2 /* doubly linked lists */
21 struct __dl_head *vv = v;
26 void dl_insert(void *head, void *val)
28 dl_next(val) = dl_next(head);
30 dl_next(dl_prev(val)) = val;
31 dl_prev(dl_next(val)) = val;
34 void dl_add(void *head, void *val)
36 dl_prev(val) = dl_prev(head);
38 dl_next(dl_prev(val)) = val;
39 dl_prev(dl_next(val)) = val;
42 void dl_del(void *val)
44 if (dl_prev(val) == 0 || dl_next(val) == 0)
46 dl_prev(dl_next(val)) = dl_prev(val);
47 dl_next(dl_prev(val)) = dl_next(val);
48 dl_prev(val) = dl_next(val) = 0;
51 char *dl_strndup(char *s, int l)
56 n = dl_newv(char, l+1);
67 char *dl_strdup(char *s)
69 return dl_strndup(s, (int)strlen(s));