mirror of
https://github.com/LadybirdBrowser/ladybird.git
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c0d7f748ed
This commit introduces a WEB_SET_PROTOTYPE_FOR_INTERFACE macro that caches the interface name in a local static FlyString. This means that we only pay for FlyString-from-literal lookup once per browser lifetime instead of every time the interface is instantiated.
145 lines
4.6 KiB
C++
145 lines
4.6 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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* Copyright (c) 2023, Tim Flynn <trflynn89@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/Realm.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibWasm/Types.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/WebAssembly/Table.h>
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#include <LibWeb/WebAssembly/WebAssembly.h>
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namespace Web::WebAssembly {
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JS_DEFINE_ALLOCATOR(Table);
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static Wasm::ValueType table_kind_to_value_type(Bindings::TableKind kind)
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{
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switch (kind) {
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case Bindings::TableKind::Externref:
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return Wasm::ValueType { Wasm::ValueType::ExternReference };
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case Bindings::TableKind::Anyfunc:
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return Wasm::ValueType { Wasm::ValueType::FunctionReference };
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}
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VERIFY_NOT_REACHED();
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}
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static JS::ThrowCompletionOr<Wasm::Value> value_to_reference(JS::VM& vm, JS::Value value, Wasm::ValueType const& reference_type)
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{
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if (value.is_undefined())
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return Wasm::Value(reference_type, 0ull);
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return Detail::to_webassembly_value(vm, value, reference_type);
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}
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WebIDL::ExceptionOr<JS::NonnullGCPtr<Table>> Table::construct_impl(JS::Realm& realm, TableDescriptor& descriptor, JS::Value value)
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{
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auto& vm = realm.vm();
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auto reference_type = table_kind_to_value_type(descriptor.element);
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auto reference_value = TRY(value_to_reference(vm, value, reference_type));
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Wasm::Limits limits { descriptor.initial, move(descriptor.maximum) };
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Wasm::TableType table_type { reference_type, move(limits) };
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auto address = Detail::s_abstract_machine.store().allocate(table_type);
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if (!address.has_value())
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return vm.throw_completion<JS::TypeError>("Wasm Table allocation failed"sv);
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auto const& reference = reference_value.value().get<Wasm::Reference>();
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auto& table = *Detail::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<Table>(realm, realm, *address);
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}
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Table::Table(JS::Realm& realm, Wasm::TableAddress address)
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: Bindings::PlatformObject(realm)
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, m_address(address)
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{
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}
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void Table::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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WEB_SET_PROTOTYPE_FOR_INTERFACE_WITH_CUSTOM_NAME(Table, WebAssembly.Table);
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}
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// https://webassembly.github.io/spec/js-api/#dom-table-grow
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WebIDL::ExceptionOr<u32> Table::grow(u32 delta, JS::Value value)
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{
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auto& vm = this->vm();
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auto* table = Detail::s_abstract_machine.store().get(address());
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if (!table)
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return vm.throw_completion<JS::RangeError>("Could not find the memory table to grow"sv);
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auto initial_size = table->elements().size();
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auto reference_value = TRY(value_to_reference(vm, value, table->type().element_type()));
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auto const& reference = reference_value.value().get<Wasm::Reference>();
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if (!table->grow(delta, reference))
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return vm.throw_completion<JS::RangeError>("Failed to grow table"sv);
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return initial_size;
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}
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// https://webassembly.github.io/spec/js-api/#dom-table-get
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WebIDL::ExceptionOr<JS::Value> Table::get(u32 index) const
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{
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auto& vm = this->vm();
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auto* table = Detail::s_abstract_machine.store().get(address());
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if (!table)
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return vm.throw_completion<JS::RangeError>("Could not find the memory table"sv);
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if (table->elements().size() <= index)
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return vm.throw_completion<JS::RangeError>("Table element index out of range"sv);
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auto& ref = table->elements()[index];
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if (!ref.has_value())
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return JS::js_undefined();
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Wasm::Value wasm_value { ref.value() };
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return Detail::to_js_value(vm, wasm_value);
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}
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// https://webassembly.github.io/spec/js-api/#dom-table-set
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WebIDL::ExceptionOr<void> Table::set(u32 index, JS::Value value)
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{
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auto& vm = this->vm();
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auto* table = Detail::s_abstract_machine.store().get(address());
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if (!table)
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return vm.throw_completion<JS::RangeError>("Could not find the memory table"sv);
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if (table->elements().size() <= index)
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return vm.throw_completion<JS::RangeError>("Table element index out of range"sv);
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auto reference_value = TRY(value_to_reference(vm, value, table->type().element_type()));
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auto const& reference = reference_value.value().get<Wasm::Reference>();
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table->elements()[index] = reference;
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return {};
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}
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// https://webassembly.github.io/spec/js-api/#dom-table-length
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WebIDL::ExceptionOr<u32> Table::length() const
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{
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auto& vm = this->vm();
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auto* table = Detail::s_abstract_machine.store().get(address());
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if (!table)
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return vm.throw_completion<JS::RangeError>("Could not find the memory table"sv);
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return table->elements().size();
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}
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}
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