TCP Client issue

[LDS]

Hello,
I'd like to convert a char array to a string so I can show it in a status label or a text edit box:
Example:

char temp[4] = {0x01, 0x03, 0x03, 0x04};
....
statusLabel->setText(QString::fromAscii(temp, 4));

char temp[4] = {0x01, 0x03, 0x03, 0x04};
....
statusLabel->setText(QString::fromAscii(temp, 4));

To copy to clipboard, switch view to plain text mode 

The status label should show ideally 0x01 0x02 0x03 0x04.

I'm trying to do this in the fortune client example from Qt Creator.

void Client::readFortune()
{
    QDataStream in(tcpSocket);
    in.setVersion(QDataStream::Qt_4_3);
 
    char temp[30];
    int flag = 0;
    char temp2[4] = {0x01, 0x02, 0x03, 0x04};
 
    if (blockSize == 0) {
        if (tcpSocket->bytesAvailable() < (int)sizeof(quint16))
            return;
 
        in >> blockSize;
    }
 
    flag = tcpSocket->readLine(temp, 31);// i'm trying to read the receive buffer here and show it below
    if(flag |= -1){
        messageLineEdit->setText(QString::number(blockSize)); // I can see the block size, 1537
        statusLabel->setText(QString::fromAscii(temp2, 4));
    }
 
    if (tcpSocket->bytesAvailable() < blockSize)
        return;
 
    QString nextFortune;
    in >> nextFortune;
 
    if (nextFortune == currentFortune) {
        QTimer::singleShot(0, this, SLOT(requestNewFortune()));
        return;
    }
 
    currentFortune = nextFortune;
 
    statusLabel->setText(currentFortune);
 
    getFortuneButton->setEnabled(true);
}

void Client::readFortune()
{
    QDataStream in(tcpSocket);
    in.setVersion(QDataStream::Qt_4_3);

    char temp[30];
    int flag = 0;
    char temp2[4] = {0x01, 0x02, 0x03, 0x04};

    if (blockSize == 0) {
        if (tcpSocket->bytesAvailable() < (int)sizeof(quint16))
            return;

        in >> blockSize;
    }

    flag = tcpSocket->readLine(temp, 31);// i'm trying to read the receive buffer here and show it below
    if(flag |= -1){
        messageLineEdit->setText(QString::number(blockSize)); // I can see the block size, 1537
        statusLabel->setText(QString::fromAscii(temp2, 4));
    }

    if (tcpSocket->bytesAvailable() < blockSize)
        return;

    QString nextFortune;
    in >> nextFortune;

    if (nextFortune == currentFortune) {
        QTimer::singleShot(0, this, SLOT(requestNewFortune()));
        return;
    }

    currentFortune = nextFortune;

    statusLabel->setText(currentFortune);

    getFortuneButton->setEnabled(true);
}

To copy to clipboard, switch view to plain text mode 

[wysota]

Hello,
I'd like to convert a char array to a string so I can show it in a status label or a text edit box:
Example:

char temp[4] = {0x01, 0x03, 0x03, 0x04};
....
statusLabel->setText(QString::fromAscii(temp, 4));

char temp[4] = {0x01, 0x03, 0x03, 0x04};
....
statusLabel->setText(QString::fromAscii(temp, 4));

To copy to clipboard, switch view to plain text mode 

The status label should show ideally 0x01 0x02 0x03 0x04.

0x01-0x04 are unprintable characters. What you want is probably this:

char temp[4] = {0x01, 0x03, 0x03, 0x04};
QStringList hex;
for(int i=0;i<4;i++) {
  hex << QString("0x%1").arg((int)temp[i], 2, 16, QLatin1Char('0'));
}
statusLabel->setText(hex.join(" "));

char temp[4] = {0x01, 0x03, 0x03, 0x04};
QStringList hex;
for(int i=0;i<4;i++) {
  hex << QString("0x%1").arg((int)temp[i], 2, 16, QLatin1Char('0'));
}
statusLabel->setText(hex.join(" "));

To copy to clipboard, switch view to plain text mode 

[LDS]

Thank you for your quick answer.
I know I couldn't possibly print it directly, I already developed de server that sends the data to the client and I had to do the same thing but in C.
Anyway, it worked perfectly!


Thank you for your help,
LDS

Thread solved.