mirror of
https://github.com/awesomeWM/awesome
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175 lines
13 KiB
C
175 lines
13 KiB
C
/*
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* list.h - useful list handling header
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*
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* Copyright © 2008 Julien Danjou <julien@danjou.info>
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* Copyright © 2006 Pierre Habouzit <madcoder@debian.org>
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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 of the License, or
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* (at your option) 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef AWESOME_COMMON_LIST_H
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#define AWESOME_COMMON_LIST_H
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#define DO_SLIST(type, prefix, dtor) \
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static inline type *prefix##_list_next(type **list __attribute__ ((unused)), \
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type *item) \
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{ \
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return item->next; \
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} \
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\
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static inline type *prefix##_list_pop(type **list) \
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{ \
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if (*list) \
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{ \
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type *res = *list; \
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*list = res->next; \
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if(res->next) \
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res->next->prev = NULL; \
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res->next = NULL; \
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return res; \
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} \
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return NULL; \
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} \
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\
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static inline void prefix##_list_push(type **list, type *item) \
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{ \
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if(*list) \
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(*list)->prev = item; \
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item->next = *list; \
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*list = item; \
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} \
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\
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static inline type **prefix##_list_last(type **list) \
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{ \
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while (*list && (*list)->next) \
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list = &(*list)->next; \
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return list; \
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} \
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\
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static inline void prefix##_list_append(type **list, type *item) \
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{ \
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if(*(list = prefix##_list_last(list))) \
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{ \
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(*list)->next = item; \
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item->prev = *list; \
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} \
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else \
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(*list) = item; \
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} \
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\
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static inline type *prefix##_list_rev(type *list) \
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{ \
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type *l = NULL; \
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while (list) \
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prefix##_list_push(&l, prefix##_list_pop(&list)); \
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return l; \
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} \
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\
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static inline type **prefix##_list_init(type **list) \
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{ \
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*list = NULL; \
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return list; \
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} \
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\
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static inline void prefix##_list_wipe(type **list) \
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{ \
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while (*list) \
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{ \
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type *item = prefix##_list_pop(list); \
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dtor(&item); \
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} \
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} \
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\
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static inline type *prefix##_list_prev(type **list __attribute__ ((unused)), \
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type *item) \
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{ \
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return item->prev; \
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} \
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\
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static inline void prefix##_list_swap(type **list, type *item1, type *item2) \
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{ \
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if(!item1 || !item2) return; \
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\
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type *i1n = item1->next; \
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type *i2n = item2->next; \
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type *i1p = item1->prev; \
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type *i2p = item2->prev; \
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\
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if(item1 == i2n) \
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{ \
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item1->next = item2; \
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item2->prev = item1; \
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if((item1->prev = i2p)) \
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i2p->next = item1; \
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if((item2->next = i1n)) \
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i1n->prev = item2; \
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} \
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else if(item2 == i1n) \
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{ \
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item2->next = item1; \
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item1->prev = item2; \
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if((item2->prev = i1p)) \
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i1p->next = item2; \
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if((item1->next = i2n)) \
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i2n->prev = item1; \
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} \
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else \
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{ \
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if((item1->next = i2n)) \
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item1->next->prev = item1; \
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if((item1->prev = i2p)) \
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item1->prev->next = item1; \
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if((item2->prev = i1p)) \
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item2->prev->next = item2; \
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if((item2->next = i1n)) \
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item2->next->prev = item2; \
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} \
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if(*list == item1) \
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*list = item2; \
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else if(*list == item2) \
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*list = item1; \
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} \
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\
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static inline type *prefix##_list_prev_cycle(type **list, type *item) \
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{ \
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if(!item->prev) \
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return *prefix##_list_last(list); \
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return item->prev; \
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} \
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\
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static inline type *prefix##_list_next_cycle(type **list, type *item) \
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{ \
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if(item->next) \
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return item->next; \
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else \
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return *list; \
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return NULL; \
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} \
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\
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static inline void prefix##_list_detach(type **list, type *item) \
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{ \
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if(item == *list) \
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*list = item->next; \
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else if(item->prev) \
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item->prev->next = item->next; \
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if(item->next) \
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item->next->prev = item->prev; \
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item->next = NULL; \
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item->prev = NULL; \
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} \
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#endif
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// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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