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
  17 void
  18 gtp_prefix(char prefix, int id)
  19 {
  20         if (id >= 0)
  21                 printf("%c%d ", prefix, id);
  22         else
  23                 printf("%c ", prefix);
  24 }
  25
  26 void
  27 gtp_flush(void)
  28 {
  29         putchar('\n');
  30         fflush(stdout);
  31 }
  32
  33 void
  34 gtp_output(char prefix, int id, va_list params)
  35 {
  36         gtp_prefix(prefix, id);
  37         char *s;
  38         while ((s = va_arg(params, char *))) {
  39                 fputs(s, stdout);
  40         }
  41         putchar('\n');
  42         gtp_flush();
  43 }
  44
  45 void
  46 gtp_reply(int id, ...)
  47 {
  48         va_list params;
  49         va_start(params, id);
  50         gtp_output('=', id, params);
  51         va_end(params);
  52 }
  53
  54 void
  55 gtp_error(int id, ...)
  56 {
  57         va_list params;
  58         va_start(params, id);
  59         gtp_output('?', id, params);
  60         va_end(params);
  61 }
  62
  63
  64 /* XXX: THIS IS TOTALLY INSECURE!!!!
  65  * Even basic input checking is missing. */
  66
  67 void
  68 gtp_parse(struct board *board, struct engine *engine, char *buf)
  69 {
  70 #define next_tok(to_) \
  71         to_ = next; \
  72         next = next + strcspn(next, " \t\r\n"); \
  73         if (*next) { \
  74                 *next = 0; next++; \
  75                 next += strspn(next, " \t\r\n"); \
  76         }
  77
  78         if (strchr(buf, '#'))
  79                 *strchr(buf, '#') = 0;
  80
  81         char *cmd, *next = buf;
  82         next_tok(cmd);
  83
  84         int id = -1;
  85         if (isdigit(*cmd)) {
  86                 id = atoi(cmd);
  87                 next_tok(cmd);
  88         }
  89
  90         if (!*cmd)
  91                 return;
  92
  93         if (!strcasecmp(cmd, "protocol_version")) {
  94                 gtp_reply(id, "2", NULL);
  95
  96         } else if (!strcasecmp(cmd, "name")) {
  97                 /* KGS hack */
  98                 gtp_reply(id, "Pachi ", engine->name, NULL);
  99
 100         } else if (!strcasecmp(cmd, "version")) {
 101                 gtp_reply(id, PACHI_VERSION, ": ", engine->comment, NULL);
 102
 103                 /* TODO: known_command */
 104
 105         } else if (!strcasecmp(cmd, "list_commands")) {
 106                 gtp_reply(id, "protocol_version\nname\nversion\nlist_commands\nquit\nboardsize\nclear_board\nkomi\nplay\ngenmove\nset_free_handicap\nplace_free_handicap\nfinal_status_list\nkgs-chat", NULL);
 107
 108         } else if (!strcasecmp(cmd, "quit")) {
 109                 gtp_reply(id, NULL);
 110                 exit(0);
 111
 112         } else if (!strcasecmp(cmd, "boardsize")) {
 113                 char *arg;
 114                 next_tok(arg);
 115                 board_resize(board, atoi(arg));
 116
 117                 gtp_reply(id, NULL);
 118
 119         } else if (!strcasecmp(cmd, "clear_board")) {
 120                 if (board->es) {
 121                         assert(engine->done_board_state);
 122                         engine->done_board_state(engine, board);
 123                 }
 124                 board_clear(board);
 125                 if (DEBUGL(1))
 126                         board_print(board, stderr);
 127                 gtp_reply(id, NULL);
 128
 129         } else if (!strcasecmp(cmd, "komi")) {
 130                 char *arg;
 131                 next_tok(arg);
 132                 sscanf(arg, "%f", &board->komi);
 133
 134                 if (DEBUGL(1))
 135                         board_print(board, stderr);
 136                 gtp_reply(id, NULL);
 137
 138         } else if (!strcasecmp(cmd, "play")) {
 139                 struct move m;
 140
 141                 char *arg;
 142                 next_tok(arg);
 143                 m.color = str2stone(arg);
 144                 next_tok(arg);
 145                 coord_t *c = str2coord(arg, board_size(board));
 146                 m.coord = *c; coord_done(c);
 147                 char *reply = NULL;
 148
 149                 if (DEBUGL(1))
 150                         fprintf(stderr, "got move %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 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")) {
 166                 char *arg;
 167                 next_tok(arg);
 168                 enum stone color = str2stone(arg);
 169                 coord_t *c = engine->genmove(engine, board, color);
 170                 struct move m = { *c, color };
 171                 board_play(board, &m);
 172                 char *str = coord2str(*c, board);
 173                 if (DEBUGL(1))
 174                         fprintf(stderr, "playing move %s\n", str);
 175                 if (DEBUGL(1)) {
 176                         board_print_custom(board, stderr, engine->printhook);
 177                 }
 178                 gtp_reply(id, str, NULL);
 179                 free(str); coord_done(c);
 180
 181         } else if (!strcasecmp(cmd, "set_free_handicap")) {
 182                 struct move m;
 183                 m.color = S_BLACK;
 184
 185                 char *arg;
 186                 next_tok(arg);
 187                 do {
 188                         coord_t *c = str2coord(arg, board_size(board));
 189                         m.coord = *c; coord_done(c);
 190                         if (DEBUGL(1))
 191                                 fprintf(stderr, "setting handicap %d,%d\n", coord_x(m.coord, board), coord_y(m.coord, board));
 192
 193                         if (board_play(board, &m) < 0) {
 194                                 if (DEBUGL(0))
 195                                         fprintf(stderr, "! ILLEGAL MOVE %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 196                                 gtp_error(id, "illegal move", NULL);
 197                         }
 198                         board->handicap++;
 199                         next_tok(arg);
 200                 } while (*arg);
 201                 if (DEBUGL(1))
 202                         board_print(board, stderr);
 203                 gtp_reply(id, NULL);
 204
 205         /* TODO: Engine should choose free handicap; however, it tends to take
 206          * overly long to think it all out, and unless it's clever its
 207          * handicap stones won't be of much help. ;-) */
 208         } else if (!strcasecmp(cmd, "place_free_handicap")
 209                   || !strcasecmp(cmd, "fixed_handicap")) {
 210                 char *arg;
 211                 next_tok(arg);
 212                 int stones = atoi(arg);
 213
 214                 gtp_prefix('=', id);
 215                 board_handicap(board, stones, stdout);
 216                 if (DEBUGL(1))
 217                         board_print(board, stderr);
 218                 putchar('\n');
 219                 gtp_flush();
 220
 221         } else if (!strcasecmp(cmd, "final_score")) {
 222                 struct move_queue q = { .moves = 0 };
 223                 if (engine->dead_group_list)
 224                         engine->dead_group_list(engine, board, &q);
 225                 float score = board_official_score(board, &q);
 226                 char str[64];
 227                 if (DEBUGL(1))
 228                         fprintf(stderr, "counted score %.1f\n", score);
 229                 if (score == 0) {
 230                         gtp_reply(id, "0", NULL);
 231                 } else if (score > 0) {
 232                         snprintf(str, 64, "W+%.1f", score);
 233                         gtp_reply(id, str, NULL);
 234                 } else {
 235                         snprintf(str, 64, "B+%.1f", -score);
 236                         gtp_reply(id, str, NULL);
 237                 }
 238
 239         /* XXX: This is a huge hack. */
 240         } else if (!strcasecmp(cmd, "final_status_list")) {
 241                 char *arg;
 242                 next_tok(arg);
 243                 struct move_queue q = { .moves = 0 };
 244                 if (engine->dead_group_list)
 245                         engine->dead_group_list(engine, board, &q);
 246                 /* else we return empty list - i.e. engine not supporting
 247                  * this assumes all stones alive at the game end. */
 248                 if (!strcasecmp(arg, "dead")) {
 249                         gtp_prefix('=', id);
 250                         for (int i = 0; i < q.moves; i++) {
 251                                 foreach_in_group(board, q.move[i]) {
 252                                         printf("%s ", coord2sstr(c, board));
 253                                 } foreach_in_group_end;
 254                                 putchar('\n');
 255                         }
 256                         if (!q.moves)
 257                                 putchar('\n');
 258                         gtp_flush();
 259                 } else if (!strcasecmp(arg, "seki") || !strcasecmp(arg, "alive")) {
 260                         gtp_prefix('=', id);
 261                         bool printed_group = false;
 262                         foreach_point(board) { // foreach_group, effectively
 263                                 group_t g = group_at(board, c);
 264                                 if (!g || g != c) continue;
 265
 266                                 for (int i = 0; i < q.moves; i++) {
 267                                         if (q.move[i] == g)
 268                                                 goto next_group;
 269                                 }
 270                                 foreach_in_group(board, g) {
 271                                         printf("%s ", coord2sstr(c, board));
 272                                 } foreach_in_group_end;
 273                                 putchar('\n');
 274                                 printed_group = true;
 275 next_group:;
 276                         } foreach_point_end;
 277                         if (!printed_group)
 278                                 putchar('\n');
 279                         gtp_flush();
 280                 } else {
 281                         gtp_error(id, "illegal status specifier", NULL);
 282                 }
 283
 284         /* Custom commands for handling UCT opening book */
 285         } else if (!strcasecmp(cmd, "uct_genbook")) {
 286                 /* Board must be initialized properly, as if for genmove;
 287                  * makes sense only as 'uct_genbook b'. */
 288                 char *arg;
 289                 next_tok(arg);
 290                 enum stone color = str2stone(arg);
 291                 if (uct_genbook(engine, board, color))
 292                         gtp_reply(id, NULL);
 293                 else
 294                         gtp_error(id, "error generating book", NULL);
 295
 296         } else if (!strcasecmp(cmd, "uct_dumpbook")) {
 297                 char *arg;
 298                 next_tok(arg);
 299                 enum stone color = str2stone(arg);
 300                 uct_dumpbook(engine, board, color);
 301                 gtp_reply(id, NULL);
 302
 303         } else if (!strcasecmp(cmd, "kgs-chat")) {
 304                 char *loc;
 305                 next_tok(loc);
 306                 char *src;
 307                 next_tok(src);
 308                 char *msg;
 309                 next_tok(msg);
 310                 char *reply = NULL;
 311                 if (engine->chat)
 312                         reply = engine->chat(engine, board, msg);
 313                 if (reply)
 314                         gtp_reply(id, reply, NULL);
 315                 else
 316                         gtp_error(id, "unknown chat command", NULL);
 317
 318         } else {
 319                 gtp_error(id, "unknown command", NULL);
 320         }
 321
 322 #undef next_tok
 323 }