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
 189                 coord_t *c = engine->genmove(engine, board, &ti[color], color, !strcasecmp(cmd, "kgs-genmove_cleanup"));
 190                 struct move m = { *c, color };
 191                 board_play(board, &m);
 192                 char *str = coord2str(*c, board);
 193                 if (DEBUGL(1))
 194                         fprintf(stderr, "playing move %s\n", str);
 195                 if (DEBUGL(1)) {
 196                         board_print_custom(board, stderr, engine->printhook);
 197                 }
 198                 gtp_reply(id, str, NULL);
 199                 free(str); coord_done(c);
 200
 201         } else if (!strcasecmp(cmd, "set_free_handicap")) {
 202                 struct move m;
 203                 m.color = S_BLACK;
 204
 205                 char *arg;
 206                 next_tok(arg);
 207                 do {
 208                         coord_t *c = str2coord(arg, board_size(board));
 209                         m.coord = *c; coord_done(c);
 210                         if (DEBUGL(1))
 211                                 fprintf(stderr, "setting handicap %d,%d\n", coord_x(m.coord, board), coord_y(m.coord, board));
 212
 213                         if (board_play(board, &m) < 0) {
 214                                 if (DEBUGL(0))
 215                                         fprintf(stderr, "! ILLEGAL MOVE %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 216                                 gtp_error(id, "illegal move", NULL);
 217                         }
 218                         board->handicap++;
 219                         next_tok(arg);
 220                 } while (*arg);
 221                 if (DEBUGL(1))
 222                         board_print(board, stderr);
 223                 gtp_reply(id, NULL);
 224
 225         /* TODO: Engine should choose free handicap; however, it tends to take
 226          * overly long to think it all out, and unless it's clever its
 227          * handicap stones won't be of much help. ;-) */
 228         } else if (!strcasecmp(cmd, "place_free_handicap")
 229                   || !strcasecmp(cmd, "fixed_handicap")) {
 230                 char *arg;
 231                 next_tok(arg);
 232                 int stones = atoi(arg);
 233
 234                 gtp_prefix('=', id);
 235                 board_handicap(board, stones, stdout);
 236                 if (DEBUGL(1))
 237                         board_print(board, stderr);
 238                 putchar('\n');
 239                 gtp_flush();
 240
 241         } else if (!strcasecmp(cmd, "final_score")) {
 242                 struct move_queue q = { .moves = 0 };
 243                 if (engine->dead_group_list)
 244                         engine->dead_group_list(engine, board, &q);
 245                 float score = board_official_score(board, &q);
 246                 char str[64];
 247                 if (DEBUGL(1))
 248                         fprintf(stderr, "counted score %.1f\n", score);
 249                 if (score == 0) {
 250                         gtp_reply(id, "0", NULL);
 251                 } else if (score > 0) {
 252                         snprintf(str, 64, "W+%.1f", score);
 253                         gtp_reply(id, str, NULL);
 254                 } else {
 255                         snprintf(str, 64, "B+%.1f", -score);
 256                         gtp_reply(id, str, NULL);
 257                 }
 258
 259         /* XXX: This is a huge hack. */
 260         } else if (!strcasecmp(cmd, "final_status_list")) {
 261                 char *arg;
 262                 next_tok(arg);
 263                 struct move_queue q = { .moves = 0 };
 264                 if (engine->dead_group_list)
 265                         engine->dead_group_list(engine, board, &q);
 266                 /* else we return empty list - i.e. engine not supporting
 267                  * this assumes all stones alive at the game end. */
 268                 if (!strcasecmp(arg, "dead")) {
 269                         gtp_prefix('=', id);
 270                         for (int i = 0; i < q.moves; i++) {
 271                                 foreach_in_group(board, q.move[i]) {
 272                                         printf("%s ", coord2sstr(c, board));
 273                                 } foreach_in_group_end;
 274                                 putchar('\n');
 275                         }
 276                         if (!q.moves)
 277                                 putchar('\n');
 278                         gtp_flush();
 279                 } else if (!strcasecmp(arg, "seki") || !strcasecmp(arg, "alive")) {
 280                         gtp_prefix('=', id);
 281                         bool printed_group = false;
 282                         foreach_point(board) { // foreach_group, effectively
 283                                 group_t g = group_at(board, c);
 284                                 if (!g || g != c) continue;
 285
 286                                 for (int i = 0; i < q.moves; i++) {
 287                                         if (q.move[i] == g)
 288                                                 goto next_group;
 289                                 }
 290                                 foreach_in_group(board, g) {
 291                                         printf("%s ", coord2sstr(c, board));
 292                                 } foreach_in_group_end;
 293                                 putchar('\n');
 294                                 printed_group = true;
 295 next_group:;
 296                         } foreach_point_end;
 297                         if (!printed_group)
 298                                 putchar('\n');
 299                         gtp_flush();
 300                 } else {
 301                         gtp_error(id, "illegal status specifier", NULL);
 302                 }
 303
 304         /* Custom commands for handling UCT opening book */
 305         } else if (!strcasecmp(cmd, "uct_genbook")) {
 306                 /* Board must be initialized properly, as if for genmove;
 307                  * makes sense only as 'uct_genbook b'. */
 308                 char *arg;
 309                 next_tok(arg);
 310                 enum stone color = str2stone(arg);
 311                 if (uct_genbook(engine, board, &ti[color], color))
 312                         gtp_reply(id, NULL);
 313                 else
 314                         gtp_error(id, "error generating book", NULL);
 315
 316         } else if (!strcasecmp(cmd, "uct_dumpbook")) {
 317                 char *arg;
 318                 next_tok(arg);
 319                 enum stone color = str2stone(arg);
 320                 uct_dumpbook(engine, board, color);
 321                 gtp_reply(id, NULL);
 322
 323         } else if (!strcasecmp(cmd, "kgs-chat")) {
 324                 char *loc;
 325                 next_tok(loc);
 326                 char *src;
 327                 next_tok(src);
 328                 char *msg;
 329                 next_tok(msg);
 330                 char *reply = NULL;
 331                 if (engine->chat)
 332                         reply = engine->chat(engine, board, msg);
 333                 if (reply)
 334                         gtp_reply(id, reply, NULL);
 335                 else
 336                         gtp_error(id, "unknown chat command", NULL);
 337
 338         } else if (!strcasecmp(cmd, "time_left")) {
 339                 char *arg;
 340                 next_tok(arg);
 341                 enum stone color = str2stone(arg);
 342                 next_tok(arg);
 343                 int time = atoi(arg);
 344                 next_tok(arg);
 345                 int stones = atoi(arg);
 346                 if (!ti[color].ignore_gtp) {
 347                         time_left(&ti[color], time, stones);
 348                 } else {
 349                         if (DEBUGL(2)) fprintf(stderr, "ignored time info\n");
 350                 }
 351
 352                 gtp_reply(id, NULL);
 353
 354         } else if (!strcasecmp(cmd, "time_settings") || !strcasecmp(cmd, "kgs-time_settings")) {
 355                 char *time_system = "canadian";
 356                 char *arg;
 357                 int main_time = -1, byoyomi_time = 0, byoyomi_stones = 0, byoyomi_periods = 0;
 358                 if (!strcasecmp(cmd, "kgs-time_settings")) {
 359                         next_tok(time_system);
 360                         if (!strcasecmp(time_system, "none")) {
 361                                 // time > 0, stones 0: convention for unlimited
 362                                 byoyomi_time = 1;
 363                                 main_time = 0;
 364                         } else if (!strcasecmp(time_system, "absolute")) {
 365                                 next_tok(arg);
 366                                 main_time = atoi(arg);
 367                         } else if (!strcasecmp(time_system, "byoyomi")) {
 368                                 next_tok(arg);
 369                                 main_time = atoi(arg);
 370                                 next_tok(arg);
 371                                 byoyomi_time = atoi(arg);
 372                                 byoyomi_stones = 1;
 373                                 next_tok(arg);
 374                                 byoyomi_periods = atoi(arg);
 375                         }
 376                 }
 377                 if (main_time < 0) { // canadian time system
 378                         next_tok(arg);
 379                         main_time = atoi(arg);
 380                         next_tok(arg);
 381                         byoyomi_time = atoi(arg);
 382                         next_tok(arg);
 383                         byoyomi_stones = atoi(arg);
 384                 }
 385                 if (DEBUGL(1))
 386                         fprintf(stderr, "time_settings %d %d %d %d\n",
 387                                 main_time, byoyomi_time, byoyomi_stones, byoyomi_periods);
 388                 if (!ti[S_BLACK].ignore_gtp) {
 389                         time_settings(&ti[S_BLACK], main_time, byoyomi_time, byoyomi_stones, byoyomi_periods);
 390                         ti[S_WHITE] = ti[S_BLACK];
 391                 } else {
 392                         if (DEBUGL(1)) fprintf(stderr, "ignored time info\n");
 393                 }
 394
 395                 gtp_reply(id, NULL);
 396
 397         } else {
 398                 gtp_error(id, "unknown command", NULL);
 399         }
 400
 401 #undef next_tok
 402 }