[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/wcsmbs/wcsnlen.c b/ap/libc/glibc/glibc-2.23/wcsmbs/wcsnlen.c
new file mode 100644
index 0000000..59527b1
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/wcsmbs/wcsnlen.c
@@ -0,0 +1,50 @@
+/* Copyright (C) 1998-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+ The GNU C Library 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.
+
+ The GNU C Library 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 the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <wchar.h>
+
+#ifdef WCSNLEN
+# define __wcsnlen WCSNLEN
+#endif
+
+/* Return length of string S at most maxlen. */
+size_t
+__wcsnlen (const wchar_t *s, size_t maxlen)
+{
+ size_t len = 0;
+
+ while (maxlen > 0 && s[len] != L'\0')
+ {
+ ++len;
+ if (--maxlen == 0 || s[len] == L'\0')
+ return len;
+ ++len;
+ if (--maxlen == 0 || s[len] == L'\0')
+ return len;
+ ++len;
+ if (--maxlen == 0 || s[len] == L'\0')
+ return len;
+ ++len;
+ --maxlen;
+ }
+
+ return len;
+}
+#ifndef WCSNLEN
+weak_alias (__wcsnlen, wcsnlen)
+#endif