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/*
* Copyright (C) 2006 Maks Orlovich
* Copyright (C) 2006-2021 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include "JSInternalFieldObjectImpl.h"
namespace JSC {
// This class is used as a base for classes such as String,
// Number, Boolean and Symbol which are wrappers for primitive types.
class JSWrapperObject : public JSInternalFieldObjectImpl<1> {
public:
using Base = JSInternalFieldObjectImpl<1>;
template<typename, SubspaceAccess>
static void subspaceFor(VM&)
{
RELEASE_ASSERT_NOT_REACHED();
}
static size_t allocationSize(Checked<size_t> inlineCapacity)
{
ASSERT_UNUSED(inlineCapacity, !inlineCapacity);
return sizeof(JSWrapperObject);
}
enum class Field : uint32_t {
WrappedValue = 0,
};
static_assert(numberOfInternalFields == 1);
JSValue internalValue() const;
void setInternalValue(VM&, JSValue);
static constexpr ptrdiff_t internalValueOffset() { return offsetOfInternalField(static_cast<unsigned>(Field::WrappedValue)); }
static constexpr ptrdiff_t internalValueCellOffset()
{
#if USE(JSVALUE64)
return internalValueOffset();
#else
return internalValueOffset() + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload);
#endif
}
protected:
explicit JSWrapperObject(VM&, Structure*);
DECLARE_VISIT_CHILDREN_WITH_MODIFIER(JS_EXPORT_PRIVATE);
};
inline JSWrapperObject::JSWrapperObject(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
inline JSValue JSWrapperObject::internalValue() const
{
return internalField(static_cast<unsigned>(Field::WrappedValue)).get();
}
inline void JSWrapperObject::setInternalValue(VM& vm, JSValue value)
{
ASSERT(value);
ASSERT(!value.isObject());
internalField(static_cast<unsigned>(Field::WrappedValue)).set(vm, this, value);
}
} // namespace JSC
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