# File lib/rbreadline.rb, line 8703 def _rl_get_char_len(src) return 0 if src[0,1] == 0.chr || src.length==0 case @encoding when 'E' len = src.scan(/./me)[0].to_s.length when 'S' len = src.scan(/./ms)[0].to_s.length when 'U' len = src.scan(/./mu)[0].to_s.length when 'X' src = src.dup.force_encoding(@encoding_name) len = src.valid_encoding? ? src[0].bytesize : 0 else len = 1 end len==0 ? -2 : len end