Import mtools 4.0.26

Bug: 175204891
Bug: 180112530
Change-Id: I8a656b5da155f9857afa4f48c6b40fe72f68c052
diff --git a/file_name.h b/file_name.h
new file mode 100644
index 0000000..cc7039a
--- /dev/null
+++ b/file_name.h
@@ -0,0 +1,49 @@
+#ifndef FILE_NAME_H
+#define FILE_NAME_H
+
+/*  Copyright 2009 Alain Knaff.
+ *  This file is part of mtools.
+ *
+ *  Mtools is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Mtools is distributed in the hope that 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 Mtools.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sysincludes.h>
+#include "mtools.h"
+
+/**
+ * raw dos-name coming straight from the directory entry
+ * MYFILE  TXT
+ */
+struct dos_name_t {
+  char base[8] NONULLTERM;
+  char ext[3] NONULLTERM;
+  char sentinel;
+};
+
+int dos_to_wchar(doscp_t *fromDos, const char *dos, wchar_t *wchar, size_t len);
+void wchar_to_dos(doscp_t *toDos, wchar_t *wchar, char *dos, size_t len, int *mangled);
+
+doscp_t *cp_open(int codepage);
+void cp_close(doscp_t *cp);
+
+int wchar_to_native(const wchar_t *wchar, char *native,
+		    size_t len, size_t out_len);
+
+#define WCHAR_TO_NATIVE(wchar,native,len) \
+	wchar_to_native((wchar),(native),(len),sizeof(native))
+
+int native_to_wchar(const char *native, wchar_t *wchar, size_t len,
+		    const char *end, int *mangled);
+
+#endif