Add a PRNG

2024-01-12 21:35:35 -05:00 · 2024-01-12 21:35:35 -05:00 · 11d1fbec34
commit 11d1fbec34
parent 5f2a2cdc05
1 changed files with 10 additions and 0 deletions
--- a/lib/prng.ts
+++ b/lib/prng.ts
@ -0,0 +1,10 @@
+export type Prng = () => number;
+
+export function mulberry32(state: number) {
+  return function () {
+    let t = (state += 0x6d2b79f5);
+    t = Math.imul(t ^ (t >>> 15), t | 1);
+    t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
+    return (t ^ (t >>> 14)) >>> 0;
+  };
+}