class PDF::Reader::Parser

def string
  str = @buffer.token
  return "" if str == ")"
  Error.assert_equal(parse_token, ")")
  ret = ""
  idx = 0
  while idx < str.size
    chr = str[idx,1]
    jump = 1
    if chr == "\\"
      jump = 2
      case str[idx+1, 1]
      when "" then jump = 1
      when "n"  then chr = "\n"
      when "r"  then chr = "\r"
      when "t"  then chr = "\t"
      when "b"  then chr = "\b"
      when "f"  then chr = "\f"
      when "("  then chr = "("
      when ")"  then chr = ")"
      when "\\" then chr = "\\"
      when "\n" then
        chr = ""
        jump = 2
      else
        if str[idx+1,3].match(/\d{3}/)
          jump = 4
          chr = str[idx+1,3].oct.chr
        elsif str[idx+1,2].match(/\d{2}/)
          jump = 3
          chr = ("0"+str[idx+1,2]).oct.chr
        elsif str[idx+1,1].match(/\d/)
          jump = 2
          chr = ("00"+str[idx+1,1]).oct.chr
        else
          jump = 1
          chr = ""
        end
      end
    elsif chr == "\r" && str[idx+1,1] == "\n"
      chr = "\n"
      jump = 2
    elsif chr == "\n" && str[idx+1,1] == "\r"
      chr = "\n"
      jump = 2
    elsif chr == "\r"
      chr = "\n"
    end
    ret << chr
    idx += jump
  end
  ret
end