1 files changed, 44 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/multibyte/handlers/utf8_handler_proc.rb b/activesupport/lib/active_support/multibyte/handlers/utf8_handler_proc.rb
new file mode 100644
index 0000000000..f551af6cc7
--- /dev/null
+++ b/activesupport/lib/active_support/multibyte/handlers/utf8_handler_proc.rb
@@ -0,0 +1,44 @@
+# Methods in this handler call functions in the utf8proc ruby extension. These are significantly faster than the
+# pure ruby versions. Chars automatically uses this handler when it can load the utf8proc extension. For
+# documentation on handler methods see UTF8Handler.
+class ActiveSupport::Multibyte::Handlers::UTF8HandlerProc < ActiveSupport::Multibyte::Handlers::UTF8Handler
+  
+  class << self
+    def normalize(str, form=ActiveSupport::Multibyte::DEFAULT_NORMALIZATION_FORM) #:nodoc:
+      codepoints = str.unpack('U*')
+      case form
+        when :d
+          utf8map(str, :stable)
+        when :c
+          utf8map(str, :stable, :compose)
+        when :kd
+          utf8map(str, :stable, :compat)
+        when :kc
+          utf8map(str, :stable, :compose, :compat)
+        else
+          raise ArgumentError, "#{form} is not a valid normalization variant", caller
+      end
+    end
+    
+    def decompose(str) #:nodoc:
+      utf8map(str, :stable)
+    end
+    
+    def downcase(str) #:nodoc:c
+      utf8map(str, :casefold)
+    end
+    
+    protected
+    
+    def utf8map(str, *option_array) #:nodoc:
+      options = 0
+      option_array.each do |option|
+        flag = Utf8Proc::Options[option]
+        raise ArgumentError, "Unknown argument given to utf8map." unless
+          flag
+        options |= flag
+      end
+      return Utf8Proc::utf8map(str, options)
+    end
+  end
+end