--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/runtime/ObjectConstructor.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,320 @@
+/*
+ * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
+ *
+ * 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 "ObjectConstructor.h"
+
+#include "Error.h"
+#include "ExceptionHelpers.h"
+#include "JSFunction.h"
+#include "JSArray.h"
+#include "JSGlobalObject.h"
+#include "ObjectPrototype.h"
+#include "PropertyDescriptor.h"
+#include "PropertyNameArray.h"
+#include "PrototypeFunction.h"
+
+namespace JSC {
+
+ASSERT_CLASS_FITS_IN_CELL(ObjectConstructor);
+
+static EncodedJSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorKeys(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperty(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperties(ExecState*);
+static EncodedJSValue JSC_HOST_CALL objectConstructorCreate(ExecState*);
+
+ObjectConstructor::ObjectConstructor(ExecState* exec, JSGlobalObject* globalObject, NonNullPassRefPtr<Structure> structure, ObjectPrototype* objectPrototype, Structure* prototypeFunctionStructure)
+: InternalFunction(&exec->globalData(), globalObject, structure, Identifier(exec, "Object"))
+{
+ // ECMA 15.2.3.1
+ putDirectWithoutTransition(exec->propertyNames().prototype, objectPrototype, DontEnum | DontDelete | ReadOnly);
+
+ // no. of arguments for constructor
+ putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
+
+ putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 1, exec->propertyNames().getPrototypeOf, objectConstructorGetPrototypeOf), DontEnum);
+ putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 2, exec->propertyNames().getOwnPropertyDescriptor, objectConstructorGetOwnPropertyDescriptor), DontEnum);
+ putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 1, exec->propertyNames().getOwnPropertyNames, objectConstructorGetOwnPropertyNames), DontEnum);
+ putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 1, exec->propertyNames().keys, objectConstructorKeys), DontEnum);
+ putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 3, exec->propertyNames().defineProperty, objectConstructorDefineProperty), DontEnum);
+ putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 2, exec->propertyNames().defineProperties, objectConstructorDefineProperties), DontEnum);
+ putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, globalObject, prototypeFunctionStructure, 2, exec->propertyNames().create, objectConstructorCreate), DontEnum);
+}
+
+// ECMA 15.2.2
+static ALWAYS_INLINE JSObject* constructObject(ExecState* exec, const ArgList& args)
+{
+ JSValue arg = args.at(0);
+ if (arg.isUndefinedOrNull())
+ return new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure());
+ return arg.toObject(exec);
+}
+
+static EncodedJSValue JSC_HOST_CALL constructWithObjectConstructor(ExecState* exec)
+{
+ ArgList args(exec);
+ return JSValue::encode(constructObject(exec, args));
+}
+
+ConstructType ObjectConstructor::getConstructData(ConstructData& constructData)
+{
+ constructData.native.function = constructWithObjectConstructor;
+ return ConstructTypeHost;
+}
+
+static EncodedJSValue JSC_HOST_CALL callObjectConstructor(ExecState* exec)
+{
+ ArgList args(exec);
+ return JSValue::encode(constructObject(exec, args));
+}
+
+CallType ObjectConstructor::getCallData(CallData& callData)
+{
+ callData.native.function = callObjectConstructor;
+ return CallTypeHost;
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, "Requested prototype of a value that is not an object."));
+ return JSValue::encode(asObject(exec->argument(0))->prototype());
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, "Requested property descriptor of a value that is not an object."));
+ UString propertyName = exec->argument(1).toString(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ JSObject* object = asObject(exec->argument(0));
+ PropertyDescriptor descriptor;
+ if (!object->getOwnPropertyDescriptor(exec, Identifier(exec, propertyName), descriptor))
+ return JSValue::encode(jsUndefined());
+ if (exec->hadException())
+ return JSValue::encode(jsUndefined());
+
+ JSObject* description = constructEmptyObject(exec);
+ if (!descriptor.isAccessorDescriptor()) {
+ description->putDirect(exec->propertyNames().value, descriptor.value() ? descriptor.value() : jsUndefined(), 0);
+ description->putDirect(exec->propertyNames().writable, jsBoolean(descriptor.writable()), 0);
+ } else {
+ description->putDirect(exec->propertyNames().get, descriptor.getter() ? descriptor.getter() : jsUndefined(), 0);
+ description->putDirect(exec->propertyNames().set, descriptor.setter() ? descriptor.setter() : jsUndefined(), 0);
+ }
+
+ description->putDirect(exec->propertyNames().enumerable, jsBoolean(descriptor.enumerable()), 0);
+ description->putDirect(exec->propertyNames().configurable, jsBoolean(descriptor.configurable()), 0);
+
+ return JSValue::encode(description);
+}
+
+// FIXME: Use the enumeration cache.
+EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, "Requested property names of a value that is not an object."));
+ PropertyNameArray properties(exec);
+ asObject(exec->argument(0))->getOwnPropertyNames(exec, properties, IncludeDontEnumProperties);
+ JSArray* names = constructEmptyArray(exec);
+ size_t numProperties = properties.size();
+ for (size_t i = 0; i < numProperties; i++)
+ names->push(exec, jsOwnedString(exec, properties[i].ustring()));
+ return JSValue::encode(names);
+}
+
+// FIXME: Use the enumeration cache.
+EncodedJSValue JSC_HOST_CALL objectConstructorKeys(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, "Requested keys of a value that is not an object."));
+ PropertyNameArray properties(exec);
+ asObject(exec->argument(0))->getOwnPropertyNames(exec, properties);
+ JSArray* keys = constructEmptyArray(exec);
+ size_t numProperties = properties.size();
+ for (size_t i = 0; i < numProperties; i++)
+ keys->push(exec, jsOwnedString(exec, properties[i].ustring()));
+ return JSValue::encode(keys);
+}
+
+// ES5 8.10.5 ToPropertyDescriptor
+static bool toPropertyDescriptor(ExecState* exec, JSValue in, PropertyDescriptor& desc)
+{
+ if (!in.isObject()) {
+ throwError(exec, createTypeError(exec, "Property description must be an object."));
+ return false;
+ }
+ JSObject* description = asObject(in);
+
+ PropertySlot enumerableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().enumerable, enumerableSlot)) {
+ desc.setEnumerable(enumerableSlot.getValue(exec, exec->propertyNames().enumerable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot configurableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().configurable, configurableSlot)) {
+ desc.setConfigurable(configurableSlot.getValue(exec, exec->propertyNames().configurable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ JSValue value;
+ PropertySlot valueSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().value, valueSlot)) {
+ desc.setValue(valueSlot.getValue(exec, exec->propertyNames().value));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot writableSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().writable, writableSlot)) {
+ desc.setWritable(writableSlot.getValue(exec, exec->propertyNames().writable).toBoolean(exec));
+ if (exec->hadException())
+ return false;
+ }
+
+ PropertySlot getSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().get, getSlot)) {
+ JSValue get = getSlot.getValue(exec, exec->propertyNames().get);
+ if (exec->hadException())
+ return false;
+ if (!get.isUndefined()) {
+ CallData callData;
+ if (getCallData(get, callData) == CallTypeNone) {
+ throwError(exec, createTypeError(exec, "Getter must be a function."));
+ return false;
+ }
+ } else
+ get = JSValue();
+ desc.setGetter(get);
+ }
+
+ PropertySlot setSlot(description);
+ if (description->getPropertySlot(exec, exec->propertyNames().set, setSlot)) {
+ JSValue set = setSlot.getValue(exec, exec->propertyNames().set);
+ if (exec->hadException())
+ return false;
+ if (!set.isUndefined()) {
+ CallData callData;
+ if (getCallData(set, callData) == CallTypeNone) {
+ throwError(exec, createTypeError(exec, "Setter must be a function."));
+ return false;
+ }
+ } else
+ set = JSValue();
+
+ desc.setSetter(set);
+ }
+
+ if (!desc.isAccessorDescriptor())
+ return true;
+
+ if (desc.value()) {
+ throwError(exec, createTypeError(exec, "Invalid property. 'value' present on property with getter or setter."));
+ return false;
+ }
+
+ if (desc.writablePresent()) {
+ throwError(exec, createTypeError(exec, "Invalid property. 'writable' present on property with getter or setter."));
+ return false;
+ }
+ return true;
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperty(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, "Properties can only be defined on Objects."));
+ JSObject* O = asObject(exec->argument(0));
+ UString propertyName = exec->argument(1).toString(exec);
+ if (exec->hadException())
+ return JSValue::encode(jsNull());
+ PropertyDescriptor descriptor;
+ if (!toPropertyDescriptor(exec, exec->argument(2), descriptor))
+ return JSValue::encode(jsNull());
+ ASSERT((descriptor.attributes() & (Getter | Setter)) || (!descriptor.isAccessorDescriptor()));
+ ASSERT(!exec->hadException());
+ O->defineOwnProperty(exec, Identifier(exec, propertyName), descriptor, true);
+ return JSValue::encode(O);
+}
+
+static JSValue defineProperties(ExecState* exec, JSObject* object, JSObject* properties)
+{
+ PropertyNameArray propertyNames(exec);
+ asObject(properties)->getOwnPropertyNames(exec, propertyNames);
+ size_t numProperties = propertyNames.size();
+ Vector<PropertyDescriptor> descriptors;
+ MarkedArgumentBuffer markBuffer;
+ for (size_t i = 0; i < numProperties; i++) {
+ PropertySlot slot;
+ JSValue prop = properties->get(exec, propertyNames[i]);
+ if (exec->hadException())
+ return jsNull();
+ PropertyDescriptor descriptor;
+ if (!toPropertyDescriptor(exec, prop, descriptor))
+ return jsNull();
+ descriptors.append(descriptor);
+ // Ensure we mark all the values that we're accumulating
+ if (descriptor.isDataDescriptor() && descriptor.value())
+ markBuffer.append(descriptor.value());
+ if (descriptor.isAccessorDescriptor()) {
+ if (descriptor.getter())
+ markBuffer.append(descriptor.getter());
+ if (descriptor.setter())
+ markBuffer.append(descriptor.setter());
+ }
+ }
+ for (size_t i = 0; i < numProperties; i++) {
+ object->defineOwnProperty(exec, propertyNames[i], descriptors[i], true);
+ if (exec->hadException())
+ return jsNull();
+ }
+ return object;
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorDefineProperties(ExecState* exec)
+{
+ if (!exec->argument(0).isObject())
+ return throwVMError(exec, createTypeError(exec, "Properties can only be defined on Objects."));
+ if (!exec->argument(1).isObject())
+ return throwVMError(exec, createTypeError(exec, "Property descriptor list must be an Object."));
+ return JSValue::encode(defineProperties(exec, asObject(exec->argument(0)), asObject(exec->argument(1))));
+}
+
+EncodedJSValue JSC_HOST_CALL objectConstructorCreate(ExecState* exec)
+{
+ if (!exec->argument(0).isObject() && !exec->argument(0).isNull())
+ return throwVMError(exec, createTypeError(exec, "Object prototype may only be an Object or null."));
+ JSObject* newObject = constructEmptyObject(exec);
+ newObject->setPrototype(exec->argument(0));
+ if (exec->argument(1).isUndefined())
+ return JSValue::encode(newObject);
+ if (!exec->argument(1).isObject())
+ return throwVMError(exec, createTypeError(exec, "Property descriptor list must be an Object."));
+ return JSValue::encode(defineProperties(exec, newObject, asObject(exec->argument(1))));
+}
+
+} // namespace JSC