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** GNU General Public License Usage | |
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#ifndef QNONCONTIGUOUSBYTEDEVICE_H | |
#define QNONCONTIGUOUSBYTEDEVICE_H | |
// | |
// W A R N I N G | |
// ------------- | |
// | |
// This file is not part of the Qt API. It exists for the convenience | |
// of a number of Qt sources files. This header file may change from | |
// version to version without notice, or even be removed. | |
// | |
// We mean it. | |
// | |
#include <QtCore/qobject.h> | |
#include <QtCore/qbytearray.h> | |
#include <QtCore/qbuffer.h> | |
#include <QtCore/qiodevice.h> | |
#include "private/qringbuffer_p.h" | |
QT_BEGIN_NAMESPACE | |
class Q_CORE_EXPORT QNonContiguousByteDevice : public QObject | |
{ | |
Q_OBJECT | |
public: | |
virtual const char* readPointer(qint64 maximumLength, qint64 &len) = 0; | |
virtual bool advanceReadPointer(qint64 amount) = 0; | |
virtual bool atEnd() = 0; | |
virtual bool reset() = 0; | |
void disableReset(); | |
virtual qint64 size() = 0; | |
virtual ~QNonContiguousByteDevice(); | |
protected: | |
QNonContiguousByteDevice(); | |
bool resetDisabled; | |
Q_SIGNALS: | |
void readyRead(); | |
void readProgress(qint64 current, qint64 total); | |
}; | |
class Q_CORE_EXPORT QNonContiguousByteDeviceFactory | |
{ | |
public: | |
static QNonContiguousByteDevice* create(QIODevice *device); | |
static QNonContiguousByteDevice* create(QByteArray *byteArray); | |
static QNonContiguousByteDevice* create(QRingBuffer *ringBuffer); | |
static QIODevice* wrap(QNonContiguousByteDevice* byteDevice); | |
}; | |
// the actual implementations | |
// | |
class QNonContiguousByteDeviceByteArrayImpl : public QNonContiguousByteDevice | |
{ | |
public: | |
QNonContiguousByteDeviceByteArrayImpl(QByteArray *ba); | |
~QNonContiguousByteDeviceByteArrayImpl(); | |
const char* readPointer(qint64 maximumLength, qint64 &len); | |
bool advanceReadPointer(qint64 amount); | |
bool atEnd(); | |
bool reset(); | |
qint64 size(); | |
protected: | |
QByteArray* byteArray; | |
qint64 currentPosition; | |
}; | |
class QNonContiguousByteDeviceRingBufferImpl : public QNonContiguousByteDevice | |
{ | |
public: | |
QNonContiguousByteDeviceRingBufferImpl(QRingBuffer *rb); | |
~QNonContiguousByteDeviceRingBufferImpl(); | |
const char* readPointer(qint64 maximumLength, qint64 &len); | |
bool advanceReadPointer(qint64 amount); | |
bool atEnd(); | |
bool reset(); | |
qint64 size(); | |
protected: | |
QRingBuffer* ringBuffer; | |
qint64 currentPosition; | |
}; | |
class QNonContiguousByteDeviceIoDeviceImpl : public QNonContiguousByteDevice | |
{ | |
public: | |
QNonContiguousByteDeviceIoDeviceImpl(QIODevice *d); | |
~QNonContiguousByteDeviceIoDeviceImpl(); | |
const char* readPointer(qint64 maximumLength, qint64 &len); | |
bool advanceReadPointer(qint64 amount); | |
bool atEnd(); | |
bool reset(); | |
qint64 size(); | |
protected: | |
QIODevice* device; | |
QByteArray* currentReadBuffer; | |
qint64 currentReadBufferSize; | |
qint64 currentReadBufferAmount; | |
qint64 currentReadBufferPosition; | |
qint64 totalAdvancements; | |
bool eof; | |
qint64 initialPosition; | |
}; | |
class QNonContiguousByteDeviceBufferImpl : public QNonContiguousByteDevice | |
{ | |
public: | |
QNonContiguousByteDeviceBufferImpl(QBuffer *b); | |
~QNonContiguousByteDeviceBufferImpl(); | |
const char* readPointer(qint64 maximumLength, qint64 &len); | |
bool advanceReadPointer(qint64 amount); | |
bool atEnd(); | |
bool reset(); | |
qint64 size(); | |
protected: | |
QBuffer* buffer; | |
QByteArray byteArray; | |
QNonContiguousByteDeviceByteArrayImpl* arrayImpl; | |
}; | |
// ... and the reverse thing | |
class QByteDeviceWrappingIoDevice : public QIODevice | |
{ | |
public: | |
QByteDeviceWrappingIoDevice (QNonContiguousByteDevice *bd); | |
~QByteDeviceWrappingIoDevice (); | |
virtual bool isSequential () const; | |
virtual bool atEnd () const; | |
virtual bool reset (); | |
virtual qint64 size () const; | |
protected: | |
virtual qint64 readData ( char * data, qint64 maxSize ); | |
virtual qint64 writeData ( const char * data, qint64 maxSize ); | |
QNonContiguousByteDevice *byteDevice; | |
}; | |
QT_END_NAMESPACE | |
#endif |