sail/game.c

   1 /*      $NetBSD: game.c,v 1.9 2001/01/04 03:51:24 jwise 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)game.c      8.2 (Berkeley) 4/28/95";
  40 #else
  41 __RCSID("$NetBSD: game.c,v 1.9 2001/01/04 03:51:24 jwise Exp $");
  42 #endif
  43 #endif /* not lint */
  44
  45 #include <sys/types.h>
  46 #include "extern.h"
  47
  48 int     maxturns(struct ship *, char *);
  49 int     maxmove(struct ship *, int, int);
  50
  51 int
  52 maxturns(struct ship *ship, char *af)
  53 {
  54         int turns;
  55
  56         turns = ship->specs->ta;
  57         *af = (ship->file->drift > 1 && turns);
  58         if (*af != '\0') {
  59                 turns--;
  60                 if (ship->file->FS == 1)
  61                         turns = 0;
  62         }
  63         return turns;
  64 }
  65
  66 int
  67 maxmove(struct ship *ship, int dir, int fs)
  68 {
  69         int riggone = 0, Move, flank = 0;
  70
  71         Move = ship->specs->bs;
  72         if (!ship->specs->rig1)
  73                 riggone++;
  74         if (!ship->specs->rig2)
  75                 riggone++;
  76         if (!ship->specs->rig3)
  77                 riggone++;
  78         if (!ship->specs->rig4)
  79                 riggone++;
  80         if ((ship->file->FS || fs) && fs != -1) {
  81                 flank = 1;
  82                 Move = ship->specs->fs;
  83         }
  84         if (dir == winddir)
  85                 Move -= 1 + WET[windspeed][ship->specs->class-1].B;
  86         else if (dir == winddir + 2 || dir == winddir - 2 || dir == winddir - 6 || dir == winddir + 6)
  87                 Move -= 1 + WET[windspeed][ship->specs->class-1].C;
  88         else if (dir == winddir + 3 || dir == winddir - 3 || dir == winddir - 5 || dir == winddir + 5)
  89                 Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
  90         else if (dir == winddir + 4 || dir == winddir - 4)
  91                 Move = 0;
  92         else
  93                 Move -= WET[windspeed][ship->specs->class-1].A;
  94         Move -= riggone;
  95         Move = Move < 0 ? 0 : Move;
  96         return(Move);
  97 }