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/*
* Copyright (c) 2020-2023, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/TypeCasts.h>
#include <LibJS/Runtime/ArrayBuffer.h>
#include <LibJS/Runtime/ArrayBufferConstructor.h>
#include <LibJS/Runtime/DataView.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/TypedArray.h>
namespace JS {
ArrayBufferConstructor::ArrayBufferConstructor(Realm& realm)
: NativeFunction(realm.vm().names.ArrayBuffer.as_string(), realm.intrinsics().function_prototype())
{
}
ThrowCompletionOr<void> ArrayBufferConstructor::initialize(Realm& realm)
{
auto& vm = this->vm();
MUST_OR_THROW_OOM(NativeFunction::initialize(realm));
// 25.1.4.2 ArrayBuffer.prototype, https://tc39.es/ecma262/#sec-arraybuffer.prototype
define_direct_property(vm.names.prototype, realm.intrinsics().array_buffer_prototype(), 0);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(realm, vm.names.isView, is_view, 1, attr);
// 25.1.5.4 ArrayBuffer.prototype [ @@toStringTag ], https://tc39.es/ecma262/#sec-arraybuffer.prototype-@@tostringtag
define_native_accessor(realm, vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
return {};
}
// 25.1.3.1 ArrayBuffer ( length ), https://tc39.es/ecma262/#sec-arraybuffer-length
ThrowCompletionOr<Value> ArrayBufferConstructor::call()
{
auto& vm = this->vm();
// 1. If NewTarget is undefined, throw a TypeError exception.
return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.ArrayBuffer);
}
// 25.1.3.1 ArrayBuffer ( length ), https://tc39.es/ecma262/#sec-arraybuffer-length
ThrowCompletionOr<NonnullGCPtr<Object>> ArrayBufferConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
// 2. Let byteLength be ? ToIndex(length).
auto byte_length_or_error = vm.argument(0).to_index(vm);
if (byte_length_or_error.is_error()) {
auto error = byte_length_or_error.release_error();
if (error.value()->is_object() && is<RangeError>(error.value()->as_object())) {
// Re-throw more specific RangeError
return vm.throw_completion<RangeError>(ErrorType::InvalidLength, "array buffer");
}
return error;
}
// 3. Return ? AllocateArrayBuffer(NewTarget, byteLength).
return *TRY(allocate_array_buffer(vm, new_target, byte_length_or_error.release_value()));
}
// 25.1.4.1 ArrayBuffer.isView ( arg ), https://tc39.es/ecma262/#sec-arraybuffer.isview
JS_DEFINE_NATIVE_FUNCTION(ArrayBufferConstructor::is_view)
{
auto arg = vm.argument(0);
// 1. If arg is not an Object, return false.
if (!arg.is_object())
return Value(false);
// 2. If arg has a [[ViewedArrayBuffer]] internal slot, return true.
if (arg.as_object().is_typed_array())
return Value(true);
if (is<DataView>(arg.as_object()))
return Value(true);
// 3. Return false.
return Value(false);
}
// 25.1.4.3 get ArrayBuffer [ @@species ], https://tc39.es/ecma262/#sec-get-arraybuffer-@@species
JS_DEFINE_NATIVE_FUNCTION(ArrayBufferConstructor::symbol_species_getter)
{
// 1. Return the this value.
return vm.this_value();
}
}
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