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diff --git a/src/corelib/io/qiodevice_p.h b/src/corelib/io/qiodevice_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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 are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QIODEVICE_P_H
+#define QIODEVICE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of QIODevice. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "QtCore/qiodevice.h"
+#include "QtCore/qbytearray.h"
+#include "QtCore/qobjectdefs.h"
+#include "QtCore/qstring.h"
+#include "private/qringbuffer_p.h"
+#ifndef QT_NO_QOBJECT
+#include "private/qobject_p.h"
+#endif
+
+QT_BEGIN_NAMESPACE
+
+class Q_CORE_EXPORT QIODevicePrivate
+#ifndef QT_NO_QOBJECT
+    : public QObjectPrivate
+#endif
+{
+    Q_DECLARE_PUBLIC(QIODevice)
+
+public:
+    QIODevicePrivate();
+    virtual ~QIODevicePrivate();
+
+    QIODevice::OpenMode openMode;
+    QString errorString;
+
+    QRingBuffer buffer;
+    qint64 pos;
+    qint64 devicePos;
+    bool baseReadLineDataCalled;
+
+    virtual bool putCharHelper(char c);
+
+    enum AccessMode {
+        Unset,
+        Sequential,
+        RandomAccess
+    };
+    mutable AccessMode accessMode;
+    inline bool isSequential() const
+    {
+        if (accessMode == Unset)
+            accessMode = q_func()->isSequential() ? Sequential : RandomAccess;
+        return accessMode == Sequential;
+    }
+    
+
+#ifdef QT_NO_QOBJECT
+    QIODevice *q_ptr;
+#endif
+};
+
+QT_END_NAMESPACE
+
+#endif // QIODEVICE_P_H