public CommonVolumeDescriptor(byte[] src, int offset, Encoding enc)
: base(src, offset)
{
CharacterEncoding = enc;
SystemIdentifier = IsoUtilities.ReadChars(src, offset + 8, 32, CharacterEncoding);
VolumeIdentifier = IsoUtilities.ReadChars(src, offset + 40, 32, CharacterEncoding);
VolumeSpaceSize = IsoUtilities.ToUInt32FromBoth(src, offset + 80);
VolumeSetSize = IsoUtilities.ToUInt16FromBoth(src, offset + 120);
VolumeSequenceNumber = IsoUtilities.ToUInt16FromBoth(src, offset + 124);
LogicalBlockSize = IsoUtilities.ToUInt16FromBoth(src, offset + 128);
PathTableSize = IsoUtilities.ToUInt32FromBoth(src, offset + 132);
TypeLPathTableLocation = Utilities.ToUInt32LittleEndian(src, offset + 140);
OptionalTypeLPathTableLocation = Utilities.ToUInt32LittleEndian(src, offset + 144);
TypeMPathTableLocation = Utilities.BitSwap(Utilities.ToUInt32LittleEndian(src, offset + 148));
OptionalTypeMPathTableLocation = Utilities.BitSwap(Utilities.ToUInt32LittleEndian(src, offset + 152));
DirectoryRecord.ReadFrom(src, offset + 156, CharacterEncoding, out RootDirectory);
VolumeSetIdentifier = IsoUtilities.ReadChars(src, offset + 190, 318 - 190, CharacterEncoding);
PublisherIdentifier = IsoUtilities.ReadChars(src, offset + 318, 446 - 318, CharacterEncoding);
DataPreparerIdentifier = IsoUtilities.ReadChars(src, offset + 446, 574 - 446, CharacterEncoding);
ApplicationIdentifier = IsoUtilities.ReadChars(src, offset + 574, 702 - 574, CharacterEncoding);
CopyrightFileIdentifier = IsoUtilities.ReadChars(src, offset + 702, 739 - 702, CharacterEncoding);
AbstractFileIdentifier = IsoUtilities.ReadChars(src, offset + 739, 776 - 739, CharacterEncoding);
BibliographicFileIdentifier = IsoUtilities.ReadChars(src, offset + 776, 813 - 776, CharacterEncoding);
CreationDateAndTime = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(src, offset + 813);
ModificationDateAndTime = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(src, offset + 830);
ExpirationDateAndTime = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(src, offset + 847);
EffectiveDateAndTime = IsoUtilities.ToDateTimeFromVolumeDescriptorTime(src, offset + 864);
FileStructureVersion = src[offset + 881];
}
private static DirectoryRecord ReadRootSelfRecord(IsoContext context)
{
context.DataStream.Position = context.VolumeDescriptor.RootDirectory.LocationOfExtent * context.VolumeDescriptor.LogicalBlockSize;
byte[] firstSector = Utilities.ReadFully(context.DataStream, context.VolumeDescriptor.LogicalBlockSize);
DirectoryRecord rootSelfRecord;
DirectoryRecord.ReadFrom(firstSector, 0, context.VolumeDescriptor.CharacterEncoding, out rootSelfRecord);
return(rootSelfRecord);
}
public ReaderDirectory(IsoContext context, ReaderDirEntry dirEntry)
: base(context, dirEntry)
{
byte[] buffer = new byte[IsoUtilities.SectorSize];
Stream extent = new ExtentStream(_context.DataStream, dirEntry.Record.LocationOfExtent, uint.MaxValue, 0, 0);
_records = new List <ReaderDirEntry>();
uint totalLength = dirEntry.Record.DataLength;
uint totalRead = 0;
while (totalRead < totalLength)
{
int toRead = (int)Math.Min(buffer.Length, totalLength - totalRead);
uint bytesRead = (uint)Utilities.ReadFully(extent, buffer, 0, toRead);
if (bytesRead != toRead)
{
throw new IOException("Failed to read whole directory");
}
totalRead += (uint)bytesRead;
uint pos = 0;
while (pos < bytesRead && buffer[pos] != 0)
{
DirectoryRecord dr;
uint length = (uint)DirectoryRecord.ReadFrom(buffer, (int)pos, context.VolumeDescriptor.CharacterEncoding, out dr);
if (!IsoUtilities.IsSpecialDirectory(dr))
{
ReaderDirEntry childDirEntry = new ReaderDirEntry(_context, dr);
if (context.SuspDetected && !string.IsNullOrEmpty(context.RockRidgeIdentifier))
{
if (childDirEntry.SuspRecords == null || !childDirEntry.SuspRecords.HasEntry(context.RockRidgeIdentifier, "RE"))
{
_records.Add(childDirEntry);
}
}
else
{
_records.Add(childDirEntry);
}
}
else if (dr.FileIdentifier == "\0")
{
_self = new ReaderDirEntry(_context, dr);
}
pos += length;
}
}
}
public ReaderDirEntry(IsoContext context, DirectoryRecord dirRecord)
{
_context = context;
_record = dirRecord;
_fileName = _record.FileIdentifier;
if (context.SuspDetected && _record.SystemUseData != null)
{
_suspRecords = new SuspRecords(_context, _record.SystemUseData, 0);
}
if (!string.IsNullOrEmpty(_context.RockRidgeIdentifier))
{
// 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 = Utilities.ReadFully(_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 (!string.IsNullOrEmpty(_context.RockRidgeIdentifier))
{
FileTimeSystemUseEntry tfEntry = _suspRecords.GetEntry <FileTimeSystemUseEntry>(_context.RockRidgeIdentifier, "TF");
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;
}
}
}
