int PartitionHandle::FindPartitions()
{
MASTER_BOOT_RECORD *mbr = (MASTER_BOOT_RECORD *) malloc(MAX_SECTOR_SIZE);
if(!mbr)
return -1;
// Read the first sector on the device
if (!interface->readSectors(0, 1, mbr)) {
free(mbr);
return -1;
}
// If this is the devices master boot record
if (mbr->signature != MBR_SIGNATURE) {
free(mbr);
return -1;
}
for (int i = 0; i < 4; i++)
{
PARTITION_RECORD * partition = (PARTITION_RECORD *) &mbr->partitions[i];
if(partition->type == PARTITION_TYPE_GPT)
{
int ret = CheckGPT(i);
if(ret == 0)
break;
}
if(partition->type == PARTITION_TYPE_DOS33_EXTENDED || partition->type == PARTITION_TYPE_WIN95_EXTENDED)
{
CheckEBR(i, le32(partition->lba_start));
continue;
}
if(le32(partition->block_count) > 0)
{
AddPartition(PartFromType(partition->type), le32(partition->lba_start),
le32(partition->block_count), (partition->status == PARTITION_BOOTABLE),
partition->type, i);
}
}
free(mbr);
return 0;
}
s8 PartitionHandle::FindPartitions()
{
MASTER_BOOT_RECORD *mbr = (MASTER_BOOT_RECORD*)MEM2_alloc(MAX_BYTES_PER_SECTOR);
if(mbr == NULL)
return -1;
// Read the first sector on the device
if(!interface->readSectors(0, 1, mbr))
{
MEM2_free(mbr);
return -1;
}
// If this is the devices master boot record
if(mbr->signature != MBR_SIGNATURE && mbr->signature != MBR_SIGNATURE_MOD)
{
MEM2_free(mbr);
return -1;
}
for(u8 i = 0; i < 4; i++)
{
PARTITION_RECORD *partition = (PARTITION_RECORD *)&mbr->partitions[i];
if(partition->type == PARTITION_TYPE_GPT)
{
s8 ret = CheckGPT(i);
if(ret == 0) // if it's a GPT we don't need to go on looking through the mbr anymore
return ret;
}
if(partition->type == PARTITION_TYPE_DOS33_EXTENDED || partition->type == PARTITION_TYPE_WIN95_EXTENDED)
{
CheckEBR(i, le32(partition->lba_start));
continue;
}
if(le32(partition->block_count) > 0 && !IsExisting(le32(partition->lba_start)))
{
AddPartition(PartFromType(partition->type), le32(partition->lba_start),
le32(partition->block_count), (partition->status == PARTITION_BOOTABLE), partition->type, i);
}
}
MEM2_free(mbr);
return 0;
}
