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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QIODEVICE_H
#define QIODEVICE_H
#include <QtCore/qglobal.h>
#ifndef QT_NO_QOBJECT
#include <QtCore/qobject.h>
#else
#include <QtCore/qobjectdefs.h>
#include <QtCore/qscopedpointer.h>
#endif
#include <QtCore/qstring.h>
#ifdef open
#error qiodevice.h must be included before any header file that defines open
#endif
QT_BEGIN_NAMESPACE
class QByteArray;
class QIODevicePrivate;
class Q_CORE_EXPORT QIODevice
#ifndef QT_NO_QOBJECT
: public QObject
#endif
{
#ifndef QT_NO_QOBJECT
Q_OBJECT
#endif
public:
enum OpenModeFlag {
NotOpen = 0x0000,
ReadOnly = 0x0001,
WriteOnly = 0x0002,
ReadWrite = ReadOnly | WriteOnly,
Append = 0x0004,
Truncate = 0x0008,
Text = 0x0010,
Unbuffered = 0x0020,
NewOnly = 0x0040,
ExistingOnly = 0x0080
};
Q_DECLARE_FLAGS(OpenMode, OpenModeFlag)
QIODevice();
#ifndef QT_NO_QOBJECT
explicit QIODevice(QObject *parent);
#endif
virtual ~QIODevice();
OpenMode openMode() const;
void setTextModeEnabled(bool enabled);
bool isTextModeEnabled() const;
bool isOpen() const;
bool isReadable() const;
bool isWritable() const;
virtual bool isSequential() const;
int readChannelCount() const;
int writeChannelCount() const;
int currentReadChannel() const;
void setCurrentReadChannel(int channel);
int currentWriteChannel() const;
void setCurrentWriteChannel(int channel);
virtual bool open(OpenMode mode);
virtual void close();
// ### Qt 6: pos() and seek() should not be virtual, and
// ### seek() should call a virtual seekData() function.
virtual qint64 pos() const;
virtual qint64 size() const;
virtual bool seek(qint64 pos);
virtual bool atEnd() const;
virtual bool reset();
virtual qint64 bytesAvailable() const;
virtual qint64 bytesToWrite() const;
qint64 read(char *data, qint64 maxlen);
QByteArray read(qint64 maxlen);
QByteArray readAll();
qint64 readLine(char *data, qint64 maxlen);
QByteArray readLine(qint64 maxlen = 0);
virtual bool canReadLine() const;
void startTransaction();
void commitTransaction();
void rollbackTransaction();
bool isTransactionStarted() const;
qint64 write(const char *data, qint64 len);
qint64 write(const char *data);
inline qint64 write(const QByteArray &data)
{ return write(data.constData(), data.size()); }
qint64 peek(char *data, qint64 maxlen);
QByteArray peek(qint64 maxlen);
qint64 skip(qint64 maxSize);
virtual bool waitForReadyRead(int msecs);
virtual bool waitForBytesWritten(int msecs);
void ungetChar(char c);
bool putChar(char c);
bool getChar(char *c);
QString errorString() const;
#ifndef QT_NO_QOBJECT
Q_SIGNALS:
void readyRead();
void channelReadyRead(int channel);
void bytesWritten(qint64 bytes);
void channelBytesWritten(int channel, qint64 bytes);
void aboutToClose();
void readChannelFinished();
#endif
protected:
#ifdef QT_NO_QOBJECT
QIODevice(QIODevicePrivate &dd);
#else
QIODevice(QIODevicePrivate &dd, QObject *parent = nullptr);
#endif
virtual qint64 readData(char *data, qint64 maxlen) = 0;
virtual qint64 readLineData(char *data, qint64 maxlen);
virtual qint64 writeData(const char *data, qint64 len) = 0;
void setOpenMode(OpenMode openMode);
void setErrorString(const QString &errorString);
#ifdef QT_NO_QOBJECT
QScopedPointer<QIODevicePrivate> d_ptr;
#endif
private:
Q_DECLARE_PRIVATE(QIODevice)
Q_DISABLE_COPY(QIODevice)
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QIODevice::OpenMode)
#if !defined(QT_NO_DEBUG_STREAM)
class QDebug;
Q_CORE_EXPORT QDebug operator<<(QDebug debug, QIODevice::OpenMode modes);
#endif
QT_END_NAMESPACE
#endif // QIODEVICE_H
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