games/battlestar/room.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  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  * @(#)room.c   8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/battlestar/room.c,v 1.7.2.2 2001/03/05 11:45:36 kris Exp $
  35  * $DragonFly: src/games/battlestar/room.c,v 1.2 2003/06/17 04:25:23 dillon Exp $
  36  */
  37
  38 #include "externs.h"
  39
  40 void
  41 writedes()
  42 {
  43         int compass;
  44         const char *p;
  45         unsigned int 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((int)c);
  53                         else {
  54                                 if (c != '*')
  55                                         printf("%s", truedirec(compass, c));
  56                                 compass++;
  57                         }
  58         }
  59 }
  60
  61 void
  62 printobjs()
  63 {
  64         unsigned int *p = location[position].objects;
  65         int n;
  66
  67         printf("\n");
  68         for (n = 0; n < NUMOFOBJECTS; n++)
  69                 if (testbit(p, n) && objdes[n])
  70                         puts(objdes[n]);
  71 }
  72
  73 void
  74 whichway(here)
  75 struct room here;
  76 {
  77         switch(direction) {
  78
  79                 case NORTH:
  80                         left = here.west;
  81                         right = here.east;
  82                         ahead = here.north;
  83                         back = here.south;
  84                         break;
  85
  86                 case SOUTH:
  87                         left = here.east;
  88                         right = here.west;
  89                         ahead = here.south;
  90                         back = here.north;
  91                         break;
  92
  93                 case EAST:
  94                         left = here.north;
  95                         right = here.south;
  96                         ahead = here.east;
  97                         back = here.west;
  98                         break;
  99
 100                 case WEST:
 101                         left = here.south;
 102                         right = here.north;
 103                         ahead = here.west;
 104                         back = here.east;
 105                         break;
 106
 107         }
 108 }
 109
 110 const char *
 111 truedirec(way, option)
 112 int way;
 113 unsigned int option;
 114 {
 115         switch(way) {
 116
 117                 case NORTH:
 118                         switch(direction) {
 119                                 case NORTH:
 120                                         return("ahead");
 121                                 case SOUTH:
 122                                         return(option == '+' ? "behind you" : "back");
 123                                 case EAST:
 124                                         return("left");
 125                                 case WEST:
 126                                         return("right");
 127                         }
 128
 129                 case SOUTH:
 130                         switch(direction) {
 131                                 case NORTH:
 132                                         return(option == '+' ? "behind you" : "back");
 133                                 case SOUTH:
 134                                         return("ahead");
 135                                 case EAST:
 136                                         return("right");
 137                                 case WEST:
 138                                         return("left");
 139                         }
 140
 141                 case EAST:
 142                         switch(direction) {
 143                                 case NORTH:
 144                                         return("right");
 145                                 case SOUTH:
 146                                         return("left");
 147                                 case EAST:
 148                                         return("ahead");
 149                                 case WEST:
 150                                         return(option == '+' ? "behind you" : "back");
 151                         }
 152
 153                 case WEST:
 154                         switch(direction) {
 155                                 case NORTH:
 156                                         return("left");
 157                                 case SOUTH:
 158                                         return("right");
 159                                 case EAST:
 160                                         return(option == '+' ? "behind you" : "back");
 161                                 case WEST:
 162                                         return("ahead");
 163                         }
 164
 165                 default:
 166                         printf("Error: room %d.  More than four directions wanted.", position);
 167                         return("!!");
 168       }
 169 }
 170
 171 void
 172 newway(thisway)
 173 int thisway;
 174 {
 175         switch(direction){
 176
 177                 case NORTH:
 178                         switch(thisway){
 179                                 case LEFT:
 180                                         direction = WEST;
 181                                         break;
 182                                 case RIGHT:
 183                                         direction = EAST;
 184                                         break;
 185                                 case BACK:
 186                                         direction = SOUTH;
 187                                         break;
 188                         }
 189                         break;
 190                 case SOUTH:
 191                         switch(thisway){
 192                                 case LEFT:
 193                                         direction = EAST;
 194                                         break;
 195                                 case RIGHT:
 196                                         direction = WEST;
 197                                         break;
 198                                 case BACK:
 199                                         direction = NORTH;
 200                                         break;
 201                         }
 202                         break;
 203                 case EAST:
 204                         switch(thisway){
 205                                 case LEFT:
 206                                         direction = NORTH;
 207                                         break;
 208                                 case RIGHT:
 209                                         direction = SOUTH;
 210                                         break;
 211                                 case BACK:
 212                                         direction = WEST;
 213                                         break;
 214                         }
 215                         break;
 216                 case WEST:
 217                         switch(thisway){
 218                                 case LEFT:
 219                                         direction = SOUTH;
 220                                         break;
 221                                 case RIGHT:
 222                                         direction = NORTH;
 223                                         break;
 224                                 case BACK:
 225                                         direction = EAST;
 226                                         break;
 227                         }
 228                         break;
 229       }
 230 }