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

   1 /*
   2  * puzzles.h: header file for my puzzle collection
   3  */
   4
   5 #ifndef PUZZLES_PUZZLES_H
   6 #define PUZZLES_PUZZLES_H
   7
   8 #include <stdlib.h> /* for size_t */
   9
  10 #ifndef TRUE
  11 #define TRUE 1
  12 #endif
  13 #ifndef FALSE
  14 #define FALSE 0
  15 #endif
  16
  17 #define PI 3.141592653589793238462643383279502884197169399
  18
  19 #define lenof(array) ( sizeof(array) / sizeof(*(array)) )
  20
  21 #define STR_INT(x) #x
  22 #define STR(x) STR_INT(x)
  23
  24 /* NB not perfect because they evaluate arguments multiple times. */
  25 #ifndef max
  26 #define max(x,y) ( (x)>(y) ? (x) : (y) )
  27 #endif /* max */
  28 #ifndef min
  29 #define min(x,y) ( (x)<(y) ? (x) : (y) )
  30 #endif /* min */
  31
  32 enum {
  33     LEFT_BUTTON = 0x0200,
  34     MIDDLE_BUTTON,
  35     RIGHT_BUTTON,
  36     LEFT_DRAG,
  37     MIDDLE_DRAG,
  38     RIGHT_DRAG,
  39     LEFT_RELEASE,
  40     MIDDLE_RELEASE,
  41     RIGHT_RELEASE,
  42     CURSOR_UP,
  43     CURSOR_DOWN,
  44     CURSOR_LEFT,
  45     CURSOR_RIGHT,
  46     CURSOR_SELECT,
  47
  48     /* made smaller because of 'limited range of datatype' errors. */
  49     MOD_CTRL       = 0x1000,
  50     MOD_SHFT       = 0x2000,
  51     MOD_NUM_KEYPAD = 0x4000,
  52     MOD_MASK       = 0x7000 /* mask for all modifiers */
  53 };
  54
  55 #define IS_MOUSE_DOWN(m) ( (unsigned)((m) - LEFT_BUTTON) <= \
  56                                (unsigned)(RIGHT_BUTTON - LEFT_BUTTON))
  57 #define IS_MOUSE_DRAG(m) ( (unsigned)((m) - LEFT_DRAG) <= \
  58                                (unsigned)(RIGHT_DRAG - LEFT_DRAG))
  59 #define IS_MOUSE_RELEASE(m) ( (unsigned)((m) - LEFT_RELEASE) <= \
  60                                (unsigned)(RIGHT_RELEASE - LEFT_RELEASE))
  61
  62 /* Bit flags indicating mouse button priorities */
  63 #define BUTTON_BEATS(x,y) ( 1 << (((x)-LEFT_BUTTON)*3+(y)-LEFT_BUTTON) )
  64
  65 /* Another random flag that goes in the mouse priorities section for want
  66  * of a better place to put it */
  67 #define SOLVE_ANIMATES ( 1 << 9 )
  68
  69 #define IGNOREARG(x) ( (x) = (x) )
  70
  71 typedef struct frontend frontend;
  72 typedef struct config_item config_item;
  73 typedef struct midend_data midend_data;
  74 typedef struct random_state random_state;
  75 typedef struct game_params game_params;
  76 typedef struct game_state game_state;
  77 typedef struct game_ui game_ui;
  78 typedef struct game_drawstate game_drawstate;
  79 typedef struct game game;
  80 typedef struct blitter blitter;
  81
  82 #define ALIGN_VNORMAL 0x000
  83 #define ALIGN_VCENTRE 0x100
  84
  85 #define ALIGN_HLEFT   0x000
  86 #define ALIGN_HCENTRE 0x001
  87 #define ALIGN_HRIGHT  0x002
  88
  89 #define FONT_FIXED    0
  90 #define FONT_VARIABLE 1
  91
  92 /*
  93  * Structure used to pass configuration data between frontend and
  94  * game
  95  */
  96 enum { C_STRING, C_CHOICES, C_BOOLEAN, C_END };
  97 struct config_item {
  98     /*
  99      * `name' is never dynamically allocated.
 100      */
 101     char *name;
 102     /*
 103      * `type' contains one of the above values.
 104      */
 105     int type;
 106     /*
 107      * For C_STRING, `sval' is always dynamically allocated and
 108      * non-NULL. For C_BOOLEAN and C_END, `sval' is always NULL.
 109      * For C_CHOICES, `sval' is non-NULL, _not_ dynamically
 110      * allocated, and contains a set of option strings separated by
 111      * a delimiter. The delimeter is also the first character in
 112      * the string, so for example ":Foo:Bar:Baz" gives three
 113      * options `Foo', `Bar' and `Baz'.
 114      */
 115     char *sval;
 116     /*
 117      * For C_BOOLEAN, this is TRUE or FALSE. For C_CHOICES, it
 118      * indicates the chosen index from the `sval' list. In the
 119      * above example, 0==Foo, 1==Bar and 2==Baz.
 120      */
 121     int ival;
 122 };
 123
 124 /*
 125  * Platform routines
 126  */
 127
 128 /* We can't use #ifdef DEBUG, because Cygwin defines it by default. */
 129 #ifdef DEBUGGING
 130 #define debug(x) (debug_printf x)
 131 void debug_printf(char *fmt, ...);
 132 #else
 133 #define debug(x)
 134 #endif
 135
 136 void fatal(char *fmt, ...);
 137 void frontend_default_colour(frontend *fe, float *output);
 138 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 139                int align, int colour, char *text);
 140 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour);
 141 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour);
 142 void draw_polygon(frontend *fe, int *coords, int npoints,
 143                   int fillcolour, int outlinecolour);
 144 void draw_circle(frontend *fe, int cx, int cy, int radius,
 145                  int fillcolour, int outlinecolour);
 146 void clip(frontend *fe, int x, int y, int w, int h);
 147 void unclip(frontend *fe);
 148 void start_draw(frontend *fe);
 149 void draw_update(frontend *fe, int x, int y, int w, int h);
 150 void end_draw(frontend *fe);
 151 void deactivate_timer(frontend *fe);
 152 void activate_timer(frontend *fe);
 153 void status_bar(frontend *fe, char *text);
 154 void get_random_seed(void **randseed, int *randseedsize);
 155
 156 blitter *blitter_new(int w, int h);
 157 void blitter_free(blitter *bl);
 158 /* save puts the portion of the current display with top-left corner
 159  * (x,y) to the blitter. load puts it back again to the specified
 160  * coords, or else wherever it was saved from
 161  * (if x = y = BLITTER_FROMSAVED). */
 162 void blitter_save(frontend *fe, blitter *bl, int x, int y);
 163 #define BLITTER_FROMSAVED (-1)
 164 void blitter_load(frontend *fe, blitter *bl, int x, int y);
 165
 166 /*
 167  * midend.c
 168  */
 169 midend_data *midend_new(frontend *fe, const game *ourgame);
 170 void midend_free(midend_data *me);
 171 void midend_set_params(midend_data *me, game_params *params);
 172 void midend_size(midend_data *me, int *x, int *y, int expand);
 173 void midend_new_game(midend_data *me);
 174 void midend_restart_game(midend_data *me);
 175 void midend_stop_anim(midend_data *me);
 176 int midend_process_key(midend_data *me, int x, int y, int button);
 177 void midend_force_redraw(midend_data *me);
 178 void midend_redraw(midend_data *me);
 179 float *midend_colours(midend_data *me, int *ncolours);
 180 void midend_timer(midend_data *me, float tplus);
 181 int midend_num_presets(midend_data *me);
 182 void midend_fetch_preset(midend_data *me, int n,
 183                          char **name, game_params **params);
 184 int midend_wants_statusbar(midend_data *me);
 185 enum { CFG_SETTINGS, CFG_SEED, CFG_DESC };
 186 config_item *midend_get_config(midend_data *me, int which, char **wintitle);
 187 char *midend_set_config(midend_data *me, int which, config_item *cfg);
 188 char *midend_game_id(midend_data *me, char *id);
 189 char *midend_text_format(midend_data *me);
 190 char *midend_solve(midend_data *me);
 191 void midend_supersede_game_desc(midend_data *me, char *desc, char *privdesc);
 192 char *midend_rewrite_statusbar(midend_data *me, char *text);
 193 void midend_serialise(midend_data *me,
 194                       void (*write)(void *ctx, void *buf, int len),
 195                       void *wctx);
 196 char *midend_deserialise(midend_data *me,
 197                          int (*read)(void *ctx, void *buf, int len),
 198                          void *rctx);
 199
 200 /*
 201  * malloc.c
 202  */
 203 void *smalloc(size_t size);
 204 void *srealloc(void *p, size_t size);
 205 void sfree(void *p);
 206 char *dupstr(const char *s);
 207 #define snew(type) \
 208     ( (type *) smalloc (sizeof (type)) )
 209 #define snewn(number, type) \
 210     ( (type *) smalloc ((number) * sizeof (type)) )
 211 #define sresize(array, number, type) \
 212     ( (type *) srealloc ((array), (number) * sizeof (type)) )
 213
 214 /*
 215  * misc.c
 216  */
 217 void free_cfg(config_item *cfg);
 218 void obfuscate_bitmap(unsigned char *bmp, int bits, int decode);
 219
 220 /* allocates output each time. len is always in bytes of binary data.
 221  * May assert (or just go wrong) if lengths are unchecked. */
 222 char *bin2hex(const unsigned char *in, int inlen);
 223 unsigned char *hex2bin(const char *in, int outlen);
 224
 225 /* Sets (and possibly dims) background from frontend default colour,
 226  * and auto-generates highlight and lowlight colours too. */
 227 void game_mkhighlight(frontend *fe, float *ret,
 228                       int background, int highlight, int lowlight);
 229
 230 /* Randomly shuffles an array of items. */
 231 void shuffle(void *array, int nelts, int eltsize, random_state *rs);
 232
 233 /* Draw a rectangle outline, using the frontend's draw_line. */
 234 void draw_rect_outline(frontend *fe, int x, int y, int w, int h,
 235                        int colour);
 236
 237 /*
 238  * version.c
 239  */
 240 extern char ver[];
 241
 242 /*
 243  * random.c
 244  */
 245 random_state *random_init(char *seed, int len);
 246 random_state *random_copy(random_state *tocopy);
 247 unsigned long random_bits(random_state *state, int bits);
 248 unsigned long random_upto(random_state *state, unsigned long limit);
 249 void random_free(random_state *state);
 250 char *random_state_encode(random_state *state);
 251 random_state *random_state_decode(char *input);
 252 /* random.c also exports SHA, which occasionally comes in useful. */
 253 typedef unsigned long uint32;
 254 typedef struct {
 255     uint32 h[5];
 256     unsigned char block[64];
 257     int blkused;
 258     uint32 lenhi, lenlo;
 259 } SHA_State;
 260 void SHA_Init(SHA_State *s);
 261 void SHA_Bytes(SHA_State *s, void *p, int len);
 262 void SHA_Final(SHA_State *s, unsigned char *output);
 263 void SHA_Simple(void *p, int len, unsigned char *output);
 264
 265 /*
 266  * Data structure containing the function calls and data specific
 267  * to a particular game. This is enclosed in a data structure so
 268  * that a particular platform can choose, if it wishes, to compile
 269  * all the games into a single combined executable rather than
 270  * having lots of little ones.
 271  */
 272 struct game {
 273     const char *name;
 274     const char *winhelp_topic;
 275     game_params *(*default_params)(void);
 276     int (*fetch_preset)(int i, char **name, game_params **params);
 277     void (*decode_params)(game_params *, char const *string);
 278     char *(*encode_params)(game_params *, int full);
 279     void (*free_params)(game_params *params);
 280     game_params *(*dup_params)(game_params *params);
 281     int can_configure;
 282     config_item *(*configure)(game_params *params);
 283     game_params *(*custom_params)(config_item *cfg);
 284     char *(*validate_params)(game_params *params, int full);
 285     char *(*new_desc)(game_params *params, random_state *rs,
 286                       char **aux, int interactive);
 287     char *(*validate_desc)(game_params *params, char *desc);
 288     game_state *(*new_game)(midend_data *me, game_params *params, char *desc);
 289     game_state *(*dup_game)(game_state *state);
 290     void (*free_game)(game_state *state);
 291     int can_solve;
 292     char *(*solve)(game_state *orig, game_state *curr,
 293                    char *aux, char **error);
 294     int can_format_as_text;
 295     char *(*text_format)(game_state *state);
 296     game_ui *(*new_ui)(game_state *state);
 297     void (*free_ui)(game_ui *ui);
 298     char *(*encode_ui)(game_ui *ui);
 299     void (*decode_ui)(game_ui *ui, char *encoding);
 300     void (*changed_state)(game_ui *ui, game_state *oldstate,
 301                           game_state *newstate);
 302     char *(*interpret_move)(game_state *state, game_ui *ui, game_drawstate *ds,
 303                             int x, int y, int button);
 304     game_state *(*execute_move)(game_state *state, char *move);
 305     int preferred_tilesize;
 306     void (*compute_size)(game_params *params, int tilesize, int *x, int *y);
 307     void (*set_size)(game_drawstate *ds, game_params *params, int tilesize);
 308     float *(*colours)(frontend *fe, game_state *state, int *ncolours);
 309     game_drawstate *(*new_drawstate)(game_state *state);
 310     void (*free_drawstate)(game_drawstate *ds);
 311     void (*redraw)(frontend *fe, game_drawstate *ds, game_state *oldstate,
 312                    game_state *newstate, int dir, game_ui *ui, float anim_time,
 313                    float flash_time);
 314     float (*anim_length)(game_state *oldstate, game_state *newstate, int dir,
 315                          game_ui *ui);
 316     float (*flash_length)(game_state *oldstate, game_state *newstate, int dir,
 317                           game_ui *ui);
 318     int (*wants_statusbar)(void);
 319     int is_timed;
 320     int (*timing_state)(game_state *state, game_ui *ui);
 321     int mouse_priorities;
 322 };
 323
 324 /*
 325  * For one-game-at-a-time platforms, there's a single structure
 326  * like the above, under a fixed name. For all-at-once platforms,
 327  * there's a list of all available puzzles in array form.
 328  */
 329 #ifdef COMBINED
 330 extern const game *gamelist[];
 331 extern const int gamecount;
 332 #else
 333 extern const game thegame;
 334 #endif
 335
 336 #endif /* PUZZLES_PUZZLES_H */