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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2005, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id: llist.c,v 1.16 2005/01/25 00:06:29 bagder Exp $
***************************************************************************/
#include "setup.h"
#include <string.h>
#include <stdlib.h>
#include "llist.h"
#include "memory.h"
/* this must be the last include file */
#include "memdebug.h"
void
Curl_llist_init(struct curl_llist *l, curl_llist_dtor dtor)
{
l->size = 0;
l->dtor = dtor;
l->head = NULL;
l->tail = NULL;
}
struct curl_llist *
Curl_llist_alloc(curl_llist_dtor dtor)
{
struct curl_llist *list;
list = (struct curl_llist *)malloc(sizeof(struct curl_llist));
if(NULL == list)
return NULL;
Curl_llist_init(list, dtor);
return list;
}
/*
* Curl_llist_insert_next() returns 1 on success and 0 on failure.
*/
int
Curl_llist_insert_next(struct curl_llist *list, struct curl_llist_element *e,
const void *p)
{
struct curl_llist_element *ne =
(struct curl_llist_element *) malloc(sizeof(struct curl_llist_element));
if(!ne)
return 0;
ne->ptr = (void *) p;
if (list->size == 0) {
list->head = ne;
list->head->prev = NULL;
list->head->next = NULL;
list->tail = ne;
}
else {
ne->next = e->next;
ne->prev = e;
if (e->next) {
e->next->prev = ne;
}
else {
list->tail = ne;
}
e->next = ne;
}
++list->size;
return 1;
}
int
Curl_llist_remove(struct curl_llist *list, struct curl_llist_element *e,
void *user)
{
if (e == NULL || list->size == 0)
return 1;
if (e == list->head) {
list->head = e->next;
if (list->head == NULL)
list->tail = NULL;
else
e->next->prev = NULL;
} else {
e->prev->next = e->next;
if (!e->next)
list->tail = e->prev;
else
e->next->prev = e->prev;
}
list->dtor(user, e->ptr);
free(e);
--list->size;
return 1;
}
void
Curl_llist_destroy(struct curl_llist *list, void *user)
{
if(list) {
while (list->size > 0)
Curl_llist_remove(list, list->tail, user);
free(list);
}
}
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