/****************************************************************************

**

** Copyright (C) 2012 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.

**

** $QT_BEGIN_LICENSE:LGPL$

** GNU Lesser General Public License Usage

** 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.

**

** Other Usage

** Alternatively, this file may be used in accordance with the terms and

** conditions contained in a signed written agreement between you and Nokia.

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "qmetaobject.h"

#include "qmetatype.h"

#include "qobject.h"

#include <qcoreapplication.h>

#include <qcoreevent.h>

#include <qdatastream.h>

#include <qstringlist.h>

#include <qthread.h>

#include <qvarlengtharray.h>

#include <qvariant.h>

#include <qhash.h>

#include <qdebug.h>

#include <qsemaphore.h>

#include "private/qobject_p.h"

#include "private/qmetaobject_p.h"

#include <ctype.h>

QT_BEGIN_NAMESPACE

/*!

    \class QMetaObject

    \brief The QMetaObject class contains meta-information about Qt

    objects.

    \ingroup objectmodel

    The Qt \l{Meta-Object System} in Qt is responsible for the

    signals and slots inter-object communication mechanism, runtime

    type information, and the Qt property system. A single

    QMetaObject instance is created for each QObject subclass that is

    used in an application, and this instance stores all the

    meta-information for the QObject subclass. This object is

    available as QObject::metaObject().

    This class is not normally required for application programming,

    but it is useful if you write meta-applications, such as scripting

    engines or GUI builders.

    The functions you are most likely to find useful are these:

    \list

    \o className() returns the name of a class.

    \o superClass() returns the superclass's meta-object.

    \o method() and methodCount() provide information

       about a class's meta-methods (signals, slots and other

       \l{Q_INVOKABLE}{invokable} member functions).

    \o enumerator() and enumeratorCount() and provide information about

       a class's enumerators.

    \o propertyCount() and property() provide information about a

       class's properties.

    \o constructor() and constructorCount() provide information

       about a class's meta-constructors.

    \endlist

    The index functions indexOfConstructor(), indexOfMethod(),

    indexOfEnumerator(), and indexOfProperty() map names of constructors,

    member functions, enumerators, or properties to indexes in the

    meta-object. For example, Qt uses indexOfMethod() internally when you

    connect a signal to a slot.

    Classes can also have a list of \e{name}--\e{value} pairs of

    additional class information, stored in QMetaClassInfo objects.

    The number of pairs is returned by classInfoCount(), single pairs

    are returned by classInfo(), and you can search for pairs with

    indexOfClassInfo().

    \sa QMetaClassInfo, QMetaEnum, QMetaMethod, QMetaProperty, QMetaType,

        {Meta-Object System}

*/

/*!

    \enum QMetaObject::Call

    \internal

    \value InvokeSlot

    \value EmitSignal

    \value ReadProperty

    \value WriteProperty

    \value ResetProperty

    \value QueryPropertyDesignable

    \value QueryPropertyScriptable

    \value QueryPropertyStored

    \value QueryPropertyEditable

    \value QueryPropertyUser

    \value CreateInstance

*/

/*!

    \enum QMetaMethod::Access

    This enum describes the access level of a method, following the conventions used in C++.

    \value Private

    \value Protected

    \value Public

*/

static inline const QMetaObjectPrivate *priv(const uint* data)

{ return reinterpret_cast<const QMetaObjectPrivate*>(data); }

/*!

    \since 4.5

    Constructs a new instance of this class. You can pass up to ten arguments

    (\a val0, \a val1, \a val2, \a val3, \a val4, \a val5, \a val6, \a val7,

    \a val8, and \a val9) to the constructor. Returns the new object, or 0 if

    no suitable constructor is available.

    Note that only constructors that are declared with the Q_INVOKABLE

    modifier are made available through the meta-object system.

    \sa Q_ARG(), constructor()

*/

QObject *QMetaObject::newInstance(QGenericArgument val0,

                                  QGenericArgument val1,

                                  QGenericArgument val2,

                                  QGenericArgument val3,

                                  QGenericArgument val4,

                                  QGenericArgument val5,

                                  QGenericArgument val6,

                                  QGenericArgument val7,

                                  QGenericArgument val8,

                                  QGenericArgument val9) const

{

    QByteArray constructorName = className();

    {

        int idx = constructorName.lastIndexOf(':');

        if (idx != -1)

            constructorName.remove(0, idx+1); // remove qualified part

    }

    QVarLengthArray<char, 512> sig;

    sig.append(constructorName.constData(), constructorName.length());

    sig.append('(');

    enum { MaximumParamCount = 10 };

    const char *typeNames[] = {val0.name(), val1.name(), val2.name(), val3.name(), val4.name(),

                               val5.name(), val6.name(), val7.name(), val8.name(), val9.name()};

    int paramCount;

    for (paramCount = 0; paramCount < MaximumParamCount; ++paramCount) {

        int len = qstrlen(typeNames[paramCount]);

        if (len <= 0)

            break;

        sig.append(typeNames[paramCount], len);

        sig.append(',');

    }

    if (paramCount == 0)

        sig.append(')'); // no parameters

    else

        sig[sig.size() - 1] = ')';

    sig.append('\0');

    int idx = indexOfConstructor(sig.constData());

    if (idx < 0) {

        QByteArray norm = QMetaObject::normalizedSignature(sig.constData());

        idx = indexOfConstructor(norm.constData());

    }

    if (idx < 0)

        return 0;

    QVariant ret(QMetaType::QObjectStar, (void*)0);

    void *param[] = {ret.data(), val0.data(), val1.data(), val2.data(), val3.data(), val4.data(),

                     val5.data(), val6.data(), val7.data(), val8.data(), val9.data()};

    if (static_metacall(CreateInstance, idx, param) >= 0)

        return 0;

    return *reinterpret_cast<QObject**>(param[0]);

}

/*!

    \internal

*/

int QMetaObject::static_metacall(Call cl, int idx, void **argv) const

{

    const QMetaObjectExtraData *extra = reinterpret_cast<const QMetaObjectExtraData *>(d.extradata);

    if (priv(d.data)->revision >= 6) {

        if (!extra || !extra->static_metacall)

            return 0;

        extra->static_metacall(0, cl, idx, argv);

        return -1;

    } else if (priv(d.data)->revision >= 2) {

        if (!extra || !extra->static_metacall)

            return 0;

        typedef int (*OldMetacall)(QMetaObject::Call, int, void **);

        OldMetacall o = reinterpret_cast<OldMetacall>(extra->static_metacall);

        return o(cl, idx, argv);

    }

    return 0;

}

/*!

    \internal

*/

int QMetaObject::metacall(QObject *object, Call cl, int idx, void **argv)

{

    if (QMetaObject *mo = object->d_ptr->metaObject)

        return static_cast<QAbstractDynamicMetaObject*>(mo)->metaCall(cl, idx, argv);

    else

        return object->qt_metacall(cl, idx, argv);

}

/*!

    \fn const char *QMetaObject::className() const

    Returns the class name.

    \sa superClass()

*/

/*!

    \fn QMetaObject *QMetaObject::superClass() const

    Returns the meta-object of the superclass, or 0 if there is no

    such object.

    \sa className()

*/

/*!

    \internal

    Returns \a obj if object \a obj inherits from this

    meta-object; otherwise returns 0.

*/

QObject *QMetaObject::cast(QObject *obj) const

{

    if (obj) {

        const QMetaObject *m = obj->metaObject();

        do {

            if (m == this)

                return obj;

        } while ((m = m->d.superdata));

    }

    return 0;

}

/*!

    \internal

    Returns \a obj if object \a obj inherits from this

    meta-object; otherwise returns 0.

*/

const QObject *QMetaObject::cast(const QObject *obj) const

{

    if (obj) {

        const QMetaObject *m = obj->metaObject();

        do {

            if (m == this)

                return obj;

        } while ((m = m->d.superdata));

    }

    return 0;

}

#ifndef QT_NO_TRANSLATION

/*!

    \internal

*/

QString QMetaObject::tr(const char *s, const char *c) const

{

    return QCoreApplication::translate(d.stringdata, s, c, QCoreApplication::CodecForTr);

}

/*!

    \internal

*/

QString QMetaObject::tr(const char *s, const char *c, int n) const

{

    return QCoreApplication::translate(d.stringdata, s, c, QCoreApplication::CodecForTr, n);

}

/*!

    \internal

*/

QString QMetaObject::trUtf8(const char *s, const char *c) const

{

    return QCoreApplication::translate(d.stringdata, s, c, QCoreApplication::UnicodeUTF8);

}

/*!

    \internal

*/

QString QMetaObject::trUtf8(const char *s, const char *c, int n) const

{

    return QCoreApplication::translate(d.stringdata, s, c, QCoreApplication::UnicodeUTF8, n);

}

#endif // QT_NO_TRANSLATION

/*!

    Returns the method offset for this class; i.e. the index position

    of this class's first member function.

    The offset is the sum of all the methods in the class's

    superclasses (which is always positive since QObject has the

    deleteLater() slot and a destroyed() signal).

    \sa method(), methodCount(), indexOfMethod()

*/

int QMetaObject::methodOffset() const

{

    int offset = 0;

    const QMetaObject *m = d.superdata;

    while (m) {

        offset += priv(m->d.data)->methodCount;

        m = m->d.superdata;

    }

    return offset;

}

/*!

    Returns the enumerator offset for this class; i.e. the index

    position of this class's first enumerator.

    If the class has no superclasses with enumerators, the offset is

    0; otherwise the offset is the sum of all the enumerators in the

    class's superclasses.

    \sa enumerator(), enumeratorCount(), indexOfEnumerator()

*/

int QMetaObject::enumeratorOffset() const

{

    int offset = 0;

    const QMetaObject *m = d.superdata;

    while (m) {

        offset += priv(m->d.data)->enumeratorCount;

        m = m->d.superdata;

    }

    return offset;

}

/*!

    Returns the property offset for this class; i.e. the index

    position of this class's first property.

    The offset is the sum of all the properties in the class's

    superclasses (which is always positive since QObject has the

    name() property).

    \sa property(), propertyCount(), indexOfProperty()

*/

int QMetaObject::propertyOffset() const

{

    int offset = 0;

    const QMetaObject *m = d.superdata;

    while (m) {

        offset += priv(m->d.data)->propertyCount;

        m = m->d.superdata;

    }

    return offset;

}

/*!

    Returns the class information offset for this class; i.e. the

    index position of this class's first class information item.

    If the class has no superclasses with class information, the

    offset is 0; otherwise the offset is the sum of all the class

    information items in the class's superclasses.

    \sa classInfo(), classInfoCount(), indexOfClassInfo()

*/

int QMetaObject::classInfoOffset() const

{

    int offset = 0;

    const QMetaObject *m = d.superdata;

    while (m) {

        offset += priv(m->d.data)->classInfoCount;

        m = m->d.superdata;

    }

    return offset;

}

/*!

    \since 4.5

    Returns the number of constructors in this class.

    \sa constructor(), indexOfConstructor()

*/

int QMetaObject::constructorCount() const

{

    if (priv(d.data)->revision < 2)

        return 0;

    return priv(d.data)->constructorCount;

}

/*!

    Returns the number of methods known to the meta-object system in this class,

    including the number of properties provided by each base class. These

    include signals and slots as well as member functions declared with the

    Q_INVOKABLE macro.

    Use code like the following to obtain a QStringList containing the methods

    specific to a given class:

    \snippet doc/src/snippets/code/src_corelib_kernel_qmetaobject.cpp methodCount

    \sa method(), methodOffset(), indexOfMethod()

*/

int QMetaObject::methodCount() const

{

    int n = priv(d.data)->methodCount;

    const QMetaObject *m = d.superdata;

    while (m) {

        n += priv(m->d.data)->methodCount;

        m = m->d.superdata;

    }

    return n;

}

/*!

    Returns the number of enumerators in this class.

    \sa enumerator(), enumeratorOffset(), indexOfEnumerator()

*/

int QMetaObject::enumeratorCount() const

{

    int n = priv(d.data)->enumeratorCount;

    const QMetaObject *m = d.superdata;

    while (m) {

        n += priv(m->d.data)->enumeratorCount;

        m = m->d.superdata;

    }

    return n;

}

/*!

    Returns the number of properties in this class, including the number of

    properties provided by each base class.

    Use code like the following to obtain a QStringList containing the properties

    specific to a given class:

    \snippet doc/src/snippets/code/src_corelib_kernel_qmetaobject.cpp propertyCount

    \sa property(), propertyOffset(), indexOfProperty()

*/

int QMetaObject::propertyCount() const

{

    int n = priv(d.data)->propertyCount;

    const QMetaObject *m = d.superdata;

    while (m) {

        n += priv(m->d.data)->propertyCount;

        m = m->d.superdata;

    }

    return n;

}

/*!

    Returns the number of items of class information in this class.

    \sa classInfo(), classInfoOffset(), indexOfClassInfo()

*/

int QMetaObject::classInfoCount() const

{

    int n = priv(d.data)->classInfoCount;

    const QMetaObject *m = d.superdata;

    while (m) {

        n += priv(m->d.data)->classInfoCount;

        m = m->d.superdata;

    }

    return n;

}

/** \internal

* helper function for indexOf{Method,Slot,Signal}, returns the relative index of the method within

* the baseObject

* \a MethodType might be MethodSignal or MethodSlot, or 0 to match everything.

* \a normalizeStringData set to true if we should do a second pass for old moc generated files normalizing all the symbols.

*/

template<int MethodType>

static inline int indexOfMethodRelative(const QMetaObject **baseObject,

                                        const char *method,

                                        bool normalizeStringData)

{

    for (const QMetaObject *m = *baseObject; m; m = m->d.superdata) {

        int i = (MethodType == MethodSignal && priv(m->d.data)->revision >= 4)

                ? (priv(m->d.data)->signalCount - 1) : (priv(m->d.data)->methodCount - 1);

        const int end = (MethodType == MethodSlot && priv(m->d.data)->revision >= 4)

                        ? (priv(m->d.data)->signalCount) : 0;

        if (!normalizeStringData) {

            for (; i >= end; --i) {

                const char *stringdata = m->d.stringdata + m->d.data[priv(m->d.data)->methodData + 5*i];

                if (method[0] == stringdata[0] && strcmp(method + 1, stringdata + 1) == 0) {

                    *baseObject = m;

                    return i;

                }

            }

        } else if (priv(m->d.data)->revision < 5) {

            for (; i >= end; --i) {

                const char *stringdata = (m->d.stringdata + m->d.data[priv(m->d.data)->methodData + 5 * i]);

                const QByteArray normalizedSignature = QMetaObject::normalizedSignature(stringdata);

                if (normalizedSignature == method) {

                    *baseObject = m;

                    return i;

                }

            }

        }

    }

    return -1;

}

/*!

    \since 4.5

    Finds \a constructor and returns its index; otherwise returns -1.

    Note that the \a constructor has to be in normalized form, as returned

    by normalizedSignature().

    \sa constructor(), constructorCount(), normalizedSignature()

*/

int QMetaObject::indexOfConstructor(const char *constructor) const

{

    if (priv(d.data)->revision < 2)

        return -1;

    for (int i = priv(d.data)->constructorCount-1; i >= 0; --i) {

        const char *data = d.stringdata + d.data[priv(d.data)->constructorData + 5*i];

        if (data[0] == constructor[0] && strcmp(constructor + 1, data + 1) == 0) {

            return i;

        }

    }

    return -1;

}

/*!

    Finds \a method and returns its index; otherwise returns -1.

    Note that the \a method has to be in normalized form, as returned

    by normalizedSignature().

    \sa method(), methodCount(), methodOffset(), normalizedSignature()

*/

int QMetaObject::indexOfMethod(const char *method) const

{

    const QMetaObject *m = this;

    int i = indexOfMethodRelative<0>(&m, method, false);

    if (i < 0) {

        m = this;

        i = indexOfMethodRelative<0>(&m, method, true);

    }

    if (i >= 0)

        i += m->methodOffset();

    return i;

}

/*!

    Finds \a signal and returns its index; otherwise returns -1.

    This is the same as indexOfMethod(), except that it will return

    -1 if the method exists but isn't a signal.

    Note that the \a signal has to be in normalized form, as returned

    by normalizedSignature().

    \sa indexOfMethod(), normalizedSignature(), method(), methodCount(), methodOffset()

*/

int QMetaObject::indexOfSignal(const char *signal) const

{

    const QMetaObject *m = this;

    int i = QMetaObjectPrivate::indexOfSignalRelative(&m, signal, false);

    if (i < 0) {

        m = this;

        i = QMetaObjectPrivate::indexOfSignalRelative(&m, signal, true);

    }

    if (i >= 0)

        i += m->methodOffset();

    return i;

}

/*! \internal

    Same as QMetaObject::indexOfSignal, but the result is the local offset to the base object.

    \a baseObject will be adjusted to the enclosing QMetaObject, or 0 if the signal is not found

*/

int QMetaObjectPrivate::indexOfSignalRelative(const QMetaObject **baseObject,

                                              const char *signal,

                                              bool normalizeStringData)

{

    int i = indexOfMethodRelative<MethodSignal>(baseObject, signal, normalizeStringData);

#ifndef QT_NO_DEBUG

    const QMetaObject *m = *baseObject;

    if (i >= 0 && m && m->d.superdata) {

        int conflict = m->d.superdata->indexOfMethod(signal);

        if (conflict >= 0)

            qWarning("QMetaObject::indexOfSignal: signal %s from %s redefined in %s",

                     signal, m->d.superdata->d.stringdata, m->d.stringdata);

    }

#endif

    return i;

}

/*!

    Finds \a slot and returns its index; otherwise returns -1.

    This is the same as indexOfMethod(), except that it will return

    -1 if the method exists but isn't a slot.

    \sa indexOfMethod(), method(), methodCount(), methodOffset()

*/

int QMetaObject::indexOfSlot(const char *slot) const

{

    const QMetaObject *m = this;

    int i = QMetaObjectPrivate::indexOfSlotRelative(&m, slot, false);

    if (i < 0)

        i = QMetaObjectPrivate::indexOfSlotRelative(&m, slot, true);

    if (i >= 0)

        i += m->methodOffset();

    return i;

}

// same as indexOfSignalRelative but for slots.

int QMetaObjectPrivate::indexOfSlotRelative(const QMetaObject **m,

                                    const char *slot,

                                    bool normalizeStringData)

{

    return indexOfMethodRelative<MethodSlot>(m, slot, normalizeStringData);

}

static const QMetaObject *QMetaObject_findMetaObject(const QMetaObject *self, const char *name)

{

    while (self) {

        if (strcmp(self->d.stringdata, name) == 0)

            return self;

        if (self->d.extradata) {

#ifdef Q_NO_DATA_RELOCATION

            const QMetaObjectAccessor *e;

            Q_ASSERT(priv(self->d.data)->revision >= 2);

#else

            const QMetaObject **e;

            if (priv(self->d.data)->revision < 2) {

                e = (const QMetaObject**)(self->d.extradata);

            } else

#endif

            {

                const QMetaObjectExtraData *extra = (const QMetaObjectExtraData*)(self->d.extradata);

                e = extra->objects;

            }

            if (e) {

                while (*e) {

#ifdef Q_NO_DATA_RELOCATION

                    if (const QMetaObject *m =QMetaObject_findMetaObject(&((*e)()), name))

#else

                    if (const QMetaObject *m =QMetaObject_findMetaObject((*e), name))

#endif

                        return m;

                    ++e;

                }

            }

        }

        self = self->d.superdata;

    }

    return self;

}

/*!

    Finds enumerator \a name and returns its index; otherwise returns

    -1.

    \sa enumerator(), enumeratorCount(), enumeratorOffset()

*/

int QMetaObject::indexOfEnumerator(const char *name) const

{

    const QMetaObject *m = this;

    while (m) {

        const QMetaObjectPrivate *d = priv(m->d.data);

        for (int i = d->enumeratorCount - 1; i >= 0; --i) {

            const char *prop = m->d.stringdata + m->d.data[d->enumeratorData + 4*i];

            if (name[0] == prop[0] && strcmp(name + 1, prop + 1) == 0) {

                i += m->enumeratorOffset();

                return i;

            }

        }

        m = m->d.superdata;

    }

    return -1;

}

/*!

    Finds property \a name and returns its index; otherwise returns

    -1.

    \sa property(), propertyCount(), propertyOffset()

*/

int QMetaObject::indexOfProperty(const char *name) const

{

    const QMetaObject *m = this;

    while (m) {

        const QMetaObjectPrivate *d = priv(m->d.data);

        for (int i = d->propertyCount-1; i >= 0; --i) {

            const char *prop = m->d.stringdata + m->d.data[d->propertyData + 3*i];

            if (name[0] == prop[0] && strcmp(name + 1, prop + 1) == 0) {

                i += m->propertyOffset();

                return i;

            }

        }

        m = m->d.superdata;

    }

    if (priv(this->d.data)->revision >= 3 && (priv(this->d.data)->flags & DynamicMetaObject)) {

        QAbstractDynamicMetaObject *me = 

            const_cast<QAbstractDynamicMetaObject *>(static_cast<const QAbstractDynamicMetaObject *>(this));

        return me->createProperty(name, 0);

    }

    return -1;

}

/*!

    Finds class information item \a name and returns its index;

    otherwise returns -1.

    \sa classInfo(), classInfoCount(), classInfoOffset()

*/

int QMetaObject::indexOfClassInfo(const char *name) const

{

    int i = -1;

    const QMetaObject *m = this;

    while (m && i < 0) {

        for (i = priv(m->d.data)->classInfoCount-1; i >= 0; --i)

            if (strcmp(name, m->d.stringdata

                       + m->d.data[priv(m->d.data)->classInfoData + 2*i]) == 0) {

                i += m->classInfoOffset();

                break;

            }

        m = m->d.superdata;

    }

    return i;

}

/*!

    \since 4.5

    Returns the meta-data for the constructor with the given \a index.

    \sa constructorCount(), newInstance()

*/

QMetaMethod QMetaObject::constructor(int index) const

{

    int i = index;

    QMetaMethod result;

    if (priv(d.data)->revision >= 2 && i >= 0 && i < priv(d.data)->constructorCount) {

        result.mobj = this;

        result.handle = priv(d.data)->constructorData + 5*i;

    }

    return result;

}

/*!

    Returns the meta-data for the method with the given \a index.

    \sa methodCount(), methodOffset(), indexOfMethod()

*/

QMetaMethod QMetaObject::method(int index) const

{

    int i = index;

    i -= methodOffset();

    if (i < 0 && d.superdata)

        return d.superdata->method(index);

    QMetaMethod result;

    if (i >= 0 && i < priv(d.data)->methodCount) {

        result.mobj = this;

        result.handle = priv(d.data)->methodData + 5*i;

    }

    return result;

}

/*!

    Returns the meta-data for the enumerator with the given \a index.

    \sa enumeratorCount(), enumeratorOffset(), indexOfEnumerator()

*/

QMetaEnum QMetaObject::enumerator(int index) const

{

    int i = index;

    i -= enumeratorOffset();

    if (i < 0 && d.superdata)

        return d.superdata->enumerator(index);

    QMetaEnum result;

    if (i >= 0 && i < priv(d.data)->enumeratorCount) {

        result.mobj = this;

        result.handle = priv(d.data)->enumeratorData + 4*i;

    }

    return result;

}

/*!

    Returns the meta-data for the property with the given \a index.

    If no such property exists, a null QMetaProperty is returned.

    \sa propertyCount(), propertyOffset(), indexOfProperty()

*/

QMetaProperty QMetaObject::property(int index) const

{

    int i = index;

    i -= propertyOffset();

    if (i < 0 && d.superdata)

        return d.superdata->property(index);

    QMetaProperty result;

    if (i >= 0 && i < priv(d.data)->propertyCount) {

        int handle = priv(d.data)->propertyData + 3*i;

        int flags = d.data[handle + 2];

        const char *type = d.stringdata + d.data[handle + 1];

        result.mobj = this;

        result.handle = handle;

        result.idx = i;

        if (flags & EnumOrFlag) {

            result.menum = enumerator(indexOfEnumerator(type));

            if (!result.menum.isValid()) {

                QByteArray enum_name = type;

                QByteArray scope_name = d.stringdata;

                int s = enum_name.lastIndexOf("::");

                if (s > 0) {

                    scope_name = enum_name.left(s);

                    enum_name = enum_name.mid(s + 2);

                }

                const QMetaObject *scope = 0;

                if (scope_name == "Qt")

                    scope = &QObject::staticQtMetaObject;

                else

                    scope = QMetaObject_findMetaObject(this, scope_name);

                if (scope)

                    result.menum = scope->enumerator(scope->indexOfEnumerator(enum_name));

            }

        }

    }

    return result;

}

/*!

    \since 4.2

    Returns the property that has the \c USER flag set to true.

    \sa QMetaProperty::isUser()

*/

QMetaProperty QMetaObject::userProperty() const

{

    const int propCount = propertyCount();

    for (int i = propCount - 1; i >= 0; --i) {

        const QMetaProperty prop = property(i);

        if (prop.isUser())

            return prop;

    }

    return QMetaProperty();

}

/*!

    Returns the meta-data for the item of class information with the

    given \a index.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qmetaobject.cpp 0

    \sa classInfoCount(), classInfoOffset(), indexOfClassInfo()

 */

QMetaClassInfo QMetaObject::classInfo(int index) const

{

    int i = index;

    i -= classInfoOffset();

    if (i < 0 && d.superdata)

        return d.superdata->classInfo(index);

    QMetaClassInfo result;

    if (i >= 0 && i < priv(d.data)->classInfoCount) {

        result.mobj = this;

        result.handle = priv(d.data)->classInfoData + 2*i;

    }

    return result;

}

/*!

    Returns true if the \a signal and \a method arguments are

    compatible; otherwise returns false.

    Both \a signal and \a method are expected to be normalized.

    \sa normalizedSignature()

*/

bool QMetaObject::checkConnectArgs(const char *signal, const char *method)

{

    const char *s1 = signal;

    const char *s2 = method;

    while (*s1++ != '(') { }                        // scan to first '('

    while (*s2++ != '(') { }

    if (*s2 == ')' || qstrcmp(s1,s2) == 0)        // method has no args or

        return true;                                //   exact match

    int s1len = qstrlen(s1);

    int s2len = qstrlen(s2);

    if (s2len < s1len && strncmp(s1,s2,s2len-1)==0 && s1[s2len-1]==',')

        return true;                                // method has less args

    return false;

}

static void qRemoveWhitespace(const char *s, char *d)

{

    char last = 0;

    while (*s && is_space(*s))

        s++;

    while (*s) {

        while (*s && !is_space(*s))

            last = *d++ = *s++;

        while (*s && is_space(*s))

            s++;

        if (*s && ((is_ident_char(*s) && is_ident_char(last))

                   || ((*s == ':') && (last == '<')))) {

            last = *d++ = ' ';

        }

    }

    *d = '\0';

}

static char *qNormalizeType(char *d, int &templdepth, QByteArray &result)

{

    const char *t = d;

    while (*d && (templdepth

                   || (*d != ',' && *d != ')'))) {

        if (*d == '<')

            ++templdepth;

        if (*d == '>')

            --templdepth;

        ++d;

    }

    if (strncmp("void", t, d - t) != 0)

        result += normalizeTypeInternal(t, d);

    return d;

}

/*!

    \since 4.2

    Normalizes a \a type.

    See QMetaObject::normalizedSignature() for a description on how

    Qt normalizes.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qmetaobject.cpp 1

    \sa normalizedSignature()

 */

QByteArray QMetaObject::normalizedType(const char *type)

{

    QByteArray result;

    if (!type || !*type)

        return result;

    QVarLengthArray<char> stackbuf(qstrlen(type) + 1);

    qRemoveWhitespace(type, stackbuf.data());

    int templdepth = 0;

    qNormalizeType(stackbuf.data(), templdepth, result);

    return result;

}

/*!

    Normalizes the signature of the given \a method.

    Qt uses normalized signatures to decide whether two given signals

    and slots are compatible. Normalization reduces whitespace to a

    minimum, moves 'const' to the front where appropriate, removes

    'const' from value types and replaces const references with

    values.

    \sa checkConnectArgs(), normalizedType()

 */

QByteArray QMetaObject::normalizedSignature(const char *method)

{

    QByteArray result;

    if (!method || !*method)

        return result;

    int len = int(strlen(method));

    QVarLengthArray<char> stackbuf(len + 1);

    char *d = stackbuf.data();

    qRemoveWhitespace(method, d);

    result.reserve(len);

    int argdepth = 0;

    int templdepth = 0;

    while (*d) {

        if (argdepth == 1) {

            d = qNormalizeType(d, templdepth, result);

            if (!*d) //most likely an invalid signature.

                break;

        }

        if (*d == '(')

            ++argdepth;

        if (*d == ')')

            --argdepth;

        result += *d++;

    }

    return result;

}

enum { MaximumParamCount = 11 }; // up to 10 arguments + 1 return value

/*!

    Invokes the \a member (a signal or a slot name) on the object \a

    obj. Returns true if the member could be invoked. Returns false

    if there is no such member or the parameters did not match.

    The invocation can be either synchronous or asynchronous,

    depending on \a type:

    \list

    \o If \a type is Qt::DirectConnection, the member will be invoked immediately.

    \o If \a type is Qt::QueuedConnection,

       a QEvent will be sent and the member is invoked as soon as the application

       enters the main event loop.

    \o If \a type is Qt::BlockingQueuedConnection, the method will be invoked in

       the same way as for Qt::QueuedConnection, except that the current thread

       will block until the event is delivered. Using this connection type to

       communicate between objects in the same thread will lead to deadlocks.

    \o If \a type is Qt::AutoConnection, the member is invoked

       synchronously if \a obj lives in the same thread as the

       caller; otherwise it will invoke the member asynchronously.

    \endlist

    The return value of the \a member function call is placed in \a

    ret. If the invocation is asynchronous, the return value cannot

    be evaluated. You can pass up to ten arguments (\a val0, \a val1,

    \a val2, \a val3, \a val4, \a val5, \a val6, \a val7, \a val8,

    and \a val9) to the \a member function.

    QGenericArgument and QGenericReturnArgument are internal

    helper classes. Because signals and slots can be dynamically

    invoked, you must enclose the arguments using the Q_ARG() and

    Q_RETURN_ARG() macros. Q_ARG() takes a type name and a

    const reference of that type; Q_RETURN_ARG() takes a type name

    and a non-const reference.

    You only need to pass the name of the signal or slot to this function,

    not the entire signature. For example, to asynchronously invoke

    the \l{QPushButton::animateClick()}{animateClick()} slot on a

    QPushButton, use the following code:

    \snippet doc/src/snippets/code/src_corelib_kernel_qmetaobject.cpp 2

    With asynchronous method invocations, the parameters must be of

    types that are known to Qt's meta-object system, because Qt needs

    to copy the arguments to store them in an event behind the

    scenes. If you try to use a queued connection and get the error

    message

    \snippet doc/src/snippets/code/src_corelib_kernel_qmetaobject.cpp 3

    call qRegisterMetaType() to register the data type before you

    call invokeMethod().

    To synchronously invoke the \c compute(QString, int, double) slot on

    some arbitrary object \c obj retrieve its return value:

    \snippet doc/src/snippets/code/src_corelib_kernel_qmetaobject.cpp 4

    If the "compute" slot does not take exactly one QString, one int

    and one double in the specified order, the call will fail.

    \sa Q_ARG(), Q_RETURN_ARG(), qRegisterMetaType(), QMetaMethod::invoke()

*/

bool QMetaObject::invokeMethod(QObject *obj,

                               const char *member,

                               Qt::ConnectionType type,

                               QGenericReturnArgument ret,

                               QGenericArgument val0,

                               QGenericArgument val1,

                               QGenericArgument val2,

                               QGenericArgument val3,

                               QGenericArgument val4,

                               QGenericArgument val5,

                               QGenericArgument val6,

                               QGenericArgument val7,

                               QGenericArgument val8,

                               QGenericArgument val9)

{

    if (!obj)

        return false;

    QVarLengthArray<char, 512> sig;

    int len = qstrlen(member);

    if (len <= 0)

        return false;

    sig.append(member, len);

    sig.append('(');

    const char *typeNames[] = {ret.name(), val0.name(), val1.name(), val2.name(), val3.name(),

                               val4.name(), val5.name(), val6.name(), val7.name(), val8.name(),

                               val9.name()};

    int paramCount;

    for (paramCount = 1; paramCount < MaximumParamCount; ++paramCount) {

        len = qstrlen(typeNames[paramCount]);

        if (len <= 0)

            break;

        sig.append(typeNames[paramCount], len);

        sig.append(',');

    }

    if (paramCount == 1)

        sig.append(')'); // no parameters

    else

        sig[sig.size() - 1] = ')';

    sig.append('\0');

    int idx = obj->metaObject()->indexOfMethod(sig.constData());

    if (idx < 0) {

        QByteArray norm = QMetaObject::normalizedSignature(sig.constData());

        idx = obj->metaObject()->indexOfMethod(norm.constData());

    }

    if (idx < 0 || idx >= obj->metaObject()->methodCount()) {

        qWarning("QMetaObject::invokeMethod: No such method %s::%s",

                 obj->metaObject()->className(), sig.constData());

        return false;

    }

    QMetaMethod method = obj->metaObject()->method(idx);

    return method.invoke(obj, type, ret,

                         val0, val1, val2, val3, val4, val5, val6, val7, val8, val9);

}

/*! \fn bool QMetaObject::invokeMethod(QObject *obj, const char *member,

                                       QGenericReturnArgument ret,

                                       QGenericArgument val0 = QGenericArgument(0),

                                       QGenericArgument val1 = QGenericArgument(),

                                       QGenericArgument val2 = QGenericArgument(),

                                       QGenericArgument val3 = QGenericArgument(),

                                       QGenericArgument val4 = QGenericArgument(),

                                       QGenericArgument val5 = QGenericArgument(),

                                       QGenericArgument val6 = QGenericArgument(),

                                       QGenericArgument val7 = QGenericArgument(),

                                       QGenericArgument val8 = QGenericArgument(),

                                       QGenericArgument val9 = QGenericArgument());

    \overload invokeMethod()

    This overload always invokes the member using the connection type Qt::AutoConnection.

*/

/*! \fn bool QMetaObject::invokeMethod(QObject *obj, const char *member,

                             Qt::ConnectionType type,

                             QGenericArgument val0 = QGenericArgument(0),

                             QGenericArgument val1 = QGenericArgument(),

                             QGenericArgument val2 = QGenericArgument(),

                             QGenericArgument val3 = QGenericArgument(),

                             QGenericArgument val4 = QGenericArgument(),

                             QGenericArgument val5 = QGenericArgument(),

                             QGenericArgument val6 = QGenericArgument(),

                             QGenericArgument val7 = QGenericArgument(),

                             QGenericArgument val8 = QGenericArgument(),

                             QGenericArgument val9 = QGenericArgument())

    \overload invokeMethod()

    This overload can be used if the return value of the member is of no interest.

*/

/*!

    \fn bool QMetaObject::invokeMethod(QObject *obj, const char *member,

                             QGenericArgument val0 = QGenericArgument(0),

                             QGenericArgument val1 = QGenericArgument(),

                             QGenericArgument val2 = QGenericArgument(),

                             QGenericArgument val3 = QGenericArgument(),

                             QGenericArgument val4 = QGenericArgument(),

                             QGenericArgument val5 = QGenericArgument(),

                             QGenericArgument val6 = QGenericArgument(),

                             QGenericArgument val7 = QGenericArgument(),

                             QGenericArgument val8 = QGenericArgument(),

                             QGenericArgument val9 = QGenericArgument())

    \overload invokeMethod()

    This overload invokes the member using the connection type Qt::AutoConnection and

    ignores return values.

*/

/*!

    \class QMetaMethod

    \brief The QMetaMethod class provides meta-data about a member

    function.

    \ingroup objectmodel

    A QMetaMethod has a methodType(), a signature(), a list of

    parameterTypes() and parameterNames(), a return typeName(), a

    tag(), and an access() specifier. You can use invoke() to invoke

    the method on an arbitrary QObject.

    A method will only be registered with the meta-object system if it

    is a slot, a signal, or declared with the Q_INVOKABLE macro.

    Constructors can also be registered with Q_INVOKABLE.

    \sa QMetaObject, QMetaEnum, QMetaProperty, {Qt's Property System}

*/

/*!

    \enum QMetaMethod::Attributes

    \internal

    \value Compatibility

    \value Cloned

    \value Scriptable

*/

/*!

    \fn const QMetaObject *QMetaMethod::enclosingMetaObject() const

    \internal

*/

/*!

    \enum QMetaMethod::MethodType

    \value Method  The function is a plain member function.

    \value Signal  The function is a signal.

    \value Slot    The function is a slot.

    \value Constructor The function is a constructor.

*/

/*!

    \fn QMetaMethod::QMetaMethod()

    \internal

*/