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authorDaniel Stenberg <daniel@haxx.se>2002-01-03 10:22:59 +0000
committerDaniel Stenberg <daniel@haxx.se>2002-01-03 10:22:59 +0000
commit6de7dc5879b3605a180dafa05f792f132eafdcaa (patch)
tree9684f8c2427082965204ee5589a2ee1e5dc6191d /lib/llist.c
parent6aaee5f23bdc75826a733e40335078b97bfe1967 (diff)
downloadcurl-6de7dc5879b3605a180dafa05f792f132eafdcaa.tar.gz
Sterling Hughes' provided initial DNS cache source code.
Diffstat (limited to 'lib/llist.c')
-rw-r--r--lib/llist.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/lib/llist.c b/lib/llist.c
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+++ b/lib/llist.c
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+/*****************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2001, Daniel Stenberg, <daniel@haxx.se>, et al
+ *
+ * In order to be useful for every potential user, curl and libcurl are
+ * dual-licensed under the MPL and the MIT/X-derivate licenses.
+ *
+ * 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 MPL or the MIT/X-derivate
+ * licenses. You may pick one of these licenses.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * $Id$
+ *****************************************************************************/
+
+#include "setup.h"
+
+
+#include <string.h>
+
+#include "llist.h"
+
+#ifdef MALLOCDEBUG
+/* this must be the last include file */
+#include "memdebug.h"
+#endif
+void
+curl_llist_init(curl_llist *l, curl_llist_dtor dtor)
+{
+ l->size = 0;
+ l->dtor = dtor;
+ l->head = NULL;
+ l->tail = NULL;
+}
+
+curl_llist *
+curl_llist_alloc(curl_llist_dtor dtor)
+{
+ curl_llist *list;
+
+ list = malloc(sizeof(curl_llist));
+ curl_llist_init(list, dtor);
+
+ return list;
+}
+
+int
+curl_llist_insert_next(curl_llist *list, curl_llist_element *e, const void *p)
+{
+ curl_llist_element *ne;
+
+ ne = (curl_llist_element *) malloc(sizeof(curl_llist_element));
+ 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_insert_prev(curl_llist *list, curl_llist_element *e, const void *p)
+{
+ curl_llist_element *ne;
+
+ ne = (curl_llist_element *) malloc(sizeof(curl_llist_element));
+ 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;
+ ne->prev = e->prev;
+ if (e->prev)
+ e->prev->next = ne;
+ else
+ list->head = ne;
+ e->prev = ne;
+ }
+
+ ++list->size;
+
+ return 1;
+}
+
+int
+curl_llist_remove(curl_llist *list, 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;
+}
+
+int
+curl_llist_remove_next(curl_llist *list, curl_llist_element *e, void *user)
+{
+ return curl_llist_remove(list, e->next, user);
+}
+
+int
+curl_llist_remove_prev(curl_llist *list, curl_llist_element *e, void *user)
+{
+ return curl_llist_remove(list, e->prev, user);
+}
+
+size_t
+curl_llist_count(curl_llist *list)
+{
+ return list->size;
+}
+
+void
+curl_llist_destroy(curl_llist *list, void *user)
+{
+ while (list->size > 0) {
+ curl_llist_remove(list, CURL_LLIST_TAIL(list), user);
+ }
+
+ free(list);
+ list = NULL;
+}