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401 lines
8.6 KiB
Plaintext
401 lines
8.6 KiB
Plaintext
import { Decimal } from "decimal.js";
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import { ZERO } from "./constants.js";
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import { invariant } from "./utils.js";
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/**
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* https://tc39.es/ecma262/#sec-tostring
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*/
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export function ToString(o) {
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// Only symbol is irregular...
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if (typeof o === "symbol") {
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throw TypeError("Cannot convert a Symbol value to a string");
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}
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return String(o);
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}
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/**
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* https://tc39.es/ecma262/#sec-tonumber
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* @param val
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*/
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export function ToNumber(arg) {
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if (typeof arg === "number") {
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return new Decimal(arg);
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}
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// Support bigint values by converting to string first
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// https://tc39.es/ecma402/#sec-intl.pluralrules.prototype.select
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if (typeof arg === "bigint") {
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return new Decimal(arg.toString());
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}
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invariant(typeof arg !== "symbol", "Symbol is not supported", TypeError);
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if (arg === undefined) {
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return new Decimal(NaN);
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}
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if (arg === null || arg === 0) {
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return ZERO;
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}
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if (arg === true) {
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return new Decimal(1);
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}
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if (typeof arg === "string") {
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try {
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return new Decimal(arg);
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} catch {
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return new Decimal(NaN);
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}
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}
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invariant(typeof arg === "object", "object expected", TypeError);
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let primValue = ToPrimitive(arg, "number");
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invariant(typeof primValue !== "object", "object expected", TypeError);
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return ToNumber(primValue);
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}
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/**
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* https://tc39.es/ecma262/#sec-tointeger
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* @param n
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*/
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function ToInteger(n) {
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const number = ToNumber(n);
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if (number.isNaN() || number.isZero()) {
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return ZERO;
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}
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if (number.isFinite()) {
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return number;
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}
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let integer = number.abs().floor();
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if (number.isNegative()) {
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integer = integer.negated();
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}
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return integer;
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}
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/**
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* https://tc39.es/ecma262/#sec-timeclip
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* @param time
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*/
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export function TimeClip(time) {
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if (!time.isFinite()) {
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return new Decimal(NaN);
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}
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if (time.abs().greaterThan(8.64 * 0x38d7ea4c68000)) {
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return new Decimal(NaN);
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}
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return ToInteger(time);
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}
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/**
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* https://tc39.es/ecma262/#sec-toobject
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* @param arg
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*/
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export function ToObject(arg) {
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if (arg == null) {
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throw new TypeError("undefined/null cannot be converted to object");
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}
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return Object(arg);
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}
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/**
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* https://www.ecma-international.org/ecma-262/11.0/index.html#sec-samevalue
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* @param x
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* @param y
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*/
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export function SameValue(x, y) {
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if (Object.is) {
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return Object.is(x, y);
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}
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// SameValue algorithm
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if (x === y) {
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// Steps 1-5, 7-10
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// Steps 6.b-6.e: +0 != -0
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return x !== 0 || 1 / x === 1 / y;
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}
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// Step 6.a: NaN == NaN
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return x !== x && y !== y;
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}
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/**
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* https://www.ecma-international.org/ecma-262/11.0/index.html#sec-arraycreate
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* @param len
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*/
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export function ArrayCreate(len) {
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return Array.from({ length: len });
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}
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/**
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* https://www.ecma-international.org/ecma-262/11.0/index.html#sec-hasownproperty
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* @param o
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* @param prop
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*/
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export function HasOwnProperty(o, prop) {
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return Object.prototype.hasOwnProperty.call(o, prop);
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}
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/**
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* https://www.ecma-international.org/ecma-262/11.0/index.html#sec-type
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* @param x
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*/
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export function Type(x) {
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if (x === null) {
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return "Null";
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}
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if (typeof x === "undefined") {
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return "Undefined";
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}
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if (typeof x === "function" || typeof x === "object") {
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return "Object";
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}
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if (typeof x === "number") {
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return "Number";
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}
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if (typeof x === "boolean") {
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return "Boolean";
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}
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if (typeof x === "string") {
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return "String";
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}
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if (typeof x === "symbol") {
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return "Symbol";
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}
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if (typeof x === "bigint") {
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return "BigInt";
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}
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}
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const MS_PER_DAY = 864e5;
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/**
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* https://www.ecma-international.org/ecma-262/11.0/index.html#eqn-modulo
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* @param x
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* @param y
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* @return k of the same sign as y
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*/
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function mod(x, y) {
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return x - Math.floor(x / y) * y;
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}
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/**
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* https://tc39.es/ecma262/#eqn-Day
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* @param t
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*/
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export function Day(t) {
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return Math.floor(t / MS_PER_DAY);
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}
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/**
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* https://tc39.es/ecma262/#sec-week-day
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* @param t
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*/
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export function WeekDay(t) {
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return mod(Day(t) + 4, 7);
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}
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/**
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* https://tc39.es/ecma262/#sec-year-number
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* @param y
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*/
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export function DayFromYear(y) {
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if (y < 100) {
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// Date.UTC parses 0 - 99 as 1900 - 1999
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const date = new Date(0);
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date.setUTCFullYear(y, 0, 1);
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date.setUTCHours(0, 0, 0, 0);
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return date.getTime() / MS_PER_DAY;
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}
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return Date.UTC(y, 0) / MS_PER_DAY;
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}
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/**
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* https://tc39.es/ecma262/#sec-year-number
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* @param y
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*/
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export function TimeFromYear(y) {
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return Date.UTC(y, 0);
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}
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/**
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* https://tc39.es/ecma262/#sec-year-number
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* @param t
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*/
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export function YearFromTime(t) {
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return new Date(t).getUTCFullYear();
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}
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export function DaysInYear(y) {
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if (y % 4 !== 0) {
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return 365;
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}
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if (y % 100 !== 0) {
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return 366;
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}
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if (y % 400 !== 0) {
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return 365;
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}
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return 366;
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}
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export function DayWithinYear(t) {
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return Day(t) - DayFromYear(YearFromTime(t));
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}
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export function InLeapYear(t) {
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return DaysInYear(YearFromTime(t)) === 365 ? 0 : 1;
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}
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/**
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* https://tc39.es/ecma262/#sec-month-number
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* @param t
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*/
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export function MonthFromTime(t) {
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const dwy = DayWithinYear(t);
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const leap = InLeapYear(t);
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if (dwy >= 0 && dwy < 31) {
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return 0;
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}
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if (dwy < 59 + leap) {
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return 1;
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}
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if (dwy < 90 + leap) {
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return 2;
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}
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if (dwy < 120 + leap) {
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return 3;
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}
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if (dwy < 151 + leap) {
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return 4;
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}
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if (dwy < 181 + leap) {
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return 5;
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}
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if (dwy < 212 + leap) {
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return 6;
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}
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if (dwy < 243 + leap) {
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return 7;
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}
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if (dwy < 273 + leap) {
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return 8;
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}
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if (dwy < 304 + leap) {
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return 9;
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}
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if (dwy < 334 + leap) {
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return 10;
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}
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if (dwy < 365 + leap) {
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return 11;
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}
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throw new Error("Invalid time");
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}
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export function DateFromTime(t) {
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const dwy = DayWithinYear(t);
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const mft = MonthFromTime(t);
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const leap = InLeapYear(t);
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if (mft === 0) {
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return dwy + 1;
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}
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if (mft === 1) {
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return dwy - 30;
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}
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if (mft === 2) {
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return dwy - 58 - leap;
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}
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if (mft === 3) {
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return dwy - 89 - leap;
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}
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if (mft === 4) {
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return dwy - 119 - leap;
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}
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if (mft === 5) {
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return dwy - 150 - leap;
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}
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if (mft === 6) {
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return dwy - 180 - leap;
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}
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if (mft === 7) {
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return dwy - 211 - leap;
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}
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if (mft === 8) {
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return dwy - 242 - leap;
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}
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if (mft === 9) {
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return dwy - 272 - leap;
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}
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if (mft === 10) {
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return dwy - 303 - leap;
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}
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if (mft === 11) {
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return dwy - 333 - leap;
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}
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throw new Error("Invalid time");
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}
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const HOURS_PER_DAY = 24;
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const MINUTES_PER_HOUR = 60;
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const SECONDS_PER_MINUTE = 60;
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const MS_PER_SECOND = 1e3;
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const MS_PER_MINUTE = MS_PER_SECOND * SECONDS_PER_MINUTE;
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const MS_PER_HOUR = MS_PER_MINUTE * MINUTES_PER_HOUR;
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export function HourFromTime(t) {
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return mod(Math.floor(t / MS_PER_HOUR), HOURS_PER_DAY);
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}
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export function MinFromTime(t) {
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return mod(Math.floor(t / MS_PER_MINUTE), MINUTES_PER_HOUR);
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}
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export function SecFromTime(t) {
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return mod(Math.floor(t / MS_PER_SECOND), SECONDS_PER_MINUTE);
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}
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function IsCallable(fn) {
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return typeof fn === "function";
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}
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/**
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* The abstract operation OrdinaryHasInstance implements
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* the default algorithm for determining if an object O
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* inherits from the instance object inheritance path
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* provided by constructor C.
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* @param C class
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* @param O object
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* @param internalSlots internalSlots
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*/
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export function OrdinaryHasInstance(C, O, internalSlots) {
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if (!IsCallable(C)) {
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return false;
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}
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if (internalSlots?.boundTargetFunction) {
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let BC = internalSlots?.boundTargetFunction;
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return O instanceof BC;
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}
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if (typeof O !== "object") {
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return false;
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}
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let P = C.prototype;
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if (typeof P !== "object") {
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throw new TypeError("OrdinaryHasInstance called on an object with an invalid prototype property.");
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}
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return Object.prototype.isPrototypeOf.call(P, O);
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}
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export function msFromTime(t) {
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return mod(t, MS_PER_SECOND);
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}
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function OrdinaryToPrimitive(O, hint) {
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let methodNames;
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if (hint === "string") {
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methodNames = ["toString", "valueOf"];
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} else {
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methodNames = ["valueOf", "toString"];
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}
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for (const name of methodNames) {
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const method = O[name];
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if (IsCallable(method)) {
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let result = method.call(O);
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if (typeof result !== "object") {
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return result;
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}
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}
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}
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throw new TypeError("Cannot convert object to primitive value");
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}
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export function ToPrimitive(input, preferredType) {
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if (typeof input === "object" && input != null) {
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const exoticToPrim = Symbol.toPrimitive in input ? input[Symbol.toPrimitive] : undefined;
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let hint;
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if (exoticToPrim !== undefined) {
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if (preferredType === undefined) {
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hint = "default";
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} else if (preferredType === "string") {
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hint = "string";
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} else {
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invariant(preferredType === "number", "preferredType must be \"string\" or \"number\"");
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hint = "number";
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}
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let result = exoticToPrim.call(input, hint);
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if (typeof result !== "object") {
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return result;
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}
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throw new TypeError("Cannot convert exotic object to primitive.");
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}
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if (preferredType === undefined) {
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preferredType = "number";
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}
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return OrdinaryToPrimitive(input, preferredType);
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}
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return input;
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}
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