Could you print the value of buffer before calling the constructor?

By the way, if you want to extract the argument to your "/join" command, you can do it this way:

Qt Code: 
  1. // assuming QString tmp holds the complete line (i.e. "/join #qt")
  2. // detect '/' followed by an alphanumeric string followed by a whitespace followed by some other text
  3. QRegExp commandRx("^/([A-Za-z][A-Za-z0-0]+)\\s(.*)$");
  4. if(commandRx.exactMatch(tmp)){
  5.   // we have found a command
  6.   QString cmdName = commandRx.cap(1); // command name (first set of brackets)
  7.   QString arguments = commandRx.cap(2); // everything past the space (second set of brackets)
  8.   cmdName = cmdName.toLower();
  9.   if(cmdName == "join") {
  10.       QStringList channels = arguments.split(" "); // split on spaces
  11.       foreach(QString channel, channels) {
  12.           if(channel.startsWith("#")) {
  13.               joinChannel(channel.mid(1)); // join everything starting with '#'
  14.           }
  15.       }
  16.   } else if(cmdName == ... ) {
  17.       ...
  18.   } ...
  19. }
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