mdw@git.distorted.org.uk Git - xor/blob - xor.h

   1 /* -*-c-*-
   2  *
   3  * $Id$
   4  *
   5  * Main header for XOR
   6  *
   7  * (c) 2003 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of XOR.
  13  *
  14  * XOR is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * XOR is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with XOR; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 #ifndef XOR_H
  30 #define XOR_H
  31
  32 #ifdef __cplusplus
  33   extern "C" {
  34 #endif
  35
  36 /*----- Header files ------------------------------------------------------*/
  37
  38 #include "config.h"
  39
  40 #include <ctype.h>
  41 #include <limits.h>
  42 #include <stdio.h>
  43 #include <string.h>
  44
  45 #include <unistd.h>
  46
  47 #include <mLib/alloc.h>
  48 #include <mLib/darray.h>
  49 #include <mLib/dstr.h>
  50 #include <mLib/str.h>
  51 #include <mLib/sub.h>
  52
  53 /*----- Data structures ---------------------------------------------------*/
  54
  55 typedef struct level {
  56   int w, h;                             /* Width and height, in cells */
  57   char *name;                           /* Level name */
  58   unsigned f;                           /* Various flags */
  59   int m, mtot;                          /* Masks collected, and total */
  60   int v, vtot;                          /* Moves made, and allowed */
  61   int *d;                               /* Level data, row-major order */
  62 } level;
  63
  64 #define LF_NWMAP 1u                     /* North-west map collected */
  65 #define LF_NEMAP 2u                     /* North-east map collected */
  66 #define LF_SWMAP 4u                     /* South-west map collected */
  67 #define LF_SEMAP 8u                     /* South-east map collected */
  68 #define LF_DARK 16u                     /* Someone turned the lights out */
  69
  70 #define LF_MAP "1234D"                  /* Map bits to characters */
  71
  72 /* --- Cells and their meanings --- */
  73
  74 #define C_PLAYER        '$'             /* Active player */
  75 #define C_SPARE         '%'             /* Inactive player */
  76 #define C_WALL          '#'             /* Solid wall */
  77 #define C_EXIT          '*'             /* Exit door */
  78 #define C_EMPTY         ' '             /* Empty space */
  79 #define C_MASK          '+'             /* Mask */
  80 #define C_NWMAP         '1'             /* North-west map segment */
  81 #define C_NEMAP         '2'             /* North-east map segment */
  82 #define C_SWMAP         '3'             /* South-west map segment */
  83 #define C_SEMAP         '4'             /* South-east map segment */
  84 #define C_UKMAP         'M'             /* Unknown map segment */
  85 #define C_DOT           '-'             /* Dots -- horizontal force-field */
  86 #define C_WAVE          '|'             /* Waves -- vertical force-field */
  87 #define C_CHICKEN       '<'             /* Chicken -- moves left */
  88 #define C_FISH          'V'             /* Fish -- moves downwards */
  89 #define C_HBOMB         'C'             /* H-bomb -- moves like chicken */
  90 #define C_VBOMB         'U'             /* V-bomb -- moves like fish */
  91 #define C_DOLLY         '@'             /* Dolly -- slides about */
  92 #define C_SWITCH        '~'             /* Light-switch mask */
  93 #define C_BMUS          'O'             /* Teleport pad */
  94
  95 /* --- Celll flags --- */
  96
  97 #define CF_CELLMASK 255u                /* Mask for cell type */
  98 #define CF_INFLIGHT 256u                /* Object is currently moving */
  99 #define CF_DOLLYUP 0u                   /* Dolly moving up */
 100 #define CF_DOLLYDOWN 512u               /* Dolly moving down */
 101 #define CF_DOLLYLEFT 1024u              /* Dolly moving left */
 102 #define CF_DOLLYRIGHT 1536u             /* Dolly moving right */
 103 #define CF_DOLLYMASK 1536u              /* Mask for dolly movement */
 104
 105 /* --- Macros for accessing the map data --- */
 106
 107 #define CELLREF(l, x, y)                                                \
 108   ((l)->d[(x) + (y) * (l)->w])
 109
 110 #define CELLOK(l, x, y)                                                 \
 111   ((x) >= 0 && (x) < (l)->w && (y) >= 0 && (y) < (l)->h)
 112
 113 #define CELLSET(l, x, y, c)                                             \
 114   (CELLOK((l), (x), (y)) ?                                              \
 115      CELLREF((l), (x), (y)) = (c), (void)0 :                            \
 116      (void)0)
 117
 118 #define CELL(l, x, y)                                                   \
 119   (CELLOK((l), (x), (y)) ?                                              \
 120      CELLREF((l), (x), (y)) :                                           \
 121      C_WALL)
 122
 123 #define CELLSETFL(l, x, y, f)                                           \
 124   (CELLOK((l), (x), (y)) ?                                              \
 125      CELLREF((l), (x), (y)) |= (f), (void)0 :                           \
 126      (void)0)
 127
 128 #define CELLCLRFL(l, x, y, f)                                           \
 129   (CELLOK((l), (x), (y)) ?                                              \
 130      CELLREF((l), (x), (y)) &= ~(f), (void)0 :                          \
 131      (void)0)
 132
 133 /* --- UI information --- *
 134  *
 135  * This is private to the UI layer.
 136  */
 137
 138 typedef struct ui_state ui_state;
 139
 140 /* --- Player structure --- */
 141
 142 typedef struct game_player {
 143   struct game_player *next, *prev;      /* Link in list (forward only) */
 144   int x, y;                             /* Current position */
 145   unsigned f;                           /* Flags */
 146   ui_state *u;                          /* User interface state */
 147 } game_player;
 148
 149 #define PF_DEAD 1u                      /* Player has been killed */
 150
 151 /* --- Undo structures --- */
 152
 153 typedef struct undo_action {
 154   struct undo_action *next;             /* Next action in chian */
 155   int type;                             /* What kind of thing happened */
 156   union {
 157     struct { int x, y, c; } c;          /* Cell change */
 158     game_player *p;                     /* Player */
 159     unsigned f;                         /* Flags to restore */
 160     int n;                              /* Counter to restore */
 161   } u;
 162 } undo_action;
 163
 164 enum {
 165   A_CELL,                               /* Cell changed contents */
 166   A_DIE,                                /* Player died */
 167   A_LIVE,                               /* Player became alive */
 168   A_LEVEL,                              /* Level flags changed */
 169   A_MASK,                               /* Mask count changed */
 170   A_MOVE,                               /* Player moved */
 171   A_SWITCH,                             /* Switch to other player */
 172   A_END
 173 };
 174
 175 typedef struct undo_move {
 176   struct undo_move *next;
 177   undo_action *act;
 178 } undo_move;
 179
 180 /* --- Game state --- */
 181
 182 typedef struct game_state {
 183   struct level *l;                      /* Level information */
 184   game_player *p, *ptail;               /* Player list */
 185   unsigned f;                           /* Various flags */
 186   undo_move *u, *r, *m;                 /* Undo, redo and current lists */
 187 } game_state;
 188
 189 #define GF_QUIT 1u
 190 #define GF_WIN 2u
 191
 192 /* --- The cell attributes table --- */
 193
 194 typedef struct cellinfo {
 195   int c;                                /* Cell type */
 196   unsigned f;                           /* Various flags */
 197
 198   void (*hit)(game_state *, int /*x*/, int /*y*/, int /*hx*/, int /*hy*/);
 199   /* Object at @(x, y)@ has been struck by another object (e.g., a chicken)
 200      which is now at @(hx, hy)@.  */
 201
 202   int (*nudge)(game_state *, int /*x*/, int /*y*/, int /*dx*/, int /*dy*/);
 203   /* Object is being nudged by player in given direction.  Answer @0@ if
 204      nothing happens (and the player cannot enter), @1@ if it's OK and the
 205      space is vacated, or @-1@ if something strange happened.  */
 206
 207   int (*moveh)(game_state *, int /*x*/, int /*y*/);
 208   int (*movev)(game_state *, int /*x*/, int /*y*/);
 209   /* See if object can move on its own horizontally or vertically.  Return
 210    * zero if it won't move, or nonzero otherwise.  */
 211 } cellinfo;
 212
 213 #define CF_HIDE 1u                      /* Invisible in the dark */
 214 #define CF_MASK 2u                      /* Must collect these */
 215 #define CF_HPASS 4u                     /* Object is passable horizontally */
 216 #define CF_VPASS 8u                     /* Object is passable vertically */
 217 #define CF_PLAYER 16u                   /* Object is a player */
 218 #define CF_MAP 32u                      /* Object shows up on map */
 219
 220 /* --- Other structures --- */
 221
 222 typedef struct point { int x, y; } point;
 223
 224 /*----- Global variables --------------------------------------------------*/
 225
 226 extern const cellinfo *cellmap[];
 227
 228 /*----- Cell attributes ---------------------------------------------------*/
 229
 230 extern void cellinfo_init(void);
 231
 232 /*----- Level management --------------------------------------------------*/
 233
 234 extern int lev_findnext(const level */*l*/, int /*c*/,
 235                         int */*x*/, int */*y*/);
 236 extern int lev_findcell(const level */*l*/, int /*c*/,
 237                         int */*x*/, int */*y*/);
 238 extern level *lev_read(FILE */*fp*/);
 239 extern void lev_write(const level */*l*/, FILE */*fp*/);
 240 extern void lev_free(level */*l*/);
 241 extern level *lev_copy(const level */*l*/);
 242
 243 /*----- User interface ----------------------------------------------------*/
 244
 245 extern void ui_frame(ui_state */*u*/);
 246 extern void ui_message(ui_state */*u*/, const char */*p*/);
 247 extern void ui_explode(ui_state */*u*/, const point */*pt*/, int /*n*/);
 248 extern void ui_track(ui_state */*u*/, int /*x*/, int /*y*/);
 249 extern void ui_update(ui_state */*u*/);
 250 extern void ui_switch(ui_state */*u*/);
 251 extern void ui_init(void);
 252 extern void ui_update(ui_state */*u*/);
 253 extern ui_state *ui_start(level */*l*/, int /*x*/, int /*y*/);
 254 extern void ui_go(game_state */*g*/, ui_state */*u*/);
 255 extern void ui_destroy(ui_state */*u*/);
 256 extern void ui_exit(void);
 257
 258 /*----- Undo management ---------------------------------------------------*/
 259
 260 extern void undo_init(game_state */*g*/);
 261 extern void undo_begin(game_state */*g*/);
 262 extern void undo_cell(game_state */*g*/, int /*x*/, int /*y*/, int /*c*/);
 263 extern void undo_die(game_state */*g*/, game_player */*p*/);
 264 extern void undo_pmove(game_state */*g*/);
 265 extern void undo_levelf(game_state */*g*/);
 266 extern void undo_mask(game_state */*g*/);
 267 extern void undo_switch(game_state */*g*/);
 268 extern void undo_commit(game_state */*g*/);
 269 extern void undo(game_state */*g*/);
 270 extern void redo(game_state */*g*/);
 271 extern void undo_free(game_state */*g*/);
 272
 273 /*----- Game engine -------------------------------------------------------*/
 274
 275 extern void game_explode(game_state */*g*/, const point */*pt*/, int /*n*/);
 276 extern void game_die(game_state */*g*/, int /*x*/, int /*y*/);
 277 extern void game_moveobj(game_state */*g*/, int /*x*/, int /*y*/,
 278                          int /*xx*/, int /*yy*/);
 279 extern void game_switchto(game_state *g, game_player */*p*/);
 280 extern int game_switch(game_state */*g*/);
 281 extern void game_move(game_state */*g*/, int /*dx*/, int /*dy*/);
 282 extern void game_go(level */*l*/);
 283 extern void game_quit(game_state */*g*/);
 284
 285 /*----- That's all, folks -------------------------------------------------*/
 286
 287 #ifdef __cplusplus
 288   }
 289 #endif
 290
 291 #endif