1 files changed, 57 insertions, 0 deletions
diff --git a/lib/libc/locale/mbtowc.c b/lib/libc/locale/mbtowc.c
new file mode 100644
index 0000000..cc88566
--- /dev/null
+++ b/lib/libc/locale/mbtowc.c
@@ -0,0 +1,57 @@
+/*-
+ * Copyright (c) 2002, 2003 Tim J. Robbins.
+ * 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 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 <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+int
+mbtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n)
+{
+	size_t rval;
+
+	if (s == NULL)
+		/* No support for state dependent encodings. */
+		return (0);
+	/*
+	 * We pass NULL as the state pointer to mbrtowc() because we don't
+	 * support state-dependent encodings and don't want to waste time
+	 * creating a zeroed mbstate_t that will not be used.
+	 */
+	rval = mbrtowc(pwc, s, n, NULL);
+	if (rval == (size_t)-1 || rval == (size_t)-2)
+		return (-1);
+	if (rval > INT_MAX) {
+		errno = ERANGE;
+		return (-1);
+	}
+	return ((int)rval);
+}