source: trunk/src/codecs/qtextcodecfactory.cpp@ 95

/****************************************************************************
**
** Implementation of QTextCodecFactory class
**
** Created : 010130
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition licenses may use this
** file in accordance with the Qt Commercial License Agreement provided
** with the Software.
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**   information about Qt Commercial License Agreements.
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**********************************************************************/

#include "qtextcodecfactory.h"

#ifndef QT_NO_TEXTCODEC

#ifndef QT_NO_COMPONENT
#include "qapplication.h"
#include "qcleanuphandler.h"
#include <private/qpluginmanager_p.h>
#include "qtextcodecinterface_p.h"

#ifdef QT_THREAD_SUPPORT
#  include <private/qmutexpool_p.h>
#endif // QT_THREAD_SUPPORT

#include <stdlib.h>


static QPluginManager<QTextCodecFactoryInterface> *manager = 0;
static QSingleCleanupHandler< QPluginManager<QTextCodecFactoryInterface> > cleanup_manager;

static void create_manager()
{
    if ( manager ) // already created
        return;

#ifdef QT_THREAD_SUPPORT
    // protect manager creation
    QMutexLocker locker( qt_global_mutexpool ?
                         qt_global_mutexpool->get( &manager ) : 0);

    // we check the manager pointer again to make sure that another thread
    // has not created the manager before us.

    if ( manager ) // already created
        return;
#endif

    manager =
        new QPluginManager<QTextCodecFactoryInterface>(IID_QTextCodecFactory,
                                                       QApplication::libraryPaths(), "/codecs",
                                                       FALSE);
    Q_CHECK_PTR( manager );
    cleanup_manager.set( &manager );
}

#endif // QT_NO_COMPONENT


QTextCodec *QTextCodecFactory::createForName(const QString &name)
{
    QTextCodec *codec = 0;

#ifndef QT_NO_COMPONENT

    // make sure the manager is created
    create_manager();

    QInterfacePtr<QTextCodecFactoryInterface> iface;
    manager->queryInterface(name, &iface );

    if (iface)
        codec = iface->createForName(name);

#endif // QT_NO_COMPONENT

    return codec;
}


QTextCodec *QTextCodecFactory::createForMib(int mib)
{
    QTextCodec *codec = 0;

#ifndef QT_NO_COMPONENT

    // make sure the manager is created
    create_manager();

    QInterfacePtr<QTextCodecFactoryInterface> iface;
    manager->queryInterface("MIB-" + QString::number(mib), &iface );

    if (iface)
        codec = iface->createForMib(mib);

#endif // QT_NO_COMPONENT

    return codec;
}


#endif // QT_NO_TEXTCODEC