* GNU General Public License for more details.
*/
+#include <glob.h>
+
+/* initialize a list head/item */
+static inline void uci_list_init(struct uci_list *ptr)
+{
+ ptr->prev = ptr;
+ ptr->next = ptr;
+}
+
+/* inserts a new list entry between two consecutive entries */
+static inline void uci_list_insert(struct uci_list *list, struct uci_list *ptr)
+{
+ list->next->prev = ptr;
+ ptr->prev = list;
+ ptr->next = list->next;
+ list->next = ptr;
+}
+
+/* inserts a new list entry at the tail of the list */
+static inline void uci_list_add(struct uci_list *head, struct uci_list *ptr)
+{
+ /* NB: head->prev points at the tail */
+ uci_list_insert(head->prev, ptr);
+}
+
+static inline void uci_list_del(struct uci_list *ptr)
+{
+ struct uci_list *next, *prev;
+
+ next = ptr->next;
+ prev = ptr->prev;
+
+ prev->next = next;
+ next->prev = prev;
+
+ uci_list_init(ptr);
+}
+
+static struct uci_element *
+uci_alloc_generic(struct uci_context *ctx, int type, const char *name, int size)
+{
+ struct uci_element *e;
+ void *ptr;
+
+ ptr = uci_malloc(ctx, size + strlen(name) + 1);
+ e = (struct uci_element *) ptr;
+ e->type = type;
+ e->name = (char *) ptr + size;
+ strcpy(e->name, name);
+ uci_list_init(&e->list);
+
+ return e;
+}
+
+static void
+uci_free_element(struct uci_element *e)
+{
+ if (!uci_list_empty(&e->list))
+ uci_list_del(&e->list);
+ free(e);
+}
+
+static struct uci_option *
+uci_alloc_option(struct uci_section *s, const char *name, const char *value)
+{
+ struct uci_package *p = s->package;
+ struct uci_context *ctx = p->ctx;
+ struct uci_option *o;
+
+ o = uci_alloc_element(ctx, option, name, strlen(value) + 1);
+ o->value = uci_dataptr(o);
+ o->section = s;
+ strcpy(o->value, value);
+ uci_list_add(&s->options, &o->e.list);
+
+ return o;
+}
+
+static inline void
+uci_free_option(struct uci_option *o)
+{
+ uci_free_element(&o->e);
+}
+
+static struct uci_section *
+uci_alloc_section(struct uci_package *p, const char *type, const char *name)
+{
+ struct uci_context *ctx = p->ctx;
+ struct uci_section *s;
+ char buf[16];
+
+ if (!name || !name[0]) {
+ snprintf(buf, 16, "cfg%d", p->n_section);
+ name = buf;
+ }
+
+ s = uci_alloc_element(ctx, section, name, strlen(type) + 1);
+ s->type = uci_dataptr(s);
+ s->package = p;
+ strcpy(s->type, type);
+ uci_list_init(&s->options);
+ uci_list_add(&p->sections, &s->e.list);
+
+ return s;
+}
+
+static void
+uci_free_section(struct uci_section *s)
+{
+ struct uci_element *o, *tmp;
+
+ uci_foreach_element_safe(&s->options, tmp, o) {
+ uci_free_option(uci_to_option(o));
+ }
+ uci_free_element(&s->e);
+}
+
+static struct uci_package *
+uci_alloc_package(struct uci_context *ctx, const char *name)
+{
+ struct uci_package *p;
+
+ p = uci_alloc_element(ctx, package, name, 0);
+ p->ctx = ctx;
+ uci_list_init(&p->sections);
+ return p;
+}
+
+static void
+uci_free_package(struct uci_package *p)
+{
+ struct uci_element *e, *tmp;
+
+ if(!p)
+ return;
+
+ uci_foreach_element_safe(&p->sections, tmp, e) {
+ uci_free_section(uci_to_section(e));
+ }
+ uci_free_element(&p->e);
+}
+
+static struct uci_element *uci_lookup_list(struct uci_context *ctx, struct uci_list *list, char *name)
+{
+ struct uci_element *e;
+
+ uci_foreach_element(list, e) {
+ if (!strcmp(e->name, name))
+ return e;
+ }
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+}
+
+int uci_lookup(struct uci_context *ctx, struct uci_element **res, char *package, char *section, char *option)
+{
+ struct uci_element *e;
+ struct uci_package *p;
+ struct uci_section *s;
+ struct uci_option *o;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, res != NULL);
+ UCI_ASSERT(ctx, package != NULL);
+
+ e = uci_lookup_list(ctx, &ctx->root, package);
+ if (!section)
+ goto found;
+
+ p = uci_to_package(e);
+ e = uci_lookup_list(ctx, &p->sections, section);
+ if (!option)
+ goto found;
+
+ s = uci_to_section(e);
+ e = uci_lookup_list(ctx, &s->options, option);
+
+found:
+ *res = e;
+ return 0;
+}
+
+int uci_unload(struct uci_context *ctx, const char *name)
+{
+ struct uci_element *e;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, name != NULL);
+
+ uci_foreach_element(&ctx->root, e) {
+ if (!strcmp(e->name, name))
+ goto found;
+ }
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+
+found:
+ uci_free_package(uci_to_package(e));
+
+ return 0;
+}
+
+