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//number automata implementation
/* A number automatan, is a machine which holds one state, a number. It
is a conjoining of two seperate machines. One is the state of it's acceptance,
be it addition, "+", subtraction"-", and so on. These allow other number symbols to be input,
and change the state of the machine.*/

var NumberMach = (function(){
	//object to hold transition functions
	var States = {
		"+":function(obj, val){
			obj.state += val;
		},
		"-":function(obj, val){
			obj.state -= val;
		},
		"*":function(obj, val){
			obj.state *= val;
		},
		"/":function(obj, val){
			obj.state /= val;
		},
		"//":function(obj, val){
			obj.state = Math.floor(obj.state / val);
		},
		"%":function(obj, val){
			obj.state %= val;
		}
	};
	function NumberMach(state, mode){
		this.state = state;
		this.mode = mode;
	}
	//function that takes input in form of either a number or a different transition 
	//function mode as input
	NumberMach.prototype.input = function(code){
		var numresult = parseInt(code);
		if(isNaN(numresult)){
			if(code in States){
				this.mode = code;
			}
		}
		else {
			States[this.mode](this, numresult);
		}
	};
	return NumberMach;
})();

/*    var b = new NumberMach(0, "+");
   b.input("55")
   b
=> { state: 55, mode: '+' }
   b.input("5")
   b
=> { state: 60, mode: '+' }
   b.input("-")
   b
=> { state: 60, mode: '-' }
   b.input("5")
   b
=> { state: 55, mode: '-' }
   b.input("55")
   b
=> { state: 0, mode: '-' }*/