mirror of
https://github.com/moparisthebest/curl
synced 2024-11-08 18:45:05 -05:00
c39858aac0
linked list for name resolved data, even on hosts/systems with only IPv4 stacks as this simplifies a lot of code.
131 lines
2.7 KiB
C
131 lines
2.7 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* $Id$
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***************************************************************************/
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#include "setup.h"
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#include <string.h>
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#include <stdlib.h>
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#include "llist.h"
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#include "memory.h"
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/* this must be the last include file */
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#include "memdebug.h"
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void
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Curl_llist_init(curl_llist *l, curl_llist_dtor dtor)
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{
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l->size = 0;
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l->dtor = dtor;
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l->head = NULL;
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l->tail = NULL;
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}
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curl_llist *
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Curl_llist_alloc(curl_llist_dtor dtor)
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{
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curl_llist *list;
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list = (curl_llist *)malloc(sizeof(curl_llist));
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if(NULL == list)
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return NULL;
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Curl_llist_init(list, dtor);
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return list;
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}
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/*
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* Curl_llist_insert_next() returns 1 on success and 0 on failure.
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*/
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int
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Curl_llist_insert_next(curl_llist *list, curl_llist_element *e, const void *p)
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{
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curl_llist_element *ne =
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(curl_llist_element *) malloc(sizeof(curl_llist_element));
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if(!ne)
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return 0;
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ne->ptr = (void *) p;
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if (list->size == 0) {
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list->head = ne;
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list->head->prev = NULL;
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list->head->next = NULL;
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list->tail = ne;
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}
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else {
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ne->next = e->next;
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ne->prev = e;
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if (e->next) {
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e->next->prev = ne;
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}
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else {
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list->tail = ne;
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}
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e->next = ne;
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}
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++list->size;
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return 1;
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}
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int
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Curl_llist_remove(curl_llist *list, curl_llist_element *e, void *user)
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{
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if (e == NULL || list->size == 0)
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return 1;
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if (e == list->head) {
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list->head = e->next;
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if (list->head == NULL)
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list->tail = NULL;
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else
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e->next->prev = NULL;
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} else {
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e->prev->next = e->next;
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if (!e->next)
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list->tail = e->prev;
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else
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e->next->prev = e->prev;
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}
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list->dtor(user, e->ptr);
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free(e);
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--list->size;
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return 1;
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}
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void
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Curl_llist_destroy(curl_llist *list, void *user)
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{
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if(list) {
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while (list->size > 0)
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Curl_llist_remove(list, list->tail, user);
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free(list);
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}
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}
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