public FatDirectoryEntry CreateSub(Fat fat)
{
var chain = new ClusterChain(fat, false);
chain.SetChainLength(1);
var entry = FatDirectoryEntry.Create(true);
entry.SetStartCluster(chain.GetStartCluster());
var dir =
new ClusterChainDirectory(chain, false);
/* add "." entry */
var dot = FatDirectoryEntry.Create(true);
dot.SetShortName(ShortName.Dot);
dot.SetStartCluster(dir.GetStorageCluster());
CopyDateTimeFields(entry, dot);
dir.AddEntry(dot);
/* add ".." entry */
var dotDot = FatDirectoryEntry.Create(true);
dotDot.SetShortName(ShortName.DotDot);
dotDot.SetStartCluster(GetStorageCluster());
CopyDateTimeFields(entry, dotDot);
dir.AddEntry(dotDot);
dir.Flush();
return(entry);
}
/// <summary>
/// According to the FAT file system specification, leading and trailing
/// spaces in the name are ignored by this method.
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
/// <exception cref="IOException"></exception>
public IFsDirectoryEntry AddDirectory(string name)
{
CheckWritable();
CheckUniqueName(name);
name = name.Trim();
var sn = MakeShortName(name, true);
var real = Dir.CreateSub(fat);
real.SetShortName(sn);
var e = new FatLfnDirectoryEntry(this, real, name);
try {
Dir.AddEntries(e.CompactForm());
}
catch (IOException ex) {
var cc = new ClusterChain(fat, real.GetStartCluster(), false);
cc.SetChainLength(0);
Dir.RemoveEntry(real);
throw ex;
}
shortNameIndex.Add(sn, e);
longNameIndex.Add(name.ToLowerInvariant(), e);
GetDirectory(real);
Flush();
return(e);
}
/// <summary>
/// Remove the entry with the given name from this directory.
/// </summary>
/// <param name="name">the name of the entry to remove</param>
/// <exception cref="IOException">IOException on error removing the entry</exception>
/// <exception cref="InvalidOperationException">InvalidOperationException on an attempt to remove the dot entries</exception>
public void Remove(string name)
{
CheckWritable();
if (!(GetEntry(name) is FatLfnDirectoryEntry entry))
{
return;
}
UnlinkEntry(entry);
var cc = new ClusterChain(
fat, entry.RealEntry.GetStartCluster(), false);
cc.SetChainLength(0);
FreeUniqueName(name);
UpdateLfn();
}
public static ClusterChainDirectory CreateRoot(Fat fat)
{
if (fat.GetFatType() != FatType.BaseFat32)
{
throw new ArgumentException(
"only FAT32 stores root directory in a cluster chain");
}
var bs = (Fat32BootSector)fat.GetBootSector();
var cc = new ClusterChain(fat, false);
cc.SetChainLength(1);
bs.SetRootDirFirstCluster(cc.GetStartCluster());
var result =
new ClusterChainDirectory(cc, true);
result.Flush();
return(result);
}
public void Delete()
{
Chain.SetChainLength(0);
}
