Commit | Line | Data |
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5efdfe75 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
70b40c4a DA |
2 | /* |
3 | * Based on intlist.c by: | |
4 | * (c) 2009 Arnaldo Carvalho de Melo <acme@redhat.com> | |
70b40c4a DA |
5 | */ |
6 | ||
7 | #include <errno.h> | |
8 | #include <stdlib.h> | |
9 | #include <linux/compiler.h> | |
10 | ||
11 | #include "intlist.h" | |
12 | ||
1d037ca1 | 13 | static struct rb_node *intlist__node_new(struct rblist *rblist __maybe_unused, |
70b40c4a DA |
14 | const void *entry) |
15 | { | |
94253393 | 16 | unsigned long i = (unsigned long)entry; |
70b40c4a DA |
17 | struct rb_node *rc = NULL; |
18 | struct int_node *node = malloc(sizeof(*node)); | |
19 | ||
20 | if (node != NULL) { | |
21 | node->i = i; | |
2969b129 | 22 | node->priv = NULL; |
70b40c4a DA |
23 | rc = &node->rb_node; |
24 | } | |
25 | ||
26 | return rc; | |
27 | } | |
28 | ||
29 | static void int_node__delete(struct int_node *ilist) | |
30 | { | |
31 | free(ilist); | |
32 | } | |
33 | ||
1d037ca1 | 34 | static void intlist__node_delete(struct rblist *rblist __maybe_unused, |
70b40c4a DA |
35 | struct rb_node *rb_node) |
36 | { | |
37 | struct int_node *node = container_of(rb_node, struct int_node, rb_node); | |
38 | ||
39 | int_node__delete(node); | |
40 | } | |
41 | ||
42 | static int intlist__node_cmp(struct rb_node *rb_node, const void *entry) | |
43 | { | |
94253393 | 44 | unsigned long i = (unsigned long)entry; |
70b40c4a DA |
45 | struct int_node *node = container_of(rb_node, struct int_node, rb_node); |
46 | ||
94253393 JY |
47 | if (node->i > i) |
48 | return 1; | |
49 | else if (node->i < i) | |
50 | return -1; | |
51 | ||
52 | return 0; | |
70b40c4a DA |
53 | } |
54 | ||
94253393 | 55 | int intlist__add(struct intlist *ilist, unsigned long i) |
70b40c4a | 56 | { |
94253393 | 57 | return rblist__add_node(&ilist->rblist, (void *)i); |
70b40c4a DA |
58 | } |
59 | ||
60ebf328 | 60 | void intlist__remove(struct intlist *ilist, struct int_node *node) |
70b40c4a | 61 | { |
60ebf328 | 62 | rblist__remove_node(&ilist->rblist, &node->rb_node); |
70b40c4a DA |
63 | } |
64 | ||
813335b8 | 65 | static struct int_node *__intlist__findnew(struct intlist *ilist, |
94253393 | 66 | unsigned long i, bool create) |
70b40c4a | 67 | { |
813335b8 | 68 | struct int_node *node = NULL; |
5a3d04d6 ACM |
69 | struct rb_node *rb_node; |
70 | ||
71 | if (ilist == NULL) | |
72 | return NULL; | |
70b40c4a | 73 | |
813335b8 | 74 | if (create) |
94253393 | 75 | rb_node = rblist__findnew(&ilist->rblist, (void *)i); |
813335b8 | 76 | else |
94253393 | 77 | rb_node = rblist__find(&ilist->rblist, (void *)i); |
813335b8 | 78 | |
70b40c4a DA |
79 | if (rb_node) |
80 | node = container_of(rb_node, struct int_node, rb_node); | |
81 | ||
82 | return node; | |
83 | } | |
84 | ||
94253393 | 85 | struct int_node *intlist__find(struct intlist *ilist, unsigned long i) |
813335b8 DA |
86 | { |
87 | return __intlist__findnew(ilist, i, false); | |
88 | } | |
89 | ||
94253393 | 90 | struct int_node *intlist__findnew(struct intlist *ilist, unsigned long i) |
813335b8 DA |
91 | { |
92 | return __intlist__findnew(ilist, i, true); | |
93 | } | |
94 | ||
ffe0fb76 ACM |
95 | static int intlist__parse_list(struct intlist *ilist, const char *s) |
96 | { | |
97 | char *sep; | |
98 | int err; | |
99 | ||
100 | do { | |
94253393 | 101 | unsigned long value = strtol(s, &sep, 10); |
ffe0fb76 ACM |
102 | err = -EINVAL; |
103 | if (*sep != ',' && *sep != '\0') | |
104 | break; | |
105 | err = intlist__add(ilist, value); | |
106 | if (err) | |
107 | break; | |
108 | s = sep + 1; | |
109 | } while (*sep != '\0'); | |
110 | ||
111 | return err; | |
112 | } | |
113 | ||
114 | struct intlist *intlist__new(const char *slist) | |
70b40c4a DA |
115 | { |
116 | struct intlist *ilist = malloc(sizeof(*ilist)); | |
117 | ||
118 | if (ilist != NULL) { | |
119 | rblist__init(&ilist->rblist); | |
120 | ilist->rblist.node_cmp = intlist__node_cmp; | |
121 | ilist->rblist.node_new = intlist__node_new; | |
122 | ilist->rblist.node_delete = intlist__node_delete; | |
ffe0fb76 ACM |
123 | |
124 | if (slist && intlist__parse_list(ilist, slist)) | |
125 | goto out_delete; | |
70b40c4a DA |
126 | } |
127 | ||
128 | return ilist; | |
ffe0fb76 ACM |
129 | out_delete: |
130 | intlist__delete(ilist); | |
131 | return NULL; | |
70b40c4a DA |
132 | } |
133 | ||
134 | void intlist__delete(struct intlist *ilist) | |
135 | { | |
136 | if (ilist != NULL) | |
137 | rblist__delete(&ilist->rblist); | |
138 | } | |
139 | ||
140 | struct int_node *intlist__entry(const struct intlist *ilist, unsigned int idx) | |
141 | { | |
142 | struct int_node *node = NULL; | |
143 | struct rb_node *rb_node; | |
144 | ||
145 | rb_node = rblist__entry(&ilist->rblist, idx); | |
146 | if (rb_node) | |
147 | node = container_of(rb_node, struct int_node, rb_node); | |
148 | ||
149 | return node; | |
150 | } |