source: trunk/src/dbus/qdbusargument.cpp@ 728

/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** This file is part of the QtDBus module of the Qt Toolkit.
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** accordance with the Qt Commercial License Agreement provided with the
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** 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
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** 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
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#include "qdbusargument.h"

#include <qatomic.h>
#include <qbytearray.h>
#include <qlist.h>
#include <qmap.h>
#include <qstring.h>
#include <qstringlist.h>
#include <qvariant.h>
#include <qdatetime.h>
#include <qrect.h>
#include <qline.h>

#include "qdbusargument_p.h"
#include "qdbusmetatype_p.h"
#include "qdbusutil_p.h"

QT_BEGIN_NAMESPACE

QDBusArgumentPrivate::~QDBusArgumentPrivate()
{
    if (message)
        q_dbus_message_unref(message);
}

QByteArray QDBusArgumentPrivate::createSignature(int id)
{
    if (!qdbus_loadLibDBus())
        return "";

    QByteArray signature;
    QDBusMarshaller *marshaller = new QDBusMarshaller;
    marshaller->ba = &signature;

    // run it
    void *null = 0;
    QVariant v(id, null);
    QDBusArgument arg(marshaller);
    QDBusMetaType::marshall(arg, v.userType(), v.constData());
    arg.d = 0;

    // delete it
    bool ok = marshaller->ok;
    delete marshaller;

    if (signature.isEmpty() || !ok || !QDBusUtil::isValidSingleSignature(QString::fromLatin1(signature))) {
        qWarning("QDBusMarshaller: type `%s' produces invalid D-BUS signature `%s' "
                 "(Did you forget to call beginStructure() ?)",
                 QVariant::typeToName( QVariant::Type(id) ),
                 signature.isEmpty() ? "<empty>" : signature.constData());
        return "";
    } else if ((signature.at(0) != DBUS_TYPE_ARRAY && signature.at(0) != DBUS_STRUCT_BEGIN_CHAR) ||
               (signature.at(0) == DBUS_TYPE_ARRAY && (signature.at(1) == DBUS_TYPE_BYTE ||
                                                       signature.at(1) == DBUS_TYPE_STRING))) {
        qWarning("QDBusMarshaller: type `%s' attempts to redefine basic D-BUS type '%s' (%s) "
                 "(Did you forget to call beginStructure() ?)",
                 QVariant::typeToName( QVariant::Type(id) ),
                 signature.constData(),
                 QVariant::typeToName( QVariant::Type(QDBusMetaType::signatureToType(signature))) );
        return "";
    }
    return signature;
}

bool QDBusArgumentPrivate::checkWrite(QDBusArgumentPrivate *&d)
{
    if (!d)
        return false;
    if (d->direction == Marshalling) {
        if (!d->marshaller()->ok)
            return false;

        if (d->message && d->ref != 1) {
            QDBusMarshaller *dd = new QDBusMarshaller;
            dd->message = q_dbus_message_copy(d->message);
            q_dbus_message_iter_init_append(dd->message, &dd->iterator);

            if (!d->ref.deref())
                delete d;
            d = dd;
        }
        return true;
    }

#ifdef QT_DEBUG
    qFatal("QDBusArgument: write from a read-only object");
#else
    qWarning("QDBusArgument: write from a read-only object");
#endif
    return false;
}

bool QDBusArgumentPrivate::checkRead(QDBusArgumentPrivate *d)
{
    if (!d)
        return false;
    if (d->direction == Demarshalling)
        return true;

#ifdef QT_DEBUG
    qFatal("QDBusArgument: read from a write-only object");
#else
    qWarning("QDBusArgument: read from a write-only object");
#endif