package com.sothr.imagetools.hash.util

object HammingUtil {

	/**
	  * Calculate the hamming distance between two longs
	  *
	  * @param hash1 The first hash to compare
	  * @param hash2 The second hash to compare
	  * @return
	  */
	def getDistance(hash1: Long, hash2: Long): Int = {
		//The XOR of hash1 and hash2 is converted to a binary string
		//then the number of '1's is counted. This is the hamming distance
		(hash1 ^ hash2).toBinaryString.count(_ == '1')
	}
}