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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 "messageenvelop.h"
#include <QDataStream>
#include <QDebug>
#include <QIODevice>
#include <QVariant>
namespace ClangBackEnd {
ReadMessageBlock::ReadMessageBlock(QIODevice *ioDevice)
: m_ioDevice(ioDevice),
m_messageCounter(0),
m_blockSize(0)
{
}
bool ReadMessageBlock::checkIfMessageIsLost(QDataStream &in)
{
qint64 currentMessageCounter;
in >> currentMessageCounter;
bool messageIsLost = false;
#ifndef DONT_CHECK_MESSAGE_COUNTER
messageIsLost = !((currentMessageCounter == 0 && m_messageCounter == 0) || (m_messageCounter + 1 == currentMessageCounter));
if (messageIsLost)
qWarning() << "message lost: " << m_messageCounter << currentMessageCounter;
#endif
m_messageCounter = currentMessageCounter;
return messageIsLost;
}
MessageEnvelop ReadMessageBlock::read()
{
QDataStream in(m_ioDevice);
MessageEnvelop message;
if (isTheWholeMessageReadable(in)) {
bool messageIsLost = checkIfMessageIsLost(in);
in >> message;
if (messageIsLost)
qDebug() << message;
}
return message;
}
std::vector<MessageEnvelop> ReadMessageBlock::readAll()
{
std::vector<MessageEnvelop> messages;
while (true) {
MessageEnvelop message = read();
if (message.isValid())
messages.push_back(std::move(message));
else
return messages;
}
Q_UNREACHABLE();
}
void ReadMessageBlock::resetState()
{
m_messageCounter = 0;
}
void ReadMessageBlock::setIoDevice(QIODevice *ioDevice)
{
m_ioDevice = ioDevice;
}
bool ReadMessageBlock::isTheWholeMessageReadable(QDataStream &in)
{
if (m_ioDevice->bytesAvailable() < qint64(sizeof(m_blockSize)))
return false;
if (m_blockSize == 0)
in >> m_blockSize;
if (m_ioDevice->bytesAvailable() < m_blockSize)
return false;
m_blockSize = 0;
return true;
}
} // namespace ClangBackEnd
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