* enc/unicode/case-folding.rb, casefold.h: Reducing size of TitleCase

  table by eliminating duplicates.
  (with Kimihito Matsui)


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53957 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 2 deletions

diff --git a/enc/unicode/case-folding.rb b/enc/unicode/case-folding.rb
index dfb5f47314..cd14b6e6f1 100755
--- a/enc/unicode/case-folding.rb
+++ b/enc/unicode/case-folding.rb
@@ -238,8 +238,11 @@ class CaseMapping
       flags += '|U'  if to==item.upper
       flags += '|D'  if to==item.lower
       unless item.upper == item.title
-        flags += "|T(#{@titlecase.length})"
-        @titlecase << item
+        unless title_index = @titlecase.find_index { |i| i.title==item.title }
+          title_index = @titlecase.length
+          @titlecase << item
+        end
+        flags += "|T(#{title_index})"
       end
     end
     flags