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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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-3.0.html.
**
****************************************************************************/
#include "readmessageblock.h"
#include <QDataStream>
#include <QDebug>
#include <QIODevice>
#include <QVariant>
namespace ClangBackEnd {
ReadMessageBlock::ReadMessageBlock(QIODevice *ioDevice)
: ioDevice(ioDevice),
messageCounter(0),
blockSize(0)
{
}
void ReadMessageBlock::checkIfMessageIsLost(QDataStream &in)
{
qint64 currentMessageCounter;
in >> currentMessageCounter;
#ifndef DONT_CHECK_MESSAGE_COUNTER
bool messageLost = !((currentMessageCounter == 0 && messageCounter == 0) || (messageCounter + 1 == currentMessageCounter));
if (messageLost)
qWarning() << "client message lost: " << messageCounter << currentMessageCounter;
#endif
messageCounter = currentMessageCounter;
}
QVariant ReadMessageBlock::read()
{
QDataStream in(ioDevice);
QVariant message;
if (isTheWholeMessageReadable(in)) {
checkIfMessageIsLost(in);
in >> message;
}
return message;
}
QVector<QVariant> ReadMessageBlock::readAll()
{
QVector<QVariant> messages;
while (true) {
const QVariant message = read();
if (message.isValid())
messages.append(message);
else
return messages;
}
Q_UNREACHABLE();
}
void ReadMessageBlock::resetCounter()
{
messageCounter = 0;
}
bool ReadMessageBlock::isTheWholeMessageReadable(QDataStream &in)
{
if (ioDevice->bytesAvailable() == 0)
return false;
if (blockSize == 0)
in >> blockSize;
if (ioDevice->bytesAvailable() < blockSize)
return false;
blockSize = 0;
return true;
}
} // namespace ClangBackEnd
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