/****************************************************************************
**
** Copyright (C) 2011 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the 
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
** 
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
****************************************************************************/

#ifndef QBUFFER_H
#define QBUFFER_H

#include <QtCore/qiodevice.h>
#include <QtCore/qbytearray.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Core)

class QObject;
class QBufferPrivate;

class Q_CORE_EXPORT QBuffer : public QIODevice
{
#ifndef QT_NO_QOBJECT
    Q_OBJECT
#endif

public:
#ifndef QT_NO_QOBJECT
     explicit QBuffer(QObject *parent = 0);
     QBuffer(QByteArray *buf, QObject *parent = 0);
#else
     QBuffer();
     explicit QBuffer(QByteArray *buf);
#endif
    ~QBuffer();

    QByteArray &buffer();
    const QByteArray &buffer() const;
    void setBuffer(QByteArray *a);

    void setData(const QByteArray &data);
    inline void setData(const char *data, int len);
    const QByteArray &data() const;

    bool open(OpenMode openMode);

    void close();
    qint64 size() const;
    qint64 pos() const;
    bool seek(qint64 off);
    bool atEnd() const;
    bool canReadLine() const;

protected:
#ifndef QT_NO_QOBJECT
    void connectNotify(const char*);
    void disconnectNotify(const char*);
#endif
    qint64 readData(char *data, qint64 maxlen);
    qint64 writeData(const char *data, qint64 len);

private:
    Q_DECLARE_PRIVATE(QBuffer)
    Q_DISABLE_COPY(QBuffer)

    Q_PRIVATE_SLOT(d_func(), void _q_emitSignals())
};

inline void QBuffer::setData(const char *adata, int alen)
{ setData(QByteArray(adata, alen)); }

QT_END_NAMESPACE

QT_END_HEADER

#endif // QBUFFER_H
