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-rw-r--r--debug/wcpcpy_chk.c45
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diff --git a/debug/wcpcpy_chk.c b/debug/wcpcpy_chk.c
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+/* 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;
+}