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/fssrv/fssrv_path_normalizer.hpp

@@ -0,0 +1,66 @@
+/*
+ * 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/fs_common.hpp"
+
+namespace ams::fssrv {
+
+    /* This is in fssrv::detail in official code. */
+    /* TODO: Consider moving to ::impl? */
+
+    class PathNormalizer {
+        public:
+            enum Option : u32 {
+                Option_None                  = BIT(0),
+                Option_PreserveUnc           = BIT(1),
+                Option_PreserveTailSeparator = BIT(2),
+                Option_HasMountName          = BIT(3),
+                Option_AcceptEmpty           = BIT(4),
+            };
+        private:
+            using Buffer = std::unique_ptr<char[]>;
+        private:
+            Buffer buffer;
+            const char *path;
+            Result result;
+        private:
+            static Result Normalize(const char **out_path, Buffer *out_buf, const char *path, bool preserve_unc, bool preserve_tail_sep, bool has_mount_name);
+        public:
+            explicit PathNormalizer(const char *p) : buffer(), path(nullptr), result(ResultSuccess()) {
+                this->result = Normalize(&this->path, &this->buffer, p, false, false, false);
+            }
+
+            PathNormalizer(const char *p, u32 option) : buffer(), path(nullptr), result(ResultSuccess()) {
+                if ((option & Option_AcceptEmpty) && p[0] == '\x00') {
+                    this->path = path;
+                } else {
+                    const bool preserve_unc      = (option & Option_PreserveUnc);
+                    const bool preserve_tail_sep = (option & Option_PreserveTailSeparator);
+                    const bool has_mount_name    = (option & Option_HasMountName);
+                    this->result = Normalize(&this->path, &this->buffer, p, preserve_unc, preserve_tail_sep, has_mount_name);
+                }
+            }
+
+            inline Result GetResult() const {
+                return this->result;
+            }
+
+            inline const char * GetPath() const {
+                return this->path;
+            }
+    };
+
+}