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https://github.com/RGBCube/serenity
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c37820b898
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
93 lines
3.6 KiB
C++
93 lines
3.6 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/TypedArray.h>
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#include <LibWeb/Bindings/WindowObject.h>
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#include <LibWeb/WebAssembly/WebAssemblyObject.h>
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#include <LibWeb/WebAssembly/WebAssemblyTableConstructor.h>
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#include <LibWeb/WebAssembly/WebAssemblyTableObject.h>
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#include <LibWeb/WebAssembly/WebAssemblyTablePrototype.h>
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namespace Web::Bindings {
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WebAssemblyTableConstructor::WebAssemblyTableConstructor(JS::GlobalObject& global_object)
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: NativeFunction(*global_object.function_prototype())
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{
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}
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WebAssemblyTableConstructor::~WebAssemblyTableConstructor() = default;
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JS::ThrowCompletionOr<JS::Value> WebAssemblyTableConstructor::call()
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{
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return vm().throw_completion<JS::TypeError>(global_object(), JS::ErrorType::ConstructorWithoutNew, "WebAssembly.Table");
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}
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JS::ThrowCompletionOr<JS::Object*> WebAssemblyTableConstructor::construct(FunctionObject&)
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{
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auto& vm = this->vm();
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auto& global_object = this->global_object();
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auto descriptor = TRY(vm.argument(0).to_object(global_object));
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auto element_value = TRY(descriptor->get("element"));
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if (!element_value.is_string())
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return vm.throw_completion<JS::TypeError>(global_object, JS::ErrorType::InvalidHint, element_value.to_string_without_side_effects());
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auto& element = element_value.as_string().string();
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Optional<Wasm::ValueType> reference_type;
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if (element == "anyfunc"sv)
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reference_type = Wasm::ValueType(Wasm::ValueType::FunctionReference);
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else if (element == "externref"sv)
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reference_type = Wasm::ValueType(Wasm::ValueType::ExternReference);
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if (!reference_type.has_value())
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return vm.throw_completion<JS::TypeError>(global_object, JS::ErrorType::InvalidHint, element);
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auto initial_value = TRY(descriptor->get("initial"));
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auto maximum_value = TRY(descriptor->get("maximum"));
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auto initial = TRY(initial_value.to_u32(global_object));
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Optional<u32> maximum;
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if (!maximum_value.is_undefined())
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maximum = TRY(maximum_value.to_u32(global_object));
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if (maximum.has_value() && maximum.value() < initial)
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return vm.throw_completion<JS::RangeError>(global_object, "maximum should be larger than or equal to initial");
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auto value_value = TRY(descriptor->get("value"));
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auto reference_value = TRY([&]() -> JS::ThrowCompletionOr<Wasm::Value> {
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if (value_value.is_undefined())
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return Wasm::Value(*reference_type, 0ull);
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return to_webassembly_value(global_object, value_value, *reference_type);
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}());
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auto& reference = reference_value.value().get<Wasm::Reference>();
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auto address = WebAssemblyObject::s_abstract_machine.store().allocate(Wasm::TableType { *reference_type, Wasm::Limits { initial, maximum } });
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if (!address.has_value())
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return vm.throw_completion<JS::TypeError>(global_object, "Wasm Table allocation failed");
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auto& table = *WebAssemblyObject::s_abstract_machine.store().get(*address);
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for (auto& element : table.elements())
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element = reference;
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return vm.heap().allocate<WebAssemblyTableObject>(global_object, global_object, *address);
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}
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void WebAssemblyTableConstructor::initialize(JS::GlobalObject& global_object)
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{
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auto& vm = this->vm();
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auto& window = static_cast<WindowObject&>(global_object);
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NativeFunction::initialize(global_object);
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define_direct_property(vm.names.prototype, &window.ensure_web_prototype<WebAssemblyTablePrototype>("WebAssemblyTablePrototype"), 0);
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define_direct_property(vm.names.length, JS::Value(1), JS::Attribute::Configurable);
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}
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}
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