# File lib/rbreadline.rb, line 8656 def _rl_find_prev_mbchar(string, seed, flags) if @encoding == 'N' return ((seed == 0) ? seed : seed - 1) end length = string.length if seed < 0 return 0 elsif length < seed return length end case @encoding when 'E' string[0,seed].scan(/./me)[0..-2].to_s.length when 'S' string[0,seed].scan(/./ms)[0..-2].to_s.length when 'U' string[0,seed].scan(/./mu)[0..-2].to_s.length when 'X' string[0,seed].force_encoding(@encoding_name)[0..-2].bytesize end end