setup_scanner

# File lib/rdoc/markup/parser.rb, line 427
  def setup_scanner input
    @line     = 0
    @line_pos = 0
    @input    = input.dup

    if @have_encoding and not @have_byteslice then
      @input_encoding = @input.encoding
      @binary_input   = @input.force_encoding Encoding::BINARY
    end

    @s = StringScanner.new input
  end