/** Iterate over the partitions on a device.
* @param disk Disk to iterate over.
* @param cb Callback function.
* @return Whether the device contained an MBR partition table. */
static bool mbr_partition_iterate(disk_device_t *disk, partition_iterate_cb_t cb) {
mbr_t *mbr __cleanup_free;
bool seen_extended;
/* Read in the MBR, which is in the first block on the device. */
mbr = malloc(sizeof(*mbr));
if (!read_mbr(disk, mbr, 0) || mbr->signature != MBR_SIGNATURE)
return false;
/* Check if this is a GPT partition table (technically we should not get
* here if this is a GPT disk as the GPT code should be reached first). This
* is just a safeguard. */
if (mbr->partitions[0].type == MBR_PARTITION_TYPE_GPT)
return false;
/* Loop through all partitions in the table. */
seen_extended = false;
for (size_t i = 0; i < array_size(mbr->partitions); i++) {
mbr_partition_t *partition = &mbr->partitions[i];
if (!is_valid(disk, partition))
continue;
if (is_extended(partition)) {
if (seen_extended) {
dprintf("mbr: warning: ignoring multiple extended partitions\n");
continue;
}
handle_extended(disk, partition->start_lba, cb);
seen_extended = true;
} else {
cb(disk, i, partition->start_lba, partition->num_sectors);
}
}
return true;
}
/* Handle Command, special char or attribute and also check for
* channel changes.
* Returns 1 if something was written to screen, 0 otherwise */
int disCommand(unsigned char hi, unsigned char lo, ccx_decoder_608_context *context, struct cc_subtitle *sub)
{
int wrote_to_screen=0;
/* Full channel changes are only allowed for "GLOBAL CODES",
* "OTHER POSITIONING CODES", "BACKGROUND COLOR CODES",
* "MID-ROW CODES".
* "PREAMBLE ACCESS CODES", "BACKGROUND COLOR CODES" and
* SPECIAL/SPECIAL CHARACTERS allow only switching
* between 1&3 or 2&4. */
context->new_channel = check_channel(hi, context);
//if (wb->data608->channel!=cc_channel)
// continue;
if (hi>=0x18 && hi<=0x1f)
hi=hi-8;
switch (hi)
{
case 0x10:
if (lo>=0x40 && lo<=0x5f)
handle_pac(hi, lo, context);
break;
case 0x11:
if (lo>=0x20 && lo<=0x2f)
handle_text_attr(hi, lo, context);
if (lo>=0x30 && lo<=0x3f)
{
wrote_to_screen=1;
handle_double(hi, lo, context);
}
if (lo>=0x40 && lo<=0x7f)
handle_pac(hi, lo, context);
break;
case 0x12:
case 0x13:
if (lo>=0x20 && lo<=0x3f)
{
wrote_to_screen = handle_extended(hi, lo, context);
}
if (lo>=0x40 && lo<=0x7f)
handle_pac(hi, lo, context);
break;
case 0x14:
case 0x15:
if (lo>=0x20 && lo<=0x2f)
handle_command(hi, lo, context, sub);
if (lo>=0x40 && lo<=0x7f)
handle_pac(hi, lo, context);
break;
case 0x16:
if (lo>=0x40 && lo<=0x7f)
handle_pac(hi, lo, context);
break;
case 0x17:
if (lo>=0x21 && lo<=0x23)
handle_command(hi, lo, context, sub);
if (lo>=0x2e && lo<=0x2f)
handle_text_attr(hi, lo, context);
if (lo>=0x40 && lo<=0x7f)
handle_pac(hi, lo, context);
break;
}
return wrote_to_screen;
}