games/sail/game.c

   1 /*      $NetBSD: game.c,v 1.12 2009/03/14 19:35:13 dholland Exp $       */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)game.c      8.2 (Berkeley) 4/28/95";
  36 #else
  37 __RCSID("$NetBSD: game.c,v 1.12 2009/03/14 19:35:13 dholland Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <sys/types.h>
  42 #include <stdbool.h>
  43 #include "extern.h"
  44
  45 int
  46 maxturns(struct ship *ship, bool *af)
  47 {
  48         int turns;
  49
  50         turns = ship->specs->ta;
  51         *af = (ship->file->drift > 1 && turns);
  52         if (*af != false) {
  53                 turns--;
  54                 if (ship->file->FS == 1)
  55                         turns = 0;
  56         }
  57         return turns;
  58 }
  59
  60 int
  61 maxmove(struct ship *ship, int dir, int fs)
  62 {
  63         int riggone = 0, Move, flank = 0;
  64
  65         Move = ship->specs->bs;
  66         if (!ship->specs->rig1)
  67                 riggone++;
  68         if (!ship->specs->rig2)
  69                 riggone++;
  70         if (!ship->specs->rig3)
  71                 riggone++;
  72         if (!ship->specs->rig4)
  73                 riggone++;
  74         if ((ship->file->FS || fs) && fs != -1) {
  75                 flank = 1;
  76                 Move = ship->specs->fs;
  77         }
  78         if (dir == winddir)
  79                 Move -= 1 + WET[windspeed][ship->specs->class-1].B;
  80         else if (dir == winddir + 2 || dir == winddir - 2 ||
  81                  dir == winddir - 6 || dir == winddir + 6)
  82                 Move -= 1 + WET[windspeed][ship->specs->class-1].C;
  83         else if (dir == winddir + 3 || dir == winddir - 3 ||
  84                  dir == winddir - 5 || dir == winddir + 5)
  85                 Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
  86         else if (dir == winddir + 4 || dir == winddir - 4)
  87                 Move = 0;
  88         else
  89                 Move -= WET[windspeed][ship->specs->class-1].A;
  90         Move -= riggone;
  91         Move = Move < 0 ? 0 : Move;
  92         return(Move);
  93 }