naruse	2008-03-05 22:54:36 +0900 (Wed, 05 Mar 2008)

  New Revision: 15695

  Modified files:
    trunk/ChangeLog
    trunk/string.c

  Log:
    * string.c (is_utf8_lead_byte, count_utf8_lead_bytes_with_ulong):
      defined for UTF-8 optimization.
    
    * string.c (str_strlen): use is_utf8_lead_byte and
      count_utf8_lead_bytes_with_ulong.
    
    * string.c (str_utf8_nth) ditto.

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/string.c?r1=15695&r2=15694&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/ChangeLog?r1=15695&r2=15694&diff_format=u