-/* Copyright (C) 1992-2014 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2019 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
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/>. */
+ <https://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
char *
-__stpcpy_chk (dest, src, destlen)
- char *dest;
- const char *src;
- size_t destlen;
+__stpcpy_chk (char *dest, const char *src, size_t destlen)
{
- char *d = dest;
- const char *s = src;
-
- do
- {
- if (__builtin_expect (destlen-- == 0, 0))
- __chk_fail ();
- *d++ = *s;
- }
- while (*s++ != '\0');
-
- return d - 1;
+ size_t len = strlen (src);
+ if (len >= destlen)
+ __chk_fail ();
+
+ return memcpy (dest, src, len + 1) + len;
}