1 /*
2  * This program is free software; you can redistribute it and/or
3  * modify it under the terms of the GNU General Public License
4  * as published by the Free Software Foundation; either version 2
5  * of the License, or (at your option) any later version.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * along with this program; if not, write to the Free Software Foundation,
14  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15  *
16  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
17  * All rights reserved.
18  */
19 
20 /** \file
21  * \ingroup DNA
22  * \brief These structs are the foundation for all linked lists in the library system.
23  *
24  * Doubly-linked lists start from a ListBase and contain elements beginning
25  * with Link.
26  */
27 
28 #pragma once
29 
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33 
34 /** Generic - all structs which are put into linked lists begin with this. */
35 typedef struct Link {
36   struct Link *next, *prev;
37 } Link;
38 
39 /** Simple subclass of Link. Use this when it is not worth defining a custom one. */
40 typedef struct LinkData {
41   struct LinkData *next, *prev;
42   void *data;
43 } LinkData;
44 
45 /** Never change the size of this! dna_genfile.c detects pointer_size with it. */
46 typedef struct ListBase {
47   void *first, *last;
48 } ListBase;
49 
50 /* 8 byte alignment! */
51 
52 #ifdef __cplusplus
53 }
54 #endif
55