1/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
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.
8
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.
13
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 <https://www.gnu.org/licenses/>. */
17
18#include <string.h>
19
20#undef strncpy
21
22#ifndef STRNCPY
23 #define STRNCPY strncpy
24#endif
25
26char *
27STRNCPY (char *s1, const char *s2, size_t n)
28{
29 size_t size = __strnlen (s2, n);
30 if (size != n)
31 memset (s1 + size, '\0', n - size);
32 return memcpy (s1, s2, size);
33}
34libc_hidden_builtin_def (strncpy)
35