1 files changed, 45 insertions, 0 deletions
diff --git a/debug/wcpcpy_chk.c b/debug/wcpcpy_chk.c
new file mode 100644
index 0000000000..c48ec68ccc
--- /dev/null
+++ b/debug/wcpcpy_chk.c
@@ -0,0 +1,45 @@
+/* Copyright (C) 1996, 1997, 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
+
+   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 <wchar.h>
+
+#define __need_ptrdiff_t
+#include <stddef.h>
+
+
+/* Copy SRC to DEST, returning the address of the terminating L'\0' in
+   DEST.  Check for overflows.  */
+wchar_t *
+__wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen)
+{
+  wchar_t *wcp = (wchar_t *) dest - 1;
+  wint_t c;
+  const ptrdiff_t off = src - dest + 1;
+
+  do
+    {
+      if (__builtin_expect (destlen-- == 0, 0))
+	__chk_fail ();
+      c = wcp[off];
+      *++wcp = c;
+    }
+  while (c != L'\0');
+
+  return wcp;
+}