01be126759
Essentially concludes the merge into NetBSD of those changes in the Linux port of the NetBSD games which it is fairly clear to me should be so merged.
253 lines
6.3 KiB
C
253 lines
6.3 KiB
C
/* $NetBSD: misc.c,v 1.6 2000/02/09 22:27:56 jsm Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)misc.c 8.2 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: misc.c,v 1.6 2000/02/09 22:27:56 jsm Exp $");
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#endif
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#endif /* not lint */
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "extern.h"
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#include "pathnames.h"
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#define distance(x,y) (abs(x) >= abs(y) ? abs(x) + abs(y)/2 : abs(y) + abs(x)/2)
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/* XXX */
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int
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range(from, to)
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struct ship *from, *to;
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{
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int bow1r, bow1c, bow2r, bow2c;
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int stern1r, stern1c, stern2c, stern2r;
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int bb, bs, sb, ss, result;
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if (!to->file->dir)
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return -1;
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stern1r = bow1r = from->file->row;
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stern1c = bow1c = from->file->col;
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stern2r = bow2r = to->file->row;
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stern2c = bow2c = to->file->col;
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result = bb = distance(bow2r - bow1r, bow2c - bow1c);
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if (bb < 5) {
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stern2r += dr[to->file->dir];
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stern2c += dc[to->file->dir];
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stern1r += dr[from->file->dir];
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stern1c += dc[from->file->dir];
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bs = distance((bow2r - stern1r), (bow2c - stern1c));
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sb = distance((bow1r - stern2r), (bow1c - stern2c));
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ss = distance((stern2r - stern1r) ,(stern2c - stern1c));
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result = min(bb, min(bs, min(sb, ss)));
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}
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return result;
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}
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struct ship *
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closestenemy(from, side, anyship)
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struct ship *from;
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char side, anyship;
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{
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struct ship *sp;
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char a;
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int olddist = 30000, dist;
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struct ship *closest = 0;
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a = capship(from)->nationality;
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foreachship(sp) {
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if (sp == from)
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continue;
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if (sp->file->dir == 0)
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continue;
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if (a == capship(sp)->nationality && !anyship)
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continue;
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if (side && gunsbear(from, sp) != side)
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continue;
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dist = range(from, sp);
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if (dist < olddist) {
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closest = sp;
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olddist = dist;
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}
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}
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return closest;
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}
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int
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angle(dr, dc)
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int dr, dc;
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{
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int i;
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if (dc >= 0 && dr > 0)
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i = 0;
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else if (dr <= 0 && dc > 0)
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i = 2;
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else if (dc <= 0 && dr < 0)
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i = 4;
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else
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i = 6;
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dr = abs(dr);
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dc = abs(dc);
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if ((i == 0 || i == 4) && dc * 2.4 > dr) {
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i++;
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if (dc > dr * 2.4)
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i++;
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} else if ((i == 2 || i == 6) && dr * 2.4 > dc) {
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i++;
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if (dr > dc * 2.4)
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i++;
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}
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return i % 8 + 1;
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}
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int
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gunsbear(from, to) /* checks for target bow or stern */
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struct ship *from, *to;
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{
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int Dr, Dc, i;
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int ang;
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Dr = from->file->row - to->file->row;
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Dc = to->file->col - from->file->col;
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for (i = 2; i; i--) {
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if ((ang = angle(Dr, Dc) - from->file->dir + 1) < 1)
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ang += 8;
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if (ang >= 2 && ang <= 4)
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return 'r';
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if (ang >= 6 && ang <= 7)
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return 'l';
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Dr += dr[to->file->dir];
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Dc += dc[to->file->dir];
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}
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return 0;
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}
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int
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portside(from, on, quick)
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struct ship *from, *on;
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int quick; /* returns true if fromship is */
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{ /* shooting at onship's starboard side */
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int ang;
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int Dr, Dc;
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Dr = from->file->row - on->file->row;
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Dc = on->file->col - from->file->col;
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if (quick == -1) {
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Dr += dr[on->file->dir];
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Dc += dc[on->file->dir];
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}
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ang = angle(Dr, Dc);
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if (quick != 0)
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return ang;
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ang = (ang + 4 - on->file->dir - 1) % 8 + 1;
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return ang < 5;
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}
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int
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colours(sp)
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struct ship *sp;
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{
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char flag = '\0';
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if (sp->file->struck)
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flag = '!';
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if (sp->file->explode)
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flag = '#';
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if (sp->file->sink)
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flag = '~';
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if (sp->file->struck)
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return flag;
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flag = *countryname[capship(sp)->nationality];
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return sp->file->FS ? flag : tolower(flag);
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}
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void
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logger(s)
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struct ship *s;
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{
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FILE *fp;
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int persons;
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int n;
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struct logs log[NLOG];
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float net;
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struct logs *lp;
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setegid(egid);
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if ((fp = fopen(_PATH_LOGFILE, "r+")) == NULL) {
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setegid(gid);
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return;
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}
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setegid(gid);
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#ifdef LOCK_EX
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if (flock(fileno(fp), LOCK_EX) < 0)
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return;
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#endif
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net = (float)s->file->points / s->specs->pts;
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persons = getw(fp);
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n = fread((char *)log, sizeof(struct logs), NLOG, fp);
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for (lp = &log[n]; lp < &log[NLOG]; lp++)
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lp->l_name[0] = lp->l_uid = lp->l_shipnum
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= lp->l_gamenum = lp->l_netpoints = 0;
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rewind(fp);
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if (persons < 0)
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(void) putw(1, fp);
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else
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(void) putw(persons + 1, fp);
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for (lp = log; lp < &log[NLOG]; lp++)
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if (net > (float)lp->l_netpoints
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/ scene[lp->l_gamenum].ship[lp->l_shipnum].specs->pts) {
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(void) fwrite((char *)log,
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sizeof (struct logs), lp - log, fp);
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(void) strcpy(log[NLOG-1].l_name, s->file->captain);
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log[NLOG-1].l_uid = getuid();
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log[NLOG-1].l_shipnum = s->file->index;
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log[NLOG-1].l_gamenum = game;
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log[NLOG-1].l_netpoints = s->file->points;
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(void) fwrite((char *)&log[NLOG-1],
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sizeof (struct logs), 1, fp);
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(void) fwrite((char *)lp,
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sizeof (struct logs), &log[NLOG-1] - lp, fp);
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break;
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}
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#ifdef LOCK_EX
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(void) flock(fileno(fp), LOCK_UN);
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#endif
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(void) fclose(fp);
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}
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