e915155ca4
Since the object rewrite native property getters/setters are always called with the owning object as the this_value, which in this case is an Array object, and as such this checks are always false.
110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/*
|
||
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
||
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#include <AK/Function.h>
|
||
#include <LibJS/Runtime/Array.h>
|
||
#include <LibJS/Runtime/Error.h>
|
||
#include <LibJS/Runtime/GlobalObject.h>
|
||
|
||
namespace JS {
|
||
|
||
// 10.4.2.2 ArrayCreate ( length [ , proto ] ), https://tc39.es/ecma262/#sec-arraycreate
|
||
Array* Array::create(GlobalObject& global_object, size_t length, Object* prototype)
|
||
{
|
||
auto& vm = global_object.vm();
|
||
if (length > NumericLimits<u32>::max()) {
|
||
vm.throw_exception<RangeError>(global_object, ErrorType::InvalidLength, "array");
|
||
return nullptr;
|
||
}
|
||
if (!prototype)
|
||
prototype = global_object.array_prototype();
|
||
auto* array = global_object.heap().allocate<Array>(global_object, *prototype);
|
||
array->internal_define_own_property(vm.names.length, { .value = Value(length), .writable = true, .enumerable = false, .configurable = false });
|
||
return array;
|
||
}
|
||
|
||
// 7.3.17 CreateArrayFromList ( elements ), https://tc39.es/ecma262/#sec-createarrayfromlist
|
||
Array* Array::create_from(GlobalObject& global_object, Vector<Value> const& elements)
|
||
{
|
||
// 1. Assert: elements is a List whose elements are all ECMAScript language values.
|
||
|
||
// 2. Let array be ! ArrayCreate(0).
|
||
auto* array = Array::create(global_object, 0);
|
||
|
||
// 3. Let n be 0.
|
||
// 4. For each element e of elements, do
|
||
for (u32 n = 0; n < elements.size(); ++n) {
|
||
// a. Perform ! CreateDataPropertyOrThrow(array, ! ToString(𝔽(n)), e).
|
||
array->create_data_property_or_throw(n, elements[n]);
|
||
// b. Set n to n + 1.
|
||
}
|
||
|
||
// 5. Return array.
|
||
return array;
|
||
}
|
||
|
||
Array::Array(Object& prototype)
|
||
: Object(prototype)
|
||
{
|
||
}
|
||
|
||
void Array::initialize(GlobalObject& global_object)
|
||
{
|
||
auto& vm = this->vm();
|
||
Object::initialize(global_object);
|
||
define_native_property(vm.names.length, length_getter, length_setter, Attribute::Writable);
|
||
}
|
||
|
||
Array::~Array()
|
||
{
|
||
}
|
||
|
||
Array* Array::typed_this(VM& vm, GlobalObject& global_object)
|
||
{
|
||
auto* this_object = vm.this_value(global_object).to_object(global_object);
|
||
if (!this_object)
|
||
return {};
|
||
if (!this_object->is_array()) {
|
||
vm.throw_exception<TypeError>(global_object, ErrorType::NotAn, "Array");
|
||
return nullptr;
|
||
}
|
||
return static_cast<Array*>(this_object);
|
||
}
|
||
|
||
JS_DEFINE_NATIVE_GETTER(Array::length_getter)
|
||
{
|
||
auto* this_object = vm.this_value(global_object).to_object(global_object);
|
||
if (!this_object)
|
||
return {};
|
||
|
||
return Value(this_object->indexed_properties().array_like_size());
|
||
}
|
||
|
||
JS_DEFINE_NATIVE_SETTER(Array::length_setter)
|
||
{
|
||
auto* this_object = vm.this_value(global_object).to_object(global_object);
|
||
if (!this_object)
|
||
return;
|
||
|
||
auto length = value.to_number(global_object);
|
||
if (vm.exception())
|
||
return;
|
||
|
||
u32 val = length.as_double();
|
||
|
||
if (val != length.as_double()
|
||
|| length.is_nan()
|
||
|| length.is_infinity()
|
||
|| length.as_double() < 0
|
||
|| length.as_double() > NumericLimits<u32>::max()) {
|
||
vm.throw_exception<RangeError>(global_object, ErrorType::InvalidLength, "array");
|
||
return;
|
||
}
|
||
this_object->indexed_properties().set_array_like_size(val);
|
||
}
|
||
|
||
}
|