1 files changed, 90 insertions, 0 deletions
diff --git a/lib/libc/locale/wcsrtombs.c b/lib/libc/locale/wcsrtombs.c
new file mode 100644
index 0000000..ccda84e
--- /dev/null
+++ b/lib/libc/locale/wcsrtombs.c
@@ -0,0 +1,90 @@
+/*-
+ * Copyright (c) 2002 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>
+
+size_t
+wcsrtombs(char *__restrict dst, const wchar_t **__restrict src, size_t len,
+    mbstate_t *__restrict ps __unused)
+{
+	char buf[MB_LEN_MAX];
+	const wchar_t *s;
+	size_t nbytes;
+	int nb;
+
+	s = *src;
+	nbytes = 0;
+
+	if (dst == NULL) {
+		for (;;) {
+			if ((nb = (int)wcrtomb(buf, *s, NULL)) < 0)
+				/* Invalid character - wcrtomb() sets errno. */
+				return ((size_t)-1);
+			else if (*s == L'\0')
+				return (nbytes + nb - 1);
+			s++;
+			nbytes += nb;
+		}
+		/*NOTREACHED*/
+	}
+
+	while (len > 0) {
+		if (len > (size_t)MB_CUR_MAX) {
+			/* Enough space to translate in-place. */
+			if ((nb = (int)wcrtomb(dst, *s, NULL)) < 0) {
+				*src = s;
+				return ((size_t)-1);
+			}
+		} else {
+			/* May not be enough space; use temp. buffer. */
+			if ((nb = (int)wcrtomb(buf, *s, NULL)) < 0) {
+				*src = s;
+				return ((size_t)-1);
+			}
+			if (nb > (int)len)
+				/* MB sequence for character won't fit. */
+				break;
+			memcpy(dst, buf, nb);
+		}
+		if (*s == L'\0') {
+			*src = NULL;
+			return (nbytes + nb - 1);
+		}
+		s++;
+		dst += nb;
+		len -= nb;
+		nbytes += nb;
+	}
+	*src = s;
+	return (nbytes);
+}