git subrepo clone https://github.com/Atmosphere-NX/Atmosphere-libs libraries

subrepo:
  subdir:   "libraries"
  merged:   "07af583b"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "07af583b"
git-subrepo:
  version:  "0.4.0"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "5d6aba9"

libraries/libstratosphere/include/stratosphere/fs/fsa/fs_idirectory.hpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018-2019 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "../fs_common.hpp"
+#include "../fs_directory.hpp"
+
+namespace ams::fs::fsa {
+
+    class IDirectory {
+        public:
+            virtual ~IDirectory() { /* ... */ }
+
+            Result Read(s64 *out_count, DirectoryEntry *out_entries, s64 max_entries) {
+                R_UNLESS(out_count != nullptr, fs::ResultNullptrArgument());
+                if (max_entries == 0) {
+                    *out_count = 0;
+                    return ResultSuccess();
+                }
+                R_UNLESS(out_entries != nullptr, fs::ResultNullptrArgument());
+                R_UNLESS(max_entries > 0, fs::ResultInvalidArgument());
+                return this->ReadImpl(out_count, out_entries, max_entries);
+            }
+
+            Result GetEntryCount(s64 *out) {
+                R_UNLESS(out != nullptr, fs::ResultNullptrArgument());
+                return this->GetEntryCountImpl(out);
+            }
+        public:
+            /* TODO: This is a hack to allow the mitm API to work. Find a better way? */
+            virtual sf::cmif::DomainObjectId GetDomainObjectId() const = 0;
+        protected:
+            /* ...? */
+        private:
+            virtual Result ReadImpl(s64 *out_count, DirectoryEntry *out_entries, s64 max_entries) = 0;
+            virtual Result GetEntryCountImpl(s64 *out) = 0;
+    };
+
+}