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
  34 #ifndef lint
  35 #if 0
  36 static char sccsid[] = "@(#)room.c      8.1 (Berkeley) 5/31/93";
  37 #endif
  38 static const char rcsid[] =
  39  "$FreeBSD: src/games/battlestar/room.c,v 1.7.2.2 2001/03/05 11:45:36 kris Exp $";
  40 #endif /* not lint */
  41
  42 #include "externs.h"
  43
  44 void
  45 writedes()
  46 {
  47         int compass;
  48         const char *p;
  49         unsigned int c;
  50
  51         printf("\n\t%s\n", location[position].name);
  52         if (beenthere[position] < 3) {
  53                 compass = NORTH;
  54                 for ((p = location[position].desc); (c = *p++);)
  55                         if (c != '-' && c != '*' && c != '+')
  56                                 putchar((int)c);
  57                         else {
  58                                 if (c != '*')
  59                                         printf("%s", truedirec(compass, c));
  60                                 compass++;
  61                         }
  62         }
  63 }
  64
  65 void
  66 printobjs()
  67 {
  68         unsigned int *p = location[position].objects;
  69         int n;
  70
  71         printf("\n");
  72         for (n = 0; n < NUMOFOBJECTS; n++)
  73                 if (testbit(p, n) && objdes[n])
  74                         puts(objdes[n]);
  75 }
  76
  77 void
  78 whichway(here)
  79 struct room here;
  80 {
  81         switch(direction) {
  82
  83                 case NORTH:
  84                         left = here.west;
  85                         right = here.east;
  86                         ahead = here.north;
  87                         back = here.south;
  88                         break;
  89
  90                 case SOUTH:
  91                         left = here.east;
  92                         right = here.west;
  93                         ahead = here.south;
  94                         back = here.north;
  95                         break;
  96
  97                 case EAST:
  98                         left = here.north;
  99                         right = here.south;
 100                         ahead = here.east;
 101                         back = here.west;
 102                         break;
 103
 104                 case WEST:
 105                         left = here.south;
 106                         right = here.north;
 107                         ahead = here.west;
 108                         back = here.east;
 109                         break;
 110
 111         }
 112 }
 113
 114 const char *
 115 truedirec(way, option)
 116 int way;
 117 unsigned int option;
 118 {
 119         switch(way) {
 120
 121                 case NORTH:
 122                         switch(direction) {
 123                                 case NORTH:
 124                                         return("ahead");
 125                                 case SOUTH:
 126                                         return(option == '+' ? "behind you" : "back");
 127                                 case EAST:
 128                                         return("left");
 129                                 case WEST:
 130                                         return("right");
 131                         }
 132
 133                 case SOUTH:
 134                         switch(direction) {
 135                                 case NORTH:
 136                                         return(option == '+' ? "behind you" : "back");
 137                                 case SOUTH:
 138                                         return("ahead");
 139                                 case EAST:
 140                                         return("right");
 141                                 case WEST:
 142                                         return("left");
 143                         }
 144
 145                 case EAST:
 146                         switch(direction) {
 147                                 case NORTH:
 148                                         return("right");
 149                                 case SOUTH:
 150                                         return("left");
 151                                 case EAST:
 152                                         return("ahead");
 153                                 case WEST:
 154                                         return(option == '+' ? "behind you" : "back");
 155                         }
 156
 157                 case WEST:
 158                         switch(direction) {
 159                                 case NORTH:
 160                                         return("left");
 161                                 case SOUTH:
 162                                         return("right");
 163                                 case EAST:
 164                                         return(option == '+' ? "behind you" : "back");
 165                                 case WEST:
 166                                         return("ahead");
 167                         }
 168
 169                 default:
 170                         printf("Error: room %d.  More than four directions wanted.", position);
 171                         return("!!");
 172       }
 173 }
 174
 175 void
 176 newway(thisway)
 177 int thisway;
 178 {
 179         switch(direction){
 180
 181                 case NORTH:
 182                         switch(thisway){
 183                                 case LEFT:
 184                                         direction = WEST;
 185                                         break;
 186                                 case RIGHT:
 187                                         direction = EAST;
 188                                         break;
 189                                 case BACK:
 190                                         direction = SOUTH;
 191                                         break;
 192                         }
 193                         break;
 194                 case SOUTH:
 195                         switch(thisway){
 196                                 case LEFT:
 197                                         direction = EAST;
 198                                         break;
 199                                 case RIGHT:
 200                                         direction = WEST;
 201                                         break;
 202                                 case BACK:
 203                                         direction = NORTH;
 204                                         break;
 205                         }
 206                         break;
 207                 case EAST:
 208                         switch(thisway){
 209                                 case LEFT:
 210                                         direction = NORTH;
 211                                         break;
 212                                 case RIGHT:
 213                                         direction = SOUTH;
 214                                         break;
 215                                 case BACK:
 216                                         direction = WEST;
 217                                         break;
 218                         }
 219                         break;
 220                 case WEST:
 221                         switch(thisway){
 222                                 case LEFT:
 223                                         direction = SOUTH;
 224                                         break;
 225                                 case RIGHT:
 226                                         direction = NORTH;
 227                                         break;
 228                                 case BACK:
 229                                         direction = EAST;
 230                                         break;
 231                         }
 232                         break;
 233       }
 234 }