powerpc: refactor stpcpy, stpncpy, strcpy, and strncpy IFUNC.
[glibc.git] / debug / strncpy_chk.c
blob190153220124b123f35808f75d1dcdb15f04aa11
1 /* Copyright (C) 1991-2017 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #include <string.h>
19 #include <memcopy.h>
22 char *
23 __strncpy_chk (char *s1, const char *s2, size_t n, size_t s1len)
25 if (__builtin_expect (s1len < n, 0))
26 __chk_fail ();
28 return strncpy (s1, s2, n);