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Import of Empire 4.2.12

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Markus Armbruster 2003-08-23 12:23:04 +00:00
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/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---
*
* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
* related information and legal notices. It is expected that any future
* projects/authors will amend these files as needed.
*
* ---
*
* queue.c: implementation of various queuing routines
*
* Known contributors to this file:
* Steve McClure, 1998
*/
#if !defined(_WIN32)
#include <unistd.h>
#endif
#include "misc.h"
#include "queue.h"
void
insque(p, q)
struct qelem *p;
struct qelem *q;
{
p->q_forw = q->q_forw;
p->q_back = q;
q->q_forw->q_back = p;
q->q_forw = p;
}
void
remque(p)
struct qelem *p;
{
p->q_back->q_forw = p->q_forw;
p->q_forw->q_back = p->q_back;
}
void
initque(p)
struct qelem *p;
{
p->q_forw = p;
p->q_back = p;
}
struct qelem *
makeqt(nelem)
int nelem;
{
extern s_char *malloc();
struct qelem *table;
struct qelem *qp;
int i;
table = (struct qelem *) malloc(sizeof(*table) * nelem);
for (i=0,qp=table; i<nelem; i++,qp++)
initque(qp);
return table;
}