ladybird/Libraries/LibJS/Runtime/ArrayBufferConstructor.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/ArrayBuffer.h>
#include <LibJS/Runtime/ArrayBufferConstructor.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/TypedArray.h>

namespace JS {

ArrayBufferConstructor::ArrayBufferConstructor(GlobalObject& global_object)
    : NativeFunction(vm().names.ArrayBuffer, *global_object.function_prototype())
{
}

void ArrayBufferConstructor::initialize(GlobalObject& global_object)
{
    auto& vm = this->vm();
    NativeFunction::initialize(global_object);
    u8 attr = Attribute::Writable | Attribute::Configurable;
    define_property(vm.names.prototype, global_object.array_buffer_prototype(), 0);
    define_property(vm.names.length, Value(1), Attribute::Configurable);
    define_native_function(vm.names.isView, is_view, 1, attr);
}

ArrayBufferConstructor::~ArrayBufferConstructor()
{
}

Value ArrayBufferConstructor::call()
{
    auto& vm = this->vm();
    vm.throw_exception<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.ArrayBuffer);
    return {};
}

Value ArrayBufferConstructor::construct(Function&)
{
    auto& vm = this->vm();
    auto byte_length = vm.argument(0).to_index(global_object());
    if (vm.exception()) {
        // Re-throw more specific RangeError
        vm.clear_exception();
        vm.throw_exception<RangeError>(global_object(), ErrorType::InvalidLength, "array buffer");
        return {};
    }
    return ArrayBuffer::create(global_object(), byte_length);
}

JS_DEFINE_NATIVE_FUNCTION(ArrayBufferConstructor::is_view)
{
    auto arg = vm.argument(0);
    if (!arg.is_object())
        return Value(false);
    if (arg.as_object().is_typed_array())
        return Value(true);
    // FIXME: Check for DataView as well
    return Value(false);
}

}