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[unix-history] / usr / src / games / sail / game.c

#ifndef lint
static  char *sccsid = "@(#)game.c      2.1 83/10/31";
#endif

#include "externs.h"

maxturns(ship, af)
register struct ship *ship;
char *af;
{
       register int turns;

       turns = ship->specs->ta;
       if (*af = (ship->file->drift > 1 && turns)) {
               turns--;
               if (ship->file->FS == 1)
                       turns = 0;
       }
       return turns;
}

maxmove(ship, dir, fs)
register struct ship *ship;
int dir, fs;
{
       register int riggone = 0, Move, flank = 0;

       Move = ship->specs->bs;
       if (!ship->specs->rig1)
               riggone++;
       if (!ship->specs->rig2)
               riggone++;
       if (!ship->specs->rig3)
               riggone++;
       if (!ship->specs->rig4)
               riggone++;
       if ((ship->file->FS || fs) && fs != -1) {
               flank = 1;
               Move = ship->specs->fs;
       }
       if (dir == winddir)
               Move -= 1 + WET[windspeed][ship->specs->class-1].B;
       else if (dir == winddir + 2 || dir == winddir - 2 || dir == winddir - 6 || dir == winddir + 6)
               Move -= 1 + WET[windspeed][ship->specs->class-1].C;
       else if (dir == winddir + 3 || dir == winddir - 3 || dir == winddir - 5 || dir == winddir + 5)
               Move = (flank ? 2 : 1) - WET[windspeed][ship->specs->class-1].D;
       else if (dir == winddir + 4 || dir == winddir - 4)
               Move = 0;
       else 
               Move -= WET[windspeed][ship->specs->class-1].A;
       Move -= riggone;
       Move = Move < 0 ? 0 : Move;
       return(Move);
}