1169695Skan/* Implement the strndup function.
2169695Skan   Copyright (C) 2005 Free Software Foundation, Inc.
3169695Skan   Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
4169695Skan
5169695SkanThis file is part of the libiberty library.
6169695SkanLibiberty is free software; you can redistribute it and/or
7169695Skanmodify it under the terms of the GNU Library General Public
8169695SkanLicense as published by the Free Software Foundation; either
9169695Skanversion 2 of the License, or (at your option) any later version.
10169695Skan
11169695SkanLibiberty is distributed in the hope that it will be useful,
12169695Skanbut WITHOUT ANY WARRANTY; without even the implied warranty of
13169695SkanMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14169695SkanLibrary General Public License for more details.
15169695Skan
16169695SkanYou should have received a copy of the GNU Library General Public
17169695SkanLicense along with libiberty; see the file COPYING.LIB.  If
18169695Skannot, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
19169695SkanBoston, MA 02110-1301, USA.  */
20169695Skan
21169695Skan/*
22169695Skan
23169695Skan@deftypefn Extension char* strndup (const char *@var{s}, size_t @var{n})
24169695Skan
25169695SkanReturns a pointer to a copy of @var{s} with at most @var{n} characters
26169695Skanin memory obtained from @code{malloc}, or @code{NULL} if insufficient
27169695Skanmemory was available.  The result is always NUL terminated.
28169695Skan
29169695Skan@end deftypefn
30169695Skan
31169695Skan*/
32169695Skan
33169695Skan#include "ansidecl.h"
34169695Skan#include <stddef.h>
35169695Skan
36169695Skanextern size_t	strlen (const char*);
37169695Skanextern PTR	malloc (size_t);
38169695Skanextern PTR	memcpy (PTR, const PTR, size_t);
39169695Skan
40169695Skanchar *
41169695Skanstrndup (const char *s, size_t n)
42169695Skan{
43169695Skan  char *result;
44169695Skan  size_t len = strlen (s);
45169695Skan
46169695Skan  if (n < len)
47169695Skan    len = n;
48169695Skan
49169695Skan  result = (char *) malloc (len + 1);
50169695Skan  if (!result)
51169695Skan    return 0;
52169695Skan
53169695Skan  result[len] = '\0';
54169695Skan  return (char *) memcpy (result, s, len);
55169695Skan}
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