1 files changed, 103 insertions, 0 deletions
diff --git a/lib/libc/locale/wctrans.c b/lib/libc/locale/wctrans.c
new file mode 100644
index 0000000000000..36cb25e455491
--- /dev/null
+++ b/lib/libc/locale/wctrans.c
@@ -0,0 +1,103 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2002 Tim J. Robbins.
+ * All rights reserved.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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 AUTHOR 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 AUTHOR 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>
+__FBSDID("$FreeBSD$");
+
+#include <errno.h>
+#include <string.h>
+#include <wctype.h>
+#include "xlocale_private.h"
+
+enum {
+	_WCT_ERROR	= 0,
+	_WCT_TOLOWER	= 1,
+	_WCT_TOUPPER	= 2
+};
+
+wint_t
+towctrans_l(wint_t wc, wctrans_t desc, locale_t locale)
+{
+	switch (desc) {
+	case _WCT_TOLOWER:
+		wc = towlower_l(wc, locale);
+		break;
+	case _WCT_TOUPPER:
+		wc = towupper_l(wc, locale);
+		break;
+	case _WCT_ERROR:
+	default:
+		errno = EINVAL;
+		break;
+	}
+
+	return (wc);
+}
+wint_t
+towctrans(wint_t wc, wctrans_t desc)
+{
+	return towctrans_l(wc, desc, __get_locale());
+}
+
+/*
+ * wctrans() calls this will a 0 locale.  If this is ever modified to actually
+ * use the locale, wctrans() must be modified to call __get_locale().
+ */
+wctrans_t
+wctrans_l(const char *charclass, locale_t locale)
+{
+	struct {
+		const char	*name;
+		wctrans_t	 trans;
+	} ccls[] = {
+		{ "tolower",	_WCT_TOLOWER },
+		{ "toupper",	_WCT_TOUPPER },
+		{ NULL,		_WCT_ERROR },		/* Default */
+	};
+	int i;
+
+	i = 0;
+	while (ccls[i].name != NULL && strcmp(ccls[i].name, charclass) != 0)
+		i++;
+
+	if (ccls[i].trans == _WCT_ERROR)
+		errno = EINVAL;
+	return (ccls[i].trans);
+}
+
+wctrans_t
+wctrans(const char *charclass)
+{
+	return wctrans_l(charclass, 0);
+}
+