RubyでBF処理系

最近Rubyを勉強してます

	require 'io/console'
	memory = Array.new(30000, 0)
	pointer = 0
	director = 0
	code = open(ARGV[0], "r").read
	while director < code.size
	char = code[director]
	case char
	when ">"
	if pointer == 29999
	exit
	end
	pointer += 1
	when "<"
	if pointer == 0
	exit
	end
	pointer -= 1
	when "+"
	memory[pointer] += 1
	when "-"
	memory[pointer] -= 1
	when "."
	print memory[pointer].chr
	when ","
	memory[pointer] = getch.ord
	when "["
	if memory[pointer] == 0
	bracket = 1
	while bracket != 0
	director += 1
	bracket += 1 if code[director] == "["
	bracket -= 1 if code[director] == "]"
	end
	end
	when "]"
	bracket = 1
	while bracket != 0
	director -= 1
	bracket += 1 if code[director] == "]"
	bracket -= 1 if code[director] == "["
	end
	director -= 1
	end
	director += 1
	end

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