2 * mines.c: Minesweeper clone with sophisticated grid generation.
6 * - think about configurably supporting question marks. Once,
7 * that is, we've thought about configurability in general!
21 COL_BACKGROUND, COL_BACKGROUND2,
22 COL_1, COL_2, COL_3, COL_4, COL_5, COL_6, COL_7, COL_8,
23 COL_MINE, COL_BANG, COL_CROSS, COL_FLAG, COL_FLAGBASE, COL_QUERY,
24 COL_HIGHLIGHT, COL_LOWLIGHT,
29 #define PREFERRED_TILE_SIZE 20
30 #define TILE_SIZE (ds->tilesize)
31 #define BORDER (TILE_SIZE * 3 / 2)
32 #define HIGHLIGHT_WIDTH (TILE_SIZE / 10)
33 #define OUTER_HIGHLIGHT_WIDTH (BORDER / 10)
34 #define COORD(x) ( (x) * TILE_SIZE + BORDER )
35 #define FROMCOORD(x) ( ((x) - BORDER + TILE_SIZE) / TILE_SIZE - 1 )
37 #define FLASH_FRAME 0.13F
46 * This structure is shared between all the game_states for a
47 * given instance of the puzzle, so we reference-count it.
52 * If we haven't yet actually generated the mine layout, here's
53 * all the data we will need to do so.
57 midend *me; /* to give back the new game desc */
61 int w, h, n, dead, won;
63 struct mine_layout *layout; /* real mine positions */
64 signed char *grid; /* player knowledge */
66 * Each item in the `grid' array is one of the following values:
68 * - 0 to 8 mean the square is open and has a surrounding mine
71 * - -1 means the square is marked as a mine.
73 * - -2 means the square is unknown.
75 * - -3 means the square is marked with a question mark
76 * (FIXME: do we even want to bother with this?).
78 * - 64 means the square has had a mine revealed when the game
81 * - 65 means the square had a mine revealed and this was the
82 * one the player hits.
84 * - 66 means the square has a crossed-out mine because the
85 * player had incorrectly marked it.
89 static game_params *default_params(void)
91 game_params *ret = snew(game_params);
100 static const struct game_params mines_presets[] = {
109 static int game_fetch_preset(int i, char **name, game_params **params)
114 if (i < 0 || i >= lenof(mines_presets))
117 ret = snew(game_params);
118 *ret = mines_presets[i];
120 sprintf(str, "%dx%d, %d mines", ret->w, ret->h, ret->n);
127 static void free_params(game_params *params)
132 static game_params *dup_params(game_params *params)
134 game_params *ret = snew(game_params);
135 *ret = *params; /* structure copy */
139 static void decode_params(game_params *params, char const *string)
141 char const *p = string;
144 while (*p && isdigit((unsigned char)*p)) p++;
148 while (*p && isdigit((unsigned char)*p)) p++;
150 params->h = params->w;
155 while (*p && (*p == '.' || isdigit((unsigned char)*p))) p++;
157 params->n = params->w * params->h / 10;
163 params->unique = FALSE;
165 p++; /* skip any other gunk */
169 static char *encode_params(game_params *params, int full)
174 len = sprintf(ret, "%dx%d", params->w, params->h);
176 * Mine count is a generation-time parameter, since it can be
177 * deduced from the mine bitmap!
180 len += sprintf(ret+len, "n%d", params->n);
181 if (full && !params->unique)
183 assert(len < lenof(ret));
189 static config_item *game_configure(game_params *params)
194 ret = snewn(5, config_item);
196 ret[0].name = "Width";
197 ret[0].type = C_STRING;
198 sprintf(buf, "%d", params->w);
199 ret[0].sval = dupstr(buf);
202 ret[1].name = "Height";
203 ret[1].type = C_STRING;
204 sprintf(buf, "%d", params->h);
205 ret[1].sval = dupstr(buf);
208 ret[2].name = "Mines";
209 ret[2].type = C_STRING;
210 sprintf(buf, "%d", params->n);
211 ret[2].sval = dupstr(buf);
214 ret[3].name = "Ensure solubility";
215 ret[3].type = C_BOOLEAN;
217 ret[3].ival = params->unique;
227 static game_params *custom_params(config_item *cfg)
229 game_params *ret = snew(game_params);
231 ret->w = atoi(cfg[0].sval);
232 ret->h = atoi(cfg[1].sval);
233 ret->n = atoi(cfg[2].sval);
234 if (strchr(cfg[2].sval, '%'))
235 ret->n = ret->n * (ret->w * ret->h) / 100;
236 ret->unique = cfg[3].ival;
241 static char *validate_params(game_params *params, int full)
244 * Lower limit on grid size: each dimension must be at least 3.
245 * 1 is theoretically workable if rather boring, but 2 is a
246 * real problem: there is often _no_ way to generate a uniquely
247 * solvable 2xn Mines grid. You either run into two mines
248 * blocking the way and no idea what's behind them, or one mine
249 * and no way to know which of the two rows it's in. If the
250 * mine count is even you can create a soluble grid by packing
251 * all the mines at one end (so what when you hit a two-mine
252 * wall there are only as many covered squares left as there
253 * are mines); but if it's odd, you are doomed, because you
254 * _have_ to have a gap somewhere which you can't determine the
257 if (full && params->unique && (params->w <= 2 || params->h <= 2))
258 return "Width and height must both be greater than two";
259 if (params->n > params->w * params->h - 9)
260 return "Too many mines for grid size";
263 * FIXME: Need more constraints here. Not sure what the
264 * sensible limits for Minesweeper actually are. The limits
265 * probably ought to change, however, depending on uniqueness.
271 /* ----------------------------------------------------------------------
272 * Minesweeper solver, used to ensure the generated grids are
273 * solvable without having to take risks.
277 * Count the bits in a word. Only needs to cope with 16 bits.
279 static int bitcount16(int inword)
281 unsigned int word = inword;
283 word = ((word & 0xAAAA) >> 1) + (word & 0x5555);
284 word = ((word & 0xCCCC) >> 2) + (word & 0x3333);
285 word = ((word & 0xF0F0) >> 4) + (word & 0x0F0F);
286 word = ((word & 0xFF00) >> 8) + (word & 0x00FF);
292 * We use a tree234 to store a large number of small localised
293 * sets, each with a mine count. We also keep some of those sets
294 * linked together into a to-do list.
297 short x, y, mask, mines;
299 struct set *prev, *next;
302 static int setcmp(void *av, void *bv)
304 struct set *a = (struct set *)av;
305 struct set *b = (struct set *)bv;
309 else if (a->y > b->y)
311 else if (a->x < b->x)
313 else if (a->x > b->x)
315 else if (a->mask < b->mask)
317 else if (a->mask > b->mask)
325 struct set *todo_head, *todo_tail;
328 static struct setstore *ss_new(void)
330 struct setstore *ss = snew(struct setstore);
331 ss->sets = newtree234(setcmp);
332 ss->todo_head = ss->todo_tail = NULL;
337 * Take two input sets, in the form (x,y,mask). Munge the first by
338 * taking either its intersection with the second or its difference
339 * with the second. Return the new mask part of the first set.
341 static int setmunge(int x1, int y1, int mask1, int x2, int y2, int mask2,
345 * Adjust the second set so that it has the same x,y
346 * coordinates as the first.
348 if (abs(x2-x1) >= 3 || abs(y2-y1) >= 3) {
352 mask2 &= ~(4|32|256);
362 mask2 &= ~(64|128|256);
374 * Invert the second set if `diff' is set (we're after A &~ B
375 * rather than A & B).
381 * Now all that's left is a logical AND.
383 return mask1 & mask2;
386 static void ss_add_todo(struct setstore *ss, struct set *s)
389 return; /* already on it */
391 #ifdef SOLVER_DIAGNOSTICS
392 printf("adding set on todo list: %d,%d %03x %d\n",
393 s->x, s->y, s->mask, s->mines);
396 s->prev = ss->todo_tail;
406 static void ss_add(struct setstore *ss, int x, int y, int mask, int mines)
413 * Normalise so that x and y are genuinely the bounding
416 while (!(mask & (1|8|64)))
418 while (!(mask & (1|2|4)))
422 * Create a set structure and add it to the tree.
424 s = snew(struct set);
430 if (add234(ss->sets, s) != s) {
432 * This set already existed! Free it and return.
439 * We've added a new set to the tree, so put it on the todo
445 static void ss_remove(struct setstore *ss, struct set *s)
447 struct set *next = s->next, *prev = s->prev;
449 #ifdef SOLVER_DIAGNOSTICS
450 printf("removing set %d,%d %03x\n", s->x, s->y, s->mask);
453 * Remove s from the todo list.
457 else if (s == ss->todo_head)
458 ss->todo_head = next;
462 else if (s == ss->todo_tail)
463 ss->todo_tail = prev;
468 * Remove s from the tree.
473 * Destroy the actual set structure.
479 * Return a dynamically allocated list of all the sets which
480 * overlap a provided input set.
482 static struct set **ss_overlap(struct setstore *ss, int x, int y, int mask)
484 struct set **ret = NULL;
485 int nret = 0, retsize = 0;
488 for (xx = x-3; xx < x+3; xx++)
489 for (yy = y-3; yy < y+3; yy++) {
494 * Find the first set with these top left coordinates.
500 if (findrelpos234(ss->sets, &stmp, NULL, REL234_GE, &pos)) {
501 while ((s = index234(ss->sets, pos)) != NULL &&
502 s->x == xx && s->y == yy) {
504 * This set potentially overlaps the input one.
505 * Compute the intersection to see if they
506 * really overlap, and add it to the list if
509 if (setmunge(x, y, mask, s->x, s->y, s->mask, FALSE)) {
511 * There's an overlap.
513 if (nret >= retsize) {
515 ret = sresize(ret, retsize, struct set *);
525 ret = sresize(ret, nret+1, struct set *);
532 * Get an element from the head of the set todo list.
534 static struct set *ss_todo(struct setstore *ss)
537 struct set *ret = ss->todo_head;
538 ss->todo_head = ret->next;
540 ss->todo_head->prev = NULL;
542 ss->todo_tail = NULL;
543 ret->next = ret->prev = NULL;
556 static void std_add(struct squaretodo *std, int i)
559 std->next[std->tail] = i;
566 typedef int (*open_cb)(void *, int, int);
568 static void known_squares(int w, int h, struct squaretodo *std,
570 open_cb open, void *openctx,
571 int x, int y, int mask, int mine)
577 for (yy = 0; yy < 3; yy++)
578 for (xx = 0; xx < 3; xx++) {
580 int i = (y + yy) * w + (x + xx);
583 * It's possible that this square is _already_
584 * known, in which case we don't try to add it to
590 grid[i] = -1; /* and don't open it! */
592 grid[i] = open(openctx, x + xx, y + yy);
593 assert(grid[i] != -1); /* *bang* */
604 * This is data returned from the `perturb' function. It details
605 * which squares have become mines and which have become clear. The
606 * solver is (of course) expected to honourably not use that
607 * knowledge directly, but to efficently adjust its internal data
608 * structures and proceed based on only the information it
611 struct perturbation {
613 int delta; /* +1 == become a mine; -1 == cleared */
615 struct perturbations {
617 struct perturbation *changes;
621 * Main solver entry point. You give it a grid of existing
622 * knowledge (-1 for a square known to be a mine, 0-8 for empty
623 * squares with a given number of neighbours, -2 for completely
624 * unknown), plus a function which you can call to open new squares
625 * once you're confident of them. It fills in as much more of the
630 * - -1 means deduction stalled and nothing could be done
631 * - 0 means deduction succeeded fully
632 * - >0 means deduction succeeded but some number of perturbation
633 * steps were required; the exact return value is the number of
637 typedef struct perturbations *(*perturb_cb) (void *, signed char *, int, int, int);
639 static int minesolve(int w, int h, int n, signed char *grid,
642 void *ctx, random_state *rs)
644 struct setstore *ss = ss_new();
646 struct squaretodo astd, *std = &astd;
651 * Set up a linked list of squares with known contents, so that
652 * we can process them one by one.
654 std->next = snewn(w*h, int);
655 std->head = std->tail = -1;
658 * Initialise that list with all known squares in the input
661 for (y = 0; y < h; y++) {
662 for (x = 0; x < w; x++) {
670 * Main deductive loop.
673 int done_something = FALSE;
677 * If there are any known squares on the todo list, process
678 * them and construct a set for each.
680 while (std->head != -1) {
682 #ifdef SOLVER_DIAGNOSTICS
683 printf("known square at %d,%d [%d]\n", i%w, i/w, grid[i]);
685 std->head = std->next[i];
693 int dx, dy, mines, bit, val;
694 #ifdef SOLVER_DIAGNOSTICS
695 printf("creating set around this square\n");
698 * Empty square. Construct the set of non-known squares
699 * around this one, and determine its mine count.
704 for (dy = -1; dy <= +1; dy++) {
705 for (dx = -1; dx <= +1; dx++) {
706 #ifdef SOLVER_DIAGNOSTICS
707 printf("grid %d,%d = %d\n", x+dx, y+dy, grid[i+dy*w+dx]);
709 if (x+dx < 0 || x+dx >= w || y+dy < 0 || y+dy >= h)
710 /* ignore this one */;
711 else if (grid[i+dy*w+dx] == -1)
713 else if (grid[i+dy*w+dx] == -2)
719 ss_add(ss, x-1, y-1, val, mines);
723 * Now, whether the square is empty or full, we must
724 * find any set which contains it and replace it with
725 * one which does not.
728 #ifdef SOLVER_DIAGNOSTICS
729 printf("finding sets containing known square %d,%d\n", x, y);
731 list = ss_overlap(ss, x, y, 1);
733 for (j = 0; list[j]; j++) {
734 int newmask, newmines;
739 * Compute the mask for this set minus the
740 * newly known square.
742 newmask = setmunge(s->x, s->y, s->mask, x, y, 1, TRUE);
745 * Compute the new mine count.
747 newmines = s->mines - (grid[i] == -1);
750 * Insert the new set into the collection,
751 * unless it's been whittled right down to
755 ss_add(ss, s->x, s->y, newmask, newmines);
758 * Destroy the old one; it is actually obsolete.
767 * Marking a fresh square as known certainly counts as
770 done_something = TRUE;
774 * Now pick a set off the to-do list and attempt deductions
777 if ((s = ss_todo(ss)) != NULL) {
779 #ifdef SOLVER_DIAGNOSTICS
780 printf("set to do: %d,%d %03x %d\n", s->x, s->y, s->mask, s->mines);
783 * Firstly, see if this set has a mine count of zero or
784 * of its own cardinality.
786 if (s->mines == 0 || s->mines == bitcount16(s->mask)) {
788 * If so, we can immediately mark all the squares
789 * in the set as known.
791 #ifdef SOLVER_DIAGNOSTICS
794 known_squares(w, h, std, grid, open, ctx,
795 s->x, s->y, s->mask, (s->mines != 0));
798 * Having done that, we need do nothing further
799 * with this set; marking all the squares in it as
800 * known will eventually eliminate it, and will
801 * also permit further deductions about anything
808 * Failing that, we now search through all the sets
809 * which overlap this one.
811 list = ss_overlap(ss, s->x, s->y, s->mask);
813 for (j = 0; list[j]; j++) {
814 struct set *s2 = list[j];
815 int swing, s2wing, swc, s2wc;
818 * Find the non-overlapping parts s2-s and s-s2,
819 * and their cardinalities.
821 * I'm going to refer to these parts as `wings'
822 * surrounding the central part common to both
823 * sets. The `s wing' is s-s2; the `s2 wing' is
826 swing = setmunge(s->x, s->y, s->mask, s2->x, s2->y, s2->mask,
828 s2wing = setmunge(s2->x, s2->y, s2->mask, s->x, s->y, s->mask,
830 swc = bitcount16(swing);
831 s2wc = bitcount16(s2wing);
834 * If one set has more mines than the other, and
835 * the number of extra mines is equal to the
836 * cardinality of that set's wing, then we can mark
837 * every square in the wing as a known mine, and
838 * every square in the other wing as known clear.
840 if (swc == s->mines - s2->mines ||
841 s2wc == s2->mines - s->mines) {
842 known_squares(w, h, std, grid, open, ctx,
844 (swc == s->mines - s2->mines));
845 known_squares(w, h, std, grid, open, ctx,
846 s2->x, s2->y, s2wing,
847 (s2wc == s2->mines - s->mines));
852 * Failing that, see if one set is a subset of the
853 * other. If so, we can divide up the mine count of
854 * the larger set between the smaller set and its
855 * complement, even if neither smaller set ends up
856 * being immediately clearable.
858 if (swc == 0 && s2wc != 0) {
859 /* s is a subset of s2. */
860 assert(s2->mines > s->mines);
861 ss_add(ss, s2->x, s2->y, s2wing, s2->mines - s->mines);
862 } else if (s2wc == 0 && swc != 0) {
863 /* s2 is a subset of s. */
864 assert(s->mines > s2->mines);
865 ss_add(ss, s->x, s->y, swing, s->mines - s2->mines);
872 * In this situation we have definitely done
873 * _something_, even if it's only reducing the size of
876 done_something = TRUE;
879 * We have nothing left on our todo list, which means
880 * all localised deductions have failed. Our next step
881 * is to resort to global deduction based on the total
882 * mine count. This is computationally expensive
883 * compared to any of the above deductions, which is
884 * why we only ever do it when all else fails, so that
885 * hopefully it won't have to happen too often.
887 * If you pass n<0 into this solver, that informs it
888 * that you do not know the total mine count, so it
889 * won't even attempt these deductions.
892 int minesleft, squaresleft;
893 int nsets, setused[10], cursor;
896 * Start by scanning the current grid state to work out
897 * how many unknown squares we still have, and how many
898 * mines are to be placed in them.
902 for (i = 0; i < w*h; i++) {
905 else if (grid[i] == -2)
909 #ifdef SOLVER_DIAGNOSTICS
910 printf("global deduction time: squaresleft=%d minesleft=%d\n",
911 squaresleft, minesleft);
912 for (y = 0; y < h; y++) {
913 for (x = 0; x < w; x++) {
929 * If there _are_ no unknown squares, we have actually
932 if (squaresleft == 0) {
933 assert(minesleft == 0);
938 * First really simple case: if there are no more mines
939 * left, or if there are exactly as many mines left as
940 * squares to play them in, then it's all easy.
942 if (minesleft == 0 || minesleft == squaresleft) {
943 for (i = 0; i < w*h; i++)
945 known_squares(w, h, std, grid, open, ctx,
946 i % w, i / w, 1, minesleft != 0);
947 continue; /* now go back to main deductive loop */
951 * Failing that, we have to do some _real_ work.
952 * Ideally what we do here is to try every single
953 * combination of the currently available sets, in an
954 * attempt to find a disjoint union (i.e. a set of
955 * squares with a known mine count between them) such
956 * that the remaining unknown squares _not_ contained
957 * in that union either contain no mines or are all
960 * Actually enumerating all 2^n possibilities will get
961 * a bit slow for large n, so I artificially cap this
962 * recursion at n=10 to avoid too much pain.
964 nsets = count234(ss->sets);
965 if (nsets <= lenof(setused)) {
967 * Doing this with actual recursive function calls
968 * would get fiddly because a load of local
969 * variables from this function would have to be
970 * passed down through the recursion. So instead
971 * I'm going to use a virtual recursion within this
972 * function. The way this works is:
974 * - we have an array `setused', such that
975 * setused[n] is 0 or 1 depending on whether set
976 * n is currently in the union we are
979 * - we have a value `cursor' which indicates how
980 * much of `setused' we have so far filled in.
981 * It's conceptually the recursion depth.
983 * We begin by setting `cursor' to zero. Then:
985 * - if cursor can advance, we advance it by one.
986 * We set the value in `setused' that it went
987 * past to 1 if that set is disjoint from
988 * anything else currently in `setused', or to 0
991 * - If cursor cannot advance because it has
992 * reached the end of the setused list, then we
993 * have a maximal disjoint union. Check to see
994 * whether its mine count has any useful
995 * properties. If so, mark all the squares not
996 * in the union as known and terminate.
998 * - If cursor has reached the end of setused and
999 * the algorithm _hasn't_ terminated, back
1000 * cursor up to the nearest 1, turn it into a 0
1001 * and advance cursor just past it.
1003 * - If we attempt to back up to the nearest 1 and
1004 * there isn't one at all, then we have gone
1005 * through all disjoint unions of sets in the
1006 * list and none of them has been helpful, so we
1009 struct set *sets[lenof(setused)];
1010 for (i = 0; i < nsets; i++)
1011 sets[i] = index234(ss->sets, i);
1016 if (cursor < nsets) {
1019 /* See if any existing set overlaps this one. */
1020 for (i = 0; i < cursor; i++)
1022 setmunge(sets[cursor]->x,
1025 sets[i]->x, sets[i]->y, sets[i]->mask,
1033 * We're adding this set to our union,
1034 * so adjust minesleft and squaresleft
1037 minesleft -= sets[cursor]->mines;
1038 squaresleft -= bitcount16(sets[cursor]->mask);
1041 setused[cursor++] = ok;
1043 #ifdef SOLVER_DIAGNOSTICS
1044 printf("trying a set combination with %d %d\n",
1045 squaresleft, minesleft);
1046 #endif /* SOLVER_DIAGNOSTICS */
1049 * We've reached the end. See if we've got
1050 * anything interesting.
1052 if (squaresleft > 0 &&
1053 (minesleft == 0 || minesleft == squaresleft)) {
1055 * We have! There is at least one
1056 * square not contained within the set
1057 * union we've just found, and we can
1058 * deduce that either all such squares
1059 * are mines or all are not (depending
1060 * on whether minesleft==0). So now all
1061 * we have to do is actually go through
1062 * the grid, find those squares, and
1065 for (i = 0; i < w*h; i++)
1066 if (grid[i] == -2) {
1070 for (j = 0; j < nsets; j++)
1072 setmunge(sets[j]->x, sets[j]->y,
1073 sets[j]->mask, x, y, 1,
1079 known_squares(w, h, std, grid,
1081 x, y, 1, minesleft != 0);
1084 done_something = TRUE;
1085 break; /* return to main deductive loop */
1089 * If we reach here, then this union hasn't
1090 * done us any good, so move on to the
1091 * next. Backtrack cursor to the nearest 1,
1092 * change it to a 0 and continue.
1094 while (--cursor >= 0 && !setused[cursor]);
1096 assert(setused[cursor]);
1099 * We're removing this set from our
1100 * union, so re-increment minesleft and
1103 minesleft += sets[cursor]->mines;
1104 squaresleft += bitcount16(sets[cursor]->mask);
1106 setused[cursor++] = 0;
1109 * We've backtracked all the way to the
1110 * start without finding a single 1,
1111 * which means that our virtual
1112 * recursion is complete and nothing
1127 #ifdef SOLVER_DIAGNOSTICS
1129 * Dump the current known state of the grid.
1131 printf("solver ran out of steam, ret=%d, grid:\n", nperturbs);
1132 for (y = 0; y < h; y++) {
1133 for (x = 0; x < w; x++) {
1134 int v = grid[y*w+x];
1150 for (i = 0; (s = index234(ss->sets, i)) != NULL; i++)
1151 printf("remaining set: %d,%d %03x %d\n", s->x, s->y, s->mask, s->mines);
1156 * Now we really are at our wits' end as far as solving
1157 * this grid goes. Our only remaining option is to call
1158 * a perturb function and ask it to modify the grid to
1162 struct perturbations *ret;
1168 * Choose a set at random from the current selection,
1169 * and ask the perturb function to either fill or empty
1172 * If we have no sets at all, we must give up.
1174 if (count234(ss->sets) == 0) {
1175 #ifdef SOLVER_DIAGNOSTICS
1176 printf("perturbing on entire unknown set\n");
1178 ret = perturb(ctx, grid, 0, 0, 0);
1180 s = index234(ss->sets, random_upto(rs, count234(ss->sets)));
1181 #ifdef SOLVER_DIAGNOSTICS
1182 printf("perturbing on set %d,%d %03x\n", s->x, s->y, s->mask);
1184 ret = perturb(ctx, grid, s->x, s->y, s->mask);
1188 assert(ret->n > 0); /* otherwise should have been NULL */
1191 * A number of squares have been fiddled with, and
1192 * the returned structure tells us which. Adjust
1193 * the mine count in any set which overlaps one of
1194 * those squares, and put them back on the to-do
1195 * list. Also, if the square itself is marked as a
1196 * known non-mine, put it back on the squares-to-do
1199 for (i = 0; i < ret->n; i++) {
1200 #ifdef SOLVER_DIAGNOSTICS
1201 printf("perturbation %s mine at %d,%d\n",
1202 ret->changes[i].delta > 0 ? "added" : "removed",
1203 ret->changes[i].x, ret->changes[i].y);
1206 if (ret->changes[i].delta < 0 &&
1207 grid[ret->changes[i].y*w+ret->changes[i].x] != -2) {
1208 std_add(std, ret->changes[i].y*w+ret->changes[i].x);
1211 list = ss_overlap(ss,
1212 ret->changes[i].x, ret->changes[i].y, 1);
1214 for (j = 0; list[j]; j++) {
1215 list[j]->mines += ret->changes[i].delta;
1216 ss_add_todo(ss, list[j]);
1223 * Now free the returned data.
1225 sfree(ret->changes);
1228 #ifdef SOLVER_DIAGNOSTICS
1230 * Dump the current known state of the grid.
1232 printf("state after perturbation:\n");
1233 for (y = 0; y < h; y++) {
1234 for (x = 0; x < w; x++) {
1235 int v = grid[y*w+x];
1251 for (i = 0; (s = index234(ss->sets, i)) != NULL; i++)
1252 printf("remaining set: %d,%d %03x %d\n", s->x, s->y, s->mask, s->mines);
1257 * And now we can go back round the deductive loop.
1264 * If we get here, even that didn't work (either we didn't
1265 * have a perturb function or it returned failure), so we
1272 * See if we've got any unknown squares left.
1274 for (y = 0; y < h; y++)
1275 for (x = 0; x < w; x++)
1276 if (grid[y*w+x] == -2) {
1277 nperturbs = -1; /* failed to complete */
1282 * Free the set list and square-todo list.
1286 while ((s = delpos234(ss->sets, 0)) != NULL)
1288 freetree234(ss->sets);
1296 /* ----------------------------------------------------------------------
1297 * Grid generator which uses the above solver.
1304 int allow_big_perturbs;
1308 static int mineopen(void *vctx, int x, int y)
1310 struct minectx *ctx = (struct minectx *)vctx;
1313 assert(x >= 0 && x < ctx->w && y >= 0 && y < ctx->h);
1314 if (ctx->grid[y * ctx->w + x])
1315 return -1; /* *bang* */
1318 for (i = -1; i <= +1; i++) {
1319 if (x + i < 0 || x + i >= ctx->w)
1321 for (j = -1; j <= +1; j++) {
1322 if (y + j < 0 || y + j >= ctx->h)
1324 if (i == 0 && j == 0)
1326 if (ctx->grid[(y+j) * ctx->w + (x+i)])
1334 /* Structure used internally to mineperturb(). */
1336 int x, y, type, random;
1338 static int squarecmp(const void *av, const void *bv)
1340 const struct square *a = (const struct square *)av;
1341 const struct square *b = (const struct square *)bv;
1342 if (a->type < b->type)
1344 else if (a->type > b->type)
1346 else if (a->random < b->random)
1348 else if (a->random > b->random)
1350 else if (a->y < b->y)
1352 else if (a->y > b->y)
1354 else if (a->x < b->x)
1356 else if (a->x > b->x)
1362 * Normally this function is passed an (x,y,mask) set description.
1363 * On occasions, though, there is no _localised_ set being used,
1364 * and the set being perturbed is supposed to be the entirety of
1365 * the unreachable area. This is signified by the special case
1366 * mask==0: in this case, anything labelled -2 in the grid is part
1369 * Allowing perturbation in this special case appears to make it
1370 * guaranteeably possible to generate a workable grid for any mine
1371 * density, but they tend to be a bit boring, with mines packed
1372 * densely into far corners of the grid and the remainder being
1373 * less dense than one might like. Therefore, to improve overall
1374 * grid quality I disable this feature for the first few attempts,
1375 * and fall back to it after no useful grid has been generated.
1377 static struct perturbations *mineperturb(void *vctx, signed char *grid,
1378 int setx, int sety, int mask)
1380 struct minectx *ctx = (struct minectx *)vctx;
1381 struct square *sqlist;
1382 int x, y, dx, dy, i, n, nfull, nempty;
1383 struct square **tofill, **toempty, **todo;
1384 int ntofill, ntoempty, ntodo, dtodo, dset;
1385 struct perturbations *ret;
1388 if (!mask && !ctx->allow_big_perturbs)
1392 * Make a list of all the squares in the grid which we can
1393 * possibly use. This list should be in preference order, which
1396 * - first, unknown squares on the boundary of known space
1397 * - next, unknown squares beyond that boundary
1398 * - as a very last resort, known squares, but not within one
1399 * square of the starting position.
1401 * Each of these sections needs to be shuffled independently.
1402 * We do this by preparing list of all squares and then sorting
1403 * it with a random secondary key.
1405 sqlist = snewn(ctx->w * ctx->h, struct square);
1407 for (y = 0; y < ctx->h; y++)
1408 for (x = 0; x < ctx->w; x++) {
1410 * If this square is too near the starting position,
1411 * don't put it on the list at all.
1413 if (abs(y - ctx->sy) <= 1 && abs(x - ctx->sx) <= 1)
1417 * If this square is in the input set, also don't put
1420 if ((mask == 0 && grid[y*ctx->w+x] == -2) ||
1421 (x >= setx && x < setx + 3 &&
1422 y >= sety && y < sety + 3 &&
1423 mask & (1 << ((y-sety)*3+(x-setx)))))
1429 if (grid[y*ctx->w+x] != -2) {
1430 sqlist[n].type = 3; /* known square */
1433 * Unknown square. Examine everything around it and
1434 * see if it borders on any known squares. If it
1435 * does, it's class 1, otherwise it's 2.
1440 for (dy = -1; dy <= +1; dy++)
1441 for (dx = -1; dx <= +1; dx++)
1442 if (x+dx >= 0 && x+dx < ctx->w &&
1443 y+dy >= 0 && y+dy < ctx->h &&
1444 grid[(y+dy)*ctx->w+(x+dx)] != -2) {
1451 * Finally, a random number to cause qsort to
1452 * shuffle within each group.
1454 sqlist[n].random = random_bits(ctx->rs, 31);
1459 qsort(sqlist, n, sizeof(struct square), squarecmp);
1462 * Now count up the number of full and empty squares in the set
1463 * we've been provided.
1467 for (dy = 0; dy < 3; dy++)
1468 for (dx = 0; dx < 3; dx++)
1469 if (mask & (1 << (dy*3+dx))) {
1470 assert(setx+dx <= ctx->w);
1471 assert(sety+dy <= ctx->h);
1472 if (ctx->grid[(sety+dy)*ctx->w+(setx+dx)])
1478 for (y = 0; y < ctx->h; y++)
1479 for (x = 0; x < ctx->w; x++)
1480 if (grid[y*ctx->w+x] == -2) {
1481 if (ctx->grid[y*ctx->w+x])
1489 * Now go through our sorted list until we find either `nfull'
1490 * empty squares, or `nempty' full squares; these will be
1491 * swapped with the appropriate squares in the set to either
1492 * fill or empty the set while keeping the same number of mines
1495 ntofill = ntoempty = 0;
1497 tofill = snewn(9, struct square *);
1498 toempty = snewn(9, struct square *);
1500 tofill = snewn(ctx->w * ctx->h, struct square *);
1501 toempty = snewn(ctx->w * ctx->h, struct square *);
1503 for (i = 0; i < n; i++) {
1504 struct square *sq = &sqlist[i];
1505 if (ctx->grid[sq->y * ctx->w + sq->x])
1506 toempty[ntoempty++] = sq;
1508 tofill[ntofill++] = sq;
1509 if (ntofill == nfull || ntoempty == nempty)
1514 * If we haven't found enough empty squares outside the set to
1515 * empty it into _or_ enough full squares outside it to fill it
1516 * up with, we'll have to settle for doing only a partial job.
1517 * In this case we choose to always _fill_ the set (because
1518 * this case will tend to crop up when we're working with very
1519 * high mine densities and the only way to get a solvable grid
1520 * is going to be to pack most of the mines solidly around the
1521 * edges). So now our job is to make a list of the empty
1522 * squares in the set, and shuffle that list so that we fill a
1523 * random selection of them.
1525 if (ntofill != nfull && ntoempty != nempty) {
1528 assert(ntoempty != 0);
1530 setlist = snewn(ctx->w * ctx->h, int);
1533 for (dy = 0; dy < 3; dy++)
1534 for (dx = 0; dx < 3; dx++)
1535 if (mask & (1 << (dy*3+dx))) {
1536 assert(setx+dx <= ctx->w);
1537 assert(sety+dy <= ctx->h);
1538 if (!ctx->grid[(sety+dy)*ctx->w+(setx+dx)])
1539 setlist[i++] = (sety+dy)*ctx->w+(setx+dx);
1542 for (y = 0; y < ctx->h; y++)
1543 for (x = 0; x < ctx->w; x++)
1544 if (grid[y*ctx->w+x] == -2) {
1545 if (!ctx->grid[y*ctx->w+x])
1546 setlist[i++] = y*ctx->w+x;
1549 assert(i > ntoempty);
1551 * Now pick `ntoempty' items at random from the list.
1553 for (k = 0; k < ntoempty; k++) {
1554 int index = k + random_upto(ctx->rs, i - k);
1558 setlist[k] = setlist[index];
1559 setlist[index] = tmp;
1565 * Now we're pretty much there. We need to either
1566 * (a) put a mine in each of the empty squares in the set, and
1567 * take one out of each square in `toempty'
1568 * (b) take a mine out of each of the full squares in the set,
1569 * and put one in each square in `tofill'
1570 * depending on which one we've found enough squares to do.
1572 * So we start by constructing our list of changes to return to
1573 * the solver, so that it can update its data structures
1574 * efficiently rather than having to rescan the whole grid.
1576 ret = snew(struct perturbations);
1577 if (ntofill == nfull) {
1585 * (We also fall into this case if we've constructed a
1595 ret->changes = snewn(ret->n, struct perturbation);
1596 for (i = 0; i < ntodo; i++) {
1597 ret->changes[i].x = todo[i]->x;
1598 ret->changes[i].y = todo[i]->y;
1599 ret->changes[i].delta = dtodo;
1601 /* now i == ntodo */
1604 assert(todo == toempty);
1605 for (j = 0; j < ntoempty; j++) {
1606 ret->changes[i].x = setlist[j] % ctx->w;
1607 ret->changes[i].y = setlist[j] / ctx->w;
1608 ret->changes[i].delta = dset;
1613 for (dy = 0; dy < 3; dy++)
1614 for (dx = 0; dx < 3; dx++)
1615 if (mask & (1 << (dy*3+dx))) {
1616 int currval = (ctx->grid[(sety+dy)*ctx->w+(setx+dx)] ? +1 : -1);
1617 if (dset == -currval) {
1618 ret->changes[i].x = setx + dx;
1619 ret->changes[i].y = sety + dy;
1620 ret->changes[i].delta = dset;
1625 for (y = 0; y < ctx->h; y++)
1626 for (x = 0; x < ctx->w; x++)
1627 if (grid[y*ctx->w+x] == -2) {
1628 int currval = (ctx->grid[y*ctx->w+x] ? +1 : -1);
1629 if (dset == -currval) {
1630 ret->changes[i].x = x;
1631 ret->changes[i].y = y;
1632 ret->changes[i].delta = dset;
1637 assert(i == ret->n);
1643 * Having set up the precise list of changes we're going to
1644 * make, we now simply make them and return.
1646 for (i = 0; i < ret->n; i++) {
1649 x = ret->changes[i].x;
1650 y = ret->changes[i].y;
1651 delta = ret->changes[i].delta;
1654 * Check we're not trying to add an existing mine or remove
1657 assert((delta < 0) ^ (ctx->grid[y*ctx->w+x] == 0));
1660 * Actually make the change.
1662 ctx->grid[y*ctx->w+x] = (delta > 0);
1665 * Update any numbers already present in the grid.
1667 for (dy = -1; dy <= +1; dy++)
1668 for (dx = -1; dx <= +1; dx++)
1669 if (x+dx >= 0 && x+dx < ctx->w &&
1670 y+dy >= 0 && y+dy < ctx->h &&
1671 grid[(y+dy)*ctx->w+(x+dx)] != -2) {
1672 if (dx == 0 && dy == 0) {
1674 * The square itself is marked as known in
1675 * the grid. Mark it as a mine if it's a
1676 * mine, or else work out its number.
1679 grid[y*ctx->w+x] = -1;
1681 int dx2, dy2, minecount = 0;
1682 for (dy2 = -1; dy2 <= +1; dy2++)
1683 for (dx2 = -1; dx2 <= +1; dx2++)
1684 if (x+dx2 >= 0 && x+dx2 < ctx->w &&
1685 y+dy2 >= 0 && y+dy2 < ctx->h &&
1686 ctx->grid[(y+dy2)*ctx->w+(x+dx2)])
1688 grid[y*ctx->w+x] = minecount;
1691 if (grid[(y+dy)*ctx->w+(x+dx)] >= 0)
1692 grid[(y+dy)*ctx->w+(x+dx)] += delta;
1697 #ifdef GENERATION_DIAGNOSTICS
1700 printf("grid after perturbing:\n");
1701 for (yy = 0; yy < ctx->h; yy++) {
1702 for (xx = 0; xx < ctx->w; xx++) {
1703 int v = ctx->grid[yy*ctx->w+xx];
1704 if (yy == ctx->sy && xx == ctx->sx) {
1722 static char *minegen(int w, int h, int n, int x, int y, int unique,
1725 char *ret = snewn(w*h, char);
1733 memset(ret, 0, w*h);
1736 * Start by placing n mines, none of which is at x,y or within
1740 int *tmp = snewn(w*h, int);
1744 * Write down the list of possible mine locations.
1747 for (i = 0; i < h; i++)
1748 for (j = 0; j < w; j++)
1749 if (abs(i - y) > 1 || abs(j - x) > 1)
1753 * Now pick n off the list at random.
1757 i = random_upto(rs, k);
1765 #ifdef GENERATION_DIAGNOSTICS
1768 printf("grid after initial generation:\n");
1769 for (yy = 0; yy < h; yy++) {
1770 for (xx = 0; xx < w; xx++) {
1771 int v = ret[yy*w+xx];
1772 if (yy == y && xx == x) {
1788 * Now set up a results grid to run the solver in, and a
1789 * context for the solver to open squares. Then run the solver
1790 * repeatedly; if the number of perturb steps ever goes up or
1791 * it ever returns -1, give up completely.
1793 * We bypass this bit if we're not after a unique grid.
1796 signed char *solvegrid = snewn(w*h, signed char);
1797 struct minectx actx, *ctx = &actx;
1798 int solveret, prevret = -2;
1806 ctx->allow_big_perturbs = (ntries > 100);
1809 memset(solvegrid, -2, w*h);
1810 solvegrid[y*w+x] = mineopen(ctx, x, y);
1811 assert(solvegrid[y*w+x] == 0); /* by deliberate arrangement */
1814 minesolve(w, h, n, solvegrid, mineopen, mineperturb, ctx, rs);
1815 if (solveret < 0 || (prevret >= 0 && solveret >= prevret)) {
1818 } else if (solveret == 0) {
1834 static char *describe_layout(char *grid, int area, int x, int y,
1842 * Set up the mine bitmap and obfuscate it.
1844 bmp = snewn((area + 7) / 8, unsigned char);
1845 memset(bmp, 0, (area + 7) / 8);
1846 for (i = 0; i < area; i++) {
1848 bmp[i / 8] |= 0x80 >> (i % 8);
1851 obfuscate_bitmap(bmp, area, FALSE);
1854 * Now encode the resulting bitmap in hex. We can work to
1855 * nibble rather than byte granularity, since the obfuscation
1856 * function guarantees to return a bit string of the same
1857 * length as its input.
1859 ret = snewn((area+3)/4 + 100, char);
1860 p = ret + sprintf(ret, "%d,%d,%s", x, y,
1861 obfuscate ? "m" : "u"); /* 'm' == masked */
1862 for (i = 0; i < (area+3)/4; i++) {
1866 *p++ = "0123456789abcdef"[v & 0xF];
1875 static char *new_mine_layout(int w, int h, int n, int x, int y, int unique,
1876 random_state *rs, char **game_desc)
1880 #ifdef TEST_OBFUSCATION
1881 static int tested_obfuscation = FALSE;
1882 if (!tested_obfuscation) {
1884 * A few simple test vectors for the obfuscator.
1886 * First test: the 28-bit stream 1234567. This divides up
1887 * into 1234 and 567[0]. The SHA of 56 70 30 (appending
1888 * "0") is 15ce8ab946640340bbb99f3f48fd2c45d1a31d30. Thus,
1889 * we XOR the 16-bit string 15CE into the input 1234 to get
1890 * 07FA. Next, we SHA that with "0": the SHA of 07 FA 30 is
1891 * 3370135c5e3da4fed937adc004a79533962b6391. So we XOR the
1892 * 12-bit string 337 into the input 567 to get 650. Thus
1893 * our output is 07FA650.
1896 unsigned char bmp1[] = "\x12\x34\x56\x70";
1897 obfuscate_bitmap(bmp1, 28, FALSE);
1898 printf("test 1 encode: %s\n",
1899 memcmp(bmp1, "\x07\xfa\x65\x00", 4) ? "failed" : "passed");
1900 obfuscate_bitmap(bmp1, 28, TRUE);
1901 printf("test 1 decode: %s\n",
1902 memcmp(bmp1, "\x12\x34\x56\x70", 4) ? "failed" : "passed");
1905 * Second test: a long string to make sure we switch from
1906 * one SHA to the next correctly. My input string this time
1907 * is simply fifty bytes of zeroes.
1910 unsigned char bmp2[50];
1911 unsigned char bmp2a[50];
1912 memset(bmp2, 0, 50);
1913 memset(bmp2a, 0, 50);
1914 obfuscate_bitmap(bmp2, 50 * 8, FALSE);
1916 * SHA of twenty-five zero bytes plus "0" is
1917 * b202c07b990c01f6ff2d544707f60e506019b671. SHA of
1918 * twenty-five zero bytes plus "1" is
1919 * fcb1d8b5a2f6b592fe6780b36aa9d65dd7aa6db9. Thus our
1920 * first half becomes
1921 * b202c07b990c01f6ff2d544707f60e506019b671fcb1d8b5a2.
1923 * SHA of that lot plus "0" is
1924 * 10b0af913db85d37ca27f52a9f78bba3a80030db. SHA of the
1925 * same string plus "1" is
1926 * 3d01d8df78e76d382b8106f480135a1bc751d725. So the
1927 * second half becomes
1928 * 10b0af913db85d37ca27f52a9f78bba3a80030db3d01d8df78.
1930 printf("test 2 encode: %s\n",
1931 memcmp(bmp2, "\xb2\x02\xc0\x7b\x99\x0c\x01\xf6\xff\x2d\x54"
1932 "\x47\x07\xf6\x0e\x50\x60\x19\xb6\x71\xfc\xb1\xd8"
1933 "\xb5\xa2\x10\xb0\xaf\x91\x3d\xb8\x5d\x37\xca\x27"
1934 "\xf5\x2a\x9f\x78\xbb\xa3\xa8\x00\x30\xdb\x3d\x01"
1935 "\xd8\xdf\x78", 50) ? "failed" : "passed");
1936 obfuscate_bitmap(bmp2, 50 * 8, TRUE);
1937 printf("test 2 decode: %s\n",
1938 memcmp(bmp2, bmp2a, 50) ? "failed" : "passed");
1943 grid = minegen(w, h, n, x, y, unique, rs);
1946 *game_desc = describe_layout(grid, w * h, x, y, TRUE);
1951 static char *new_game_desc(game_params *params, random_state *rs,
1952 char **aux, int interactive)
1955 * We generate the coordinates of an initial click even if they
1956 * aren't actually used. This has the effect of harmonising the
1957 * random number usage between interactive and batch use: if
1958 * you use `mines --generate' with an explicit random seed, you
1959 * should get exactly the same results as if you type the same
1960 * random seed into the interactive game and click in the same
1961 * initial location. (Of course you won't get the same grid if
1962 * you click in a _different_ initial location, but there's
1963 * nothing to be done about that.)
1965 int x = random_upto(rs, params->w);
1966 int y = random_upto(rs, params->h);
1970 * For batch-generated grids, pre-open one square.
1975 grid = new_mine_layout(params->w, params->h, params->n,
1976 x, y, params->unique, rs, &desc);
1980 char *rsdesc, *desc;
1982 rsdesc = random_state_encode(rs);
1983 desc = snewn(strlen(rsdesc) + 100, char);
1984 sprintf(desc, "r%d,%c,%s", params->n, (char)(params->unique ? 'u' : 'a'), rsdesc);
1990 static char *validate_desc(game_params *params, char *desc)
1992 int wh = params->w * params->h;
1997 if (!*desc || !isdigit((unsigned char)*desc))
1998 return "No initial mine count in game description";
1999 while (*desc && isdigit((unsigned char)*desc))
2000 desc++; /* skip over mine count */
2002 return "No ',' after initial x-coordinate in game description";
2004 if (*desc != 'u' && *desc != 'a')
2005 return "No uniqueness specifier in game description";
2008 return "No ',' after uniqueness specifier in game description";
2009 /* now ignore the rest */
2011 if (*desc && isdigit((unsigned char)*desc)) {
2013 if (x < 0 || x >= params->w)
2014 return "Initial x-coordinate was out of range";
2015 while (*desc && isdigit((unsigned char)*desc))
2016 desc++; /* skip over x coordinate */
2018 return "No ',' after initial x-coordinate in game description";
2019 desc++; /* eat comma */
2020 if (!*desc || !isdigit((unsigned char)*desc))
2021 return "No initial y-coordinate in game description";
2023 if (y < 0 || y >= params->h)
2024 return "Initial y-coordinate was out of range";
2025 while (*desc && isdigit((unsigned char)*desc))
2026 desc++; /* skip over y coordinate */
2028 return "No ',' after initial y-coordinate in game description";
2029 desc++; /* eat comma */
2031 /* eat `m' for `masked' or `u' for `unmasked', if present */
2032 if (*desc == 'm' || *desc == 'u')
2034 /* now just check length of remainder */
2035 if (strlen(desc) != (wh+3)/4)
2036 return "Game description is wrong length";
2042 static int open_square(game_state *state, int x, int y)
2044 int w = state->w, h = state->h;
2045 int xx, yy, nmines, ncovered;
2047 if (!state->layout->mines) {
2049 * We have a preliminary game in which the mine layout
2050 * hasn't been generated yet. Generate it based on the
2051 * initial click location.
2053 char *desc, *privdesc;
2054 state->layout->mines = new_mine_layout(w, h, state->layout->n,
2055 x, y, state->layout->unique,
2059 * Find the trailing substring of the game description
2060 * corresponding to just the mine layout; we will use this
2061 * as our second `private' game ID for serialisation.
2064 while (*privdesc && isdigit((unsigned char)*privdesc)) privdesc++;
2065 if (*privdesc == ',') privdesc++;
2066 while (*privdesc && isdigit((unsigned char)*privdesc)) privdesc++;
2067 if (*privdesc == ',') privdesc++;
2068 assert(*privdesc == 'm');
2069 midend_supersede_game_desc(state->layout->me, desc, privdesc);
2071 random_free(state->layout->rs);
2072 state->layout->rs = NULL;
2075 if (state->layout->mines[y*w+x]) {
2077 * The player has landed on a mine. Bad luck. Expose the
2078 * mine that killed them, but not the rest (in case they
2079 * want to Undo and carry on playing).
2082 state->grid[y*w+x] = 65;
2087 * Otherwise, the player has opened a safe square. Mark it to-do.
2089 state->grid[y*w+x] = -10; /* `todo' value internal to this func */
2092 * Now go through the grid finding all `todo' values and
2093 * opening them. Every time one of them turns out to have no
2094 * neighbouring mines, we add all its unopened neighbours to
2097 * FIXME: We really ought to be able to do this better than
2098 * using repeated N^2 scans of the grid.
2101 int done_something = FALSE;
2103 for (yy = 0; yy < h; yy++)
2104 for (xx = 0; xx < w; xx++)
2105 if (state->grid[yy*w+xx] == -10) {
2108 assert(!state->layout->mines[yy*w+xx]);
2112 for (dx = -1; dx <= +1; dx++)
2113 for (dy = -1; dy <= +1; dy++)
2114 if (xx+dx >= 0 && xx+dx < state->w &&
2115 yy+dy >= 0 && yy+dy < state->h &&
2116 state->layout->mines[(yy+dy)*w+(xx+dx)])
2119 state->grid[yy*w+xx] = v;
2122 for (dx = -1; dx <= +1; dx++)
2123 for (dy = -1; dy <= +1; dy++)
2124 if (xx+dx >= 0 && xx+dx < state->w &&
2125 yy+dy >= 0 && yy+dy < state->h &&
2126 state->grid[(yy+dy)*w+(xx+dx)] == -2)
2127 state->grid[(yy+dy)*w+(xx+dx)] = -10;
2130 done_something = TRUE;
2133 if (!done_something)
2138 * Finally, scan the grid and see if exactly as many squares
2139 * are still covered as there are mines. If so, set the `won'
2140 * flag and fill in mine markers on all covered squares.
2142 nmines = ncovered = 0;
2143 for (yy = 0; yy < h; yy++)
2144 for (xx = 0; xx < w; xx++) {
2145 if (state->grid[yy*w+xx] < 0)
2147 if (state->layout->mines[yy*w+xx])
2150 assert(ncovered >= nmines);
2151 if (ncovered == nmines) {
2152 for (yy = 0; yy < h; yy++)
2153 for (xx = 0; xx < w; xx++) {
2154 if (state->grid[yy*w+xx] < 0)
2155 state->grid[yy*w+xx] = -1;
2163 static game_state *new_game(midend *me, game_params *params, char *desc)
2165 game_state *state = snew(game_state);
2166 int i, wh, x, y, ret, masked;
2169 state->w = params->w;
2170 state->h = params->h;
2171 state->n = params->n;
2172 state->dead = state->won = FALSE;
2173 state->used_solve = FALSE;
2175 wh = state->w * state->h;
2177 state->layout = snew(struct mine_layout);
2178 memset(state->layout, 0, sizeof(struct mine_layout));
2179 state->layout->refcount = 1;
2181 state->grid = snewn(wh, signed char);
2182 memset(state->grid, -2, wh);
2186 state->layout->n = atoi(desc);
2187 while (*desc && isdigit((unsigned char)*desc))
2188 desc++; /* skip over mine count */
2189 if (*desc) desc++; /* eat comma */
2191 state->layout->unique = FALSE;
2193 state->layout->unique = TRUE;
2195 if (*desc) desc++; /* eat comma */
2197 state->layout->mines = NULL;
2198 state->layout->rs = random_state_decode(desc);
2199 state->layout->me = me;
2202 state->layout->rs = NULL;
2203 state->layout->me = NULL;
2204 state->layout->mines = snewn(wh, char);
2206 if (*desc && isdigit((unsigned char)*desc)) {
2208 while (*desc && isdigit((unsigned char)*desc))
2209 desc++; /* skip over x coordinate */
2210 if (*desc) desc++; /* eat comma */
2212 while (*desc && isdigit((unsigned char)*desc))
2213 desc++; /* skip over y coordinate */
2214 if (*desc) desc++; /* eat comma */
2226 * We permit game IDs to be entered by hand without the
2227 * masking transformation.
2232 bmp = snewn((wh + 7) / 8, unsigned char);
2233 memset(bmp, 0, (wh + 7) / 8);
2234 for (i = 0; i < (wh+3)/4; i++) {
2238 assert(c != 0); /* validate_desc should have caught */
2239 if (c >= '0' && c <= '9')
2241 else if (c >= 'a' && c <= 'f')
2243 else if (c >= 'A' && c <= 'F')
2248 bmp[i / 2] |= v << (4 * (1 - (i % 2)));
2252 obfuscate_bitmap(bmp, wh, TRUE);
2254 memset(state->layout->mines, 0, wh);
2255 for (i = 0; i < wh; i++) {
2256 if (bmp[i / 8] & (0x80 >> (i % 8)))
2257 state->layout->mines[i] = 1;
2260 if (x >= 0 && y >= 0)
2261 ret = open_square(state, x, y);
2268 static game_state *dup_game(game_state *state)
2270 game_state *ret = snew(game_state);
2275 ret->dead = state->dead;
2276 ret->won = state->won;
2277 ret->used_solve = state->used_solve;
2278 ret->layout = state->layout;
2279 ret->layout->refcount++;
2280 ret->grid = snewn(ret->w * ret->h, signed char);
2281 memcpy(ret->grid, state->grid, ret->w * ret->h);
2286 static void free_game(game_state *state)
2288 if (--state->layout->refcount <= 0) {
2289 sfree(state->layout->mines);
2290 if (state->layout->rs)
2291 random_free(state->layout->rs);
2292 sfree(state->layout);
2298 static char *solve_game(game_state *state, game_state *currstate,
2299 char *aux, char **error)
2301 if (!state->layout->mines) {
2302 *error = "Game has not been started yet";
2309 static char *game_text_format(game_state *state)
2314 ret = snewn((state->w + 1) * state->h + 1, char);
2315 for (y = 0; y < state->h; y++) {
2316 for (x = 0; x < state->w; x++) {
2317 int v = state->grid[y*state->w+x];
2320 else if (v >= 1 && v <= 8)
2324 else if (v == -2 || v == -3)
2328 ret[y * (state->w+1) + x] = v;
2330 ret[y * (state->w+1) + state->w] = '\n';
2332 ret[(state->w + 1) * state->h] = '\0';
2338 int hx, hy, hradius; /* for mouse-down highlights */
2341 int deaths, completed;
2344 static game_ui *new_ui(game_state *state)
2346 game_ui *ui = snew(game_ui);
2347 ui->hx = ui->hy = -1;
2348 ui->hradius = ui->validradius = 0;
2350 ui->completed = FALSE;
2351 ui->flash_is_death = FALSE; /* *shrug* */
2355 static void free_ui(game_ui *ui)
2360 static char *encode_ui(game_ui *ui)
2364 * The deaths counter and completion status need preserving
2365 * across a serialisation.
2367 sprintf(buf, "D%d", ui->deaths);
2373 static void decode_ui(game_ui *ui, char *encoding)
2376 sscanf(encoding, "D%d%n", &ui->deaths, &p);
2377 if (encoding[p] == 'C')
2378 ui->completed = TRUE;
2381 static void game_changed_state(game_ui *ui, game_state *oldstate,
2382 game_state *newstate)
2385 ui->completed = TRUE;
2388 struct game_drawstate {
2389 int w, h, started, tilesize, bg;
2392 * Items in this `grid' array have all the same values as in
2393 * the game_state grid, and in addition:
2395 * - -10 means the tile was drawn `specially' as a result of a
2396 * flash, so it will always need redrawing.
2398 * - -22 and -23 mean the tile is highlighted for a possible
2403 static char *interpret_move(game_state *from, game_ui *ui, game_drawstate *ds,
2404 int x, int y, int button)
2409 if (from->dead || from->won)
2410 return NULL; /* no further moves permitted */
2412 if (!IS_MOUSE_DOWN(button) && !IS_MOUSE_DRAG(button) &&
2413 !IS_MOUSE_RELEASE(button))
2419 if (button == LEFT_BUTTON || button == LEFT_DRAG ||
2420 button == MIDDLE_BUTTON || button == MIDDLE_DRAG) {
2421 if (cx < 0 || cx >= from->w || cy < 0 || cy >= from->h)
2425 * Mouse-downs and mouse-drags just cause highlighting
2430 ui->hradius = (from->grid[cy*from->w+cx] >= 0 ? 1 : 0);
2431 if (button == LEFT_BUTTON)
2432 ui->validradius = ui->hradius;
2433 else if (button == MIDDLE_BUTTON)
2434 ui->validradius = 1;
2438 if (button == RIGHT_BUTTON) {
2439 if (cx < 0 || cx >= from->w || cy < 0 || cy >= from->h)
2443 * Right-clicking only works on a covered square, and it
2444 * toggles between -1 (marked as mine) and -2 (not marked
2447 * FIXME: question marks.
2449 if (from->grid[cy * from->w + cx] != -2 &&
2450 from->grid[cy * from->w + cx] != -1)
2453 sprintf(buf, "F%d,%d", cx, cy);
2457 if (button == LEFT_RELEASE || button == MIDDLE_RELEASE) {
2458 ui->hx = ui->hy = -1;
2462 * At this stage we must never return NULL: we have adjusted
2463 * the ui, so at worst we return "".
2465 if (cx < 0 || cx >= from->w || cy < 0 || cy >= from->h)
2469 * Left-clicking on a covered square opens a tile. Not
2470 * permitted if the tile is marked as a mine, for safety.
2471 * (Unmark it and _then_ open it.)
2473 if (button == LEFT_RELEASE &&
2474 (from->grid[cy * from->w + cx] == -2 ||
2475 from->grid[cy * from->w + cx] == -3) &&
2476 ui->validradius == 0) {
2477 /* Check if you've killed yourself. */
2478 if (from->layout->mines && from->layout->mines[cy * from->w + cx])
2481 sprintf(buf, "O%d,%d", cx, cy);
2486 * Left-clicking or middle-clicking on an uncovered tile:
2487 * first we check to see if the number of mine markers
2488 * surrounding the tile is equal to its mine count, and if
2489 * so then we open all other surrounding squares.
2491 if (from->grid[cy * from->w + cx] > 0 && ui->validradius == 1) {
2494 /* Count mine markers. */
2496 for (dy = -1; dy <= +1; dy++)
2497 for (dx = -1; dx <= +1; dx++)
2498 if (cx+dx >= 0 && cx+dx < from->w &&
2499 cy+dy >= 0 && cy+dy < from->h) {
2500 if (from->grid[(cy+dy)*from->w+(cx+dx)] == -1)
2504 if (n == from->grid[cy * from->w + cx]) {
2507 * Now see if any of the squares we're clearing
2508 * contains a mine (which will happen iff you've
2509 * incorrectly marked the mines around the clicked
2510 * square). If so, we open _just_ those squares, to
2511 * reveal as little additional information as we
2517 for (dy = -1; dy <= +1; dy++)
2518 for (dx = -1; dx <= +1; dx++)
2519 if (cx+dx >= 0 && cx+dx < from->w &&
2520 cy+dy >= 0 && cy+dy < from->h) {
2521 if (from->grid[(cy+dy)*from->w+(cx+dx)] != -1 &&
2522 from->layout->mines &&
2523 from->layout->mines[(cy+dy)*from->w+(cx+dx)]) {
2524 p += sprintf(p, "%sO%d,%d", sep, cx+dx, cy+dy);
2532 sprintf(buf, "C%d,%d", cx, cy);
2545 static game_state *execute_move(game_state *from, char *move)
2550 if (!strcmp(move, "S")) {
2552 * Simply expose the entire grid as if it were a completed
2557 ret = dup_game(from);
2558 for (yy = 0; yy < ret->h; yy++)
2559 for (xx = 0; xx < ret->w; xx++) {
2561 if (ret->layout->mines[yy*ret->w+xx]) {
2562 ret->grid[yy*ret->w+xx] = -1;
2568 for (dx = -1; dx <= +1; dx++)
2569 for (dy = -1; dy <= +1; dy++)
2570 if (xx+dx >= 0 && xx+dx < ret->w &&
2571 yy+dy >= 0 && yy+dy < ret->h &&
2572 ret->layout->mines[(yy+dy)*ret->w+(xx+dx)])
2575 ret->grid[yy*ret->w+xx] = v;
2578 ret->used_solve = TRUE;
2583 ret = dup_game(from);
2586 if (move[0] == 'F' &&
2587 sscanf(move+1, "%d,%d", &cx, &cy) == 2 &&
2588 cx >= 0 && cx < from->w && cy >= 0 && cy < from->h) {
2589 ret->grid[cy * from->w + cx] ^= (-2 ^ -1);
2590 } else if (move[0] == 'O' &&
2591 sscanf(move+1, "%d,%d", &cx, &cy) == 2 &&
2592 cx >= 0 && cx < from->w && cy >= 0 && cy < from->h) {
2593 open_square(ret, cx, cy);
2594 } else if (move[0] == 'C' &&
2595 sscanf(move+1, "%d,%d", &cx, &cy) == 2 &&
2596 cx >= 0 && cx < from->w && cy >= 0 && cy < from->h) {
2599 for (dy = -1; dy <= +1; dy++)
2600 for (dx = -1; dx <= +1; dx++)
2601 if (cx+dx >= 0 && cx+dx < ret->w &&
2602 cy+dy >= 0 && cy+dy < ret->h &&
2603 (ret->grid[(cy+dy)*ret->w+(cx+dx)] == -2 ||
2604 ret->grid[(cy+dy)*ret->w+(cx+dx)] == -3))
2605 open_square(ret, cx+dx, cy+dy);
2611 while (*move && *move != ';') move++;
2619 /* ----------------------------------------------------------------------
2623 static void game_compute_size(game_params *params, int tilesize,
2626 /* Ick: fake up `ds->tilesize' for macro expansion purposes */
2627 struct { int tilesize; } ads, *ds = &ads;
2628 ads.tilesize = tilesize;
2630 *x = BORDER * 2 + TILE_SIZE * params->w;
2631 *y = BORDER * 2 + TILE_SIZE * params->h;
2634 static void game_set_size(drawing *dr, game_drawstate *ds,
2635 game_params *params, int tilesize)
2637 ds->tilesize = tilesize;
2640 static float *game_colours(frontend *fe, int *ncolours)
2642 float *ret = snewn(3 * NCOLOURS, float);
2644 frontend_default_colour(fe, &ret[COL_BACKGROUND * 3]);
2646 ret[COL_BACKGROUND2 * 3 + 0] = ret[COL_BACKGROUND * 3 + 0] * 19.0 / 20.0;
2647 ret[COL_BACKGROUND2 * 3 + 1] = ret[COL_BACKGROUND * 3 + 1] * 19.0 / 20.0;
2648 ret[COL_BACKGROUND2 * 3 + 2] = ret[COL_BACKGROUND * 3 + 2] * 19.0 / 20.0;
2650 ret[COL_1 * 3 + 0] = 0.0F;
2651 ret[COL_1 * 3 + 1] = 0.0F;
2652 ret[COL_1 * 3 + 2] = 1.0F;
2654 ret[COL_2 * 3 + 0] = 0.0F;
2655 ret[COL_2 * 3 + 1] = 0.5F;
2656 ret[COL_2 * 3 + 2] = 0.0F;
2658 ret[COL_3 * 3 + 0] = 1.0F;
2659 ret[COL_3 * 3 + 1] = 0.0F;
2660 ret[COL_3 * 3 + 2] = 0.0F;
2662 ret[COL_4 * 3 + 0] = 0.0F;
2663 ret[COL_4 * 3 + 1] = 0.0F;
2664 ret[COL_4 * 3 + 2] = 0.5F;
2666 ret[COL_5 * 3 + 0] = 0.5F;
2667 ret[COL_5 * 3 + 1] = 0.0F;
2668 ret[COL_5 * 3 + 2] = 0.0F;
2670 ret[COL_6 * 3 + 0] = 0.0F;
2671 ret[COL_6 * 3 + 1] = 0.5F;
2672 ret[COL_6 * 3 + 2] = 0.5F;
2674 ret[COL_7 * 3 + 0] = 0.0F;
2675 ret[COL_7 * 3 + 1] = 0.0F;
2676 ret[COL_7 * 3 + 2] = 0.0F;
2678 ret[COL_8 * 3 + 0] = 0.5F;
2679 ret[COL_8 * 3 + 1] = 0.5F;
2680 ret[COL_8 * 3 + 2] = 0.5F;
2682 ret[COL_MINE * 3 + 0] = 0.0F;
2683 ret[COL_MINE * 3 + 1] = 0.0F;
2684 ret[COL_MINE * 3 + 2] = 0.0F;
2686 ret[COL_BANG * 3 + 0] = 1.0F;
2687 ret[COL_BANG * 3 + 1] = 0.0F;
2688 ret[COL_BANG * 3 + 2] = 0.0F;
2690 ret[COL_CROSS * 3 + 0] = 1.0F;
2691 ret[COL_CROSS * 3 + 1] = 0.0F;
2692 ret[COL_CROSS * 3 + 2] = 0.0F;
2694 ret[COL_FLAG * 3 + 0] = 1.0F;
2695 ret[COL_FLAG * 3 + 1] = 0.0F;
2696 ret[COL_FLAG * 3 + 2] = 0.0F;
2698 ret[COL_FLAGBASE * 3 + 0] = 0.0F;
2699 ret[COL_FLAGBASE * 3 + 1] = 0.0F;
2700 ret[COL_FLAGBASE * 3 + 2] = 0.0F;
2702 ret[COL_QUERY * 3 + 0] = 0.0F;
2703 ret[COL_QUERY * 3 + 1] = 0.0F;
2704 ret[COL_QUERY * 3 + 2] = 0.0F;
2706 ret[COL_HIGHLIGHT * 3 + 0] = 1.0F;
2707 ret[COL_HIGHLIGHT * 3 + 1] = 1.0F;
2708 ret[COL_HIGHLIGHT * 3 + 2] = 1.0F;
2710 ret[COL_LOWLIGHT * 3 + 0] = ret[COL_BACKGROUND * 3 + 0] * 2.0 / 3.0;
2711 ret[COL_LOWLIGHT * 3 + 1] = ret[COL_BACKGROUND * 3 + 1] * 2.0 / 3.0;
2712 ret[COL_LOWLIGHT * 3 + 2] = ret[COL_BACKGROUND * 3 + 2] * 2.0 / 3.0;
2714 ret[COL_WRONGNUMBER * 3 + 0] = 1.0F;
2715 ret[COL_WRONGNUMBER * 3 + 1] = 0.6F;
2716 ret[COL_WRONGNUMBER * 3 + 2] = 0.6F;
2718 *ncolours = NCOLOURS;
2722 static game_drawstate *game_new_drawstate(drawing *dr, game_state *state)
2724 struct game_drawstate *ds = snew(struct game_drawstate);
2728 ds->started = FALSE;
2729 ds->tilesize = 0; /* not decided yet */
2730 ds->grid = snewn(ds->w * ds->h, signed char);
2733 memset(ds->grid, -99, ds->w * ds->h);
2738 static void game_free_drawstate(drawing *dr, game_drawstate *ds)
2744 static void draw_tile(drawing *dr, game_drawstate *ds,
2745 int x, int y, int v, int bg)
2751 if (v == -22 || v == -23) {
2755 * Omit the highlights in this case.
2757 draw_rect(dr, x, y, TILE_SIZE, TILE_SIZE,
2758 bg == COL_BACKGROUND ? COL_BACKGROUND2 : bg);
2759 draw_line(dr, x, y, x + TILE_SIZE - 1, y, COL_LOWLIGHT);
2760 draw_line(dr, x, y, x, y + TILE_SIZE - 1, COL_LOWLIGHT);
2763 * Draw highlights to indicate the square is covered.
2765 coords[0] = x + TILE_SIZE - 1;
2766 coords[1] = y + TILE_SIZE - 1;
2767 coords[2] = x + TILE_SIZE - 1;
2770 coords[5] = y + TILE_SIZE - 1;
2771 draw_polygon(dr, coords, 3, COL_LOWLIGHT ^ hl, COL_LOWLIGHT ^ hl);
2775 draw_polygon(dr, coords, 3, COL_HIGHLIGHT ^ hl,
2776 COL_HIGHLIGHT ^ hl);
2778 draw_rect(dr, x + HIGHLIGHT_WIDTH, y + HIGHLIGHT_WIDTH,
2779 TILE_SIZE - 2*HIGHLIGHT_WIDTH, TILE_SIZE - 2*HIGHLIGHT_WIDTH,
2787 #define SETCOORD(n, dx, dy) do { \
2788 coords[(n)*2+0] = x + TILE_SIZE * (dx); \
2789 coords[(n)*2+1] = y + TILE_SIZE * (dy); \
2791 SETCOORD(0, 0.6, 0.35);
2792 SETCOORD(1, 0.6, 0.7);
2793 SETCOORD(2, 0.8, 0.8);
2794 SETCOORD(3, 0.25, 0.8);
2795 SETCOORD(4, 0.55, 0.7);
2796 SETCOORD(5, 0.55, 0.35);
2797 draw_polygon(dr, coords, 6, COL_FLAGBASE, COL_FLAGBASE);
2799 SETCOORD(0, 0.6, 0.2);
2800 SETCOORD(1, 0.6, 0.5);
2801 SETCOORD(2, 0.2, 0.35);
2802 draw_polygon(dr, coords, 3, COL_FLAG, COL_FLAG);
2805 } else if (v == -3) {
2807 * Draw a question mark.
2809 draw_text(dr, x + TILE_SIZE / 2, y + TILE_SIZE / 2,
2810 FONT_VARIABLE, TILE_SIZE * 6 / 8,
2811 ALIGN_VCENTRE | ALIGN_HCENTRE,
2816 * Clear the square to the background colour, and draw thin
2817 * grid lines along the top and left.
2819 * Exception is that for value 65 (mine we've just trodden
2820 * on), we clear the square to COL_BANG.
2823 bg = COL_WRONGNUMBER;
2826 draw_rect(dr, x, y, TILE_SIZE, TILE_SIZE,
2827 (v == 65 ? COL_BANG :
2828 bg == COL_BACKGROUND ? COL_BACKGROUND2 : bg));
2829 draw_line(dr, x, y, x + TILE_SIZE - 1, y, COL_LOWLIGHT);
2830 draw_line(dr, x, y, x, y + TILE_SIZE - 1, COL_LOWLIGHT);
2832 if (v > 0 && v <= 8) {
2839 draw_text(dr, x + TILE_SIZE / 2, y + TILE_SIZE / 2,
2840 FONT_VARIABLE, TILE_SIZE * 7 / 8,
2841 ALIGN_VCENTRE | ALIGN_HCENTRE,
2842 (COL_1 - 1) + v, str);
2844 } else if (v >= 64) {
2848 * FIXME: this could be done better!
2851 draw_text(dr, x + TILE_SIZE / 2, y + TILE_SIZE / 2,
2852 FONT_VARIABLE, TILE_SIZE * 7 / 8,
2853 ALIGN_VCENTRE | ALIGN_HCENTRE,
2857 int cx = x + TILE_SIZE / 2;
2858 int cy = y + TILE_SIZE / 2;
2859 int r = TILE_SIZE / 2 - 3;
2861 int xdx = 1, xdy = 0, ydx = 0, ydy = 1;
2864 for (i = 0; i < 4*5*2; i += 5*2) {
2865 coords[i+2*0+0] = cx - r/6*xdx + r*4/5*ydx;
2866 coords[i+2*0+1] = cy - r/6*xdy + r*4/5*ydy;
2867 coords[i+2*1+0] = cx - r/6*xdx + r*ydx;
2868 coords[i+2*1+1] = cy - r/6*xdy + r*ydy;
2869 coords[i+2*2+0] = cx + r/6*xdx + r*ydx;
2870 coords[i+2*2+1] = cy + r/6*xdy + r*ydy;
2871 coords[i+2*3+0] = cx + r/6*xdx + r*4/5*ydx;
2872 coords[i+2*3+1] = cy + r/6*xdy + r*4/5*ydy;
2873 coords[i+2*4+0] = cx + r*3/5*xdx + r*3/5*ydx;
2874 coords[i+2*4+1] = cy + r*3/5*xdy + r*3/5*ydy;
2884 draw_polygon(dr, coords, 5*4, COL_MINE, COL_MINE);
2886 draw_rect(dr, cx-r/3, cy-r/3, r/3, r/4, COL_HIGHLIGHT);
2892 * Cross through the mine.
2895 for (dx = -1; dx <= +1; dx++) {
2896 draw_line(dr, x + 3 + dx, y + 2,
2897 x + TILE_SIZE - 3 + dx,
2898 y + TILE_SIZE - 2, COL_CROSS);
2899 draw_line(dr, x + TILE_SIZE - 3 + dx, y + 2,
2900 x + 3 + dx, y + TILE_SIZE - 2,
2907 draw_update(dr, x, y, TILE_SIZE, TILE_SIZE);
2910 static void game_redraw(drawing *dr, game_drawstate *ds, game_state *oldstate,
2911 game_state *state, int dir, game_ui *ui,
2912 float animtime, float flashtime)
2915 int mines, markers, bg;
2918 int frame = (flashtime / FLASH_FRAME);
2920 bg = (ui->flash_is_death ? COL_BACKGROUND : COL_LOWLIGHT);
2922 bg = (ui->flash_is_death ? COL_BANG : COL_HIGHLIGHT);
2924 bg = COL_BACKGROUND;
2930 TILE_SIZE * state->w + 2 * BORDER,
2931 TILE_SIZE * state->h + 2 * BORDER, COL_BACKGROUND);
2932 draw_update(dr, 0, 0,
2933 TILE_SIZE * state->w + 2 * BORDER,
2934 TILE_SIZE * state->h + 2 * BORDER);
2937 * Recessed area containing the whole puzzle.
2939 coords[0] = COORD(state->w) + OUTER_HIGHLIGHT_WIDTH - 1;
2940 coords[1] = COORD(state->h) + OUTER_HIGHLIGHT_WIDTH - 1;
2941 coords[2] = COORD(state->w) + OUTER_HIGHLIGHT_WIDTH - 1;
2942 coords[3] = COORD(0) - OUTER_HIGHLIGHT_WIDTH;
2943 coords[4] = coords[2] - TILE_SIZE;
2944 coords[5] = coords[3] + TILE_SIZE;
2945 coords[8] = COORD(0) - OUTER_HIGHLIGHT_WIDTH;
2946 coords[9] = COORD(state->h) + OUTER_HIGHLIGHT_WIDTH - 1;
2947 coords[6] = coords[8] + TILE_SIZE;
2948 coords[7] = coords[9] - TILE_SIZE;
2949 draw_polygon(dr, coords, 5, COL_HIGHLIGHT, COL_HIGHLIGHT);
2951 coords[1] = COORD(0) - OUTER_HIGHLIGHT_WIDTH;
2952 coords[0] = COORD(0) - OUTER_HIGHLIGHT_WIDTH;
2953 draw_polygon(dr, coords, 5, COL_LOWLIGHT, COL_LOWLIGHT);
2959 * Now draw the tiles. Also in this loop, count up the number
2960 * of mines and mine markers.
2962 mines = markers = 0;
2963 for (y = 0; y < ds->h; y++)
2964 for (x = 0; x < ds->w; x++) {
2965 int v = state->grid[y*ds->w+x];
2969 if (state->layout->mines && state->layout->mines[y*ds->w+x])
2972 if (v >= 0 && v <= 8) {
2974 * Count up the flags around this tile, and if
2975 * there are too _many_, highlight the tile.
2977 int dx, dy, flags = 0;
2979 for (dy = -1; dy <= +1; dy++)
2980 for (dx = -1; dx <= +1; dx++) {
2981 int nx = x+dx, ny = y+dy;
2982 if (nx >= 0 && nx < ds->w &&
2983 ny >= 0 && ny < ds->h &&
2984 state->grid[ny*ds->w+nx] == -1)
2992 if ((v == -2 || v == -3) &&
2993 (abs(x-ui->hx) <= ui->hradius && abs(y-ui->hy) <= ui->hradius))
2996 if (ds->grid[y*ds->w+x] != v || bg != ds->bg) {
2997 draw_tile(dr, ds, COORD(x), COORD(y), v, bg);
2998 ds->grid[y*ds->w+x] = v;
3003 if (!state->layout->mines)
3004 mines = state->layout->n;
3007 * Update the status bar.
3010 char statusbar[512];
3012 sprintf(statusbar, "DEAD!");
3013 } else if (state->won) {
3014 if (state->used_solve)
3015 sprintf(statusbar, "Auto-solved.");
3017 sprintf(statusbar, "COMPLETED!");
3019 sprintf(statusbar, "Marked: %d / %d", markers, mines);
3022 sprintf(statusbar + strlen(statusbar),
3023 " Deaths: %d", ui->deaths);
3024 status_bar(dr, statusbar);
3028 static float game_anim_length(game_state *oldstate, game_state *newstate,
3029 int dir, game_ui *ui)
3034 static float game_flash_length(game_state *oldstate, game_state *newstate,
3035 int dir, game_ui *ui)
3037 if (oldstate->used_solve || newstate->used_solve)
3040 if (dir > 0 && !oldstate->dead && !oldstate->won) {
3041 if (newstate->dead) {
3042 ui->flash_is_death = TRUE;
3043 return 3 * FLASH_FRAME;
3045 if (newstate->won) {
3046 ui->flash_is_death = FALSE;
3047 return 2 * FLASH_FRAME;
3053 static int game_timing_state(game_state *state, game_ui *ui)
3055 if (state->dead || state->won || ui->completed || !state->layout->mines)
3060 static void game_print_size(game_params *params, float *x, float *y)
3064 static void game_print(drawing *dr, game_state *state, int tilesize)
3069 #define thegame mines
3072 const struct game thegame = {
3073 "Mines", "games.mines",
3080 TRUE, game_configure, custom_params,
3088 TRUE, game_text_format,
3096 PREFERRED_TILE_SIZE, game_compute_size, game_set_size,
3099 game_free_drawstate,
3103 FALSE, FALSE, game_print_size, game_print,
3104 TRUE, /* wants_statusbar */
3105 TRUE, game_timing_state,
3106 BUTTON_BEATS(LEFT_BUTTON, RIGHT_BUTTON),
3109 #ifdef STANDALONE_OBFUSCATOR
3112 * Vaguely useful stand-alone program which translates between
3113 * obfuscated and clear Mines game descriptions. Pass in a game
3114 * description on the command line, and if it's clear it will be
3115 * obfuscated and vice versa. The output text should also be a
3116 * valid game ID describing the same game. Like this:
3118 * $ ./mineobfusc 9x9:4,4,mb071b49fbd1cb6a0d5868
3119 * 9x9:4,4,004000007c00010022080
3120 * $ ./mineobfusc 9x9:4,4,004000007c00010022080
3121 * 9x9:4,4,mb071b49fbd1cb6a0d5868
3124 int main(int argc, char **argv)
3128 char *id = NULL, *desc, *err;
3131 while (--argc > 0) {
3134 fprintf(stderr, "%s: unrecognised option `%s'\n", argv[0], p);
3142 fprintf(stderr, "usage: %s <game_id>\n", argv[0]);
3146 desc = strchr(id, ':');
3148 fprintf(stderr, "%s: game id expects a colon in it\n", argv[0]);
3153 p = default_params();
3154 decode_params(p, id);
3155 err = validate_desc(p, desc);
3157 fprintf(stderr, "%s: %s\n", argv[0], err);
3160 s = new_game(NULL, p, desc);
3163 while (*desc && *desc != ',') desc++;
3166 while (*desc && *desc != ',') desc++;
3169 printf("%s:%s\n", id, describe_layout(s->layout->mines,