case-folding.rb: perfect hash for case folding

* enc/unicode/case-folding.rb (lookup_hash): make perfect hash to
  lookup case folding table.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
case-folding.rb: perfect hash for case unfolding1

* enc/unicode/case-folding.rb (lookup_hash): make perfect hash to
  lookup case unfolding table 1.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46270 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
case-folding.rb: perfect hash for case unfolding2

* enc/unicode/case-folding.rb (lookup_hash): make perfect hash to
  lookup case unfolding table 2.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46271 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
case-folding.rb: perfect hash for case unfolding3

* enc/unicode/case-folding.rb (lookup_hash): make perfect hash to
  lookup case unfolding table 3.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46272 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
unicode.c: no initialization

* enc/unicode.c (init_case_fold_table): no longer need to
  initialize tables at runtime.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46273 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e