/// <summary>
/// Fetch a directory to build the internal index (recursive)
/// </summary>
private void AddDirectoryToIndex(DataTrackIndexEntry indexDirectoryEntry)
{
DirectoryEntry entry;
DataTrackIndexEntry indexEntry;
long lba = indexDirectoryEntry.DirectoryEntry.ExtentLba;
long size = indexDirectoryEntry.DirectoryEntry.ExtentSize;
int sectorsCount = (int)(size / GetSectorDataSize(_defaultSectorMode));
var stream = new CBinaryReader(ReadSectors(lba, sectorsCount, _defaultSectorMode));
// First directory entry of a directory entry is the directory itself, so let's skip it
ReadDirectoryEntry(stream);
// Second directory entry is the parent directory entry.
// As we parse the data from root to children, it has already been handled, so let's skip it too
ReadDirectoryEntry(stream);
while (stream.Position < size)
{
short b = stream.TestByte();
if (b == 0)
{
// DirectoryEntry cannot be "splitted" on two sectors
int dataSize = GetSectorDataSize(_defaultSectorMode);
stream.Position = (((stream.Position / dataSize) + 1) * dataSize);
b = stream.TestByte();
}
if (b <= 0)
{
break;
}
else
{
entry = ReadDirectoryEntry(stream);
indexEntry = new DataTrackIndexEntry(indexDirectoryEntry, entry);
_index.AddToIndex(indexEntry);
if (indexEntry.IsDirectory)
{
AddDirectoryToIndex(indexEntry);
}
}
}
stream.CloseAndDispose();
}