[Qt-interest] Resizing static array data in struct fp_print_data? 0_o How?

[Nicholas Shatokhin]

Hello.

I found this in structure:

enum fp_print_data_type {
           PRINT_DATA_RAW = 0, /* memset-imposed default */
           PRINT_DATA_NBIS_MINUTIAE,
};

struct fp_print_data {
           uint16_t driver_id;
           uint32_t devtype;
           enum fp_print_data_type type;
           size_t length;
           unsigned char data[0];  // OK, it's array from one element
};

But when I enroll my finger, the data has the length 2404 elements. How it
change it's size?

I'm porting libfprint to qt4 and I need transform this struct to
QByteArray and back. I successfully write data to byteArray, but I have
difficult with backward procedure. See the function:


struct fp_print_data CFingerprintScanner::byteArrayToFpdata(QByteArray
byteArray)
{
       quint16 driver_id;
       quint32 devtype;
       quint32 type;
       quint64 length;
       char * data;

       struct fp_print_data fpdata;

       QBuffer buffer(&byteArray);
       buffer.open(QIODevice::ReadOnly);

       QDataStream in(&buffer);

       in >> driver_id;
       in >> devtype;
       in >> type;
       in >> length;

       data = (char *) malloc(length);

       in.readRawData(data, length);

       fpdata.driver_id = (uint16_t) driver_id;
       fpdata.devtype = (uint32_t) devtype;
       fpdata.type = (enum fp_print_data_type) type;
       fpdata.length = (size_t) length;

       // in this I must write data to fpdata.data, but how can I do it?
       // it's not possible to convert char * (or unsigned char*) to  
unsigned
char[0]

       free(data);

       return fpdata;
}

I'm disappointed. Somebody can tell me how can I change size of this array?


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