diff options
Diffstat (limited to 'protocols/Yahoo/libyahoo2/yahoo_list.c')
| -rw-r--r-- | protocols/Yahoo/libyahoo2/yahoo_list.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/protocols/Yahoo/libyahoo2/yahoo_list.c b/protocols/Yahoo/libyahoo2/yahoo_list.c new file mode 100644 index 0000000000..ae7e86b9c6 --- /dev/null +++ b/protocols/Yahoo/libyahoo2/yahoo_list.c @@ -0,0 +1,236 @@ +/*
+ * yahoo_list.c: linked list routines
+ *
+ * Some code copyright (C) 2002-2004, Philip S Tellis <philip.tellis AT gmx.net>
+ * Other code copyright Meredydd Luff <meredydd AT everybuddy.com>
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Some of this code was borrowed from elist.c in the eb-lite sources
+ *
+ */
+
+#include <stdlib.h>
+
+#include "yahoo_list.h"
+
+YList *y_list_append(YList * list, void *data)
+{
+ YList *n;
+ YList *new_list = (YList *) malloc(sizeof(YList));
+ YList *attach_to = NULL;
+
+ new_list->next = NULL;
+ new_list->data = data;
+
+ for (n = list; n != NULL; n = n->next) {
+ attach_to = n;
+ }
+
+ if (attach_to == NULL) {
+ new_list->prev = NULL;
+ return new_list;
+ } else {
+ new_list->prev = attach_to;
+ attach_to->next = new_list;
+ return list;
+ }
+}
+
+YList *y_list_prepend(YList * list, void *data)
+{
+ YList *n = (YList *) malloc(sizeof(YList));
+
+ n->next = list;
+ n->prev = NULL;
+ n->data = data;
+ if (list)
+ list->prev = n;
+
+ return n;
+}
+
+YList *y_list_concat(YList * list, YList * add)
+{
+ YList *l;
+
+ if(!list)
+ return add;
+
+ if(!add)
+ return list;
+
+ for (l = list; l->next; l = l->next)
+ ;
+
+ l->next = add;
+ add->prev = l;
+
+ return list;
+}
+
+YList *y_list_remove(YList * list, void *data)
+{
+ YList *n;
+
+ for (n = list; n != NULL; n = n->next) {
+ if (n->data == data) {
+ list=y_list_remove_link(list, n);
+ y_list_free_1(n);
+ break;
+ }
+ }
+
+ return list;
+}
+
+/* Warning */
+/* link MUST be part of list */
+/* caller must free link using y_list_free_1 */
+YList *y_list_remove_link(YList * list, const YList * link)
+{
+ if (!link)
+ return list;
+
+ if (link->next)
+ link->next->prev = link->prev;
+ if (link->prev)
+ link->prev->next = link->next;
+
+ if (link == list)
+ list = link->next;
+
+ return list;
+}
+
+int y_list_length(const YList * list)
+{
+ int retval = 0;
+ const YList *n = list;
+
+ for (n = list; n != NULL; n = n->next) {
+ retval++;
+ }
+
+ return retval;
+}
+
+/* well, you could just check for list == NULL, but that would be
+ * implementation dependent
+ */
+int y_list_empty(const YList * list)
+{
+ if(!list)
+ return 1;
+ else
+ return 0;
+}
+
+int y_list_singleton(const YList * list)
+{
+ if(!list || list->next)
+ return 0;
+ return 1;
+}
+
+YList *y_list_copy(YList * list)
+{
+ YList *n;
+ YList *copy = NULL;
+
+ for (n = list; n != NULL; n = n->next) {
+ copy = y_list_append(copy, n->data);
+ }
+
+ return copy;
+}
+
+void y_list_free_1(YList * list)
+{
+ free(list);
+}
+
+void y_list_free(YList * list)
+{
+ YList *n = list;
+
+ while (n != NULL) {
+ YList *next = n->next;
+ free(n);
+ n = next;
+ }
+}
+
+YList *y_list_find(YList * list, const void *data)
+{
+ YList *l;
+ for (l = list; l && l->data != data; l = l->next)
+ ;
+
+ return l;
+}
+
+void y_list_foreach(YList * list, YListFunc fn, void * user_data)
+{
+ for (; list; list = list->next)
+ fn(list->data, user_data);
+}
+
+YList *y_list_find_custom(YList * list, const void *data, YListCompFunc comp)
+{
+ YList *l;
+ for (l = list; l; l = l->next)
+ if (comp(l->data, data) == 0)
+ return l;
+
+ return NULL;
+}
+
+YList *y_list_nth(YList * list, int n)
+{
+ int i=n;
+ for ( ; list && i; list = list->next, i--)
+ ;
+
+ return list;
+}
+
+YList *y_list_insert_sorted(YList * list, void *data, YListCompFunc comp)
+{
+ YList *l, *n, *prev = NULL;
+ if (!list)
+ return y_list_append(list, data);
+
+ n = (YList *) malloc(sizeof(YList));
+ n->data = data;
+ for (l = list; l && comp(l->data, n->data) <= 0; l = l->next)
+ prev = l;
+
+ if (l) {
+ n->prev = l->prev;
+ l->prev = n;
+ } else
+ n->prev = prev;
+
+ n->next = l;
+
+ if(n->prev) {
+ n->prev->next = n;
+ return list;
+ } else {
+ return n;
+ }
+
+}
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