From 9d2c121e6a6644addf2bc2c0984b0f8e32693f7f Mon Sep 17 00:00:00 2001
From: yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 2 Feb 2009 08:07:39 +0000
Subject: merges r21945 from trunk into ruby_1_9_1. * complex.c (f_signbit):
 regard NaN as a positive value.   [ruby-dev:37861].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 complex.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'complex.c')

diff --git a/complex.c b/complex.c
index 390658b487..b3b55c6856 100644
--- a/complex.c
+++ b/complex.c
@@ -894,8 +894,10 @@ f_signbit(VALUE x)
 #else
       {
 	  char s[2];
+	  double f = RFLOAT_VALUE(x);
 
-	  (void)snprintf(s, sizeof s, "%.0f", RFLOAT_VALUE(x));
+	  if (isnan(f)) return Qfalse;
+	  (void)snprintf(s, sizeof s, "%.0f", f);
 	  return f_boolcast(s[0] == '-');
       }
 #endif
-- 
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