gtp.c

   1 #include <assert.h>
   2 #include <ctype.h>
   3 #include <stdarg.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 #include "board.h"
   9 #include "debug.h"
  10 #include "engine.h"
  11 #include "gtp.h"
  12 #include "uct/uct.h"
  13 #include "version.h"
  14
  15 void
  16 gtp_prefix(char prefix, int id)
  17 {
  18         if (id >= 0)
  19                 printf("%c%d ", prefix, id);
  20         else
  21                 printf("%c ", prefix);
  22 }
  23
  24 void
  25 gtp_output(char prefix, int id, va_list params)
  26 {
  27         gtp_prefix(prefix, id);
  28         char *s;
  29         while ((s = va_arg(params, char *))) {
  30                 fputs(s, stdout);
  31         }
  32         putchar('\n'); putchar('\n');
  33         fflush(stdout);
  34 }
  35
  36 void
  37 gtp_reply(int id, ...)
  38 {
  39         va_list params;
  40         va_start(params, id);
  41         gtp_output('=', id, params);
  42         va_end(params);
  43 }
  44
  45 void
  46 gtp_error(int id, ...)
  47 {
  48         va_list params;
  49         va_start(params, id);
  50         gtp_output('?', id, params);
  51         va_end(params);
  52 }
  53
  54
  55 /* XXX: THIS IS TOTALLY INSECURE!!!!
  56  * Even basic input checking is missing. */
  57
  58 void
  59 gtp_parse(struct board *board, struct engine *engine, char *buf)
  60 {
  61 #define next_tok(to_) \
  62         to_ = next; \
  63         next = next + strcspn(next, " \t\r\n"); \
  64         if (*next) { \
  65                 *next = 0; next++; \
  66                 next += strspn(next, " \t\r\n"); \
  67         }
  68
  69         if (strchr(buf, '#'))
  70                 *strchr(buf, '#') = 0;
  71
  72         char *cmd, *next = buf;
  73         next_tok(cmd);
  74
  75         int id = -1;
  76         if (isdigit(*cmd)) {
  77                 id = atoi(cmd);
  78                 next_tok(cmd);
  79         }
  80
  81         if (!*cmd)
  82                 return;
  83
  84         if (!strcasecmp(cmd, "protocol_version")) {
  85                 gtp_reply(id, "2", NULL);
  86
  87         } else if (!strcasecmp(cmd, "name")) {
  88                 /* KGS hack */
  89                 gtp_reply(id, "Pachi ", engine->name, NULL);
  90
  91         } else if (!strcasecmp(cmd, "version")) {
  92                 gtp_reply(id, PACHI_VERSION, ": ", engine->comment, NULL);
  93
  94                 /* TODO: known_command */
  95
  96         } else if (!strcasecmp(cmd, "list_commands")) {
  97                 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", NULL);
  98
  99         } else if (!strcasecmp(cmd, "quit")) {
 100                 gtp_reply(id, NULL);
 101                 exit(0);
 102
 103         } else if (!strcasecmp(cmd, "boardsize")) {
 104                 char *arg;
 105                 next_tok(arg);
 106                 board_resize(board, atoi(arg));
 107
 108                 gtp_reply(id, NULL);
 109
 110         } else if (!strcasecmp(cmd, "clear_board")) {
 111                 board_clear(board);
 112                 gtp_reply(id, NULL);
 113
 114         } else if (!strcasecmp(cmd, "komi")) {
 115                 char *arg;
 116                 next_tok(arg);
 117                 sscanf(arg, "%f", &board->komi);
 118
 119                 gtp_reply(id, NULL);
 120
 121         } else if (!strcasecmp(cmd, "play")) {
 122                 struct move m;
 123
 124                 char *arg;
 125                 next_tok(arg);
 126                 m.color = str2stone(arg);
 127                 next_tok(arg);
 128                 coord_t *c = str2coord(arg, board_size(board));
 129                 m.coord = *c; coord_done(c);
 130
 131                 if (DEBUGL(1))
 132                         fprintf(stderr, "got move %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 133                 engine->notify_play(engine, board, &m);
 134                 if (board_play(board, &m) < 0) {
 135                         if (DEBUGL(0)) {
 136                                 fprintf(stderr, "! ILLEGAL MOVE %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 137                                 board_print(board, stderr);
 138                         }
 139                         gtp_error(id, "illegal move", NULL);
 140                 } else {
 141                         gtp_reply(id, NULL);
 142                 }
 143
 144         } else if (!strcasecmp(cmd, "genmove")) {
 145                 char *arg;
 146                 next_tok(arg);
 147                 enum stone color = str2stone(arg);
 148                 coord_t *c = engine->genmove(engine, board, color);
 149                 struct move m = { *c, color };
 150                 board_play(board, &m);
 151                 char *str = coord2str(*c, board);
 152                 if (DEBUGL(1))
 153                         fprintf(stderr, "playing move %s\n", str);
 154                 gtp_reply(id, str, NULL);
 155                 free(str); coord_done(c);
 156
 157         } else if (!strcasecmp(cmd, "set_free_handicap")) {
 158                 struct move m;
 159                 m.color = S_BLACK;
 160
 161                 char *arg;
 162                 next_tok(arg);
 163                 do {
 164                         coord_t *c = str2coord(arg, board_size(board));
 165                         m.coord = *c; coord_done(c);
 166                         if (DEBUGL(1))
 167                                 fprintf(stderr, "setting handicap %d,%d\n", coord_x(m.coord, board), coord_y(m.coord, board));
 168
 169                         if (board_play(board, &m) < 0) {
 170                                 if (DEBUGL(0))
 171                                         fprintf(stderr, "! ILLEGAL MOVE %d,%d,%d\n", m.color, coord_x(m.coord, board), coord_y(m.coord, board));
 172                                 gtp_error(id, "illegal move", NULL);
 173                         }
 174                         next_tok(arg);
 175                 } while (*arg);
 176                 gtp_reply(id, NULL);
 177
 178         /* TODO: Engine should choose free handicap; however, it tends to take
 179          * overly long to think it all out, and unless it's clever its
 180          * handicap stones won't be of much help. ;-) */
 181         } else if (!strcasecmp(cmd, "place_free_handicap")
 182                   || !strcasecmp(cmd, "fixed_handicap")) {
 183                 char *arg;
 184                 next_tok(arg);
 185                 int stones = atoi(arg);
 186
 187                 gtp_prefix('=', id);
 188                 board_handicap(board, stones, stdout);
 189                 printf("\n\n"); fflush(stdout);
 190
 191         } else if (!strcasecmp(cmd, "final_score")) {
 192                 float score = board_official_score(board);
 193                 char str[64];
 194                 if (DEBUGL(1))
 195                         fprintf(stderr, "counted score %.1f\n", score);
 196                 if (score == 0) {
 197                         gtp_reply(id, "0", NULL);
 198                 } else if (score > 0) {
 199                         snprintf(str, 64, "W+%.1f", score);
 200                         gtp_reply(id, str, NULL);
 201                 } else {
 202                         snprintf(str, 64, "B+%.1f", -score);
 203                         gtp_reply(id, str, NULL);
 204                 }
 205
 206         /* XXX: This is a huge hack. */
 207         } else if (!strcasecmp(cmd, "final_status_list")) {
 208                 char *arg;
 209                 next_tok(arg);
 210                 assert(!strcasecmp(arg, "dead")); // yes, I know...
 211                 gtp_reply(id, "", NULL);
 212
 213         /* Custom commands for handling UCT opening book */
 214         } else if (!strcasecmp(cmd, "uct_genbook")) {
 215                 /* Board must be initialized properly, as if for genmove;
 216                  * makes sense only as 'uct_genbook b'. */
 217                 char *arg;
 218                 next_tok(arg);
 219                 enum stone color = str2stone(arg);
 220                 if (uct_genbook(engine, board, color))
 221                         gtp_reply(id, NULL);
 222                 else
 223                         gtp_error(id, "error generating book", NULL);
 224
 225         } else if (!strcasecmp(cmd, "uct_dumpbook")) {
 226                 char *arg;
 227                 next_tok(arg);
 228                 enum stone color = str2stone(arg);
 229                 uct_dumpbook(engine, board, color);
 230                 gtp_reply(id, NULL);
 231
 232         } else {
 233                 gtp_error(id, "unknown command", NULL);
 234         }
 235
 236 #undef next_tok
 237 }