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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the V4VM module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QV4PROPERTYDESCRIPTOR_H
#define QV4PROPERTYDESCRIPTOR_H
#include "qv4global.h"
#include "qv4value.h"
#include "qv4internalclass.h"
QT_BEGIN_NAMESPACE
namespace QQmlJS {
namespace VM {
struct FunctionObject;
struct Property {
union {
Value value;
struct {
FunctionObject *get;
FunctionObject *set;
};
};
};
struct PropertyDescriptor : public Property
{
enum Type {
Generic,
Data,
Accessor
};
enum State {
Undefined,
Disabled,
Enabled
};
uint type : 8;
uint writable : 8;
uint enumerable : 8;
uint configurable : 8;
static inline PropertyDescriptor fromValue(Value v) {
PropertyDescriptor pd;
pd.value = v;
pd.type = Data;
pd.writable = Undefined;
pd.enumerable = Undefined;
pd.configurable = Undefined;
return pd;
}
static inline PropertyDescriptor fromAccessor(FunctionObject *getter, FunctionObject *setter) {
PropertyDescriptor pd;
pd.get = getter;
pd.set = setter;
pd.type = Accessor;
pd.writable = Undefined;
pd.enumerable = Undefined;
pd.configurable = Undefined;
return pd;
}
PropertyAttributes toPropertyAttributes() const {
PropertyAttributes attrs;
attrs.setType(type == Accessor ? PropertyAttributes::Accessor : PropertyAttributes::Data);
attrs.setWritable(writable == Enabled);
attrs.setEnumberable(enumerable == Enabled);
attrs.setConfigurable(configurable == Enabled);
return attrs;
}
// Section 8.10
inline void fullyPopulated() {
if (type == Generic) {
type = Data;
value = Value::undefinedValue();
}
if (type == Data) {
if (writable == Undefined)
writable = Disabled;
} else {
writable = Undefined;
if ((quintptr)get == 0x1)
get = 0;
if ((quintptr)set == 0x1)
set = 0;
}
if (enumerable == Undefined)
enumerable = Disabled;
if (configurable == Undefined)
configurable = Disabled;
}
inline bool isData() const { return type == Data || writable != Undefined; }
inline bool isAccessor() const { return type == Accessor; }
inline bool isGeneric() const { return type == Generic && writable == Undefined; }
inline bool isWritable() const { return writable == Enabled; }
inline bool isEnumerable() const { return enumerable == Enabled; }
inline bool isConfigurable() const { return configurable == Enabled; }
inline bool isEmpty() const {
return type == Generic && writable == Undefined && enumerable == Undefined && configurable == Undefined;
}
inline bool isSubset(PropertyDescriptor *other) const {
if (type != Generic && type != other->type)
return false;
if (enumerable != Undefined && enumerable != other->enumerable)
return false;
if (configurable != Undefined && configurable != other->configurable)
return false;
if (writable != Undefined && writable != other->writable)
return false;
if (type == Data && !value.sameValue(other->value))
return false;
if (type == Accessor) {
if (get != other->get)
return false;
if (set != other->set)
return false;
}
return true;
}
inline void operator+=(const PropertyDescriptor &other) {
if (other.enumerable != Undefined)
enumerable = other.enumerable;
if (other.configurable != Undefined)
configurable = other.configurable;
if (other.writable != Undefined)
writable = other.writable;
if (other.type == Accessor) {
type = Accessor;
if (other.get)
get = ((quintptr)other.get == 0x1) ? 0 : other.get;
if (other.set)
set = ((quintptr)other.set == 0x1) ? 0 : other.set;
} else if (other.type == Data){
type = Data;
value = other.value;
}
}
};
} // namespace VM
} // namespace QQmlJS
QT_END_NAMESPACE
#endif
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