Styff

xorshift32.js

@@ -0,0 +1,14 @@
+ const [XSgetSeed, XSgetNext, XSrand] = (() => {
+  const m = 2 ** 32;
+  const XSgetSeed = () => Math.floor(Math.random() * (m - 1)) + 1;
+  const s = Uint32Array.of(XSgetSeed());
+  return [XSgetSeed, XSgetNext, (seed) => XSgetNext(seed) / m];
+}
+
+  function XSgetNext(seed) {
+    if (seed !== undefined) s[0] = seed;
+    s[0] ^= s[0] << 13;
+    s[0] ^= s[0] >>> 17;
+    s[0] ^= s[0] << 5;
+    return s[0];
+  }