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