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 && args.at(0).isNumber()) {
uint32_t n = args.at(0).toUInt32(exec);
if (n != args.at(0).toNumber(exec))
return throwError(exec, createRangeError(exec, "Array size is not a small enough positive integer."));
return new (exec) JSArray(exec->globalData(), globalObject->arrayStructure(), n, CreateInitialized);
}
// otherwise the array is constructed with the arguments in it
return new (exec) JSArray(exec->globalData(), globalObject->arrayStructure(), args);
}
// 15.3.4.5 Function.prototype.bind (thisArg [, arg1 [, arg2, ...]])
EncodedJSValue JSC_HOST_CALL functionProtoFuncBind(ExecState* exec)
{
JSGlobalObject* globalObject = exec->callee()->globalObject();
// Let Target be the this value.
JSValue target = exec->hostThisValue();
// If IsCallable(Target) is false, throw a TypeError exception.
CallData callData;
CallType callType = getCallData(target, callData);
if (callType == CallTypeNone)
return throwVMTypeError(exec);
// Primitive values are not callable.
ASSERT(target.isObject());
JSObject* targetObject = asObject(target);
// Let A be a new (possibly empty) internal list of all of the argument values provided after thisArg (arg1, arg2 etc), in order.
size_t numBoundArgs = exec->argumentCount() > 1 ? exec->argumentCount() - 1 : 0;
JSArray* boundArgs = JSArray::tryCreateUninitialized(exec->globalData(), globalObject->arrayStructure(), numBoundArgs);
if (!boundArgs)
return JSValue::encode(throwOutOfMemoryError(exec));
for (size_t i = 0; i < numBoundArgs; ++i)
boundArgs->initializeIndex(exec->globalData(), i, exec->argument(i + 1));
boundArgs->completeInitialization(numBoundArgs);
// If the [[Class]] internal property of Target is "Function", then ...
// Else set the length own property of F to 0.
unsigned length = 0;
if (targetObject->inherits(&JSFunction::s_info)) {
ASSERT(target.get(exec, exec->propertyNames().length).isNumber());
// a. Let L be the length property of Target minus the length of A.
// b. Set the length own property of F to either 0 or L, whichever is larger.
unsigned targetLength = (unsigned)target.get(exec, exec->propertyNames().length).asNumber();
if (targetLength > numBoundArgs)
length = targetLength - numBoundArgs;
}
Identifier name(exec, target.get(exec, exec->propertyNames().name).toString(exec)->value(exec));
return JSValue::encode(JSBoundFunction::create(exec, globalObject, targetObject, exec->argument(0), boundArgs, length, name));
}
