--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/API/JSCallbackObjectFunctions.h Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,607 @@
+/*
+ * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
+ *
+ * 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 COMPUTER, 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 COMPUTER, 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.
+ */
+
+#include "APIShims.h"
+#include "APICast.h"
+#include "Error.h"
+#include "ExceptionHelpers.h"
+#include "JSCallbackFunction.h"
+#include "JSClassRef.h"
+#include "JSFunction.h"
+#include "JSGlobalObject.h"
+#include "JSLock.h"
+#include "JSObjectRef.h"
+#include "JSString.h"
+#include "JSStringRef.h"
+#include "OpaqueJSString.h"
+#include "PropertyNameArray.h"
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+template <class Base>
+inline JSCallbackObject<Base>* JSCallbackObject<Base>::asCallbackObject(JSValue value)
+{
+ ASSERT(asObject(value)->inherits(&info));
+ return static_cast<JSCallbackObject*>(asObject(value));
+}
+
+template <class Base>
+JSCallbackObject<Base>::JSCallbackObject(ExecState* exec, JSGlobalObject* globalObject, NonNullPassRefPtr<Structure> structure, JSClassRef jsClass, void* data)
+ : Base(globalObject, structure)
+ , m_callbackObjectData(adoptPtr(new JSCallbackObjectData(data, jsClass)))
+{
+ init(exec);
+}
+
+// Global object constructor.
+// FIXME: Move this into a separate JSGlobalCallbackObject class derived from this one.
+template <class Base>
+JSCallbackObject<Base>::JSCallbackObject(JSClassRef jsClass, NonNullPassRefPtr<Structure> structure)
+ : Base(structure)
+ , m_callbackObjectData(adoptPtr(new JSCallbackObjectData(0, jsClass)))
+{
+ ASSERT(Base::isGlobalObject());
+ init(static_cast<JSGlobalObject*>(this)->globalExec());
+}
+
+template <class Base>
+void JSCallbackObject<Base>::init(ExecState* exec)
+{
+ ASSERT(exec);
+
+ Vector<JSObjectInitializeCallback, 16> initRoutines;
+ JSClassRef jsClass = classRef();
+ do {
+ if (JSObjectInitializeCallback initialize = jsClass->initialize)
+ initRoutines.append(initialize);
+ } while ((jsClass = jsClass->parentClass));
+
+ // initialize from base to derived
+ for (int i = static_cast<int>(initRoutines.size()) - 1; i >= 0; i--) {
+ APICallbackShim callbackShim(exec);
+ JSObjectInitializeCallback initialize = initRoutines[i];
+ initialize(toRef(exec), toRef(this));
+ }
+}
+
+template <class Base>
+JSCallbackObject<Base>::~JSCallbackObject()
+{
+ JSObjectRef thisRef = toRef(this);
+
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
+ if (JSObjectFinalizeCallback finalize = jsClass->finalize)
+ finalize(thisRef);
+}
+
+template <class Base>
+UString JSCallbackObject<Base>::className() const
+{
+ UString thisClassName = classRef()->className();
+ if (!thisClassName.isEmpty())
+ return thisClassName;
+
+ return Base::className();
+}
+
+template <class Base>
+bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
+{
+ JSContextRef ctx = toRef(exec);
+ JSObjectRef thisRef = toRef(this);
+ RefPtr<OpaqueJSString> propertyNameRef;
+
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+ // optional optimization to bypass getProperty in cases when we only need to know if the property exists
+ if (JSObjectHasPropertyCallback hasProperty = jsClass->hasProperty) {
+ if (!propertyNameRef)
+ propertyNameRef = OpaqueJSString::create(propertyName.ustring());
+ APICallbackShim callbackShim(exec);
+ if (hasProperty(ctx, thisRef, propertyNameRef.get())) {
+ slot.setCustom(this, callbackGetter);
+ return true;
+ }
+ } else if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
+ if (!propertyNameRef)
+ propertyNameRef = OpaqueJSString::create(propertyName.ustring());
+ JSValueRef exception = 0;
+ JSValueRef value;
+ {
+ APICallbackShim callbackShim(exec);
+ value = getProperty(ctx, thisRef, propertyNameRef.get(), &exception);
+ }
+ if (exception) {
+ throwError(exec, toJS(exec, exception));
+ slot.setValue(jsUndefined());
+ return true;
+ }
+ if (value) {
+ slot.setValue(toJS(exec, value));
+ return true;
+ }
+ }
+
+ if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+ if (staticValues->contains(propertyName.ustring().rep())) {
+ slot.setCustom(this, staticValueGetter);
+ return true;
+ }
+ }
+
+ if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+ if (staticFunctions->contains(propertyName.ustring().rep())) {
+ slot.setCustom(this, staticFunctionGetter);
+ return true;
+ }
+ }
+ }
+
+ return Base::getOwnPropertySlot(exec, propertyName, slot);
+}
+
+template <class Base>
+bool JSCallbackObject<Base>::getOwnPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
+{
+ return getOwnPropertySlot(exec, Identifier::from(exec, propertyName), slot);
+}
+
+template <class Base>
+bool JSCallbackObject<Base>::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
+{
+ PropertySlot slot;
+ if (getOwnPropertySlot(exec, propertyName, slot)) {
+ // Ideally we should return an access descriptor, but returning a value descriptor is better than nothing.
+ JSValue value = slot.getValue(exec, propertyName);
+ if (!exec->hadException())
+ descriptor.setValue(value);
+ // We don't know whether the property is configurable, but assume it is.
+ descriptor.setConfigurable(true);
+ // We don't know whether the property is enumerable (we could call getOwnPropertyNames() to find out), but assume it isn't.
+ descriptor.setEnumerable(false);
+ return true;
+ }
+
+ return Base::getOwnPropertyDescriptor(exec, propertyName, descriptor);
+}
+
+template <class Base>
+void JSCallbackObject<Base>::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
+{
+ JSContextRef ctx = toRef(exec);
+ JSObjectRef thisRef = toRef(this);
+ RefPtr<OpaqueJSString> propertyNameRef;
+ JSValueRef valueRef = toRef(exec, value);
+
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
+ if (!propertyNameRef)
+ propertyNameRef = OpaqueJSString::create(propertyName.ustring());
+ JSValueRef exception = 0;
+ bool result;
+ {
+ APICallbackShim callbackShim(exec);
+ result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
+ }
+ if (exception)
+ throwError(exec, toJS(exec, exception));
+ if (result || exception)
+ return;
+ }
+
+ if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+ if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep())) {
+ if (entry->attributes & kJSPropertyAttributeReadOnly)
+ return;
+ if (JSObjectSetPropertyCallback setProperty = entry->setProperty) {
+ if (!propertyNameRef)
+ propertyNameRef = OpaqueJSString::create(propertyName.ustring());
+ JSValueRef exception = 0;
+ bool result;
+ {
+ APICallbackShim callbackShim(exec);
+ result = setProperty(ctx, thisRef, propertyNameRef.get(), valueRef, &exception);
+ }
+ if (exception)
+ throwError(exec, toJS(exec, exception));
+ if (result || exception)
+ return;
+ } else
+ throwError(exec, createReferenceError(exec, "Attempt to set a property that is not settable."));
+ }
+ }
+
+ if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+ if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
+ if (entry->attributes & kJSPropertyAttributeReadOnly)
+ return;
+ JSCallbackObject<Base>::putDirect(propertyName, value); // put as override property
+ return;
+ }
+ }
+ }
+
+ return Base::put(exec, propertyName, value, slot);
+}
+
+template <class Base>
+bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, const Identifier& propertyName)
+{
+ JSContextRef ctx = toRef(exec);
+ JSObjectRef thisRef = toRef(this);
+ RefPtr<OpaqueJSString> propertyNameRef;
+
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (JSObjectDeletePropertyCallback deleteProperty = jsClass->deleteProperty) {
+ if (!propertyNameRef)
+ propertyNameRef = OpaqueJSString::create(propertyName.ustring());
+ JSValueRef exception = 0;
+ bool result;
+ {
+ APICallbackShim callbackShim(exec);
+ result = deleteProperty(ctx, thisRef, propertyNameRef.get(), &exception);
+ }
+ if (exception)
+ throwError(exec, toJS(exec, exception));
+ if (result || exception)
+ return true;
+ }
+
+ if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+ if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep())) {
+ if (entry->attributes & kJSPropertyAttributeDontDelete)
+ return false;
+ return true;
+ }
+ }
+
+ if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+ if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
+ if (entry->attributes & kJSPropertyAttributeDontDelete)
+ return false;
+ return true;
+ }
+ }
+ }
+
+ return Base::deleteProperty(exec, propertyName);
+}
+
+template <class Base>
+bool JSCallbackObject<Base>::deleteProperty(ExecState* exec, unsigned propertyName)
+{
+ return deleteProperty(exec, Identifier::from(exec, propertyName));
+}
+
+template <class Base>
+ConstructType JSCallbackObject<Base>::getConstructData(ConstructData& constructData)
+{
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (jsClass->callAsConstructor) {
+ constructData.native.function = construct;
+ return ConstructTypeHost;
+ }
+ }
+ return ConstructTypeNone;
+}
+
+template <class Base>
+EncodedJSValue JSCallbackObject<Base>::construct(ExecState* exec)
+{
+ JSObject* constructor = exec->callee();
+ JSContextRef execRef = toRef(exec);
+ JSObjectRef constructorRef = toRef(constructor);
+
+ for (JSClassRef jsClass = static_cast<JSCallbackObject<Base>*>(constructor)->classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (JSObjectCallAsConstructorCallback callAsConstructor = jsClass->callAsConstructor) {
+ int argumentCount = static_cast<int>(exec->argumentCount());
+ Vector<JSValueRef, 16> arguments(argumentCount);
+ for (int i = 0; i < argumentCount; i++)
+ arguments[i] = toRef(exec, exec->argument(i));
+ JSValueRef exception = 0;
+ JSObject* result;
+ {
+ APICallbackShim callbackShim(exec);
+ result = toJS(callAsConstructor(execRef, constructorRef, argumentCount, arguments.data(), &exception));
+ }
+ if (exception)
+ throwError(exec, toJS(exec, exception));
+ return JSValue::encode(result);
+ }
+ }
+
+ ASSERT_NOT_REACHED(); // getConstructData should prevent us from reaching here
+ return JSValue::encode(JSValue());
+}
+
+template <class Base>
+bool JSCallbackObject<Base>::hasInstance(ExecState* exec, JSValue value, JSValue)
+{
+ JSContextRef execRef = toRef(exec);
+ JSObjectRef thisRef = toRef(this);
+
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (JSObjectHasInstanceCallback hasInstance = jsClass->hasInstance) {
+ JSValueRef valueRef = toRef(exec, value);
+ JSValueRef exception = 0;
+ bool result;
+ {
+ APICallbackShim callbackShim(exec);
+ result = hasInstance(execRef, thisRef, valueRef, &exception);
+ }
+ if (exception)
+ throwError(exec, toJS(exec, exception));
+ return result;
+ }
+ }
+ return false;
+}
+
+template <class Base>
+CallType JSCallbackObject<Base>::getCallData(CallData& callData)
+{
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (jsClass->callAsFunction) {
+ callData.native.function = call;
+ return CallTypeHost;
+ }
+ }
+ return CallTypeNone;
+}
+
+template <class Base>
+EncodedJSValue JSCallbackObject<Base>::call(ExecState* exec)
+{
+ JSContextRef execRef = toRef(exec);
+ JSObjectRef functionRef = toRef(exec->callee());
+ JSObjectRef thisObjRef = toRef(exec->hostThisValue().toThisObject(exec));
+
+ for (JSClassRef jsClass = static_cast<JSCallbackObject<Base>*>(toJS(functionRef))->classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (JSObjectCallAsFunctionCallback callAsFunction = jsClass->callAsFunction) {
+ int argumentCount = static_cast<int>(exec->argumentCount());
+ Vector<JSValueRef, 16> arguments(argumentCount);
+ for (int i = 0; i < argumentCount; i++)
+ arguments[i] = toRef(exec, exec->argument(i));
+ JSValueRef exception = 0;
+ JSValue result;
+ {
+ APICallbackShim callbackShim(exec);
+ result = toJS(exec, callAsFunction(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception));
+ }
+ if (exception)
+ throwError(exec, toJS(exec, exception));
+ return JSValue::encode(result);
+ }
+ }
+
+ ASSERT_NOT_REACHED(); // getCallData should prevent us from reaching here
+ return JSValue::encode(JSValue());
+}
+
+template <class Base>
+void JSCallbackObject<Base>::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
+{
+ JSContextRef execRef = toRef(exec);
+ JSObjectRef thisRef = toRef(this);
+
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (JSObjectGetPropertyNamesCallback getPropertyNames = jsClass->getPropertyNames) {
+ APICallbackShim callbackShim(exec);
+ getPropertyNames(execRef, thisRef, toRef(&propertyNames));
+ }
+
+ if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec)) {
+ typedef OpaqueJSClassStaticValuesTable::const_iterator iterator;
+ iterator end = staticValues->end();
+ for (iterator it = staticValues->begin(); it != end; ++it) {
+ UString::Rep* name = it->first.get();
+ StaticValueEntry* entry = it->second;
+ if (entry->getProperty && (!(entry->attributes & kJSPropertyAttributeDontEnum) || (mode == IncludeDontEnumProperties)))
+ propertyNames.add(Identifier(exec, name));
+ }
+ }
+
+ if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+ typedef OpaqueJSClassStaticFunctionsTable::const_iterator iterator;
+ iterator end = staticFunctions->end();
+ for (iterator it = staticFunctions->begin(); it != end; ++it) {
+ UString::Rep* name = it->first.get();
+ StaticFunctionEntry* entry = it->second;
+ if (!(entry->attributes & kJSPropertyAttributeDontEnum) || (mode == IncludeDontEnumProperties))
+ propertyNames.add(Identifier(exec, name));
+ }
+ }
+ }
+
+ Base::getOwnPropertyNames(exec, propertyNames, mode);
+}
+
+template <class Base>
+double JSCallbackObject<Base>::toNumber(ExecState* exec) const
+{
+ // We need this check to guard against the case where this object is rhs of
+ // a binary expression where lhs threw an exception in its conversion to
+ // primitive
+ if (exec->hadException())
+ return NaN;
+ JSContextRef ctx = toRef(exec);
+ JSObjectRef thisRef = toRef(this);
+
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
+ if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
+ JSValueRef exception = 0;
+ JSValueRef value;
+ {
+ APICallbackShim callbackShim(exec);
+ value = convertToType(ctx, thisRef, kJSTypeNumber, &exception);
+ }
+ if (exception) {
+ throwError(exec, toJS(exec, exception));
+ return 0;
+ }
+
+ double dValue;
+ if (value)
+ return toJS(exec, value).getNumber(dValue) ? dValue : NaN;
+ }
+
+ return Base::toNumber(exec);
+}
+
+template <class Base>
+UString JSCallbackObject<Base>::toString(ExecState* exec) const
+{
+ JSContextRef ctx = toRef(exec);
+ JSObjectRef thisRef = toRef(this);
+
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
+ if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType) {
+ JSValueRef exception = 0;
+ JSValueRef value;
+ {
+ APICallbackShim callbackShim(exec);
+ value = convertToType(ctx, thisRef, kJSTypeString, &exception);
+ }
+ if (exception) {
+ throwError(exec, toJS(exec, exception));
+ return "";
+ }
+ if (value)
+ return toJS(exec, value).getString(exec);
+ }
+
+ return Base::toString(exec);
+}
+
+template <class Base>
+void JSCallbackObject<Base>::setPrivate(void* data)
+{
+ m_callbackObjectData->privateData = data;
+}
+
+template <class Base>
+void* JSCallbackObject<Base>::getPrivate()
+{
+ return m_callbackObjectData->privateData;
+}
+
+template <class Base>
+bool JSCallbackObject<Base>::inherits(JSClassRef c) const
+{
+ for (JSClassRef jsClass = classRef(); jsClass; jsClass = jsClass->parentClass)
+ if (jsClass == c)
+ return true;
+
+ return false;
+}
+
+template <class Base>
+JSValue JSCallbackObject<Base>::staticValueGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
+{
+ JSCallbackObject* thisObj = asCallbackObject(slotBase);
+
+ JSObjectRef thisRef = toRef(thisObj);
+ RefPtr<OpaqueJSString> propertyNameRef;
+
+ for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass)
+ if (OpaqueJSClassStaticValuesTable* staticValues = jsClass->staticValues(exec))
+ if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep()))
+ if (JSObjectGetPropertyCallback getProperty = entry->getProperty) {
+ if (!propertyNameRef)
+ propertyNameRef = OpaqueJSString::create(propertyName.ustring());
+ JSValueRef exception = 0;
+ JSValueRef value;
+ {
+ APICallbackShim callbackShim(exec);
+ value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
+ }
+ if (exception) {
+ throwError(exec, toJS(exec, exception));
+ return jsUndefined();
+ }
+ if (value)
+ return toJS(exec, value);
+ }
+
+ return throwError(exec, createReferenceError(exec, "Static value property defined with NULL getProperty callback."));
+}
+
+template <class Base>
+JSValue JSCallbackObject<Base>::staticFunctionGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
+{
+ JSCallbackObject* thisObj = asCallbackObject(slotBase);
+
+ // Check for cached or override property.
+ PropertySlot slot2(thisObj);
+ if (thisObj->Base::getOwnPropertySlot(exec, propertyName, slot2))
+ return slot2.getValue(exec, propertyName);
+
+ for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass) {
+ if (OpaqueJSClassStaticFunctionsTable* staticFunctions = jsClass->staticFunctions(exec)) {
+ if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
+ if (JSObjectCallAsFunctionCallback callAsFunction = entry->callAsFunction) {
+
+ JSObject* o = new (exec) JSCallbackFunction(exec, asGlobalObject(thisObj->getAnonymousValue(0)), callAsFunction, propertyName);
+ thisObj->putDirect(propertyName, o, entry->attributes);
+ return o;
+ }
+ }
+ }
+ }
+
+ return throwError(exec, createReferenceError(exec, "Static function property defined with NULL callAsFunction callback."));
+}
+
+template <class Base>
+JSValue JSCallbackObject<Base>::callbackGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
+{
+ JSCallbackObject* thisObj = asCallbackObject(slotBase);
+
+ JSObjectRef thisRef = toRef(thisObj);
+ RefPtr<OpaqueJSString> propertyNameRef;
+
+ for (JSClassRef jsClass = thisObj->classRef(); jsClass; jsClass = jsClass->parentClass)
+ if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
+ if (!propertyNameRef)
+ propertyNameRef = OpaqueJSString::create(propertyName.ustring());
+ JSValueRef exception = 0;
+ JSValueRef value;
+ {
+ APICallbackShim callbackShim(exec);
+ value = getProperty(toRef(exec), thisRef, propertyNameRef.get(), &exception);
+ }
+ if (exception) {
+ throwError(exec, toJS(exec, exception));
+ return jsUndefined();
+ }
+ if (value)
+ return toJS(exec, value);
+ }
+
+ return throwError(exec, createReferenceError(exec, "hasProperty callback returned true for a property that doesn't exist."));
+}
+
+} // namespace JSC