Re: [Dev-C++] segmentation fault at runtime

Are you sure that the beChannel object really have a valid pointer to your
beMDIWindow object.

Also, note that qDebug() which I don't know what it does might be
dangerous in case you have a multi-threaded application. Only the thread
that owns the MDI window should try and used any GDI objects.

/Per W

On Wed, 15 Dec 2004, Black Eagle wrote:

> Hi guys!
>
> I got a problem at run time, when using a pointer in a function.
>
> The error is in the function KviIrcServer* server() at line : return m_pSrv;
>
> In all other functions I got no problem with this variable. It is another
> class that tries to call this function, it's the friendclass beChannel
>
>
> Here is the beConsole.h
>
> #ifndef BE_CONSOLE_H
> #define BE_CONSOLE_H
>
> #include "beMDIWindow.h"
>
> class KviIrcServer;
>
> class beConsole : beMDIWindow
> {
> 	friend class beIRC;
> 	friend class beChannel;
> 	Q_OBJECT
> public :
> 	beConsole(QWidget * parent = 0, const char * name = 0, WFlags f = 0);
> 	~beConsole();
>
> 	KviIrcServer* server();
> protected :
> 	bool connectToServer();
> private slots :
>
> 	virtual void hostFound();
> 	virtual void connected();
> 	virtual void socketReadyRead();
> 	virtual void disconnected();
> 	void send(const QString & command);
> private :
> 	KviIrcServer  * m_pSrv;
> // 	KviProxy      * prx;
>
> 	QSocket * m_pQSocket;
> };
>
> #endif
>
> And here is the beConsole.cpp
> // beIRC stuff
> #include "beConsole.h"
> // kvirc stuff
> #define HAVE_CONFIG_H
> #include "config.h"
> #include <kvirc/3.0.1/kvi_app.h>
> #include <kvirc/3.0.1/kvi_ircserverdb.h>
> #include <kvirc/3.0.1/kvi_confignames.h>
> // QT Stuff
> #include <qregexp.h>
> #include <qsocket.h>
>
> extern KVIRC_API KviIrcServerDataBase           * g_pIrcServerDataBase;
>
> beConsole::beConsole(QWidget * parent,const char * name, WFlags f) :
> beMDIWindow(parent,name,f)
> {
> 	m_windowType = beMDIWindow::Console;
>
> 	KviIrcNetwork * net = g_pIrcServerDataBase->currentNetwork();
>
> 	if(net)m_pSrv = net->currentServer();
> 	QString srvname = m_pSrv->hostname();
> 	setCaption(srvname);
> 	connect ( this, SIGNAL( userInput(const QString &) ), this, SLOT ( send(const
> QString &) ) );
> }
>
> beConsole::~beConsole()
> {
> 	delete m_pSrv;
> }
>
> bool beConsole::connectToServer()
> {
> 	if(!m_pSrv) { return false; }
> // 	QString text = "Connect to server";
> // 	m_pLineView->addLine(text);
> 	// \n for new liens
> 	// \t for tabs
> 	append("<mytag>Connecting to server...</mytag>");
>
> 	m_pQSocket = new QSocket(this);
> 	connect( m_pQSocket, SIGNAL( hostFound() ), this, SLOT( hostFound() ) );
> 	connect( m_pQSocket, SIGNAL( connected() ), this, SLOT( connected() ) );
> 	connect( m_pQSocket, SIGNAL( readyRead() ), this, SLOT(socketReadyRead()) );
> 	connect( m_pQSocket, SIGNAL( connectionClosed() ), this,
> SLOT( disconnected() ));
> 	m_pQSocket->connectToHost( m_pSrv->hostname(), m_pSrv->port() );
> 	return true;
> }
>
>
> void beConsole::hostFound()
> {
> 	append("<mytag>Host found ...</mytag>");
> }
>
> void beConsole::connected()
> {
> 	append("<mytag>Connected to "+m_pSrv->hostname()+"</mytag>");
> 	QString cmd;
> 	cmd = "USER alex 0 "+m_pSrv->hostname()+" :Using beIRC 0.0.1\n";
> 	m_pQSocket->writeBlock( cmd.latin1(), cmd.length() );
> 	cmd = "NICK blackeagle654\n";
> 	m_pQSocket->writeBlock( cmd.latin1(), cmd.length() );
> }
>
> void beConsole::socketReadyRead()
> {
> // 	append("<mytag>Socket is ready to read</mytag>");
> 	while ( m_pQSocket->canReadLine() ) {
>
> 		QString msg = m_pQSocket->readLine();
> 		QRegExp rxA("(.*)\n$");
> 		rxA.search( msg );
> 		append( rxA.cap(1) );
> 		/* BEGIN ping pong fast reply */
> 		QRegExp rx("^PING :([0-9]+)");
> 		int pos;
> 		if( (pos = rx.search(msg)) != -1)
> 		{
> 			QString cmd = "PONG :"+rx.cap(1)+"\n";
> 			m_pQSocket->writeBlock( cmd.latin1(), cmd.length() );
>         	}
> 		/* END ping pong fast reply */
> 		QRegExp rx2("376.*End of /MOTD command");
> 		if( (pos = rx2.search(msg)) != -1)
> 		{
> 			QString cmd = "JOIN #gentoo\n";
> 			m_pQSocket->writeBlock( cmd.latin1(), cmd.length() );
> 		}
> 	}
> }
>
> void beConsole::disconnected()
> {
> 	append("<mytag>Disconnected from server</mytag>");
> }
>
> void beConsole::send(const QString & command)
> {
> 	append("<command>"+command+"</command>");
> // 	command.append("\n");
> 	QString tmp = command+"\n";
> 	m_pQSocket->writeBlock( tmp.latin1(), tmp.length() );
> }
>
> KviIrcServer* beConsole::server()
> {
> 	qDebug("returning server");
> 	return m_pSrv;
> }
>
>
> Thanks for any help !
>
>
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