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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import randomBytes, { MAX_SIZE as kMaxUint32 } from "./_randomBytes.ts";import { Buffer } from "../../buffer.ts";
const kBufferMaxLength = 0x7fffffff;
function assertOffset(offset: number, length: number) { if (offset > kMaxUint32 || offset < 0) { throw new TypeError("offset must be a uint32"); }
if (offset > kBufferMaxLength || offset > length) { throw new RangeError("offset out of range"); }}
function assertSize(size: number, offset: number, length: number) { if (size > kMaxUint32 || size < 0) { throw new TypeError("size must be a uint32"); }
if (size + offset > length || size > kBufferMaxLength) { throw new RangeError("buffer too small"); }}
export default function randomFill( buf: Buffer, cb: (err: Error | null, buf: Buffer) => void,): void;
export default function randomFill( buf: Buffer, offset: number, cb: (err: Error | null, buf: Buffer) => void,): void;
export default function randomFill( buf: Buffer, offset: number, size: number, cb: (err: Error | null, buf: Buffer) => void,): void;
export default function randomFill( buf: Buffer, offset?: number | ((err: Error | null, buf: Buffer) => void), size?: number | ((err: Error | null, buf: Buffer) => void), cb?: (err: Error | null, buf: Buffer) => void,): void { if (typeof offset === "function") { cb = offset; offset = 0; size = buf.length; } else if (typeof size === "function") { cb = size; size = buf.length - Number(offset as number); }
assertOffset(offset as number, buf.length); assertSize(size as number, offset as number, buf.length);
randomBytes(size as number, (err, bytes) => { if (err) return cb!(err, buf); bytes?.copy(buf, offset as number); cb!(null, buf); });}
export function randomFillSync(buf: Buffer, offset = 0, size?: number) { assertOffset(offset, buf.length);
if (size === undefined) size = buf.length - offset;
assertSize(size, offset, buf.length);
const bytes = randomBytes(size);
bytes.copy(buf, offset);
return buf;}