1/* Implement the xstrndup function.
2   Copyright (C) 2005 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 Replacement char* xstrndup (const char *@var{s}, size_t @var{n})
24
25Returns a pointer to a copy of @var{s} with at most @var{n} characters
26without fail, using @code{xmalloc} to obtain memory.  The result is
27always NUL terminated.
28
29@end deftypefn
30
31*/
32
33#ifdef HAVE_CONFIG_H
34#include "config.h"
35#endif
36#include <sys/types.h>
37#ifdef HAVE_STRING_H
38#include <string.h>
39#else
40# ifdef HAVE_STRINGS_H
41#  include <strings.h>
42# endif
43#endif
44#include "ansidecl.h"
45#include "libiberty.h"
46
47char *
48xstrndup (const char *s, size_t n)
49{
50  char *result;
51  size_t len = strlen (s);
52
53  if (n < len)
54    len = n;
55
56  result = XNEWVEC (char, len + 1);
57
58  result[len] = '\0';
59  return (char *) memcpy (result, s, len);
60}
61