1/* Implement the stpncpy function.
2   Copyright (C) 2003 Free Software Foundation, Inc.
3   Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
4
5This file is part of the libiberty library.
6Libiberty is free software; you can redistribute it and/or
7modify it under the terms of the GNU Library General Public
8License as published by the Free Software Foundation; either
9version 2 of the License, or (at your option) any later version.
10
11Libiberty is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14Library General Public License for more details.
15
16You should have received a copy of the GNU Library General Public
17License along with libiberty; see the file COPYING.LIB.  If
18not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
19Boston, MA 02110-1301, USA.  */
20
21/*
22
23@deftypefn Supplemental char* stpncpy (char *@var{dst}, const char *@var{src}, size_t @var{len})
24
25Copies the string @var{src} into @var{dst}, copying exactly @var{len}
26and padding with zeros if necessary.  If @var{len} < strlen(@var{src})
27then return @var{dst} + @var{len}, otherwise returns @var{dst} +
28strlen(@var{src}).
29
30@end deftypefn
31
32*/
33
34#include <ansidecl.h>
35#include <stddef.h>
36
37extern size_t strlen (const char *);
38extern char *strncpy (char *, const char *, size_t);
39
40char *
41stpncpy (char *dst, const char *src, size_t len)
42{
43  size_t n = strlen (src);
44  if (n > len)
45    n = len;
46  return strncpy (dst, src, len) + n;
47}
48