* lib/date.rb: use subsec instead of nsec.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23377 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Sat May  9 19:23:46 2009  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* lib/date.rb: use subsec instead of nsec.
+
 Sat May  9 12:19:49 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* hash.c: 3rd arguemnt of rb_hash_foreach() is VALUE.

lib/date.rb

@@ -1775,7 +1775,7 @@ class Time
   def to_datetime
     jd = DateTime.__send__(:civil_to_jd, year, mon, mday, DateTime::ITALY)
     fr = DateTime.__send__(:time_to_day_fraction, hour, min, [sec, 59].min) +
-      Rational(nsec, 86400_000_000_000)
+      Rational(subsec, 86400)
     of = Rational(utc_offset, 86400)
     DateTime.new!(DateTime.__send__(:jd_to_ajd, jd, fr, of),
 		  of, DateTime::ITALY)
@@ -1805,7 +1805,7 @@ class Date
     t = Time.now
     jd = civil_to_jd(t.year, t.mon, t.mday, sg)
     fr = time_to_day_fraction(t.hour, t.min, [t.sec, 59].min) +
-      Rational(t.nsec, 86400_000_000_000)
+      Rational(t.subsec, 86400)
     of = Rational(t.utc_offset, 86400)
     new!(jd_to_ajd(jd, fr, of), of, sg)
   end

test/date/test_date_conv.rb

@@ -49,6 +49,13 @@ class TestDateConv < Test::Unit::TestCase
       assert_equal([2004, 9, 19, 1, 2, 3, 456789123],
 		   [t.year, t.mon, t.mday, t.hour, t.min, t.sec, t.nsec])
     end
+
+    if Time.allocate.respond_to?(:subsec)
+      d = DateTime.new(2004, 9, 19, 1, 2, 3, 0) + 456789123456789123.to_r/86400000000000000000000
+      t = d.to_time.utc
+      assert_equal([2004, 9, 19, 1, 2, 3, Rational(456789123456789123,1000000000000000000)],
+		   [t.year, t.mon, t.mday, t.hour, t.min, t.sec, t.subsec])
+    end
   end
 
   def test_to_date__from_time