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/* Generic single linked list to keep various information
Copyright (C) 1993-2022 Free Software Foundation, Inc.
Contributed by Kresten Krab Thorup.
This file is part of GCC.
GCC 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 3, or (at your option)
any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __GNU_OBJC_LIST_H
#define __GNU_OBJC_LIST_H
struct objc_list
{
void *head;
struct objc_list *tail;
};
/* Return a cons cell produced from (head . tail). */
static inline struct objc_list*
list_cons (void* head, struct objc_list* tail)
{
struct objc_list* cell;
cell = (struct objc_list*)objc_malloc (sizeof (struct objc_list));
cell->head = head;
cell->tail = tail;
return cell;
}
/* Remove the element at the head by replacing it by its
successor. */
static inline void
list_remove_head (struct objc_list** list)
{
if ((*list)->tail)
{
/* Fetch next. */
struct objc_list* tail = (*list)->tail;
/* Copy next to list head. */
*(*list) = *tail;
/* Free next. */
objc_free (tail);
}
else
{
/* Inly one element in list. */
objc_free (*list);
(*list) = 0;
}
}
/* Map FUNCTION over all elements in LIST. */
static inline void
list_mapcar (struct objc_list* list, void(*function)(void*))
{
while (list)
{
(*function) (list->head);
list = list->tail;
}
}
/* Free list (backwards recursive). */
static inline void
list_free (struct objc_list* list)
{
if(list)
{
list_free (list->tail);
objc_free (list);
}
}
#endif /* not __GNU_OBJC_LIST_H */
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