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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2001, 2004-2005, 2007-2008, 2010-2012 Free
Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <mailutils/sys/list.h>
#include <mailutils/errno.h>
int
_mu_list_ptr_comparator (const void *item, const void *value)
{
return item != value;
}
int
mu_list_locate (mu_list_t list, void *item, void **ret_item)
{
struct list_data *current, *previous;
mu_list_comparator_t comp;
int status = MU_ERR_NOENT;
if (list == NULL)
return EINVAL;
comp = list->comp ? list->comp : _mu_list_ptr_comparator;
mu_monitor_wrlock (list->monitor);
for (previous = &list->head, current = list->head.next;
current != &list->head; previous = current, current = current->next)
{
if (comp (current->item, item) == 0)
{
if (ret_item)
*ret_item = current->item;
status = 0;
break;
}
}
mu_monitor_unlock (list->monitor);
return status;
}
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