mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-04-25 14:05:15 +00:00
7b863330dc
Roughly 7% of test-js runtime was spent creating FlyStrings from string literals. This patch frontloads that work and caches all the commonly used names in LibJS on a CommonPropertyNames struct that hangs off VM.
136 lines
4.5 KiB
C++
136 lines
4.5 KiB
C++
/*
|
|
* Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
|
|
* 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/Error.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
#include <LibJS/Runtime/IteratorOperations.h>
|
|
|
|
namespace JS {
|
|
|
|
Object* get_iterator(GlobalObject& global_object, Value value, String hint, Value method)
|
|
{
|
|
auto& vm = global_object.vm();
|
|
ASSERT(hint == "sync" || hint == "async");
|
|
if (method.is_empty()) {
|
|
if (hint == "async")
|
|
TODO();
|
|
auto object = value.to_object(global_object);
|
|
if (!object)
|
|
return {};
|
|
method = object->get(global_object.vm().well_known_symbol_iterator());
|
|
if (vm.exception())
|
|
return {};
|
|
}
|
|
if (!method.is_function()) {
|
|
vm.throw_exception<TypeError>(global_object, ErrorType::NotIterable, value.to_string_without_side_effects());
|
|
return nullptr;
|
|
}
|
|
auto iterator = vm.call(method.as_function(), value);
|
|
if (vm.exception())
|
|
return {};
|
|
if (!iterator.is_object()) {
|
|
vm.throw_exception<TypeError>(global_object, ErrorType::NotIterable, value.to_string_without_side_effects());
|
|
return nullptr;
|
|
}
|
|
return &iterator.as_object();
|
|
}
|
|
|
|
Object* iterator_next(Object& iterator, Value value)
|
|
{
|
|
auto& vm = iterator.vm();
|
|
auto& global_object = iterator.global_object();
|
|
auto next_method = iterator.get(vm.names.next);
|
|
if (vm.exception())
|
|
return {};
|
|
|
|
if (!next_method.is_function()) {
|
|
vm.throw_exception<TypeError>(global_object, ErrorType::IterableNextNotAFunction);
|
|
return nullptr;
|
|
}
|
|
|
|
Value result;
|
|
if (value.is_empty())
|
|
result = vm.call(next_method.as_function(), &iterator);
|
|
else
|
|
result = vm.call(next_method.as_function(), &iterator, value);
|
|
|
|
if (vm.exception())
|
|
return {};
|
|
if (!result.is_object()) {
|
|
vm.throw_exception<TypeError>(global_object, ErrorType::IterableNextBadReturn);
|
|
return nullptr;
|
|
}
|
|
|
|
return &result.as_object();
|
|
}
|
|
|
|
void iterator_close(Object& iterator)
|
|
{
|
|
(void)iterator;
|
|
TODO();
|
|
}
|
|
|
|
Value create_iterator_result_object(GlobalObject& global_object, Value value, bool done)
|
|
{
|
|
auto& vm = global_object.vm();
|
|
auto* object = Object::create_empty(global_object);
|
|
object->define_property(vm.names.value, value);
|
|
object->define_property(vm.names.done, Value(done));
|
|
return object;
|
|
}
|
|
|
|
void get_iterator_values(GlobalObject& global_object, Value value, AK::Function<IterationDecision(Value)> callback)
|
|
{
|
|
auto& vm = global_object.vm();
|
|
|
|
auto iterator = get_iterator(global_object, value);
|
|
if (!iterator)
|
|
return;
|
|
|
|
while (true) {
|
|
auto next_object = iterator_next(*iterator);
|
|
if (!next_object)
|
|
return;
|
|
|
|
auto done_property = next_object->get(vm.names.done);
|
|
if (vm.exception())
|
|
return;
|
|
|
|
if (!done_property.is_empty() && done_property.to_boolean())
|
|
return;
|
|
|
|
auto next_value = next_object->get(vm.names.value);
|
|
if (vm.exception())
|
|
return;
|
|
|
|
auto result = callback(next_value);
|
|
if (result == IterationDecision::Break)
|
|
return;
|
|
ASSERT(result == IterationDecision::Continue);
|
|
}
|
|
}
|
|
|
|
}
|