dpkg (1.18.25) stretch; urgency=medium
[dpkg] / lib / dpkg / pkg-list.c
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1479465f
GJ
1/*
2 * libdpkg - Debian packaging suite library routines
3 * pkg-list.c - primitives for pkg linked list handling
4 *
5 * Copyright © 2009 Guillem Jover <guillem@debian.org>
6 *
7 * This is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This 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, see <https://www.gnu.org/licenses/>.
19 */
20
21#include <config.h>
22#include <compat.h>
23
24#include <stdlib.h>
25
26#include <dpkg/dpkg.h>
27#include <dpkg/dpkg-db.h>
28#include <dpkg/pkg-list.h>
29
30/**
31 * Create a new package list node.
32 *
33 * @param pkg The pkginfo to assign to the node.
34 * @param next The next package list node.
35 *
36 * @return The new package list node.
37 */
38struct pkg_list *
39pkg_list_new(struct pkginfo *pkg, struct pkg_list *next)
40{
41 struct pkg_list *node;
42
43 node = m_malloc(sizeof(*node));
44 node->pkg = pkg;
45 node->next = next;
46
47 return node;
48}
49
50/**
51 * Free all nodes of a package list.
52 *
53 * @param head The head of the list to free.
54 */
55void
56pkg_list_free(struct pkg_list *head)
57{
58 while (head) {
59 struct pkg_list *node;
60
61 node = head;
62 head = head->next;
63
64 free(node);
65 }
66}
67
68/**
69 * Prepend a package list node to a package list.
70 *
71 * @param head The head of the list to prepend to.
72 * @param pkg The pkginfo to prepend to the list.
73 */
74void
75pkg_list_prepend(struct pkg_list **head, struct pkginfo *pkg)
76{
77 *head = pkg_list_new(pkg, *head);
78}