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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// Copyright 2017 Calvin Metcalf. All rights reserved. MIT license.
import { createHash } from "../../../internal/crypto/hash.ts";import { Buffer } from "../../../buffer.ts";
export default function (seed, len) {  let t = Buffer.alloc(0);  let i = 0;  let c;  while (t.length < len) {    c = i2ops(i++);    t = Buffer.concat([t, createHash("sha1").update(seed).update(c).digest()]);  }  return t.slice(0, len);}
function i2ops(c) {  const out = Buffer.allocUnsafe(4);  out.writeUInt32BE(c, 0);  return out;}