📦 deps(thirdparty): update snapshots

2026-07-18 00:02:59 +00:00
parent 82f7c6e56a
commit 47ce7f78dc
1446 changed files with 141041 additions and 6442 deletions
@@ -0,0 +1,48 @@
+import crypto from "node:crypto";
+
+const MASK = (1n << 64n) - 1n;
+
+function rotateLeft(value, amount) {
+  const shift = BigInt(amount);
+  return ((value << shift) | (value >> (64n - shift))) & MASK;
+}
+
+export function deriveState(rootSeedHex, namespace) {
+  const key = Buffer.from(rootSeedHex, "hex");
+  if (key.length !== 32) throw new Error("Root seed must be exactly 256 bits");
+  let attempt = namespace;
+  for (let retry = 0; retry < 100; retry += 1) {
+    const bytes = crypto.createHmac("sha256", key).update(attempt, "utf8").digest();
+    const state = [0, 8, 16, 24].map((offset) => bytes.readBigUInt64BE(offset));
+    if (state.some((word) => word !== 0n)) return state;
+    attempt = `${namespace}/retry/${retry + 1}`;
+  }
+  throw new Error("Could not derive a non-zero xoshiro256** state");
+}
+
+export function nextUint64(state) {
+  const result = (rotateLeft((state[1] * 5n) & MASK, 7) * 9n) & MASK;
+  const temporary = (state[1] << 17n) & MASK;
+  state[2] ^= state[0];
+  state[3] ^= state[1];
+  state[1] ^= state[2];
+  state[0] ^= state[3];
+  state[2] ^= temporary;
+  state[3] = rotateLeft(state[3], 45);
+  return result;
+}
+
+export function sampleInteger(state, upperExclusive) {
+  if (!Number.isSafeInteger(upperExclusive) || upperExclusive <= 0) {
+    throw new TypeError("upperExclusive must be a positive safe integer");
+  }
+  const bound = BigInt(upperExclusive);
+  const limit = (1n << 64n) - ((1n << 64n) % bound);
+  let value;
+  do value = nextUint64(state); while (value >= limit);
+  return Number(value % bound);
+}
+
+export function stateHex(state) {
+  return state.map((word) => word.toString(16).padStart(16, "0")).join("");
+}