mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 21:52:45 +00:00
fca08bd000
This moves us towards being able to run JavaScript in different global objects without allocating a separate GC heap.
116 lines
4.4 KiB
C++
116 lines
4.4 KiB
C++
/*
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* Copyright (c) 2020, Stephan Unverwerth <s.unverwerth@gmx.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Function.h>
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#include <LibJS/AST.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/ScriptFunction.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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ScriptFunction* ScriptFunction::create(GlobalObject& global_object, const FlyString& name, const Statement& body, Vector<FlyString> parameters, LexicalEnvironment* parent_environment)
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{
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return global_object.heap().allocate<ScriptFunction>(name, body, move(parameters), parent_environment, *global_object.function_prototype());
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}
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ScriptFunction::ScriptFunction(const FlyString& name, const Statement& body, Vector<FlyString> parameters, LexicalEnvironment* parent_environment, Object& prototype)
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: Function(prototype)
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, m_name(name)
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, m_body(body)
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, m_parameters(move(parameters))
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, m_parent_environment(parent_environment)
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{
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put("prototype", Object::create_empty(interpreter(), interpreter().global_object()));
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put_native_property("length", length_getter, length_setter);
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}
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ScriptFunction::~ScriptFunction()
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{
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}
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void ScriptFunction::visit_children(Visitor& visitor)
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{
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Function::visit_children(visitor);
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visitor.visit(m_parent_environment);
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}
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LexicalEnvironment* ScriptFunction::create_environment()
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{
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HashMap<FlyString, Variable> variables;
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for (auto& parameter : m_parameters) {
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variables.set(parameter, { js_undefined(), DeclarationKind::Var });
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}
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if (body().is_scope_node()) {
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for (auto& declaration : static_cast<const ScopeNode&>(body()).variables()) {
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for (auto& declarator : declaration.declarations()) {
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variables.set(declarator.id().string(), { js_undefined(), DeclarationKind::Var });
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}
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}
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}
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if (variables.is_empty())
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return m_parent_environment;
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return heap().allocate<LexicalEnvironment>(move(variables), m_parent_environment);
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}
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Value ScriptFunction::call(Interpreter& interpreter)
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{
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auto& argument_values = interpreter.call_frame().arguments;
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ArgumentVector arguments;
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for (size_t i = 0; i < m_parameters.size(); ++i) {
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auto name = parameters()[i];
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auto value = js_undefined();
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if (i < argument_values.size())
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value = argument_values[i];
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arguments.append({ name, value });
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interpreter.current_environment()->set(name, { value, DeclarationKind::Var });
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}
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return interpreter.run(m_body, arguments, ScopeType::Function);
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}
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Value ScriptFunction::construct(Interpreter& interpreter)
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{
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return call(interpreter);
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}
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Value ScriptFunction::length_getter(Interpreter& interpreter)
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{
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auto* this_object = interpreter.this_value().to_object(interpreter.heap());
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if (!this_object)
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return {};
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if (!this_object->is_function())
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return interpreter.throw_exception<TypeError>("Not a function");
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return Value(static_cast<i32>(static_cast<const ScriptFunction*>(this_object)->parameters().size()));
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}
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void ScriptFunction::length_setter(Interpreter&, Value)
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{
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}
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}
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