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diff --git a/src/corelib/io/qtextstream_p.h b/src/corelib/io/qtextstream_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTEXTSTREAM_P_H
+#define QTEXTSTREAM_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qtextstream.h"
+#ifndef QT_NO_TEXTCODEC
+#include "qtextcodec.h"
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_QOBJECT
+class QDeviceClosedNotifier : public QObject
+{
+    Q_OBJECT
+public:
+    inline QDeviceClosedNotifier()
+    { }
+
+    inline void setupDevice(QTextStream *stream, QIODevice *device)
+    {
+        disconnect();
+        if (device)
+            connect(device, SIGNAL(aboutToClose()), this, SLOT(flushStream()));
+        this->stream = stream;
+    }
+
+public Q_SLOTS:
+    inline void flushStream() { stream->flush(); }
+
+private:
+    QTextStream *stream;
+};
+#endif
+
+class QTextStreamPrivate
+{
+    Q_DECLARE_PUBLIC(QTextStream)
+public:
+    QTextStreamPrivate(QTextStream *q_ptr);
+    ~QTextStreamPrivate();
+    void reset();
+
+    // device
+    QIODevice *device;
+#ifndef QT_NO_QOBJECT
+    QDeviceClosedNotifier deviceClosedNotifier;
+#endif
+    bool deleteDevice;
+
+    // string
+    QString *string;
+    int stringOffset;
+    QIODevice::OpenMode stringOpenMode;
+
+#ifndef QT_NO_TEXTCODEC
+    // codec
+    QTextCodec *codec;
+    QTextCodec::ConverterState readConverterState;
+    QTextCodec::ConverterState writeConverterState;
+    QTextCodec::ConverterState *readConverterSavedState;
+    bool autoDetectUnicode;
+#endif
+
+    // i/o
+    enum TokenDelimiter {
+        Space,
+        NotSpace,
+        EndOfLine
+    };
+
+    QString read(int maxlen);
+    bool scan(const QChar **ptr, int *tokenLength,
+              int maxlen, TokenDelimiter delimiter);
+    inline const QChar *readPtr() const;
+    inline void consumeLastToken();
+    inline void consume(int nchars);
+    void saveConverterState(qint64 newPos);
+    void restoreToSavedConverterState();
+    int lastTokenSize;
+
+    // Return value type for getNumber()
+    enum NumberParsingStatus {
+        npsOk,
+        npsMissingDigit,
+        npsInvalidPrefix
+    };
+
+    inline bool getChar(QChar *ch);
+    inline void ungetChar(QChar ch);
+    NumberParsingStatus getNumber(qulonglong *l);
+    bool getReal(double *f);
+
+    inline void write(const QString &data);
+    inline void putString(const QString &ch, bool number = false);
+    void putNumber(qulonglong number, bool negative);
+
+    // buffers
+    bool fillReadBuffer(qint64 maxBytes = -1);
+    void resetReadBuffer();
+    void flushWriteBuffer();
+    QString writeBuffer;
+    QString readBuffer;
+    int readBufferOffset;
+    int readConverterSavedStateOffset; //the offset between readBufferStartDevicePos and that start of the buffer
+    qint64 readBufferStartDevicePos;
+
+    // streaming parameters
+    class Params
+    {
+    public:
+        void reset();
+
+        int realNumberPrecision;
+        int integerBase;
+        int fieldWidth;
+        QChar padChar;
+        QTextStream::FieldAlignment fieldAlignment;
+        QTextStream::RealNumberNotation realNumberNotation;
+        QTextStream::NumberFlags numberFlags;
+    };
+    Params params;
+
+    // status
+    QTextStream::Status status;
+
+    QLocale locale;
+
+    QTextStream *q_ptr;
+};
+
+QT_END_NAMESPACE
+
+#endif // QTEXTSTREAM_P_H