list.c

   1 /*
   2  * libuci - Library for the Unified Configuration Interface
   3  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   4  *
   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
   8  *
   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.
  13  */
  14
  15 /* initialize a list head/item */
  16 static inline void uci_list_init(struct uci_list *ptr)
  17 {
  18         ptr->prev = ptr;
  19         ptr->next = ptr;
  20 }
  21
  22 /* inserts a new list entry between two consecutive entries */
  23 static inline void __uci_list_add(struct uci_list *prev, struct uci_list *next, struct uci_list *ptr)
  24 {
  25         prev->next = ptr;
  26         next->prev = ptr;
  27         ptr->prev = prev;
  28         ptr->next = next;
  29 }
  30
  31 /* inserts a new list entry at the tail of the list */
  32 static inline void uci_list_add(struct uci_list *head, struct uci_list *ptr)
  33 {
  34         /* NB: head->prev points at the tail */
  35         __uci_list_add(head->prev, head, ptr);
  36 }
  37
  38
  39 static struct uci_config *uci_add_file(struct uci_context *ctx, const char *name)
  40 {
  41         struct uci_config *cfg;
  42
  43         cfg = (struct uci_config *) uci_malloc(ctx, sizeof(struct uci_config));
  44         uci_list_init(&cfg->list);
  45         uci_list_init(&cfg->sections);
  46         cfg->name = uci_strdup(ctx, name);
  47         uci_list_add(&ctx->root, &cfg->list);
  48
  49         return cfg;
  50 }