From 34304a667d2560fd7477c80566f5c4c18313e49d Mon Sep 17 00:00:00 2001
From: yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 21 Jun 2009 10:35:50 +0000
Subject: merges r23742 from trunk into ruby_1_9_1. -- * numeric.c (flo_cmp):
 should always return nil for NaN.

* numeric.c (flo_cmp): handle infinite value specially using
  infinite? method internally.  [ruby-dev:38681]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@23803 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 numeric.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'numeric.c')

diff --git a/numeric.c b/numeric.c
index 6f59c98a47..a3cb3be1c8 100644
--- a/numeric.c
+++ b/numeric.c
@@ -926,6 +926,7 @@ flo_cmp(VALUE x, VALUE y)
     double a, b;
 
     a = RFLOAT_VALUE(x);
+    if (isnan(a)) return Qnil;
     switch (TYPE(y)) {
       case T_FIXNUM:
 	b = (double)FIX2LONG(y);
@@ -944,6 +945,11 @@ flo_cmp(VALUE x, VALUE y)
 	break;
 
       default:
+	if (isinf(a) && (!rb_respond_to(y, rb_intern("infinite?")) ||
+			 !RTEST(rb_funcall(y, rb_intern("infinite?"), 0, 0)))) {
+	    if (a > 0.0) return INT2FIX(1);
+	    return INT2FIX(-1);
+	}
 	return rb_num_coerce_cmp(x, y, rb_intern("<=>"));
     }
     return rb_dbl_cmp(a, b);
-- 
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