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/*
* Copyright (c) 2003-2006 by FlashCode <flashcode@flashtux.org>
* See README for License detail, AUTHORS for developers list.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* weelist.c: sorted lists management */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "weechat.h"
#include "weelist.h"
/*
* weelist_search: search date in a list
*/
t_weelist *
weelist_search (t_weelist *weelist, char *data)
{
t_weelist *ptr_weelist;
for (ptr_weelist = weelist; ptr_weelist; ptr_weelist = ptr_weelist->next_weelist)
{
if (ascii_strcasecmp (data, ptr_weelist->data) == 0)
return ptr_weelist;
}
/* word not found in list */
return NULL;
}
/*
* weelist_find_pos: find position for data (keeping list sorted)
*/
t_weelist *
weelist_find_pos (t_weelist *weelist, char *data)
{
t_weelist *ptr_weelist;
for (ptr_weelist = weelist; ptr_weelist; ptr_weelist = ptr_weelist->next_weelist)
{
if (ascii_strcasecmp (data, ptr_weelist->data) < 0)
return ptr_weelist;
}
/* position not found, best position is at the end */
return NULL;
}
/*
* weelist_insert: insert an element to the list (at good position)
*/
void
weelist_insert (t_weelist **weelist, t_weelist **last_weelist, t_weelist *element)
{
t_weelist *pos_weelist;
pos_weelist = weelist_find_pos (*weelist, element->data);
if (*weelist)
{
if (pos_weelist)
{
/* insert data into the list (before position found) */
element->prev_weelist = pos_weelist->prev_weelist;
element->next_weelist = pos_weelist;
if (pos_weelist->prev_weelist)
pos_weelist->prev_weelist->next_weelist = element;
else
*weelist = element;
pos_weelist->prev_weelist = element;
}
else
{
/* add data to the end */
element->prev_weelist = *last_weelist;
element->next_weelist = NULL;
(*last_weelist)->next_weelist = element;
*last_weelist = element;
}
}
else
{
element->prev_weelist = NULL;
element->next_weelist = NULL;
*weelist = element;
*last_weelist = element;
}
}
/*
* weelist_add: create new data and add it to list
*/
t_weelist *
weelist_add (t_weelist **weelist, t_weelist **last_weelist, char *data)
{
t_weelist *new_weelist;
if (!data || (!data[0]))
return NULL;
if ((new_weelist = ((t_weelist *) malloc (sizeof (t_weelist)))))
{
new_weelist->data = strdup (data);
weelist_insert (weelist, last_weelist, new_weelist);
return new_weelist;
}
/* failed to allocate new element */
return NULL;
}
/*
* weelist_remove: free an element in a list
*/
void
weelist_remove (t_weelist **weelist, t_weelist **last_weelist, t_weelist *element)
{
t_weelist *new_weelist;
if (!element)
return;
/* remove element from list */
if (*last_weelist == element)
*last_weelist = element->prev_weelist;
if (element->prev_weelist)
{
(element->prev_weelist)->next_weelist = element->next_weelist;
new_weelist = *weelist;
}
else
new_weelist = element->next_weelist;
if (element->next_weelist)
(element->next_weelist)->prev_weelist = element->prev_weelist;
/* free data */
if (element->data)
free (element->data);
free (element);
*weelist = new_weelist;
}
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