public override int Parse(byte[] buffer, int offset)
{
VolumeDescriptorSequenceNumber = Utilities.ToUInt32LittleEndian(buffer, offset + 16);
DescriptorCharset = Utilities.ToByteArray(buffer, offset + 20, 64);
LogicalVolumeIdentifier = UdfUtilities.ReadDString(buffer, offset + 84, 128);
LogicalBlockSize = Utilities.ToUInt32LittleEndian(buffer, offset + 212);
DomainIdentifier = Utilities.ToStruct <DomainEntityIdentifier>(buffer, offset + 216);
LogicalVolumeContentsUse = Utilities.ToByteArray(buffer, offset + 248, 16);
MapTableLength = Utilities.ToUInt32LittleEndian(buffer, offset + 264);
NumPartitionMaps = Utilities.ToUInt32LittleEndian(buffer, offset + 268);
ImplementationIdentifier = Utilities.ToStruct <ImplementationEntityIdentifier>(buffer, offset + 272);
ImplementationUse = Utilities.ToByteArray(buffer, offset + 304, 128);
IntegritySequenceExtent = new ExtentDescriptor();
IntegritySequenceExtent.ReadFrom(buffer, offset + 432);
int pmOffset = 0;
PartitionMaps = new PartitionMap[NumPartitionMaps];
for (int i = 0; i < NumPartitionMaps; ++i)
{
PartitionMaps[i] = PartitionMap.CreateFrom(buffer, offset + 440 + pmOffset);
pmOffset += PartitionMaps[i].Size;
}
return(440 + (int)MapTableLength);
}
public static LogicalPartition FromDescriptor(UdfContext context, LogicalVolumeDescriptor volumeDescriptor, int index)
{
PartitionMap map = volumeDescriptor.PartitionMaps[index];
Type1PartitionMap asType1 = map as Type1PartitionMap;
if (asType1 != null)
{
return(new Type1Partition(context, volumeDescriptor, asType1));
}
MetadataPartitionMap asMetadata = map as MetadataPartitionMap;
if (asMetadata != null)
{
return(new MetadataPartition(context, volumeDescriptor, asMetadata));
}
throw new NotImplementedException("Unrecognized partition map type");
}
public static PartitionMap CreateFrom(byte[] buffer, int offset)
{
PartitionMap result = null;
byte type = buffer[offset];
if (type == 1)
{
result = new Type1PartitionMap();
}
else if (type == 2)
{
EntityIdentifier id = Utilities.ToStruct <UdfEntityIdentifier>(buffer, offset + 4);
switch (id.Identifier)
{
case "*UDF Virtual Partition":
result = new VirtualPartitionMap();
break;
case "*UDF Sparable Partition":
result = new SparablePartitionMap();
break;
case "*UDF Metadata Partition":
result = new MetadataPartitionMap();
break;
default:
throw new InvalidDataException("Unrecognized partition map entity id: " + id);
}
}
if (result != null)
{
result.ReadFrom(buffer, offset);
}
return(result);
}