Qt十六進制字符串轉十六進制編碼

Qt十六進制字符串轉十六進制編碼

QString轉HEX

QByteArray QString2Hex(QString str)
{
    QByteArray senddata;
    int hexdata,lowhexdata;
    int hexdatalen = 0;
    int len = str.length();
    senddata.resize(len/2);
    char lstr,hstr;
    for (int i=0; i<len;)
    {
        hstr = str[i].toLatin1();
        if (hstr == ' ')
        {
            i++;
            continue;
        }
        i++;
        if (i >=len)
            break;
        lstr = str[i].toLatin1();
        hexdata = ConvertHexChar(hstr);
        lowhexdata = ConvertHexChar(lstr);
        if((hexdata==16) || (lowhexdata==16))
        {
            break;
        }else{
            hexdata = hexdata*16+lowhexdata;
        }
        i++;
        senddata[hexdatalen] = (char)hexdata;
        hexdatalen++;
    }
    senddata.resize(hexdatalen);
    return senddata;
}

char ConvertHexChar(char ch)
{
    if((ch>='0') && (ch<='9'))
        return ch-0x30;
    else if((ch>='A') && (ch<='F'))
        return ch-'A'+10;
    else if((ch>='a') && (ch<='f'))
        return ch-'a'+10;
    else{
        return (-1);
    }
}

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