def string_to_bytes(str)
      unless @e.nil? || @e == :utf8
        if @e == :shift_jis
          begin
            str = str.gsub /[\\:*?"<>|\uff5e]/, '？'
            str.encode! 'Shift_JIS', :invalid => :replace, :undef => :replace, :replace => '？'
          rescue => e
          end
        end
      end
      [str].pack('a*')
    end
def string_to_bytes(str)
      unless @e.nil? || @e == :utf8
        if @e == :shift_jis
          begin
            str = str.gsub /[\\:*?"<>|\uff5e]/, '？'
            str.encode! 'Shift_JIS', :invalid => :replace, :undef => :replace, :replace => '？'
          rescue => e
          end
        end
      end
      [str].pack('a*')
    end
Create ASCII-8bits string. Also convert encoding if needed.