include/QtCore/qbuffer.h

0001 // Copyright (C) 2016 The Qt Company Ltd.
0002 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
0003
0004 #ifndef QBUFFER_H
0005 #define QBUFFER_H
0006
0007 #include <QtCore/qiodevice.h>
0008 #include <QtCore/qbytearray.h>
0009
0010 QT_BEGIN_NAMESPACE
0011
0012 class QObject;
0013 class QBufferPrivate;
0014
0015 class Q_CORE_EXPORT QBuffer : public QIODevice
0016 {
0017 #ifndef QT_NO_QOBJECT
0018     Q_OBJECT
0019 #endif
0020
0021 public:
0022 #ifndef QT_NO_QOBJECT
0023     explicit QBuffer(QObject *parent = nullptr);
0024     QBuffer(QByteArray *buf, QObject *parent = nullptr);
0025 #else
0026     QBuffer();
0027     explicit QBuffer(QByteArray *buf);
0028 #endif
0029     ~QBuffer();
0030
0031     QByteArray &buffer();
0032     const QByteArray &buffer() const;
0033     void setBuffer(QByteArray *a);
0034
0035     void setData(const QByteArray &data);
0036 #if QT_CORE_REMOVED_SINCE(6, 5) && QT_POINTER_SIZE != 4
0037     void setData(const char *data, int len) { setData(data, qsizetype(len)); }
0038 #endif
0039     void setData(const char *data, qsizetype len);
0040     const QByteArray &data() const;
0041
0042     bool open(OpenMode openMode) override;
0043
0044     void close() override;
0045     qint64 size() const override;
0046     qint64 pos() const override;
0047     bool seek(qint64 off) override;
0048     bool atEnd() const override;
0049     bool canReadLine() const override;
0050
0051 protected:
0052 #ifndef QT_NO_QOBJECT
0053     void connectNotify(const QMetaMethod &) override;
0054     void disconnectNotify(const QMetaMethod &) override;
0055 #endif
0056     qint64 readData(char *data, qint64 maxlen) override;
0057     qint64 writeData(const char *data, qint64 len) override;
0058
0059 private:
0060     Q_DECLARE_PRIVATE(QBuffer)
0061     Q_DISABLE_COPY(QBuffer)
0062
0063     Q_PRIVATE_SLOT(d_func(), void _q_emitSignals())
0064 };
0065
0066 QT_END_NAMESPACE
0067
0068 #endif // QBUFFER_H