mirror of
https://github.com/denoland/deno
synced 2024-10-13 19:42:29 +00:00
111 lines
3.7 KiB
TypeScript
111 lines
3.7 KiB
TypeScript
export function notImplemented(msg?: string): never {
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const message = msg ? `Not implemented: ${msg}` : "Not implemented";
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throw new Error(message);
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}
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export type _TextDecoder = typeof TextDecoder.prototype;
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export const _TextDecoder = TextDecoder;
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export type _TextEncoder = typeof TextEncoder.prototype;
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export const _TextEncoder = TextEncoder;
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// API helpers
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export type MaybeNull<T> = T | null;
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export type MaybeDefined<T> = T | undefined;
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export type MaybeEmpty<T> = T | null | undefined;
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export function intoCallbackAPI<T>(
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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func: (...args: any[]) => Promise<T>,
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cb: MaybeEmpty<(err: MaybeNull<Error>, value: MaybeEmpty<T>) => void>,
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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...args: any[]
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): void {
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func(...args)
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.then((value) => cb && cb(null, value))
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.catch((err) => cb && cb(err, null));
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}
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export function intoCallbackAPIWithIntercept<T1, T2>(
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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func: (...args: any[]) => Promise<T1>,
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interceptor: (v: T1) => T2,
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cb: MaybeEmpty<(err: MaybeNull<Error>, value: MaybeEmpty<T2>) => void>,
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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...args: any[]
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): void {
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func(...args)
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.then((value) => cb && cb(null, interceptor(value)))
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.catch((err) => cb && cb(err, null));
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}
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export function spliceOne(list: string[], index: number): void {
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for (; index + 1 < list.length; index++) list[index] = list[index + 1];
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list.pop();
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}
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// Taken from: https://github.com/nodejs/node/blob/ba684805b6c0eded76e5cd89ee00328ac7a59365/lib/internal/util.js#L125
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// Return undefined if there is no match.
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// Move the "slow cases" to a separate function to make sure this function gets
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// inlined properly. That prioritizes the common case.
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export function normalizeEncoding(enc: string | null): string | undefined {
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if (enc == null || enc === "utf8" || enc === "utf-8") return "utf8";
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return slowCases(enc);
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}
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// https://github.com/nodejs/node/blob/ba684805b6c0eded76e5cd89ee00328ac7a59365/lib/internal/util.js#L130
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function slowCases(enc: string): string | undefined {
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switch (enc.length) {
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case 4:
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if (enc === "UTF8") return "utf8";
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if (enc === "ucs2" || enc === "UCS2") return "utf16le";
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enc = `${enc}`.toLowerCase();
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if (enc === "utf8") return "utf8";
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if (enc === "ucs2") return "utf16le";
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break;
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case 3:
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if (enc === "hex" || enc === "HEX" || `${enc}`.toLowerCase() === "hex")
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return "hex";
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break;
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case 5:
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if (enc === "ascii") return "ascii";
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if (enc === "ucs-2") return "utf16le";
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if (enc === "UTF-8") return "utf8";
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if (enc === "ASCII") return "ascii";
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if (enc === "UCS-2") return "utf16le";
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enc = `${enc}`.toLowerCase();
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if (enc === "utf-8") return "utf8";
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if (enc === "ascii") return "ascii";
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if (enc === "ucs-2") return "utf16le";
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break;
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case 6:
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if (enc === "base64") return "base64";
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if (enc === "latin1" || enc === "binary") return "latin1";
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if (enc === "BASE64") return "base64";
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if (enc === "LATIN1" || enc === "BINARY") return "latin1";
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enc = `${enc}`.toLowerCase();
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if (enc === "base64") return "base64";
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if (enc === "latin1" || enc === "binary") return "latin1";
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break;
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case 7:
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if (
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enc === "utf16le" ||
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enc === "UTF16LE" ||
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`${enc}`.toLowerCase() === "utf16le"
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)
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return "utf16le";
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break;
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case 8:
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if (
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enc === "utf-16le" ||
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enc === "UTF-16LE" ||
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`${enc}`.toLowerCase() === "utf-16le"
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)
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return "utf16le";
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break;
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default:
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if (enc === "") return "utf8";
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}
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}
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