battlestar/room.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[] = "from: @(#)room.c      5.3 (Berkeley) 6/1/90";*/
  36 static char rcsid[] = "$Id: room.c,v 1.2 1993/08/01 18:55:54 mycroft Exp $";
  37 #endif /* not lint */
  38
  39 #include "externs.h"
  40
  41 writedes()
  42 {
  43         int compass;
  44         register char *p;
  45         register c;
  46
  47         printf("\n\t%s\n", location[position].name);
  48         if (beenthere[position] < 3) {
  49                 compass = NORTH;
  50                 for (p = location[position].desc; c = *p++;)
  51                         if (c != '-' && c != '*' && c != '+')
  52                                 putchar(c);
  53                         else {
  54                                 if (c != '*')
  55                                         printf(truedirec(compass, c));
  56                                 compass++;
  57                         }
  58         }
  59 }
  60
  61 printobjs()
  62 {
  63         register unsigned int *p = location[position].objects;
  64         register n;
  65
  66         printf("\n");
  67         for (n = 0; n < NUMOFOBJECTS; n++)
  68                 if (testbit(p, n) && objdes[n])
  69                         puts(objdes[n]);
  70 }
  71
  72 whichway(here)
  73 struct room here;
  74 {
  75         switch(direction) {
  76
  77                 case NORTH:
  78                         left = here.west;
  79                         right = here.east;
  80                         ahead = here.north;
  81                         back = here.south;
  82                         break;
  83
  84                 case SOUTH:
  85                         left = here.east;
  86                         right = here.west;
  87                         ahead = here.south;
  88                         back = here.north;
  89                         break;
  90
  91                 case EAST:
  92                         left = here.north;
  93                         right = here.south;
  94                         ahead = here.east;
  95                         back = here.west;
  96                         break;
  97
  98                 case WEST:
  99                         left = here.south;
 100                         right = here.north;
 101                         ahead = here.west;
 102                         back = here.east;
 103                         break;
 104
 105         }
 106 }
 107
 108 char *
 109 truedirec(way, option)
 110 int way;
 111 char option;
 112 {
 113         switch(way) {
 114
 115                 case NORTH:
 116                         switch(direction) {
 117                                 case NORTH:
 118                                         return("ahead");
 119                                 case SOUTH:
 120                                         return(option == '+' ? "behind you" : "back");
 121                                 case EAST:
 122                                         return("left");
 123                                 case WEST:
 124                                         return("right");
 125                         }
 126
 127                 case SOUTH:
 128                         switch(direction) {
 129                                 case NORTH:
 130                                         return(option == '+' ? "behind you" : "back");
 131                                 case SOUTH:
 132                                         return("ahead");
 133                                 case EAST:
 134                                         return("right");
 135                                 case WEST:
 136                                         return("left");
 137                         }
 138
 139                 case EAST:
 140                         switch(direction) {
 141                                 case NORTH:
 142                                         return("right");
 143                                 case SOUTH:
 144                                         return("left");
 145                                 case EAST:
 146                                         return("ahead");
 147                                 case WEST:
 148                                         return(option == '+' ? "behind you" : "back");
 149                         }
 150
 151                 case WEST:
 152                         switch(direction) {
 153                                 case NORTH:
 154                                         return("left");
 155                                 case SOUTH:
 156                                         return("right");
 157                                 case EAST:
 158                                         return(option == '+' ? "behind you" : "back");
 159                                 case WEST:
 160                                         return("ahead");
 161                         }
 162
 163                 default:
 164                         printf("Error: room %d.  More than four directions wanted.", position);
 165                         return("!!");
 166       }
 167 }
 168
 169 newway(thisway)
 170 int thisway;
 171 {
 172         switch(direction){
 173
 174                 case NORTH:
 175                         switch(thisway){
 176                                 case LEFT:
 177                                         direction = WEST;
 178                                         break;
 179                                 case RIGHT:
 180                                         direction = EAST;
 181                                         break;
 182                                 case BACK:
 183                                         direction = SOUTH;
 184                                         break;
 185                         }
 186                         break;
 187                 case SOUTH:
 188                         switch(thisway){
 189                                 case LEFT:
 190                                         direction = EAST;
 191                                         break;
 192                                 case RIGHT:
 193                                         direction = WEST;
 194                                         break;
 195                                 case BACK:
 196                                         direction = NORTH;
 197                                         break;
 198                         }
 199                         break;
 200                 case EAST:
 201                         switch(thisway){
 202                                 case LEFT:
 203                                         direction = NORTH;
 204                                         break;
 205                                 case RIGHT:
 206                                         direction = SOUTH;
 207                                         break;
 208                                 case BACK:
 209                                         direction = WEST;
 210                                         break;
 211                         }
 212                         break;
 213                 case WEST:
 214                         switch(thisway){
 215                                 case LEFT:
 216                                         direction = SOUTH;
 217                                         break;
 218                                 case RIGHT:
 219                                         direction = NORTH;
 220                                         break;
 221                                 case BACK:
 222                                         direction = EAST;
 223                                         break;
 224                         }
 225                         break;
 226       }
 227 }