pmt: initial 3.0.2 update

include/libgnulib/wctomb-impl.h

@@ -0,0 +1,34 @@
+/* Convert wide character to multibyte character.
+   Copyright (C) 2011-2024 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   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/>.  */
+
+int
+wctomb (char *s, wchar_t wc)
+{
+  if (s == NULL)
+    return 0;
+  else
+    {
+      mbstate_t state;
+      size_t result;
+
+      mbszero (&state);
+      result = wcrtomb (s, wc, &state);
+      if (result == (size_t)-1)
+        return -1;
+      return result;
+    }
+}