+# ifndef FILESYSTEM_PREFIX_LEN
+# define FILESYSTEM_PREFIX_LEN(Filename) 0
+# endif
+
+char *base_name (char const *path);
+char *dir_name (char const *path);
+size_t base_len (char const *path);
+size_t dir_len (char const *path);
+
+int strip_trailing_slashes (char *path);