sol.c

   1 #define _DEFAULT_SOURCE
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <time.h>
   5 #include <termios.h>
   6 #include <unistd.h>
   7
   8 #include "sol.h"
   9 #include "schemes.h"
  10
  11 #ifdef KLONDIKE
  12 #define NUM_PILES 7
  13 #define MAX_HIDDEN 6 /*how many cards are turned over at most in a tableu pile*/
  14 #define MAX_STOCK 24 /*how many cards can be in the stock at most (=@start)*/
  15 #define NUM_DECKS 1
  16 #elif defined SPIDER
  17 #define MAX_HIDDEN 5
  18 #define NUM_PILES 10
  19 #define MAX_STOCK 50 /*how many cards can be dealt onto the piles*/
  20 #define NUM_DECKS 2
  21 #endif
  22
  23 #define get_suit(card) \
  24         ((card-1) % NUM_SUITS)
  25 #define get_rank(card) \
  26         ((card-1) / NUM_SUITS)
  27 #define get_color(card) \
  28         ((get_suit(card) ^ get_suit(card)>>1) & 1)
  29
  30 struct playfield {
  31         //TODO: stock and waste are incompatible with undo{}
  32         card_t s[MAX_STOCK]; /* stock */
  33         int z; /* stock size */
  34         int w; /* waste; index into stock (const -1 in spider) */
  35 #ifdef KLONDIKE
  36         card_t f[NUM_SUITS][MAX_HIDDEN+NUM_RANKS]; /* foundation (oversized to ease find_top()) */
  37         card_t t[NUM_PILES][MAX_HIDDEN+NUM_RANKS]; /* tableu piles */
  38 #elif defined SPIDER
  39         card_t f[NUM_DECKS*NUM_COLORS][MAX_HIDDEN+NUM_RANKS]; //each completed set gets put on its own pile, so undo is possible
  40         card_t t[NUM_PILES][MAX_HIDDEN+NUM_RANKS];
  41 #endif
  42         struct undo {
  43                 int from; /* pile cards were taken from */
  44                 int to; /* pile cards were moved to */
  45                 int n; /* number of cards moved */
  46                 struct undo* prev;
  47                 struct undo* next;
  48         } u;
  49 } f;
  50 struct opts {
  51         const struct scheme* s;
  52 } op;
  53
  54 #ifdef KLONDIKE
  55 //declare action as array 10 of array 10 of pointer to function (int,int) returning int
  56 // this stores a function pointer for every takeable action that is then called by execute()
  57 //lines = from, cols = to
  58 int (*action[10][10])(int,int) = {
  59         /* 0    1    2    3    4    5    6    7    8    9 */
  60 /* 0 */ { nop, f2t, f2t, f2t, f2t, f2t, f2t, f2t, nop, nop },
  61 /* 1 */ { t2f, nop, t2t, t2t, t2t, t2t, t2t, t2t, nop, nop },
  62 /* 2 */ { t2f, t2t, nop, t2t, t2t, t2t, t2t, t2t, nop, nop },
  63 /* 3 */ { t2f, t2t, t2t, nop, t2t, t2t, t2t, t2t, nop, nop },
  64 /* 4 */ { t2f, t2t, t2t, t2t, nop, t2t, t2t, t2t, nop, nop },
  65 /* 5 */ { t2f, t2t, t2t, t2t, t2t, nop, t2t, t2t, nop, nop },
  66 /* 6 */ { t2f, t2t, t2t, t2t, t2t, t2t, nop, t2t, nop, nop },
  67 /* 7 */ { t2f, t2t, t2t, t2t, t2t, t2t, t2t, nop, nop, nop },
  68 /* 8 */ { nop, nop, nop, nop, nop, nop, nop, nop, nop, s2w },
  69 /* 9 */ { w2f, w2t, w2t, w2t, w2t, w2t, w2t, w2t, w2s, nop },
  70 };
  71 #elif defined SPIDER
  72 int (*action[11][10])(int,int) = {
  73         //piles are zero-indexed in spider; stk=stock
  74         /* 0    1    2    3    4    5    6    7    8    9 */
  75 /* 0 */ { nop, t2t, t2t, t2t, t2t, t2t, t2t, t2t, t2t, t2t },
  76 /* 1 */ { t2t, nop, t2t, t2t, t2t, t2t, t2t, t2t, t2t, t2t },
  77 /* 2 */ { t2t, t2t, nop, t2t, t2t, t2t, t2t, t2t, t2t, t2t },
  78 /* 3 */ { t2t, t2t, t2t, nop, t2t, t2t, t2t, t2t, t2t, t2t },
  79 /* 4 */ { t2t, t2t, t2t, t2t, nop, t2t, t2t, t2t, t2t, t2t },
  80 /* 5 */ { t2t, t2t, t2t, t2t, t2t, nop, t2t, t2t, t2t, t2t },
  81 /* 6 */ { t2t, t2t, t2t, t2t, t2t, t2t, nop, t2t, t2t, t2t },
  82 /* 7 */ { t2t, t2t, t2t, t2t, t2t, t2t, t2t, nop, t2t, t2t },
  83 /* 8 */ { t2t, t2t, t2t, t2t, t2t, t2t, t2t, t2t, nop, t2t },
  84 /* 9 */ { t2t, t2t, t2t, t2t, t2t, t2t, t2t, t2t, t2t, nop },
  85 /*stk*/ { s2t, s2t, s2t, s2t, s2t, s2t, s2t, s2t, s2t, s2t },
  86 };
  87 #endif
  88
  89 int main(int argc, char** argv) {
  90         //op.s = &unicode_small_mono;
  91         //op.s = &unicode_large_mono;
  92         op.s = &unicode_large_color;
  93         raw_mode(1); //TODO: alt.screen, etc.
  94         sol();
  95         raw_mode(0);
  96 }
  97
  98 void sol(void) {
  99         f = (const struct playfield){0};
 100         deal();
 101
 102         int from, to;
 103         print_table();
 104         while (!get_cmd(&from, &to)) {
 105                 if (action[from][to](from,to)) {
 106                         printf ("\033[?5h");
 107                         fflush (stdout);
 108                         usleep (100000);
 109                         printf ("\033[?5l");
 110                 }
 111                 print_table();
 112         }
 113 }
 114
 115 int find_top(card_t* pile) {
 116         int i;
 117         for(i=MAX_HIDDEN+NUM_RANKS-1; i>=0 && !pile[i]; i--);
 118         return i;
 119 }
 120 void turn_over(card_t* pile) {
 121         int top = find_top(pile);
 122         if (pile[top] < 0) pile[top] *= -1;
 123 }
 124 #ifdef KLONDIKE
 125 card_t stack_take(void) { /*NOTE: assert(f.w >= 0) */
 126         card_t card = f.s[f.w];
 127         /* move stack one over, so there are no gaps in it: */
 128         for (int i = f.w; i < f.z-1; i++)
 129                 f.s[i] = f.s[i+1];
 130         f.z--;
 131         f.w--; /* make previous card visible again */
 132         return card;
 133 }
 134 int t2f(int from, int to) { /* tableu to foundation */
 135         from--; //remove off-by-one
 136         int top_from = find_top(f.t[from]);
 137         to = get_suit(f.t[from][top_from]);
 138         int top_to   = find_top(f.f[to]);
 139         if ((top_to < 0 && get_rank(f.t[from][top_from]) == RANK_A)
 140         || (get_rank(f.f[to][top_to]) == get_rank(f.t[from][top_from])-1)) {
 141                 f.f[to][top_to+1] = f.t[from][top_from];
 142                 f.t[from][top_from] = NO_CARD;
 143                 turn_over(f.t[from]);
 144                 return 0;
 145         } else return 1;
 146 }
 147 int w2f(int from, int to) { /* waste to foundation */
 148         if (f.w < 0) return 1;
 149         to = get_suit(f.s[f.w]);
 150         int top_to = find_top(f.f[to]);
 151         if ((top_to < 0 && get_rank(f.s[f.w]) == RANK_A)
 152         || (get_rank(f.f[to][top_to]) == get_rank(f.s[f.w])-1)) {
 153                 f.f[to][top_to+1] = stack_take();
 154                 return 0;
 155         } else return 1;
 156
 157 }
 158 int s2w(int from, int to) { /* stock to waste */
 159         if (f.z == 0) return 1;
 160         f.w++;
 161         if (f.w == f.z) f.w = -1;
 162         return 0;
 163 }
 164 int w2s(int from, int to) { /* waste to stock (undoes stock to waste) */
 165         if (f.z == 0) return 1;
 166         f.w--;
 167         if (f.w < -1) f.w = f.z-1;
 168         return 0;
 169 }
 170 int f2t(int from, int to) { /* foundation to tableu */
 171         //TODO: there are two possible cards one can take. choosing one isn't implemented yet!
 172         to--; //remove off-by-one
 173         int top_to = find_top(f.t[to]);
 174         from = get_color(f.t[to][top_to]);
 175         int top_from = find_top(f.f[from]);
 176         if ((get_color(f.t[to][top_to]) != get_color(f.f[from][top_from]))
 177         && (get_rank(f.t[to][top_to]) == get_rank(f.f[from][top_from])+1)) {
 178                 f.t[to][top_to+1] = stack_take();
 179                 return 0;
 180         } else return 1;
 181 }
 182 int w2t(int from, int to) { //waste to tableu
 183         to--; //remove off-by-one
 184         int top_to = find_top(f.t[to]);
 185         if (((get_color(f.t[to][top_to]) != get_color(f.s[f.w]))
 186            && (get_rank(f.t[to][top_to]) == get_rank(f.s[f.w])+1))
 187         || (top_to < 0 && get_rank(f.s[f.w]) == RANK_K)) {
 188                 f.t[to][top_to+1] = stack_take();
 189                 return 0;
 190         } else return 1;
 191 }
 192 int t2t(int from, int to) {
 193         from--; to--; //remove off-by-one
 194         int top_to = find_top(f.t[to]);
 195         int top_from = find_top(f.t[from]);
 196         for (int i = top_from; i >=0; i--) {
 197                 //TODO: check that we aren't moving facedown cards!
 198                 if (((get_color(f.t[to][top_to]) != get_color(f.t[from][i]))
 199                    && (get_rank(f.t[to][top_to]) == get_rank(f.t[from][i])+1))
 200                 || (top_to < 0 && get_rank(f.t[from][i]) == RANK_K)) {
 201                         /* move cards [i..top_from] to their destination */
 202                         for (;i <= top_from; i++) {
 203                                 top_to++;
 204                                 f.t[to][top_to] = f.t[from][i];
 205                                 f.t[from][i] = NO_CARD;
 206                         }
 207                         turn_over(f.t[from]);
 208                         return 0;
 209                 }
 210         }
 211         return 1; /* no such move possible */
 212 }
 213 #elif defined SPIDER
 214 int t2t(int from, int to) { //TODO: implementation XXX
 215         from--; to--; //remove off-by-one
 216         f.t[from][find_top(f.t[from])] = NO_CARD;
 217         return 1;
 218 }
 219 int s2t(int from, int to) {
 220         if (f.z <= 0) return 1; /* stack still has cards? */
 221         for (int pile = 0; pile < NUM_PILES; pile++)
 222                 if (f.t[pile][0] == NO_CARD) return 1; /*no piles may be empty*/
 223         for (int pile = 0; pile < NUM_PILES; pile++) {
 224                 f.t[pile][find_top(f.t[pile])+1] = f.s[--f.z];
 225         }
 226         return 0;
 227 }
 228 #endif
 229 int nop(int from, int to) { return 1; }
 230
 231 int get_cmd (int* from, int* to) {
 232         //returns 0 on success or an error code indicating game quit, new game,...
 233         //TODO: only works for KLONDIKE
 234         //TODO: check validity
 235         //TODO: segfault on invalid input!
 236         char f, t;
 237         f = getchar();
 238 #ifdef SPIDER
 239         if (f=='\n') {
 240                 *from = 10;
 241                 *to = 0;
 242                 return CMD_MOVE;
 243         }
 244 #endif
 245         switch (f) {
 246         case 'q': return CMD_QUIT;
 247         case 'r': return CMD_NEW;
 248         default: if (f < '0' || f > '9') return CMD_INVAL;
 249         }
 250         t =
 251 #ifdef KLONDIKE
 252             (f=='8')?'9':
 253 #endif
 254                           getchar();
 255         *from = f-'0';
 256         *to = t-'0';
 257         return CMD_MOVE;
 258 }
 259
 260 void deal(void) {
 261         card_t deck[DECK_SIZE*NUM_DECKS];
 262         int avail = DECK_SIZE*NUM_DECKS;
 263         for (int i = 0; i < DECK_SIZE*NUM_DECKS; i++) deck[i] = (i%DECK_SIZE)+1;
 264         srandom (time(NULL));
 265         for (int i = DECK_SIZE*NUM_DECKS-1; i > 0; i--) { //fisher-yates
 266                 int j = random() % (i+1);
 267                 if (j-i) deck[i]^=deck[j],deck[j]^=deck[i],deck[i]^=deck[j];
 268         }
 269         // deal cards
 270         //foundation starts empty:
 271         for (int i = 0; i < NUM_SUITS; i++)
 272                 for (int j = NUM_RANKS; j; j--) f.f[i][j] = NO_CARD;
 273
 274         for (int i = 0; i < NUM_PILES; i++) {
 275 #ifdef KLONDIKE
 276                 //tableu: [0] = 0,1; [1] = 1,1; [2] = 2,1; ... [6] = 6,1
 277                 int closed = i;
 278 #elif defined SPIDER
 279                 //left 4 piles have 5 hidden + 1 shown
 280                 //right6 piles have 4 hidden + 1 shown
 281                 int closed = i<4?5:4;
 282 #endif
 283
 284                 for (int j = 0; j < closed; j++) f.t[i][j] = -deck[--avail]; //face-down cards are negative
 285                 f.t[i][closed] = deck[--avail]; //the face-up card
 286                 for (int j = closed+1; j < MAX_HIDDEN+NUM_RANKS; j++) f.t[i][j] = NO_CARD;
 287         }
 288         //rest of the cards to the stock (should be 50 for spider):
 289         for (f.z = 0; avail; f.z++) f.s[f.z] = deck[--avail];
 290         f.w = -1; /* @start: nothing on waste (no waste in spider -> const) */
 291 }
 292
 293 void print_table(void) { //{{{
 294 printf("\033[2J\033[H");//TEMP XXX -- use raw term mode
 295 #ifdef KLONDIKE
 296         //print stock, waste and foundation:
 297         for (int line = 0; line < op.s->height; line++) {
 298                 printf ("%s", ( /* stock */
 299                         (f.w < f.z-1)?op.s->facedown
 300                         :op.s->placeholder)[line]);
 301                 printf ("%s", ( /* waste */
 302                         ((short)f.w >= 0)?op.s->card[f.s[f.w]] //TODO: sometimes segfaults because f.w == (int)((short)-1)
 303                         :op.s->placeholder)[line]);
 304                 printf ("%s", op.s->card[NO_CARD][line]); /* spacer */
 305                 /* foundation: */
 306                 for (int pile = 0; pile < NUM_SUITS; pile++) {
 307                         for (int i = NUM_RANKS-1; i >=0; i--) {
 308                                 if (f.f[pile][i]) {
 309                                         printf ("%s", op.s->card[f.f[pile][i]][line]);
 310                                         goto next;
 311                                 }
 312                         }
 313                         printf ("%s", op.s->placeholder[line]);
 314 next:;
 315                 }
 316                 printf("\n");
 317         }
 318         printf("\n");
 319 #endif
 320         //print tableu piles:
 321         int row[NUM_PILES] = {0};
 322         int line[NUM_PILES]= {0};
 323         int line_had_card; // :|
 324 int label[NUM_PILES] = {0};//XXX
 325         do {
 326                 line_had_card = 0;
 327                 for (int pile = 0; pile < NUM_PILES; pile++) {
 328                         card_t card = f.t[pile][row[pile]];
 329                         card_t next = f.t[pile][row[pile]+1];
 330                         printf ("%s", (
 331                                 (card<0)?op.s->facedown
 332                                 :op.s->card[card]
 333                                 )[line[pile]]);
 334
 335                         if (++line[pile] >= (next?op.s->overlap:op.s->height)) {
 336                                 //TODO: allow extreme overlap on sequences
 337                                 line[pile]=0;
 338                                 row[pile]++;
 339                         }
 340                         if(!card && !label[pile]) label[pile] = 1, printf ("\b\b%d ", (pile+1) % 10);//XXX: print tableu labels
 341                         line_had_card |= !!card;
 342                 }
 343                 printf ("\n");
 344         } while (line_had_card);
 345 }//}}}
 346
 347 void append_undo (int n, int f, int t) {
 348         //check if we have to free redo buffer (.next)
 349         //malloc
 350         //update pointers
 351         *NULL;
 352 }
 353
 354 void raw_mode(int enable) { //{{{
 355         static struct termios saved_term_mode;
 356         struct termios raw_term_mode;
 357
 358         if (enable) {
 359                 tcgetattr(STDIN_FILENO, &saved_term_mode);
 360                 raw_term_mode = saved_term_mode;
 361                 raw_term_mode.c_lflag &= ~(ICANON | ECHO);
 362                 raw_term_mode.c_cc[VMIN] = 1 ;
 363                 raw_term_mode.c_cc[VTIME] = 0;
 364                 tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_term_mode);
 365         } else {
 366                 tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_term_mode);
 367         }
 368 } //}}}
 369
 370 //vim: foldmethod=marker