C++ (Cpp) DataFrame::setValid Examples

Example #1

File: devreader-linux-proc.cpp Project: duskCoder/nload

void DevReaderLinuxProc::readFromDevice(DataFrame& dataFrame)
{
    if(m_deviceName.empty())
        return;
    
    ifstream fin("/proc/net/dev");
    if(!fin.is_open())
        return;
    
    // skip the two header lines
    string line;
    getline(fin, line);
    getline(fin, line);

    if(!fin.good())
        return;

    // search for device
    while(fin.good())
    {
        getline(fin, line);
        if(line.empty())
            continue;

        string::size_type posEnd = line.find(':');
        if(posEnd == string::npos)
            continue;

        string interfaceName = trim(line.substr(0, posEnd));
        if(interfaceName.empty())
            continue;

        // check if it is the device we want
        if(m_deviceName != interfaceName)
            continue;

        // read device data
        unsigned long long bytesIn = 0;
        unsigned long long packetsIn = 0;
        unsigned long long errorsIn = 0;
        unsigned long long dropsIn = 0;
        unsigned long long bytesOut = 0;
        unsigned long long packetsOut = 0;
        unsigned long long errorsOut = 0;
        unsigned long long dropsOut = 0;
        unsigned long long dummy = 0;

        istringstream sin(trim(line.substr(posEnd + 1)));

        sin >> bytesIn
            >> packetsIn
            >> errorsIn
            >> dropsIn
            >> dummy
            >> dummy
            >> dummy
            >> dummy
            >> bytesOut
            >> packetsOut
            >> errorsOut
            >> dropsOut;

        if(sin.fail())
            break;
        
        dataFrame.setTotalDataIn(bytesIn);
        dataFrame.setTotalDataOut(bytesOut);

        dataFrame.setTotalPacketsIn(packetsIn);
        dataFrame.setTotalPacketsOut(packetsOut);

        dataFrame.setTotalErrorsIn(errorsIn);
        dataFrame.setTotalErrorsOut(errorsOut);
        
        dataFrame.setTotalDropsIn(dropsIn);
        dataFrame.setTotalDropsOut(dropsOut);
        
        dataFrame.setValid(true);
        
        break;
    }
}