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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QIODEVICE_H
#define QIODEVICE_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_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Core)
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
};
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;
virtual bool open(OpenMode mode);
virtual void close();
// ### Qt 5: 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;
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);
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 bytesWritten(qint64 bytes);
void aboutToClose();
void readChannelFinished();
#endif
protected:
#ifdef QT_NO_QOBJECT
QIODevice(QIODevicePrivate &dd);
#else
QIODevice(QIODevicePrivate &dd, QObject *parent = 0);
#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_SCOPED_PRIVATE(QIODevice)
Q_DISABLE_COPY(QIODevice)
#ifdef QT3_SUPPORT
public:
typedef qint64 Offset;
inline QT3_SUPPORT int flags() const { return static_cast<int>(openMode()); }
inline QT3_SUPPORT int mode() const { return static_cast<int>(openMode()); }
inline QT3_SUPPORT int state() const;
inline QT3_SUPPORT bool isDirectAccess() const { return !isSequential(); }
inline QT3_SUPPORT bool isSequentialAccess() const { return isSequential(); }
inline QT3_SUPPORT bool isCombinedAccess() const { return false; }
inline QT3_SUPPORT bool isBuffered() const { return true; }
inline QT3_SUPPORT bool isRaw() const { return false; }
inline QT3_SUPPORT bool isSynchronous() const { return true; }
inline QT3_SUPPORT bool isAsynchronous() const { return false; }
inline QT3_SUPPORT bool isTranslated() const { return (openMode() & Text) != 0; }
inline QT3_SUPPORT bool isInactive() const { return !isOpen(); }
typedef int Status;
QT3_SUPPORT Status status() const;
QT3_SUPPORT void resetStatus();
inline QT3_SUPPORT Offset at() const { return pos(); }
inline QT3_SUPPORT bool at(Offset offset) { return seek(offset); }
inline QT3_SUPPORT qint64 readBlock(char *data, quint64 maxlen) { return read(data, maxlen); }
inline QT3_SUPPORT qint64 writeBlock(const char *data, quint64 len) { return write(data, len); }
inline QT3_SUPPORT qint64 writeBlock(const QByteArray &data) { return write(data); }
inline QT3_SUPPORT int getch() { char c; return getChar(&c) ? int(uchar(c)) : -1; }
inline QT3_SUPPORT int putch(int c) { return putChar(c) ? int(uchar(c)) : -1; }
inline QT3_SUPPORT int ungetch(int c) { ungetChar(uchar(c)); return c; }
#endif
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QIODevice::OpenMode)
#ifdef QT3_SUPPORT
static QT3_SUPPORT_VARIABLE const uint IO_Direct = 0x0100;
static QT3_SUPPORT_VARIABLE const uint IO_Sequential = 0x0200;
static QT3_SUPPORT_VARIABLE const uint IO_Combined = 0x0300;
static QT3_SUPPORT_VARIABLE const uint IO_TypeMask = 0x0300;
static QT3_SUPPORT_VARIABLE const uint IO_Raw = 0x0000;
static QT3_SUPPORT_VARIABLE const uint IO_Async = 0x0000;
#define IO_ReadOnly QIODevice::ReadOnly
#define IO_WriteOnly QIODevice::WriteOnly
#define IO_ReadWrite QIODevice::ReadWrite
#define IO_Append QIODevice::Append
#define IO_Truncate QIODevice::Truncate
#define IO_Translate QIODevice::Text
#define IO_ModeMask 0x00ff
static QT3_SUPPORT_VARIABLE const uint IO_Open = 0x1000;
static QT3_SUPPORT_VARIABLE const uint IO_StateMask = 0xf000;
static QT3_SUPPORT_VARIABLE const uint IO_Ok = 0;
static QT3_SUPPORT_VARIABLE const uint IO_ReadError = 1;
static QT3_SUPPORT_VARIABLE const uint IO_WriteError = 2;
static QT3_SUPPORT_VARIABLE const uint IO_FatalError = 3;
static QT3_SUPPORT_VARIABLE const uint IO_ResourceError = 4;
static QT3_SUPPORT_VARIABLE const uint IO_OpenError = 5;
static QT3_SUPPORT_VARIABLE const uint IO_ConnectError = 5;
static QT3_SUPPORT_VARIABLE const uint IO_AbortError = 6;
static QT3_SUPPORT_VARIABLE const uint IO_TimeOutError = 7;
static QT3_SUPPORT_VARIABLE const uint IO_UnspecifiedError = 8;
inline QT3_SUPPORT int QIODevice::state() const
{
return isOpen() ? 0x1000 : 0;
}
#endif
#if !defined(QT_NO_DEBUG_STREAM)
class QDebug;
Q_CORE_EXPORT QDebug operator<<(QDebug debug, QIODevice::OpenMode modes);
#endif
QT_END_NAMESPACE
QT_END_HEADER
#endif // QIODEVICE_H
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