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