more list handling

[project/uci.git] / list.c

diff --git a/list.c b/list.c
index 43b58f4..5888042 100644 (file)
--- a/list.c
+++ b/list.c
@@ -12,3 +12,58 @@
  * GNU General Public License for more details.
  */
 
+/* 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_add(struct uci_list *prev, struct uci_list *next, struct uci_list *ptr)
+{
+       prev->next = ptr;
+       next->prev = ptr;
+       ptr->prev = prev;
+       ptr->next = next;
+}
+
+/* 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_add(head->prev, head, 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;
+}
+
+static struct uci_config *uci_alloc_file(struct uci_context *ctx, const char *name)
+{
+       struct uci_config *cfg;
+
+       cfg = (struct uci_config *) uci_malloc(ctx, sizeof(struct uci_config));
+       uci_list_init(&cfg->list);
+       uci_list_init(&cfg->sections);
+       cfg->name = uci_strdup(ctx, name);
+       cfg->ctx = ctx;
+
+       return cfg;
+}
+
+static void uci_drop_file(struct uci_config *cfg)
+{
+       /* TODO: free children */
+       uci_list_del(&cfg->list);
+       if (cfg->name)
+               free(cfg->name);
+       free(cfg);
+}