public override void EraseDirectoryStructures(VolumeInfo info,
FileSystemEntriesEraseProgress callback)
{
using (FileStream stream = info.Open(FileAccess.ReadWrite, FileShare.ReadWrite))
{
int directoriesCleaned = 0;
FatApi api = GetFatApi(info, stream);
HashSet<uint> eraseQueueClusters = new HashSet<uint>();
List<FatDirectoryEntry> eraseQueue = new List<FatDirectoryEntry>();
{
FatDirectoryEntry entry = api.LoadDirectory(string.Empty);
eraseQueue.Add(entry);
eraseQueueClusters.Add(entry.Cluster);
}
using (VolumeLock volumeLock = info.LockVolume(stream))
{
while (eraseQueue.Count != 0)
{
if (callback != null)
callback(directoriesCleaned, directoriesCleaned + eraseQueue.Count);
FatDirectoryBase currentDir = api.LoadDirectory(eraseQueue[0].FullName);
eraseQueue.RemoveAt(0);
foreach (KeyValuePair<string, FatDirectoryEntry> entry in currentDir.Items)
if (entry.Value.EntryType == FatDirectoryEntryType.Directory)
{
if (eraseQueueClusters.Contains(entry.Value.Cluster))
continue;
eraseQueueClusters.Add(entry.Value.Cluster);
eraseQueue.Add(entry.Value);
}
currentDir.ClearDeletedEntries();
++directoriesCleaned;
}
}
}
}
