#--
# DO NOT MODIFY!!!!
# This file is automatically generated by rex 1.0.5
# from lexical definition file "c.rex".
#++

require 'racc/parser'
class C < Racc::Parser
  require 'strscan'

  class ScanError < StandardError ; end

  attr_reader   :lineno
  attr_reader   :filename
  attr_accessor :state

  def scan_setup(str)
    @ss = StringScanner.new(str)
    @lineno =  1
    @state  = nil
  end

  def action
    yield
  end

  def scan_str(str)
    scan_setup(str)
    do_parse
  end
  alias :scan :scan_str

  def load_file( filename )
    @filename = filename
    open(filename, "r") do |f|
      scan_setup(f.read)
    end
  end

  def scan_file( filename )
    load_file(filename)
    do_parse
  end


  def next_token
    return if @ss.eos?
    
    # skips empty actions
    until token = _next_token or @ss.eos?; end
    token
  end

  def _next_token
    text = @ss.peek(1)
    @lineno  +=  1  if text == "\n"
    token = case @state
    when nil
      case
      when (text = @ss.scan(/\/\/.+/))
         action {}

      when (text = @ss.scan(/(\w+:)?[A-Z]+\s.+;/))
         action { [:ASM,text]}

      when (text = @ss.scan(/(\w+:).*;/))
         action { [:ASM,text]}

      when (text = @ss.scan(/0x[0-9a-f]+/))
         action { [:NUM, text.to_i(16)] }

      when (text = @ss.scan(/\d+/))
         action { [:NUM, text.to_i] }

      when (text = @ss.scan(/[ ]+/))
         action { }

      when (text = @ss.scan(/\n/))
         action { }

      when (text = @ss.scan(/;/))
         action { [:SEMICOLON,text] }

      when (text = @ss.scan(/\(/))
         action { [:LPAREN,text] }

      when (text = @ss.scan(/\)/))
         action { [:RPAREN,text] }

      when (text = @ss.scan(/,/))
         action { [:COMMA,text] }

      when (text = @ss.scan(/:/))
         action { [:COLON,text]}

      when (text = @ss.scan(/=/))
         action { [:EQUAL,text]}

      when (text = @ss.scan(/\*/))
         action { [:ASTERISK,text]}

      when (text = @ss.scan(/\[/))
         action { [:LBRACK,text]}

      when (text = @ss.scan(/\]/))
         action { [:RBRACK,text]}

      when (text = @ss.scan(/\{/))
         action { [:LCURL,text]}

      when (text = @ss.scan(/\}/))
         action { [:RCURL,text]}

      when (text = @ss.scan(/\+/))
         action { [:PLUS,text]}

      when (text = @ss.scan(/-/))
         action { [:MINUS,text]}

      when (text = @ss.scan(/\|/))
         action { [:PIPE,text]}

      when (text = @ss.scan(/~/))
         action { [:TILDE,text]}

      when (text = @ss.scan(/>/))
         action { [:GT,text]}

      when (text = @ss.scan(/char/))
         action { [:TYPE,text]}

      when (text = @ss.scan(/short/))
         action { [:TYPE,text]}

      when (text = @ss.scan(/int/))
         action { [:TYPE,text]}

      when (text = @ss.scan(/long/))
         action { [:TYPE,text]}

      when (text = @ss.scan(/while/))
         action { [:WHILE,text]}

      when (text = @ss.scan(/for/))
         action { [:FOR,text]}

      when (text = @ss.scan(/extern/))
         action { [:EXTERN,text]}

      when (text = @ss.scan(/\w+/))
         action { [:IDENT,text]}

      when (text = @ss.scan(/./))
         action { [:UNK,text]}

      else
        text = @ss.string[@ss.pos .. -1]
        raise  ScanError, "can not match: '" + text + "'"
      end  # if

    else
      raise  ScanError, "undefined state: '" + state.to_s + "'"
    end  # case state
    token
  end  # def _next_token

  def tokenize(code)
    scan_setup(code)
    tokens = []
    while token = next_token
      tokens << token
    end
    tokens
  end
  def make_bytes(val)
    bytes=[]
    8.times do |i|
      mask=0xFF << i*8
      byte=(val&mask) >> i*8
      bytes.push byte
    end
    return bytes
  end
end # class