This commit is contained in:
Bernhard Reutner-Fischer 2007-02-04 20:32:38 +00:00
parent 7154b99c89
commit d909d23451

View File

@ -14,37 +14,44 @@
#include "libbb.h"
/* Add data to the start of the linked list. */
void llist_add_to(llist_t **old_head, void *data)
void llist_add_to(llist_t ** old_head, void *data)
{
llist_t *new_head = xmalloc(sizeof(llist_t));
new_head->data = data;
new_head->link = *old_head;
*old_head = new_head;
}
/* Add data to the end of the linked list. */
void 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 = xmalloc(sizeof(llist_t));
new_item->data = data;
new_item->link = NULL;
if (!*list_head) *list_head = new_item;
if (!*list_head)
*list_head = new_item;
else {
llist_t *tail = *list_head;
while (tail->link) tail = tail->link;
while (tail->link)
tail = tail->link;
tail->link = new_item;
}
}
/* Remove first element from the list and return it */
void *llist_pop(llist_t **head)
void *llist_pop(llist_t ** head)
{
void *data;
if(!*head) data = *head;
if (!*head)
data = *head;
else {
void *next = (*head)->link;
data = (*head)->data;
free(*head);
*head = next;
@ -55,21 +62,25 @@ void *llist_pop(llist_t **head)
/* 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))
void llist_free(llist_t * elm, void (*freeit) (void *data))
{
while (elm) {
void *data = llist_pop(&elm);
if (freeit) freeit(data);
if (freeit)
freeit(data);
}
}
/* Reverse list order. Useful since getopt32 saves option params
* in reverse order */
llist_t* rev_llist(llist_t *list)
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;