*
*/
/*
- Copyright (C) 2000-2003 Kern Sibbald and John Walker
+ Copyright (C) 2000-2004 Kern Sibbald and John Walker
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
*/
void dlist::append(void *item)
{
- ((dlink *)((char *)item+loffset))->next = NULL;
- ((dlink *)((char *)item+loffset))->prev = tail;
+ ((dlink *)(((char *)item)+loffset))->next = NULL;
+ ((dlink *)(((char *)item)+loffset))->prev = tail;
if (tail) {
- ((dlink *)((char *)tail+loffset))->next = item;
+ ((dlink *)(((char *)tail)+loffset))->next = item;
}
tail = item;
if (head == NULL) { /* if empty list, */
head = item; /* item is head as well */
}
+ num_items++;
}
/*
*/
void dlist::prepend(void *item)
{
- ((dlink *)((char *)item+loffset))->next = head;
- ((dlink *)((char *)item+loffset))->prev = NULL;
+ ((dlink *)(((char *)item)+loffset))->next = head;
+ ((dlink *)(((char *)item)+loffset))->prev = NULL;
if (head) {
- ((dlink *)((char *)head+loffset))->prev = item;
+ ((dlink *)(((char *)head)+loffset))->prev = item;
}
head = item;
if (tail == NULL) { /* if empty list, */
tail = item; /* item is tail too */
}
+ num_items++;
}
void dlist::insert_before(void *item, void *where)
{
dlink *where_link = (dlink *)((char *)where+loffset);
- ((dlink *)((char *)item+loffset))->next = where;
- ((dlink *)((char *)item+loffset))->prev = where_link->prev;
+ ((dlink *)(((char *)item)+loffset))->next = where;
+ ((dlink *)(((char *)item)+loffset))->prev = where_link->prev;
if (where_link->prev) {
- ((dlink *)((char *)(where_link->prev)+loffset))->next = item;
- where_link->prev = item;
+ ((dlink *)(((char *)(where_link->prev))+loffset))->next = item;
}
+ where_link->prev = item;
if (head == where) {
head = item;
}
+ num_items++;
}
void dlist::insert_after(void *item, void *where)
{
dlink *where_link = (dlink *)((char *)where+loffset);
- ((dlink *)((char *)item+loffset))->next = where_link->next;
- ((dlink *)((char *)item+loffset))->prev = where;
+ ((dlink *)(((char *)item)+loffset))->next = where_link->next;
+ ((dlink *)(((char *)item)+loffset))->prev = where;
if (where_link->next) {
- ((dlink *)((char *)(where_link->next)+loffset))->prev = item;
- where_link->next = item;
+ ((dlink *)(((char *)(where_link->next))+loffset))->prev = item;
}
+ where_link->next = item;
if (tail == where) {
tail = item;
}
+ num_items++;
}
void dlist::remove(void *item)
{
void *xitem;
- dlink *ilink = (dlink *)((char *)item+loffset); /* item's link */
+ dlink *ilink = (dlink *)(((char *)item)+loffset); /* item's link */
if (item == head) {
head = ilink->next;
if (head) {
- ((dlink *)((char *)head+loffset))->prev = NULL;
+ ((dlink *)(((char *)head)+loffset))->prev = NULL;
}
if (item == tail) {
tail = ilink->prev;
} else if (item == tail) {
tail = ilink->prev;
if (tail) {
- ((dlink *)((char *)tail+loffset))->next = NULL;
+ ((dlink *)(((char *)tail)+loffset))->next = NULL;
}
} else {
xitem = ilink->next;
- ((dlink *)((char *)xitem+loffset))->prev = ilink->prev;
+ ((dlink *)(((char *)xitem)+loffset))->prev = ilink->prev;
xitem = ilink->prev;
- ((dlink *)((char *)xitem+loffset))->next = ilink->next;
+ ((dlink *)(((char *)xitem)+loffset))->next = ilink->next;
}
+ num_items--;
}
void * dlist::next(void *item)
if (item == NULL) {
return head;
}
- return ((dlink *)((char *)item+loffset))->next;
+ return ((dlink *)(((char *)item)+loffset))->next;
}
void * dlist::prev(void *item)
if (item == NULL) {
return tail;
}
- return ((dlink *)((char *)item+loffset))->prev;
+ return ((dlink *)(((char *)item)+loffset))->prev;
}
-/* Destroy the list and its contents */
+/* Destroy the list contents */
void dlist::destroy()
{
for (void *n=head; n; ) {
- void *ni = ((dlink *)((char *)n+loffset))->next;
+ void *ni = ((dlink *)(((char *)n)+loffset))->next;
free(n);
n = ni;
}
+ num_items = 0;
}
struct MYJCR {
char *buf;
- dlist link;
+ dlink link;
};
int main()
jcr_chain->insert_before(jcr, next_jcr);
printf("Print remaining list.\n");
- for (MYJCR *jcr=NULL; (jcr=(MYJCR *)jcr_chain->next(jcr)); ) {
+ foreach_dlist (jcr, jcr_chain) {
printf("Dlist item = %s\n", jcr->buf);
free(jcr->buf);
}
jcr_chain->insert_before(jcr, next_jcr);
printf("Print remaining list.\n");
- for (MYJCR *jcr=NULL; (jcr=(MYJCR *)jcr_chain->next(jcr)); ) {
+ foreach_dlist (jcr, jcr_chain) {
printf("Dlist item = %s\n", jcr->buf);
free(jcr->buf);
}