mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 13:32:45 +00:00
94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
/*
|
|
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibJS/Runtime/AbstractOperations.h>
|
|
#include <LibJS/Runtime/DataView.h>
|
|
#include <LibJS/Runtime/DataViewConstructor.h>
|
|
#include <LibJS/Runtime/Error.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
|
|
namespace JS {
|
|
|
|
DataViewConstructor::DataViewConstructor(GlobalObject& global_object)
|
|
: NativeFunction(vm().names.DataView.as_string(), *global_object.function_prototype())
|
|
{
|
|
}
|
|
|
|
void DataViewConstructor::initialize(GlobalObject& global_object)
|
|
{
|
|
auto& vm = this->vm();
|
|
NativeFunction::initialize(global_object);
|
|
|
|
// 25.3.3.1 DataView.prototype, https://tc39.es/ecma262/#sec-dataview.prototype
|
|
define_direct_property(vm.names.prototype, global_object.data_view_prototype(), 0);
|
|
|
|
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
|
|
}
|
|
|
|
DataViewConstructor::~DataViewConstructor()
|
|
{
|
|
}
|
|
|
|
// 25.3.2.1 DataView ( buffer [ , byteOffset [ , byteLength ] ] ), https://tc39.es/ecma262/#sec-dataview-buffer-byteoffset-bytelength
|
|
Value DataViewConstructor::call()
|
|
{
|
|
auto& vm = this->vm();
|
|
vm.throw_exception<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.DataView);
|
|
return {};
|
|
}
|
|
|
|
// 25.3.2.1 DataView ( buffer [ , byteOffset [ , byteLength ] ] ), https://tc39.es/ecma262/#sec-dataview-buffer-byteoffset-bytelength
|
|
Value DataViewConstructor::construct(FunctionObject& new_target)
|
|
{
|
|
auto& vm = this->vm();
|
|
auto& global_object = this->global_object();
|
|
|
|
auto buffer = vm.argument(0);
|
|
if (!buffer.is_object() || !is<ArrayBuffer>(buffer.as_object())) {
|
|
vm.throw_exception<TypeError>(global_object, ErrorType::IsNotAn, buffer.to_string_without_side_effects(), vm.names.ArrayBuffer);
|
|
return {};
|
|
}
|
|
auto& array_buffer = static_cast<ArrayBuffer&>(buffer.as_object());
|
|
|
|
auto offset = vm.argument(1).to_index(global_object);
|
|
if (vm.exception())
|
|
return {};
|
|
|
|
if (array_buffer.is_detached()) {
|
|
vm.throw_exception<TypeError>(global_object, ErrorType::DetachedArrayBuffer);
|
|
return {};
|
|
}
|
|
|
|
auto buffer_byte_length = array_buffer.byte_length();
|
|
if (offset > buffer_byte_length) {
|
|
vm.throw_exception<RangeError>(global_object, ErrorType::DataViewOutOfRangeByteOffset, offset, buffer_byte_length);
|
|
return {};
|
|
}
|
|
|
|
size_t view_byte_length;
|
|
if (vm.argument(2).is_undefined()) {
|
|
view_byte_length = buffer_byte_length - offset;
|
|
} else {
|
|
view_byte_length = vm.argument(2).to_index(global_object);
|
|
if (vm.exception())
|
|
return {};
|
|
if (offset + view_byte_length > buffer_byte_length) {
|
|
vm.throw_exception<RangeError>(global_object, ErrorType::InvalidLength, vm.names.DataView);
|
|
return {};
|
|
}
|
|
}
|
|
|
|
auto* data_view = TRY_OR_DISCARD(ordinary_create_from_constructor<DataView>(global_object, new_target, &GlobalObject::data_view_prototype, &array_buffer, view_byte_length, offset));
|
|
|
|
if (array_buffer.is_detached()) {
|
|
vm.throw_exception<TypeError>(global_object, ErrorType::DetachedArrayBuffer);
|
|
return {};
|
|
}
|
|
|
|
return data_view;
|
|
}
|
|
|
|
}
|