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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, 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 https://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.
*
***************************************************************************/
#include "curl_setup.h"
#include <curl/curl.h>
#include "llist.h"
#include "curl_memory.h"
/* this must be the last include file */
#include "memdebug.h"
/*
* @unittest: 1300
*/
void
Curl_llist_init(struct curl_llist *l, curl_llist_dtor dtor)
{
l->size = 0;
l->dtor = dtor;
l->head = NULL;
l->tail = NULL;
}
/*
* Curl_llist_insert_next()
*
* Inserts a new list element after the given one 'e'. If the given existing
* entry is NULL and the list already has elements, the new one will be
* inserted first in the list.
*
* The 'ne' argument should be a pointer into the object to store.
*
* @unittest: 1300
*/
void
Curl_llist_insert_next(struct curl_llist *list, struct curl_llist_element *e,
const void *p,
struct curl_llist_element *ne)
{
ne->ptr = (void *) p;
if(list->size == 0) {
list->head = ne;
list->head->prev = NULL;
list->head->next = NULL;
list->tail = ne;
}
else {
/* if 'e' is NULL here, we insert the new element first in the list */
ne->next = e?e->next:list->head;
ne->prev = e;
if(!e) {
list->head->prev = ne;
list->head = ne;
}
else if(e->next) {
e->next->prev = ne;
}
else {
list->tail = ne;
}
if(e)
e->next = ne;
}
++list->size;
}
/*
* @unittest: 1300
*/
void
Curl_llist_remove(struct curl_llist *list, struct curl_llist_element *e,
void *user)
{
void *ptr;
if(e == NULL || list->size == 0)
return;
if(e == list->head) {
list->head = e->next;
if(list->head == NULL)
list->tail = NULL;
else
e->next->prev = NULL;
}
else {
if(!e->prev)
list->head = e->next;
else
e->prev->next = e->next;
if(!e->next)
list->tail = e->prev;
else
e->next->prev = e->prev;
}
ptr = e->ptr;
e->ptr = NULL;
e->prev = NULL;
e->next = NULL;
--list->size;
/* call the dtor() last for when it actually frees the 'e' memory itself */
if(list->dtor)
list->dtor(user, ptr);
}
void
Curl_llist_destroy(struct curl_llist *list, void *user)
{
if(list) {
while(list->size > 0)
Curl_llist_remove(list, list->tail, user);
}
}
size_t
Curl_llist_count(struct curl_llist *list)
{
return list->size;
}
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