* util.c (ruby_strtod): replaced by the implementation by David

M. Gay inspired by William D. Clinger's paper "How to Read Floating
  Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101].
  a patch from Satoshi Nakagawa <snakagawa AT infoteria.co.jp>.
  [ruby-dev:31582]

* test/ruby/test_float.rb (TestFloat::test_float): add test for
  precision.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13131 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,14 @@
+Wed Aug 22 05:51:23 2007  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* util.c (ruby_strtod): replaced by the implementation by David
+	  M. Gay inspired by William D. Clinger's paper "How to Read Floating
+	  Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101].
+	  a patch from Satoshi Nakagawa <snakagawa AT infoteria.co.jp>.
+	  [ruby-dev:31582]
+
+	* test/ruby/test_float.rb (TestFloat::test_float): add test for
+	  precision.
+
 Wed Aug 22 03:51:07 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* cont.c: add Fiber#resume and Fiber.yield.

test/ruby/test_float.rb

@@ -11,6 +11,8 @@ class TestFloat < Test::Unit::TestCase
     assert_equal(3, 2.6.round)
     assert_equal(-2, (-2.4).truncate)
     assert((13.4 % 1 - 0.4).abs < 0.0001)
+    assert_equal("36893488147419111424",
+                 sprintf("%20.0f", 36893488147419107329.0))
   end
 
   def nan_test(x,y)