1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2011-2012 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <mailutils/sockaddr.h>
static void
set_next (struct mu_sockaddr *sp, struct mu_sockaddr *tgt)
{
for (; sp->next; sp = sp->next)
;
sp->next = tgt;
if (tgt)
tgt->prev = sp;
}
struct mu_sockaddr *
mu_sockaddr_insert (struct mu_sockaddr *anchor, struct mu_sockaddr *addr,
int before)
{
struct mu_sockaddr *ret = anchor;
if (!anchor)
{
addr->prev = NULL;
set_next (addr, NULL);
return addr;
}
if (before)
{
if (anchor->prev)
anchor = anchor->prev;
else
{
addr->prev = NULL;
set_next (addr, anchor);
return addr;
}
}
set_next (addr, anchor->next);
anchor->next = addr;
addr->prev = anchor;
return ret;
}
|
