Merge commit 'rails/master'

Conflicts:
	activerecord/lib/active_record/associations.rb

1 files changed, 30 insertions, 6 deletions

diff --git a/activesupport/lib/active_support/multibyte.rb b/activesupport/lib/active_support/multibyte.rb
index d8d58f3bce..6f2016a409 100644
--- a/activesupport/lib/active_support/multibyte.rb
+++ b/activesupport/lib/active_support/multibyte.rb
@@ -1,9 +1,5 @@
 # encoding: utf-8
 
-require 'active_support/multibyte/chars'
-require 'active_support/multibyte/exceptions'
-require 'active_support/multibyte/unicode_database'
-
 require 'active_support/core_ext/module/attribute_accessors'
 
 module ActiveSupport #:nodoc:
@@ -29,7 +25,35 @@ module ActiveSupport #:nodoc:
     #
     # Example:
     #   ActiveSupport::Multibyte.proxy_class = CharsForUTF32
-    mattr_accessor :proxy_class
-    self.proxy_class = ActiveSupport::Multibyte::Chars
+    def self.proxy_class=(klass)
+      @proxy_class = klass
+    end
+
+    # Returns the currect proxy class
+    def self.proxy_class
+      @proxy_class ||= ActiveSupport::Multibyte::Chars
+    end
+
+    # Regular expressions that describe valid byte sequences for a character
+    VALID_CHARACTER = {
+      # Borrowed from the Kconv library by Shinji KONO - (also as seen on the W3C site)
+      'UTF-8' => /\A(?:
+                  [\x00-\x7f]                                         |
+                  [\xc2-\xdf] [\x80-\xbf]                             |
+                  \xe0        [\xa0-\xbf] [\x80-\xbf]                 |
+                  [\xe1-\xef] [\x80-\xbf] [\x80-\xbf]                 |
+                  \xf0        [\x90-\xbf] [\x80-\xbf] [\x80-\xbf]     |
+                  [\xf1-\xf3] [\x80-\xbf] [\x80-\xbf] [\x80-\xbf]     |
+                  \xf4        [\x80-\x8f] [\x80-\xbf] [\x80-\xbf])\z /xn,
+      # Quick check for valid Shift-JIS characters, disregards the odd-even pairing
+      'Shift_JIS' => /\A(?:
+                  [\x00-\x7e \xa1-\xdf]                                     |
+                  [\x81-\x9f \xe0-\xef] [\x40-\x7e \x80-\x9e \x9f-\xfc])\z /xn
+    }
   end
 end
+
+require 'active_support/multibyte/chars'
+require 'active_support/multibyte/exceptions'
+require 'active_support/multibyte/unicode_database'
+require 'active_support/multibyte/utils'