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-rw-r--r--src/qml/debugger/qpacket.cpp147
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-/****************************************************************************
-**
-** Copyright (C) 2015 The Qt Company Ltd.
-** Contact: http://www.qt.io/licensing/
-**
-** This file is part of the QtQml module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL21$
-** 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 http://www.qt.io/terms-conditions. For further
-** information use the contact form at http://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 2.1 or version 3 as published by the Free
-** Software Foundation and appearing in the file LICENSE.LGPLv21 and
-** LICENSE.LGPLv3 included in the packaging of this file. Please review the
-** following information to ensure the GNU Lesser General Public License
-** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** As a special exception, The Qt Company gives you certain additional
-** rights. These rights are described in The Qt Company LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qpacket_p.h"
-
-QT_BEGIN_NAMESPACE
-
-/*!
- \class QPacket
- \internal
-
- \brief The QPacket class encapsulates an unfragmentable packet of data to be
- transmitted by QPacketProtocol.
-
- The QPacket class works together with QPacketProtocol to make it simple to
- send arbitrary sized data "packets" across fragmented transports such as TCP
- and UDP.
-
- QPacket provides a QDataStream interface to an unfragmentable packet.
- Applications should construct a QPacket, propagate it with data and then
- transmit it over a QPacketProtocol instance. For example:
- \code
- QPacketProtocol protocol(...);
-
- QPacket myPacket;
- myPacket << "Hello world!" << 123;
- protocol.send(myPacket);
- \endcode
-
- As long as both ends of the connection are using the QPacketProtocol class,
- the data within this packet will be delivered unfragmented at the other end,
- ready for extraction.
-
- \code
- QByteArray greeting;
- int count;
-
- QPacket myPacket = protocol.read();
-
- myPacket >> greeting >> count;
- \endcode
-
- Only packets constructed from raw byte arrays may be read from. Empty QPacket
- instances are for transmission only and are considered "write only". Attempting
- to read data from them will result in undefined behavior.
-
- \ingroup io
- \sa QPacketProtocol
- */
-
-int QPacket::s_dataStreamVersion = QDataStream::Qt_4_7;
-
-void QPacket::setDataStreamVersion(int dataStreamVersion)
-{
- s_dataStreamVersion = dataStreamVersion;
-}
-
-int QPacket::dataStreamVersion()
-{
- return s_dataStreamVersion;
-}
-
-/*!
- Constructs an empty write-only packet.
- */
-QPacket::QPacket()
-{
- init(QIODevice::WriteOnly);
-}
-
-/*!
- Creates a copy of \a other. The initial stream positions are shared, but the
- two packets are otherwise independent.
- */
-QPacket::QPacket(const QPacket &other) : QDataStream()
-{
- assign(other);
-}
-
-QPacket &QPacket::operator=(const QPacket &other)
-{
- if (this != &other) {
- buf.close();
- assign(other);
- }
- return *this;
-}
-
-QPacket::QPacket(const QByteArray &data)
-{
- buf.setData(data);
- init(QIODevice::ReadOnly);
-}
-
-/*!
- Returns raw packet data.
- */
-QByteArray QPacket::data() const
-{
- return buf.data();
-}
-
-void QPacket::init(QIODevice::OpenMode mode)
-{
- buf.open(mode);
- setDevice(&buf);
- setVersion(s_dataStreamVersion);
-}
-
-void QPacket::assign(const QPacket &other)
-{
- buf.setData(other.buf.data());
- init(other.buf.openMode());
- buf.seek(other.buf.pos());
-}
-
-QT_END_NAMESPACE