public static byte[] ReadExtent(UdfContext context, LongAllocationDescriptor extent)
{
LogicalPartition partition = context.LogicalPartitions[extent.ExtentLocation.Partition];
long pos = extent.ExtentLocation.LogicalBlock * partition.LogicalBlockSize;
return(Utilities.ReadFully(partition.Content, pos, (int)extent.ExtentLength));
}
public File(UdfContext context, Partition partition, FileEntry fileEntry, uint blockSize)
{
_context = context;
_partition = partition;
_fileEntry = fileEntry;
_blockSize = blockSize;
}
public MetadataPartition(UdfContext context, LogicalVolumeDescriptor volumeDescriptor, MetadataPartitionMap partitionMap)
: base(context, volumeDescriptor)
{
_partitionMap = partitionMap;
PhysicalPartition physical = context.PhysicalPartitions[partitionMap.PartitionNumber];
long fileEntryPos = partitionMap.MetadataFileLocation * (long)volumeDescriptor.LogicalBlockSize;
byte[] entryData = Utilities.ReadFully(physical.Content, fileEntryPos, _context.PhysicalSectorSize);
if (!DescriptorTag.IsValid(entryData, 0))
{
throw new IOException("Invalid descriptor tag looking for Metadata file entry");
}
DescriptorTag dt = Utilities.ToStruct <DescriptorTag>(entryData, 0);
if (dt.TagIdentifier == TagIdentifier.ExtendedFileEntry)
{
ExtendedFileEntry efe = Utilities.ToStruct <ExtendedFileEntry>(entryData, 0);
_metadataFile = new File(context, physical, efe, _volumeDescriptor.LogicalBlockSize);
}
else
{
throw new NotImplementedException("Only EFE implemented for Metadata file entry");
}
}
public Directory(UdfContext context, LogicalPartition partition, FileEntry fileEntry)
: base(context, partition, fileEntry, (uint)partition.LogicalBlockSize)
{
if (FileContent.Capacity > int.MaxValue)
{
throw new NotImplementedException("Very large directory");
}
_entries = new List <FileIdentifier>();
byte[] contentBytes = Utilities.ReadFully(FileContent, 0, (int)FileContent.Capacity);
int pos = 0;
while (pos < contentBytes.Length)
{
FileIdentifier id = new FileIdentifier();
int size = id.ReadFrom(contentBytes, pos);
if ((id.FileCharacteristics & (FileCharacteristic.Deleted | FileCharacteristic.Parent)) == 0)
{
_entries.Add(id);
}
pos += size;
}
}
public FileContentBuffer(UdfContext context, Partition partition, FileEntry fileEntry, uint blockSize)
{
_context = context;
_partition = partition;
_fileEntry = fileEntry;
_blockSize = blockSize;
LoadExtents();
}
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 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");
}
}
protected LogicalPartition(UdfContext context, LogicalVolumeDescriptor volumeDescriptor)
{
_context = context;
_volumeDescriptor = volumeDescriptor;
}