void QQnxNavigatorEventNotifier::readData()
{
qNavigatorEventNotifierDebug() << Q_FUNC_INFO << "reading navigator data";
// allocate buffer for pps data
char buffer[ppsBufferSize];
// attempt to read pps data
errno = 0;
int bytes = qt_safe_read(m_fd, buffer, ppsBufferSize - 1);
if (bytes == -1)
qFatal("QQNX: failed to read navigator pps, errno=%d", errno);
// check if pps data was received
if (bytes > 0) {
// ensure data is null terminated
buffer[bytes] = '\0';
// process received message
QByteArray ppsData(buffer);
QByteArray msg;
QByteArray dat;
QByteArray id;
parsePPS(ppsData, msg, dat, id);
handleMessage(msg, dat, id);
}
}
bool QQnxNavigatorPps::sendPpsMessage(const QByteArray &message, const QByteArray &data)
{
QByteArray ppsMessage = "msg::" + message;
if (!data.isEmpty())
ppsMessage += "\ndat::" + data;
ppsMessage += "\n";
qNavigatorDebug() << Q_FUNC_INFO << "sending PPS message:\n" << ppsMessage;
// send pps message to navigator
errno = 0;
int bytes = qt_safe_write(m_fd, ppsMessage.constData(), ppsMessage.size());
if (bytes == -1)
qFatal("QQNX: failed to write navigator pps, errno=%d", errno);
// allocate buffer for pps data
char buffer[ppsBufferSize];
// attempt to read pps data
do {
errno = 0;
bytes = qt_safe_read(m_fd, buffer, ppsBufferSize - 1);
if (bytes == -1)
qFatal("QQNX: failed to read navigator pps, errno=%d", errno);
} while (bytes == 0);
// ensure data is null terminated
buffer[bytes] = '\0';
qNavigatorDebug() << Q_FUNC_INFO << "received PPS message:\n" << buffer;
// process received message
QByteArray ppsData(buffer);
QHash<QByteArray, QByteArray> responseFields;
parsePPS(ppsData, responseFields);
if (responseFields.contains("res") && responseFields.value("res") == message) {
if (responseFields.contains("err")) {
qCritical() << "navigator responded with error: " << responseFields.value("err");
return false;
}
}
return true;
}
