Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * (c) 2009 Arnaldo Carvalho de Melo <acme@redhat.com>
3 *
4 * Licensed under the GPLv2.
5 */
6
7#include "strlist.h"
8#include "util.h"
9#include <errno.h>
10#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include <unistd.h>
14
15static
16struct rb_node *strlist__node_new(struct rblist *rblist, const void *entry)
17{
18 const char *s = entry;
19 struct rb_node *rc = NULL;
20 struct strlist *strlist = container_of(rblist, struct strlist, rblist);
21 struct str_node *snode = malloc(sizeof(*snode));
22
23 if (snode != NULL) {
24 if (strlist->dupstr) {
25 s = strdup(s);
26 if (s == NULL)
27 goto out_delete;
28 }
29 snode->s = s;
30 rc = &snode->rb_node;
31 }
32
33 return rc;
34
35out_delete:
36 free(snode);
37 return NULL;
38}
39
40static void str_node__delete(struct str_node *snode, bool dupstr)
41{
42 if (dupstr)
43 zfree((char **)&snode->s);
44 free(snode);
45}
46
47static
48void strlist__node_delete(struct rblist *rblist, struct rb_node *rb_node)
49{
50 struct strlist *slist = container_of(rblist, struct strlist, rblist);
51 struct str_node *snode = container_of(rb_node, struct str_node, rb_node);
52
53 str_node__delete(snode, slist->dupstr);
54}
55
56static int strlist__node_cmp(struct rb_node *rb_node, const void *entry)
57{
58 const char *str = entry;
59 struct str_node *snode = container_of(rb_node, struct str_node, rb_node);
60
61 return strcmp(snode->s, str);
62}
63
64int strlist__add(struct strlist *slist, const char *new_entry)
65{
66 return rblist__add_node(&slist->rblist, new_entry);
67}
68
69int strlist__load(struct strlist *slist, const char *filename)
70{
71 char entry[1024];
72 int err;
73 FILE *fp = fopen(filename, "r");
74
75 if (fp == NULL)
76 return -errno;
77
78 while (fgets(entry, sizeof(entry), fp) != NULL) {
79 const size_t len = strlen(entry);
80
81 if (len == 0)
82 continue;
83 entry[len - 1] = '\0';
84
85 err = strlist__add(slist, entry);
86 if (err != 0)
87 goto out;
88 }
89
90 err = 0;
91out:
92 fclose(fp);
93 return err;
94}
95
96void strlist__remove(struct strlist *slist, struct str_node *snode)
97{
98 rblist__remove_node(&slist->rblist, &snode->rb_node);
99}
100
101struct str_node *strlist__find(struct strlist *slist, const char *entry)
102{
103 struct str_node *snode = NULL;
104 struct rb_node *rb_node = rblist__find(&slist->rblist, entry);
105
106 if (rb_node)
107 snode = container_of(rb_node, struct str_node, rb_node);
108
109 return snode;
110}
111
112static int strlist__parse_list_entry(struct strlist *slist, const char *s,
113 const char *subst_dir)
114{
115 int err;
116 char *subst = NULL;
117
118 if (strncmp(s, "file://", 7) == 0)
119 return strlist__load(slist, s + 7);
120
121 if (subst_dir) {
122 err = -ENOMEM;
123 if (asprintf(&subst, "%s/%s", subst_dir, s) < 0)
124 goto out;
125
126 if (access(subst, F_OK) == 0) {
127 err = strlist__load(slist, subst);
128 goto out;
129 }
130
131 if (slist->file_only) {
132 err = -ENOENT;
133 goto out;
134 }
135 }
136
137 err = strlist__add(slist, s);
138out:
139 free(subst);
140 return err;
141}
142
143static int strlist__parse_list(struct strlist *slist, const char *s, const char *subst_dir)
144{
145 char *sep;
146 int err;
147
148 while ((sep = strchr(s, ',')) != NULL) {
149 *sep = '\0';
150 err = strlist__parse_list_entry(slist, s, subst_dir);
151 *sep = ',';
152 if (err != 0)
153 return err;
154 s = sep + 1;
155 }
156
157 return *s ? strlist__parse_list_entry(slist, s, subst_dir) : 0;
158}
159
160struct strlist *strlist__new(const char *list, const struct strlist_config *config)
161{
162 struct strlist *slist = malloc(sizeof(*slist));
163
164 if (slist != NULL) {
165 bool dupstr = true;
166 bool file_only = false;
167 const char *dirname = NULL;
168
169 if (config) {
170 dupstr = !config->dont_dupstr;
171 dirname = config->dirname;
172 file_only = config->file_only;
173 }
174
175 rblist__init(&slist->rblist);
176 slist->rblist.node_cmp = strlist__node_cmp;
177 slist->rblist.node_new = strlist__node_new;
178 slist->rblist.node_delete = strlist__node_delete;
179
180 slist->dupstr = dupstr;
181 slist->file_only = file_only;
182
183 if (list && strlist__parse_list(slist, list, dirname) != 0)
184 goto out_error;
185 }
186
187 return slist;
188out_error:
189 free(slist);
190 return NULL;
191}
192
193void strlist__delete(struct strlist *slist)
194{
195 if (slist != NULL)
196 rblist__delete(&slist->rblist);
197}
198
199struct str_node *strlist__entry(const struct strlist *slist, unsigned int idx)
200{
201 struct str_node *snode = NULL;
202 struct rb_node *rb_node;
203
204 rb_node = rblist__entry(&slist->rblist, idx);
205 if (rb_node)
206 snode = container_of(rb_node, struct str_node, rb_node);
207
208 return snode;
209}