/*
list.c -- functions to deal with double linked lists
- Copyright (C) 2000 Ivo Timmermans <itimmermans@bigfoot.com>
- 2000 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 2000-2005 Ivo Timmermans
+ 2000-2006 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: list.c,v 1.1.2.7 2001/01/07 15:24:52 guus Exp $
+ $Id$
*/
-#include "config.h"
-
-#include <stdlib.h>
-
-#include <xalloc.h>
-#include <system.h>
+#include "system.h"
#include "list.h"
+#include "xalloc.h"
/* (De)constructors */
list_t *list_alloc(list_action_t delete)
{
- list_t *list;
+ list_t *list;
- list = xmalloc_and_zero(sizeof(list_t));
- list->delete = delete;
+ list = xmalloc_and_zero(sizeof(list_t));
+ list->delete = delete;
- return list;
+ return list;
}
void list_free(list_t *list)
{
- free(list);
+ free(list);
}
list_node_t *list_alloc_node(void)
{
- list_node_t *node;
-
- node = xmalloc_and_zero(sizeof(list_node_t));
-
- return node;
+ return xmalloc_and_zero(sizeof(list_node_t));
}
void list_free_node(list_t *list, list_node_t *node)
{
- if(node->data && list->delete)
- list->delete(node->data);
-
- free(node->data);
+ if(node->data && list->delete)
+ list->delete(node->data);
+
+ free(node);
}
/* Insertion and deletion */
list_node_t *list_insert_head(list_t *list, void *data)
{
- list_node_t *node;
-
- node = list_alloc_node();
-
- node->data = data;
- node->prev = NULL;
- node->next = list->head;
- list->head = node;
-
- if(node->next)
- node->next->prev = node;
- else
- list->tail = node;
-
- return node;
+ list_node_t *node;
+
+ node = list_alloc_node();
+
+ node->data = data;
+ node->prev = NULL;
+ node->next = list->head;
+ list->head = node;
+
+ if(node->next)
+ node->next->prev = node;
+ else
+ list->tail = node;
+
+ list->count++;
+
+ return node;
}
list_node_t *list_insert_tail(list_t *list, void *data)
{
- list_node_t *node;
-
- node = list_alloc_node();
-
- node->data = data;
- node->next = NULL;
- node->prev = list->tail;
- list->tail = node;
-
- if(node->prev)
- node->prev->next = node;
- else
- list->head = node;
-
- return node;
+ list_node_t *node;
+
+ node = list_alloc_node();
+
+ node->data = data;
+ node->next = NULL;
+ node->prev = list->tail;
+ list->tail = node;
+
+ if(node->prev)
+ node->prev->next = node;
+ else
+ list->head = node;
+
+ list->count++;
+
+ return node;
}
void list_unlink_node(list_t *list, list_node_t *node)
{
- if(node->prev)
- node->prev->next = node->next;
- else
- list->head = node->next;
-
- if(node->next)
- node->next->prev = node->prev;
- else
- list->tail = node->prev;
+ if(node->prev)
+ node->prev->next = node->next;
+ else
+ list->head = node->next;
+
+ if(node->next)
+ node->next->prev = node->prev;
+ else
+ list->tail = node->prev;
+
+ list->count--;
}
void list_delete_node(list_t *list, list_node_t *node)
{
- list_unlink_node(list, node);
- list_free_node(list, node);
+ list_unlink_node(list, node);
+ list_free_node(list, node);
}
void list_delete_head(list_t *list)
{
- list_delete_node(list, list->head);
+ list_delete_node(list, list->head);
}
void list_delete_tail(list_t *list)
{
- list_delete_node(list, list->tail);
+ list_delete_node(list, list->tail);
}
/* Head/tail lookup */
void *list_get_head(list_t *list)
{
- if(list->head)
- return list->head->data;
- else
- return NULL;
+ if(list->head)
+ return list->head->data;
+ else
+ return NULL;
}
void *list_get_tail(list_t *list)
{
- if(list->tail)
- return list->tail->data;
- else
- return NULL;
+ if(list->tail)
+ return list->tail->data;
+ else
+ return NULL;
}
/* Fast list deletion */
void list_delete_list(list_t *list)
{
- list_node_t *node, *next;
-
- for(node = list->head; node; node = next)
- {
- next = node->next;
- list_free_node(list, node);
- }
-
- list_free(list);
+ list_node_t *node, *next;
+
+ for(node = list->head; node; node = next) {
+ next = node->next;
+ list_free_node(list, node);
+ }
+
+ list_free(list);
}
/* Traversing */
void list_foreach_node(list_t *list, list_action_node_t action)
{
- list_node_t *node, *next;
+ list_node_t *node, *next;
- for(node = list->head; node; node = next)
- {
- next = node->next;
- action(node);
- }
+ for(node = list->head; node; node = next) {
+ next = node->next;
+ action(node);
+ }
}
void list_foreach(list_t *list, list_action_t action)
{
- list_node_t *node, *next;
-
- for(node = list->head; node; node = next)
- {
- next = node->next;
- if(node->data)
- action(node->data);
- }
+ list_node_t *node, *next;
+
+ for(node = list->head; node; node = next) {
+ next = node->next;
+ if(node->data)
+ action(node->data);
+ }
}