ladybird/Libraries/LibJS/Runtime/TypedArrayPrototype.cpp

/*
 * Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/TypedArray.h>
#include <LibJS/Runtime/TypedArrayPrototype.h>

namespace JS {

TypedArrayPrototype::TypedArrayPrototype(GlobalObject& global_object)
    : Object(*global_object.object_prototype())
{
}

void TypedArrayPrototype::initialize(GlobalObject& object)
{
    auto& vm = this->vm();
    Object::initialize(object);
    // FIXME: This should be an accessor property
    define_native_property(vm.names.length, length_getter, nullptr, Attribute::Configurable);
}

TypedArrayPrototype::~TypedArrayPrototype()
{
}

static TypedArrayBase* typed_array_from(VM& vm, GlobalObject& global_object)
{
    auto* this_object = vm.this_value(global_object).to_object(global_object);
    if (!this_object)
        return nullptr;
    if (!this_object->is_typed_array()) {
        vm.throw_exception<TypeError>(global_object, ErrorType::NotA, "TypedArray");
        return nullptr;
    }
    return static_cast<TypedArrayBase*>(this_object);
}

JS_DEFINE_NATIVE_GETTER(TypedArrayPrototype::length_getter)
{
    auto typed_array = typed_array_from(vm, global_object);
    if (!typed_array)
        return {};
    return Value(typed_array->array_length());
}

}