public ReaderDirectory(IsoContext context, DirectoryRecord dirEntry)
: base(context, dirEntry)
{
byte[] buffer = new byte[IsoUtilities.SectorSize];
Stream extent = new ExtentStream(_context.DataStream, dirEntry.LocationOfExtent, uint.MaxValue, 0, 0);
_records = new List <DirectoryRecord>();
uint totalLength = dirEntry.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))
{
_records.Add(dr);
}
else if (dr.FileIdentifier == "\0")
{
_self = dr;
}
pos += length;
}
}
}