b1441a47b1
Before this it would always go through the native setter thus modifying the array but now you can set length to anything
114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Function.h>
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#include <LibJS/Runtime/Array.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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namespace JS {
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// 10.4.2.2 ArrayCreate ( length [ , proto ] ), https://tc39.es/ecma262/#sec-arraycreate
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Array* Array::create(GlobalObject& global_object, size_t length)
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{
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// FIXME: Support proto parameter
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if (length > NumericLimits<u32>::max()) {
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auto& vm = global_object.vm();
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vm.throw_exception<RangeError>(global_object, ErrorType::InvalidLength, "array");
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return nullptr;
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}
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auto* array = global_object.heap().allocate<Array>(global_object, *global_object.array_prototype());
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array->indexed_properties().set_array_like_size(length);
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return array;
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}
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// 7.3.17 CreateArrayFromList ( elements ), https://tc39.es/ecma262/#sec-createarrayfromlist
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Array* Array::create_from(GlobalObject& global_object, const Vector<Value>& elements)
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{
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auto* array = Array::create(global_object);
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for (size_t i = 0; i < elements.size(); ++i)
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array->define_property(i, elements[i]);
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return array;
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}
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Array::Array(Object& prototype)
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: Object(prototype)
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{
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}
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void Array::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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Object::initialize(global_object);
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define_native_property(vm.names.length, length_getter, length_setter, Attribute::Writable);
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}
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Array::~Array()
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{
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}
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Array* Array::typed_this(VM& vm, GlobalObject& global_object)
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{
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auto* this_object = vm.this_value(global_object).to_object(global_object);
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if (!this_object)
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return {};
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if (!this_object->is_array()) {
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vm.throw_exception<TypeError>(global_object, ErrorType::NotAn, "Array");
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return nullptr;
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}
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return static_cast<Array*>(this_object);
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}
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JS_DEFINE_NATIVE_GETTER(Array::length_getter)
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{
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auto* this_object = vm.this_value(global_object).to_object(global_object);
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if (!this_object)
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return {};
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// TODO: could be incorrect if receiver/this_value is fixed or changed
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if (!this_object->is_array()) {
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Value val = this_object->get_own_property(vm.names.length.to_string_or_symbol(), this_object);
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if (vm.exception())
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return {};
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return val;
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}
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return Value(this_object->indexed_properties().array_like_size());
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}
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JS_DEFINE_NATIVE_SETTER(Array::length_setter)
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{
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auto* this_object = vm.this_value(global_object).to_object(global_object);
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if (!this_object)
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return;
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// TODO: could be incorrect if receiver/this_value is fixed or changed
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if (!this_object->is_array()) {
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this_object->define_property(vm.names.length.to_string_or_symbol(), value, default_attributes);
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if (vm.exception())
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return;
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return;
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}
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auto length = value.to_number(global_object);
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if (vm.exception())
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return;
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u32 val = length.as_double();
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if (val != length.as_double()
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|| length.is_nan()
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|| length.is_infinity()
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|| length.as_double() < 0
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|| length.as_double() > NumericLimits<u32>::max()) {
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vm.throw_exception<RangeError>(global_object, ErrorType::InvalidLength, "array");
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return;
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}
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this_object->indexed_properties().set_array_like_size(val);
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}
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}
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