JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / builtins / GlobalObject.js

diff --git a/builtins/GlobalObject.js b/builtins/GlobalObject.js
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+++ b/builtins/GlobalObject.js
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+/*
+ * Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+function toInteger(target)
+{
+    "use strict";
+
+    var numberValue = @Number(target);
+
+    // isNaN(numberValue)
+    if (numberValue !== numberValue)
+        return 0;
+
+    if (numberValue === 0 || !@isFinite(numberValue))
+        return numberValue;
+
+    return (numberValue > 0 ? 1 : -1) * @floor(@abs(numberValue));
+}
+
+function toLength(target)
+{
+    "use strict";
+
+    var maxSafeInteger = 0x1FFFFFFFFFFFFF;
+    var length = @toInteger(target);
+    // originally Math.min(Math.max(length, 0), maxSafeInteger));
+    return length > 0 ? (length < maxSafeInteger ? length : maxSafeInteger) : 0;
+}
+
+function isObject(object)
+{
+    "use strict";
+
+    return (object !== null && typeof object === "object") || typeof object === "function";
+}