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/*
File: list_add_sorted_uniq.h
Copyright (C) 2006-2008 Christophe GRENIER <grenier@cgsecurity.org>
This software 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 the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _LIST_ADD_SORTED_UNIQ_H
#define _LIST_ADD_SORTED_UNIQ_H
/*@
@ requires \valid(newe);
@ requires \valid(head);
@ requires \valid_function(compar);
@ requires finite(head->prev);
@ requires finite(head);
@ requires separation: \separated(newe, head);
@ requires list_separated(head, newe);
@*/
static inline int td_list_add_sorted_uniq(struct td_list_head *newe, struct td_list_head *head,
int (*compar)(const struct td_list_head *a, const struct td_list_head *b))
{
struct td_list_head *pos;
/*@
@ loop invariant \valid(pos);
@ loop invariant \valid(pos->prev);
@ loop invariant \valid(pos->next);
@ loop invariant pos == head || \separated(pos, head);
@ loop invariant \valid_function(compar);
@ loop invariant finite(head->prev);
@ loop invariant finite(head);
@ loop invariant finite(pos->prev);
@ loop invariant finite(pos);
@ loop assigns pos;
@*/
td_list_for_each(pos, head)
{
/*@ assert \valid_function(compar); */
// TODO const
/* calls spacerange_cmp; */
int res=compar(newe,pos);
/*@ assert \valid(pos); */
/*@ assert \valid(pos->prev); */
/*@ assert \valid(pos->next); */
if(res<0)
{
__td_list_add(newe, pos->prev, pos);
return 0;
}
else if(res==0)
return 1;
}
/*@ assert finite(head->prev); */
/*@ assert finite(head); */
/*@ assert list_separated(head->prev, newe); */
/*@ assert list_separated(head, newe); */
td_list_add_tail(newe, head);
return 0;
}
#endif
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