sail/game.c

   1 /*
   2  * Copyright (c) 1983 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static char sccsid[] = "@(#)game.c      5.4 (Berkeley) 6/1/90";
  36 #endif /* not lint */
  37
  38 #include "externs.h"
  39
  40 maxturns(ship, af)
  41 register struct ship *ship;
  42 char *af;
  43 {
  44         register int turns;
  45
  46         turns = ship->specs->ta;
  47         if (*af = (ship->file->drift > 1 && turns)) {
  48                 turns--;
  49                 if (ship->file->FS == 1)
  50                         turns = 0;
  51         }
  52         return turns;
  53 }
  54
  55 maxmove(ship, dir, fs)
  56 register struct ship *ship;
  57 int dir, fs;
  58 {
  59         register int riggone = 0, Move, flank = 0;
  60
  61         Move = ship->specs->bs;
  62         if (!ship->specs->rig1)
  63                 riggone++;
  64         if (!ship->specs->rig2)
  65                 riggone++;
  66         if (!ship->specs->rig3)
  67                 riggone++;
  68         if (!ship->specs->rig4)
  69                 riggone++;
  70         if ((ship->file->FS || fs) && fs != -1) {
  71                 flank = 1;
  72                 Move = ship->specs->fs;
  73         }
  74         if (dir == winddir)
  75                 Move -= 1 + WET[windspeed][ship->specs->class-1].B;
  76         else if (dir == winddir + 2 || dir == winddir - 2 || dir == winddir - 6 || dir == winddir + 6)
  77                 Move -= 1 + WET[windspeed][ship->specs->class-1].C;
  78         else if (dir == winddir + 3 || dir == winddir - 3 || dir == winddir - 5 || dir == winddir + 5)
  79                 Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
  80         else if (dir == winddir + 4 || dir == winddir - 4)
  81                 Move = 0;
  82         else
  83                 Move -= WET[windspeed][ship->specs->class-1].A;
  84         Move -= riggone;
  85         Move = Move < 0 ? 0 : Move;
  86         return(Move);
  87 }