Shoud use nsec in substitution for subsec. Merged with Ruby 1.9.

 - Fixed the #926, #927

git-svn-id: http://svn.macosforge.org/repository/ruby/MacRuby/trunk@4571 23306eb0-4c56-4727-a40e-e92c0eb68959

lib/date.rb

@@ -1787,7 +1787,7 @@ def to_date
   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(subsec, 86400)
+      Rational(nsec, 86400_000_000_000)
     of = Rational(utc_offset, 86400)
     DateTime.new!(DateTime.__send__(:jd_to_ajd, jd, fr, of),
 		  of, DateTime::ITALY)
@@ -1817,7 +1817,7 @@ def self.now(sg=ITALY)
     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.subsec, 86400)
+      Rational(t.nsec, 86400_000_000_000)
     of = Rational(t.utc_offset, 86400)
     new!(jd_to_ajd(jd, fr, of), of, sg)
   end

lib/time.rb

@@ -513,12 +513,14 @@ def httpdate
   #     require 'time'
   #
   def xmlschema(fraction_digits=0)
-    sprintf('%0*d-%02d-%02dT%02d:%02d:%02d',
-      year < 0 ? 5 : 4, year, mon, day, hour, min, sec) +
+    sprintf('%d-%02d-%02dT%02d:%02d:%02d',
+      year, mon, day, hour, min, sec) +
     if fraction_digits == 0
       ''
+    elsif fraction_digits <= 9
+      '.' + sprintf('%09d', nsec)[0, fraction_digits]
     else
-      '.' + sprintf('%0*d', fraction_digits, (subsec * 10**fraction_digits).floor)
+      '.' + sprintf('%09d', nsec) + '0' * (fraction_digits - 9)
     end +
     if utc?
       'Z'