2 * libuci - Library for the Unified Configuration Interface
3 * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
5 * this program is free software; you can redistribute it and/or modify
6 * it under the terms of the gnu lesser general public license version 2.1
7 * as published by the free software foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
17 /* initialize a list head/item */
18 static inline void uci_list_init(struct uci_list *ptr)
24 /* inserts a new list entry between two consecutive entries */
25 static inline void uci_list_insert(struct uci_list *list, struct uci_list *ptr)
27 list->next->prev = ptr;
29 ptr->next = list->next;
33 /* inserts a new list entry at the tail of the list */
34 static inline void uci_list_add(struct uci_list *head, struct uci_list *ptr)
36 /* NB: head->prev points at the tail */
37 uci_list_insert(head->prev, ptr);
40 static inline void uci_list_del(struct uci_list *ptr)
42 struct uci_list *next, *prev;
53 static struct uci_element *
54 uci_alloc_generic(struct uci_context *ctx, int type, const char *name, int size)
56 struct uci_element *e;
59 ptr = uci_malloc(ctx, size + strlen(name) + 1);
60 e = (struct uci_element *) ptr;
62 e->name = (char *) ptr + size;
63 strcpy(e->name, name);
64 uci_list_init(&e->list);
70 uci_free_element(struct uci_element *e)
72 if (!uci_list_empty(&e->list))
73 uci_list_del(&e->list);
77 static struct uci_option *
78 uci_alloc_option(struct uci_section *s, const char *name, const char *value)
80 struct uci_package *p = s->package;
81 struct uci_context *ctx = p->ctx;
84 o = uci_alloc_element(ctx, option, name, strlen(value) + 1);
85 o->value = uci_dataptr(o);
87 strcpy(o->value, value);
88 uci_list_add(&s->options, &o->e.list);
94 uci_free_option(struct uci_option *o)
96 uci_free_element(&o->e);
99 static struct uci_section *
100 uci_alloc_section(struct uci_package *p, const char *type, const char *name)
102 struct uci_context *ctx = p->ctx;
103 struct uci_section *s;
106 if (!name || !name[0]) {
107 snprintf(buf, 16, "cfg%d", p->n_section);
111 s = uci_alloc_element(ctx, section, name, strlen(type) + 1);
112 s->type = uci_dataptr(s);
114 strcpy(s->type, type);
115 uci_list_init(&s->options);
116 uci_list_add(&p->sections, &s->e.list);
122 uci_free_section(struct uci_section *s)
124 struct uci_element *o, *tmp;
126 uci_foreach_element_safe(&s->options, tmp, o) {
127 uci_free_option(uci_to_option(o));
129 uci_free_element(&s->e);
132 static struct uci_package *
133 uci_alloc_package(struct uci_context *ctx, const char *name)
135 struct uci_package *p;
137 p = uci_alloc_element(ctx, package, name, 0);
139 uci_list_init(&p->sections);
144 uci_free_package(struct uci_package *p)
146 struct uci_element *e, *tmp;
151 uci_foreach_element_safe(&p->sections, tmp, e) {
152 uci_free_section(uci_to_section(e));
154 uci_free_element(&p->e);
157 static struct uci_element *uci_lookup_list(struct uci_context *ctx, struct uci_list *list, char *name)
159 struct uci_element *e;
161 uci_foreach_element(list, e) {
162 if (!strcmp(e->name, name))
165 UCI_THROW(ctx, UCI_ERR_NOTFOUND);
168 int uci_lookup(struct uci_context *ctx, struct uci_element **res, char *package, char *section, char *option)
170 struct uci_element *e;
171 struct uci_package *p;
172 struct uci_section *s;
173 struct uci_option *o;
176 UCI_ASSERT(ctx, res != NULL);
177 UCI_ASSERT(ctx, package != NULL);
179 e = uci_lookup_list(ctx, &ctx->root, package);
183 p = uci_to_package(e);
184 e = uci_lookup_list(ctx, &p->sections, section);
188 s = uci_to_section(e);
189 e = uci_lookup_list(ctx, &s->options, option);
196 int uci_unload(struct uci_context *ctx, const char *name)
198 struct uci_element *e;
201 UCI_ASSERT(ctx, name != NULL);
203 uci_foreach_element(&ctx->root, e) {
204 if (!strcmp(e->name, name))
207 UCI_THROW(ctx, UCI_ERR_NOTFOUND);
210 uci_free_package(uci_to_package(e));