qbuffer.h

奇趣公司比较新的qt/emd版本

/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at [e-mail].
**
** In addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.0, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** In addition, as a special exception, Trolltech, as the sole copyright
** holder for Qt Designer, grants users of the Qt/Eclipse Integration
** plug-in the right for the Qt/Eclipse Integration to link to
** functionality provided by Qt Designer and its related libraries.
**
** Trolltech reserves all rights not expressly granted herein.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef QBUFFER_H
#define QBUFFER_H

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

QT_BEGIN_HEADER

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:
    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_HEADER

#endif // QBUFFER_H