1 files changed, 87 insertions, 0 deletions
diff --git a/js/src/builtin/Number.js b/js/src/builtin/Number.js
new file mode 100644
index 000000000..07b2be57a
--- /dev/null
+++ b/js/src/builtin/Number.js
@@ -0,0 +1,87 @@
+/* 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/. */
+
+/*global intl_NumberFormat: false, */
+
+
+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.  Note that valueOf enforces "this Number value" restrictions.
+    var x = callFunction(std_Number_valueOf, 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 (numberFormatCache.numberFormat === undefined)
+            numberFormatCache.numberFormat = intl_NumberFormat(locales, options);
+        numberFormat = numberFormatCache.numberFormat;
+    } else {
+        numberFormat = intl_NumberFormat(locales, options);
+    }
+
+    // Step 5.
+    return intl_FormatNumber(numberFormat, x);
+}
+
+// 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;
+}
+
+// ES6 draft ES6 20.1.2.5
+function Number_isSafeInteger(number) {
+    // Step 1.
+    if (typeof number !== 'number')
+        return false;
+
+    // Step 2.
+    if (!Number_isFinite(number))
+        return false;
+
+    // Step 3.
+    var integer = ToInteger(number);
+
+    // Step 4.
+    if (integer !== number)
+        return false;
+
+    // Step 5. If abs(integer) <= 2**53 - 1, return true.
+    if (std_Math_abs(integer) <= 9007199254740991)
+        return true;
+
+    // Step 6.
+    return false;
+}
+
+function Global_isNaN(number) {
+    return Number_isNaN(ToNumber(number));
+}
+
+function Global_isFinite(number){
+    return Number_isFinite(ToNumber(number));
+}