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 1.3 2006/08/08 16:47:20 pavalos Exp $
  36  */
  37
  38 #include "externs.h"
  39
  40 void
  41 writedes(void)
  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(void)
  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(struct room here)
  75 {
  76         switch(direction) {
  77
  78                 case NORTH:
  79                         left = here.west;
  80                         right = here.east;
  81                         ahead = here.north;
  82                         back = here.south;
  83                         break;
  84
  85                 case SOUTH:
  86                         left = here.east;
  87                         right = here.west;
  88                         ahead = here.south;
  89                         back = here.north;
  90                         break;
  91
  92                 case EAST:
  93                         left = here.north;
  94                         right = here.south;
  95                         ahead = here.east;
  96                         back = here.west;
  97                         break;
  98
  99                 case WEST:
 100                         left = here.south;
 101                         right = here.north;
 102                         ahead = here.west;
 103                         back = here.east;
 104                         break;
 105
 106         }
 107 }
 108
 109 const char *
 110 truedirec(int way, unsigned int option)
 111 {
 112         switch(way) {
 113
 114                 case NORTH:
 115                         switch(direction) {
 116                                 case NORTH:
 117                                         return("ahead");
 118                                 case SOUTH:
 119                                         return(option == '+' ? "behind you" : "back");
 120                                 case EAST:
 121                                         return("left");
 122                                 case WEST:
 123                                         return("right");
 124                         }
 125
 126                 case SOUTH:
 127                         switch(direction) {
 128                                 case NORTH:
 129                                         return(option == '+' ? "behind you" : "back");
 130                                 case SOUTH:
 131                                         return("ahead");
 132                                 case EAST:
 133                                         return("right");
 134                                 case WEST:
 135                                         return("left");
 136                         }
 137
 138                 case EAST:
 139                         switch(direction) {
 140                                 case NORTH:
 141                                         return("right");
 142                                 case SOUTH:
 143                                         return("left");
 144                                 case EAST:
 145                                         return("ahead");
 146                                 case WEST:
 147                                         return(option == '+' ? "behind you" : "back");
 148                         }
 149
 150                 case WEST:
 151                         switch(direction) {
 152                                 case NORTH:
 153                                         return("left");
 154                                 case SOUTH:
 155                                         return("right");
 156                                 case EAST:
 157                                         return(option == '+' ? "behind you" : "back");
 158                                 case WEST:
 159                                         return("ahead");
 160                         }
 161
 162                 default:
 163                         printf("Error: room %d.  More than four directions wanted.", position);
 164                         return("!!");
 165       }
 166 }
 167
 168 void
 169 newway(int thisway)
 170 {
 171         switch(direction){
 172
 173                 case NORTH:
 174                         switch(thisway){
 175                                 case LEFT:
 176                                         direction = WEST;
 177                                         break;
 178                                 case RIGHT:
 179                                         direction = EAST;
 180                                         break;
 181                                 case BACK:
 182                                         direction = SOUTH;
 183                                         break;
 184                         }
 185                         break;
 186                 case SOUTH:
 187                         switch(thisway){
 188                                 case LEFT:
 189                                         direction = EAST;
 190                                         break;
 191                                 case RIGHT:
 192                                         direction = WEST;
 193                                         break;
 194                                 case BACK:
 195                                         direction = NORTH;
 196                                         break;
 197                         }
 198                         break;
 199                 case EAST:
 200                         switch(thisway){
 201                                 case LEFT:
 202                                         direction = NORTH;
 203                                         break;
 204                                 case RIGHT:
 205                                         direction = SOUTH;
 206                                         break;
 207                                 case BACK:
 208                                         direction = WEST;
 209                                         break;
 210                         }
 211                         break;
 212                 case WEST:
 213                         switch(thisway){
 214                                 case LEFT:
 215                                         direction = SOUTH;
 216                                         break;
 217                                 case RIGHT:
 218                                         direction = NORTH;
 219                                         break;
 220                                 case BACK:
 221                                         direction = EAST;
 222                                         break;
 223                         }
 224                         break;
 225       }
 226 }