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Common functionality Java library
package com.github.akurilov.commons.math;
public interface MathUtil {
/**
* Greatest common divisor
*/
static int gcd(final int x, final int y) {
int z = 0;
if(x > y) {
for(int i = y; i > 0; i --) {
if(x % i == 0 && y % i == 0) {
z = i;
break;
}
}
} else if(x < y) {
for(int i = x; i > 0; i --) {
if(x % i == 0 && y % i == 0) {
z = i;
break;
}
}
} else {
z = x;
}
return z;
}
/**
* XOrShift algorithm. For details see: http://xorshift.di.unimi.it/murmurhash3.c
*/
int A = 21, B = 35, C = 4;
static long xorShift(long word) {
word ^= (word << A);
word ^= (word >>> B);
word ^= (word << C);
return word;
}
}