BrainFuck.scala

/*
 * @author ananthakuaran
 */
object BrainFuck {

	val MAX_SIZE = 30000
	var pointer = 0
	val memory = new Array[Byte](MAX_SIZE)
	
	def main(args:Array[String]) = {
		execute("++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.")
	}
	
	def execute(code:String):Unit = {
			var x = 0
			while(x < code.length) {
				code(x) match {
					case '>' => pointer += 1
					case '<' => pointer -= 1
					case '+' => memory(pointer) = (memory(pointer) + 1).toByte
					case '-' => memory(pointer) = (memory(pointer) - 1).toByte
					case '.' => print(memory(pointer).toChar)
					case ',' => memory(pointer) = readByte()
					case '[' => {
							 var brackets = 1
							 val block = code.substring(x+1).takeWhile(ch => {
								 	if(ch == '[') 
								 		brackets += 1
								 	if(ch == ']')
								 		brackets -= 1
								 		
								 	!(brackets == 0)
								})
								while(memory(pointer) != 0)
								{
									execute(block)
								}
							  x += block.length + 1
							}
					case ' ' =>
					case _ => { println(code(x) + " WTF is this")} 
				}
				x += 1
			}
	}
}