66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* queue.c: Various queue routines (for lists)
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*
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* Known contributors to this file:
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*
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*/
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#include <config.h>
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#include "queue.h"
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void
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emp_insque(struct emp_qelem *elem, struct emp_qelem *queue)
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{
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struct emp_qelem *next;
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next = queue->q_forw;
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queue->q_forw = elem;
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elem->q_forw = next;
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elem->q_back = queue;
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next->q_back = elem;
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}
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void
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emp_remque(struct emp_qelem *elem)
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{
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if (!elem)
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return;
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if (elem->q_forw)
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elem->q_forw->q_back = elem->q_back;
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if (elem->q_back)
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elem->q_back->q_forw = elem->q_forw;
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}
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void
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emp_initque(struct emp_qelem *elem)
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{
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elem->q_forw = elem;
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elem->q_back = elem;
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}
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