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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "qmqttcontrolpacket_p.h"
#include <QtCore/QtEndian>
#include <QtCore/QLoggingCategory>
QT_BEGIN_NAMESPACE
Q_DECLARE_LOGGING_CATEGORY(lcMqttClient)
QMqttControlPacket::QMqttControlPacket()
{
}
QMqttControlPacket::QMqttControlPacket(quint8 header)
: m_header(header)
{
}
QMqttControlPacket::QMqttControlPacket(quint8 header, const QByteArray &pay)
: m_header(header)
, m_payload(pay)
{
}
void QMqttControlPacket::clear()
{
m_header = 0;
m_payload.clear();
}
void QMqttControlPacket::setHeader(quint8 h)
{
if (h < QMqttControlPacket::CONNECT || h > DISCONNECT || h & 0x0F)
m_header = QMqttControlPacket::UNKNOWN;
else
m_header = h;
}
void QMqttControlPacket::append(char value)
{
m_payload.append(value);
}
void QMqttControlPacket::append(quint16 value)
{
const quint16 msb = qToBigEndian<quint16>(value);
const char * msb_c = reinterpret_cast<const char*>(&msb);
m_payload.append(msb_c, 2);
}
void QMqttControlPacket::append(quint32 value)
{
const quint32 msb = qToBigEndian<quint32>(value);
const char * msb_c = reinterpret_cast<const char*>(&msb);
m_payload.append(msb_c, 4);
}
void QMqttControlPacket::append(const QByteArray &data)
{
append(static_cast<quint16>(data.size()));
m_payload.append(data);
}
void QMqttControlPacket::appendRaw(const QByteArray &data)
{
m_payload.append(data);
}
void QMqttControlPacket::appendRawVariableInteger(quint32 value)
{
QByteArray data;
// Add length
if (value > 268435455)
qCDebug(lcMqttClient) << "Attempting to write variable integer overflow.";
do {
quint8 b = value % 128;
value /= 128;
if (value > 0)
b |= 0x80;
data.append(char(b));
} while (value > 0);
appendRaw(data);
}
QByteArray QMqttControlPacket::serialize() const
{
// Create ByteArray
QByteArray data;
// Add Header
data.append(char(m_header));
data.append(serializePayload());
return data;
}
QByteArray QMqttControlPacket::serializePayload() const
{
QByteArray data;
// Add length
quint32 msgSize = quint32(m_payload.size());
if (msgSize > 268435455)
qCDebug(lcMqttClient) << "Publishing a message bigger than maximum size.";
do {
quint8 b = msgSize % 128;
msgSize /= 128;
if (msgSize > 0)
b |= 0x80;
data.append(char(b));
} while (msgSize > 0);
// Add payload
data.append(m_payload);
return data;
}
QT_END_NAMESPACE
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