pmt: initial 3.0.2 update

include/libgnulib/lc-charset-unicode.h

@@ -0,0 +1,33 @@
+/* Conversion between the current locale's character encoding and Unicode.
+   Copyright (C) 2023-2024 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2023.  */
+
+/* This facility is only needed on specific platforms.  */
+#if GL_CHAR32_T_IS_UNICODE && GL_CHAR32_T_VS_WCHAR_T_NEEDS_CONVERSION
+
+# include <wchar.h>
+# include <uchar.h>
+
+/* Returns WC (must be != 0) as a Unicode character,
+   or 0 in case it cannot be converted.  */
+extern char32_t locale_encoding_to_unicode (wchar_t wc);
+
+/* Returns UC (must be != 0) as a wide character,
+   or 0 in case it cannot be converted.  */
+extern wchar_t unicode_to_locale_encoding (char32_t uc);
+
+#endif