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/*
* 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);
}
}
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