helper.c

Track1 *extractTrack1(char *data) {        Track1 *retval;        retval = malloc(sizeof(Track1));        char *t1, *t2, *t3;        fprintf(stderr, "Sep1 ");        t1 = strtok(data, "^");        fprintf(stderr, "Sep2 ");        t2 = strtok(NULL, "^");        fprintf(stderr, "Sep 3\n");        t3 = strtok(NULL, "^");        t1++; // Skipping starting trash byte        strncpy(retval->CardHolder, t2, strlen(t2));        strncpy(retval->PAN, t1, 16);        retval->PAN[16] = '\0'; // closer zero char        strncpy(retval->ExpDat, t3, 5);        retval->ExpDat[5] = '\0';        t3 += 5;        strncpy(retval->ServCode, t3, 4);        retval->ServCode[4] = '\0';        t3 += 4;        strncpy(retval->PINVerif, t3, 6);        retval->PINVerif[6] = '\0';        t3 += 6;        strncpy(retval->DiscData, t3, 11);        retval->DiscData[11] = '\0';        t3 +=11;        strncpy(retval->Visa, t3, 12);        retval->Visa[12] = '\0';        return retval;}