summaryrefslogtreecommitdiff
path: root/js/util.ts
diff options
context:
space:
mode:
Diffstat (limited to 'js/util.ts')
-rw-r--r--js/util.ts225
1 files changed, 0 insertions, 225 deletions
diff --git a/js/util.ts b/js/util.ts
deleted file mode 100644
index 013dc7ee1..000000000
--- a/js/util.ts
+++ /dev/null
@@ -1,225 +0,0 @@
-// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
-import { TypedArray } from "./types.ts";
-import { window } from "./window.ts";
-
-let logDebug = false;
-let logSource = "JS";
-
-// @internal
-export function setLogDebug(debug: boolean, source?: string): void {
- logDebug = debug;
- if (source) {
- logSource = source;
- }
-}
-
-/** Debug logging for deno.
- * Enable with the `--log-debug` or `-D` command line flag.
- * @internal
- */
-export function log(...args: unknown[]): void {
- if (logDebug) {
- // if we destructure `console` off `window` too early, we don't bind to
- // the right console, therefore we don't log anything out.
- window.console.log(`DEBUG ${logSource} -`, ...args);
- }
-}
-
-// @internal
-export function assert(cond: boolean, msg = "assert"): void {
- if (!cond) {
- throw Error(msg);
- }
-}
-
-// @internal
-export function typedArrayToArrayBuffer(ta: TypedArray): ArrayBuffer {
- const ab = ta.buffer.slice(ta.byteOffset, ta.byteOffset + ta.byteLength);
- return ab as ArrayBuffer;
-}
-
-// @internal
-export function arrayToStr(ui8: Uint8Array): string {
- return String.fromCharCode(...ui8);
-}
-
-/** A `Resolvable` is a Promise with the `reject` and `resolve` functions
- * placed as methods on the promise object itself. It allows you to do:
- *
- * const p = createResolvable<number>();
- * // ...
- * p.resolve(42);
- *
- * It'd be prettier to make `Resolvable` a class that inherits from `Promise`,
- * rather than an interface. This is possible in ES2016, however typescript
- * produces broken code when targeting ES5 code.
- *
- * At the time of writing, the GitHub issue is closed in favour of a proposed
- * solution that is awaiting feedback.
- *
- * @see https://github.com/Microsoft/TypeScript/issues/15202
- * @see https://github.com/Microsoft/TypeScript/issues/15397
- * @internal
- */
-
-export interface ResolvableMethods<T> {
- resolve: (value?: T | PromiseLike<T>) => void;
- // eslint-disable-next-line @typescript-eslint/no-explicit-any
- reject: (reason?: any) => void;
-}
-
-// @internal
-export type Resolvable<T> = Promise<T> & ResolvableMethods<T>;
-
-// @internal
-export function createResolvable<T>(): Resolvable<T> {
- let methods: ResolvableMethods<T>;
- const promise = new Promise<T>(
- (resolve, reject): void => {
- methods = { resolve, reject };
- }
- );
- // TypeScript doesn't know that the Promise callback occurs synchronously
- // therefore use of not null assertion (`!`)
- return Object.assign(promise, methods!) as Resolvable<T>;
-}
-
-// @internal
-export function notImplemented(): never {
- throw new Error("Not implemented");
-}
-
-// @internal
-export function unreachable(): never {
- throw new Error("Code not reachable");
-}
-
-// @internal
-export function hexdump(u8: Uint8Array): string {
- return Array.prototype.map
- .call(
- u8,
- (x: number): string => {
- return ("00" + x.toString(16)).slice(-2);
- }
- )
- .join(" ");
-}
-
-// @internal
-export function containsOnlyASCII(str: string): boolean {
- if (typeof str !== "string") {
- return false;
- }
- return /^[\x00-\x7F]*$/.test(str);
-}
-
-const TypedArrayConstructor = Object.getPrototypeOf(Uint8Array);
-export function isTypedArray(x: unknown): x is TypedArray {
- return x instanceof TypedArrayConstructor;
-}
-
-// Returns whether o is an object, not null, and not a function.
-// @internal
-export function isObject(o: unknown): o is object {
- return o != null && typeof o === "object";
-}
-
-// Returns whether o is iterable.
-export function isIterable<T, P extends keyof T, K extends T[P]>(
- o: T
-): o is T & Iterable<[P, K]> {
- // checks for null and undefined
- if (o == null) {
- return false;
- }
- return (
- typeof ((o as unknown) as Iterable<[P, K]>)[Symbol.iterator] === "function"
- );
-}
-
-// @internal
-export function requiredArguments(
- name: string,
- length: number,
- required: number
-): void {
- if (length < required) {
- const errMsg = `${name} requires at least ${required} argument${
- required === 1 ? "" : "s"
- }, but only ${length} present`;
- throw new TypeError(errMsg);
- }
-}
-
-// @internal
-export function immutableDefine(
- // eslint-disable-next-line @typescript-eslint/no-explicit-any
- o: any,
- p: string | number | symbol,
- // eslint-disable-next-line @typescript-eslint/no-explicit-any
- value: any
-): void {
- Object.defineProperty(o, p, {
- value,
- configurable: false,
- writable: false
- });
-}
-
-// Returns values from a WeakMap to emulate private properties in JavaScript
-export function getPrivateValue<
- K extends object,
- V extends object,
- W extends keyof V
->(instance: K, weakMap: WeakMap<K, V>, key: W): V[W] {
- if (weakMap.has(instance)) {
- return weakMap.get(instance)![key];
- }
- throw new TypeError("Illegal invocation");
-}
-
-/**
- * Determines whether an object has a property with the specified name.
- * Avoid calling prototype builtin `hasOwnProperty` for two reasons:
- *
- * 1. `hasOwnProperty` is defined on the object as something else:
- *
- * const options = {
- * ending: 'utf8',
- * hasOwnProperty: 'foo'
- * };
- * options.hasOwnProperty('ending') // throws a TypeError
- *
- * 2. The object doesn't inherit from `Object.prototype`:
- *
- * const options = Object.create(null);
- * options.ending = 'utf8';
- * options.hasOwnProperty('ending'); // throws a TypeError
- *
- * @param obj A Object.
- * @param v A property name.
- * @see https://eslint.org/docs/rules/no-prototype-builtins
- * @internal
- */
-export function hasOwnProperty<T>(obj: T, v: PropertyKey): boolean {
- if (obj == null) {
- return false;
- }
- return Object.prototype.hasOwnProperty.call(obj, v);
-}
-
-/**
- * Split a number into two parts: lower 32 bit and higher 32 bit
- * (as if the number is represented as uint64.)
- *
- * @param n Number to split.
- * @internal
- */
-export function splitNumberToParts(n: number): number[] {
- // JS bitwise operators (OR, SHIFT) operate as if number is uint32.
- const lower = n | 0;
- // This is also faster than Math.floor(n / 0x100000000) in V8.
- const higher = (n - lower) / 0x100000000;
- return [lower, higher];
-}