BSD 4_3_Tahoe release

[unix-history] / usr / src / games / battlestar / room.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
static char sccsid[] = "@(#)room.c      5.2 (Berkeley) 6/19/88";
#endif /* not lint */

#include "externs.h"

writedes()
{
       int compass;
       register char *p;
       register c;

       printf("\n\t%s\n", location[position].name);
       if (beenthere[position] < 3) {
               compass = NORTH;
               for (p = location[position].desc; c = *p++;)
                       if (c != '-' && c != '*' && c != '+')
                               putchar(c);
                       else {
                               if (c != '*')
                                       printf(truedirec(compass, c));
                               compass++;
                       }
       }
}

printobjs()
{
       register unsigned int *p = location[position].objects;
       register n;

       printf("\n");
       for (n = 0; n < NUMOFOBJECTS; n++)
               if (testbit(p, n) && objdes[n])
                       puts(objdes[n]);
}

whichway(here)
struct room here;
{
       switch(direction) {

               case NORTH:
                       left = here.west;
                       right = here.east;
                       ahead = here.north;
                       back = here.south;
                       break;
               
               case SOUTH:
                       left = here.east;
                       right = here.west;
                       ahead = here.south;
                       back = here.north;
                       break;

               case EAST:
                       left = here.north;
                       right = here.south;
                       ahead = here.east;
                       back = here.west;
                       break;

               case WEST:
                       left = here.south;
                       right = here.north;
                       ahead = here.west;
                       back = here.east;
                       break;

       }
}

char *
truedirec(way, option)
int way;
char option;
{
       switch(way) {

               case NORTH:
                       switch(direction) {
                               case NORTH:
                                       return("ahead");
                               case SOUTH:
                                       return(option == '+' ? "behind you" : "back");
                               case EAST:
                                       return("left");
                               case WEST:
                                       return("right");
                       }

               case SOUTH:
                       switch(direction) {
                               case NORTH:
                                       return(option == '+' ? "behind you" : "back");
                               case SOUTH:
                                       return("ahead");
                               case EAST:
                                       return("right");
                               case WEST:
                                       return("left");
                       }

               case EAST:
                       switch(direction) {
                               case NORTH:
                                       return("right");
                               case SOUTH:
                                       return("left");
                               case EAST:
                                       return("ahead");
                               case WEST:      
                                       return(option == '+' ? "behind you" : "back");
                       }

               case WEST:
                       switch(direction) {
                               case NORTH:
                                       return("left");
                               case SOUTH:
                                       return("right");
                               case EAST:
                                       return(option == '+' ? "behind you" : "back");
                               case WEST:
                                       return("ahead");
                       }

               default:
                       printf("Error: room %d.  More than four directions wanted.", position);
                       return("!!");
     }
}

newway(thisway)
int thisway;
{
       switch(direction){

               case NORTH:
                       switch(thisway){
                               case LEFT:
                                       direction = WEST;
                                       break;
                               case RIGHT:
                                       direction = EAST;
                                       break;
                               case BACK:
                                       direction = SOUTH;
                                       break;
                       }
                       break;
               case SOUTH:
                       switch(thisway){
                               case LEFT:
                                       direction = EAST;
                                       break;
                               case RIGHT:
                                       direction = WEST;
                                       break;
                               case BACK:
                                       direction = NORTH;
                                       break;
                       }
                       break;
               case EAST:
                       switch(thisway){
                               case LEFT:
                                       direction = NORTH;
                                       break;
                               case RIGHT:
                                       direction = SOUTH;
                                       break;
                               case BACK:
                                       direction = WEST;
                                       break;
                       }
                       break;
               case WEST:
                       switch(thisway){
                               case LEFT:
                                       direction = SOUTH;
                                       break;
                               case RIGHT:
                                       direction = NORTH;
                                       break;
                               case BACK:
                                       direction = EAST;
                                       break;
                       }
                       break;
     }
}