SpeculatedType speculationFromClassInfo(const ClassInfo* classInfo)
{
if (classInfo == JSFinalObject::info())
return SpecFinalObject;
if (classInfo == JSArray::info())
return SpecArray;
if (classInfo == Arguments::info())
return SpecArguments;
if (classInfo == StringObject::info())
return SpecStringObject;
if (classInfo->isSubClassOf(JSFunction::info()))
return SpecFunction;
if (isTypedView(classInfo->typedArrayStorageType))
return speculationFromTypedArrayType(classInfo->typedArrayStorageType);
if (classInfo->isSubClassOf(JSObject::info()))
return SpecObjectOther;
return SpecCellOther;
}
EncodedJSValue JSC_HOST_CALL typedArrayViewPrivateFuncGetOriginalConstructor(ExecState* exec)
{
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
TypedArrayType type = exec->uncheckedArgument(0).getObject()->classInfo()->typedArrayStorageType;
ASSERT(isTypedView(type));
return JSValue::encode(globalObject->typedArrayConstructor(type));
}
inline bool GetByIdVariant::canMergeIntrinsicStructures(const GetByIdVariant& other) const
{
if (m_intrinsicFunction != other.m_intrinsicFunction)
return false;
switch (intrinsic()) {
case TypedArrayByteLengthIntrinsic: {
// We can merge these sets as long as the element size of the two sets is the same.
TypedArrayType thisType = (*m_structureSet.begin())->classInfo()->typedArrayStorageType;
TypedArrayType otherType = (*other.m_structureSet.begin())->classInfo()->typedArrayStorageType;
ASSERT(isTypedView(thisType) && isTypedView(otherType));
return logElementSize(thisType) == logElementSize(otherType);
}
default:
return true;
}
RELEASE_ASSERT_NOT_REACHED();
}
EncodedJSValue JSC_HOST_CALL typedArrayViewPrivateFuncLength(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue argument = exec->argument(0);
if (!argument.isCell() || !isTypedView(argument.asCell()->classInfo()->typedArrayStorageType))
return throwVMTypeError(exec, scope, ASCIILiteral("Receiver should be a typed array view"));
JSArrayBufferView* thisObject = jsCast<JSArrayBufferView*>(argument);
if (thisObject->isNeutered())
return throwVMTypeError(exec, scope, ASCIILiteral("Underlying ArrayBuffer has been detached from the view"));
return JSValue::encode(jsNumber(thisObject->length()));
}
bool AccessCase::canEmitIntrinsicGetter(JSFunction* getter, Structure* structure)
{
switch (getter->intrinsic()) {
case TypedArrayByteOffsetIntrinsic:
case TypedArrayByteLengthIntrinsic:
case TypedArrayLengthIntrinsic: {
TypedArrayType type = structure->classInfo()->typedArrayStorageType;
if (!isTypedView(type))
return false;
return true;
}
default:
return false;
}
RELEASE_ASSERT_NOT_REACHED();
}
EncodedJSValue JSC_HOST_CALL typedArrayViewPrivateFuncIsTypedArrayView(ExecState* exec)
{
JSValue value = exec->uncheckedArgument(0);
return JSValue::encode(jsBoolean(value.isCell() && isTypedView(value.asCell()->classInfo()->typedArrayStorageType)));
}
