Mach to Qt standard

[Damian7546]

Hi,

How change my error list creted in standard C++ to Qt posibility:

class MyError
{
    int ErrorCode;
public:
    std::map<int, std::string> ErrorList;
    MyError(int ErrCode)
    {
        ErrorCode = ErrCode;
        ErrorList[0x00] = "Unknown error.";
    }
    std::string getMessage() {
        return this->ErrorList[this->ErrorCode];
    }
};

?

Regards

[jsulm]

@Damian7546 said in Mach to Qt standard:

How change my error list creted in standard C++ to Qt posibility:

What does this mean and why do you need to change it?

[Damian7546]

@jsulm Hmm,
I am thinking change currently used:

#include <map>
#include <string>

to:

#include <QMap>
#include <QString>

What do you think ?

[jsulm]

@Damian7546 You can do that (but you can also use std container in Qt applications). What is the problem?

[Damian7546]

@jsulm Ok,
So if I stay in oryginal library, please tell me how can I normalize :
typedef std::vector<unsigned char> vec_bytes; to using QByteArray ?

Examle:

void MyFunction::showresponse(const QByteArray &result)
{
    if(this->CheckErrors(result__)) {
        //do something
    }
}

How convert QByteArray resutl; to vec_bytes result__; ?

[jsulm]

@Damian7546 In you case it seems to be way easier to use QByteArrray instead of std::vector<unsigned char> (change vec_bytes result__ to QByteArray).
If you want to have such a mix then you will need to iterate over the QByteArray elements and add them to std::vector<unsigned char>.

[Damian7546]

@jsulm I decided to change all to Qt standard.

Actually I do not know how change insert function in below line:

buffer.insert(std::end(buffer), std::begin(CRC), std::end(CRC));

where buffer is as ``QByteArray.

[JonB]

@Damian7546
Why mix Qt and std:: stuff? You want to append to buffer, so why not search QByteArray doc page for append (or insert), e.g. QByteArray &QByteArray::append(const QByteArray &ba) ?

[Damian7546]

@JonB

 QByteArray CRC = this->GetCRC16(buffer, buffer.size());  
 buffer.append(CRC);

it will be correct ?

[JonB]

@Damian7546

• We don't know since we don't know what this->GetCRC16(buffer, buffer.size()) does or returns.

• If I had to guess, I would say this is not right. If you are passing buffer, buffer.size() to GetCRC16() what does that do in buffer and why would you want to append the result to CRC if you have already called something which perhaps/at a guess already appends there? [Actually, it may be correct, provided GetCRC16() reads buffer.size() bytes from buffer and returns a new QByteArray, does not write into buffer.]