ERROR:ASSERT: "uint(i) < uint(size())"

isan

after call this function program send this error ASSERT: "uint(i) < uint(size())" in file /root/raspi/qt5pi/include/QtCore/qbytearray.h, line 470 and Aborted
why this happend?

QByteArray  GetResponse::getEPC(QByteArray ResponseData){
    QByteArray EPC;
    if(ResponseData.at(3)==0x01){
        if (ResponseData.size()!=0){
            unsigned char a=ResponseData.at(5);
            int maxCard=a;
            int i=7;
            int max=19;
            int j=0;
            for (int card = 0; card < maxCard; card++) {
                QByteArray temp;
                j=0;
                if(i+12<ResponseData.size()){
                    for (i;i < max; i++) {
                        temp.append(ResponseData.at(i));
                        j+=1;
                    }
                }
                if(temp.size()>0)
                    EPC.append(temp);
                i+=2;
                max+=14;
            }//end of for cards
        }
}
      
            return EPC;

    
}

mostefa

@isan

Here :

unsigned char a=ResponseData.at(5);

You are not sure that ResponseData.size is upper than 5 , than you have to do something like this:

if(ResponseData.size >= 5)
{
      unsigned char a=ResponseData.at(5);
}

I think that this is your problem

isan

@mostefa
i check with

if (ResponseData.size()!=0)

and this line

unsigned chara=ResponseData.at(5);

means from byte 5 of ResponseData get size

mostefa

@isan

Ok but for your first test ?

if(ResponseData.at(3)==0x01){

I think that you have to do something like this:

if(ResponseData.size > 3 )// it is really important to check that your DataResponse size is upper than 3
{
    if(ResponseData.at(3) == 0x01){
..
..
..
}
}

isan

@mostefa
tnx error is gone

mostefa

@isan

You are welcome :)