#include "GateXor.h"

GateXor GateXor::instance(GateXor::type);

SignalLevel GateXor::level() {
	int highCount = 0;
	for (int i = 0; i < this->inputs.size(); i++) {
		SignalLevel l = this->inputs[i]->getLevel();

		if (l == UNDEFINED) return UNDEFINED;
		if (l == HIGH) highCount++;
	}
	return (highCount % 2 == 1) ? HIGH : LOW;
}

GateXor::GateXor(const GateXor *prototype) : Node() {}

GateXor *GateXor::clone() const {
	return new GateXor(this);
}