A function for XOR calculation

Here’s a function for XOR calculation that takes a QByteArray or any byte sequence as input and performs an XOR operation on all bytes, returning the final XOR result.

// XOR calculation function, accepts QByteArray and returns a single-byte XOR result
char SerialWorker::calculateXOR(QByteArray arr_data) 
{
    if (arr_data.isEmpty()) {
        // If the array is empty, return 0 or handle the error as needed
        return 0;
    }

    // Initialize XOR result with the first byte
    char xor_result = arr_data.at(0);

    // Perform XOR operation on each byte, starting from the second byte
    for (int i = 1; i < arr_data.size(); i++) {
        xor_result ^= arr_data.at(i);
    }

    // Return the final XOR result
    return xor_result;
}

Code Explanation

1. Boundary Check: The function first checks if the input array is empty to avoid performing operations on an empty array.
2. XOR Initialization: The XOR result is initialized with the first byte of the array.
3. Loop XOR: From the second byte onward, each byte is XORed with the current xor_result.
4. Return Result: The function returns the final XOR result.

This function can be integrated into other logic for checksum or data processing tasks as needed.