forked from mirrors/gecko-dev
115 lines
3.2 KiB
JavaScript
115 lines
3.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#if JS_HAS_INTL_API
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var numberFormatCache = new Record();
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/**
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* Format this Number object into a string, using the locale and formatting options
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* provided.
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*
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* Spec: ECMAScript Language Specification, 5.1 edition, 15.7.4.3.
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* Spec: ECMAScript Internationalization API Specification, 13.2.1.
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*/
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function Number_toLocaleString() {
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// Steps 1-2.
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var x = callFunction(ThisNumberValueForToLocaleString, this);
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// Steps 2-3.
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var locales = arguments.length > 0 ? arguments[0] : undefined;
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var options = arguments.length > 1 ? arguments[1] : undefined;
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// Step 4.
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var numberFormat;
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if (locales === undefined && options === undefined) {
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// This cache only optimizes for the old ES5 toLocaleString without
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// locales and options.
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if (!IsRuntimeDefaultLocale(numberFormatCache.runtimeDefaultLocale)) {
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numberFormatCache.numberFormat = intl_NumberFormat(locales, options);
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numberFormatCache.runtimeDefaultLocale = RuntimeDefaultLocale();
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}
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numberFormat = numberFormatCache.numberFormat;
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} else {
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numberFormat = intl_NumberFormat(locales, options);
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}
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// Step 5.
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return intl_FormatNumber(numberFormat, x, /* formatToParts = */ false, /* unitStyle = */ false);
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}
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#endif // JS_HAS_INTL_API
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// ES6 draft ES6 20.1.2.4
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function Number_isFinite(num) {
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if (typeof num !== "number")
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return false;
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return num - num === 0;
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}
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// ES6 draft ES6 20.1.2.2
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function Number_isNaN(num) {
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if (typeof num !== "number")
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return false;
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return num !== num;
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}
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// ES2018 draft rev f83aa38282c2a60c6916ebc410bfdf105a0f6a54
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// 20.1.2.3 Number.isInteger ( number )
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function Number_isInteger(number) {
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// Step 1.
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if (typeof number !== "number")
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return false;
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// -(2**31) is an int32, but abs(-(2**31)) isn't. Avoid bailouts below by
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// special casing it here.
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if (number === -(2 ** 31))
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return true;
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// Step 3.
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// Note: We're using abs + floor instead ceil to workaround bug 1379626.
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var absNumber = std_Math_abs(number);
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var integer = std_Math_floor(absNumber);
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// Steps 2, 4.
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if (absNumber - integer !== 0)
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return false;
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// Step 5.
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return true;
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}
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// ES2018 draft rev f83aa38282c2a60c6916ebc410bfdf105a0f6a54
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// 20.1.2.5 Number.isSafeInteger ( number )
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function Number_isSafeInteger(number) {
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// Step 1.
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if (typeof number !== "number")
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return false;
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// -(2**31) is an int32, but abs(-(2**31)) isn't. Avoid bailouts below by
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// special casing it here.
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if (number === -(2 ** 31))
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return true;
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// Step 3.
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var absNumber = std_Math_abs(number);
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var integer = std_Math_floor(absNumber);
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// Steps 2, 4.
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if (absNumber - integer !== 0)
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return false;
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// Step 5.
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if (integer <= (2 ** 53) - 1)
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return true;
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// Step 6.
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return false;
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}
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function Global_isNaN(number) {
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return Number_isNaN(ToNumber(number));
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}
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function Global_isFinite(number) {
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return Number_isFinite(ToNumber(number));
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}
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