JavaScriptCore-521.tar.gz

[apple/javascriptcore.git] / runtime / ArrayConstructor.cpp

diff --git a/runtime/ArrayConstructor.cpp b/runtime/ArrayConstructor.cpp
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+/*
+ *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2003, 2007, 2008 Apple Inc. All rights reserved.
+ *  Copyright (C) 2003 Peter Kelly (pmk@post.com)
+ *  Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ *  USA
+ *
+ */
+
+#include "config.h"
+#include "ArrayConstructor.h"
+
+#include "ArrayPrototype.h"
+#include "JSArray.h"
+#include "Lookup.h"
+
+namespace JSC {
+
+ASSERT_CLASS_FITS_IN_CELL(ArrayConstructor);
+
+ArrayConstructor::ArrayConstructor(ExecState* exec, PassRefPtr<Structure> structure, ArrayPrototype* arrayPrototype)
+    : InternalFunction(&exec->globalData(), structure, Identifier(exec, arrayPrototype->classInfo()->className))
+{
+    // ECMA 15.4.3.1 Array.prototype
+    putDirectWithoutTransition(exec->propertyNames().prototype, arrayPrototype, DontEnum | DontDelete | ReadOnly);
+
+    // no. of arguments for constructor
+    putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
+}
+
+static JSObject* constructArrayWithSizeQuirk(ExecState* exec, const ArgList& args)
+{
+    // a single numeric argument denotes the array size (!)
+    if (args.size() == 1 && args.at(exec, 0).isNumber()) {
+        uint32_t n = args.at(exec, 0).toUInt32(exec);
+        if (n != args.at(exec, 0).toNumber(exec))
+            return throwError(exec, RangeError, "Array size is not a small enough positive integer.");
+        return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), n);
+    }
+
+    // otherwise the array is constructed with the arguments in it
+    return new (exec) JSArray(exec, exec->lexicalGlobalObject()->arrayStructure(), args);
+}
+
+static JSObject* constructWithArrayConstructor(ExecState* exec, JSObject*, const ArgList& args)
+{
+    return constructArrayWithSizeQuirk(exec, args);
+}
+
+// ECMA 15.4.2
+ConstructType ArrayConstructor::getConstructData(ConstructData& constructData)
+{
+    constructData.native.function = constructWithArrayConstructor;
+    return ConstructTypeHost;
+}
+
+static JSValuePtr callArrayConstructor(ExecState* exec, JSObject*, JSValuePtr, const ArgList& args)
+{
+    return constructArrayWithSizeQuirk(exec, args);
+}
+
+// ECMA 15.6.1
+CallType ArrayConstructor::getCallData(CallData& callData)
+{
+    // equivalent to 'new Array(....)'
+    callData.native.function = callArrayConstructor;
+    return CallTypeHost;
+}
+
+} // namespace JSC