Source/JavaScriptCore/runtime/JSRawJSONObject.cpp

/*
 * Copyright (C) 2022-2024 Apple Inc. All rights reserved.
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#include "config.h"
#include "JSRawJSONObject.h"

#include "JSCInlines.h"
#include "PropertyNameArray.h"
#include "TypeError.h"

namespace JSC {

STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(JSRawJSONObject);

const ClassInfo JSRawJSONObject::s_info = { "Object"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSRawJSONObject) };

JSRawJSONObject::JSRawJSONObject(VM& vm, Structure* structure, Butterfly* butterfly)
    : Base(vm, structure, butterfly)
{
}

void JSRawJSONObject::finishCreation(VM& vm, JSString* string)
{
    Base::finishCreation(vm);
    ASSERT(inherits(info()));
    putDirectOffset(vm, rawJSONObjectRawJSONPropertyOffset, string);
}

Structure* JSRawJSONObject::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
    auto* structure = Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
    structure->addPropertyWithoutTransition(
        vm, vm.propertyNames->rawJSON, PropertyAttribute::ReadOnly | PropertyAttribute::DontDelete,
        [&] (const GCSafeConcurrentJSLocker&, PropertyOffset offset, PropertyOffset newMaxOffset) {
            RELEASE_ASSERT(offset == rawJSONObjectRawJSONPropertyOffset);
            structure->setMaxOffset(vm, newMaxOffset);
        });
    structure->setDidPreventExtensions(true);
    return structure;
}

JSString* JSRawJSONObject::rawJSON(VM& vm)
{
    if (!structure()->didTransition()) [[likely]]
        return jsCast<JSString*>(getDirect(rawJSONObjectRawJSONPropertyOffset));
    return jsCast<JSString*>(getDirect(vm, vm.propertyNames->rawJSON));
}

} // namespace JSC