of 1/d < 0
* w_float(): ditto
* ruby_float_step_size(): unit==0 check shall be prior to divisions
* arith_seq_float_step_size(): ditto
* rb_big_divide(): same as r65642
* fix_divide(): ditto
* rb_big_fdiv_double(): ditto
* fix_fdiv_double(): ditto


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65751 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 vsnprintf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'vsnprintf.c')

diff --git a/vsnprintf.c b/vsnprintf.c
index d221e757bf..04184d7a6a 100644
--- a/vsnprintf.c
+++ b/vsnprintf.c
@@ -1250,7 +1250,7 @@ cvt(double value, int ndigits, int flags, char *sign, int *decpt, int ch, int *l
 	if (value < 0) {
 		value = -value;
 		*sign = '-';
-	} else if (value == 0.0 && 1.0/value < 0) {
+	} else if (value == 0.0 && signbit(value)) {
 	    *sign = '-';
 	} else {
 	    *sign = '\000';
-- 
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