| /**************************************************************************** |
| ** |
| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). |
| ** All rights reserved. |
| ** Contact: Nokia Corporation (qt-info@nokia.com) |
| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** 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 |
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| ** rights. These rights are described in the Nokia Qt LGPL Exception |
| ** version 1.1, 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 |
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| ** file. Please review the following information to ensure the GNU General |
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| ** $QT_END_LICENSE$ |
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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 |