From 274fa77e3f3620cbd496952f622e930ea6951f02 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 2 Sep 2009 04:47:39 +0000
Subject: * math.c (domain_check): simplified.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24737 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog |  4 ++++
 math.c    | 15 ++++++---------
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index f7c5334e80..4eef45eb8e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Sep  2 13:47:30 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* math.c (domain_check): simplified.
+
 Wed Sep  2 11:32:24 2009  Koichi Sasada  <ko1@atdot.net>
 
 	* gc.c (obj_free): fix to free method table (fix memory leak).
diff --git a/math.c b/math.c
index 2734280b32..5ce16e805e 100644
--- a/math.c
+++ b/math.c
@@ -25,21 +25,18 @@ extern VALUE rb_to_float(VALUE val);
 static void
 domain_check(double x, double y, const char *msg)
 {
-    while(1) {
-	if (errno) {
-	    rb_sys_fail(msg);
-	}
-	if (isnan(y)) {
-	    if (isnan(x)) break;
+    if (!isnan(y)) return;
+    else if (isnan(x)) return;
+    else {
+	if (!errno) {
 #if defined(EDOM)
 	    errno = EDOM;
-#elif defined(ERANGE)
+#else
 	    errno = ERANGE;
 #endif
-	    continue;
 	}
-	break;
     }
+    rb_sys_fail(msg);
 }
 
 static void
-- 
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