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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QVARIANT_H
#define QVARIANT_H
#include <QtCore/qatomic.h>
#include <QtCore/qbytearray.h>
#include <QtCore/qlist.h>
#include <QtCore/qmetatype.h>
#include <QtCore/qmap.h>
#include <QtCore/qhash.h>
#include <QtCore/qstring.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
class QBitArray;
class QDataStream;
class QDate;
class QDateTime;
class QLine;
class QLineF;
class QLocale;
class QMatrix;
class QTransform;
class QStringList;
class QTime;
class QPoint;
class QPointF;
class QSize;
class QSizeF;
class QRect;
class QRectF;
#ifndef QT_NO_REGEXP
class QRegExp;
#endif
class QTextFormat;
class QTextLength;
class QUrl;
class QVariant;
class QVariantComparisonHelper;
#ifndef QT_NO_MEMBER_TEMPLATES
template <typename T>
inline QVariant qVariantFromValue(const T &);
template <typename T>
inline void qVariantSetValue(QVariant &, const T &);
template<typename T>
inline T qVariantValue(const QVariant &);
template<typename T>
inline bool qVariantCanConvert(const QVariant &);
#endif
class Q_CORE_EXPORT QVariant
{
public:
enum Type {
Invalid = 0,
Bool = 1,
Int = 2,
UInt = 3,
LongLong = 4,
ULongLong = 5,
Double = 6,
Char = 7,
Map = 8,
List = 9,
String = 10,
StringList = 11,
ByteArray = 12,
BitArray = 13,
Date = 14,
Time = 15,
DateTime = 16,
Url = 17,
Locale = 18,
Rect = 19,
RectF = 20,
Size = 21,
SizeF = 22,
Line = 23,
LineF = 24,
Point = 25,
PointF = 26,
RegExp = 27,
Hash = 28,
LastCoreType = Hash,
// value 62 is internally reserved
#ifdef QT3_SUPPORT
ColorGroup = 63,
#endif
Font = 64,
Pixmap = 65,
Brush = 66,
Color = 67,
Palette = 68,
Icon = 69,
Image = 70,
Polygon = 71,
Region = 72,
Bitmap = 73,
Cursor = 74,
SizePolicy = 75,
KeySequence = 76,
Pen = 77,
TextLength = 78,
TextFormat = 79,
Matrix = 80,
Transform = 81,
Matrix4x4 = 82,
Vector2D = 83,
Vector3D = 84,
Vector4D = 85,
Quaternion = 86,
LastGuiType = Quaternion,
UserType = 127,
#ifdef QT3_SUPPORT
IconSet = Icon,
CString = ByteArray,
PointArray = Polygon,
#endif
LastType = 0xffffffff // need this so that gcc >= 3.4 allocates 32 bits for Type
};
inline QVariant();
~QVariant();
QVariant(Type type);
QVariant(int typeOrUserType, const void *copy);
QVariant(int typeOrUserType, const void *copy, uint flags);
QVariant(const QVariant &other);
#ifndef QT_NO_DATASTREAM
QVariant(QDataStream &s);
#endif
QVariant(int i);
QVariant(uint ui);
QVariant(qlonglong ll);
QVariant(qulonglong ull);
QVariant(bool b);
QVariant(double d);
QVariant(float f) { d.is_null = false; d.type = QMetaType::Float; d.data.f = f; }
#ifndef QT_NO_CAST_FROM_ASCII
QT_ASCII_CAST_WARN_CONSTRUCTOR QVariant(const char *str);
#endif
QVariant(const QByteArray &bytearray);
QVariant(const QBitArray &bitarray);
QVariant(const QString &string);
QVariant(const QLatin1String &string);
QVariant(const QStringList &stringlist);
QVariant(const QChar &qchar);
QVariant(const QDate &date);
QVariant(const QTime &time);
QVariant(const QDateTime &datetime);
QVariant(const QList<QVariant> &list);
QVariant(const QMap<QString,QVariant> &map);
QVariant(const QHash<QString,QVariant> &hash);
#ifndef QT_NO_GEOM_VARIANT
QVariant(const QSize &size);
QVariant(const QSizeF &size);
QVariant(const QPoint &pt);
QVariant(const QPointF &pt);
QVariant(const QLine &line);
QVariant(const QLineF &line);
QVariant(const QRect &rect);
QVariant(const QRectF &rect);
#endif
QVariant(const QUrl &url);
QVariant(const QLocale &locale);
#ifndef QT_NO_REGEXP
QVariant(const QRegExp ®Exp);
#endif
QVariant(Qt::GlobalColor color);
QVariant& operator=(const QVariant &other);
Type type() const;
int userType() const;
const char *typeName() const;
bool canConvert(Type t) const;
bool convert(Type t);
#ifdef QT3_SUPPORT
inline QT3_SUPPORT bool canCast(Type t) const
{ return canConvert(t); }
inline QT3_SUPPORT bool cast(Type t)
{ return convert(t); }
#endif
inline bool isValid() const;
bool isNull() const;
void clear();
void detach();
inline bool isDetached() const;
int toInt(bool *ok = 0) const;
uint toUInt(bool *ok = 0) const;
qlonglong toLongLong(bool *ok = 0) const;
qulonglong toULongLong(bool *ok = 0) const;
bool toBool() const;
double toDouble(bool *ok = 0) const;
float toFloat(bool *ok = 0) const;
qreal toReal(bool *ok = 0) const;
QByteArray toByteArray() const;
QBitArray toBitArray() const;
QString toString() const;
QStringList toStringList() const;
QChar toChar() const;
QDate toDate() const;
QTime toTime() const;
QDateTime toDateTime() const;
QList<QVariant> toList() const;
QMap<QString, QVariant> toMap() const;
QHash<QString, QVariant> toHash() const;
#ifndef QT_NO_GEOM_VARIANT
QPoint toPoint() const;
QPointF toPointF() const;
QRect toRect() const;
QSize toSize() const;
QSizeF toSizeF() const;
QLine toLine() const;
QLineF toLineF() const;
QRectF toRectF() const;
#endif
QUrl toUrl() const;
QLocale toLocale() const;
#ifndef QT_NO_REGEXP
QRegExp toRegExp() const;
#endif
#ifdef QT3_SUPPORT
inline QT3_SUPPORT int &asInt();
inline QT3_SUPPORT uint &asUInt();
inline QT3_SUPPORT qlonglong &asLongLong();
inline QT3_SUPPORT qulonglong &asULongLong();
inline QT3_SUPPORT bool &asBool();
inline QT3_SUPPORT double &asDouble();
inline QT3_SUPPORT QByteArray &asByteArray();
inline QT3_SUPPORT QBitArray &asBitArray();
inline QT3_SUPPORT QString &asString();
inline QT3_SUPPORT QStringList &asStringList();
inline QT3_SUPPORT QDate &asDate();
inline QT3_SUPPORT QTime &asTime();
inline QT3_SUPPORT QDateTime &asDateTime();
inline QT3_SUPPORT QList<QVariant> &asList();
inline QT3_SUPPORT QMap<QString,QVariant> &asMap();
inline QT3_SUPPORT QPoint &asPoint();
inline QT3_SUPPORT QRect &asRect();
inline QT3_SUPPORT QSize &asSize();
#endif //QT3_SUPPORT
#ifndef QT_NO_DATASTREAM
void load(QDataStream &ds);
void save(QDataStream &ds) const;
#endif
static const char *typeToName(Type type);
static Type nameToType(const char *name);
#ifdef QT3_SUPPORT
inline QT3_SUPPORT_CONSTRUCTOR QVariant(bool val, int) { create(Bool, &val); }
inline QT3_SUPPORT const QByteArray toCString() const { return toByteArray(); }
inline QT3_SUPPORT QByteArray &asCString() { return *reinterpret_cast<QByteArray *>(castOrDetach(ByteArray)); }
#endif
void *data();
const void *constData() const;
inline const void *data() const { return constData(); }
#ifndef QT_NO_MEMBER_TEMPLATES
template<typename T>
inline void setValue(const T &value);
template<typename T>
inline T value() const
{ return qVariantValue<T>(*this); }
template<typename T>
static inline QVariant fromValue(const T &value)
{ return qVariantFromValue(value); }
template<typename T>
bool canConvert() const
{ return qVariantCanConvert<T>(*this); }
#endif
public:
#ifndef qdoc
struct PrivateShared
{
inline PrivateShared(void *v) : ptr(v), ref(1) { }
void *ptr;
QAtomicInt ref;
};
struct Private
{
inline Private(): type(Invalid), is_shared(false), is_null(true) { data.ptr = 0; }
inline Private(const Private &other)
: data(other.data), type(other.type),
is_shared(other.is_shared), is_null(other.is_null)
{}
union Data
{
char c;
int i;
uint u;
bool b;
double d;
float f;
qreal real;
qlonglong ll;
qulonglong ull;
QObject *o;
void *ptr;
PrivateShared *shared;
} data;
uint type : 30;
uint is_shared : 1;
uint is_null : 1;
};
public:
typedef void (*f_construct)(Private *, const void *);
typedef void (*f_clear)(Private *);
typedef bool (*f_null)(const Private *);
#ifndef QT_NO_DATASTREAM
typedef void (*f_load)(Private *, QDataStream &);
typedef void (*f_save)(const Private *, QDataStream &);
#endif
typedef bool (*f_compare)(const Private *, const Private *);
typedef bool (*f_convert)(const QVariant::Private *d, Type t, void *, bool *);
typedef bool (*f_canConvert)(const QVariant::Private *d, Type t);
typedef void (*f_debugStream)(QDebug, const QVariant &);
struct Handler {
f_construct construct;
f_clear clear;
f_null isNull;
#ifndef QT_NO_DATASTREAM
f_load load;
f_save save;
#endif
f_compare compare;
f_convert convert;
f_canConvert canConvert;
f_debugStream debugStream;
};
#endif
inline bool operator==(const QVariant &v) const
{ return cmp(v); }
inline bool operator!=(const QVariant &v) const
{ return !cmp(v); }
protected:
friend inline bool qvariant_cast_helper(const QVariant &, QVariant::Type, void *);
friend int qRegisterGuiVariant();
friend int qUnregisterGuiVariant();
friend inline bool operator==(const QVariant &, const QVariantComparisonHelper &);
#ifndef QT_NO_DEBUG_STREAM
friend Q_CORE_EXPORT QDebug operator<<(QDebug, const QVariant &);
#endif
Private d;
static const Handler *handler;
void create(int type, const void *copy);
#ifdef QT3_SUPPORT
void *castOrDetach(Type t);
#endif
bool cmp(const QVariant &other) const;
private:
// force compile error, prevent QVariant(bool) to be called
inline QVariant(void *) { Q_ASSERT(false); }
#ifdef QT_NO_CAST_FROM_ASCII
// force compile error when implicit conversion is not wanted
inline QVariant(const char *) { Q_ASSERT(false); }
#endif
#ifndef QT3_SUPPORT
// force compile error, prevent QVariant(QVariant::Type, int) to be called
inline QVariant(bool, int) { Q_ASSERT(false); }
#endif
public:
typedef Private DataPtr;
inline DataPtr &data_ptr() { return d; }
};
typedef QList<QVariant> QVariantList;
typedef QMap<QString, QVariant> QVariantMap;
typedef QHash<QString, QVariant> QVariantHash;
inline bool qvariant_cast_helper(const QVariant &v, QVariant::Type tp, void *ptr)
{ return QVariant::handler->convert(&v.d, tp, ptr, 0); }
template <typename T>
inline QVariant qVariantFromValue(const T &t)
{
return QVariant(qMetaTypeId<T>(reinterpret_cast<T *>(0)), &t, QTypeInfo<T>::isPointer);
}
template <>
inline QVariant qVariantFromValue(const QVariant &t) { return t; }
template <typename T>
inline void qVariantSetValue(QVariant &v, const T &t)
{
//if possible we reuse the current QVariant private
const uint type = qMetaTypeId<T>(reinterpret_cast<T *>(0));
QVariant::Private &d = v.data_ptr();
if (v.isDetached() && (type == d.type || (type <= uint(QVariant::Char) && d.type <= uint(QVariant::Char)))) {
d.type = type;
d.is_null = false;
T *old = reinterpret_cast<T*>(d.is_shared ? d.data.shared->ptr : &d.data.ptr);
if (QTypeInfo<T>::isComplex)
old->~T();
new (old) T(t); //call the copy constructor
} else {
v = QVariant(type, &t, QTypeInfo<T>::isPointer);
}
}
template <>
inline void qVariantSetValue<QVariant>(QVariant &v, const QVariant &t)
{
v = t;
}
inline QVariant::QVariant() {}
inline bool QVariant::isValid() const { return d.type != Invalid; }
#ifdef QT3_SUPPORT
inline int &QVariant::asInt()
{ return *reinterpret_cast<int *>(castOrDetach(Int)); }
inline uint &QVariant::asUInt()
{ return *reinterpret_cast<uint *>(castOrDetach(UInt)); }
inline qlonglong &QVariant::asLongLong()
{ return *reinterpret_cast<qlonglong *>(castOrDetach(LongLong)); }
inline qulonglong &QVariant::asULongLong()
{ return *reinterpret_cast<qulonglong *>(castOrDetach(ULongLong)); }
inline bool &QVariant::asBool()
{ return *reinterpret_cast<bool *>(castOrDetach(Bool)); }
inline double &QVariant::asDouble()
{ return *reinterpret_cast<double *>(castOrDetach(Double)); }
inline QByteArray& QVariant::asByteArray()
{ return *reinterpret_cast<QByteArray *>(castOrDetach(ByteArray)); }
inline QBitArray& QVariant::asBitArray()
{ return *reinterpret_cast<QBitArray *>(castOrDetach(BitArray)); }
inline QString& QVariant::asString()
{ return *reinterpret_cast<QString *>(castOrDetach(String)); }
inline QStringList& QVariant::asStringList()
{ return *reinterpret_cast<QStringList *>(castOrDetach(StringList)); }
inline QDate& QVariant::asDate()
{ return *reinterpret_cast<QDate *>(castOrDetach(Date)); }
inline QTime& QVariant::asTime()
{ return *reinterpret_cast<QTime *>(castOrDetach(Time)); }
inline QDateTime& QVariant::asDateTime()
{ return *reinterpret_cast<QDateTime *>(castOrDetach(DateTime)); }
inline QList<QVariant>& QVariant::asList()
{ return *reinterpret_cast<QList<QVariant> *>(castOrDetach(List)); }
inline QMap<QString, QVariant>& QVariant::asMap()
{ return *reinterpret_cast<QMap<QString, QVariant> *>(castOrDetach(Map)); }
inline QPoint &QVariant::asPoint()
{ return *reinterpret_cast<QPoint *>(castOrDetach(Point)); }
inline QRect &QVariant::asRect()
{ return *reinterpret_cast<QRect *>(castOrDetach(Rect)); }
inline QSize &QVariant::asSize()
{ return *reinterpret_cast<QSize *>(castOrDetach(Size)); }
#endif //QT3_SUPPORT
#ifndef QT_NO_MEMBER_TEMPLATES
template<typename T>
inline void QVariant::setValue(const T &avalue)
{ qVariantSetValue(*this, avalue); }
#endif
#ifndef QT_NO_DATASTREAM
Q_CORE_EXPORT QDataStream& operator>> (QDataStream& s, QVariant& p);
Q_CORE_EXPORT QDataStream& operator<< (QDataStream& s, const QVariant& p);
Q_CORE_EXPORT QDataStream& operator>> (QDataStream& s, QVariant::Type& p);
Q_CORE_EXPORT QDataStream& operator<< (QDataStream& s, const QVariant::Type p);
#endif
inline bool QVariant::isDetached() const
{ return !d.is_shared || d.data.shared->ref == 1; }
#ifdef qdoc
inline bool operator==(const QVariant &v1, const QVariant &v2);
inline bool operator!=(const QVariant &v1, const QVariant &v2);
#else
/* Helper class to add one more level of indirection to prevent
implicit casts.
*/
class QVariantComparisonHelper
{
public:
inline QVariantComparisonHelper(const QVariant &var)
: v(&var) {}
private:
friend inline bool operator==(const QVariant &, const QVariantComparisonHelper &);
const QVariant *v;
};
inline bool operator==(const QVariant &v1, const QVariantComparisonHelper &v2)
{
return v1.cmp(*v2.v);
}
inline bool operator!=(const QVariant &v1, const QVariantComparisonHelper &v2)
{
return !operator==(v1, v2);
}
#endif
#ifndef QT_MOC
template<typename T> inline T qvariant_cast(const QVariant &v)
{
const int vid = qMetaTypeId<T>(static_cast<T *>(0));
if (vid == v.userType())
return *reinterpret_cast<const T *>(v.constData());
if (vid < int(QMetaType::User)) {
T t;
if (qvariant_cast_helper(v, QVariant::Type(vid), &t))
return t;
}
return T();
}
template<> inline QVariant qvariant_cast<QVariant>(const QVariant &v)
{
static const int vid = qRegisterMetaType<QVariant>("QVariant");
if (vid == v.userType())
return *reinterpret_cast<const QVariant *>(v.constData());
return v;
}
template<typename T>
inline T qVariantValue(const QVariant &variant)
{ return qvariant_cast<T>(variant); }
template<typename T>
inline bool qVariantCanConvert(const QVariant &variant)
{
return variant.canConvert(static_cast<QVariant::Type>(
qMetaTypeId<T>(static_cast<T *>(0))));
}
#endif
Q_DECLARE_SHARED(QVariant)
Q_DECLARE_TYPEINFO(QVariant, Q_MOVABLE_TYPE);
#ifndef QT_NO_DEBUG_STREAM
Q_CORE_EXPORT QDebug operator<<(QDebug, const QVariant &);
Q_CORE_EXPORT QDebug operator<<(QDebug, const QVariant::Type);
#endif
QT_END_NAMESPACE
Q_DECLARE_BUILTIN_METATYPE(QVariantList, QVariantList)
Q_DECLARE_BUILTIN_METATYPE(QVariantMap, QVariantMap)
Q_DECLARE_BUILTIN_METATYPE(QVariantHash, QVariantHash)
QT_END_HEADER
#endif // QVARIANT_H
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