100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
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/*
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* list.h - Embedded lists C interface
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*
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* Copyright (C) 2012 Tobias Boege <tobias@gambas-buch.de>
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*
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* This program 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 2, or (at your option)
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* any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef __LIST_H
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#define __LIST_H
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#include "gambas.h"
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typedef struct list {
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struct list *prev, *next;
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} LIST;
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#define INIT_LIST(name) {&name, &name}
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#define DECLARE_LIST(name) LIST name = INIT_LIST(name)
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#define LIST_data(list, type, member) \
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((type *) ((char *) (list) - offsetof(type, member)))
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/* All but the entry node */
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#define list_for_each(_node, _list) \
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for (_node = (_list)->next; _node != (_list); _node = _node->next)
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#define list_for_each_prev(_node, _list) \
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for (_node = (_list)->prev; _node != (_list); _node = _node->prev)
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/* All, including the entry node (at the beginning of the loop) */
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#define list_for_each_first(_node, _list, _c) \
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for (_node = (_list), _c = 1; _node != (_list) || _c--; \
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_node = _node->next)
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#define list_for_each_prev_first(_node, _list, _c) \
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for (_node = (_list), _c = 1; _node != (_list) || _c--; \
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_node = _node->prev)
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/* All but entry node, may modify the list */
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#define list_for_each_safe(_node, _list, _next) \
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for (_node = (_list)->next, _next = _node->next; _node != (_list);\
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_node = _next, _next = _node->next)
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static inline void LIST_init(LIST *list)
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{
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list->prev = list->next = list;
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}
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static inline int LIST_is_empty(LIST *list)
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{
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return list->next == list;
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}
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static inline void LIST_prepend(LIST *list, LIST *new)
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{
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register LIST *new_end = new->prev;
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list->prev->next = new;
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new->prev = list->prev;
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new_end->next = list;
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list->prev = new_end;
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}
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static inline void LIST_append(LIST *list, LIST *new)
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{
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register LIST *new_end = new->prev;
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new_end->next = list->next;
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list->next->prev = new_end;
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new->prev = list;
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list->next = new;
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}
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static inline LIST *LIST_unlink(LIST *node)
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{
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node->prev->next = node->next;
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node->next->prev = node->prev;
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node->prev = node->next = node;
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return node;
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}
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#endif /* !__LIST_H */
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