QChar TextReaderBase::getNextCharacter()
{
bool couldRead=true;
if(buffer.isEmpty()){
couldRead=readIntoBuffer();
}else if(bufferPos==buffer.size()){
couldRead=readIntoBuffer();
if(couldRead){
++lineNo;
}
}
if(!couldRead){
return QChar();
}
QChar nextChar=buffer.at(bufferPos);
++bufferPos;
++pos;
++linePos;
return nextChar;
}
QByteArray AndroidRfComm::receive(const int maxNumOfBytes, const int waitMilliSeconds) {
qint64 maxTime=QDateTime::currentMSecsSinceEpoch()+waitMilliSeconds;
timeout=false;
while (buffer.length()<maxNumOfBytes) {
if (QDateTime::currentMSecsSinceEpoch()>maxTime) {
timeout=true;
break;
}
QThread::msleep(10);
QCoreApplication::processEvents();
readIntoBuffer();
}
// Truncate the result and keep only the remainder in the buffer
QByteArray result=buffer.left(maxNumOfBytes);
buffer.remove(0,result.length());
return result;
}
QString AndroidRfComm::receiveLine(const int maxCharacters, const int waitMilliSeconds) {
qint64 maxTime=QDateTime::currentMSecsSinceEpoch()+waitMilliSeconds;
// Receive repeatedly
timeout=false;
QString line=useLatin1?QString::fromLatin1(buffer):QString::fromUtf8(buffer);
int posi=line.indexOf(receiveTerminator);
while (posi<0 && line.length()<maxCharacters+receiveTerminator.length() && !timeout) {
int numRead=0;
while (numRead==0) {
if (QDateTime::currentMSecsSinceEpoch()>maxTime) {
timeout=true;
break;
}
QThread::msleep(10);
QCoreApplication::processEvents();
numRead=readIntoBuffer();
}
line=useLatin1?QString::fromLatin1(buffer):QString::fromUtf8(buffer);
posi=line.indexOf(receiveTerminator);
}
// Truncate the line
if (posi>=0 && posi<=maxCharacters) {
// The line is terminated
line=line.left(posi+receiveTerminator.length());
}
else {
// The line is not terminated or longer than allowed
line=line.left(maxCharacters);
}
// Remove the line from the buffer
buffer.remove(0,line.toUtf8().length());
// Remove the terminator from the line, if present
if (posi>=0 && posi<=maxCharacters) {
line=line.left(posi);
}
return line;
}
int ServerSocket::processEventThread()
{
epoll_event ev;
ev.events = EPOLLIN | EPOLLOUT | EPOLLET | EPOLLRDHUP;
epoll_event events[EPOLL_SIZE];
sockaddr clientAddr;
socklen_t addrlen = sizeof(sockaddr);
while (true)
{
int eventCount = epoll_wait(epfd, events, EPOLL_SIZE, -1);
if (eventCount == -1)
{
if (errno == EINTR)
{
continue;
}
Log::e("epoll wait error=%s", strerror(errno));
return -1;
}
for (int i = 0; i < eventCount; ++i)
{
epoll_event& evt(events[i]);
if (evt.events & EPOLLERR || evt.events & EPOLLHUP)
{
// handle errors
}
if (evt.events & EPOLLIN)
{
if (evt.data.fd == listenSocket)
{
while (true)
{
Socket acceptedSocket = accept4(listenSocket, &clientAddr, &addrlen, SOCK_NONBLOCK);
if (acceptedSocket == -1)
{
if (errno != EAGAIN && errno != EWOULDBLOCK)
{
Log::e("accept error: %s", strerror(errno));
}
break;
}
if (numClients < config.maxConnection)
{
ev.data.ptr = addClient(acceptedSocket, (sockaddr_in&)clientAddr);
epoll_ctl(epfd, EPOLL_CTL_ADD, acceptedSocket, &ev);
}
else
{
close(acceptedSocket);
}
}
}
else
{
ClientSocket* client = (ClientSocket*)evt.data.ptr;
readIntoBuffer(client);
}
}
if (evt.events & EPOLLOUT)
{
ClientSocket* client = (ClientSocket*)evt.data.ptr;
writeFromBuffer(client);
}
if (evt.events & EPOLLRDHUP)
{
ClientSocket* client = (ClientSocket*)evt.data.ptr;
client->isClosing = true;
}
}
}
return 0;
} //end of processEvent
void QSerial::canReadNotification( int )
{
readIntoBuffer();
emit readyRead();
}
