gtp.c

   1 #define DEBUG
   2 #include <assert.h>
   3 #include <ctype.h>
   4 #include <stdarg.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8
   9 #include "board.h"
  10 #include "debug.h"
  11 #include "engine.h"
  12 #include "gtp.h"
  13 #include "mq.h"
  14 #include "uct/uct.h"
  15 #include "version.h"
  16 #include "timeinfo.h"
  17
  18 void
  19 gtp_prefix(char prefix, int id)
  20 {
  21         if (id >= 0)
  22                 printf("%c%d ", prefix, id);
  23         else
  24                 printf("%c ", prefix);
  25 }
  26
  27 void
  28 gtp_flush(void)
  29 {
  30         putchar('\n');
  31         fflush(stdout);
  32 }
  33
  34 void
  35 gtp_output(char prefix, int id, va_list params)
  36 {
  37         gtp_prefix(prefix, id);
  38         char *s;
  39         while ((s = va_arg(params, char *))) {
  40                 fputs(s, stdout);
  41         }
  42         putchar('\n');
  43         gtp_flush();
  44 }
  45
  46 void
  47 gtp_reply(int id, ...)
  48 {
  49         va_list params;
  50         va_start(params, id);
  51         gtp_output('=', id, params);
  52         va_end(params);
  53 }
  54
  55 void
  56 gtp_error(int id, ...)
  57 {
  58         va_list params;
  59         va_start(params, id);
  60         gtp_output('?', id, params);
  61         va_end(params);
  62 }
  63
  64
  65 /* XXX: THIS IS TOTALLY INSECURE!!!!
  66  * Even basic input checking is missing. */
  67
  68 void
  69 gtp_parse(struct board *board, struct engine *engine, struct time_info *ti, char *buf)
  70 {
  71 #define next_tok(to_) \
  72         to_ = next; \
  73         next = next + strcspn(next, " \t\r\n"); \
  74         if (*next) { \
  75                 *next = 0; next++; \
  76                 next += strspn(next, " \t\r\n"); \
  77         }
  78
  79         if (strchr(buf, '#'))
  80                 *strchr(buf, '#') = 0;
  81
  82         char *cmd, *next = buf;
  83         next_tok(cmd);
  84
  85         int id = -1;
  86         if (isdigit(*cmd)) {
  87                 id = atoi(cmd);
  88                 next_tok(cmd);
  89         }
  90
  91         if (!*cmd)
  92                 return;
  93
  94         if (!strcasecmp(cmd, "protocol_version")) {
  95                 gtp_reply(id, "2", NULL);
  96
  97         } else if (!strcasecmp(cmd, "name")) {
  98                 /* KGS hack */
  99                 gtp_reply(id, "Pachi ", engine->name, NULL);
 100
 101         } else if (!strcasecmp(cmd, "version")) {
 102                 gtp_reply(id, PACHI_VERSION, ": ", engine->comment, NULL);
 103
 104                 /* TODO: known_command */
 105
 106         } else if (!strcasecmp(cmd, "list_commands")) {
 107                 gtp_reply(id, "protocol_version\n"
 108                               "name\n"
 109                               "version\n"
 110                               "list_commands\n"
 111                               "quit\n"
 112                               "boardsize\n"
 113                               "clear_board\n"
 114                               "komi\n"
 115                               "play\n"
 116                               "genmove\n"
 117                               "kgs-genmove_cleanup\n"
 118                               "set_free_handicap\n"
 119                               "place_free_handicap\n"
 120                               "final_status_list\n"
 121                               "kgs-chat\n"
 122                               "time_left\n"
 123                               "time_settings\n"
 124                               "kgs-time_settings", NULL);
 125
 126         } else if (!strcasecmp(cmd, "quit")) {
 127                 gtp_reply(id, NULL);
 128                 exit(0);
 129
 130         } else if (!strcasecmp(cmd, "boardsize")) {
 131                 char *arg;
 132                 next_tok(arg);
 133                 board_resize(board, atoi(arg));
 134
 135                 gtp_reply(id, NULL);
 136
 137         } else if (!strcasecmp(cmd, "clear_board")) {
 138                 board_clear(board);
 139                 engine_reset = true;
 140                 if (DEBUGL(1))
 141                         board_print(board, stderr);
 142                 gtp_reply(id, NULL);
 143
 144         } else if (!strcasecmp(cmd, "komi")) {
 145                 char *arg;
 146                 next_tok(arg);
 147                 sscanf(arg, "%f", &board->komi);
 148
 149                 if (DEBUGL(1))
 150                         board_print(board, stderr);
 151                 gtp_reply(id, NULL);
 152
 153         } else if (!strcasecmp(cmd, "play")) {
 154                 struct move m;
 155
 156                 char *arg;
 157                 next_tok(arg);
 158                 m.color = str2stone(arg);
 159                 next_tok(arg);
 160                 coord_t *c = str2coord(arg, board_size(board));
 161                 m.coord = *c; coord_done(c);
 162                 char *reply = NULL;
 163
 164                 if (DEBUGL(1))
 165                         fprintf(stderr, "got move %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 166
 167                 // This is where kgs starts our timer, not at coming genmove!
 168                 time_start_timer(&ti[stone_other(m.color)]);
 169
 170                 if (engine->notify_play)
 171                         reply = engine->notify_play(engine, board, &m);
 172                 if (board_play(board, &m) < 0) {
 173                         if (DEBUGL(0)) {
 174                                 fprintf(stderr, "! ILLEGAL MOVE %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 175                                 board_print(board, stderr);
 176                         }
 177                         gtp_error(id, "illegal move", NULL);
 178                 } else {
 179                         if (DEBUGL(1))
 180                                 board_print(board, stderr);
 181                         gtp_reply(id, reply, NULL);
 182                 }
 183
 184         } else if (!strcasecmp(cmd, "genmove") || !strcasecmp(cmd, "kgs-genmove_cleanup")) {
 185                 char *arg;
 186                 next_tok(arg);
 187                 enum stone color = str2stone(arg);
 188                 time_prepare_move(&ti[color], board);
 189
 190                 coord_t *c = engine->genmove(engine, board, &ti[color], color, !strcasecmp(cmd, "kgs-genmove_cleanup"));
 191                 struct move m = { *c, color };
 192                 board_play(board, &m);
 193                 char *str = coord2str(*c, board);
 194                 if (DEBUGL(1))
 195                         fprintf(stderr, "playing move %s\n", str);
 196                 if (DEBUGL(1)) {
 197                         board_print_custom(board, stderr, engine->printhook);
 198                 }
 199                 gtp_reply(id, str, NULL);
 200                 free(str); coord_done(c);
 201
 202         } else if (!strcasecmp(cmd, "set_free_handicap")) {
 203                 struct move m;
 204                 m.color = S_BLACK;
 205
 206                 char *arg;
 207                 next_tok(arg);
 208                 do {
 209                         coord_t *c = str2coord(arg, board_size(board));
 210                         m.coord = *c; coord_done(c);
 211                         if (DEBUGL(1))
 212                                 fprintf(stderr, "setting handicap %d,%d\n", coord_x(m.coord, board), coord_y(m.coord, board));
 213
 214                         if (board_play(board, &m) < 0) {
 215                                 if (DEBUGL(0))
 216                                         fprintf(stderr, "! ILLEGAL MOVE %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 217                                 gtp_error(id, "illegal move", NULL);
 218                         }
 219                         board->handicap++;
 220                         next_tok(arg);
 221                 } while (*arg);
 222                 if (DEBUGL(1))
 223                         board_print(board, stderr);
 224                 gtp_reply(id, NULL);
 225
 226         /* TODO: Engine should choose free handicap; however, it tends to take
 227          * overly long to think it all out, and unless it's clever its
 228          * handicap stones won't be of much help. ;-) */
 229         } else if (!strcasecmp(cmd, "place_free_handicap")
 230                   || !strcasecmp(cmd, "fixed_handicap")) {
 231                 char *arg;
 232                 next_tok(arg);
 233                 int stones = atoi(arg);
 234
 235                 gtp_prefix('=', id);
 236                 board_handicap(board, stones, stdout);
 237                 if (DEBUGL(1))
 238                         board_print(board, stderr);
 239                 putchar('\n');
 240                 gtp_flush();
 241
 242         } else if (!strcasecmp(cmd, "final_score")) {
 243                 struct move_queue q = { .moves = 0 };
 244                 if (engine->dead_group_list)
 245                         engine->dead_group_list(engine, board, &q);
 246                 float score = board_official_score(board, &q);
 247                 char str[64];
 248                 if (DEBUGL(1))
 249                         fprintf(stderr, "counted score %.1f\n", score);
 250                 if (score == 0) {
 251                         gtp_reply(id, "0", NULL);
 252                 } else if (score > 0) {
 253                         snprintf(str, 64, "W+%.1f", score);
 254                         gtp_reply(id, str, NULL);
 255                 } else {
 256                         snprintf(str, 64, "B+%.1f", -score);
 257                         gtp_reply(id, str, NULL);
 258                 }
 259
 260         /* XXX: This is a huge hack. */
 261         } else if (!strcasecmp(cmd, "final_status_list")) {
 262                 char *arg;
 263                 next_tok(arg);
 264                 struct move_queue q = { .moves = 0 };
 265                 if (engine->dead_group_list)
 266                         engine->dead_group_list(engine, board, &q);
 267                 /* else we return empty list - i.e. engine not supporting
 268                  * this assumes all stones alive at the game end. */
 269                 if (!strcasecmp(arg, "dead")) {
 270                         gtp_prefix('=', id);
 271                         for (int i = 0; i < q.moves; i++) {
 272                                 foreach_in_group(board, q.move[i]) {
 273                                         printf("%s ", coord2sstr(c, board));
 274                                 } foreach_in_group_end;
 275                                 putchar('\n');
 276                         }
 277                         if (!q.moves)
 278                                 putchar('\n');
 279                         gtp_flush();
 280                 } else if (!strcasecmp(arg, "seki") || !strcasecmp(arg, "alive")) {
 281                         gtp_prefix('=', id);
 282                         bool printed_group = false;
 283                         foreach_point(board) { // foreach_group, effectively
 284                                 group_t g = group_at(board, c);
 285                                 if (!g || g != c) continue;
 286
 287                                 for (int i = 0; i < q.moves; i++) {
 288                                         if (q.move[i] == g)
 289                                                 goto next_group;
 290                                 }
 291                                 foreach_in_group(board, g) {
 292                                         printf("%s ", coord2sstr(c, board));
 293                                 } foreach_in_group_end;
 294                                 putchar('\n');
 295                                 printed_group = true;
 296 next_group:;
 297                         } foreach_point_end;
 298                         if (!printed_group)
 299                                 putchar('\n');
 300                         gtp_flush();
 301                 } else {
 302                         gtp_error(id, "illegal status specifier", NULL);
 303                 }
 304
 305         /* Custom commands for handling UCT opening book */
 306         } else if (!strcasecmp(cmd, "uct_genbook")) {
 307                 /* Board must be initialized properly, as if for genmove;
 308                  * makes sense only as 'uct_genbook b'. */
 309                 char *arg;
 310                 next_tok(arg);
 311                 enum stone color = str2stone(arg);
 312                 if (uct_genbook(engine, board, &ti[color], color))
 313                         gtp_reply(id, NULL);
 314                 else
 315                         gtp_error(id, "error generating book", NULL);
 316
 317         } else if (!strcasecmp(cmd, "uct_dumpbook")) {
 318                 char *arg;
 319                 next_tok(arg);
 320                 enum stone color = str2stone(arg);
 321                 uct_dumpbook(engine, board, color);
 322                 gtp_reply(id, NULL);
 323
 324         } else if (!strcasecmp(cmd, "kgs-chat")) {
 325                 char *loc;
 326                 next_tok(loc);
 327                 char *src;
 328                 next_tok(src);
 329                 char *msg;
 330                 next_tok(msg);
 331                 char *reply = NULL;
 332                 if (engine->chat)
 333                         reply = engine->chat(engine, board, msg);
 334                 if (reply)
 335                         gtp_reply(id, reply, NULL);
 336                 else
 337                         gtp_error(id, "unknown chat command", NULL);
 338
 339         } else if (!strcasecmp(cmd, "time_left")) {
 340                 char *arg;
 341                 next_tok(arg);
 342                 enum stone color = str2stone(arg);
 343                 next_tok(arg);
 344                 int time = atoi(arg);
 345                 next_tok(arg);
 346                 int stones = atoi(arg);
 347                 time_left(&ti[color], time, stones);
 348
 349                 gtp_reply(id, NULL);
 350
 351         } else if (!strcasecmp(cmd, "time_settings") || !strcasecmp(cmd, "kgs-time_settings")) {
 352                 char *time_system = "canadian";
 353                 char *arg;
 354                 int main_time = -1, byoyomi_time = 0, byoyomi_stones = 0, byoyomi_periods = 0;
 355                 if (!strcasecmp(cmd, "kgs-time_settings")) {
 356                         next_tok(time_system);
 357                         if (!strcasecmp(time_system, "none")) {
 358                                 // time > 0, stones 0: convention for unlimited
 359                                 byoyomi_time = 1;
 360                                 main_time = 0;
 361                         } else if (!strcasecmp(time_system, "absolute")) {
 362                                 next_tok(arg);
 363                                 main_time = atoi(arg);
 364                         } else if (!strcasecmp(time_system, "byoyomi")) {
 365                                 next_tok(arg);
 366                                 main_time = atoi(arg);
 367                                 next_tok(arg);
 368                                 byoyomi_time = atoi(arg);
 369                                 byoyomi_stones = 1;
 370                                 next_tok(arg);
 371                                 byoyomi_periods = atoi(arg);
 372                         }
 373                 }
 374                 if (main_time < 0) { // canadian time system
 375                         next_tok(arg);
 376                         main_time = atoi(arg);
 377                         next_tok(arg);
 378                         byoyomi_time = atoi(arg);
 379                         next_tok(arg);
 380                         byoyomi_stones = atoi(arg);
 381                 }
 382                 if (DEBUGL(1))
 383                         fprintf(stderr, "time_settings %d %d %d %d\n",
 384                                 main_time, byoyomi_time, byoyomi_stones, byoyomi_periods);
 385                 time_settings(&ti[S_BLACK], main_time, byoyomi_time, byoyomi_stones, byoyomi_periods);
 386                 ti[S_WHITE] = ti[S_BLACK];
 387
 388                 gtp_reply(id, NULL);
 389
 390         } else {
 391                 gtp_error(id, "unknown command", NULL);
 392         }
 393
 394 #undef next_tok
 395 }