import { allocUnsafe } from "./alloc.ts";
import { asUint8Array } from "./util.ts";

/**
 * Returns the xor distance between two Uint8Arrays
 */
export function xor(a: Uint8Array, b: Uint8Array): Uint8Array {
  if (a.length !== b.length) {
    throw new Error("Inputs should have the same length");
  }

  const result = allocUnsafe(a.length);

  for (let i = 0; i < a.length; i++) {
    result[i] = a[i] ^ b[i];
  }

  return asUint8Array(result);
}