149255d7 |
1 | /* |
2 | * unequal.c |
3 | * |
4 | * Implementation of 'Futoshiki', a puzzle featured in the Guardian. |
5 | * |
6 | * TTD: |
7 | * add multiple-links-on-same-col/row solver nous |
8 | * Optimise set solver to use bit operations instead |
9 | * |
10 | * Guardian puzzles of note: |
11 | * #1: 5:0,0L,0L,0,0,0R,0,0L,0D,0L,0R,0,2,0D,0,0,0,0,0,0,0U,0,0,0,0U, |
12 | * #2: 5:0,0,0,4L,0L,0,2LU,0L,0U,0,0,0U,0,0,0,0,0D,0,3LRUD,0,0R,3,0L,0,0, |
13 | * #3: (reprint of #2) |
14 | * #4: |
15 | * #5: 5:0,0,0,0,0,0,2,0U,3U,0U,0,0,3,0,0,0,3,0D,4,0,0,0L,0R,0,0, |
16 | * #6: 5:0D,0L,0,0R,0,0,0D,0,3,0D,0,0R,0,0R,0D,0U,0L,0,1,2,0,0,0U,0,0L, |
17 | */ |
18 | |
19 | #include <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
22 | #include <assert.h> |
23 | #include <ctype.h> |
24 | #include <math.h> |
25 | |
26 | #include "puzzles.h" |
27 | #include "latin.h" /* contains typedef for digit */ |
28 | |
29 | /* ---------------------------------------------------------- |
30 | * Constant and structure definitions |
31 | */ |
32 | |
33 | #define FLASH_TIME 0.4F |
34 | |
35 | #define PREFERRED_TILE_SIZE 32 |
36 | |
37 | #define TILE_SIZE (ds->tilesize) |
38 | #define GAP_SIZE (TILE_SIZE/2) |
39 | #define SQUARE_SIZE (TILE_SIZE + GAP_SIZE) |
40 | |
41 | #define BORDER (TILE_SIZE / 2) |
42 | |
43 | #define COORD(x) ( (x) * SQUARE_SIZE + BORDER ) |
44 | #define FROMCOORD(x) ( ((x) - BORDER + SQUARE_SIZE) / SQUARE_SIZE - 1 ) |
45 | |
46 | #define GRID(p,w,x,y) ((p)->w[((y)*(p)->order)+(x)]) |
47 | #define GRID3(p,w,x,y,z) ((p)->w[ (((x)*(p)->order+(y))*(p)->order+(z)) ]) |
48 | #define HINT(p,x,y,n) GRID3(p, hints, x, y, n) |
49 | |
50 | enum { |
51 | COL_BACKGROUND, |
52 | COL_GRID, |
53 | COL_TEXT, COL_GUESS, COL_ERROR, COL_PENCIL, |
54 | COL_HIGHLIGHT, COL_LOWLIGHT, |
55 | NCOLOURS |
56 | }; |
57 | |
58 | struct game_params { |
59 | int order, diff; |
60 | }; |
61 | |
62 | #define F_IMMUTABLE 1 /* passed in as game description */ |
63 | #define F_GT_UP 2 |
64 | #define F_GT_RIGHT 4 |
65 | #define F_GT_DOWN 8 |
66 | #define F_GT_LEFT 16 |
67 | #define F_ERROR 32 |
68 | #define F_ERROR_UP 64 |
69 | #define F_ERROR_RIGHT 128 |
70 | #define F_ERROR_DOWN 256 |
71 | #define F_ERROR_LEFT 512 |
72 | |
73 | #define F_ERROR_MASK (F_ERROR|F_ERROR_UP|F_ERROR_RIGHT|F_ERROR_DOWN|F_ERROR_LEFT) |
74 | |
75 | struct game_state { |
76 | int order, completed, cheated; |
77 | digit *nums; /* actual numbers (size order^2) */ |
78 | unsigned char *hints; /* remaining possiblities (size order^3) */ |
79 | unsigned int *flags; /* flags (size order^2) */ |
80 | }; |
81 | |
82 | /* ---------------------------------------------------------- |
83 | * Game parameters and presets |
84 | */ |
85 | |
86 | /* Steal the method from map.c for difficulty levels. */ |
87 | #define DIFFLIST(A) \ |
88 | A(LATIN,Trivial,t) \ |
89 | A(EASY,Easy,e) \ |
90 | A(SET,Tricky,k) \ |
91 | A(EXTREME,Extreme,x) \ |
92 | A(RECURSIVE,Recursive,r) |
93 | |
94 | #define ENUM(upper,title,lower) DIFF_ ## upper, |
95 | #define TITLE(upper,title,lower) #title, |
96 | #define ENCODE(upper,title,lower) #lower |
97 | #define CONFIG(upper,title,lower) ":" #title |
98 | enum { DIFFLIST(ENUM) DIFF_IMPOSSIBLE = diff_impossible, DIFF_AMBIGUOUS = diff_ambiguous, DIFF_UNFINISHED = diff_unfinished }; |
99 | static char const *const unequal_diffnames[] = { DIFFLIST(TITLE) }; |
100 | static char const unequal_diffchars[] = DIFFLIST(ENCODE); |
101 | #define DIFFCOUNT lenof(unequal_diffchars) |
102 | #define DIFFCONFIG DIFFLIST(CONFIG) |
103 | |
104 | #define DEFAULT_PRESET 0 |
105 | |
106 | const static struct game_params unequal_presets[] = { |
107 | { 4, DIFF_EASY }, |
108 | { 5, DIFF_EASY }, |
109 | { 5, DIFF_SET }, |
110 | { 5, DIFF_EXTREME }, |
111 | { 6, DIFF_EASY }, |
112 | { 6, DIFF_SET }, |
113 | { 6, DIFF_EXTREME }, |
114 | { 7, DIFF_SET }, |
115 | { 7, DIFF_EXTREME }, |
116 | }; |
117 | |
118 | static int game_fetch_preset(int i, char **name, game_params **params) |
119 | { |
120 | game_params *ret; |
121 | char buf[80]; |
122 | |
123 | if (i < 0 || i >= lenof(unequal_presets)) |
124 | return FALSE; |
125 | |
126 | ret = snew(game_params); |
127 | *ret = unequal_presets[i]; /* structure copy */ |
128 | |
129 | sprintf(buf, "%dx%d %s", ret->order, ret->order, |
130 | unequal_diffnames[ret->diff]); |
131 | |
132 | *name = dupstr(buf); |
133 | *params = ret; |
134 | return TRUE; |
135 | } |
136 | |
137 | static game_params *default_params(void) |
138 | { |
139 | game_params *ret; |
140 | char *name; |
141 | |
142 | if (!game_fetch_preset(DEFAULT_PRESET, &name, &ret)) return NULL; |
143 | sfree(name); |
144 | return ret; |
145 | } |
146 | |
147 | static void free_params(game_params *params) |
148 | { |
149 | sfree(params); |
150 | } |
151 | |
152 | static game_params *dup_params(game_params *params) |
153 | { |
154 | game_params *ret = snew(game_params); |
155 | *ret = *params; /* structure copy */ |
156 | return ret; |
157 | } |
158 | |
159 | static void decode_params(game_params *ret, char const *string) |
160 | { |
161 | char const *p = string; |
162 | |
163 | ret->order = atoi(p); |
164 | while (*p && isdigit((unsigned char)*p)) p++; |
165 | |
166 | if (*p == 'd') { |
167 | int i; |
168 | p++; |
169 | ret->diff = DIFFCOUNT+1; /* ...which is invalid */ |
170 | if (*p) { |
171 | for (i = 0; i < DIFFCOUNT; i++) { |
172 | if (*p == unequal_diffchars[i]) |
173 | ret->diff = i; |
174 | } |
175 | p++; |
176 | } |
177 | } |
178 | } |
179 | |
180 | static char *encode_params(game_params *params, int full) |
181 | { |
182 | char ret[80]; |
183 | |
184 | sprintf(ret, "%d", params->order); |
185 | if (full) |
186 | sprintf(ret + strlen(ret), "d%c", unequal_diffchars[params->diff]); |
187 | |
188 | return dupstr(ret); |
189 | } |
190 | |
191 | static config_item *game_configure(game_params *params) |
192 | { |
193 | config_item *ret; |
194 | char buf[80]; |
195 | |
196 | ret = snewn(3, config_item); |
197 | |
198 | ret[0].name = "Size (s*s)"; |
199 | ret[0].type = C_STRING; |
200 | sprintf(buf, "%d", params->order); |
201 | ret[0].sval = dupstr(buf); |
202 | ret[0].ival = 0; |
203 | |
204 | ret[1].name = "Difficulty"; |
205 | ret[1].type = C_CHOICES; |
206 | ret[1].sval = DIFFCONFIG; |
207 | ret[1].ival = params->diff; |
208 | |
209 | ret[2].name = NULL; |
210 | ret[2].type = C_END; |
211 | ret[2].sval = NULL; |
212 | ret[2].ival = 0; |
213 | |
214 | return ret; |
215 | } |
216 | |
217 | static game_params *custom_params(config_item *cfg) |
218 | { |
219 | game_params *ret = snew(game_params); |
220 | |
221 | ret->order = atoi(cfg[0].sval); |
222 | ret->diff = cfg[1].ival; |
223 | |
224 | return ret; |
225 | } |
226 | |
227 | static char *validate_params(game_params *params, int full) |
228 | { |
229 | if (params->order < 3 || params->order > 32) |
230 | return "Order must be between 3 and 32"; |
231 | if (params->diff >= DIFFCOUNT) |
232 | return "Unknown difficulty rating."; |
233 | return NULL; |
234 | } |
235 | |
236 | /* ---------------------------------------------------------- |
237 | * Various utility functions |
238 | */ |
239 | |
240 | static const struct { unsigned int f, fo, fe; int dx, dy; char c; } gtthan[] = { |
241 | { F_GT_UP, F_GT_DOWN, F_ERROR_UP, 0, -1, '^' }, |
242 | { F_GT_RIGHT, F_GT_LEFT, F_ERROR_RIGHT, 1, 0, '>' }, |
243 | { F_GT_DOWN, F_GT_UP, F_ERROR_DOWN, 0, 1, 'v' }, |
244 | { F_GT_LEFT, F_GT_RIGHT, F_ERROR_LEFT, -1, 0, '<' } |
245 | }; |
246 | |
247 | static game_state *blank_game(int order) |
248 | { |
249 | game_state *state = snew(game_state); |
250 | int o2 = order*order, o3 = o2*order; |
251 | |
252 | state->order = order; |
253 | state->completed = state->cheated = 0; |
254 | |
255 | state->nums = snewn(o2, digit); |
256 | state->hints = snewn(o3, unsigned char); |
257 | state->flags = snewn(o2, unsigned int); |
258 | |
259 | memset(state->nums, 0, o2 * sizeof(digit)); |
260 | memset(state->hints, 0, o3); |
261 | memset(state->flags, 0, o2 * sizeof(unsigned int)); |
262 | |
263 | return state; |
264 | } |
265 | |
266 | static game_state *dup_game(game_state *state) |
267 | { |
268 | game_state *ret = blank_game(state->order); |
269 | int o2 = state->order*state->order, o3 = o2*state->order; |
270 | |
271 | memcpy(ret->nums, state->nums, o2 * sizeof(digit)); |
272 | memcpy(ret->hints, state->hints, o3); |
273 | memcpy(ret->flags, state->flags, o2 * sizeof(unsigned int)); |
274 | |
275 | return ret; |
276 | } |
277 | |
278 | static void free_game(game_state *state) |
279 | { |
280 | sfree(state->nums); |
281 | sfree(state->hints); |
282 | sfree(state->flags); |
283 | sfree(state); |
284 | } |
285 | |
286 | #define CHECKG(x,y) grid[(y)*o+(x)] |
287 | |
288 | /* Returns 0 if it finds an error, 1 otherwise. */ |
289 | static int check_gt(digit *grid, game_state *state, |
290 | int x, int y, int dx, int dy) |
291 | { |
292 | int o = state->order; |
293 | int n = CHECKG(x,y), dn = CHECKG(x+dx, y+dy); |
294 | |
295 | assert(n != 0); |
296 | if (dn == 0) return 1; |
297 | |
298 | if (n <= dn) { |
299 | debug(("check_gt error (%d,%d) (%d,%d)", x, y, x+dx, y+dy)); |
300 | return 0; |
301 | } |
302 | return 1; |
303 | } |
304 | |
305 | /* Returns 0 if it finds an error, 1 otherwise. */ |
306 | static int check_num_gt(digit *grid, game_state *state, |
307 | int x, int y, int me) |
308 | { |
309 | unsigned int f = GRID(state, flags, x, y); |
310 | int ret = 1, i; |
311 | |
312 | for (i = 0; i < 4; i++) { |
313 | if ((f & gtthan[i].f) && |
314 | !check_gt(grid, state, x, y, gtthan[i].dx, gtthan[i].dy)) { |
315 | if (me) GRID(state, flags, x, y) |= gtthan[i].fe; |
316 | ret = 0; |
317 | } |
318 | } |
319 | return ret; |
320 | } |
321 | |
322 | /* Returns 0 if it finds an error, 1 otherwise. */ |
323 | static int check_num_error(digit *grid, game_state *state, |
324 | int x, int y, int mark_errors) |
325 | { |
326 | int o = state->order; |
327 | int xx, yy, val = CHECKG(x,y), ret = 1; |
328 | |
329 | assert(val != 0); |
330 | |
331 | /* check for dups in same column. */ |
332 | for (yy = 0; yy < state->order; yy++) { |
333 | if (yy == y) continue; |
334 | if (CHECKG(x,yy) == val) ret = 0; |
335 | } |
336 | |
337 | /* check for dups in same row. */ |
338 | for (xx = 0; xx < state->order; xx++) { |
339 | if (xx == x) continue; |
340 | if (CHECKG(xx,y) == val) ret = 0; |
341 | } |
342 | |
343 | if (!ret) { |
344 | debug(("check_num_error (%d,%d) duplicate %d", x, y, val)); |
345 | if (mark_errors) GRID(state, flags, x, y) |= F_ERROR; |
346 | } |
347 | return ret; |
348 | } |
349 | |
350 | /* Returns: -1 for 'wrong' |
351 | * 0 for 'incomplete' |
352 | * 1 for 'complete and correct' |
353 | */ |
354 | static int check_complete(digit *grid, game_state *state, int mark_errors) |
355 | { |
356 | int x, y, ret = 1, o = state->order; |
357 | |
358 | if (mark_errors) |
359 | assert(grid == state->nums); |
360 | |
361 | for (x = 0; x < state->order; x++) { |
362 | for (y = 0; y < state->order; y++) { |
363 | if (mark_errors) |
364 | GRID(state, flags, x, y) &= ~F_ERROR_MASK; |
365 | if (grid[y*o+x] == 0) { |
366 | ret = 0; |
367 | } else { |
368 | if (!check_num_error(grid, state, x, y, mark_errors)) ret = -1; |
369 | if (!check_num_gt(grid, state, x, y, mark_errors)) ret = -1; |
370 | } |
371 | } |
372 | } |
373 | if (ret == 1 && latin_check(grid, o)) |
374 | ret = -1; |
375 | return ret; |
376 | } |
377 | |
378 | static char n2c(digit n, int order) { |
379 | if (n == 0) return ' '; |
380 | if (order < 10) { |
381 | if (n < 10) return '0' + n; |
382 | } else { |
383 | if (n < 11) return '0' + n-1; |
384 | n -= 11; |
385 | if (n <= 26) return 'A' + n; |
386 | } |
387 | return '?'; |
388 | } |
389 | |
390 | /* should be 'digit', but includes -1 for 'not a digit'. |
391 | * Includes keypresses (0 especially) for interpret_move. */ |
392 | static int c2n(int c, int order) { |
393 | if (c < 0 || c > 0xff) |
394 | return -1; |
395 | if (c == ' ' || c == '\010' || c == '\177') |
396 | return 0; |
397 | if (order < 10) { |
398 | if (c >= '1' && c <= '9') |
399 | return (int)(c - '0'); |
400 | } else { |
401 | if (c >= '0' && c <= '9') |
402 | return (int)(c - '0' + 1); |
403 | if (c >= 'A' && c <= 'Z') |
404 | return (int)(c - 'A' + 11); |
405 | if (c >= 'a' && c <= 'z') |
406 | return (int)(c - 'a' + 11); |
407 | } |
408 | return -1; |
409 | } |
410 | |
411 | static char *game_text_format(game_state *state) |
412 | { |
413 | int x, y, len, n; |
414 | char *ret, *p; |
415 | |
416 | len = (state->order*2) * (state->order*2-1) + 1; |
417 | ret = snewn(len, char); |
418 | p = ret; |
419 | |
420 | for (y = 0; y < state->order; y++) { |
421 | for (x = 0; x < state->order; x++) { |
422 | n = GRID(state, nums, x, y); |
423 | *p++ = n > 0 ? n2c(n, state->order) : '.'; |
424 | |
425 | if (x < (state->order-1)) { |
426 | if (GRID(state, flags, x, y) & F_GT_RIGHT) |
427 | *p++ = '>'; |
428 | else if (GRID(state, flags, x+1, y) & F_GT_LEFT) |
429 | *p++ = '<'; |
430 | else |
431 | *p++ = ' '; |
432 | } |
433 | } |
434 | *p++ = '\n'; |
435 | |
436 | if (y < (state->order-1)) { |
437 | for (x = 0; x < state->order; x++) { |
438 | if (GRID(state, flags, x, y) & F_GT_DOWN) |
439 | *p++ = 'v'; |
440 | else if (GRID(state, flags, x, y+1) & F_GT_UP) |
441 | *p++ = '^'; |
442 | else |
443 | *p++ = ' '; |
444 | |
445 | if (x < state->order-1) |
446 | *p++ = ' '; |
447 | } |
448 | *p++ = '\n'; |
449 | } |
450 | } |
451 | *p++ = '\0'; |
452 | |
453 | assert(p - ret == len); |
454 | return ret; |
455 | } |
456 | |
457 | #ifdef STANDALONE_SOLVER |
458 | static void game_debug(game_state *state) |
459 | { |
460 | char *dbg = game_text_format(state); |
461 | printf("%s", dbg); |
462 | sfree(dbg); |
463 | } |
464 | #endif |
465 | |
466 | /* ---------------------------------------------------------- |
467 | * Solver. |
468 | */ |
469 | |
470 | struct solver_link { |
471 | int len, gx, gy, lx, ly; |
472 | }; |
473 | |
474 | typedef struct game_solver { |
475 | struct latin_solver latin; /* keep first in struct! */ |
476 | |
477 | game_state *state; |
478 | |
479 | int nlinks, alinks; |
480 | struct solver_link *links; |
481 | } game_solver; |
482 | |
483 | #if 0 |
484 | static void solver_debug(game_solver *solver, int wide) |
485 | { |
486 | #ifdef STANDALONE_SOLVER |
487 | if (solver_show_working) { |
488 | if (!wide) |
489 | game_debug(solver->state); |
490 | else |
491 | latin_solver_debug(solver->latin.cube, solver->latin.o); |
492 | } |
493 | #endif |
494 | } |
495 | #endif |
496 | |
497 | static void solver_add_link(game_solver *solver, |
498 | int gx, int gy, int lx, int ly, int len) |
499 | { |
500 | if (solver->alinks < solver->nlinks+1) { |
501 | solver->alinks = solver->alinks*2 + 1; |
502 | /*debug(("resizing solver->links, new size %d", solver->alinks));*/ |
503 | solver->links = sresize(solver->links, solver->alinks, struct solver_link); |
504 | } |
505 | solver->links[solver->nlinks].gx = gx; |
506 | solver->links[solver->nlinks].gy = gy; |
507 | solver->links[solver->nlinks].lx = lx; |
508 | solver->links[solver->nlinks].ly = ly; |
509 | solver->links[solver->nlinks].len = len; |
510 | solver->nlinks++; |
511 | /*debug(("Adding new link: len %d (%d,%d) < (%d,%d), nlinks now %d", |
512 | len, lx, ly, gx, gy, solver->nlinks));*/ |
513 | } |
514 | |
515 | static game_solver *new_solver(digit *grid, game_state *state) |
516 | { |
517 | game_solver *solver = snew(game_solver); |
518 | int o = state->order; |
519 | int i, x, y; |
520 | unsigned int f; |
521 | |
522 | latin_solver_alloc(&solver->latin, grid, o); |
523 | |
524 | solver->nlinks = solver->alinks = 0; |
525 | solver->links = NULL; |
526 | |
527 | for (x = 0; x < o; x++) { |
528 | for (y = 0; y < o; y++) { |
529 | f = GRID(state, flags, x, y); |
530 | for (i = 0; i < 4; i++) { |
531 | if (f & gtthan[i].f) |
532 | solver_add_link(solver, x, y, x+gtthan[i].dx, y+gtthan[i].dy, 1); |
533 | } |
534 | } |
535 | } |
536 | |
537 | return solver; |
538 | } |
539 | |
540 | static void free_solver(game_solver *solver) |
541 | { |
542 | if (solver->links) sfree(solver->links); |
543 | latin_solver_free(&solver->latin); |
544 | sfree(solver); |
545 | } |
546 | |
547 | static void solver_nminmax(game_solver *usolver, |
548 | int x, int y, int *min_r, int *max_r, |
549 | unsigned char **ns_r) |
550 | { |
551 | struct latin_solver *solver = &usolver->latin; |
552 | int o = usolver->latin.o, min = o, max = 0, n; |
553 | unsigned char *ns; |
554 | |
555 | assert(x >= 0 && y >= 0 && x < o && y < o); |
556 | |
557 | ns = solver->cube + cubepos(x,y,1); |
558 | |
559 | if (grid(x,y) > 0) { |
560 | min = max = grid(x,y)-1; |
561 | } else { |
562 | for (n = 0; n < o; n++) { |
563 | if (ns[n]) { |
564 | if (n > max) max = n; |
565 | if (n < min) min = n; |
566 | } |
567 | } |
568 | } |
569 | if (min_r) *min_r = min; |
570 | if (max_r) *max_r = max; |
571 | if (ns_r) *ns_r = ns; |
572 | } |
573 | |
574 | static int solver_links(game_solver *usolver) |
575 | { |
576 | int i, j, lmin, gmax, nchanged = 0; |
577 | unsigned char *gns, *lns; |
578 | struct solver_link *link; |
579 | struct latin_solver *solver = &usolver->latin; |
580 | |
581 | for (i = 0; i < usolver->nlinks; i++) { |
582 | link = &usolver->links[i]; |
583 | solver_nminmax(usolver, link->gx, link->gy, NULL, &gmax, &gns); |
584 | solver_nminmax(usolver, link->lx, link->ly, &lmin, NULL, &lns); |
585 | |
586 | for (j = 0; j < solver->o; j++) { |
587 | /* For the 'greater' end of the link, discount all numbers |
588 | * too small to satisfy the inequality. */ |
589 | if (gns[j]) { |
590 | if (j < (lmin+link->len)) { |
591 | #ifdef STANDALONE_SOLVER |
592 | if (solver_show_working) { |
593 | printf("%*slink elimination, (%d,%d) > (%d,%d):\n", |
594 | solver_recurse_depth*4, "", |
595 | link->gx, link->gy, link->lx, link->ly); |
596 | printf("%*s ruling out %d at (%d,%d)\n", |
597 | solver_recurse_depth*4, "", |
598 | j+1, link->gx, link->gy); |
599 | } |
600 | #endif |
601 | cube(link->gx, link->gy, j+1) = FALSE; |
602 | nchanged++; |
603 | } |
604 | } |
605 | /* For the 'lesser' end of the link, discount all numbers |
606 | * too large to satisfy inequality. */ |
607 | if (lns[j]) { |
608 | if (j > (gmax-link->len)) { |
609 | #ifdef STANDALONE_SOLVER |
610 | if (solver_show_working) { |
611 | printf("%*slink elimination, (%d,%d) > (%d,%d):\n", |
612 | solver_recurse_depth*4, "", |
613 | link->gx, link->gy, link->lx, link->ly); |
614 | printf("%*s ruling out %d at (%d,%d)\n", |
615 | solver_recurse_depth*4, "", |
616 | j+1, link->lx, link->ly); |
617 | } |
618 | #endif |
619 | cube(link->lx, link->ly, j+1) = FALSE; |
620 | nchanged++; |
621 | } |
622 | } |
623 | } |
624 | } |
625 | return nchanged; |
626 | } |
627 | |
628 | static int solver_grid(digit *grid, int o, int maxdiff, void *ctx) |
629 | { |
630 | game_state *state = (game_state *)ctx; |
631 | game_solver *solver; |
632 | struct latin_solver *lsolver; |
633 | struct latin_solver_scratch *scratch; |
481628b3 |
634 | int ret, diff = DIFF_LATIN; |
149255d7 |
635 | |
636 | assert(maxdiff <= DIFF_RECURSIVE); |
637 | |
638 | assert(state->order == o); |
639 | solver = new_solver(grid, state); |
640 | |
641 | lsolver = &solver->latin; |
642 | scratch = latin_solver_new_scratch(lsolver); |
643 | |
644 | while (1) { |
645 | cont: |
646 | ret = latin_solver_diff_simple(lsolver); |
647 | if (ret < 0) { |
648 | diff = DIFF_IMPOSSIBLE; |
649 | goto got_result; |
650 | } else if (ret > 0) { |
651 | diff = max(diff, DIFF_LATIN); |
652 | goto cont; |
653 | } |
654 | |
655 | if (maxdiff <= DIFF_LATIN) |
656 | break; |
657 | |
658 | /* This bit is unequal-specific */ |
659 | ret = solver_links(solver); |
660 | if (ret < 0) { |
661 | diff = DIFF_IMPOSSIBLE; |
662 | goto got_result; |
663 | } else if (ret > 0) { |
664 | diff = max(diff, DIFF_EASY); |
665 | goto cont; |
666 | } |
667 | |
668 | if (maxdiff <= DIFF_EASY) |
669 | break; |
670 | |
481628b3 |
671 | /* Row- and column-wise set elimination */ |
672 | ret = latin_solver_diff_set(lsolver, scratch, 0); |
149255d7 |
673 | if (ret < 0) { |
674 | diff = DIFF_IMPOSSIBLE; |
675 | goto got_result; |
676 | } else if (ret > 0) { |
481628b3 |
677 | diff = max(diff, DIFF_SET); |
149255d7 |
678 | goto cont; |
679 | } |
680 | |
681 | if (maxdiff <= DIFF_SET) |
682 | break; |
683 | |
481628b3 |
684 | ret = latin_solver_diff_set(lsolver, scratch, 1); |
685 | if (ret < 0) { |
686 | diff = DIFF_IMPOSSIBLE; |
687 | goto got_result; |
688 | } else if (ret > 0) { |
689 | diff = max(diff, DIFF_EXTREME); |
690 | goto cont; |
691 | } |
692 | |
149255d7 |
693 | /* |
694 | * Forcing chains. |
695 | */ |
696 | if (latin_solver_forcing(lsolver, scratch)) { |
697 | diff = max(diff, DIFF_EXTREME); |
698 | goto cont; |
699 | } |
700 | |
701 | /* |
702 | * If we reach here, we have made no deductions in this |
703 | * iteration, so the algorithm terminates. |
704 | */ |
705 | break; |
706 | } |
707 | /* |
708 | * Last chance: if we haven't fully solved the puzzle yet, try |
709 | * recursing based on guesses for a particular square. We pick |
710 | * one of the most constrained empty squares we can find, which |
711 | * has the effect of pruning the search tree as much as |
712 | * possible. |
713 | */ |
714 | if (maxdiff == DIFF_RECURSIVE) { |
715 | int nsol = latin_solver_recurse(lsolver, DIFF_RECURSIVE, solver_grid, ctx); |
716 | if (nsol < 0) diff = DIFF_IMPOSSIBLE; |
717 | else if (nsol == 1) diff = DIFF_RECURSIVE; |
718 | else if (nsol > 1) diff = DIFF_AMBIGUOUS; |
719 | /* if nsol == 0 then we were complete anyway |
720 | * (and thus don't need to change diff) */ |
721 | } else { |
722 | int cc = check_complete(grid, state, 0); |
723 | if (cc == -1) diff = DIFF_IMPOSSIBLE; |
724 | if (cc == 0) diff = DIFF_UNFINISHED; |
725 | } |
726 | |
727 | got_result: |
728 | |
729 | #ifdef STANDALONE_SOLVER |
730 | if (solver_show_working) |
731 | printf("%*s%s found\n", |
732 | solver_recurse_depth*4, "", |
733 | diff == DIFF_IMPOSSIBLE ? "no solution (impossible)" : |
734 | diff == DIFF_UNFINISHED ? "no solution (unfinished)" : |
735 | diff == DIFF_AMBIGUOUS ? "multiple solutions" : |
736 | "one solution"); |
737 | #endif |
738 | |
739 | latin_solver_free_scratch(scratch); |
740 | memcpy(state->hints, solver->latin.cube, o*o*o); |
741 | free_solver(solver); |
742 | |
743 | return diff; |
744 | } |
745 | |
746 | static int solver_state(game_state *state, int maxdiff) |
747 | { |
748 | int diff = solver_grid(state->nums, state->order, maxdiff, (void*)state); |
749 | |
750 | if (diff == DIFF_IMPOSSIBLE) |
751 | return -1; |
752 | if (diff == DIFF_UNFINISHED) |
753 | return 0; |
754 | if (diff == DIFF_AMBIGUOUS) |
755 | return 2; |
756 | return 1; |
757 | } |
758 | |
759 | static game_state *solver_hint(game_state *state, int *diff_r, int mindiff, int maxdiff) |
760 | { |
761 | game_state *ret = dup_game(state); |
762 | int diff, r = 0; |
763 | |
764 | for (diff = mindiff; diff <= maxdiff; diff++) { |
765 | r = solver_state(ret, diff); |
766 | debug(("solver_state after %s %d", unequal_diffnames[diff], r)); |
767 | if (r != 0) goto done; |
768 | } |
769 | |
770 | done: |
771 | if (diff_r) *diff_r = (r > 0) ? diff : -1; |
772 | return ret; |
773 | } |
774 | |
775 | /* ---------------------------------------------------------- |
776 | * Game generation. |
777 | */ |
778 | |
779 | static char *latin_desc(digit *sq, size_t order) |
780 | { |
781 | int o2 = order*order, i; |
782 | char *soln = snewn(o2+2, char); |
783 | |
784 | soln[0] = 'S'; |
785 | for (i = 0; i < o2; i++) |
786 | soln[i+1] = n2c(sq[i], order); |
787 | soln[o2+1] = '\0'; |
788 | |
789 | return soln; |
790 | } |
791 | |
792 | /* returns non-zero if it placed (or could have placed) clue. */ |
793 | static int gg_place_clue(game_state *state, int ccode, digit *latin, int checkonly) |
794 | { |
795 | int loc = ccode / 5, which = ccode % 5; |
796 | int x = loc % state->order, y = loc / state->order; |
797 | |
798 | assert(loc < state->order*state->order); |
799 | |
800 | if (which == 4) { /* add number */ |
801 | if (state->nums[loc] != 0) { |
802 | #ifdef STANDALONE_SOLVER |
803 | if (state->nums[loc] != latin[loc]) { |
804 | printf("inconsistency for (%d,%d): state %d latin %d\n", |
805 | x, y, state->nums[loc], latin[loc]); |
806 | } |
807 | #endif |
808 | assert(state->nums[loc] == latin[loc]); |
809 | return 0; |
810 | } |
811 | if (!checkonly) { |
812 | state->nums[loc] = latin[loc]; |
813 | } |
814 | } else { /* add flag */ |
815 | int lx, ly, lloc; |
816 | |
817 | if (state->flags[loc] & gtthan[which].f) |
818 | return 0; /* already has flag. */ |
819 | |
820 | lx = x + gtthan[which].dx; |
821 | ly = y + gtthan[which].dy; |
822 | if (lx < 0 || ly < 0 || lx >= state->order || ly >= state->order) |
823 | return 0; /* flag compares to off grid */ |
824 | |
825 | lloc = loc + gtthan[which].dx + gtthan[which].dy*state->order; |
826 | if (latin[loc] <= latin[lloc]) |
827 | return 0; /* flag would be incorrect */ |
828 | |
829 | if (!checkonly) { |
830 | state->flags[loc] |= gtthan[which].f; |
831 | } |
832 | } |
833 | return 1; |
834 | } |
835 | |
836 | /* returns non-zero if it removed (or could have removed) the clue. */ |
837 | static int gg_remove_clue(game_state *state, int ccode, int checkonly) |
838 | { |
839 | int loc = ccode / 5, which = ccode % 5; |
840 | #ifdef STANDALONE_SOLVER |
841 | int x = loc % state->order, y = loc / state->order; |
842 | #endif |
843 | |
844 | assert(loc < state->order*state->order); |
845 | |
846 | if (which == 4) { /* remove number. */ |
847 | if (state->nums[loc] == 0) return 0; |
848 | if (!checkonly) { |
849 | #ifdef STANDALONE_SOLVER |
850 | if (solver_show_working) |
851 | printf("gg_remove_clue: removing %d at (%d,%d)", |
852 | state->nums[loc], x, y); |
853 | #endif |
854 | state->nums[loc] = 0; |
855 | } |
856 | } else { /* remove flag */ |
857 | if (!(state->flags[loc] & gtthan[which].f)) return 0; |
858 | if (!checkonly) { |
859 | #ifdef STANDALONE_SOLVER |
860 | if (solver_show_working) |
861 | printf("gg_remove_clue: removing %c at (%d,%d)", |
862 | gtthan[which].c, x, y); |
863 | #endif |
864 | state->flags[loc] &= ~gtthan[which].f; |
865 | } |
866 | } |
867 | return 1; |
868 | } |
869 | |
870 | static int gg_best_clue(game_state *state, int *scratch, digit *latin) |
871 | { |
872 | int ls = state->order * state->order * 5; |
873 | int maxposs = 0, minclues = 5, best = -1, i, j; |
874 | int nposs, nclues, loc, x, y; |
875 | |
876 | #ifdef STANDALONE_SOLVER |
877 | if (solver_show_working) { |
878 | game_debug(state); |
879 | latin_solver_debug(state->hints, state->order); |
880 | } |
881 | #endif |
882 | |
242a7d91 |
883 | for (i = ls; i-- > 0 ;) { |
149255d7 |
884 | if (!gg_place_clue(state, scratch[i], latin, 1)) continue; |
885 | |
886 | loc = scratch[i] / 5; |
887 | x = loc % state->order; y = loc / state->order; |
888 | for (j = nposs = 0; j < state->order; j++) { |
889 | if (state->hints[loc*state->order + j]) nposs++; |
890 | } |
891 | for (j = nclues = 0; j < 4; j++) { |
892 | if (state->flags[loc] & gtthan[j].f) nclues++; |
893 | } |
894 | if ((nposs > maxposs) || |
895 | (nposs == maxposs && nclues < minclues)) { |
896 | best = i; maxposs = nposs; minclues = nclues; |
897 | #ifdef STANDALONE_SOLVER |
898 | if (solver_show_working) |
899 | printf("gg_best_clue: b%d (%d,%d) new best [%d poss, %d clues].", |
900 | best, x, y, nposs, nclues); |
901 | #endif |
902 | } |
903 | } |
904 | /* if we didn't solve, we must have 1 clue to place! */ |
905 | assert(best != -1); |
906 | return best; |
907 | } |
908 | |
909 | #ifdef STANDALONE_SOLVER |
910 | int maxtries; |
911 | #define MAXTRIES maxtries |
912 | #else |
913 | #define MAXTRIES 50 |
914 | #endif |
915 | int gg_solved; |
916 | |
917 | static int game_assemble(game_state *new, int *scratch, digit *latin, |
918 | int difficulty) |
919 | { |
920 | game_state *copy = dup_game(new); |
921 | int best; |
922 | |
923 | if (difficulty >= DIFF_RECURSIVE) { |
924 | /* We mustn't use any solver that might guess answers; |
925 | * if it guesses wrongly but solves, gg_place_clue will |
926 | * get mighty confused. We will always trim clues down |
927 | * (making it more difficult) in game_strip, which doesn't |
928 | * have this problem. */ |
929 | difficulty = DIFF_RECURSIVE-1; |
930 | } |
931 | |
932 | #ifdef STANDALONE_SOLVER |
933 | if (solver_show_working) { |
934 | game_debug(new); |
935 | latin_solver_debug(new->hints, new->order); |
936 | } |
937 | #endif |
938 | |
939 | while(1) { |
940 | gg_solved++; |
941 | if (solver_state(copy, difficulty) == 1) break; |
942 | |
943 | best = gg_best_clue(copy, scratch, latin); |
944 | gg_place_clue(new, scratch[best], latin, 0); |
945 | gg_place_clue(copy, scratch[best], latin, 0); |
946 | } |
947 | free_game(copy); |
948 | #ifdef STANDALONE_SOLVER |
949 | if (solver_show_working) { |
950 | char *dbg = game_text_format(new); |
951 | printf("game_assemble: done, %d solver iterations:\n%s\n", gg_solved, dbg); |
952 | sfree(dbg); |
953 | } |
954 | #endif |
955 | return 0; |
956 | } |
957 | |
958 | static void game_strip(game_state *new, int *scratch, digit *latin, |
959 | int difficulty) |
960 | { |
961 | int o = new->order, o2 = o*o, lscratch = o2*5, i; |
962 | game_state *copy = blank_game(new->order); |
963 | |
964 | /* For each symbol (if it exists in new), try and remove it and |
965 | * solve again; if we couldn't solve without it put it back. */ |
966 | for (i = 0; i < lscratch; i++) { |
967 | if (!gg_remove_clue(new, scratch[i], 0)) continue; |
968 | |
969 | memcpy(copy->nums, new->nums, o2 * sizeof(digit)); |
970 | memcpy(copy->flags, new->flags, o2 * sizeof(unsigned int)); |
971 | gg_solved++; |
972 | if (solver_state(copy, difficulty) != 1) { |
973 | /* put clue back, we can't solve without it. */ |
242a7d91 |
974 | int ret = gg_place_clue(new, scratch[i], latin, 0); |
975 | assert(ret == 1); |
149255d7 |
976 | } else { |
977 | #ifdef STANDALONE_SOLVER |
978 | if (solver_show_working) |
979 | printf("game_strip: clue was redundant."); |
980 | #endif |
981 | } |
982 | } |
983 | free_game(copy); |
984 | #ifdef STANDALONE_SOLVER |
985 | if (solver_show_working) { |
986 | char *dbg = game_text_format(new); |
987 | debug(("game_strip: done, %d solver iterations.", gg_solved)); |
988 | debug(("%s", dbg)); |
989 | sfree(dbg); |
990 | } |
991 | #endif |
992 | } |
993 | |
994 | static char *new_game_desc(game_params *params, random_state *rs, |
995 | char **aux, int interactive) |
996 | { |
997 | digit *sq = NULL; |
998 | int i, x, y, retlen, k, nsol; |
999 | int o2 = params->order * params->order, ntries = 0; |
1000 | int *scratch, lscratch = o2*5; |
1001 | char *ret, buf[80]; |
1002 | game_state *state = blank_game(params->order); |
1003 | |
1004 | /* Generate a list of 'things to strip' (randomised later) */ |
1005 | scratch = snewn(lscratch, int); |
242a7d91 |
1006 | /* Put the numbers (4 mod 5) before the inequalities (0-3 mod 5) */ |
1007 | for (i = 0; i < lscratch; i++) scratch[i] = (i%o2)*5 + 4 - (i/o2); |
149255d7 |
1008 | |
1009 | generate: |
1010 | #ifdef STANDALONE_SOLVER |
1011 | if (solver_show_working) |
1012 | printf("new_game_desc: generating %s puzzle, ntries so far %d", |
1013 | unequal_diffnames[params->diff], ntries); |
1014 | #endif |
1015 | if (sq) sfree(sq); |
1016 | sq = latin_generate(params->order, rs); |
1017 | latin_debug(sq, params->order); |
242a7d91 |
1018 | /* Separately shuffle the numeric and inequality clues */ |
1019 | shuffle(scratch, lscratch/5, sizeof(int), rs); |
1020 | shuffle(scratch+lscratch/5, 4*lscratch/5, sizeof(int), rs); |
149255d7 |
1021 | |
1022 | memset(state->nums, 0, o2 * sizeof(digit)); |
1023 | memset(state->flags, 0, o2 * sizeof(unsigned int)); |
1024 | |
1025 | gg_solved = 0; |
1026 | if (game_assemble(state, scratch, sq, params->diff) < 0) |
1027 | goto generate; |
1028 | game_strip(state, scratch, sq, params->diff); |
1029 | |
1030 | if (params->diff > 0) { |
1031 | game_state *copy = dup_game(state); |
1032 | nsol = solver_state(copy, params->diff-1); |
1033 | free_game(copy); |
1034 | if (nsol > 0) { |
1035 | #ifdef STANDALONE_SOLVER |
1036 | if (solver_show_working) |
1037 | printf("game_assemble: puzzle as generated is too easy."); |
1038 | #endif |
1039 | if (ntries < MAXTRIES) { |
1040 | ntries++; |
1041 | goto generate; |
1042 | } |
1043 | #ifdef STANDALONE_SOLVER |
1044 | if (solver_show_working) |
1045 | printf("Unable to generate %s %dx%d after %d attempts.", |
1046 | unequal_diffnames[params->diff], |
1047 | params->order, params->order, MAXTRIES); |
1048 | #endif |
1049 | params->diff--; |
1050 | } |
1051 | } |
1052 | #ifdef STANDALONE_SOLVER |
1053 | if (solver_show_working) |
1054 | printf("new_game_desc: generated %s puzzle; %d attempts (%d solver).", |
1055 | unequal_diffnames[params->diff], ntries, gg_solved); |
1056 | #endif |
1057 | |
1058 | ret = NULL; retlen = 0; |
1059 | for (y = 0; y < params->order; y++) { |
1060 | for (x = 0; x < params->order; x++) { |
1061 | unsigned int f = GRID(state, flags, x, y); |
1062 | k = sprintf(buf, "%d%s%s%s%s,", |
1063 | GRID(state, nums, x, y), |
1064 | (f & F_GT_UP) ? "U" : "", |
1065 | (f & F_GT_RIGHT) ? "R" : "", |
1066 | (f & F_GT_DOWN) ? "D" : "", |
1067 | (f & F_GT_LEFT) ? "L" : ""); |
1068 | |
1069 | ret = sresize(ret, retlen + k + 1, char); |
1070 | strcpy(ret + retlen, buf); |
1071 | retlen += k; |
1072 | } |
1073 | } |
1074 | *aux = latin_desc(sq, params->order); |
1075 | |
1076 | free_game(state); |
1077 | sfree(sq); |
1078 | sfree(scratch); |
1079 | |
1080 | return ret; |
1081 | } |
1082 | |
1083 | static game_state *load_game(game_params *params, char *desc, |
1084 | char **why_r) |
1085 | { |
1086 | game_state *state = blank_game(params->order); |
1087 | char *p = desc; |
1088 | int i = 0, n, o = params->order, x, y; |
1089 | char *why = NULL; |
1090 | |
1091 | while (*p) { |
1092 | while (*p >= 'a' && *p <= 'z') { |
1093 | i += *p - 'a' + 1; |
1094 | p++; |
1095 | } |
1096 | if (i >= o*o) { |
1097 | why = "Too much data to fill grid"; goto fail; |
1098 | } |
1099 | |
1100 | if (*p < '0' && *p > '9') { |
1101 | why = "Expecting number in game description"; goto fail; |
1102 | } |
1103 | n = atoi(p); |
1104 | if (n < 0 || n > o) { |
1105 | why = "Out-of-range number in game description"; goto fail; |
1106 | } |
1107 | state->nums[i] = (digit)n; |
1108 | while (*p >= '0' && *p <= '9') p++; /* skip number */ |
1109 | |
1110 | if (state->nums[i] != 0) |
1111 | state->flags[i] |= F_IMMUTABLE; /* === number set by game description */ |
1112 | |
1113 | while (*p == 'U' || *p == 'R' || *p == 'D' || *p == 'L') { |
1114 | switch (*p) { |
1115 | case 'U': state->flags[i] |= F_GT_UP; break; |
1116 | case 'R': state->flags[i] |= F_GT_RIGHT; break; |
1117 | case 'D': state->flags[i] |= F_GT_DOWN; break; |
1118 | case 'L': state->flags[i] |= F_GT_LEFT; break; |
1119 | default: why = "Expecting flag URDL in game description"; goto fail; |
1120 | } |
1121 | p++; |
1122 | } |
1123 | i++; |
1124 | if (i < o*o && *p != ',') { |
1125 | why = "Missing separator"; goto fail; |
1126 | } |
1127 | if (*p == ',') p++; |
1128 | } |
1129 | if (i < o*o) { |
1130 | why = "Not enough data to fill grid"; goto fail; |
1131 | } |
1132 | i = 0; |
1133 | for (y = 0; y < o; y++) { |
1134 | for (x = 0; x < o; x++) { |
1135 | for (n = 0; n < 4; n++) { |
1136 | if (GRID(state, flags, x, y) & gtthan[n].f) { |
1137 | int nx = x + gtthan[n].dx; |
1138 | int ny = y + gtthan[n].dy; |
1139 | /* a flag must not point us off the grid. */ |
1140 | if (nx < 0 || ny < 0 || nx >= o || ny >= o) { |
1141 | why = "Flags go off grid"; goto fail; |
1142 | } |
1143 | /* if one cell is GT another, the other must not also |
1144 | * be GT the first. */ |
1145 | if (GRID(state, flags, nx, ny) & gtthan[n].fo) { |
1146 | why = "Flags contradicting each other"; goto fail; |
1147 | } |
1148 | } |
1149 | } |
1150 | } |
1151 | } |
1152 | |
1153 | return state; |
1154 | |
1155 | fail: |
1156 | free_game(state); |
1157 | if (why_r) *why_r = why; |
1158 | return NULL; |
1159 | } |
1160 | |
1161 | static game_state *new_game(midend *me, game_params *params, char *desc) |
1162 | { |
1163 | game_state *state = load_game(params, desc, NULL); |
1164 | if (!state) { |
1165 | assert("Unable to load ?validated game."); |
1166 | return NULL; |
1167 | } |
1168 | return state; |
1169 | } |
1170 | |
1171 | static char *validate_desc(game_params *params, char *desc) |
1172 | { |
1173 | char *why = NULL; |
1174 | game_state *dummy = load_game(params, desc, &why); |
1175 | if (dummy) { |
1176 | free_game(dummy); |
1177 | assert(!why); |
1178 | } else |
1179 | assert(why); |
1180 | return why; |
1181 | } |
1182 | |
1183 | static char *solve_game(game_state *state, game_state *currstate, |
1184 | char *aux, char **error) |
1185 | { |
1186 | game_state *solved; |
1187 | int r; |
1188 | char *ret = NULL; |
1189 | |
1190 | if (aux) return dupstr(aux); |
1191 | |
1192 | solved = dup_game(state); |
1193 | for (r = 0; r < state->order*state->order; r++) { |
1194 | if (!(solved->flags[r] & F_IMMUTABLE)) |
1195 | solved->nums[r] = 0; |
1196 | } |
1197 | r = solver_state(solved, DIFFCOUNT); |
1198 | if (r > 0) ret = latin_desc(solved->nums, solved->order); |
1199 | free_game(solved); |
1200 | return ret; |
1201 | } |
1202 | |
1203 | /* ---------------------------------------------------------- |
1204 | * Game UI input processing. |
1205 | */ |
1206 | |
1207 | struct game_ui { |
1208 | int hx, hy, hpencil; /* as for solo.c, highlight pos and type */ |
1209 | int cx, cy; /* cursor position (-1,-1 for none) */ |
1210 | }; |
1211 | |
1212 | static game_ui *new_ui(game_state *state) |
1213 | { |
1214 | game_ui *ui = snew(game_ui); |
1215 | |
1216 | ui->hx = ui->hy = -1; |
1217 | ui->hpencil = 0; |
1218 | |
1219 | ui->cx = ui->cy = -1; |
1220 | |
1221 | return ui; |
1222 | } |
1223 | |
1224 | static void free_ui(game_ui *ui) |
1225 | { |
1226 | sfree(ui); |
1227 | } |
1228 | |
1229 | static char *encode_ui(game_ui *ui) |
1230 | { |
1231 | return NULL; |
1232 | } |
1233 | |
1234 | static void decode_ui(game_ui *ui, char *encoding) |
1235 | { |
1236 | } |
1237 | |
1238 | static void game_changed_state(game_ui *ui, game_state *oldstate, |
1239 | game_state *newstate) |
1240 | { |
1241 | /* See solo.c; if we were pencil-mode highlighting and |
1242 | * somehow a square has just been properly filled, cancel |
1243 | * pencil mode. */ |
1244 | if (ui->hx >= 0 && ui->hy >= 0 && ui->hpencil && |
1245 | GRID(newstate, nums, ui->hx, ui->hy) != 0) { |
1246 | ui->hx = ui->hy = -1; |
1247 | } |
1248 | } |
1249 | |
1250 | struct game_drawstate { |
1251 | int tilesize, order, started; |
1252 | digit *nums; /* copy of nums, o^2 */ |
1253 | unsigned char *hints; /* copy of hints, o^3 */ |
1254 | unsigned int *flags; /* o^2 */ |
1255 | |
1256 | int hx, hy, hpencil; |
1257 | int cx, cy; |
1258 | int hflash; |
1259 | }; |
1260 | |
1261 | static char *interpret_move(game_state *state, game_ui *ui, game_drawstate *ds, |
1262 | int ox, int oy, int button) |
1263 | { |
1264 | int x = FROMCOORD(ox), y = FROMCOORD(oy), n; |
1265 | char buf[80]; |
1266 | |
1267 | button &= ~MOD_MASK; |
1268 | |
1269 | if (x >= 0 && x < ds->order && y >= 0 && y < ds->order) { |
1270 | if (button == LEFT_BUTTON) { |
1271 | /* normal highlighting for non-immutable squares */ |
1272 | if (GRID(state, flags, x, y) & F_IMMUTABLE) |
1273 | ui->hx = ui->hy = -1; |
1274 | else if (x == ui->hx && y == ui->hy && ui->hpencil == 0) |
1275 | ui->hx = ui->hy = -1; |
1276 | else { |
1277 | ui->hx = x; ui->hy = y; ui->hpencil = 0; |
1278 | } |
1279 | return ""; |
1280 | } |
1281 | if (button == RIGHT_BUTTON) { |
1282 | /* pencil highlighting for non-filled squares */ |
1283 | if (GRID(state, nums, x, y) != 0) |
1284 | ui->hx = ui->hy = -1; |
1285 | else if (x == ui->hx && y == ui->hy && ui->hpencil) |
1286 | ui->hx = ui->hy = -1; |
1287 | else { |
1288 | ui->hx = x; ui->hy = y; ui->hpencil = 1; |
1289 | } |
1290 | return ""; |
1291 | } |
1292 | } |
1293 | if (button == 'H' || button == 'h') |
1294 | return dupstr("H"); |
1295 | |
1296 | if (ui->hx != -1 && ui->hy != -1) { |
1297 | debug(("button %d, cbutton %d", button, (int)((char)button))); |
1298 | n = c2n(button, state->order); |
1299 | |
1300 | debug(("n %d, h (%d,%d) p %d flags 0x%x nums %d", |
1301 | n, ui->hx, ui->hy, ui->hpencil, |
1302 | GRID(state, flags, ui->hx, ui->hy), |
1303 | GRID(state, nums, ui->hx, ui->hy))); |
1304 | |
1305 | if (n < 0 || n > ds->order) |
1306 | return NULL; /* out of range */ |
1307 | if (GRID(state, flags, ui->hx, ui->hy) & F_IMMUTABLE) |
1308 | return NULL; /* can't edit immutable square (!) */ |
1309 | if (ui->hpencil && GRID(state, nums, ui->hx, ui->hy) > 0) |
1310 | return NULL; /* can't change hints on filled square (!) */ |
1311 | |
1312 | |
1313 | sprintf(buf, "%c%d,%d,%d", |
1314 | (char)(ui->hpencil && n > 0 ? 'P' : 'R'), ui->hx, ui->hy, n); |
1315 | |
1316 | ui->hx = ui->hy = -1; |
1317 | |
1318 | return dupstr(buf); |
1319 | } |
1320 | return NULL; |
1321 | } |
1322 | |
1323 | static game_state *execute_move(game_state *state, char *move) |
1324 | { |
1325 | game_state *ret = NULL; |
242a7d91 |
1326 | int x, y, n, i, rc; |
149255d7 |
1327 | |
1328 | debug(("execute_move: %s", move)); |
1329 | |
1330 | if ((move[0] == 'P' || move[0] == 'R') && |
1331 | sscanf(move+1, "%d,%d,%d", &x, &y, &n) == 3 && |
1332 | x >= 0 && x < state->order && y >= 0 && y < state->order && |
1333 | n >= 0 && n <= state->order) { |
1334 | ret = dup_game(state); |
1335 | if (move[0] == 'P' && n > 0) |
1336 | HINT(ret, x, y, n-1) = !HINT(ret, x, y, n-1); |
1337 | else { |
1338 | GRID(ret, nums, x, y) = n; |
1339 | for (i = 0; i < state->order; i++) |
1340 | HINT(ret, x, y, i) = 0; |
1341 | |
1342 | /* real change to grid; check for completion */ |
1343 | if (!ret->completed && check_complete(ret->nums, ret, 1) > 0) |
1344 | ret->completed = TRUE; |
1345 | } |
1346 | return ret; |
1347 | } else if (move[0] == 'S') { |
1348 | char *p; |
1349 | |
1350 | ret = dup_game(state); |
1351 | ret->completed = ret->cheated = TRUE; |
1352 | |
1353 | p = move+1; |
1354 | for (i = 0; i < state->order*state->order; i++) { |
1355 | n = c2n((int)*p, state->order); |
1356 | if (!*p || n <= 0 || n > state->order) |
1357 | goto badmove; |
1358 | ret->nums[i] = n; |
1359 | p++; |
1360 | } |
1361 | if (*p) goto badmove; |
242a7d91 |
1362 | rc = check_complete(ret->nums, ret, 1); |
1363 | assert(rc > 0); |
149255d7 |
1364 | return ret; |
1365 | } else if (move[0] == 'H') { |
1366 | return solver_hint(state, NULL, DIFF_EASY, DIFF_EASY); |
1367 | } |
1368 | |
1369 | badmove: |
1370 | if (ret) free_game(ret); |
1371 | return NULL; |
1372 | } |
1373 | |
1374 | /* ---------------------------------------------------------------------- |
1375 | * Drawing/printing routines. |
1376 | */ |
1377 | |
1378 | #define DRAW_SIZE (TILE_SIZE*ds->order + GAP_SIZE*(ds->order-1) + BORDER*2) |
1379 | |
1380 | static void game_compute_size(game_params *params, int tilesize, |
1381 | int *x, int *y) |
1382 | { |
1383 | /* Ick: fake up `ds->tilesize' for macro expansion purposes */ |
1384 | struct { int tilesize, order; } ads, *ds = &ads; |
1385 | ads.tilesize = tilesize; |
1386 | ads.order = params->order; |
1387 | |
1388 | *x = *y = DRAW_SIZE; |
1389 | } |
1390 | |
1391 | static void game_set_size(drawing *dr, game_drawstate *ds, |
1392 | game_params *params, int tilesize) |
1393 | { |
1394 | ds->tilesize = tilesize; |
1395 | } |
1396 | |
1397 | static float *game_colours(frontend *fe, int *ncolours) |
1398 | { |
1399 | float *ret = snewn(3 * NCOLOURS, float); |
1400 | int i; |
1401 | |
1402 | game_mkhighlight(fe, ret, COL_BACKGROUND, COL_HIGHLIGHT, COL_LOWLIGHT); |
1403 | |
1404 | for (i = 0; i < 3; i++) { |
1405 | ret[COL_TEXT * 3 + i] = 0.0F; |
1406 | ret[COL_GRID * 3 + i] = 0.5F; |
1407 | } |
1408 | |
1409 | /* Lots of these were taken from solo.c. */ |
1410 | ret[COL_GUESS * 3 + 0] = 0.0F; |
1411 | ret[COL_GUESS * 3 + 1] = 0.6F * ret[COL_BACKGROUND * 3 + 1]; |
1412 | ret[COL_GUESS * 3 + 2] = 0.0F; |
1413 | |
1414 | ret[COL_ERROR * 3 + 0] = 1.0F; |
1415 | ret[COL_ERROR * 3 + 1] = 0.0F; |
1416 | ret[COL_ERROR * 3 + 2] = 0.0F; |
1417 | |
1418 | ret[COL_PENCIL * 3 + 0] = 0.5F * ret[COL_BACKGROUND * 3 + 0]; |
1419 | ret[COL_PENCIL * 3 + 1] = 0.5F * ret[COL_BACKGROUND * 3 + 1]; |
1420 | ret[COL_PENCIL * 3 + 2] = ret[COL_BACKGROUND * 3 + 2]; |
1421 | |
1422 | *ncolours = NCOLOURS; |
1423 | return ret; |
1424 | } |
1425 | |
1426 | static game_drawstate *game_new_drawstate(drawing *dr, game_state *state) |
1427 | { |
1428 | struct game_drawstate *ds = snew(struct game_drawstate); |
1429 | int o2 = state->order*state->order, o3 = o2*state->order; |
1430 | |
1431 | ds->tilesize = 0; |
1432 | ds->order = state->order; |
1433 | |
1434 | ds->nums = snewn(o2, digit); |
1435 | ds->hints = snewn(o3, unsigned char); |
1436 | ds->flags = snewn(o2, unsigned int); |
1437 | memset(ds->nums, 0, o2*sizeof(digit)); |
1438 | memset(ds->hints, 0, o3); |
1439 | memset(ds->flags, 0, o2*sizeof(unsigned int)); |
1440 | |
1441 | ds->hx = ds->hy = ds->cx = ds->cy = -1; |
1442 | ds->started = ds->hpencil = ds->hflash = 0; |
1443 | |
1444 | return ds; |
1445 | } |
1446 | |
1447 | static void game_free_drawstate(drawing *dr, game_drawstate *ds) |
1448 | { |
1449 | sfree(ds->nums); |
1450 | sfree(ds->hints); |
1451 | sfree(ds->flags); |
1452 | sfree(ds); |
1453 | } |
1454 | |
1455 | static void draw_gt(drawing *dr, int ox, int oy, |
1456 | int dx1, int dy1, int dx2, int dy2, int col) |
1457 | { |
1458 | draw_line(dr, ox, oy, ox+dx1, oy+dy1, col); |
1459 | draw_line(dr, ox+dx1, oy+dy1, ox+dx1+dx2, oy+dy1+dy2, col); |
1460 | } |
1461 | |
1462 | static void draw_gts(drawing *dr, game_drawstate *ds, int ox, int oy, |
1463 | unsigned int f, int col, int needsupdate) |
1464 | { |
1465 | int g = GAP_SIZE, g2 = (g+1)/2, g4 = (g+1)/4; |
1466 | |
1467 | if (f & F_GT_UP) { |
1468 | draw_gt(dr, ox+g2, oy-g4, g2, -g2, g2, g2, |
1469 | (f & F_ERROR_UP) ? COL_ERROR : col); |
1470 | if (needsupdate) draw_update(dr, ox, oy-g, TILE_SIZE, g); |
1471 | } |
1472 | if (f & F_GT_RIGHT) { |
1473 | draw_gt(dr, ox+TILE_SIZE+g4, oy+g2, g2, g2, -g2, g2, |
1474 | (f & F_ERROR_RIGHT) ? COL_ERROR : col); |
1475 | if (needsupdate) draw_update(dr, ox+TILE_SIZE, oy, g, TILE_SIZE); |
1476 | } |
1477 | if (f & F_GT_DOWN) { |
1478 | draw_gt(dr, ox+g2, oy+TILE_SIZE+g4, g2, g2, g2, -g2, |
1479 | (f & F_ERROR_DOWN) ? COL_ERROR : col); |
1480 | if (needsupdate) draw_update(dr, ox, oy+TILE_SIZE, TILE_SIZE, g); |
1481 | } |
1482 | if (f & F_GT_LEFT) { |
1483 | draw_gt(dr, ox-g4, oy+g2, -g2, g2, g2, g2, |
1484 | (f & F_ERROR_LEFT) ? COL_ERROR : col); |
1485 | if (needsupdate) draw_update(dr, ox-g, oy, g, TILE_SIZE); |
1486 | } |
1487 | } |
1488 | |
1489 | static void draw_furniture(drawing *dr, game_drawstate *ds, game_state *state, |
1490 | game_ui *ui, int x, int y, int hflash) |
1491 | { |
1492 | int ox = COORD(x), oy = COORD(y), bg, hon, con; |
1493 | unsigned int f = GRID(state, flags, x, y); |
1494 | |
1495 | bg = hflash ? COL_HIGHLIGHT : COL_BACKGROUND; |
1496 | |
1497 | hon = (x == ui->hx && y == ui->hy); |
1498 | con = (x == ui->cx && y == ui->cy); |
1499 | |
1500 | /* Clear square. */ |
1501 | draw_rect(dr, ox, oy, TILE_SIZE, TILE_SIZE, |
1502 | (hon && !ui->hpencil) ? COL_HIGHLIGHT : bg); |
1503 | |
1504 | /* Draw the highlight (pencil or full), if we're the highlight */ |
1505 | if (hon && ui->hpencil) { |
1506 | int coords[6]; |
1507 | coords[0] = ox; |
1508 | coords[1] = oy; |
1509 | coords[2] = ox + TILE_SIZE/2; |
1510 | coords[3] = oy; |
1511 | coords[4] = ox; |
1512 | coords[5] = oy + TILE_SIZE/2; |
1513 | draw_polygon(dr, coords, 3, COL_HIGHLIGHT, COL_HIGHLIGHT); |
1514 | } |
1515 | |
1516 | /* Draw the square outline (which is the cursor, if we're the cursor). */ |
1517 | draw_rect_outline(dr, ox, oy, TILE_SIZE, TILE_SIZE, |
1518 | con ? COL_GUESS : COL_GRID); |
1519 | |
1520 | draw_update(dr, ox, oy, TILE_SIZE, TILE_SIZE); |
1521 | |
1522 | /* Draw the GT signs. */ |
1523 | draw_gts(dr, ds, ox, oy, f, COL_TEXT, 1); |
1524 | } |
1525 | |
1526 | static void draw_num(drawing *dr, game_drawstate *ds, int x, int y) |
1527 | { |
1528 | int ox = COORD(x), oy = COORD(y); |
1529 | unsigned int f = GRID(ds,flags,x,y); |
1530 | char str[2]; |
1531 | |
1532 | /* (can assume square has just been cleared) */ |
1533 | |
1534 | /* Draw number, choosing appropriate colour */ |
1535 | str[0] = n2c(GRID(ds, nums, x, y), ds->order); |
1536 | str[1] = '\0'; |
1537 | draw_text(dr, ox + TILE_SIZE/2, oy + TILE_SIZE/2, |
1538 | FONT_VARIABLE, 3*TILE_SIZE/4, ALIGN_VCENTRE | ALIGN_HCENTRE, |
1539 | (f & F_IMMUTABLE) ? COL_TEXT : (f & F_ERROR) ? COL_ERROR : COL_GUESS, str); |
1540 | } |
1541 | |
1542 | static void draw_hints(drawing *dr, game_drawstate *ds, int x, int y) |
1543 | { |
1544 | int ox = COORD(x), oy = COORD(y); |
1545 | int nhints, i, j, hw, hh, hmax, fontsz; |
1546 | char str[2]; |
1547 | |
1548 | /* (can assume square has just been cleared) */ |
1549 | |
1550 | /* Draw hints; steal ingenious algorithm (basically) |
1551 | * from solo.c:draw_number() */ |
1552 | for (i = nhints = 0; i < ds->order; i++) { |
1553 | if (HINT(ds, x, y, i)) nhints++; |
1554 | } |
1555 | |
1556 | for (hw = 1; hw * hw < nhints; hw++); |
1557 | if (hw < 3) hw = 3; |
1558 | hh = (nhints + hw - 1) / hw; |
1559 | if (hh < 2) hh = 2; |
1560 | hmax = max(hw, hh); |
1561 | fontsz = TILE_SIZE/(hmax*(11-hmax)/8); |
1562 | |
1563 | for (i = j = 0; i < ds->order; i++) { |
1564 | if (HINT(ds,x,y,i)) { |
1565 | int hx = j % hw, hy = j / hw; |
1566 | |
1567 | str[0] = n2c(i+1, ds->order); |
1568 | str[1] = '\0'; |
1569 | draw_text(dr, |
1570 | ox + (4*hx+3) * TILE_SIZE / (4*hw+2), |
1571 | oy + (4*hy+3) * TILE_SIZE / (4*hh+2), |
1572 | FONT_VARIABLE, fontsz, |
1573 | ALIGN_VCENTRE | ALIGN_HCENTRE, COL_PENCIL, str); |
1574 | j++; |
1575 | } |
1576 | } |
1577 | } |
1578 | |
1579 | static void game_redraw(drawing *dr, game_drawstate *ds, game_state *oldstate, |
1580 | game_state *state, int dir, game_ui *ui, |
1581 | float animtime, float flashtime) |
1582 | { |
1583 | int x, y, i, hchanged = 0, cchanged = 0, stale, hflash = 0; |
1584 | |
1585 | debug(("highlight old (%d,%d), new (%d,%d)", ds->hx, ds->hy, ui->hx, ui->hy)); |
1586 | |
1587 | if (flashtime > 0 && |
1588 | (flashtime <= FLASH_TIME/3 || flashtime >= FLASH_TIME*2/3)) |
1589 | hflash = 1; |
1590 | |
1591 | if (!ds->started) { |
1592 | draw_rect(dr, 0, 0, DRAW_SIZE, DRAW_SIZE, COL_BACKGROUND); |
1593 | draw_update(dr, 0, 0, DRAW_SIZE, DRAW_SIZE); |
1594 | } |
1595 | if (ds->hx != ui->hx || ds->hy != ui->hy || ds->hpencil != ui->hpencil) |
1596 | hchanged = 1; |
1597 | if (ds->cx != ui->cx || ds->cy != ui->cy) |
1598 | cchanged = 1; |
1599 | |
1600 | for (x = 0; x < ds->order; x++) { |
1601 | for (y = 0; y < ds->order; y++) { |
1602 | if (!ds->started) |
1603 | stale = 1; |
1604 | else if (hflash != ds->hflash) |
1605 | stale = 1; |
1606 | else |
1607 | stale = 0; |
1608 | |
1609 | if (hchanged) { |
1610 | if ((x == ui->hx && y == ui->hy) || |
1611 | (x == ds->hx && y == ds->hy)) |
1612 | stale = 1; |
1613 | } |
1614 | if (cchanged) { |
1615 | if ((x == ui->cx && y == ui->cy) || |
1616 | (x == ds->cx && y == ds->cy)) |
1617 | stale = 1; |
1618 | } |
1619 | |
1620 | if (GRID(state, nums, x, y) != GRID(ds, nums, x, y)) { |
1621 | GRID(ds, nums, x, y) = GRID(state, nums, x, y); |
1622 | stale = 1; |
1623 | } |
1624 | if (GRID(state, flags, x, y) != GRID(ds, flags, x, y)) { |
1625 | GRID(ds, flags, x, y) = GRID(state, flags, x, y); |
1626 | stale = 1; |
1627 | } |
1628 | if (GRID(ds, nums, x, y) == 0) { |
1629 | /* We're not a number square (therefore we might |
1630 | * display hints); do we need to update? */ |
1631 | for (i = 0; i < ds->order; i++) { |
1632 | if (HINT(state, x, y, i) != HINT(ds, x, y, i)) { |
1633 | HINT(ds, x, y, i) = HINT(state, x, y, i); |
1634 | stale = 1; |
1635 | } |
1636 | } |
1637 | } |
1638 | if (stale) { |
1639 | draw_furniture(dr, ds, state, ui, x, y, hflash); |
1640 | if (GRID(ds, nums, x, y) > 0) |
1641 | draw_num(dr, ds, x, y); |
1642 | else |
1643 | draw_hints(dr, ds, x, y); |
1644 | } |
1645 | } |
1646 | } |
1647 | ds->hx = ui->hx; ds->hy = ui->hy; ds->hpencil = ui->hpencil; |
1648 | ds->cx = ui->cx; ds->cy = ui->cy; |
1649 | ds->started = 1; |
1650 | ds->hflash = hflash; |
1651 | } |
1652 | |
1653 | static float game_anim_length(game_state *oldstate, game_state *newstate, |
1654 | int dir, game_ui *ui) |
1655 | { |
1656 | return 0.0F; |
1657 | } |
1658 | |
1659 | static float game_flash_length(game_state *oldstate, game_state *newstate, |
1660 | int dir, game_ui *ui) |
1661 | { |
1662 | if (!oldstate->completed && newstate->completed && |
1663 | !oldstate->cheated && !newstate->cheated) |
1664 | return FLASH_TIME; |
1665 | return 0.0F; |
1666 | } |
1667 | |
1668 | static int game_timing_state(game_state *state, game_ui *ui) |
1669 | { |
1670 | return TRUE; |
1671 | } |
1672 | |
1673 | static void game_print_size(game_params *params, float *x, float *y) |
1674 | { |
1675 | int pw, ph; |
1676 | |
1677 | /* 10mm squares by default, roughly the same as Grauniad. */ |
1678 | game_compute_size(params, 1000, &pw, &ph); |
1679 | *x = pw / 100.0F; |
1680 | *y = ph / 100.0F; |
1681 | } |
1682 | |
1683 | static void game_print(drawing *dr, game_state *state, int tilesize) |
1684 | { |
1685 | int ink = print_mono_colour(dr, 0); |
1686 | int x, y, o = state->order, ox, oy, n; |
1687 | char str[2]; |
1688 | |
1689 | /* Ick: fake up `ds->tilesize' for macro expansion purposes */ |
1690 | game_drawstate ads, *ds = &ads; |
1691 | game_set_size(dr, ds, NULL, tilesize); |
1692 | |
1693 | print_line_width(dr, 2 * TILE_SIZE / 40); |
1694 | |
1695 | /* Squares, numbers, gt signs */ |
1696 | for (y = 0; y < o; y++) { |
1697 | for (x = 0; x < o; x++) { |
1698 | ox = COORD(x); oy = COORD(y); |
1699 | n = GRID(state, nums, x, y); |
1700 | |
1701 | draw_rect_outline(dr, ox, oy, TILE_SIZE, TILE_SIZE, ink); |
1702 | |
1703 | str[0] = n ? n2c(n, state->order) : ' '; |
1704 | str[1] = '\0'; |
1705 | draw_text(dr, ox + TILE_SIZE/2, oy + TILE_SIZE/2, |
1706 | FONT_VARIABLE, TILE_SIZE/2, ALIGN_VCENTRE | ALIGN_HCENTRE, |
1707 | ink, str); |
1708 | |
1709 | draw_gts(dr, ds, ox, oy, GRID(state, flags, x, y), ink, 1); |
1710 | } |
1711 | } |
1712 | } |
1713 | |
1714 | /* ---------------------------------------------------------------------- |
1715 | * Housekeeping. |
1716 | */ |
1717 | |
1718 | #ifdef COMBINED |
1719 | #define thegame unequal |
1720 | #endif |
1721 | |
1722 | const struct game thegame = { |
1723 | "Unequal", "games.unequal", "unequal", |
1724 | default_params, |
1725 | game_fetch_preset, |
1726 | decode_params, |
1727 | encode_params, |
1728 | free_params, |
1729 | dup_params, |
1730 | TRUE, game_configure, custom_params, |
1731 | validate_params, |
1732 | new_game_desc, |
1733 | validate_desc, |
1734 | new_game, |
1735 | dup_game, |
1736 | free_game, |
1737 | TRUE, solve_game, |
1738 | TRUE, game_text_format, |
1739 | new_ui, |
1740 | free_ui, |
1741 | encode_ui, |
1742 | decode_ui, |
1743 | game_changed_state, |
1744 | interpret_move, |
1745 | execute_move, |
1746 | PREFERRED_TILE_SIZE, game_compute_size, game_set_size, |
1747 | game_colours, |
1748 | game_new_drawstate, |
1749 | game_free_drawstate, |
1750 | game_redraw, |
1751 | game_anim_length, |
1752 | game_flash_length, |
1753 | TRUE, FALSE, game_print_size, game_print, |
1754 | FALSE, /* wants_statusbar */ |
1755 | FALSE, game_timing_state, |
cb0c7d4a |
1756 | REQUIRE_RBUTTON | REQUIRE_NUMPAD, /* flags */ |
149255d7 |
1757 | }; |
1758 | |
1759 | /* ---------------------------------------------------------------------- |
1760 | * Standalone solver. |
1761 | */ |
1762 | |
1763 | #ifdef STANDALONE_SOLVER |
1764 | |
1765 | #include <time.h> |
1766 | #include <stdarg.h> |
1767 | |
1768 | const char *quis = NULL; |
1769 | |
1770 | #if 0 /* currently unused */ |
1771 | |
1772 | static void debug_printf(char *fmt, ...) |
1773 | { |
1774 | char buf[4096]; |
1775 | va_list ap; |
1776 | |
1777 | va_start(ap, fmt); |
1778 | vsprintf(buf, fmt, ap); |
1779 | puts(buf); |
1780 | va_end(ap); |
1781 | } |
1782 | |
1783 | static void game_printf(game_state *state) |
1784 | { |
1785 | char *dbg = game_text_format(state); |
1786 | printf("%s", dbg); |
1787 | sfree(dbg); |
1788 | } |
1789 | |
1790 | static void game_printf_wide(game_state *state) |
1791 | { |
1792 | int x, y, i, n; |
1793 | |
1794 | for (y = 0; y < state->order; y++) { |
1795 | for (x = 0; x < state->order; x++) { |
1796 | n = GRID(state, nums, x, y); |
1797 | for (i = 0; i < state->order; i++) { |
1798 | if (n > 0) |
1799 | printf("%c", n2c(n, state->order)); |
1800 | else if (HINT(state, x, y, i)) |
1801 | printf("%c", n2c(i+1, state->order)); |
1802 | else |
1803 | printf("."); |
1804 | } |
1805 | printf(" "); |
1806 | } |
1807 | printf("\n"); |
1808 | } |
1809 | printf("\n"); |
1810 | } |
1811 | |
1812 | #endif |
1813 | |
1814 | static void pdiff(int diff) |
1815 | { |
1816 | if (diff == DIFF_IMPOSSIBLE) |
1817 | printf("Game is impossible.\n"); |
1818 | else if (diff == DIFF_UNFINISHED) |
1819 | printf("Game has incomplete.\n"); |
1820 | else if (diff == DIFF_AMBIGUOUS) |
1821 | printf("Game has multiple solutions.\n"); |
1822 | else |
1823 | printf("Game has difficulty %s.\n", unequal_diffnames[diff]); |
1824 | } |
1825 | |
1826 | static int solve(game_params *p, char *desc, int debug) |
1827 | { |
1828 | game_state *st = new_game(NULL, p, desc); |
1829 | int diff; |
1830 | |
1831 | solver_show_working = debug; |
1832 | game_debug(st); |
1833 | |
1834 | diff = solver_grid(st->nums, st->order, DIFF_RECURSIVE, (void*)st); |
1835 | if (debug) pdiff(diff); |
1836 | |
1837 | game_debug(st); |
1838 | free_game(st); |
1839 | return diff; |
1840 | } |
1841 | |
1842 | static void check(game_params *p) |
1843 | { |
1844 | char *msg = validate_params(p, 1); |
1845 | if (msg) { |
1846 | fprintf(stderr, "%s: %s", quis, msg); |
1847 | exit(1); |
1848 | } |
1849 | } |
1850 | |
1851 | static int gen(game_params *p, random_state *rs, int debug) |
1852 | { |
1853 | char *desc, *aux; |
1854 | int diff; |
1855 | |
1856 | check(p); |
1857 | |
1858 | solver_show_working = debug; |
1859 | desc = new_game_desc(p, rs, &aux, 0); |
1860 | diff = solve(p, desc, debug); |
1861 | sfree(aux); |
1862 | sfree(desc); |
1863 | |
1864 | return diff; |
1865 | } |
1866 | |
1867 | static void soak(game_params *p, random_state *rs) |
1868 | { |
1869 | time_t tt_start, tt_now, tt_last; |
1870 | char *aux, *desc; |
1871 | game_state *st; |
1872 | int n = 0, neasy = 0, realdiff = p->diff; |
1873 | |
1874 | check(p); |
1875 | |
1876 | solver_show_working = 0; |
1877 | maxtries = 1; |
1878 | |
1879 | tt_start = tt_now = time(NULL); |
1880 | |
1881 | printf("Soak-generating a %dx%d grid, difficulty %s.\n", |
1882 | p->order, p->order, unequal_diffnames[p->diff]); |
1883 | |
1884 | while (1) { |
1885 | p->diff = realdiff; |
1886 | desc = new_game_desc(p, rs, &aux, 0); |
1887 | st = new_game(NULL, p, desc); |
1888 | solver_state(st, DIFF_RECURSIVE); |
1889 | free_game(st); |
1890 | sfree(aux); |
1891 | sfree(desc); |
1892 | |
1893 | n++; |
1894 | if (realdiff != p->diff) neasy++; |
1895 | |
1896 | tt_last = time(NULL); |
1897 | if (tt_last > tt_now) { |
1898 | tt_now = tt_last; |
1899 | printf("%d total, %3.1f/s; %d/%2.1f%% easy, %3.1f/s good.\n", |
1900 | n, (double)n / ((double)tt_now - tt_start), |
1901 | neasy, (double)neasy*100.0/(double)n, |
1902 | (double)(n - neasy) / ((double)tt_now - tt_start)); |
1903 | } |
1904 | } |
1905 | } |
1906 | |
1907 | static void usage_exit(const char *msg) |
1908 | { |
1909 | if (msg) |
1910 | fprintf(stderr, "%s: %s\n", quis, msg); |
1911 | fprintf(stderr, "Usage: %s [--seed SEED] --soak <params> | [game_id [game_id ...]]\n", quis); |
1912 | exit(1); |
1913 | } |
1914 | |
1915 | int main(int argc, const char *argv[]) |
1916 | { |
1917 | random_state *rs; |
1918 | time_t seed = time(NULL); |
1919 | int do_soak = 0, diff; |
1920 | |
1921 | game_params *p; |
1922 | |
1923 | maxtries = 50; |
1924 | |
1925 | quis = argv[0]; |
1926 | while (--argc > 0) { |
1927 | const char *p = *++argv; |
1928 | if (!strcmp(p, "--soak")) |
1929 | do_soak = 1; |
1930 | else if (!strcmp(p, "--seed")) { |
1931 | if (argc == 0) |
1932 | usage_exit("--seed needs an argument"); |
1933 | seed = (time_t)atoi(*++argv); |
1934 | argc--; |
1935 | } else if (*p == '-') |
1936 | usage_exit("unrecognised option"); |
1937 | else |
1938 | break; |
1939 | } |
1940 | rs = random_new((void*)&seed, sizeof(time_t)); |
1941 | |
1942 | if (do_soak == 1) { |
1943 | if (argc != 1) usage_exit("only one argument for --soak"); |
1944 | p = default_params(); |
1945 | decode_params(p, *argv); |
1946 | soak(p, rs); |
1947 | } else if (argc > 0) { |
1948 | int i; |
1949 | for (i = 0; i < argc; i++) { |
1950 | const char *id = *argv++; |
1951 | char *desc = strchr(id, ':'), *err; |
1952 | p = default_params(); |
1953 | if (desc) { |
1954 | *desc++ = '\0'; |
1955 | decode_params(p, id); |
1956 | err = validate_desc(p, desc); |
1957 | if (err) { |
1958 | fprintf(stderr, "%s: %s\n", quis, err); |
1959 | exit(1); |
1960 | } |
1961 | solve(p, desc, 1); |
1962 | } else { |
1963 | decode_params(p, id); |
1964 | diff = gen(p, rs, 1); |
1965 | } |
1966 | } |
1967 | } else { |
1968 | while(1) { |
1969 | p = default_params(); |
1970 | p->order = random_upto(rs, 7) + 3; |
1971 | p->diff = random_upto(rs, 4); |
1972 | diff = gen(p, rs, 0); |
1973 | pdiff(diff); |
1974 | } |
1975 | } |
1976 | |
1977 | return 0; |
1978 | } |
1979 | |
1980 | #endif |
1981 | |
1982 | /* vim: set shiftwidth=4 tabstop=8: */ |