private Win32Returncode pLastErrorCode; // always returns an error code that best fits.
public PathResolver(IFuserFilesystemDirectory root, string path)
{
this.pPath = null;
this.pFileitem = null;
this.pPathInvalid = true;
this.pLastErrorCode = Win32Returncode.DEFAULT_UNKNOWN_ERROR;
resolve(root, path);
}
private void resolve(IFuserFilesystemDirectory root, string path)
{
FuserPathResolveResult vpr = null;
try {
vpr = ResolvePath(root, path);
this.pPath = vpr;
if (vpr.returncode != Win32Returncode.SUCCESS)
{
this.pPathInvalid = true;
this.pLastErrorCode = vpr.returncode;
return;
}
} catch {
// should never occur
this.pPathInvalid = true;
this.pLastErrorCode = Win32Returncode.ERROR_PATH_NOT_FOUND;
this.pPath = null;
return;
}
if (vpr != null)
{
if (vpr.HasError)
{
vpr = null;
}
}
if (vpr != null)
{
if (vpr.returncode != Win32Returncode.SUCCESS)
{
vpr = null;
}
}
if (vpr == null)
{
this.pPathInvalid = true;
this.pLastErrorCode = Win32Returncode.ERROR_PATH_NOT_FOUND;
this.pPath = null;
}
else
{
this.pPathInvalid = false;
this.pLastErrorCode = Win32Returncode.DEFAULT_UNKNOWN_ERROR;
this.pFileitem = null;
if (vpr.currentDirectory == root && vpr.itemname == "")
{
this.pFileitem = root;
}
else
{
if (vpr.itemname == "")
{
// path not found
this.pLastErrorCode = Win32Returncode.ERROR_PATH_NOT_FOUND;
this.pPathInvalid = true;
}
else
{
try {
lock (vpr.currentDirectory) {
this.pFileitem = vpr.currentDirectory.GetItem(vpr.itemname);
}
} catch {
this.pFileitem = null;
}
}
}
}
}
private FuserPathResolveResult ResolvePath(IFuserFilesystemDirectory root, string path)
{
FuserPathResolveResult ret = new FuserPathResolveResult(root, path);
IFuserFilesystemDirectory currentdirectory = root;
IFuserFilesystemItem vItem;
string lastItem = "";
string p;
if (path == "")
{
return(new FuserPathResolveResult(new FSException(Win32Returncode.ERROR_INVALID_NAME)));
}
if (path.Length < 1)
{
return(new FuserPathResolveResult(new FSException(Win32Returncode.ERROR_INVALID_NAME)));
}
if (path.Substring(0, 1) != PATHDELIMITTER)
{
return(new FuserPathResolveResult(new FSException(Win32Returncode.ERROR_INVALID_NAME)));
}
try {
path = path.Substring(1); // Remove starting \
if (path != "")
{
string[] part = path.Split(PATHDELIMITTER.ToCharArray()[0]);
lastItem = part[part.Length - 1]; // select last item
if (!PathValidateCheckItemname(lastItem, true))
{
throw new Exception("Invalid Path");
}
for (int i = 0; i < (part.Length - 1); i++)
{
p = part[i].Trim();
if (PathValidateCheckItemname(p, false))
{
vItem = null;
lock (currentdirectory) {
vItem = currentdirectory.GetItem(p);
}
if (vItem == null)
{
throw new KeyNotFoundException();
}
if (!(vItem is IFuserFilesystemDirectory))
{
throw new Exception("Invalid path");
}
currentdirectory = (IFuserFilesystemDirectory)vItem;
}
else
{
throw new Exception("Invalid Path");
}
}
}
} catch (FSException fse) {
return(new FuserPathResolveResult(fse));
} catch (Exception e) {
e.ToString();
return(new FuserPathResolveResult(new FSException(Win32Returncode.ERROR_PATH_NOT_FOUND)));
}
ret.currentDirectory = currentdirectory;
ret.itemname = lastItem;
return(ret);
}
