implement ifilesys:cleandirectoryrecursively

Ryujinx.HLE/OsHle/Services/FspSrv/IFileSystem.cs

@@ -35,7 +35,7 @@ namespace Ryujinx.HLE.OsHle.Services.FspSrv
                 { 10, Commit                     },
                 { 11, GetFreeSpaceSize           },
                 { 12, GetTotalSpaceSize          },
-                //{ 13, CleanDirectoryRecursively  },
+                { 13, CleanDirectoryRecursively  },
                 //{ 14, GetFileTimeStampRaw        }
             };
 
@@ -341,6 +341,39 @@ namespace Ryujinx.HLE.OsHle.Services.FspSrv
             return 0;
         }
 
+        public long CleanDirectoryRecursively(ServiceCtx Context)
+        {
+            long Position = Context.Request.PtrBuff[0].Position;
+
+            string Name = ReadUtf8String(Context);
+
+            string DirName = Context.Ns.VFs.GetFullPath(Path, Name);
+
+            if (!Directory.Exists(DirName))
+            {
+                return MakeError(ErrorModule.Fs, FsErr.PathDoesNotExist);
+            }
+
+            if (IsPathAlreadyInUse(DirName))
+            {
+                return MakeError(ErrorModule.Fs, FsErr.PathAlreadyInUse);
+            }
+
+           foreach(string Entry in Directory.EnumerateFileSystemEntries(DirName))
+            {
+                if(Directory.Exists(Entry))
+                {
+                    Directory.Delete(Entry, true);
+                }
+                else if(File.Exists(Entry))
+                {
+                    File.Delete(Entry);
+                }
+            }
+
+            return 0;
+        }
+
         private bool IsPathAlreadyInUse(string Path)
         {
             lock (OpenPaths)