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-rw-r--r--lib/iswdigit.c26
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diff --git a/lib/iswdigit.c b/lib/iswdigit.c
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+/* Test wide character for being a digit.
+ Copyright (C) 2020-2022 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/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include <wctype.h>
+
+int
+iswdigit (wint_t wc)
+{
+ return wc >= '0' && wc <= '9';
+}