1 files changed, 60 insertions, 0 deletions
diff --git a/lib/libc/locale/t_c32rtomb.c b/lib/libc/locale/t_c32rtomb.c
new file mode 100644
index 000000000000..7233e14f7967
--- /dev/null
+++ b/lib/libc/locale/t_c32rtomb.c
@@ -0,0 +1,60 @@
+/*	$NetBSD: t_c32rtomb.c,v 1.1 2024/08/15 14:16:34 riastradh Exp $	*/
+
+/*-
+ * Copyright (c) 2024 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_c32rtomb.c,v 1.1 2024/08/15 14:16:34 riastradh Exp $");
+
+#include <atf-c.h>
+#include <locale.h>
+#include <uchar.h>
+
+#include "h_macros.h"
+
+ATF_TC(c32rtomb_null);
+ATF_TC_HEAD(c32rtomb_null, tc)
+{
+	atf_tc_set_md_var(tc, "descr", "Test null string output to c32rtomb");
+}
+ATF_TC_BODY(c32rtomb_null, tc)
+{
+	char *locale;
+	mbstate_t ps = {0};
+	size_t n;
+
+	REQUIRE_LIBC((locale = setlocale(LC_ALL, "C")), NULL);
+	ATF_REQUIRE_EQ_MSG(strcmp(locale, "C"), 0, "locale=%s", locale);
+
+	ATF_CHECK_EQ_MSG((n = c32rtomb(NULL, L'x', &ps)), 1, "n=%zu", n);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+	ATF_TP_ADD_TC(tp, c32rtomb_null);
+	return atf_no_error();
+}