UCI2WB.c

   1 /****************************************************************************/
   2 /*                           UCI2WB by H.G.Muller                           */
   3 /*                                                                          */
   4 /* UCI2WB is an adapter to run engines that communicate in various dialects */
   5 /* of the Universal Chess Interface in a GUI that supports XBoard protocol  */
   6 /* (CECP). It supports UCI (when used for Xiangqi: the 'Cyclone dialect'),  */
   7 /* as well as USI and UCCI when used with the flags -s or -x, respectively. */
   8 /* This version of UCI2WB is released under the GNU General Public License, */
   9 /* of which you should have received a copy together with this file.        */
  10 /****************************************************************************/
  11
  12 #define VERSION "2.0"
  13
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #ifdef WIN32
  17 #  include <windows.h>
  18 #  include <io.h>
  19    HANDLE process;
  20    DWORD thread_id;
  21 #else
  22 #  include <pthread.h>
  23 #  include <signal.h>
  24 #  define NO_ERROR 0
  25 #  include <sys/time.h>
  26    int GetTickCount() // with thanks to Tord
  27    { struct timeval t; gettimeofday(&t, NULL); return t.tv_sec*1000 + t.tv_usec/1000; }
  28 #endif
  29 #include <fcntl.h>
  30 #include <string.h>
  31
  32 // Set VARIANTS for in WinBoard variant feature. (With -s option this will always be reset to use "shogi".)
  33 #  define VARIANTS "normal,xiangqi"
  34
  35 #define DPRINT if(debug) printf
  36
  37 #define WHITE 0
  38 #define BLACK 1
  39 #define NONE  2
  40 #define ANALYZE 3
  41
  42 char move[2000][10], checkOptions[8192], iniPos[256], hashOpt[20], pause, pondering, suspended, ponder, post, hasHash, c, sc='c', *suffix, *variants;
  43 int mps, tc, inc, sTime, depth, myTime, hisTime, stm, computer = NONE, memory, oldMem=0, cores, moveNr, lastDepth, lastScore, startTime, debug;
  44 int statDepth, statScore, statNodes, statTime, currNr, size, collect, nr, sm, inex, on[500], frc;
  45 char currMove[20], moveMap[500][10], /* for analyze mode */ canPonder[20], threadOpt[20];
  46 char board[100];  // XQ board for UCCI
  47 char *nameWord = "name ", *valueWord = "value ", *wTime = "w", *bTime = "b", *wInc = "winc", *bInc = "binc", newGame; // keywords that differ in UCCI
  48 int unit = 1, drawOffer;
  49
  50 FILE *toE, *fromE, *fromF;
  51 int pid;
  52
  53 #ifdef WIN32
  54 WinPipe(HANDLE *hRd, HANDLE *hWr)
  55 {
  56   SECURITY_ATTRIBUTES saAttr;
  57
  58   /* Set the bInheritHandle flag so pipe handles are inherited. */
  59   saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
  60   saAttr.bInheritHandle = TRUE;
  61   saAttr.lpSecurityDescriptor = NULL;
  62
  63   /* Create a pipe */
  64   return CreatePipe(hRd, hWr, &saAttr, 0);
  65 }
  66 #endif
  67
  68 #define INIT 0
  69 #define WAKEUP 1
  70 #define PAUSE 2
  71
  72 void
  73 Sync (int action)
  74 {
  75 #ifdef WIN32
  76         static HANDLE hWr, hRd; DWORD d; char c;
  77         switch(action) {
  78             case INIT:   WinPipe(&hRd, &hWr); break;
  79             case WAKEUP: WriteFile(hWr, "\n", 1, &d, NULL); break;
  80             case PAUSE:  ReadFile(hRd, &c, 1, &d, NULL);
  81         }
  82 #else
  83         static int syncPipe[2]; char c;
  84         switch(action) {
  85             case INIT:   pipe(syncPipe); break;
  86             case WAKEUP: write(syncPipe[1], "\n", 1); break;
  87             case PAUSE:  read(syncPipe[0], &c, 1);
  88         }
  89 #endif
  90 }
  91
  92 void
  93 FromFEN(char *fen)
  94 {       int i=0;
  95         while(*fen) {
  96             char c = *fen++;
  97             if(c >= 'A') board[i++] = c; else
  98             if(c == '/') i++; else
  99             if(c == ' ') break; else
 100             while(c-- > '0' && i < 99) board[i++] = 0;
 101             if(i >= 99) break;
 102         }
 103 }
 104
 105 char *
 106 ToFEN(int stm)
 107 {
 108         int i, n=0; static char fen[200]; char *p = fen;
 109         for(i=0; i<99; i++) {
 110             char c = board[i];
 111             if(c >= 'A')  { if(n) *p++ = '0' + n; n = 0;  *p++ = c; } else n ++;
 112             if(i%10 == 8) { if(n) *p++ = '0' + n; n = -1; *p++ = '/'; }
 113         }
 114         sprintf(p-1, " %c - - 0 1", stm);
 115         return fen;
 116 }
 117
 118 int
 119 Sqr(char *m, int j)
 120 {
 121         int n = m[j] - 'a' + 10*('9' - m[j+1]);
 122         if(n < 0) n = 0; else if(n > 99) n = 99; return n;
 123 }
 124
 125 int
 126 Play(int nr)
 127 {
 128         int i, last = -1;
 129         FromFEN(iniPos + 4); // in XQ iniPos always has just "fen " prefix
 130         for(i=0; i<nr; i++) {
 131             int from=Sqr(move[i], 0), to=Sqr(move[i], 2);
 132             if(board[to] || (board[from]|32)  == 'p' && move[i][1] != move[i][3]) last = i;
 133             board[to] = board[from]; board[from] = 0;
 134         }
 135         return last;
 136 }
 137
 138 void
 139 StartSearch(char *ponder)
 140 {       // send the 'go' command to engine. Suffix by ponder.
 141         int x = (ponder[0] != 0);                   // during ponder stm is the opponent
 142         int black = (stm == BLACK ^ x ^ sc == 's'); // set if our color is what the engine calls black
 143         int nr = moveNr + x;                        // we ponder for one move ahead!
 144         if(sc == 'x') black = 1; else drawOffer = 0;// in UCCI 'black' refers to us and 'white' to opponent
 145         if(!x && drawOffer) ponder = " draw", drawOffer = 0; //pass draw offer only when not pondering
 146         fprintf(toE, "\ngo%s %stime %d %stime %d", ponder, bTime, black ? myTime : hisTime, wTime, !black ? myTime : hisTime);
 147         DPRINT(    "\n# go%s %stime %d %stime %d", ponder, bTime, black ? myTime : hisTime, wTime, !black ? myTime : hisTime);
 148         if(sTime > 0) { fprintf(toE, " movetime %d", sTime); DPRINT(" movetime %d", sTime); } else
 149         if(mps) { fprintf(toE, " movestogo %d", mps*(nr/(2*mps)+1)-nr/2); DPRINT(" movestogo %d", mps*(nr/(2*mps)+1)-nr/2); }
 150         if(inc && !suffix) { fprintf(toE, " %s %d %s %d", wInc, inc, bInc, inc); DPRINT(" %s %d %s %d", wInc, inc, bInc, inc); }
 151         if(depth > 0) { fprintf(toE, " depth %d", depth); DPRINT(" depth %d", depth); }
 152         if(suffix) { fprintf(toE, suffix, inc); DPRINT(suffix, inc); }
 153         fprintf(toE, "\n"); DPRINT("\n");
 154 }
 155
 156 void
 157 StopPonder(int pondering)
 158 {
 159         if(!pondering) return;
 160         pause = 1;
 161         fprintf(toE, "stop\n"); fflush(toE); DPRINT("# stop\n"); // note: 'pondering' remains set until engine acknowledges 'stop' with 'bestmove'
 162         Sync(PAUSE); // wait for engine to acknowledge 'stop' with 'bestmove'.
 163 }
 164
 165 void
 166 LoadPos(int moveNr)
 167 {
 168         int j, lastCapt = 0; char *pos = iniPos, buf[200], stm;
 169         if(sc == 'x') { // UCCI: send only reversible moves
 170             lastCapt = Play(moveNr); // find last capture (returns -1 if none!)
 171             Play(++lastCapt);        // reconstruct board after last capture
 172             stm = (!strstr(iniPos+4, " b ") ^ lastCapt & 1 ? 'w' :  'b');
 173             sprintf(buf, "position fen %s", ToFEN(stm)); pos = buf; // send it as FEN (with "position" in UCCI!)
 174         }
 175         fprintf(toE, "%s moves", pos);
 176         DPRINT(    "# %s moves", pos);
 177         for(j=lastCapt; j<moveNr; j++) { fprintf(toE, " %s", move[j]); DPRINT(" %s", move[j]); }
 178 }
 179
 180 void
 181 StartPonder()
 182 {
 183         if(!move[moveNr][0]) return; // no ponder move
 184         LoadPos(moveNr+1);
 185         pondering = 1; lastDepth = 1;
 186         StartSearch(" ponder");
 187 }
 188
 189 char *Convert(char *pv)
 190 {   // convert Shogi coordinates to WB
 191     char *p, *q, c;
 192     static char buf[10000];
 193     if(sc != 's') return pv;
 194     p = pv; q = buf;
 195     while(c = *p++) {
 196         if(c >= '0' && c <= '9' || c >= 'a' && c <= 'z') *q++ = 'a'+'0'+size - c; else *q++ = c;
 197     }
 198     *q++ = 0;
 199     return buf;
 200 }
 201
 202 void
 203 Move4GUI(char *m)
 204 {
 205     if(sc == 's') {
 206       // convert USI move to WB format
 207       m[2] = 'a'+'0'+size - m[2];
 208       m[3] = 'a'+'0'+size - m[3];
 209       if(m[1] == '*') { // drop
 210         m[1] = '@';
 211       } else {
 212         m[0] = 'a'+'0'+size - m[0];
 213         m[1] = 'a'+'0'+size - m[1];
 214         if((stm == WHITE ? (m[1]>'0'+size-size/3 || m[3]>'0'+size-size/3)
 215                                 : (m[1] <= '0'+size/3 || m[3] <= '0'+size/3)) && m[4] != '+')
 216              m[4] = '=', m[5] = 0;
 217       }
 218     }
 219 }
 220
 221 int
 222 GetChar()
 223 {
 224     int c;
 225     if(fromF) {
 226         if((c = fgetc(fromF)) != EOF) return c;
 227         fclose(fromF); fromF = 0; printf("# end fake\n");
 228     }
 229     return fgetc(fromE);
 230 }
 231
 232 void *
 233 Engine2GUI()
 234 {
 235     char line[1024], command[256];
 236
 237     if(fromF = fopen("DefectiveEngineOptions.ini", "r")) printf("# fake engine input\n");
 238     while(1) {
 239         int i=0, x; char *p, dummy;
 240
 241         fflush(stdout); fflush(toE);
 242         while((line[i] = x = GetChar()) != EOF && line[i] != '\n') i++;
 243         line[++i] = 0;
 244         if(x == EOF) exit(0);
 245         DPRINT("# engine said: %s", line), fflush(stdout);
 246         if(sscanf(line, "%s", command) != 1) continue;
 247         if(!strcmp(command, "bestmove")) {
 248             if(pause == 1) { pondering = pause = 0; Sync(WAKEUP); continue; } // bestmove was reply to ponder miss or analysis result; ignore.
 249             else if(pondering) { pondering = 0; printf("%d 0 0 0 UCI violation! Engine moves during ponder\n", lastDepth+1); continue; } // ignore ponder search
 250             // move was a move to be played
 251             if(p = strstr(line+8, " draw")) *p = 0, printf("offer draw\n"); // UCCI
 252             if(strstr(line+9, "resign")) { printf("resign\n"); computer = NONE; }
 253             if(strstr(line+9, "(none)") || strstr(line+9, "null") ||
 254                strstr(line+9, "0000")) { printf("%s\n", lastScore < -99999 ? "resign" : "1/2-1/2 {stalemate}"); computer = NONE; }
 255             sscanf(line, "bestmove %s", move[moveNr++]);
 256             myTime -= (GetTickCount() - startTime)*1.02 + inc; // update own clock, so we can give correct wtime, btime with ponder
 257             if(mps && ((moveNr+1)/2) % mps == 0) myTime += tc; if(sTime) myTime = sTime; // new session or move starts
 258             stm = WHITE+BLACK - stm;
 259             // first start a new ponder search, if pondering is on and we have a move to ponder on
 260             if(p = strstr(line+9, "ponder")) {
 261               sscanf(p+7, "%s", move[moveNr]);
 262               if(computer != NONE && ponder) {
 263                 DPRINT("# ponder on %s\n", move[moveNr]);
 264                 StartPonder();
 265               }
 266               p[-1] = '\n'; *p = 0; // strip off ponder move
 267             } else move[moveNr][0] = 0;
 268             Move4GUI(line+9);
 269             printf("move %s\n", line+9); // send move to GUI
 270             if(pause) { pause = 0; Sync(WAKEUP); } // release commands that came in during think
 271             if(lastScore == 100001 && iniPos[0] != 'f') { printf("%s {mate}\n", stm == BLACK ? "1-0" : "0-1"); computer = NONE; }
 272         }
 273         else if(!strcmp(command, "info")) {
 274             int d=0, s=0, t=(GetTickCount() - startTime)/10, n=1;
 275             char *pv;
 276             if(sscanf(line+5, "string times @ %c", &dummy) == 1) { printf("# %s", line+12); continue; }
 277             if(collect && (pv = strstr(line+5, "currmove "))) {
 278                 if(p = strstr(line+5, "currmovenumber ")) {
 279                     n = atoi(p+15);
 280                     if(collect == 1 && n != 1) continue; // wait for move 1
 281                     if(collect + (n == 1) > 2) { // done collecting
 282                         if(inex && collect == 2) printf("%d 0 0 0 OK to exclude\n", lastDepth);
 283                         collect = 3; continue;
 284                     }
 285                     collect = 2; on[nr=n] = 1; sscanf(pv+9, "%s", moveMap[n]); continue; // store move
 286                 }
 287             }
 288             if(!post) continue;
 289             if(sscanf(line+5, "string %c", &dummy) == 1) printf("%d 0 0 0 %s", lastDepth, line+12); else {
 290                 if(p = strstr(line+4, " depth "))      sscanf(p+7, "%d", &d), statDepth = d;
 291                 if(p = strstr(line+4, " score cp "))   sscanf(p+10, "%d", &s), statScore = s; else
 292                 if(p = strstr(line+4, " score mate ")) sscanf(p+12, "%d", &s), s += s>0 ? 100000 : -100000, statScore = s; else
 293                 if(p = strstr(line+4, " score "))      sscanf(p+7, "%d", &s), statScore = s;
 294                 if(p = strstr(line+4, " nodes "))      sscanf(p+7, "%d", &n), statNodes = n;
 295                 if(p = strstr(line+4, " time "))       sscanf(p+6, "%d", &t), t /= 10, statTime = t;
 296                 if(p = strstr(line+4, " currmove "))   sscanf(p+10,"%s", currMove);
 297                 if(p = strstr(line+4, " currmovenumber ")) sscanf(p+16,"%d", &currNr);
 298                 if(pv = strstr(line+4, " pv ")) // convert PV info to WB thinking output
 299                     printf("%3d  %6d %6d %10d %s", lastDepth=d, lastScore=s, t, n, Convert(pv+4));
 300             }
 301         }
 302         else if(!strcmp(command, "option")) { // USI option: extract data fields
 303             char name[80], type[80], buf[1024], val[256], *q;
 304             int min=0, max=1e9;
 305             if(p = strstr(line+6, " type ")) sscanf(p+1, "type %s", type), *p = '\n';
 306             if(p = strstr(line+6, " min "))  sscanf(p+1, "min %d", &min), *p = '\n';
 307             if(p = strstr(line+6, " max "))  sscanf(p+1, "max %d", &max), *p = '\n';
 308             if(p = strstr(line+6, " default "))  sscanf(p+1, "default %[^\n]*", val), *p = '\n';
 309             if(!(p = strstr(line+6, " name "))) p = line+1; sscanf(p+6, "%[^\n]", name); // 'name' is omitted in UCCI
 310             if(!strcasecmp(name, "UCI_Chess960")) { frc=2; continue; }
 311             if(frc< 0 && (strstr(name, "960") || strcasestr(name, "frc")) && !strcmp(type, "check")) {
 312                 fprintf(toE, "setoption name %s value true\n", name); strcpy(val, "true"); // set non-standard suspected FRC options
 313             }
 314             if(!strcasecmp(name, "Threads")) { strcpy(threadOpt, name); continue; }
 315             if(!strcasecmp(name, "Ponder") || !strcasecmp(name, "USI_Ponder")) { strcpy(canPonder, name); continue; }
 316             if(!strcasecmp(name, "Hash") || !strcasecmp(name, "USI_Hash") || !strcasecmp(name, "hashsize")) {
 317                 memory = oldMem = atoi(val); hasHash = 1;
 318                 strcpy(hashOpt, name);
 319                 continue;
 320             }
 321             if(!strcasecmp(name, "newgame") && !strcmp(type, "button")) { newGame++; continue; }
 322             if(!strcasecmp(name, "usemillisec")) { unit = (!strcmp(val, "false") ? 2 : 1); continue; }
 323             // pass on engine-defined option as WB option feature
 324             if(!strcmp(type, "filename")) type[4] = 0;
 325             sprintf(buf, "feature option=\"%s -%s", name, type); q = buf + strlen(buf);
 326             if(     !strcmp(type, "file")
 327                  || !strcmp(type, "string")) sprintf(q, " %s\"\n", val);
 328             else if(!strcmp(type, "spin"))   sprintf(q, " %d %d %d\"\n", atoi(val), min, max);
 329             else if(!strcmp(type, "check"))  sprintf(q, " %d\"\n", strcmp(val, "true") ? 0 : 1), strcat(checkOptions, name);
 330             else if(!strcmp(type, "button")) sprintf(q, "\"\n");
 331             else if(!strcmp(type, "combo")) {
 332                 if(p = strstr(line+6, " default "))  sscanf(p+1, "default %s", type); // current setting
 333                 min = 0; p = line+6;
 334                 while(p = strstr(p, " var ")) {
 335                     sscanf(p += 5, "%s", val); // next choice
 336                     sprintf(buf + strlen(buf), "%s%s%s", min++ ? " /// " : " ", strcmp(type, val) ? "" : "*", val);
 337                 }
 338                 strcat(q, "\"\n");
 339             }
 340             else buf[0] = 0; // ignore unrecognized option types
 341             if(buf[0]) printf("%s", buf);
 342         }
 343         else if(!strcmp(command, "id")) {
 344             static char name[256], version[256];
 345             if(sscanf(line, "id name %[^\n]", name) == 1) printf("feature myname=\"%s (U%cI2WB)\"\n", name, sc-32);
 346             if(sscanf(line, "id version %[^\n]", version) == 1 && *name) printf("feature myname=\"%s %s (U%cI2WB)\"\n", name, version, sc-32);
 347         }
 348         else if(!strcmp(command, "readyok")) { pause = 0; Sync(WAKEUP); } // resume processing of GUI commands
 349         else if(sc == 'x'&& !strcmp(command, "ucciok") || sscanf(command, "u%ciok", &c)==1 && c==sc) {
 350             if(frc) printf("feature variants=\"normal,fischerandom\" oocastle=%d\n", frc<0); // unannounced FRC uses O-O castling
 351             printf("feature smp=1 memory=%d done=1\n", hasHash);
 352             if(unit == 2) unit = 1, fprintf(toE, "setoption usemillisec true\n");
 353             Sync(WAKEUP); // done with options
 354         }
 355     }
 356 }
 357
 358 void
 359 Move4Engine(char *m)
 360 {
 361     if(sc == 's') {
 362       // convert input move to USI format
 363       if(m[1] == '@') { // drop
 364         m[1] = '*';
 365       } else {
 366         m[0] = 'a'+'0'+size - m[0];
 367         m[1] = 'a'+'0'+size - m[1];
 368       }
 369       m[2] = 'a'+'0'+size - m[2];
 370       m[3] = 'a'+'0'+size - m[3];
 371       if(m[4] == '=') m[4] = 0; // no '=' in USI format!
 372       else if(m[4]) m[4] = '+'; // cater to WB 4.4 bug :-(
 373     }
 374 }
 375
 376 void
 377 GUI2Engine()
 378 {
 379     char line[256], command[256], *p, *q, *r;
 380
 381     while(1) {
 382         int i, x;
 383
 384         if((computer == stm || computer == ANALYZE) && !suspended) {
 385             DPRINT("# start search\n");
 386             LoadPos(moveNr); fflush(stdout); // load position
 387             // and set engine thinking (note USI swaps colors!)
 388             startTime = GetTickCount();
 389             if(computer == ANALYZE) {
 390                 fprintf(toE, "\ngo infinite"); DPRINT("\n# go infinite");
 391                 if(sm & 1) { // some moves are disabled
 392                     fprintf(toE, " searchmoves"); DPRINT(" searchmoves");
 393                     for(i=1; i<nr; i++) if(on[i]) { fprintf(toE, " %s", moveMap[i]); DPRINT(" %s", moveMap[i]); }
 394                 }
 395                 fprintf(toE, "\n"); DPRINT("\n");
 396             // code for searchmoves goes here
 397             } else { pause = 2; StartSearch(""); fflush(stdout); fflush(toE); Sync(PAUSE); } // block input during thinking
 398         }
 399       nomove:
 400         fflush(toE); fflush(stdout);
 401         i = 0; while((x = getchar()) != EOF && (line[i] = x) != '\n') i++;
 402         line[++i] = 0; if(x == EOF) { printf("# EOF\n"); fprintf(toE, "quit\n"); exit(-1); }
 403         sscanf(line, "%s", command);
 404         if(!strcmp(command, "new")) {
 405             computer = BLACK; moveNr = 0; depth = -1; move[0][0] = 0;
 406             stm = WHITE; strcpy(iniPos, "position startpos"); frc &= ~1;
 407             if(memory != oldMem && hasHash) fprintf(toE, "setoption %s%s %s%d\n", nameWord, hashOpt, valueWord, memory);
 408             oldMem = memory;
 409             // we can set other options here
 410             if(sc == 'x') { if(newGame) fprintf(toE, "setoption newgame\n"); } else // optional in UCCI
 411             pause = 1; // wait for option settings to take effect
 412             fprintf(toE, "isready\n"); fflush(toE);
 413             Sync(PAUSE); // wait for readyok
 414             fprintf(toE, "u%cinewgame\n", sc); fflush(toE);
 415         }
 416         else if(!strcmp(command, "usermove")) {
 417             sscanf(line, "usermove %s", command); // strips off linefeed
 418             Move4Engine(command);
 419             stm = WHITE+BLACK - stm; collect = (computer == ANALYZE); sm = 0;
 420             // when pondering we either continue the ponder search as normal search, or abort it
 421             if(pondering || computer == ANALYZE) {
 422                 if(pondering && !strcmp(command, move[moveNr])) { // ponder hit
 423                     char *draw = drawOffer ? " draw" : ""; drawOffer = 0;
 424                     pondering = 0; pause = 2; moveNr++; startTime = GetTickCount(); // clock starts running now
 425                     fprintf(toE, "ponderhit%s\n", draw); DPRINT("# ponderhit%s\n", draw); fflush(toE); fflush(stdout);
 426                     Sync(PAUSE); // block input during thinking
 427                     goto nomove;
 428                 }
 429                 StopPonder(1);
 430             }
 431             strcpy(move[moveNr++], command); // possibly overwrites ponder move
 432         }
 433         else if(!strcmp(command, "level")) {
 434             int sec = 0;
 435             sscanf(line, "level %d %d:%d %d", &mps, &tc, &sec, &inc) == 4 ||
 436             sscanf(line, "level %d %d %d", &mps, &tc, &inc);
 437             tc = (60*tc + sec)*1000; inc *= 1000; sTime = 0; tc /= unit; inc /= unit;
 438         }
 439         else if(!strcmp(command, "option")) {
 440             char name[80], *p;
 441             if(sscanf(line+7, "UCI2WB debug output=%d", &debug) == 1) ; else
 442             if(p = strchr(line, '=')) {
 443                 *p++ = 0;
 444                 if(strstr(checkOptions, line+7)) sprintf(p, "%s\n", atoi(p) ? "true" : "false");
 445                 fprintf(toE, "setoption name %s value %s", line+7, p); DPRINT("# setoption %s%s %s%s", nameWord, line+7, valueWord, p);
 446             } else { fprintf(toE, "setoption %s%s\n", nameWord, line+7); DPRINT("# setoption %s%s\n", nameWord, line+7); }
 447         }
 448         else if(!strcmp(command, "protover")) {
 449             if(!variants) variants = sc=='s' ? "shogi,5x5+5_shogi" : VARIANTS;
 450             printf("feature variants=\"%s\" setboard=1 usermove=1 debug=1 ping=1 reuse=0 exclude=1 pause=1 sigint=0 sigterm=0 done=0\n", variants);
 451             printf("feature option=\"UCI2WB debug output -check %d\"\n", debug);
 452             fprintf(toE, sc == 'x' ? "ucci\n" : "u%ci\n", sc); fflush(toE); // prompt UCI engine for options
 453             Sync(PAUSE); // wait for uciok
 454         }
 455         else if(!strcmp(command, "setboard")) {
 456                 stm = (strstr(line+9, " b ") ? BLACK : WHITE);
 457                 if(p = strchr(line+9, '[')) { char c;
 458                     *p++ = 0; q = strchr(p, ']'); *q = 0; r = q + 4;
 459                     if(sc == 's') q[2] = 'w' + 'b' - q[2], strcpy(r=q+3, " 1\n"); // Shogi: reverse color
 460                     else r = strchr(strchr(q+4, ' ') + 1, ' '); // skip to second space (after e.p. square)
 461                     *r = 0; sprintf(command, "%s%s %s %s", line+9, q+1, p, r+1);
 462                 } else strcpy(command, line+9);
 463                 if(frc == -1 && (p = strchr(command, ' '))) strncpy(p+3, "KQkq", 4); // unannounced FRC
 464                 sprintf(iniPos, "%s%sfen %s", iniPos[0]=='p' ? "position " : "", sc=='s' ? "s" : "", command);
 465                 iniPos[strlen(iniPos)-1] = sm = 0; collect = (computer == ANALYZE);
 466         }
 467         else if(!strcmp(command, "variant")) {
 468                 if(!strcmp(line+8, "shogi\n")) size = 9, strcpy(iniPos, "position startpos");
 469                 if(!strcmp(line+8, "5x5+5_shogi\n")) size = 5, strcpy(iniPos, "position startpos");
 470                 if(!strcmp(line+8, "xiangqi\n")) strcpy(iniPos, "fen rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR r");
 471                 if(!strcmp(line+8, "fischerandom\n")) { frc |= 1; if(frc > 0) fprintf(toE, "setoption name UCI_Chess960 value true\n"); }
 472         }
 473         else if(!strcmp(command, "undo") && (i=1) || !strcmp(command, "remove") && (i=2)) {
 474             if(pondering || computer == ANALYZE) StopPonder(1);
 475             moveNr = moveNr > i ? moveNr - i : 0; collect = (computer == ANALYZE); sm = 0;
 476         }
 477         else if(!strcmp(command, ".")) {
 478             printf("stat01: %d %d %d %d 100 %s\n", statTime, statNodes, statDepth, 100-currNr, currMove);
 479             goto nomove;
 480         }
 481         else if(!strcmp(command+2, "clude") && collect > 2) { // include or exclude
 482             int all = !strcmp(line+8, "all"), in = command[1] == 'n';
 483             inex = 1; line[strlen(line)-1] = sm = 0; // strip LF and clear sm flag
 484             for(i=1; i<nr; i++) { if(!strcmp(line+8, moveMap[i]) || all) on[i] = in; sm |= on[i]+1; } // sm: 2 = enabled, 1 = disabled
 485             if(!(sm & 2)) goto nomove; // no moves enabled; continue current search
 486             if(computer == ANALYZE) StopPonder(1); // abort old analysis
 487         }
 488         else if(!strcmp(command, "pause")) {
 489             if(computer == stm) myTime -= GetTickCount() - startTime;
 490             suspended = 1 + pondering; // remember if we were pondering, and stop search ignoring bestmove
 491             StopPonder(pondering || computer == stm);
 492         }
 493         else if(!strcmp(command, "resume")) {
 494             if(suspended == 2) StartPonder(); // restart interrupted ponder search
 495             suspended = 0; // causes thinking to start in normal way if on move or analyzing
 496         }
 497         else if(!strcmp(command, "xboard")) ;
 498         else if(!strcmp(command, "analyze"))computer = ANALYZE, collect = 1, sm = 0;
 499         else if(!strcmp(command, "exit"))   computer = NONE, StopPonder(1);
 500         else if(!strcmp(command, "force"))  computer = NONE, StopPonder(pondering);
 501         else if(!strcmp(command, "go"))     computer = stm;
 502         else if(!strcmp(command, "time"))   sscanf(line+4, "%d", &myTime),  myTime  = (10*myTime)/unit;
 503         else if(!strcmp(command, "otim"))   sscanf(line+4, "%d", &hisTime), hisTime = (10*hisTime)/unit;
 504         else if(!strcmp(command, "post"))   post = 1;
 505         else if(!strcmp(command, "nopost")) post = 0;
 506         else if(!strcmp(command, "easy") && !!*canPonder) ponder = 0, StopPonder(pondering), fprintf(toE, "setoption %s%s %sfalse\n", nameWord, canPonder, valueWord);
 507         else if(!strcmp(command, "hard") && !!*canPonder) ponder = 1, fprintf(toE, "setoption %s%s %strue\n", nameWord, canPonder, valueWord), StartPonder();
 508         else if(!strcmp(command, "ping"))   { /* static int done; if(!done) pause = 1, fprintf(toE, "isready\n"), fflush(toE), printf("# send isready\n"), fflush(stdout), Sync(PAUSE); done = 1;*/ printf("po%s", line+2); }
 509         else if(!strcmp(command, "memory")) sscanf(line, "memory %d", &memory);
 510         else if(!strcmp(command, "cores")&& !!*threadOpt) sscanf(line, "cores %d", &cores), fprintf(toE, "setoption %s%s %s%d\n", nameWord, threadOpt, valueWord, cores);
 511         else if(!strcmp(command, "sd"))     sscanf(line, "sd %d", &depth);
 512         else if(!strcmp(command, "st"))     sscanf(line, "st %d", &sTime), sTime = 1000*sTime - 30, inc = 0, sTime /= unit;
 513         else if(!strcmp(command, "offer"))  drawOffer = 1;
 514         else if(!strcmp(command, "quit"))   fprintf(toE, "quit\n"), fflush(toE), exit(0);
 515     }
 516 }
 517
 518 int
 519 StartEngine(char *cmdLine, char *dir)
 520 {
 521 #ifdef WIN32
 522   HANDLE hChildStdinRd, hChildStdinWr,
 523     hChildStdoutRd, hChildStdoutWr;
 524   BOOL fSuccess;
 525   PROCESS_INFORMATION piProcInfo;
 526   STARTUPINFO siStartInfo;
 527   DWORD err;
 528
 529   /* Create a pipe for the child's STDOUT. */
 530   if (! WinPipe(&hChildStdoutRd, &hChildStdoutWr)) return GetLastError();
 531
 532   /* Create a pipe for the child's STDIN. */
 533   if (! WinPipe(&hChildStdinRd, &hChildStdinWr)) return GetLastError();
 534
 535   SetCurrentDirectory(dir); // go to engine directory
 536
 537   /* Now create the child process. */
 538   siStartInfo.cb = sizeof(STARTUPINFO);
 539   siStartInfo.lpReserved = NULL;
 540   siStartInfo.lpDesktop = NULL;
 541   siStartInfo.lpTitle = NULL;
 542   siStartInfo.dwFlags = STARTF_USESTDHANDLES;
 543   siStartInfo.cbReserved2 = 0;
 544   siStartInfo.lpReserved2 = NULL;
 545   siStartInfo.hStdInput = hChildStdinRd;
 546   siStartInfo.hStdOutput = hChildStdoutWr;
 547   siStartInfo.hStdError = hChildStdoutWr;
 548
 549   fSuccess = CreateProcess(NULL,
 550                            cmdLine,        /* command line */
 551                            NULL,           /* process security attributes */
 552                            NULL,           /* primary thread security attrs */
 553                            TRUE,           /* handles are inherited */
 554                            DETACHED_PROCESS|CREATE_NEW_PROCESS_GROUP,
 555                            NULL,           /* use parent's environment */
 556                            NULL,
 557                            &siStartInfo, /* STARTUPINFO pointer */
 558                            &piProcInfo); /* receives PROCESS_INFORMATION */
 559
 560   if (! fSuccess) return GetLastError();
 561
 562 //  if (0) { // in the future we could trigger this by an argument
 563 //    SetPriorityClass(piProcInfo.hProcess, GetWin32Priority(appData.niceEngines));
 564 //  }
 565
 566   /* Close the handles we don't need in the parent */
 567   CloseHandle(piProcInfo.hThread);
 568   CloseHandle(hChildStdinRd);
 569   CloseHandle(hChildStdoutWr);
 570
 571   process = piProcInfo.hProcess;
 572   pid = piProcInfo.dwProcessId;
 573   fromE = (FILE*) _fdopen( _open_osfhandle((long)hChildStdoutRd, _O_TEXT|_O_RDONLY), "r");
 574   toE   = (FILE*) _fdopen( _open_osfhandle((long)hChildStdinWr, _O_WRONLY), "w");
 575 #else
 576     char *argv[10], *p, buf[200];
 577     int i, toEngine[2], fromEngine[2];
 578
 579     if (dir && dir[0] && chdir(dir)) { perror(dir); exit(1); }
 580     pipe(toEngine); pipe(fromEngine); // create two pipes
 581
 582     if ((pid = fork()) == 0) { // Child
 583         dup2(toEngine[0], 0);   close(toEngine[0]);   close(toEngine[1]);   // stdin from toE pipe
 584         dup2(fromEngine[1], 1); close(fromEngine[0]); close(fromEngine[1]); // stdout into fromE pipe
 585         dup2(1, fileno(stderr)); // stderr into frome pipe
 586
 587         strcpy(buf, cmdLine); p = buf;
 588         for (i=0;;) { argv[i++] = p; p = strchr(p, ' '); if (p == NULL) break; *p++ = 0; }
 589         argv[i] = NULL;
 590         execvp(argv[0], argv); // startup engine
 591
 592         perror(argv[0]); exit(1); // could not start engine; quit.
 593     }
 594     signal(SIGPIPE, SIG_IGN);
 595     close(toEngine[0]); close(fromEngine[1]); // close engine ends of pipes in adapter
 596
 597     fromE = (FILE*) fdopen(fromEngine[0], "r"); // make into high-level I/O
 598     toE   = (FILE*) fdopen(toEngine[1], "w");
 599 #endif
 600   return NO_ERROR;
 601 }
 602
 603 main(int argc, char **argv)
 604 {
 605         char *dir = NULL, *p, *q; int e;
 606
 607         if(argc == 2 && !strcmp(argv[1], "-v")) { printf("UCI2WB " VERSION " by H.G.Muller\n"); exit(0); }
 608         if(argc > 1 && !strcmp(argv[1], "debug")) { debug = 1; argc--; argv++; }
 609         if(argc > 1 && !strcmp(argv[1], "-var")) { variants = argv[2]; argc-=2; argv+=2; }
 610         if(argc > 1 && argv[1][0] == '-') { sc = argv[1][1]; argc--; argv++; }
 611         if(argc < 2) { printf("usage is: U%cI2WB [debug] [-s] <engine.exe> [<engine directory>]\n", sc-32); exit(-1); }
 612         if(argc > 2) dir = argv[2];
 613         if(argc > 3) suffix = argv[3];
 614
 615         if(sc == 'x') nameWord = valueWord = bTime = "", wTime = "opp", bInc = "increment", wInc = "oppincrement", unit = 1000; // switch to UCCI keywords
 616         else if(sc == 'f' ) frc = -1, sc = 'c';   // UCI for unannounced Chess960
 617         else if(sc == 'n') sc = 'c'; // UCI for normal Chess
 618
 619         // spawn engine proc
 620         if(StartEngine(argv[1], dir) != NO_ERROR) { perror(argv[1]), exit(-1); }
 621
 622         Sync(INIT);
 623
 624         // create separate thread to handle engine->GUI traffic
 625 #ifdef WIN32
 626         CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) Engine2GUI, (LPVOID) NULL, 0, &thread_id);
 627 #else
 628         { pthread_t t; signal(SIGINT, SIG_IGN); signal(SIGTERM, SIG_IGN); pthread_create(&t, NULL, Engine2GUI, NULL); }
 629 #endif
 630
 631         // handle GUI->engine traffic in original thread
 632         GUI2Engine();
 633 }