/// <summary>
/// Links the specified entry to this directory, updating the entrie's
/// short name.
/// </summary>
/// <param name="entry">the entry to be linked (added) to this directory</param>
/// <seealso cref="UnlinkEntry(FatLfnDirectoryEntry)"/>
internal void LinkEntry(FatLfnDirectoryEntry entry)
{
CheckUniqueName(entry.GetName());
ShortName name;
name = dbg.Generate83BufferNew(entry.GetName());
entry.RealEntry.SetShortName(name);
longNameIndex.Add(entry.GetName().ToLowerInvariant(), entry);
shortNameIndex.Add(entry.RealEntry.GetShortName(), entry);
UpdateLfn();
}
/// <summary>
/// Unlinks the specified entry from this directory without actually
/// deleting it.
/// </summary>
/// <param name="entry">the entry to be unlinked</param>
/// <seealso cref="LinkEntry(FatLfnDirectoryEntry)"/>
internal void UnlinkEntry(FatLfnDirectoryEntry entry)
{
var sn = entry.RealEntry.GetShortName();
if (sn.Equals(ShortName.Dot) || sn.Equals(ShortName.DotDot))
{
throw
new ArgumentException(
"the dot entries can not be removed");
}
var lowerName = entry.GetName().ToLowerInvariant();
if (!longNameIndex.ContainsKey(lowerName))
{
throw new Exception();
}
longNameIndex.Remove(lowerName);
if (!shortNameIndex.ContainsKey(sn))
{
throw new Exception();
}
shortNameIndex.Remove(sn);
if (entry.IsFile())
{
entryToFile.Remove(entry.RealEntry);
}
else
{
entryToDirectory.Remove(entry.RealEntry);
}
}