* Copyright (C) 2005 Bernhard Fischer
* Copyright (C) 2006 Rob Landley <rob@landley.net>
*
- * Licensed under the GPL v2, see the file LICENSE in this tarball.
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
+
#include <stdlib.h>
#include "libbb.h"
-#ifdef L_llist_add_to
/* Add data to the start of the linked list. */
-llist_t *llist_add_to(llist_t *old_head, void *data)
+void llist_add_to(llist_t **old_head, void *data)
{
- llist_t *new_head;
-
- new_head = xmalloc(sizeof(llist_t));
+ llist_t *new_head = xmalloc(sizeof(llist_t));
new_head->data = data;
- new_head->link = old_head;
-
- return (new_head);
+ new_head->link = *old_head;
+ *old_head = new_head;
}
-#endif
-#ifdef L_llist_add_to_end
/* Add data to the end of the linked list. */
-llist_t *llist_add_to_end(llist_t *list_head, void *data)
+void llist_add_to_end(llist_t **list_head, void *data)
{
- llist_t *new_item;
-
- new_item = xmalloc(sizeof(llist_t));
+ llist_t *new_item = xmalloc(sizeof(llist_t));
new_item->data = data;
new_item->link = NULL;
- if (list_head == NULL) {
- list_head = new_item;
- } else {
- llist_t *tail = list_head;
- while (tail->link)
- tail = tail->link;
+ if (!*list_head) *list_head = new_item;
+ else {
+ llist_t *tail = *list_head;
+ while (tail->link) tail = tail->link;
tail->link = new_item;
}
- return list_head;
}
-#endif
-#ifdef L_llist_pop
/* Remove first element from the list and return it */
void *llist_pop(llist_t **head)
{
return data;
}
-#endif
-#ifdef L_llist_free
/* Recursively free all elements in the linked list. If freeit != NULL
* call it on each datum in the list */
void llist_free(llist_t *elm, void (*freeit)(void *data))
if (freeit) freeit(data);
}
}
-#endif
+
+/* Reverse list order. Useful since getopt32 saves option params
+ * in reverse order */
+llist_t* rev_llist(llist_t *list)
+{
+ llist_t *new = NULL;
+ while (list) {
+ llist_t *next = list->link;
+ list->link = new;
+ new = list;
+ list = next;
+ }
+ return new;
+}