All files / helpers hashHelper.ts

100% Statements 15/15
100% Branches 2/2
100% Functions 1/1
100% Lines 15/15

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export const cyrb53 = (input: string, seed = 0) => {
  let h1 = 0xdeadbeef ^ seed,
    h2 = 0x41c6ce57 ^ seed;
  for (let i = 0, ch; i < input.length; i++) {
    ch = input.charCodeAt(i);
    h1 = Math.imul(h1 ^ ch, 2654435761);
    h2 = Math.imul(h2 ^ ch, 1597334677);
  }
  h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507);
  h1 ^= Math.imul(h2 ^ (h2 >>> 13), 3266489909);
  h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507);
  h2 ^= Math.imul(h1 ^ (h1 >>> 13), 3266489909);
 
  return 4294967296 * (2097151 & h2) + (h1 >>> 0);
};