mirror of
https://github.com/denoland/deno.git
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ce75e31625
This commit changes "include_js_files!" macro from "deno_core"
in a way that "dir" option doesn't cause specifiers to be rewritten
to include it.
Example:
```
include_js_files! {
dir "js",
"hello.js",
}
```
The above definition required embedders to use:
`import ... from "internal:<ext_name>/js/hello.js"`.
But with this change, the "js" directory in which the files are stored
is an implementation detail, which for embedders results in:
`import ... from "internal:<ext_name>/hello.js"`.
The directory the files are stored in, is an implementation detail and
in some cases might result in a significant size difference for the
snapshot. As an example, in "deno_node" extension, we store the
source code in "polyfills" directory; which resulted in each specifier
to look like "internal:deno_node/polyfills/<module_name>", but with
this change it's "internal:deno_node/<module_name>".
Given that "deno_node" has over 100 files, many of them having
several import specifiers to the same extension, this change removes
10 characters from each import specifier.
70 lines
1.8 KiB
TypeScript
70 lines
1.8 KiB
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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import { Buffer } from "internal:deno_node/buffer.ts";
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export const MAX_RANDOM_VALUES = 65536;
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export const MAX_SIZE = 4294967295;
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function generateRandomBytes(size: number) {
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if (size > MAX_SIZE) {
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throw new RangeError(
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`The value of "size" is out of range. It must be >= 0 && <= ${MAX_SIZE}. Received ${size}`,
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);
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}
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const bytes = Buffer.allocUnsafe(size);
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//Work around for getRandomValues max generation
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if (size > MAX_RANDOM_VALUES) {
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for (let generated = 0; generated < size; generated += MAX_RANDOM_VALUES) {
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globalThis.crypto.getRandomValues(
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bytes.slice(generated, generated + MAX_RANDOM_VALUES),
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);
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}
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} else {
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globalThis.crypto.getRandomValues(bytes);
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}
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return bytes;
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}
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/**
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* @param size Buffer length, must be equal or greater than zero
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*/
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export default function randomBytes(size: number): Buffer;
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export default function randomBytes(
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size: number,
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cb?: (err: Error | null, buf?: Buffer) => void,
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): void;
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export default function randomBytes(
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size: number,
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cb?: (err: Error | null, buf?: Buffer) => void,
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): Buffer | void {
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if (typeof cb === "function") {
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let err: Error | null = null, bytes: Buffer;
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try {
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bytes = generateRandomBytes(size);
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} catch (e) {
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//NodeJS nonsense
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//If the size is out of range it will throw sync, otherwise throw async
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if (
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e instanceof RangeError &&
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e.message.includes('The value of "size" is out of range')
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) {
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throw e;
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} else if (e instanceof Error) {
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err = e;
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} else {
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err = new Error("[non-error thrown]");
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}
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}
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setTimeout(() => {
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if (err) {
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cb(err);
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} else {
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cb(null, bytes);
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}
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}, 0);
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} else {
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return generateRandomBytes(size);
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}
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}
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