webkitgtk-2.10.2webkitgtk-2.10.2

1 files changed, 131 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/ArrayConstructor.cpp b/Source/JavaScriptCore/runtime/ArrayConstructor.cpp
new file mode 100644
index 000000000..194f9217c
--- /dev/null
+++ b/Source/JavaScriptCore/runtime/ArrayConstructor.cpp
@@ -0,0 +1,131 @@
+/*
+ *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2003, 2007, 2008, 2011 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 "ButterflyInlines.h"
+#include "CopiedSpaceInlines.h"
+#include "Error.h"
+#include "ExceptionHelpers.h"
+#include "JSArray.h"
+#include "JSFunction.h"
+#include "Lookup.h"
+#include "JSCInlines.h"
+
+namespace JSC {
+
+static EncodedJSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState*);
+
+}
+
+#include "ArrayConstructor.lut.h"
+
+namespace JSC {
+
+STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(ArrayConstructor);
+
+const ClassInfo ArrayConstructor::s_info = { "Function", &InternalFunction::s_info, &arrayConstructorTable, CREATE_METHOD_TABLE(ArrayConstructor) };
+
+/* Source for ArrayConstructor.lut.h
+@begin arrayConstructorTable
+  isArray   arrayConstructorIsArray     DontEnum|Function 1
+  of        arrayConstructorOf          DontEnum|Function 0
+  from      arrayConstructorFrom        DontEnum|Function 0
+@end
+*/
+
+ArrayConstructor::ArrayConstructor(VM& vm, Structure* structure)
+    : InternalFunction(vm, structure)
+{
+}
+
+void ArrayConstructor::finishCreation(VM& vm, ArrayPrototype* arrayPrototype)
+{
+    Base::finishCreation(vm, arrayPrototype->classInfo()->className);
+    putDirectWithoutTransition(vm, vm.propertyNames->prototype, arrayPrototype, DontEnum | DontDelete | ReadOnly);
+    putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
+}
+
+bool ArrayConstructor::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot &slot)
+{
+    return getStaticFunctionSlot<InternalFunction>(exec, arrayConstructorTable, jsCast<ArrayConstructor*>(object), propertyName, slot);
+}
+
+// ------------------------------ Functions ---------------------------
+
+JSObject* constructArrayWithSizeQuirk(ExecState* exec, ArrayAllocationProfile* profile, JSGlobalObject* globalObject, JSValue length)
+{
+    if (!length.isNumber())
+        return constructArrayNegativeIndexed(exec, profile, globalObject, &length, 1);
+    
+    uint32_t n = length.toUInt32(exec);
+    if (n != length.toNumber(exec))
+        return exec->vm().throwException(exec, createRangeError(exec, ASCIILiteral("Array size is not a small enough positive integer.")));
+    return constructEmptyArray(exec, profile, globalObject, n);
+}
+
+static inline JSObject* constructArrayWithSizeQuirk(ExecState* exec, const ArgList& args)
+{
+    JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject();
+
+    // a single numeric argument denotes the array size (!)
+    if (args.size() == 1)
+        return constructArrayWithSizeQuirk(exec, 0, globalObject, args.at(0));
+
+    // otherwise the array is constructed with the arguments in it
+    return constructArray(exec, 0, globalObject, args);
+}
+
+static EncodedJSValue JSC_HOST_CALL constructWithArrayConstructor(ExecState* exec)
+{
+    ArgList args(exec);
+    return JSValue::encode(constructArrayWithSizeQuirk(exec, args));
+}
+
+ConstructType ArrayConstructor::getConstructData(JSCell*, ConstructData& constructData)
+{
+    constructData.native.function = constructWithArrayConstructor;
+    return ConstructTypeHost;
+}
+
+static EncodedJSValue JSC_HOST_CALL callArrayConstructor(ExecState* exec)
+{
+    ArgList args(exec);
+    return JSValue::encode(constructArrayWithSizeQuirk(exec, args));
+}
+
+CallType ArrayConstructor::getCallData(JSCell*, CallData& callData)
+{
+    // equivalent to 'new Array(....)'
+    callData.native.function = callArrayConstructor;
+    return CallTypeHost;
+}
+
+EncodedJSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState* exec)
+{
+    return JSValue::encode(jsBoolean(exec->argument(0).inherits(JSArray::info())));
+}
+
+} // namespace JSC