1/* Copyright (C) 1993-2020 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#ifdef HAVE_CONFIG_H
19# include <config.h>
20#endif
21
22#ifdef _LIBC
23# include <string.h>
24#else
25# include <sys/types.h>
26#endif
27
28#ifndef STPNCPY
29# ifdef weak_alias
30# define STPNCPY __stpncpy
31weak_alias (__stpncpy, stpncpy)
32# else
33# define STPNCPY stpncpy
34# endif
35#endif
36
37/* Copy no more than N characters of SRC to DEST, returning the address of
38 the terminating '\0' in DEST, if any, or else DEST + N. */
39char *
40STPNCPY (char *dest, const char *src, size_t n)
41{
42 size_t size = __strnlen (src, n);
43 memcpy (dest, src, size);
44 dest += size;
45 if (size == n)
46 return dest;
47 return memset (dest, '\0', n - size);
48}
49#ifdef weak_alias
50libc_hidden_def (__stpncpy)
51#endif
52