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\nname\nversion\nlist_commands\nquit\nboardsize\nclear_board\nkomi\nplay\ngenmove\nkgs-genmove_cleanup\nset_free_handicap\nplace_free_handicap\nfinal_status_list\nkgs-chat", NULL);
 108
 109         } else if (!strcasecmp(cmd, "quit")) {
 110                 gtp_reply(id, NULL);
 111                 exit(0);
 112
 113         } else if (!strcasecmp(cmd, "boardsize")) {
 114                 char *arg;
 115                 next_tok(arg);
 116                 board_resize(board, atoi(arg));
 117
 118                 gtp_reply(id, NULL);
 119
 120         } else if (!strcasecmp(cmd, "clear_board")) {
 121                 board_clear(board);
 122                 engine_reset = true;
 123                 if (DEBUGL(1))
 124                         board_print(board, stderr);
 125                 gtp_reply(id, NULL);
 126
 127         } else if (!strcasecmp(cmd, "komi")) {
 128                 char *arg;
 129                 next_tok(arg);
 130                 sscanf(arg, "%f", &board->komi);
 131
 132                 if (DEBUGL(1))
 133                         board_print(board, stderr);
 134                 gtp_reply(id, NULL);
 135
 136         } else if (!strcasecmp(cmd, "play")) {
 137                 struct move m;
 138
 139                 char *arg;
 140                 next_tok(arg);
 141                 m.color = str2stone(arg);
 142                 next_tok(arg);
 143                 coord_t *c = str2coord(arg, board_size(board));
 144                 m.coord = *c; coord_done(c);
 145                 char *reply = NULL;
 146
 147                 if (DEBUGL(1))
 148                         fprintf(stderr, "got move %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 149
 150                 time_start_timer(&ti[stone_other(m.color)]); // This is where kgs starts our timer, not at coming genmove
 151                 if (engine->notify_play)
 152                         reply = engine->notify_play(engine, board, &m);
 153                 if (board_play(board, &m) < 0) {
 154                         if (DEBUGL(0)) {
 155                                 fprintf(stderr, "! ILLEGAL MOVE %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 156                                 board_print(board, stderr);
 157                         }
 158                         gtp_error(id, "illegal move", NULL);
 159                 } else {
 160                         if (DEBUGL(1))
 161                                 board_print(board, stderr);
 162                         gtp_reply(id, reply, NULL);
 163                 }
 164
 165         } else if (!strcasecmp(cmd, "genmove") || !strcasecmp(cmd, "kgs-genmove_cleanup")) {
 166                 char *arg;
 167                 next_tok(arg);
 168                 enum stone color = str2stone(arg);
 169                 time_prepare_move(ti, board);
 170
 171                 coord_t *c = engine->genmove(engine, board, ti, color, !strcasecmp(cmd, "kgs-genmove_cleanup"));
 172                 struct move m = { *c, color };
 173                 board_play(board, &m);
 174                 char *str = coord2str(*c, board);
 175                 if (DEBUGL(1))
 176                         fprintf(stderr, "playing move %s\n", str);
 177                 if (DEBUGL(1)) {
 178                         board_print_custom(board, stderr, engine->printhook);
 179                 }
 180                 gtp_reply(id, str, NULL);
 181                 free(str); coord_done(c);
 182
 183         } else if (!strcasecmp(cmd, "set_free_handicap")) {
 184                 struct move m;
 185                 m.color = S_BLACK;
 186
 187                 char *arg;
 188                 next_tok(arg);
 189                 do {
 190                         coord_t *c = str2coord(arg, board_size(board));
 191                         m.coord = *c; coord_done(c);
 192                         if (DEBUGL(1))
 193                                 fprintf(stderr, "setting handicap %d,%d\n", coord_x(m.coord, board), coord_y(m.coord, board));
 194
 195                         if (board_play(board, &m) < 0) {
 196                                 if (DEBUGL(0))
 197                                         fprintf(stderr, "! ILLEGAL MOVE %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 198                                 gtp_error(id, "illegal move", NULL);
 199                         }
 200                         board->handicap++;
 201                         next_tok(arg);
 202                 } while (*arg);
 203                 if (DEBUGL(1))
 204                         board_print(board, stderr);
 205                 gtp_reply(id, NULL);
 206
 207         /* TODO: Engine should choose free handicap; however, it tends to take
 208          * overly long to think it all out, and unless it's clever its
 209          * handicap stones won't be of much help. ;-) */
 210         } else if (!strcasecmp(cmd, "place_free_handicap")
 211                   || !strcasecmp(cmd, "fixed_handicap")) {
 212                 char *arg;
 213                 next_tok(arg);
 214                 int stones = atoi(arg);
 215
 216                 gtp_prefix('=', id);
 217                 board_handicap(board, stones, stdout);
 218                 if (DEBUGL(1))
 219                         board_print(board, stderr);
 220                 putchar('\n');
 221                 gtp_flush();
 222
 223         } else if (!strcasecmp(cmd, "final_score")) {
 224                 struct move_queue q = { .moves = 0 };
 225                 if (engine->dead_group_list)
 226                         engine->dead_group_list(engine, board, &q);
 227                 float score = board_official_score(board, &q);
 228                 char str[64];
 229                 if (DEBUGL(1))
 230                         fprintf(stderr, "counted score %.1f\n", score);
 231                 if (score == 0) {
 232                         gtp_reply(id, "0", NULL);
 233                 } else if (score > 0) {
 234                         snprintf(str, 64, "W+%.1f", score);
 235                         gtp_reply(id, str, NULL);
 236                 } else {
 237                         snprintf(str, 64, "B+%.1f", -score);
 238                         gtp_reply(id, str, NULL);
 239                 }
 240
 241         /* XXX: This is a huge hack. */
 242         } else if (!strcasecmp(cmd, "final_status_list")) {
 243                 char *arg;
 244                 next_tok(arg);
 245                 struct move_queue q = { .moves = 0 };
 246                 if (engine->dead_group_list)
 247                         engine->dead_group_list(engine, board, &q);
 248                 /* else we return empty list - i.e. engine not supporting
 249                  * this assumes all stones alive at the game end. */
 250                 if (!strcasecmp(arg, "dead")) {
 251                         gtp_prefix('=', id);
 252                         for (int i = 0; i < q.moves; i++) {
 253                                 foreach_in_group(board, q.move[i]) {
 254                                         printf("%s ", coord2sstr(c, board));
 255                                 } foreach_in_group_end;
 256                                 putchar('\n');
 257                         }
 258                         if (!q.moves)
 259                                 putchar('\n');
 260                         gtp_flush();
 261                 } else if (!strcasecmp(arg, "seki") || !strcasecmp(arg, "alive")) {
 262                         gtp_prefix('=', id);
 263                         bool printed_group = false;
 264                         foreach_point(board) { // foreach_group, effectively
 265                                 group_t g = group_at(board, c);
 266                                 if (!g || g != c) continue;
 267
 268                                 for (int i = 0; i < q.moves; i++) {
 269                                         if (q.move[i] == g)
 270                                                 goto next_group;
 271                                 }
 272                                 foreach_in_group(board, g) {
 273                                         printf("%s ", coord2sstr(c, board));
 274                                 } foreach_in_group_end;
 275                                 putchar('\n');
 276                                 printed_group = true;
 277 next_group:;
 278                         } foreach_point_end;
 279                         if (!printed_group)
 280                                 putchar('\n');
 281                         gtp_flush();
 282                 } else {
 283                         gtp_error(id, "illegal status specifier", NULL);
 284                 }
 285
 286         /* Custom commands for handling UCT opening book */
 287         } else if (!strcasecmp(cmd, "uct_genbook")) {
 288                 /* Board must be initialized properly, as if for genmove;
 289                  * makes sense only as 'uct_genbook b'. */
 290                 char *arg;
 291                 next_tok(arg);
 292                 enum stone color = str2stone(arg);
 293                 if (uct_genbook(engine, board, ti, color))
 294                         gtp_reply(id, NULL);
 295                 else
 296                         gtp_error(id, "error generating book", NULL);
 297
 298         } else if (!strcasecmp(cmd, "uct_dumpbook")) {
 299                 char *arg;
 300                 next_tok(arg);
 301                 enum stone color = str2stone(arg);
 302                 uct_dumpbook(engine, board, color);
 303                 gtp_reply(id, NULL);
 304
 305         } else if (!strcasecmp(cmd, "kgs-chat")) {
 306                 char *loc;
 307                 next_tok(loc);
 308                 char *src;
 309                 next_tok(src);
 310                 char *msg;
 311                 next_tok(msg);
 312                 char *reply = NULL;
 313                 if (engine->chat)
 314                         reply = engine->chat(engine, board, msg);
 315                 if (reply)
 316                         gtp_reply(id, reply, NULL);
 317                 else
 318                         gtp_error(id, "unknown chat command", NULL);
 319
 320         } else {
 321                 gtp_error(id, "unknown command", NULL);
 322         }
 323
 324 #undef next_tok
 325 }