2 /* doubly linked lists */
3 /* This is free software. No strings attached. No copyright claimed */
9 char *strncpy(char *dest, const char *src, size_t n) __THROW;
11 void *xcalloc(size_t num, size_t size);
25 struct __dl_head *vv = v;
35 void dl_insert(void *head, void *val)
37 dl_next(val) = dl_next(head);
39 dl_next(dl_prev(val)) = val;
40 dl_prev(dl_next(val)) = val;
43 void dl_add(void *head, void *val)
45 dl_prev(val) = dl_prev(head);
47 dl_next(dl_prev(val)) = val;
48 dl_prev(dl_next(val)) = val;
51 void dl_del(void *val)
53 if (dl_prev(val) == 0 || dl_next(val) == 0)
55 dl_prev(dl_next(val)) = dl_prev(val);
56 dl_next(dl_prev(val)) = dl_next(val);
57 dl_prev(val) = dl_next(val) = 0;
60 char *dl_strndup(char *s, int l)
65 n = dl_newv(char, l+1);
71 char *dl_strdup(char *s)
73 return dl_strndup(s, (int)strlen(s));