public override int ReadFrom(byte[] buffer, int offset)
{
DescriptorTag = Utilities.ToStruct <DescriptorTag>(buffer, offset);
InformationControlBlock = Utilities.ToStruct <InformationControlBlock>(buffer, offset + 16);
Uid = Utilities.ToUInt32LittleEndian(buffer, offset + 36);
Gid = Utilities.ToUInt32LittleEndian(buffer, offset + 40);
Permissions = (FilePermissions)Utilities.ToUInt32LittleEndian(buffer, offset + 44);
FileLinkCount = Utilities.ToUInt16LittleEndian(buffer, offset + 48);
RecordFormat = buffer[offset + 50];
RecordDisplayAttributes = buffer[offset + 51];
RecordLength = Utilities.ToUInt16LittleEndian(buffer, offset + 52);
InformationLength = Utilities.ToUInt64LittleEndian(buffer, offset + 56);
ObjectSize = Utilities.ToUInt64LittleEndian(buffer, offset + 64);
LogicalBlocksRecorded = Utilities.ToUInt64LittleEndian(buffer, offset + 72);
AccessTime = UdfUtilities.ParseTimestamp(buffer, offset + 80);
ModificationTime = UdfUtilities.ParseTimestamp(buffer, offset + 92);
CreationTime = UdfUtilities.ParseTimestamp(buffer, offset + 104);
AttributeTime = UdfUtilities.ParseTimestamp(buffer, offset + 116);
Checkpoint = Utilities.ToUInt32LittleEndian(buffer, offset + 128);
ExtendedAttributeIcb = Utilities.ToStruct <LongAllocationDescriptor>(buffer, offset + 136);
StreamDirectoryIcb = Utilities.ToStruct <LongAllocationDescriptor>(buffer, offset + 152);
ImplementationIdentifier = Utilities.ToStruct <ImplementationEntityIdentifier>(buffer, offset + 168);
UniqueId = Utilities.ToUInt64LittleEndian(buffer, offset + 200);
ExtendedAttributesLength = Utilities.ToInt32LittleEndian(buffer, offset + 208);
AllocationDescriptorsLength = Utilities.ToInt32LittleEndian(buffer, offset + 212);
AllocationDescriptors = Utilities.ToByteArray(buffer, offset + 216 + ExtendedAttributesLength, AllocationDescriptorsLength);
byte[] eaData = Utilities.ToByteArray(buffer, offset + 216, ExtendedAttributesLength);
ExtendedAttributes = ReadExtendedAttributes(eaData);
return((int)(216 + ExtendedAttributesLength + AllocationDescriptorsLength));
}
public override int Parse(byte[] buffer, int offset)
{
VolumeDescriptorSequenceNumber = Utilities.ToUInt32LittleEndian(buffer, offset + 16);
PrimaryVolumeDescriptorNumber = Utilities.ToUInt32LittleEndian(buffer, offset + 20);
VolumeIdentifier = UdfUtilities.ReadDString(buffer, offset + 24, 32);
VolumeSequenceNumber = Utilities.ToUInt16LittleEndian(buffer, offset + 56);
MaxVolumeSquenceNumber = Utilities.ToUInt16LittleEndian(buffer, offset + 58);
InterchangeLevel = Utilities.ToUInt16LittleEndian(buffer, offset + 60);
MaxInterchangeLevel = Utilities.ToUInt16LittleEndian(buffer, offset + 62);
CharacterSetList = Utilities.ToUInt32LittleEndian(buffer, offset + 64);
MaxCharacterSetList = Utilities.ToUInt32LittleEndian(buffer, offset + 68);
VolumeSetIdentifier = UdfUtilities.ReadDString(buffer, offset + 72, 128);
DescriptorCharSet = Utilities.ToStruct <CharacterSetSpecification>(buffer, offset + 200);
ExplanatoryCharSet = Utilities.ToStruct <CharacterSetSpecification>(buffer, offset + 264);
VolumeAbstractExtent = new ExtentDescriptor();
VolumeAbstractExtent.ReadFrom(buffer, offset + 328);
VolumeCopyrightNoticeExtent = new ExtentDescriptor();
VolumeCopyrightNoticeExtent.ReadFrom(buffer, offset + 336);
ApplicationIdentifier = Utilities.ToStruct <ApplicationEntityIdentifier>(buffer, offset + 344);
RecordingTime = UdfUtilities.ParseTimestamp(buffer, offset + 376);
ImplementationIdentifier = Utilities.ToStruct <ImplementationEntityIdentifier>(buffer, offset + 388);
ImplementationUse = Utilities.ToByteArray(buffer, offset + 420, 64);
PredecessorVolumeDescriptorSequenceLocation = Utilities.ToUInt32LittleEndian(buffer, offset + 484);
Flags = Utilities.ToUInt16LittleEndian(buffer, offset + 488);
return(512);
}
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 int ReadFrom(byte[] buffer, int offset)
{
DescriptorTag = Utilities.ToStruct <DescriptorTag>(buffer, offset);
FileVersionNumber = Utilities.ToUInt16LittleEndian(buffer, offset + 16);
FileCharacteristics = (FileCharacteristic)buffer[offset + 18];
NameLength = buffer[offset + 19];
FileLocation = Utilities.ToStruct <LongAllocationDescriptor>(buffer, offset + 20);
ImplementationUseLength = Utilities.ToUInt16LittleEndian(buffer, offset + 36);
ImplementationUse = Utilities.ToByteArray(buffer, offset + 38, ImplementationUseLength);
Name = UdfUtilities.ReadDCharacters(buffer, offset + 38 + ImplementationUseLength, NameLength);
return(Utilities.RoundUp(38 + ImplementationUseLength + NameLength, 4));
}
public int ReadFrom(byte[] buffer, int offset)
{
if (!DescriptorTag.IsValid(buffer, offset))
{
throw new InvalidDataException("Invalid Anchor Volume Descriptor Pointer (invalid tag)");
}
Tag = new DescriptorTag();
Tag.ReadFrom(buffer, offset);
if (UdfUtilities.ComputeCrc(buffer, offset + Tag.Size, Tag.DescriptorCrcLength) != Tag.DescriptorCrc)
{
throw new InvalidDataException("Invalid Anchor Volume Descriptor Pointer (invalid CRC)");
}
return(Parse(buffer, offset));
}
public int ReadFrom(byte[] buffer, int offset)
{
DescriptorTag = Utilities.ToStruct <DescriptorTag>(buffer, offset);
RecordingTime = UdfUtilities.ParseTimestamp(buffer, offset + 16);
InterchangeLevel = Utilities.ToUInt16LittleEndian(buffer, offset + 28);
MaximumInterchangeLevel = Utilities.ToUInt16LittleEndian(buffer, offset + 30);
CharacterSetList = Utilities.ToUInt32LittleEndian(buffer, offset + 32);
MaximumCharacterSetList = Utilities.ToUInt32LittleEndian(buffer, offset + 36);
FileSetNumber = Utilities.ToUInt32LittleEndian(buffer, offset + 40);
FileSetDescriptorNumber = Utilities.ToUInt32LittleEndian(buffer, offset + 44);
LogicalVolumeIdentifierCharset = Utilities.ToStruct <CharacterSetSpecification>(buffer, offset + 48);
LogicalVolumeIdentifier = UdfUtilities.ReadDString(buffer, offset + 112, 128);
FileSetCharset = Utilities.ToStruct <CharacterSetSpecification>(buffer, offset + 240);
FileSetIdentifier = UdfUtilities.ReadDString(buffer, offset + 304, 32);
CopyrightFileIdentifier = UdfUtilities.ReadDString(buffer, offset + 336, 32);
AbstractFileIdentifier = UdfUtilities.ReadDString(buffer, offset + 368, 32);
RootDirectoryIcb = Utilities.ToStruct <LongAllocationDescriptor>(buffer, offset + 400);
DomainIdentifier = Utilities.ToStruct <DomainEntityIdentifier>(buffer, offset + 416);
NextExtent = Utilities.ToStruct <LongAllocationDescriptor>(buffer, offset + 448);
SystemStreamDirectoryIcb = Utilities.ToStruct <LongAllocationDescriptor>(buffer, offset + 464);
return(512);
}
public static File FromDescriptor(UdfContext context, LongAllocationDescriptor icb)
{
LogicalPartition partition = context.LogicalPartitions[icb.ExtentLocation.Partition];
byte[] rootDirData = UdfUtilities.ReadExtent(context, icb);
DescriptorTag rootDirTag = Utilities.ToStruct <DescriptorTag>(rootDirData, 0);
if (rootDirTag.TagIdentifier == TagIdentifier.ExtendedFileEntry)
{
ExtendedFileEntry fileEntry = Utilities.ToStruct <ExtendedFileEntry>(rootDirData, 0);
if (fileEntry.InformationControlBlock.FileType == FileType.Directory)
{
return(new Directory(context, partition, fileEntry));
}
else
{
return(new File(context, partition, fileEntry, (uint)partition.LogicalBlockSize));
}
}
else if (rootDirTag.TagIdentifier == TagIdentifier.FileEntry)
{
FileEntry fileEntry = Utilities.ToStruct <FileEntry>(rootDirData, 0);
if (fileEntry.InformationControlBlock.FileType == FileType.Directory)
{
return(new Directory(context, partition, fileEntry));
}
else
{
return(new File(context, partition, fileEntry, (uint)partition.LogicalBlockSize));
}
}
else
{
throw new NotImplementedException("Only ExtendedFileEntries implemented");
}
}
private void Initialize()
{
Context = new UdfContext()
{
PhysicalPartitions = new Dictionary <ushort, PhysicalPartition>(),
PhysicalSectorSize = (int)_sectorSize,
LogicalPartitions = new List <LogicalPartition>(),
};
IBuffer dataBuffer = new StreamBuffer(_data, Ownership.None);
AnchorVolumeDescriptorPointer avdp = AnchorVolumeDescriptorPointer.FromStream(_data, 256, _sectorSize);
uint sector = avdp.MainDescriptorSequence.Location;
bool terminatorFound = false;
while (!terminatorFound)
{
_data.Position = sector * (long)_sectorSize;
DescriptorTag dt;
if (!DescriptorTag.TryFromStream(_data, out dt))
{
break;
}
switch (dt.TagIdentifier)
{
case TagIdentifier.PrimaryVolumeDescriptor:
_pvd = PrimaryVolumeDescriptor.FromStream(_data, sector, _sectorSize);
break;
case TagIdentifier.ImplementationUseVolumeDescriptor:
// Not used
break;
case TagIdentifier.PartitionDescriptor:
PartitionDescriptor pd = PartitionDescriptor.FromStream(_data, sector, _sectorSize);
if (Context.PhysicalPartitions.ContainsKey(pd.PartitionNumber))
{
throw new IOException("Duplicate partition number reading UDF Partition Descriptor");
}
Context.PhysicalPartitions[pd.PartitionNumber] = new PhysicalPartition(pd, dataBuffer, _sectorSize);
break;
case TagIdentifier.LogicalVolumeDescriptor:
_lvd = LogicalVolumeDescriptor.FromStream(_data, sector, _sectorSize);
break;
case TagIdentifier.UnallocatedSpaceDescriptor:
// Not used for reading
break;
case TagIdentifier.TerminatingDescriptor:
terminatorFound = true;
break;
default:
break;
}
sector++;
}
// Convert logical partition descriptors into actual partition objects
for (int i = 0; i < _lvd.PartitionMaps.Length; ++i)
{
Context.LogicalPartitions.Add(LogicalPartition.FromDescriptor(Context, _lvd, i));
}
byte[] fsdBuffer = UdfUtilities.ReadExtent(Context, _lvd.FileSetDescriptorLocation);
if (DescriptorTag.IsValid(fsdBuffer, 0))
{
FileSetDescriptor fsd = Utilities.ToStruct <FileSetDescriptor>(fsdBuffer, 0);
RootDirectory = (Directory)File.FromDescriptor(Context, fsd.RootDirectoryIcb);
}
}