/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#if JS_HAS_INTL_API
var numberFormatCache = new Record();

/**
 * Format this Number object into a string, using the locale and formatting options
 * provided.
 *
 * Spec: ECMAScript Language Specification, 5.1 edition, 15.7.4.3.
 * Spec: ECMAScript Internationalization API Specification, 13.2.1.
 */
function Number_toLocaleString() {
    // Steps 1-2.
    var x = callFunction(ThisNumberValueForToLocaleString, this);

    // Steps 2-3.
    var locales = arguments.length > 0 ? arguments[0] : undefined;
    var options = arguments.length > 1 ? arguments[1] : undefined;

    // Step 4.
    var numberFormat;
    if (locales === undefined && options === undefined) {
        // This cache only optimizes for the old ES5 toLocaleString without
        // locales and options.
        if (!IsRuntimeDefaultLocale(numberFormatCache.runtimeDefaultLocale)) {
            numberFormatCache.numberFormat = intl_NumberFormat(locales, options);
            numberFormatCache.runtimeDefaultLocale = RuntimeDefaultLocale();
        }
        numberFormat = numberFormatCache.numberFormat;
    } else {
        numberFormat = intl_NumberFormat(locales, options);
    }

    // Step 5.
    return intl_FormatNumber(numberFormat, x, /* formatToParts = */ false, /* unitStyle = */ false);
}
#endif  // JS_HAS_INTL_API

// ES6 draft ES6 20.1.2.4
function Number_isFinite(num) {
    if (typeof num !== "number")
        return false;
    return num - num === 0;
}

// ES6 draft ES6 20.1.2.2
function Number_isNaN(num) {
    if (typeof num !== "number")
        return false;
    return num !== num;
}

// ES2021 draft rev 889f2f30cf554b7ed812c0984626db1c8a4997c7
// 20.1.2.3 Number.isInteger ( number )
function Number_isInteger(number) {
    // Step 1. (Inlined call to IsIntegralNumber)

    // 7.2.6 IsIntegralNumber, step 1.
    if (typeof number !== "number")
        return false;

    var integer = std_Math_trunc(number);

    // 7.2.6 IsIntegralNumber, steps 2-4.
    // |number - integer| ensures Infinity correctly returns false, because
    // |Infinity - Infinity| yields NaN.
    return number - integer === 0;
}

// ES2021 draft rev 889f2f30cf554b7ed812c0984626db1c8a4997c7
// 20.1.2.5 Number.isSafeInteger ( number )
function Number_isSafeInteger(number) {
    // Step 1. (Inlined call to IsIntegralNumber)

    // 7.2.6 IsIntegralNumber, step 1.
    if (typeof number !== "number")
        return false;

    var integer = std_Math_trunc(number);

    // 7.2.6 IsIntegralNumber, steps 2-4.
    // |number - integer| to handle the Infinity case correctly.
    if (number - integer !== 0)
        return false;

    // Steps 1.a, 2.
    return -((2 ** 53) - 1) <= integer && integer <= (2 ** 53) - 1;
}

function Global_isNaN(number) {
    return Number_isNaN(ToNumber(number));
}

function Global_isFinite(number) {
    return Number_isFinite(ToNumber(number));
}