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
|
/* Implement twalk using twalk_r.
Copyright (C) 2019-2020 Free Software Foundation, Inc.
The GNU C 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 2.1 of the License, or (at your option) any later version.
The GNU C 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 General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#include <search.h>
struct twalk_with_twalk_r_closure
{
void (*action) (const void *, VISIT, int);
int depth;
};
static void
twalk_with_twalk_r_action (const void *nodep, VISIT which, void *closure0)
{
struct twalk_with_twalk_r_closure *closure = closure0;
switch (which)
{
case leaf:
closure->action (nodep, which, closure->depth);
break;
case preorder:
closure->action (nodep, which, closure->depth);
++closure->depth;
break;
case postorder:
/* The preorder action incremented the depth. */
closure->action (nodep, which, closure->depth - 1);
break;
case endorder:
--closure->depth;
closure->action (nodep, which, closure->depth);
break;
}
}
void
twalk (const void *root, void (*action) (const void *, VISIT, int))
{
struct twalk_with_twalk_r_closure closure = { action, 0 };
twalk_r (root, twalk_with_twalk_r_action, &closure);
}
|
