386BSD 0.1 development

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

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)room.c      5.3 (Berkeley) 6/1/90";
#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;
     }
}