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-rw-r--r--tests/wctomb-impl.h34
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diff --git a/tests/wctomb-impl.h b/tests/wctomb-impl.h
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+/* Convert wide character to multibyte character.
+ Copyright (C) 2011-2015 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+ This program 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.
+
+ This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
+
+int
+wctomb (char *s, wchar_t wc)
+{
+ if (s == NULL)
+ return 0;
+ else
+ {
+ mbstate_t state;
+ size_t result;
+
+ memset (&state, 0, sizeof (mbstate_t));
+ result = wcrtomb (s, wc, &state);
+ if (result == (size_t)-1)
+ return -1;
+ return result;
+ }
+}