91 lines
2 KiB
C
91 lines
2 KiB
C
/***************************************************************************
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list.c
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Linked lists management routines
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(c) 2000-2007 Benoît Minisini <gambas@users.sourceforge.net>
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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 1, or (at your option)
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any later version.
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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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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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***************************************************************************/
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#define __GB_LIST_C
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#include "gb_common.h"
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#include "gb_list.h"
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/*#define DEBUG*/
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#define TO_LIST(_node) ((LIST *)(((char *)_node) + ((char *)list - (char *)node)))
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PUBLIC void LIST_insert(void *p_first, void *node, LIST *list)
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{
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void **first = (void **)p_first;
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void *last;
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if (*first == NULL)
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{
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*first = node;
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TO_LIST(node)->prev = node;
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TO_LIST(node)->next = NULL;
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return;
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}
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last = TO_LIST(*first)->prev;
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TO_LIST(last)->next = node;
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TO_LIST(node)->prev = last;
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TO_LIST(node)->next = NULL;
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TO_LIST(*first)->prev = node;
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}
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PUBLIC void LIST_remove(void *p_first, void *node, LIST *list)
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{
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void **first = (void **)p_first;
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void *next, *prev, *last;
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next = TO_LIST(node)->next;
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prev = TO_LIST(node)->prev;
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if (*first == node)
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{
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if (next)
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TO_LIST(next)->prev = prev;
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*first = next;
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}
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else
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{
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last = TO_LIST(*first)->prev;
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if (node == last)
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TO_LIST(*first)->prev = prev;
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if (prev)
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TO_LIST(prev)->next = next;
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if (next)
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TO_LIST(next)->prev = prev;
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}
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TO_LIST(node)->prev = NULL;
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TO_LIST(node)->next = NULL;
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}
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