You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
3.2 KiB
113 lines
3.2 KiB
5 months ago
|
/* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License, version 2.0,
|
||
|
|
as published by the Free Software Foundation.
|
||
|
|
|
||
|
|
This program is also distributed with certain software (including
|
||
|
|
but not limited to OpenSSL) that is licensed under separate terms,
|
||
|
|
as designated in a particular file or component or in included license
|
||
|
|
documentation. The authors of MySQL hereby grant you an additional
|
||
|
|
permission to link the program and your derivative works with the
|
||
|
|
separately licensed software that they have included with MySQL.
|
||
|
|
|
||
|
|
Without limiting anything contained in the foregoing, this file,
|
||
|
|
which is part of C Driver for MySQL (Connector/C), is also subject to the
|
||
|
|
Universal FOSS Exception, version 1.0, a copy of which can be found at
|
||
|
|
http://oss.oracle.com/licenses/universal-foss-exception.
|
||
|
|
|
||
|
|
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, version 2.0, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
|
||
|
|
|
||
|
|
/**
|
||
|
|
@file mysys/list.cc
|
||
|
|
Code for handling double-linked lists in C.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
#include "my_dbug.h"
|
||
|
|
#include "my_inttypes.h"
|
||
|
|
#include "my_list.h"
|
||
|
|
#include "my_sys.h"
|
||
|
|
#include "mysql/service_mysql_alloc.h"
|
||
|
|
#include "mysys/mysys_priv.h"
|
||
|
|
|
||
|
|
/* Add a element to start of list */
|
||
|
|
|
||
|
|
LIST *list_add(LIST *root, LIST *element) {
|
||
|
|
DBUG_TRACE;
|
||
|
|
DBUG_PRINT("enter", ("root: %p element: %p", root, element));
|
||
|
|
if (root) {
|
||
|
|
if (root->prev) /* If add in mid of list */
|
||
|
|
root->prev->next = element;
|
||
|
|
element->prev = root->prev;
|
||
|
|
root->prev = element;
|
||
|
|
} else
|
||
|
|
element->prev = 0;
|
||
|
|
element->next = root;
|
||
|
|
return element; /* New root */
|
||
|
|
}
|
||
|
|
|
||
|
|
LIST *list_delete(LIST *root, LIST *element) {
|
||
|
|
if (element->prev)
|
||
|
|
element->prev->next = element->next;
|
||
|
|
else
|
||
|
|
root = element->next;
|
||
|
|
if (element->next) element->next->prev = element->prev;
|
||
|
|
return root;
|
||
|
|
}
|
||
|
|
|
||
|
|
void list_free(LIST *root, uint free_data) {
|
||
|
|
LIST *next;
|
||
|
|
while (root) {
|
||
|
|
next = root->next;
|
||
|
|
if (free_data) my_free(root->data);
|
||
|
|
my_free(root);
|
||
|
|
root = next;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
LIST *list_cons(void *data, LIST *list) {
|
||
|
|
LIST *new_charset =
|
||
|
|
(LIST *)my_malloc(key_memory_LIST, sizeof(LIST), MYF(MY_FAE));
|
||
|
|
if (!new_charset) return 0;
|
||
|
|
new_charset->data = data;
|
||
|
|
return list_add(list, new_charset);
|
||
|
|
}
|
||
|
|
|
||
|
|
LIST *list_reverse(LIST *root) {
|
||
|
|
LIST *last;
|
||
|
|
|
||
|
|
last = root;
|
||
|
|
while (root) {
|
||
|
|
last = root;
|
||
|
|
root = root->next;
|
||
|
|
last->next = last->prev;
|
||
|
|
last->prev = root;
|
||
|
|
}
|
||
|
|
return last;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint list_length(LIST *list) {
|
||
|
|
uint count;
|
||
|
|
for (count = 0; list; list = list->next, count++)
|
||
|
|
;
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
int list_walk(LIST *list, list_walk_action action, uchar *argument) {
|
||
|
|
int error = 0;
|
||
|
|
while (list) {
|
||
|
|
if ((error = (*action)(list->data, argument))) return error;
|
||
|
|
list = list_rest(list);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|