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 "2.2"
  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[81], *variants, varOpt;
  43 int mps, tc, inc, sTime, depth, myTime, hisTime, stm, computer = NONE, memory, oldMem=0, cores, moveNr, lastDepth, lastScore, startTime, debug, flob;
  44 int statDepth, statScore, statNodes, statTime, currNr, size, collect, nr, sm, inex, on[500], frc, byo = -1, namOpt, comp;
  45 char currMove[20], moveMap[500][10], /* for analyze mode */ canPonder[20], threadOpt[20], varList[8000];
  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         int t = (flob ? inc + myTime/40 : 1000*byo*(byo>0)); // byoyomi time
 145         if(sc == 'x') black = 1; else drawOffer = 0;// in UCCI 'black' refers to us and 'white' to opponent
 146         if(!x && drawOffer) ponder = " draw", drawOffer = 0; //pass draw offer only when not pondering
 147         fprintf(toE, "\ngo%s %stime %d %stime %d", ponder, bTime, (black ? myTime : hisTime) - t, wTime, (!black ? myTime : hisTime) - t);
 148         DPRINT(    "\n# go%s %stime %d %stime %d", ponder, bTime, (black ? myTime : hisTime) - t, wTime, (!black ? myTime : hisTime) - t);
 149         if(sTime > 0) { fprintf(toE, " movetime %d", sTime); DPRINT(" movetime %d", sTime); } else
 150         if(mps) { fprintf(toE, " movestogo %d", mps*(nr/(2*mps)+1)-nr/2); DPRINT(" movestogo %d", mps*(nr/(2*mps)+1)-nr/2); }
 151         if(flob || byo >= 0) sprintf(suffix, " byoyomi %d", t); // for engines running purely on byoyomi
 152         if(inc && !*suffix) { fprintf(toE, " %s %d %s %d", wInc, inc, bInc, inc); DPRINT(" %s %d %s %d", wInc, inc, bInc, inc); }
 153         if(depth > 0) { fprintf(toE, " depth %d", depth); DPRINT(" depth %d", depth); }
 154         if(*suffix) { fprintf(toE, suffix, inc); DPRINT(suffix, inc); }
 155         fprintf(toE, "\n"); DPRINT("\n");
 156 }
 157
 158 void
 159 StopPonder(int pondering)
 160 {
 161         if(!pondering) return;
 162         pause = 1;
 163         fprintf(toE, "stop\n"); fflush(toE); DPRINT("# stop\n"); // note: 'pondering' remains set until engine acknowledges 'stop' with 'bestmove'
 164         Sync(PAUSE); // wait for engine to acknowledge 'stop' with 'bestmove'.
 165 }
 166
 167 void
 168 LoadPos(int moveNr)
 169 {
 170         int j, lastCapt = 0; char *pos = iniPos, buf[200], stm;
 171         if(sc == 'x') { // UCCI: send only reversible moves
 172             lastCapt = Play(moveNr); // find last capture (returns -1 if none!)
 173             Play(++lastCapt);        // reconstruct board after last capture
 174             stm = (!strstr(iniPos+4, " b ") ^ lastCapt & 1 ? 'w' :  'b');
 175             sprintf(buf, "position fen %s", ToFEN(stm)); pos = buf; // send it as FEN (with "position" in UCCI!)
 176         }
 177         fprintf(toE, "%s moves", pos);
 178         DPRINT(    "# %s moves", pos);
 179         for(j=lastCapt; j<moveNr; j++) { fprintf(toE, " %s", move[j]); DPRINT(" %s", move[j]); }
 180 }
 181
 182 void
 183 StartPonder()
 184 {
 185         if(!move[moveNr][0]) return; // no ponder move
 186         LoadPos(moveNr+1);
 187         pondering = 1; lastDepth = 1;
 188         StartSearch(" ponder");
 189 }
 190
 191 char *Convert(char *pv)
 192 {   // convert Shogi coordinates to WB
 193     char *p, *q, c;
 194     static char buf[10000];
 195     if(sc != 's') return pv;
 196     p = pv; q = buf;
 197     while(c = *p++) {
 198         if(c >= '0' && c <= '9' || c >= 'a' && c <= 'z') *q++ = 'a'+'0'+size - c; else *q++ = c;
 199     }
 200     *q++ = 0;
 201     return buf;
 202 }
 203
 204 void
 205 Move4GUI(char *m)
 206 {
 207     if(sc == 's') {
 208       // convert USI move to WB format
 209       m[2] = 'a'+'0'+size - m[2];
 210       m[3] = 'a'+'0'+size - m[3];
 211       if(m[1] == '*') { // drop
 212         m[1] = '@';
 213       } else {
 214         m[0] = 'a'+'0'+size - m[0];
 215         m[1] = 'a'+'0'+size - m[1];
 216         if((stm == WHITE ? (m[1]>'0'+size-size/3 || m[3]>'0'+size-size/3)
 217                                 : (m[1] <= '0'+size/3 || m[3] <= '0'+size/3)) && m[4] != '+')
 218              m[4] = '=', m[5] = 0;
 219       }
 220     }
 221 }
 222
 223 int
 224 GetChar()
 225 {
 226     int c;
 227     if(fromF) {
 228         if((c = fgetc(fromF)) != EOF) return c;
 229         fclose(fromF); fromF = 0; printf("# end fake\n");
 230     }
 231     return fgetc(fromE);
 232 }
 233
 234 void *
 235 Engine2GUI()
 236 {
 237     char line[1024], command[256];
 238
 239     if(fromF = fopen("DefectiveEngineOptions.ini", "r")) printf("# fake engine input\n");
 240     while(1) {
 241         int i=0, x; char *p, dummy;
 242
 243         fflush(stdout); fflush(toE);
 244         while((line[i] = x = GetChar()) != EOF && line[i] != '\n') i++;
 245         line[++i] = 0;
 246         if(x == EOF) exit(0);
 247         DPRINT("# engine said: %s", line), fflush(stdout);
 248         if(sscanf(line, "%s", command) != 1) continue;
 249         if(!strcmp(command, "bestmove")) {
 250             if(pause == 1) { pondering = pause = 0; Sync(WAKEUP); continue; } // bestmove was reply to ponder miss or analysis result; ignore.
 251             else if(pondering) { pondering = 0; printf("%d 0 0 0 UCI violation! Engine moves during ponder\n", lastDepth+1); continue; } // ignore ponder search
 252             // move was a move to be played
 253             if(p = strstr(line+8, " draw")) *p = 0, printf("offer draw\n"); // UCCI
 254             if(strstr(line+9, "resign")) { printf("resign\n"); computer = NONE; }
 255             if(strstr(line+9, "win")) { printf("%s {claim}\n", stm== WHITE ? "1-0" :"0-1"); computer = NONE; } // USI
 256             if(strstr(line+9, "(none)") || strstr(line+9, "null") ||
 257                strstr(line+9, "0000")) { printf("%s\n", lastScore < -99999 ? "resign" : "1/2-1/2 {stalemate}"); computer = NONE; }
 258             sscanf(line, "bestmove %s", move[moveNr++]);
 259             myTime -= (GetTickCount() - startTime)*1.02 + inc; // update own clock, so we can give correct wtime, btime with ponder
 260             if(mps && ((moveNr+1)/2) % mps == 0) myTime += tc; if(sTime) myTime = sTime; // new session or move starts
 261             stm = WHITE+BLACK - stm;
 262             // first start a new ponder search, if pondering is on and we have a move to ponder on
 263             if(p = strstr(line+9, "ponder")) {
 264               sscanf(p+7, "%s", move[moveNr]);
 265               if(computer != NONE && ponder) {
 266                 DPRINT("# ponder on %s\n", move[moveNr]);
 267                 StartPonder();
 268               }
 269               p[-1] = '\n'; *p = 0; // strip off ponder move
 270             } else move[moveNr][0] = 0;
 271             Move4GUI(line+9);
 272             printf("move %s\n", line+9); // send move to GUI
 273             if(move[moveNr][0]) printf("Hint: %s\n", move[moveNr]);
 274             if(pause) { pause = 0; Sync(WAKEUP); } // release commands that came in during think
 275             if(lastScore == 100001 && iniPos[0] != 'f') { printf("%s {mate}\n", stm == BLACK ? "1-0" : "0-1"); computer = NONE; }
 276         }
 277         else if(!strcmp(command, "info")) {
 278             int d=0, s=0, t=(GetTickCount() - startTime)/10, n=1;
 279             char *pv, varName[80];
 280             if(sscanf(line+5, "string times @ %c", &dummy) == 1) { printf("# %s", line+12); continue; }
 281             if(sscanf(line+5, "string variant %s", varName) == 1) {
 282                 if(strcmp(varName,"chess") && (p = strstr(line+18, " startpos "))) printf("setup (-) 8x8+0_fairy %s", p+10);
 283                 continue;
 284             }
 285             if(collect && (pv = strstr(line+5, "currmove "))) {
 286                 if(p = strstr(line+5, "currmovenumber ")) {
 287                     n = atoi(p+15);
 288                     if(collect == 1 && n != 1) continue; // wait for move 1
 289                     if(collect + (n == 1) > 2) { // done collecting
 290                         if(inex && collect == 2) printf("%d 0 0 0 OK to exclude\n", lastDepth);
 291                         collect = 3; continue;
 292                     }
 293                     collect = 2; on[nr=n] = 1; sscanf(pv+9, "%s", moveMap[n]); continue; // store move
 294                 }
 295             }
 296             if(!post) continue;
 297             if(sscanf(line+5, "string %c", &dummy) == 1) printf("%d 0 0 0 %s", lastDepth, line+12); else {
 298                 if(p = strstr(line+4, " depth "))      sscanf(p+7, "%d", &d), statDepth = d;
 299                 if(p = strstr(line+4, " score cp "))   sscanf(p+10, "%d", &s), statScore = s; else
 300                 if(p = strstr(line+4, " score mate ")) sscanf(p+12, "%d", &s), s += s>0 ? 100000 : -100000, statScore = s; else
 301                 if(p = strstr(line+4, " score "))      sscanf(p+7, "%d", &s), statScore = s;
 302                 if(p = strstr(line+4, " nodes "))      sscanf(p+7, "%d", &n), statNodes = n;
 303                 if(p = strstr(line+4, " time "))       sscanf(p+6, "%d", &t), t /= 10, statTime = t;
 304                 if(p = strstr(line+4, " currmove "))   sscanf(p+10,"%s", currMove);
 305                 if(p = strstr(line+4, " currmovenumber ")) sscanf(p+16,"%d", &currNr);
 306                 if(pv = strstr(line+4, " pv ")) // convert PV info to WB thinking output
 307                     printf("%3d  %6d %6d %10d %s", lastDepth=d, lastScore=s, t, n, Convert(pv+4));
 308             }
 309         }
 310         else if(!strcmp(command, "option")) { // USI option: extract data fields
 311             char name[80], type[80], buf[1024], val[256], *q;
 312             int min=0, max=1e9;
 313             if(p = strstr(line+6, " type ")) sscanf(p+1, "type %s", type), *p = '\n';
 314             if(p = strstr(line+6, " min "))  sscanf(p+1, "min %d", &min), *p = '\n';
 315             if(p = strstr(line+6, " max "))  sscanf(p+1, "max %d", &max), *p = '\n';
 316             if(p = strstr(line+6, " default "))  sscanf(p+1, "default %[^\n]*", val), *p = '\n';
 317             if(!(p = strstr(line+6, " name "))) p = line+1; sscanf(p+6, "%[^\n]", name); // 'name' is omitted in UCCI
 318             if(!strcasecmp(name, "UCI_Chess960")) { frc=2; continue; }
 319             if(!strcasecmp(name, "UCI_Variant")) { if(p = strstr(line+6, " var ")) strcpy(varList, p); varOpt = 1; continue; }
 320             if(!strcasecmp(name, "UCI_Opponent")) { namOpt = 1; continue; }
 321             if(frc< 0 && (strstr(name, "960") || strcasestr(name, "frc")) && !strcmp(type, "check")) {
 322                 fprintf(toE, "setoption name %s value true\n", name); strcpy(val, "true"); // set non-standard suspected FRC options
 323             }
 324             if(!strcasecmp(name, "Threads")) { strcpy(threadOpt, name); continue; }
 325             if(!strcasecmp(name, "Ponder") || !strcasecmp(name, "USI_Ponder")) { strcpy(canPonder, name); continue; }
 326             if(!strcasecmp(name, "Hash") || !strcasecmp(name, "USI_Hash") || !strcasecmp(name, "hashsize")) {
 327                 memory = oldMem = atoi(val); hasHash = 1;
 328                 strcpy(hashOpt, name);
 329                 continue;
 330             }
 331             if(!strcasecmp(name, "newgame") && !strcmp(type, "button")) { newGame++; continue; }
 332             if(!strcasecmp(name, "usemillisec")) { unit = (!strcmp(val, "false") ? 2 : 1); continue; }
 333             // pass on engine-defined option as WB option feature
 334             if(!strcmp(type, "filename")) type[4] = 0;
 335             sprintf(buf, "feature option=\"%s -%s", name, type); q = buf + strlen(buf);
 336             if(     !strcmp(type, "file")
 337                  || !strcmp(type, "string")) sprintf(q, " %s\"\n", val);
 338             else if(!strcmp(type, "spin"))   sprintf(q, " %d %d %d\"\n", atoi(val), min, max);
 339             else if(!strcmp(type, "check"))  sprintf(q, " %d\"\n", strcmp(val, "true") ? 0 : 1), strcat(checkOptions, name);
 340             else if(!strcmp(type, "button")) sprintf(q, "\"\n");
 341             else if(!strcmp(type, "combo")) {
 342                 if(p = strstr(line+6, " default "))  sscanf(p+1, "default %s", type); // current setting
 343                 min = 0; p = line+6;
 344                 while(p = strstr(p, " var ")) {
 345                     sscanf(p += 5, "%s", val); // next choice
 346                     sprintf(buf + strlen(buf), "%s%s%s", min++ ? " /// " : " ", strcmp(type, val) ? "" : "*", val);
 347                 }
 348                 strcat(q, "\"\n");
 349             }
 350             else buf[0] = 0; // ignore unrecognized option types
 351             if(buf[0]) printf("%s", buf);
 352         }
 353         else if(!strcmp(command, "id")) {
 354             static char name[256], version[256];
 355             if(sscanf(line, "id name %[^\n]", name) == 1) printf("feature myname=\"%s (U%cI2WB)\"\n", name, sc-32);
 356             if(sscanf(line, "id version %[^\n]", version) == 1 && *name) printf("feature myname=\"%s %s (U%cI2WB)\"\n", name, version, sc-32);
 357         }
 358         else if(!strcmp(command, "readyok")) { pause = 0; Sync(WAKEUP); } // resume processing of GUI commands
 359         else if(sc == 'x'&& !strcmp(command, "ucciok") || sscanf(command, "u%ciok", &c)==1 && c==sc) {
 360             char *p = varList, *q = varList;
 361             while(*q && *q != '\n')  if(!strncmp(q, " var ", 5)) *p++ = ',', q +=5; // replace var keywords by commas
 362                                 else if(!strncmp(q-1, " chess ", 7)) strcpy(p, "normal"), p += 6, q += 5; // 'chess' is called 'normal' in CECP
 363                                 else if(!strncmp(q-1, " threecheck", 11)) *p++ = '3', q += 5; // 'threecheck' is written '3check' in CECP
 364                                 else *p++ = *q++; // copy other variant names unmodified
 365             if(frc) sprintf(p, ",normal,fischerandom"), printf("feature oocastle=%d\n", frc<0); // unannounced FRC uses O-O castling
 366             if(*varList) printf("feature variants=\"%s\"\n", varList+1); // from UCI_Variant combo and/or UCI_Chess960 check options
 367             printf("feature smp=1 memory=%d done=1\n", hasHash);
 368             if(unit == 2) unit = 1, fprintf(toE, "setoption usemillisec true\n");
 369             Sync(WAKEUP); // done with options
 370         }
 371     }
 372 }
 373
 374 void
 375 Move4Engine(char *m)
 376 {
 377     if(sc == 's') {
 378       // convert input move to USI format
 379       if(m[1] == '@') { // drop
 380         m[1] = '*';
 381       } else {
 382         m[0] = 'a'+'0'+size - m[0];
 383         m[1] = 'a'+'0'+size - m[1];
 384       }
 385       m[2] = 'a'+'0'+size - m[2];
 386       m[3] = 'a'+'0'+size - m[3];
 387       if(m[4] == '=') m[4] = 0; // no '=' in USI format!
 388       else if(m[4]) m[4] = '+'; // cater to WB 4.4 bug :-(
 389     }
 390 }
 391
 392 void
 393 GUI2Engine()
 394 {
 395     char line[256], command[256], *p, *q, *r, mySide;
 396
 397     while(1) {
 398         int i, x;
 399
 400         if((computer == stm || computer == ANALYZE) && !suspended) {
 401             DPRINT("# start search\n");
 402             LoadPos(moveNr); fflush(stdout); // load position
 403             // and set engine thinking (note USI swaps colors!)
 404             startTime = GetTickCount(); mySide = stm; // remember side we last played for
 405             if(computer == ANALYZE) {
 406                 fprintf(toE, "\ngo infinite"); DPRINT("\n# go infinite");
 407                 if(sm & 1) { // some moves are disabled
 408                     fprintf(toE, " searchmoves"); DPRINT(" searchmoves");
 409                     for(i=1; i<nr; i++) if(on[i]) { fprintf(toE, " %s", moveMap[i]); DPRINT(" %s", moveMap[i]); }
 410                 }
 411                 fprintf(toE, "\n"); DPRINT("\n");
 412             // code for searchmoves goes here
 413             } else { pause = 2; StartSearch(""); fflush(stdout); fflush(toE); Sync(PAUSE); } // block input during thinking
 414         }
 415       nomove:
 416         fflush(toE); fflush(stdout);
 417         i = 0; while((x = getchar()) != EOF && (line[i] = x) != '\n') i++;
 418         line[++i] = 0; if(x == EOF) { printf("# EOF\n"); fprintf(toE, "quit\n"); exit(-1); }
 419         sscanf(line, "%s", command);
 420         if(!strcmp(command, "new")) {
 421             computer = BLACK; moveNr = 0; depth = -1; move[0][0] = 0;
 422             stm = WHITE; strcpy(iniPos, "position startpos"); frc &= ~1;
 423             if(memory != oldMem && hasHash) fprintf(toE, "setoption %s%s %s%d\n", nameWord, hashOpt, valueWord, memory);
 424             oldMem = memory;
 425             // we can set other options here
 426             if(sc == 'x') { if(newGame) fprintf(toE, "setoption newgame\n"); } else // optional in UCCI
 427             if(varOpt) fprintf(toE, "setoption name UCI_Variant value chess\n");
 428             pause = 1; // wait for option settings to take effect
 429             fprintf(toE, "isready\n"); fflush(toE);
 430             Sync(PAUSE); // wait for readyok
 431             fprintf(toE, "u%cinewgame\n", sc); fflush(toE);
 432         }
 433         else if(!strcmp(command, "usermove")) {
 434             sscanf(line, "usermove %s", command); // strips off linefeed
 435             Move4Engine(command);
 436             stm = WHITE+BLACK - stm; collect = (computer == ANALYZE); sm = 0;
 437             // when pondering we either continue the ponder search as normal search, or abort it
 438             if(pondering || computer == ANALYZE) {
 439                 if(pondering && !strcmp(command, move[moveNr])) { // ponder hit
 440                     char *draw = drawOffer ? " draw" : ""; drawOffer = 0;
 441                     pondering = 0; pause = 2; moveNr++; startTime = GetTickCount(); // clock starts running now
 442                     fprintf(toE, "ponderhit%s\n", draw); DPRINT("# ponderhit%s\n", draw); fflush(toE); fflush(stdout);
 443                     Sync(PAUSE); // block input during thinking
 444                     goto nomove;
 445                 }
 446                 StopPonder(1);
 447             }
 448             strcpy(move[moveNr++], command); // possibly overwrites ponder move
 449         }
 450         else if(!strcmp(command, "level")) {
 451             int sec = 0;
 452             sscanf(line, "level %d %d:%d %d", &mps, &tc, &sec, &inc) == 4 ||
 453             sscanf(line, "level %d %d %d", &mps, &tc, &inc);
 454             tc = (60*tc + sec)*1000; inc *= 1000; sTime = 0; tc /= unit; inc /= unit;
 455         }
 456         else if(!strcmp(command, "option")) {
 457             char name[80], *p;
 458             if(sscanf(line+7, "UCI2WB debug output=%d", &debug) == 1) ; else
 459             if(sscanf(line+7, "Floating Byoyomi=%d", &flob) == 1) ; else
 460             if(sscanf(line+7, "Byoyomi=%d", &byo) == 1) ; else
 461             if(p = strchr(line, '=')) {
 462                 *p++ = 0;
 463                 if(strstr(checkOptions, line+7)) sprintf(p, "%s\n", atoi(p) ? "true" : "false");
 464                 fprintf(toE, "setoption name %s value %s", line+7, p); DPRINT("# setoption %s%s %s%s", nameWord, line+7, valueWord, p);
 465             } else { fprintf(toE, "setoption %s%s\n", nameWord, line+7); DPRINT("# setoption %s%s\n", nameWord, line+7); }
 466         }
 467         else if(!strcmp(command, "protover")) {
 468             if(!variants) variants = sc=='s' ? "shogi,5x5+5_shogi" : VARIANTS;
 469             printf("feature variants=\"%s\" setboard=1 usermove=1 debug=1 ping=1 name=1 reuse=0 exclude=1 pause=1 sigint=0 sigterm=0 done=0\n", variants);
 470             printf("feature option=\"UCI2WB debug output -check %d\"\n", debug);
 471             if(sc == 's') printf("feature option=\"Floating Byoyomi -check %d\"\nfeature option=\"Byoyomi -spin %d -1 1000\"\n", flob, byo);
 472             fprintf(toE, sc == 'x' ? "ucci\n" : "u%ci\n", sc); fflush(toE); // prompt UCI engine for options
 473             Sync(PAUSE); // wait for uciok
 474         }
 475         else if(!strcmp(command, "setboard")) {
 476                 stm = (strstr(line+9, " b ") ? BLACK : WHITE);
 477                 if((p = strchr(line+9, '[')) && !varOpt) { char c;
 478                     *p++ = 0; q = strchr(p, ']'); *q = 0; r = q + 4;
 479                     if(sc == 's') q[2] = 'w' + 'b' - q[2], strcpy(r=q+3, " 1\n"); // Shogi: reverse color
 480                     else r = strchr(strchr(q+4, ' ') + 1, ' '); // skip to second space (after e.p. square)
 481                     *r = 0; sprintf(command, "%s%s %s %s", line+9, q+1, p, r+1);
 482                 } else strcpy(command, line+9);
 483                 if(frc == -1 && (p = strchr(command, ' '))) strncpy(p+3, "KQkq", 4); // unannounced FRC
 484                 sprintf(iniPos, "%s%sfen %s", iniPos[0]=='p' ? "position " : "", sc=='s' ? "s" : "", command);
 485                 iniPos[strlen(iniPos)-1] = sm = 0; collect = (computer == ANALYZE);
 486         }
 487         else if(!strcmp(command, "variant")) {
 488                 if(varOpt) {
 489                     fprintf(toE, "setoption name UCI_Variant value %sucinewgame\nisready\n", strcmp(line+8, "3check\n") ? line+8 : "threecheck\n");
 490                     fflush(toE); Sync(PAUSE);
 491                 }
 492                 if(!strcmp(line+8, "shogi\n")) size = 9, strcpy(iniPos, "position startpos");
 493                 if(!strcmp(line+8, "5x5+5_shogi\n")) size = 5, strcpy(iniPos, "position startpos");
 494                 if(!strcmp(line+8, "xiangqi\n")) strcpy(iniPos, "fen rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR r");
 495                 if(!strcmp(line+8, "fischerandom\n")) { frc |= 1; if(frc > 0) fprintf(toE, "setoption name UCI_Chess960 value true\n"); }
 496         }
 497         else if(!strcmp(command, "undo") && (i=1) || !strcmp(command, "remove") && (i=2)) {
 498             if(pondering || computer == ANALYZE) StopPonder(1);
 499             moveNr = moveNr > i ? moveNr - i : 0; collect = (computer == ANALYZE); sm = 0;
 500         }
 501         else if(!strcmp(command, ".")) {
 502             printf("stat01: %d %d %d %d 100 %s\n", statTime, statNodes, statDepth, 100-currNr, currMove);
 503             goto nomove;
 504         }
 505         else if(!strcmp(command+2, "clude") && collect > 2) { // include or exclude
 506             int all = !strcmp(line+8, "all"), in = command[1] == 'n';
 507             inex = 1; line[strlen(line)-1] = sm = 0; // strip LF and clear sm flag
 508             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
 509             if(!(sm & 2)) goto nomove; // no moves enabled; continue current search
 510             if(computer == ANALYZE) StopPonder(1); // abort old analysis
 511         }
 512         else if(!strcmp(command, "pause")) {
 513             if(computer == stm) myTime -= GetTickCount() - startTime;
 514             suspended = 1 + pondering; // remember if we were pondering, and stop search ignoring bestmove
 515             StopPonder(pondering || computer == stm);
 516         }
 517         else if(!strcmp(command, "resume")) {
 518             if(suspended == 2) StartPonder(); // restart interrupted ponder search
 519             suspended = 0; // causes thinking to start in normal way if on move or analyzing
 520         }
 521         else if(!strcmp(command, "xboard")) ;
 522         else if(!strcmp(command, "analyze"))computer = ANALYZE, collect = 1, sm = 0;
 523         else if(!strcmp(command, "exit"))   computer = NONE, StopPonder(1);
 524         else if(!strcmp(command, "force"))  computer = NONE, StopPonder(pondering);
 525         else if(!strcmp(command, "go"))     computer = stm;
 526         else if(!strcmp(command, "time"))   sscanf(line+4, "%d", &myTime),  myTime  = (10*myTime)/unit;
 527         else if(!strcmp(command, "otim"))   sscanf(line+4, "%d", &hisTime), hisTime = (10*hisTime)/unit;
 528         else if(!strcmp(command, "post"))   post = 1;
 529         else if(!strcmp(command, "nopost")) post = 0;
 530         else if(!strcmp(command, "easy") && !!*canPonder) ponder = 0, StopPonder(pondering), fprintf(toE, "setoption %s%s %sfalse\n", nameWord, canPonder, valueWord);
 531         else if(!strcmp(command, "hard") && !!*canPonder) ponder = 1, fprintf(toE, "setoption %s%s %strue\n", nameWord, canPonder, valueWord), StartPonder();
 532         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); }
 533         else if(!strcmp(command, "memory")) sscanf(line, "memory %d", &memory);
 534         else if(!strcmp(command, "cores")&& !!*threadOpt) sscanf(line, "cores %d", &cores), fprintf(toE, "setoption %s%s %s%d\n", nameWord, threadOpt, valueWord, cores);
 535         else if(!strcmp(command, "sd"))     sscanf(line, "sd %d", &depth);
 536         else if(!strcmp(command, "st"))     sscanf(line, "st %d", &sTime), sTime = 1000*sTime - 30, inc = 0, sTime /= unit;
 537         else if(!strcmp(command, "name"))   { if(namOpt) fprintf(toE, "setoption name UCI_Opponent value none none %s %s", comp ? "computer" : "human", line+5); }
 538         else if(!strcmp(command, "computer")) comp = 1;
 539         else if(!strcmp(command, "offer"))  drawOffer = 1;
 540         else if(!strcmp(command, "result")) { if(sc == 's') fprintf(toE, "gameover %s\n", line[8] == '/' ? "draw" : (line[7] == '0') == mySide ? "win" : "lose"); }
 541         else if(!strcmp(command, "quit"))   fprintf(toE, "quit\n"), fflush(toE), exit(0);
 542     }
 543 }
 544
 545 int
 546 StartEngine(char *cmdLine, char *dir)
 547 {
 548 #ifdef WIN32
 549   HANDLE hChildStdinRd, hChildStdinWr,
 550     hChildStdoutRd, hChildStdoutWr;
 551   BOOL fSuccess;
 552   PROCESS_INFORMATION piProcInfo;
 553   STARTUPINFO siStartInfo;
 554   DWORD err;
 555
 556   /* Create a pipe for the child's STDOUT. */
 557   if (! WinPipe(&hChildStdoutRd, &hChildStdoutWr)) return GetLastError();
 558
 559   /* Create a pipe for the child's STDIN. */
 560   if (! WinPipe(&hChildStdinRd, &hChildStdinWr)) return GetLastError();
 561
 562   SetCurrentDirectory(dir); // go to engine directory
 563
 564   /* Now create the child process. */
 565   siStartInfo.cb = sizeof(STARTUPINFO);
 566   siStartInfo.lpReserved = NULL;
 567   siStartInfo.lpDesktop = NULL;
 568   siStartInfo.lpTitle = NULL;
 569   siStartInfo.dwFlags = STARTF_USESTDHANDLES;
 570   siStartInfo.cbReserved2 = 0;
 571   siStartInfo.lpReserved2 = NULL;
 572   siStartInfo.hStdInput = hChildStdinRd;
 573   siStartInfo.hStdOutput = hChildStdoutWr;
 574   siStartInfo.hStdError = hChildStdoutWr;
 575
 576   fSuccess = CreateProcess(NULL,
 577                            cmdLine,        /* command line */
 578                            NULL,           /* process security attributes */
 579                            NULL,           /* primary thread security attrs */
 580                            TRUE,           /* handles are inherited */
 581                            DETACHED_PROCESS|CREATE_NEW_PROCESS_GROUP,
 582                            NULL,           /* use parent's environment */
 583                            NULL,
 584                            &siStartInfo, /* STARTUPINFO pointer */
 585                            &piProcInfo); /* receives PROCESS_INFORMATION */
 586
 587   if (! fSuccess) return GetLastError();
 588
 589 //  if (0) { // in the future we could trigger this by an argument
 590 //    SetPriorityClass(piProcInfo.hProcess, GetWin32Priority(appData.niceEngines));
 591 //  }
 592
 593   /* Close the handles we don't need in the parent */
 594   CloseHandle(piProcInfo.hThread);
 595   CloseHandle(hChildStdinRd);
 596   CloseHandle(hChildStdoutWr);
 597
 598   process = piProcInfo.hProcess;
 599   pid = piProcInfo.dwProcessId;
 600   fromE = (FILE*) _fdopen( _open_osfhandle((long)hChildStdoutRd, _O_TEXT|_O_RDONLY), "r");
 601   toE   = (FILE*) _fdopen( _open_osfhandle((long)hChildStdinWr, _O_WRONLY), "w");
 602 #else
 603     char *argv[10], *p, buf[200];
 604     int i, toEngine[2], fromEngine[2];
 605
 606     if (dir && dir[0] && chdir(dir)) { perror(dir); exit(1); }
 607     pipe(toEngine); pipe(fromEngine); // create two pipes
 608
 609     if ((pid = fork()) == 0) { // Child
 610         dup2(toEngine[0], 0);   close(toEngine[0]);   close(toEngine[1]);   // stdin from toE pipe
 611         dup2(fromEngine[1], 1); close(fromEngine[0]); close(fromEngine[1]); // stdout into fromE pipe
 612         dup2(1, fileno(stderr)); // stderr into frome pipe
 613
 614         strcpy(buf, cmdLine); p = buf;
 615         for (i=0;;) { argv[i++] = p; p = strchr(p, ' '); if (p == NULL) break; *p++ = 0; }
 616         argv[i] = NULL;
 617         execvp(argv[0], argv); // startup engine
 618
 619         perror(argv[0]); exit(1); // could not start engine; quit.
 620     }
 621     signal(SIGPIPE, SIG_IGN);
 622     close(toEngine[0]); close(fromEngine[1]); // close engine ends of pipes in adapter
 623
 624     fromE = (FILE*) fdopen(fromEngine[0], "r"); // make into high-level I/O
 625     toE   = (FILE*) fdopen(toEngine[1], "w");
 626 #endif
 627   return NO_ERROR;
 628 }
 629
 630 main(int argc, char **argv)
 631 {
 632         char *dir = NULL, *p, *q; int e;
 633
 634         if(argc == 2 && !strcmp(argv[1], "-v")) { printf("UCI2WB " VERSION " by H.G.Muller\n"); exit(0); }
 635         if(argc > 1 && !strcmp(argv[1], "debug")) { debug = 1; argc--; argv++; }
 636         if(argc > 1 && !strcmp(argv[1], "-var")) { variants = argv[2]; argc-=2; argv+=2; }
 637         if(argc > 1 && argv[1][0] == '-') { sc = argv[1][1]; argc--; argv++; }
 638         if(argc < 2) { printf("usage is: U%cI2WB [debug] [-s] <engine.exe> [<engine directory>]\n", sc-32); exit(-1); }
 639         if(argc > 2) dir = argv[2];
 640         if(argc > 3) strncpy(suffix, argv[3], 80);
 641
 642         if(sc == 'x') nameWord = valueWord = bTime = "", wTime = "opp", bInc = "increment", wInc = "oppincrement", unit = 1000; // switch to UCCI keywords
 643         else if(sc == 'f' ) frc = -1, sc = 'c';   // UCI for unannounced Chess960
 644         else if(sc == 'n') sc = 'c'; // UCI for normal Chess
 645
 646         // spawn engine proc
 647         if(StartEngine(argv[1], dir) != NO_ERROR) { perror(argv[1]), exit(-1); }
 648
 649         Sync(INIT);
 650
 651         // create separate thread to handle engine->GUI traffic
 652 #ifdef WIN32
 653         CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) Engine2GUI, (LPVOID) NULL, 0, &thread_id);
 654 #else
 655         { pthread_t t; signal(SIGINT, SIG_IGN); signal(SIGTERM, SIG_IGN); pthread_create(&t, NULL, Engine2GUI, NULL); }
 656 #endif
 657
 658         // handle GUI->engine traffic in original thread
 659         GUI2Engine();
 660 }