95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/* Generic single linked list to keep various information
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Copyright (C) 1993-2019 Free Software Foundation, Inc.
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Contributed by Kresten Krab Thorup.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef __GNU_OBJC_LIST_H
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#define __GNU_OBJC_LIST_H
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struct objc_list
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{
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void *head;
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struct objc_list *tail;
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};
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/* Return a cons cell produced from (head . tail). */
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static inline struct objc_list*
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list_cons (void* head, struct objc_list* tail)
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{
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struct objc_list* cell;
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cell = (struct objc_list*)objc_malloc (sizeof (struct objc_list));
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cell->head = head;
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cell->tail = tail;
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return cell;
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}
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/* Remove the element at the head by replacing it by its
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successor. */
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static inline void
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list_remove_head (struct objc_list** list)
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{
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if ((*list)->tail)
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{
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/* Fetch next. */
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struct objc_list* tail = (*list)->tail;
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/* Copy next to list head. */
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*(*list) = *tail;
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/* Free next. */
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objc_free (tail);
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}
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else
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{
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/* Inly one element in list. */
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objc_free (*list);
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(*list) = 0;
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}
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}
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/* Map FUNCTION over all elements in LIST. */
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static inline void
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list_mapcar (struct objc_list* list, void(*function)(void*))
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{
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while (list)
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{
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(*function) (list->head);
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list = list->tail;
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}
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}
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/* Free list (backwards recursive). */
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static inline void
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list_free (struct objc_list* list)
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{
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if(list)
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{
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list_free (list->tail);
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objc_free (list);
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}
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}
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#endif /* not __GNU_OBJC_LIST_H */
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