1 /* Copyright (C) 1996, 1997, 1998, 2001, 2002, 2003, 2005, 2006 Free
2 Software Foundation, Inc.
3
4 NOTE: The canonical source of this file is maintained with the GNU C Library.
5 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
6
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
10 later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software Foundation,
19 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #ifdef HAVE_CONFIG_H
22 # include <config.h>
23 #endif
24 #if !_LIBC
25 # include "strndup.h"
26 #endif
27
28 #include <stdlib.h>
29 #include <string.h>
30
31 #if !_LIBC
32 # include "strnlen.h"
33 # ifndef __strnlen
34 # define __strnlen strnlen
35 # endif
36 #endif
37
38 #undef __strndup
39 #if _LIBC
40 # undef strndup
41 #endif
42
43 #ifndef weak_alias
44 # define __strndup strndup
45 #endif
46
47 char *
__strndup(s,n)48 __strndup (s, n)
49 const char *s;
50 size_t n;
51 {
52 size_t len = __strnlen (s, n);
53 char *new = malloc (len + 1);
54
55 if (new == NULL)
56 return NULL;
57
58 new[len] = '\0';
59 return memcpy (new, s, len);
60 }
61 #ifdef libc_hidden_def
62 libc_hidden_def (__strndup)
63 #endif
64 #ifdef weak_alias
65 weak_alias (__strndup, strndup)
66 #endif
67