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 <stdio.h>  /* for FILE */
   9 #include <stdlib.h> /* for size_t */
  10 #include <limits.h> /* for UINT_MAX */
  11
  12 #ifndef TRUE
  13 #define TRUE 1
  14 #endif
  15 #ifndef FALSE
  16 #define FALSE 0
  17 #endif
  18
  19 #define PI 3.141592653589793238462643383279502884197169399
  20
  21 #define lenof(array) ( sizeof(array) / sizeof(*(array)) )
  22
  23 #define STR_INT(x) #x
  24 #define STR(x) STR_INT(x)
  25
  26 /* NB not perfect because they evaluate arguments multiple times. */
  27 #ifndef max
  28 #define max(x,y) ( (x)>(y) ? (x) : (y) )
  29 #endif /* max */
  30 #ifndef min
  31 #define min(x,y) ( (x)<(y) ? (x) : (y) )
  32 #endif /* min */
  33
  34 enum {
  35     LEFT_BUTTON = 0x0200,
  36     MIDDLE_BUTTON,
  37     RIGHT_BUTTON,
  38     LEFT_DRAG,
  39     MIDDLE_DRAG,
  40     RIGHT_DRAG,
  41     LEFT_RELEASE,
  42     MIDDLE_RELEASE,
  43     RIGHT_RELEASE,
  44     CURSOR_UP,
  45     CURSOR_DOWN,
  46     CURSOR_LEFT,
  47     CURSOR_RIGHT,
  48     CURSOR_SELECT,
  49
  50     /* made smaller because of 'limited range of datatype' errors. */
  51     MOD_CTRL       = 0x1000,
  52     MOD_SHFT       = 0x2000,
  53     MOD_NUM_KEYPAD = 0x4000,
  54     MOD_MASK       = 0x7000 /* mask for all modifiers */
  55 };
  56
  57 #define IS_MOUSE_DOWN(m) ( (unsigned)((m) - LEFT_BUTTON) <= \
  58                                (unsigned)(RIGHT_BUTTON - LEFT_BUTTON))
  59 #define IS_MOUSE_DRAG(m) ( (unsigned)((m) - LEFT_DRAG) <= \
  60                                (unsigned)(RIGHT_DRAG - LEFT_DRAG))
  61 #define IS_MOUSE_RELEASE(m) ( (unsigned)((m) - LEFT_RELEASE) <= \
  62                                (unsigned)(RIGHT_RELEASE - LEFT_RELEASE))
  63
  64 /*
  65  * Flags in the back end's `flags' word.
  66  */
  67 /* Bit flags indicating mouse button priorities */
  68 #define BUTTON_BEATS(x,y) ( 1 << (((x)-LEFT_BUTTON)*3+(y)-LEFT_BUTTON) )
  69 /* Flag indicating that Solve operations should be animated */
  70 #define SOLVE_ANIMATES ( 1 << 9 )
  71 /* Pocket PC: Game requires right mouse button emulation */
  72 #define REQUIRE_RBUTTON ( 1 << 10 )
  73 /* Pocket PC: Game requires numeric input */
  74 #define REQUIRE_NUMPAD ( 1 << 11 )
  75 /* end of `flags' word definitions */
  76
  77 #ifdef _WIN32_WCE
  78   /* Pocket PC devices have small, portrait screen that requires more vivid colours */
  79   #define SMALL_SCREEN
  80   #define PORTRAIT_SCREEN
  81   #define VIVID_COLOURS
  82   #define STYLUS_BASED
  83 #endif
  84
  85 #define IGNOREARG(x) ( (x) = (x) )
  86
  87 typedef struct frontend frontend;
  88 typedef struct config_item config_item;
  89 typedef struct midend midend;
  90 typedef struct random_state random_state;
  91 typedef struct game_params game_params;
  92 typedef struct game_state game_state;
  93 typedef struct game_ui game_ui;
  94 typedef struct game_drawstate game_drawstate;
  95 typedef struct game game;
  96 typedef struct blitter blitter;
  97 typedef struct document document;
  98 typedef struct drawing_api drawing_api;
  99 typedef struct drawing drawing;
 100 typedef struct psdata psdata;
 101
 102 #define ALIGN_VNORMAL 0x000
 103 #define ALIGN_VCENTRE 0x100
 104
 105 #define ALIGN_HLEFT   0x000
 106 #define ALIGN_HCENTRE 0x001
 107 #define ALIGN_HRIGHT  0x002
 108
 109 #define FONT_FIXED    0
 110 #define FONT_VARIABLE 1
 111
 112 /* For printing colours */
 113 #define HATCH_SLASH     1
 114 #define HATCH_BACKSLASH 2
 115 #define HATCH_HORIZ     3
 116 #define HATCH_VERT      4
 117 #define HATCH_PLUS      5
 118 #define HATCH_X         6
 119
 120 /*
 121  * Structure used to pass configuration data between frontend and
 122  * game
 123  */
 124 enum { C_STRING, C_CHOICES, C_BOOLEAN, C_END };
 125 struct config_item {
 126     /*
 127      * `name' is never dynamically allocated.
 128      */
 129     char *name;
 130     /*
 131      * `type' contains one of the above values.
 132      */
 133     int type;
 134     /*
 135      * For C_STRING, `sval' is always dynamically allocated and
 136      * non-NULL. For C_BOOLEAN and C_END, `sval' is always NULL.
 137      * For C_CHOICES, `sval' is non-NULL, _not_ dynamically
 138      * allocated, and contains a set of option strings separated by
 139      * a delimiter. The delimeter is also the first character in
 140      * the string, so for example ":Foo:Bar:Baz" gives three
 141      * options `Foo', `Bar' and `Baz'.
 142      */
 143     char *sval;
 144     /*
 145      * For C_BOOLEAN, this is TRUE or FALSE. For C_CHOICES, it
 146      * indicates the chosen index from the `sval' list. In the
 147      * above example, 0==Foo, 1==Bar and 2==Baz.
 148      */
 149     int ival;
 150 };
 151
 152 /*
 153  * Platform routines
 154  */
 155
 156 /* We can't use #ifdef DEBUG, because Cygwin defines it by default. */
 157 #ifdef DEBUGGING
 158 #define debug(x) (debug_printf x)
 159 void debug_printf(char *fmt, ...);
 160 #else
 161 #define debug(x)
 162 #endif
 163
 164 void fatal(char *fmt, ...);
 165 void frontend_default_colour(frontend *fe, float *output);
 166 void deactivate_timer(frontend *fe);
 167 void activate_timer(frontend *fe);
 168 void get_random_seed(void **randseed, int *randseedsize);
 169
 170 /*
 171  * drawing.c
 172  */
 173 drawing *drawing_new(const drawing_api *api, midend *me, void *handle);
 174 void drawing_free(drawing *dr);
 175 void draw_text(drawing *dr, int x, int y, int fonttype, int fontsize,
 176                int align, int colour, char *text);
 177 void draw_rect(drawing *dr, int x, int y, int w, int h, int colour);
 178 void draw_line(drawing *dr, int x1, int y1, int x2, int y2, int colour);
 179 void draw_polygon(drawing *dr, int *coords, int npoints,
 180                   int fillcolour, int outlinecolour);
 181 void draw_circle(drawing *dr, int cx, int cy, int radius,
 182                  int fillcolour, int outlinecolour);
 183 void clip(drawing *dr, int x, int y, int w, int h);
 184 void unclip(drawing *dr);
 185 void start_draw(drawing *dr);
 186 void draw_update(drawing *dr, int x, int y, int w, int h);
 187 void end_draw(drawing *dr);
 188 void status_bar(drawing *dr, char *text);
 189 blitter *blitter_new(drawing *dr, int w, int h);
 190 void blitter_free(drawing *dr, blitter *bl);
 191 /* save puts the portion of the current display with top-left corner
 192  * (x,y) to the blitter. load puts it back again to the specified
 193  * coords, or else wherever it was saved from
 194  * (if x = y = BLITTER_FROMSAVED). */
 195 void blitter_save(drawing *dr, blitter *bl, int x, int y);
 196 #define BLITTER_FROMSAVED (-1)
 197 void blitter_load(drawing *dr, blitter *bl, int x, int y);
 198 void print_begin_doc(drawing *dr, int pages);
 199 void print_begin_page(drawing *dr, int number);
 200 void print_begin_puzzle(drawing *dr, float xm, float xc,
 201                         float ym, float yc, int pw, int ph, float wmm,
 202                         float scale);
 203 void print_end_puzzle(drawing *dr);
 204 void print_end_page(drawing *dr, int number);
 205 void print_end_doc(drawing *dr);
 206 void print_get_colour(drawing *dr, int colour, int printing_in_colour,
 207                       int *hatch, float *r, float *g, float *b);
 208 int print_mono_colour(drawing *dr, int grey); /* 0==black, 1==white */
 209 int print_grey_colour(drawing *dr, float grey);
 210 int print_hatched_colour(drawing *dr, int hatch);
 211 int print_rgb_mono_colour(drawing *dr, float r, float g, float b, int mono);
 212 int print_rgb_grey_colour(drawing *dr, float r, float g, float b, float grey);
 213 int print_rgb_hatched_colour(drawing *dr, float r, float g, float b,
 214                              int hatch);
 215 void print_line_width(drawing *dr, int width);
 216
 217 /*
 218  * midend.c
 219  */
 220 midend *midend_new(frontend *fe, const game *ourgame,
 221                    const drawing_api *drapi, void *drhandle);
 222 void midend_free(midend *me);
 223 void midend_set_params(midend *me, game_params *params);
 224 game_params *midend_get_params(midend *me);
 225 void midend_size(midend *me, int *x, int *y, int user_size);
 226 void midend_new_game(midend *me);
 227 void midend_restart_game(midend *me);
 228 void midend_stop_anim(midend *me);
 229 int midend_process_key(midend *me, int x, int y, int button);
 230 void midend_force_redraw(midend *me);
 231 void midend_redraw(midend *me);
 232 float *midend_colours(midend *me, int *ncolours);
 233 void midend_freeze_timer(midend *me, float tprop);
 234 void midend_timer(midend *me, float tplus);
 235 int midend_num_presets(midend *me);
 236 void midend_fetch_preset(midend *me, int n,
 237                          char **name, game_params **params);
 238 int midend_which_preset(midend *me);
 239 int midend_wants_statusbar(midend *me);
 240 enum { CFG_SETTINGS, CFG_SEED, CFG_DESC, CFG_FRONTEND_SPECIFIC };
 241 config_item *midend_get_config(midend *me, int which, char **wintitle);
 242 char *midend_set_config(midend *me, int which, config_item *cfg);
 243 char *midend_game_id(midend *me, char *id);
 244 char *midend_get_game_id(midend *me);
 245 char *midend_text_format(midend *me);
 246 char *midend_solve(midend *me);
 247 void midend_supersede_game_desc(midend *me, char *desc, char *privdesc);
 248 char *midend_rewrite_statusbar(midend *me, char *text);
 249 void midend_serialise(midend *me,
 250                       void (*write)(void *ctx, void *buf, int len),
 251                       void *wctx);
 252 char *midend_deserialise(midend *me,
 253                          int (*read)(void *ctx, void *buf, int len),
 254                          void *rctx);
 255 /* Printing functions supplied by the mid-end */
 256 char *midend_print_puzzle(midend *me, document *doc, int with_soln);
 257
 258 /*
 259  * malloc.c
 260  */
 261 void *smalloc(size_t size);
 262 void *srealloc(void *p, size_t size);
 263 void sfree(void *p);
 264 char *dupstr(const char *s);
 265 #define snew(type) \
 266     ( (type *) smalloc (sizeof (type)) )
 267 #define snewn(number, type) \
 268     ( (type *) smalloc ((number) * sizeof (type)) )
 269 #define sresize(array, number, type) \
 270     ( (type *) srealloc ((array), (number) * sizeof (type)) )
 271
 272 /*
 273  * misc.c
 274  */
 275 void free_cfg(config_item *cfg);
 276 void obfuscate_bitmap(unsigned char *bmp, int bits, int decode);
 277
 278 /* allocates output each time. len is always in bytes of binary data.
 279  * May assert (or just go wrong) if lengths are unchecked. */
 280 char *bin2hex(const unsigned char *in, int inlen);
 281 unsigned char *hex2bin(const char *in, int outlen);
 282
 283 /* Sets (and possibly dims) background from frontend default colour,
 284  * and auto-generates highlight and lowlight colours too. */
 285 void game_mkhighlight(frontend *fe, float *ret,
 286                       int background, int highlight, int lowlight);
 287 /* As above, but starts from a provided background colour rather
 288  * than the frontend default. */
 289 void game_mkhighlight_specific(frontend *fe, float *ret,
 290                                int background, int highlight, int lowlight);
 291
 292 /* Randomly shuffles an array of items. */
 293 void shuffle(void *array, int nelts, int eltsize, random_state *rs);
 294
 295 /* Draw a rectangle outline, using the drawing API's draw_line. */
 296 void draw_rect_outline(drawing *dr, int x, int y, int w, int h,
 297                        int colour);
 298
 299 /*
 300  * dsf.c
 301  */
 302 int *snew_dsf(int size);
 303
 304 void print_dsf(int *dsf, int size);
 305
 306 /* Return the canonical element of the equivalence class containing element
 307  * val.  If 'inverse' is non-NULL, this function will put into it a flag
 308  * indicating whether the canonical element is inverse to val. */
 309 int edsf_canonify(int *dsf, int val, int *inverse);
 310 int dsf_canonify(int *dsf, int val);
 311 int dsf_size(int *dsf, int val);
 312
 313 /* Allow the caller to specify that two elements should be in the same
 314  * equivalence class.  If 'inverse' is TRUE, the elements are actually opposite
 315  * to one another in some sense.  This function will fail an assertion if the
 316  * caller gives it self-contradictory data, ie if two elements are claimed to
 317  * be both opposite and non-opposite. */
 318 void edsf_merge(int *dsf, int v1, int v2, int inverse);
 319 void dsf_merge(int *dsf, int v1, int v2);
 320 void dsf_init(int *dsf, int len);
 321
 322 /*
 323  * version.c
 324  */
 325 extern char ver[];
 326
 327 /*
 328  * random.c
 329  */
 330 random_state *random_new(char *seed, int len);
 331 random_state *random_copy(random_state *tocopy);
 332 unsigned long random_bits(random_state *state, int bits);
 333 unsigned long random_upto(random_state *state, unsigned long limit);
 334 void random_free(random_state *state);
 335 char *random_state_encode(random_state *state);
 336 random_state *random_state_decode(char *input);
 337 /* random.c also exports SHA, which occasionally comes in useful. */
 338 #if __STDC_VERSION__ >= 199901L
 339 #include <stdint.h>
 340 typedef uint32_t uint32;
 341 #elif UINT_MAX >= 4294967295L
 342 typedef unsigned int uint32;
 343 #else
 344 typedef unsigned long uint32;
 345 #endif
 346 typedef struct {
 347     uint32 h[5];
 348     unsigned char block[64];
 349     int blkused;
 350     uint32 lenhi, lenlo;
 351 } SHA_State;
 352 void SHA_Init(SHA_State *s);
 353 void SHA_Bytes(SHA_State *s, void *p, int len);
 354 void SHA_Final(SHA_State *s, unsigned char *output);
 355 void SHA_Simple(void *p, int len, unsigned char *output);
 356
 357 /*
 358  * printing.c
 359  */
 360 document *document_new(int pw, int ph, float userscale);
 361 void document_free(document *doc);
 362 void document_add_puzzle(document *doc, const game *game, game_params *par,
 363                          game_state *st, game_state *st2);
 364 void document_print(document *doc, drawing *dr);
 365
 366 /*
 367  * ps.c
 368  */
 369 psdata *ps_init(FILE *outfile, int colour);
 370 void ps_free(psdata *ps);
 371 drawing *ps_drawing_api(psdata *ps);
 372
 373 /*
 374  * combi.c: provides a structure and functions for iterating over
 375  * combinations (i.e. choosing r things out of n).
 376  */
 377 typedef struct _combi_ctx {
 378   int r, n, nleft, total;
 379   int *a;
 380 } combi_ctx;
 381
 382 combi_ctx *new_combi(int r, int n);
 383 void reset_combi(combi_ctx *combi);
 384 combi_ctx *next_combi(combi_ctx *combi); /* returns NULL for end */
 385 void free_combi(combi_ctx *combi);
 386
 387 /*
 388  * divvy.c
 389  */
 390 /* divides w*h rectangle into pieces of size k. Returns w*h dsf. */
 391 int *divvy_rectangle(int w, int h, int k, random_state *rs);
 392
 393 /*
 394  * Data structure containing the function calls and data specific
 395  * to a particular game. This is enclosed in a data structure so
 396  * that a particular platform can choose, if it wishes, to compile
 397  * all the games into a single combined executable rather than
 398  * having lots of little ones.
 399  */
 400 struct game {
 401     const char *name;
 402     const char *winhelp_topic, *htmlhelp_topic;
 403     game_params *(*default_params)(void);
 404     int (*fetch_preset)(int i, char **name, game_params **params);
 405     void (*decode_params)(game_params *, char const *string);
 406     char *(*encode_params)(game_params *, int full);
 407     void (*free_params)(game_params *params);
 408     game_params *(*dup_params)(game_params *params);
 409     int can_configure;
 410     config_item *(*configure)(game_params *params);
 411     game_params *(*custom_params)(config_item *cfg);
 412     char *(*validate_params)(game_params *params, int full);
 413     char *(*new_desc)(game_params *params, random_state *rs,
 414                       char **aux, int interactive);
 415     char *(*validate_desc)(game_params *params, char *desc);
 416     game_state *(*new_game)(midend *me, game_params *params, char *desc);
 417     game_state *(*dup_game)(game_state *state);
 418     void (*free_game)(game_state *state);
 419     int can_solve;
 420     char *(*solve)(game_state *orig, game_state *curr,
 421                    char *aux, char **error);
 422     int can_format_as_text;
 423     char *(*text_format)(game_state *state);
 424     game_ui *(*new_ui)(game_state *state);
 425     void (*free_ui)(game_ui *ui);
 426     char *(*encode_ui)(game_ui *ui);
 427     void (*decode_ui)(game_ui *ui, char *encoding);
 428     void (*changed_state)(game_ui *ui, game_state *oldstate,
 429                           game_state *newstate);
 430     char *(*interpret_move)(game_state *state, game_ui *ui, game_drawstate *ds,
 431                             int x, int y, int button);
 432     game_state *(*execute_move)(game_state *state, char *move);
 433     int preferred_tilesize;
 434     void (*compute_size)(game_params *params, int tilesize, int *x, int *y);
 435     void (*set_size)(drawing *dr, game_drawstate *ds,
 436                      game_params *params, int tilesize);
 437     float *(*colours)(frontend *fe, int *ncolours);
 438     game_drawstate *(*new_drawstate)(drawing *dr, game_state *state);
 439     void (*free_drawstate)(drawing *dr, game_drawstate *ds);
 440     void (*redraw)(drawing *dr, game_drawstate *ds, game_state *oldstate,
 441                    game_state *newstate, int dir, game_ui *ui, float anim_time,
 442                    float flash_time);
 443     float (*anim_length)(game_state *oldstate, game_state *newstate, int dir,
 444                          game_ui *ui);
 445     float (*flash_length)(game_state *oldstate, game_state *newstate, int dir,
 446                           game_ui *ui);
 447     int can_print, can_print_in_colour;
 448     void (*print_size)(game_params *params, float *x, float *y);
 449     void (*print)(drawing *dr, game_state *state, int tilesize);
 450     int wants_statusbar;
 451     int is_timed;
 452     int (*timing_state)(game_state *state, game_ui *ui);
 453     int flags;
 454 };
 455
 456 /*
 457  * Data structure containing the drawing API implemented by the
 458  * front end and also by cross-platform printing modules such as
 459  * PostScript.
 460  */
 461 struct drawing_api {
 462     void (*draw_text)(void *handle, int x, int y, int fonttype, int fontsize,
 463                       int align, int colour, char *text);
 464     void (*draw_rect)(void *handle, int x, int y, int w, int h, int colour);
 465     void (*draw_line)(void *handle, int x1, int y1, int x2, int y2,
 466                       int colour);
 467     void (*draw_polygon)(void *handle, int *coords, int npoints,
 468                          int fillcolour, int outlinecolour);
 469     void (*draw_circle)(void *handle, int cx, int cy, int radius,
 470                         int fillcolour, int outlinecolour);
 471     void (*draw_update)(void *handle, int x, int y, int w, int h);
 472     void (*clip)(void *handle, int x, int y, int w, int h);
 473     void (*unclip)(void *handle);
 474     void (*start_draw)(void *handle);
 475     void (*end_draw)(void *handle);
 476     void (*status_bar)(void *handle, char *text);
 477     blitter *(*blitter_new)(void *handle, int w, int h);
 478     void (*blitter_free)(void *handle, blitter *bl);
 479     void (*blitter_save)(void *handle, blitter *bl, int x, int y);
 480     void (*blitter_load)(void *handle, blitter *bl, int x, int y);
 481     void (*begin_doc)(void *handle, int pages);
 482     void (*begin_page)(void *handle, int number);
 483     void (*begin_puzzle)(void *handle, float xm, float xc,
 484                          float ym, float yc, int pw, int ph, float wmm);
 485     void (*end_puzzle)(void *handle);
 486     void (*end_page)(void *handle, int number);
 487     void (*end_doc)(void *handle);
 488     void (*line_width)(void *handle, float width);
 489 };
 490
 491 /*
 492  * For one-game-at-a-time platforms, there's a single structure
 493  * like the above, under a fixed name. For all-at-once platforms,
 494  * there's a list of all available puzzles in array form.
 495  */
 496 #ifdef COMBINED
 497 extern const game *gamelist[];
 498 extern const int gamecount;
 499 #else
 500 extern const game thegame;
 501 #endif
 502
 503 #endif /* PUZZLES_PUZZLES_H */