private static void InitializeSusp(IsoContext context, DirectoryRecord rootSelfRecord)
{
// Stage 1 - SUSP present?
List <SuspExtension> extensions = new List <SuspExtension>();
if (!SuspRecords.DetectSharingProtocol(rootSelfRecord.SystemUseData, 0))
{
context.SuspExtensions = new List <SuspExtension>();
context.SuspDetected = false;
return;
}
context.SuspDetected = true;
SuspRecords suspRecords = new SuspRecords(context, rootSelfRecord.SystemUseData, 0);
// Stage 2 - Init general SUSP params
SharingProtocolSystemUseEntry spEntry =
(SharingProtocolSystemUseEntry)suspRecords.GetEntries(null, "SP")[0];
context.SuspSkipBytes = spEntry.SystemAreaSkip;
// Stage 3 - Init extensions
List <SystemUseEntry> extensionEntries = suspRecords.GetEntries(null, "ER");
if (extensionEntries != null)
{
foreach (ExtensionSystemUseEntry extension in extensionEntries)
{
switch (extension.ExtensionIdentifier)
{
case "RRIP_1991A":
case "IEEE_P1282":
case "IEEE_1282":
extensions.Add(new RockRidgeExtension(extension.ExtensionIdentifier));
context.RockRidgeIdentifier = extension.ExtensionIdentifier;
break;
default:
extensions.Add(new GenericSuspExtension(extension.ExtensionIdentifier));
break;
}
}
}
else if (suspRecords.GetEntries(null, "RR") != null)
{
// Some ISO creators don't add the 'ER' record for RockRidge, but write the (legacy)
// RR record anyway
extensions.Add(new RockRidgeExtension("RRIP_1991A"));
context.RockRidgeIdentifier = "RRIP_1991A";
}
context.SuspExtensions = extensions;
}
public ReaderDirEntry(IsoContext context, DirectoryRecord dirRecord)
{
_context = context;
_record = dirRecord;
_fileName = _record.FileIdentifier;
bool rockRidge = !string.IsNullOrEmpty(_context.RockRidgeIdentifier);
if (context.SuspDetected && _record.SystemUseData != null)
{
SuspRecords = new SuspRecords(_context, _record.SystemUseData, 0);
}
if (rockRidge && SuspRecords != null)
{
// The full name is taken from this record, even if it's a child-link record
List <SystemUseEntry> nameEntries = SuspRecords.GetEntries(_context.RockRidgeIdentifier, "NM");
StringBuilder rrName = new StringBuilder();
if (nameEntries != null && nameEntries.Count > 0)
{
foreach (PosixNameSystemUseEntry nameEntry in nameEntries)
{
rrName.Append(nameEntry.NameData);
}
_fileName = rrName.ToString();
}
// If this is a Rock Ridge child link, replace the dir record with that from the 'self' record
// in the child directory.
ChildLinkSystemUseEntry clEntry =
SuspRecords.GetEntry <ChildLinkSystemUseEntry>(_context.RockRidgeIdentifier, "CL");
if (clEntry != null)
{
_context.DataStream.Position = clEntry.ChildDirLocation * _context.VolumeDescriptor.LogicalBlockSize;
byte[] firstSector = StreamUtilities.ReadExact(_context.DataStream,
_context.VolumeDescriptor.LogicalBlockSize);
DirectoryRecord.ReadFrom(firstSector, 0, _context.VolumeDescriptor.CharacterEncoding, out _record);
if (_record.SystemUseData != null)
{
SuspRecords = new SuspRecords(_context, _record.SystemUseData, 0);
}
}
}
LastAccessTimeUtc = _record.RecordingDateAndTime;
LastWriteTimeUtc = _record.RecordingDateAndTime;
CreationTimeUtc = _record.RecordingDateAndTime;
if (rockRidge && SuspRecords != null)
{
FileTimeSystemUseEntry tfEntry =
SuspRecords.GetEntry <FileTimeSystemUseEntry>(_context.RockRidgeIdentifier, "TF");
if (tfEntry != null)
{
if ((tfEntry.TimestampsPresent & FileTimeSystemUseEntry.Timestamps.Access) != 0)
{
LastAccessTimeUtc = tfEntry.AccessTime;
}
if ((tfEntry.TimestampsPresent & FileTimeSystemUseEntry.Timestamps.Modify) != 0)
{
LastWriteTimeUtc = tfEntry.ModifyTime;
}
if ((tfEntry.TimestampsPresent & FileTimeSystemUseEntry.Timestamps.Creation) != 0)
{
CreationTimeUtc = tfEntry.CreationTime;
}
}
}
}
