internal Directory CreateChildDirectory(string normalizedName)
{
long id = FindEntryByNormalizedName(normalizedName);
if (id >= 0)
{
if ((_entries[id].Attributes & FatAttributes.Directory) == 0)
{
throw new IOException("A file exists with the same name");
}
else
{
return(_fileSystem.GetDirectory(this, id));
}
}
else
{
try
{
uint firstCluster;
if (!_fileSystem.Fat.TryGetFreeCluster(out firstCluster))
{
throw new IOException("Failed to allocate first cluster for new directory");
}
_fileSystem.Fat.SetEndOfChain(firstCluster);
DirectoryEntry newEntry = new DirectoryEntry(_fileSystem.FatOptions, normalizedName, FatAttributes.Directory);
newEntry.FirstCluster = firstCluster;
newEntry.CreationTime = _fileSystem.ConvertFromUtc(DateTime.UtcNow);
newEntry.LastWriteTime = newEntry.CreationTime;
id = AddEntry(newEntry);
PopulateNewChildDirectory(newEntry);
// Rather than just creating a new instance, pull it through the fileSystem cache
// to ensure the cache model is preserved.
return(_fileSystem.GetDirectory(this, id));
}
finally
{
_fileSystem.Fat.Flush();
}
}
}
