1 files changed, 35 insertions, 0 deletions
diff --git a/debug/mbstowcs_chk.c b/debug/mbstowcs_chk.c
new file mode 100644
index 0000000000..d1403c5d2b
--- /dev/null
+++ b/debug/mbstowcs_chk.c
@@ -0,0 +1,35 @@
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <locale.h>
+#include <string.h>
+#include <wchar.h>
+
+
+size_t
+__mbstowcs_chk (wchar_t *dst, const char *src, size_t len, size_t dstlen)
+{
+  if (__builtin_expect (dstlen < len, 0))
+    __chk_fail ();
+
+  mbstate_t state;
+
+  memset (&state, '\0', sizeof state);
+  /* Return how many we wrote (or maybe an error).  */
+  return __mbsrtowcs (dst, &src, len, &state);
+}