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/fs_path_utils.hpp

@@ -0,0 +1,48 @@
+/*
+ * 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 "../fssrv/fssrv_sf_path.hpp"
+
+namespace ams::fs {
+
+    inline void Replace(char *dst, size_t dst_size, char old_char, char new_char) {
+        for (char *cur = dst; cur < dst + dst_size && *cur != '\x00'; cur++) {
+            if (*cur == old_char) {
+                *cur = new_char;
+            }
+        }
+    }
+
+    inline Result FspPathPrintf(fssrv::sf::FspPath *dst, const char *format, ...) {
+        /* Format the path. */
+        std::va_list va_list;
+        va_start(va_list, format);
+        const size_t len = std::vsnprintf(dst->str, sizeof(dst->str), format, va_list);
+        va_end(va_list);
+
+        /* Validate length. */
+        R_UNLESS(len < sizeof(dst->str), fs::ResultTooLongPath());
+
+        /* Fix slashes. */
+        Replace(dst->str, sizeof(dst->str) - 1, '\\', '/');
+
+        return ResultSuccess();
+    }
+
+    Result VerifyPath(const char *path, size_t max_path_len, size_t max_name_len);
+
+}