public Partition( Device device, MBRPartitionEntry entry )
{
this.device = device;
partition_id = entry.id;
partition_start = ( Int64 ) entry.start_lba * ( Int64 ) device.SectorSize;
partition_length = ( Int64 ) entry.size_lba * ( Int64 ) device.SectorSize;
}
public Partition( Device device, MBRPartitionEntry entry )
{
this.device = device;
partition_id = entry.id;
partition_start = ( Int64 ) entry.start_lba * ( Int64 ) device.SectorSize;
partition_length = ( Int64 ) entry.size_lba * ( Int64 ) device.SectorSize;
}
public static FileSystem GetFileSystem( Device device, MBRPartitionEntry entry )
{
return new Ext( device, entry );
}
public List <FileSystem> GetFileSystems()
{
List <FileSystem> filesystems = new List <FileSystem>();
if (stream == null || !stream.CanRead)
{
return(filesystems);
}
Byte[] sector = new Byte[sector_size];
stream.Read(sector, 0, (int)sector_size);
if (sector[510] != 0x55 || sector[511] != 0xaa)
{
return(filesystems); // mbr magic number missing
}
List <MBRPartitionEntry> mbr_partitions = new List <MBRPartitionEntry>();
MBRPartitionEntry current_partition;
int partition_id = 0;
for (UInt32 i = 0; i < 4; i++)
{
current_partition = new MBRPartitionEntry();
current_partition.Parse(sector, 446 + i * 16);
if (known_partition_types.Contains(current_partition.type)) // known
{
current_partition.id = partition_id;
mbr_partitions.Add(current_partition);
++partition_id;
}
else if (current_partition.type == PartitionType.Extended) // extended partition: contains others
{
Byte[] extended_sector = new Byte[sector_size];
MBRPartitionEntry extended_entry = new MBRPartitionEntry();
MBRPartitionEntry extended_next = new MBRPartitionEntry();
do
{
stream.Seek((( Int64 )current_partition.start_lba + ( Int64 )extended_next.start_lba) * ( Int64 )sector_size, SeekOrigin.Begin);
stream.Read(extended_sector, 0, (int)sector_size);
extended_entry.Parse(extended_sector, 446);
extended_entry.start_lba += current_partition.start_lba + extended_next.start_lba;
extended_next.Parse(extended_sector, 446 + 16);
if (known_partition_types.Contains(extended_entry.type))
{
extended_entry.id = partition_id;
mbr_partitions.Add(extended_entry);
extended_entry = new MBRPartitionEntry();
}
++partition_id;
} while (extended_next.size_lba != 0);
}
else // unknown
{
++partition_id;
}
}
foreach (MBRPartitionEntry mbr_entry in mbr_partitions)
{
FileSystem fs = null;
switch (mbr_entry.type)
{
case PartitionType.Ext:
{
FileSystem temp = null;
try
{
temp = new Ext(this, mbr_entry);
fs = temp;
}
catch (Exception) {}
break;
}
}
if (fs != null)
{
filesystems.Add(fs);
}
}
return(filesystems);
}
public List<FileSystem> GetFileSystems()
{
List< FileSystem > filesystems = new List< FileSystem >();
if ( stream == null || !stream.CanRead ) return filesystems;
Byte[] sector = new Byte[ sector_size ];
stream.Read( sector, 0, (int)sector_size );
if ( sector[ 510 ] != 0x55 || sector[ 511 ] != 0xaa ) return filesystems; // mbr magic number missing
List< MBRPartitionEntry > mbr_partitions = new List< MBRPartitionEntry >();
MBRPartitionEntry current_partition;
int partition_id = 0;
for ( UInt32 i=0; i<4; i++ )
{
current_partition = new MBRPartitionEntry();
current_partition.Parse( sector, 446 + i*16 );
if ( known_partition_types.Contains( current_partition.type ) ) // known
{
current_partition.id = partition_id;
mbr_partitions.Add( current_partition );
++partition_id;
}
else if ( current_partition.type == PartitionType.Extended ) // extended partition: contains others
{
Byte[] extended_sector = new Byte[ sector_size ];
MBRPartitionEntry extended_entry = new MBRPartitionEntry();
MBRPartitionEntry extended_next = new MBRPartitionEntry();
do
{
stream.Seek( ( ( Int64 ) current_partition.start_lba + ( Int64 ) extended_next.start_lba ) * ( Int64 ) sector_size, SeekOrigin.Begin );
stream.Read( extended_sector, 0, (int)sector_size );
extended_entry.Parse( extended_sector, 446 );
extended_entry.start_lba += current_partition.start_lba + extended_next.start_lba;
extended_next.Parse( extended_sector, 446 + 16 );
if ( known_partition_types.Contains( extended_entry.type ) )
{
extended_entry.id = partition_id;
mbr_partitions.Add( extended_entry );
extended_entry = new MBRPartitionEntry();
}
++partition_id;
} while ( extended_next.size_lba != 0 );
}
else // unknown
{
++partition_id;
}
}
foreach ( MBRPartitionEntry mbr_entry in mbr_partitions )
{
FileSystem fs = null;
switch ( mbr_entry.type )
{
case PartitionType.Ext:
{
FileSystem temp = null;
try
{
temp = new Ext( this, mbr_entry );
fs = temp;
}
catch ( Exception ) {}
break;
}
}
if ( fs != null ) filesystems.Add( fs );
}
return filesystems;
}
public static FileSystem GetFileSystem( Device device, MBRPartitionEntry entry )
{
return new Ext( device, entry );
}
