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 "2.3"
  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 #define STDVARS "chess,chess960,crazyhouse,threecheck,giveaway,atomic,seirawan,shogi,xiangqi"
  35
  36 #define DPRINT if(debug) printf
  37 #define EPRINT(X) { char f[999]; sprintf X; DPRINT("%s", f); fprintf(toE, "%s", f + 2*(*f == '#')); /* strip optional # prefix */ }
  38
  39 #define WHITE 0
  40 #define BLACK 1
  41 #define NONE  2
  42 #define ANALYZE 3
  43
  44 char move[2000][10], checkOptions[8192], iniPos[256], hashOpt[20], pause, pondering, suspended, ponder, post, hasHash, c, sc='c', suffix[81], *variants, varOpt;
  45 int mps, tc, inc, sTime, depth, myTime, hisTime, stm, computer = NONE, memory, oldMem=0, cores, moveNr, lastDepth, lastScore, startTime, debug, flob;
  46 int statDepth, statScore, statNodes, statTime, currNr, size, collect, nr, sm, inex, on[500], frc, byo = -1, namOpt, comp;
  47 char currMove[20], moveMap[500][10], /* for analyze mode */ canPonder[20], threadOpt[20], varList[8000], anaOpt[20];
  48 char board[100];  // XQ board for UCCI
  49 char *nameWord = "name ", *valueWord = "value ", *wTime = "w", *bTime = "b", *wInc = "winc", *bInc = "binc", newGame; // keywords that differ in UCCI
  50 int unit = 1, drawOffer;
  51
  52 FILE *toE, *fromE, *fromF;
  53 int pid;
  54
  55 #ifdef WIN32
  56 char *strcasestr (char *p, char *q) { char *r = p; while(*r) *r = tolower(*r), r++; return strstr(p, q); }
  57
  58 WinPipe(HANDLE *hRd, HANDLE *hWr)
  59 {
  60   SECURITY_ATTRIBUTES saAttr;
  61
  62   /* Set the bInheritHandle flag so pipe handles are inherited. */
  63   saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
  64   saAttr.bInheritHandle = TRUE;
  65   saAttr.lpSecurityDescriptor = NULL;
  66
  67   /* Create a pipe */
  68   return CreatePipe(hRd, hWr, &saAttr, 0);
  69 }
  70 #endif
  71
  72 #define INIT 0
  73 #define WAKEUP 1
  74 #define PAUSE 2
  75
  76 void
  77 Sync (int action)
  78 {
  79 #ifdef WIN32
  80         static HANDLE hWr, hRd; DWORD d; char c;
  81         switch(action) {
  82             case INIT:   WinPipe(&hRd, &hWr); break;
  83             case WAKEUP: WriteFile(hWr, "\n", 1, &d, NULL); break;
  84             case PAUSE:  ReadFile(hRd, &c, 1, &d, NULL);
  85         }
  86 #else
  87         static int syncPipe[2]; char c;
  88         switch(action) {
  89             case INIT:   pipe(syncPipe); break;
  90             case WAKEUP: write(syncPipe[1], "\n", 1); break;
  91             case PAUSE:  read(syncPipe[0], &c, 1);
  92         }
  93 #endif
  94 }
  95
  96 void
  97 FromFEN(char *fen)
  98 {       int i=0;
  99         while(*fen) {
 100             char c = *fen++;
 101             if(c >= 'A') board[i++] = c; else
 102             if(c == '/') i++; else
 103             if(c == ' ') break; else
 104             while(c-- > '0' && i < 99) board[i++] = 0;
 105             if(i >= 99) break;
 106         }
 107 }
 108
 109 char *
 110 ToFEN(int stm)
 111 {
 112         int i, n=0; static char fen[200]; char *p = fen;
 113         for(i=0; i<99; i++) {
 114             char c = board[i];
 115             if(c >= 'A')  { if(n) *p++ = '0' + n; n = 0;  *p++ = c; } else n ++;
 116             if(i%10 == 8) { if(n) *p++ = '0' + n; n = -1; *p++ = '/'; }
 117         }
 118         sprintf(p-1, " %c - - 0 1", stm);
 119         return fen;
 120 }
 121
 122 int
 123 Sqr(char *m, int j)
 124 {
 125         int n = m[j] - 'a' + 10*('9' - m[j+1]);
 126         if(n < 0) n = 0; else if(n > 99) n = 99; return n;
 127 }
 128
 129 int
 130 Play(int nr)
 131 {
 132         int i, last = -1;
 133         FromFEN(iniPos + 4); // in XQ iniPos always has just "fen " prefix
 134         for(i=0; i<nr; i++) {
 135             int from=Sqr(move[i], 0), to=Sqr(move[i], 2);
 136             if(board[to] || (board[from]|32)  == 'p' && move[i][1] != move[i][3]) last = i;
 137             board[to] = board[from]; board[from] = 0;
 138         }
 139         return last;
 140 }
 141
 142 void
 143 StartSearch(char *ponder)
 144 {       // send the 'go' command to engine. Suffix by ponder.
 145         int x = (ponder[0] != 0);                   // during ponder stm is the opponent
 146         int black = (stm == BLACK ^ x ^ sc == 's'); // set if our color is what the engine calls black
 147         int nr = moveNr + x;                        // we ponder for one move ahead!
 148         int t = (flob ? inc + myTime/40 : 1000*byo*(byo>0)); // byoyomi time
 149         if(sc == 'x') black = 1; else drawOffer = 0;// in UCCI 'black' refers to us and 'white' to opponent
 150         if(!x && drawOffer) ponder = " draw", drawOffer = 0; //pass draw offer only when not pondering
 151         EPRINT((f, "# go%s %stime %d %stime %d", ponder, bTime, (black ? myTime : hisTime) - t, wTime, (!black ? myTime : hisTime) - t))
 152         if(sTime > 0) EPRINT((f, " movetime %d", sTime)) else
 153         if(mps) EPRINT((f, " movestogo %d", mps*(nr/(2*mps)+1)-nr/2))
 154         if(flob || byo >= 0) sprintf(suffix, " byoyomi %d", t); // for engines running purely on byoyomi
 155         if(inc && !*suffix) EPRINT((f, " %s %d %s %d", wInc, inc, bInc, inc))
 156         if(depth > 0) EPRINT((f, " depth %d", depth))
 157         if(*suffix) EPRINT((f, suffix, inc))
 158         EPRINT((f, "\n"))
 159 }
 160
 161 void
 162 StopPonder(int pondering)
 163 {
 164         if(!pondering) return;
 165         pause = 1;
 166         EPRINT((f, "# stop\n")) fflush(toE); // note: 'pondering' remains set until engine acknowledges 'stop' with 'bestmove'
 167         Sync(PAUSE); // wait for engine to acknowledge 'stop' with 'bestmove'.
 168 }
 169
 170 void
 171 LoadPos(int moveNr)
 172 {
 173         int j, lastCapt = 0; char *pos = iniPos, buf[200], stm;
 174         if(sc == 'x') { // UCCI: send only reversible moves
 175             lastCapt = Play(moveNr); // find last capture (returns -1 if none!)
 176             Play(++lastCapt);        // reconstruct board after last capture
 177             stm = (!strstr(iniPos+4, " b ") ^ lastCapt & 1 ? 'w' :  'b');
 178             sprintf(buf, "position fen %s", ToFEN(stm)); pos = buf; // send it as FEN (with "position" in UCCI!)
 179         }
 180         EPRINT((f, "# %s moves", pos))
 181         for(j=lastCapt; j<moveNr; j++) EPRINT((f, " %s", move[j]))
 182         EPRINT((f, "\n"))
 183 }
 184
 185 void
 186 StartPonder()
 187 {
 188         if(!move[moveNr][0]) return; // no ponder move
 189         LoadPos(moveNr+1);
 190         pondering = 1; lastDepth = 1;
 191         StartSearch(" ponder");
 192 }
 193
 194 void
 195 Analyze(char *val)
 196 {
 197     if(*anaOpt) EPRINT((f, "# setoption %s%s %s%s\n", nameWord, anaOpt, valueWord, val));
 198 }
 199
 200 char *Convert(char *pv)
 201 {   // convert Shogi coordinates to WB
 202     char *p, *q, c;
 203     static char buf[10000];
 204     if(sc != 's') return pv;
 205     p = pv; q = buf;
 206     while(c = *p++) {
 207         if(c >= '0' && c <= '9' || c >= 'a' && c <= 'z') *q++ = 'a'+'0'+size - c; else *q++ = c;
 208     }
 209     *q++ = 0;
 210     return buf;
 211 }
 212
 213 void
 214 Move4GUI(char *m)
 215 {
 216     if(sc == 's') {
 217       // convert USI move to WB format
 218       m[2] = 'a'+'0'+size - m[2];
 219       m[3] = 'a'+'0'+size - m[3];
 220       if(m[1] == '*') { // drop
 221         m[1] = '@';
 222       } else {
 223         m[0] = 'a'+'0'+size - m[0];
 224         m[1] = 'a'+'0'+size - m[1];
 225         if((stm == WHITE ? (m[1]>'0'+size-size/3 || m[3]>'0'+size-size/3)
 226                                 : (m[1] <= '0'+size/3 || m[3] <= '0'+size/3)) && m[4] != '+')
 227              m[4] = '=', m[5] = 0;
 228       }
 229     }
 230 }
 231
 232 int
 233 GetChar()
 234 {
 235     int c;
 236     if(fromF) {
 237         if((c = fgetc(fromF)) != EOF) return c;
 238         fclose(fromF); fromF = 0; printf("# end fake\n");
 239     }
 240     return fgetc(fromE);
 241 }
 242
 243 void *
 244 Engine2GUI()
 245 {
 246     char line[1024], command[256];
 247
 248     if(fromF = fopen("DefectiveEngineOptions.ini", "r")) printf("# fake engine input\n");
 249     while(1) {
 250         int i=0, x; char *p, dummy;
 251
 252         fflush(stdout); fflush(toE);
 253         while((line[i] = x = GetChar()) != EOF && line[i] != '\n') i++;
 254         line[++i] = 0;
 255         if(x == EOF) exit(0);
 256         DPRINT("# engine said: %s", line), fflush(stdout);
 257         if(sscanf(line, "%s", command) != 1) continue;
 258         if(!strcmp(command, "bestmove")) {
 259             if(pause == 1) { pondering = pause = 0; Sync(WAKEUP); continue; } // bestmove was reply to ponder miss or analysis result; ignore.
 260             else if(pondering) { pondering = 0; printf("%d 0 0 0 UCI violation! Engine moves during ponder\n", lastDepth+1); continue; } // ignore ponder search
 261             // move was a move to be played
 262             if(p = strstr(line+8, " draw")) *p = 0, printf("offer draw\n"); // UCCI
 263             if(strstr(line+9, "resign")) { printf("resign\n"); computer = NONE; }
 264             if(strstr(line+9, "win")) { printf("%s {claim}\n", stm== WHITE ? "1-0" :"0-1"); computer = NONE; } // USI
 265             if(strstr(line+9, "(none)") || strstr(line+9, "null") ||
 266                strstr(line+9, "0000")) { printf("%s\n", lastScore < -99999 ? "resign" : "1/2-1/2 {stalemate}"); computer = NONE; }
 267             sscanf(line, "bestmove %s", move[moveNr++]);
 268             myTime -= (GetTickCount() - startTime)*1.02 + inc; // update own clock, so we can give correct wtime, btime with ponder
 269             if(mps && ((moveNr+1)/2) % mps == 0) myTime += tc; if(sTime) myTime = sTime; // new session or move starts
 270             stm = WHITE+BLACK - stm;
 271             // first start a new ponder search, if pondering is on and we have a move to ponder on
 272             if(p = strstr(line+9, "ponder")) {
 273               sscanf(p+7, "%s", move[moveNr]);
 274               if(computer != NONE && ponder) {
 275                 DPRINT("# ponder on %s\n", move[moveNr]);
 276                 StartPonder();
 277               }
 278               p[-1] = '\n'; *p = 0; // strip off ponder move
 279             } else move[moveNr][0] = 0;
 280             Move4GUI(line+9);
 281             printf("move %s\n", line+9); // send move to GUI
 282             if(move[moveNr][0]) printf("Hint: %s\n", move[moveNr]);
 283             if(pause) { pause = 0; Sync(WAKEUP); } // release commands that came in during think
 284             if(lastScore == 100001 && iniPos[0] != 'f') { printf("%s {mate}\n", stm == BLACK ? "1-0" : "0-1"); computer = NONE; }
 285         }
 286         else if(!strcmp(command, "info")) {
 287             int d=0, s=0, t=(GetTickCount() - startTime)/10, n=1;
 288             char *pv, varName[80];
 289             if(sscanf(line+5, "string times @ %c", &dummy) == 1) { printf("# %s", line+12); continue; }
 290             if(sscanf(line+5, "string variant %s", varName) == 1) {
 291                 if(!strstr(STDVARS, varName) && (p = strstr(line+18, " startpos "))) printf("setup (-) 8x8+0_fairy %s", p+10);
 292                 continue;
 293             }
 294             if(collect && (pv = strstr(line+5, "currmove "))) {
 295                 if(p = strstr(line+5, "currmovenumber ")) {
 296                     n = atoi(p+15);
 297                     if(collect == 1 && n != 1) continue; // wait for move 1
 298                     if(collect + (n == 1) > 2) { // done collecting
 299                         if(inex && collect == 2) printf("%d 0 0 0 OK to exclude\n", lastDepth);
 300                         collect = 3; continue;
 301                     }
 302                     collect = 2; on[nr=n] = 1; sscanf(pv+9, "%s", moveMap[n]); continue; // store move
 303                 }
 304             }
 305             if(!post) continue;
 306             if(sscanf(line+5, "string %c", &dummy) == 1) printf("%d 0 0 0 %s", lastDepth, line+12); else {
 307                 if(p = strstr(line+4, " depth "))      sscanf(p+7, "%d", &d), statDepth = d;
 308                 if(p = strstr(line+4, " score cp "))   sscanf(p+10, "%d", &s), statScore = s; else
 309                 if(p = strstr(line+4, " score mate ")) sscanf(p+12, "%d", &s), s += s>0 ? 100000 : -100000, statScore = s; else
 310                 if(p = strstr(line+4, " score "))      sscanf(p+7, "%d", &s), statScore = s;
 311                 if(p = strstr(line+4, " nodes "))      sscanf(p+7, "%d", &n), statNodes = n;
 312                 if(p = strstr(line+4, " time "))       sscanf(p+6, "%d", &t), t /= 10, statTime = t;
 313                 if(p = strstr(line+4, " currmove "))   sscanf(p+10,"%s", currMove);
 314                 if(p = strstr(line+4, " currmovenumber ")) sscanf(p+16,"%d", &currNr);
 315                 if(pv = strstr(line+4, " pv ")) // convert PV info to WB thinking output
 316                     printf("%3d  %6d %6d %10d %s", lastDepth=d, lastScore=s, t, n, Convert(pv+4));
 317             }
 318         }
 319         else if(!strcmp(command, "option")) { // USI option: extract data fields
 320             char name[80], type[80], buf[1024], val[256], *q;
 321             int min=0, max=1e9;
 322             if(p = strstr(line+6, " type ")) sscanf(p+1, "type %s", type), *p = '\n';
 323             if(p = strstr(line+6, " min "))  sscanf(p+1, "min %d", &min), *p = '\n';
 324             if(p = strstr(line+6, " max "))  sscanf(p+1, "max %d", &max), *p = '\n';
 325             if(p = strstr(line+6, " default "))  sscanf(p+1, "default %[^\n]*", val), *p = '\n';
 326             if(!(p = strstr(line+6, " name "))) p = line+1; sscanf(p+6, "%[^\n]", name); // 'name' is omitted in UCCI
 327             if(!strcasecmp(name, "UCI_Chess960")) { frc=2; continue; }
 328             if(!strcasecmp(name, "UCI_Variant")) { if(p = strstr(line+6, " var ")) strcpy(varList, p); varOpt = 1; continue; }
 329             if(!strcasecmp(name, "UCI_Opponent")) { namOpt = 1; continue; }
 330             if(!strcasecmp(name+2, "I_AnalyseMode")) { strcpy(anaOpt, name); continue; }
 331             if(frc< 0 && (strstr(name, "960") || strcasestr(name, "frc")) && !strcmp(type, "check")) {
 332                 EPRINT((f, "# setoption name %s value true\n", name)) strcpy(val, "true"); // set non-standard suspected FRC options
 333             }
 334             if(!strcasecmp(name, "Threads")) { strcpy(threadOpt, name); continue; }
 335             if(!strcasecmp(name, "Ponder") || !strcasecmp(name, "USI_Ponder")) { strcpy(canPonder, name); continue; }
 336             if(!strcasecmp(name, "Hash") || !strcasecmp(name, "USI_Hash") || !strcasecmp(name, "hashsize")) {
 337                 memory = oldMem = atoi(val); hasHash = 1;
 338                 strcpy(hashOpt, name);
 339                 continue;
 340             }
 341             if(!strcasecmp(name, "newgame") && !strcmp(type, "button")) { newGame++; continue; }
 342             if(!strcasecmp(name, "usemillisec")) { unit = (!strcmp(val, "false") ? 2 : 1); continue; }
 343             // pass on engine-defined option as WB option feature
 344             if(!strcmp(type, "filename")) type[4] = 0;
 345             sprintf(buf, "feature option=\"%s -%s", name, type); q = buf + strlen(buf);
 346             if(     !strcmp(type, "file")
 347                  || !strcmp(type, "string")) sprintf(q, " %s\"\n", val);
 348             else if(!strcmp(type, "spin"))   sprintf(q, " %d %d %d\"\n", atoi(val), min, max);
 349             else if(!strcmp(type, "check"))  sprintf(q, " %d\"\n", strcmp(val, "true") ? 0 : 1), strcat(checkOptions, name);
 350             else if(!strcmp(type, "button")) sprintf(q, "\"\n");
 351             else if(!strcmp(type, "combo")) {
 352                 if(p = strstr(line+6, " default "))  sscanf(p+1, "default %s", type); // current setting
 353                 min = 0; p = line+6;
 354                 while(p = strstr(p, " var ")) {
 355                     sscanf(p += 5, "%s", val); // next choice
 356                     sprintf(buf + strlen(buf), "%s%s%s", min++ ? " /// " : " ", strcmp(type, val) ? "" : "*", val);
 357                 }
 358                 strcat(q, "\"\n");
 359             }
 360             else buf[0] = 0; // ignore unrecognized option types
 361             if(buf[0]) printf("%s", buf);
 362         }
 363         else if(!strcmp(command, "id")) {
 364             static char name[256], version[256];
 365             if(sscanf(line, "id name %[^\n]", name) == 1) printf("feature myname=\"%s (U%cI2WB)\"\n", name, sc-32);
 366             if(sscanf(line, "id version %[^\n]", version) == 1 && *name) printf("feature myname=\"%s %s (U%cI2WB)\"\n", name, version, sc-32);
 367         }
 368         else if(!strcmp(command, "readyok")) { pause = 0; Sync(WAKEUP); } // resume processing of GUI commands
 369         else if(sc == 'x'&& !strcmp(command, "ucciok") || sscanf(command, "u%ciok", &c)==1 && c==sc) {
 370             char *p = varList, *q = varList;
 371             while(*q && *q != '\n')  if(!strncmp(q, " var ", 5)) *p++ = ',', q +=5; // replace var keywords by commas
 372                                 else if(!strncmp(q-1, " chess ", 7)) strcpy(p, "normal"), p += 6, q += 5; // 'chess' is called 'normal' in CECP
 373                                 else if(!strncmp(q-1, " threecheck", 11)) *p++ = '3', q += 5; // 'threecheck' is written '3check' in CECP
 374                                 else *p++ = *q++; // copy other variant names unmodified
 375             if(frc) sprintf(p, ",normal,fischerandom"), printf("feature oocastle=%d\n", frc<0); // unannounced FRC uses O-O castling
 376             if(*varList) printf("feature variants=\"%s\"\n", varList+1); // from UCI_Variant combo and/or UCI_Chess960 check options
 377             printf("feature smp=1 memory=%d done=1\n", hasHash);
 378             if(unit == 2) { unit = 1; EPRINT((f, "# setoption usemillisec true\n")) }
 379             Sync(WAKEUP); // done with options
 380         }
 381     }
 382 }
 383
 384 void
 385 Move4Engine(char *m)
 386 {
 387     if(sc == 's') {
 388       // convert input move to USI format
 389       if(m[1] == '@') { // drop
 390         m[1] = '*';
 391       } else {
 392         m[0] = 'a'+'0'+size - m[0];
 393         m[1] = 'a'+'0'+size - m[1];
 394       }
 395       m[2] = 'a'+'0'+size - m[2];
 396       m[3] = 'a'+'0'+size - m[3];
 397       if(m[4] == '=') m[4] = 0; // no '=' in USI format!
 398       else if(m[4]) m[4] = '+'; // cater to WB 4.4 bug :-(
 399     }
 400 }
 401
 402 void
 403 GUI2Engine()
 404 {
 405     char line[256], command[256], *p, *q, *r, mySide, searching = 0;
 406
 407     while(1) {
 408         int i, x, difficult, think=0;
 409
 410         if((computer == stm || computer == ANALYZE && !searching) && !suspended) {
 411             DPRINT("# start search\n");
 412             LoadPos(moveNr); fflush(stdout); // load position
 413             // and set engine thinking (note USI swaps colors!)
 414             startTime = GetTickCount(); mySide = stm; // remember side we last played for
 415             if(computer == ANALYZE) {
 416                 EPRINT((f, "# go infinite"))
 417                 if(sm & 1) { // some moves are disabled
 418                     EPRINT((f, " searchmoves"))
 419                     for(i=1; i<nr; i++) if(on[i]) EPRINT((f, " %s", moveMap[i]))
 420                 }
 421                 EPRINT((f, "\n")) searching = 1; // suppresses spurious commands during analysis starting new searches
 422             } else pause = think = 2, StartSearch(""); // request suspending of input processing while thinking
 423         }
 424       nomove:
 425        for(difficult=0; !difficult; ) { // read and handle commands that can (or must) be handled during thinking
 426         fflush(toE); fflush(stdout);
 427         i = 0; while((x = getchar()) != EOF && (line[i] = x) != '\n') i++;
 428         line[++i] = 0; if(x == EOF) { printf("# EOF\n"); sprintf(line, "quit -1\n"); }
 429         sscanf(line, "%s", command);
 430         if(!strcmp(command, "offer")) drawOffer = 1; // backlogged anyway, so this can be done instantly
 431         else if(!strcmp(command, "post"))  post = 1;
 432         else if(!strcmp(command, "nopost"))post = 0;
 433         else if(!strcmp(command, "option")) {
 434             char name[80], *p;
 435             if(searching) StopPonder(1), searching = 0; // force new search if settings change during analysis (multi-PV!)
 436             if(sscanf(line+7, "UCI2WB debug output=%d", &debug) == 1) ; else
 437             if(sscanf(line+7, "Floating Byoyomi=%d", &flob) == 1) ; else
 438             if(sscanf(line+7, "Byoyomi=%d", &byo) == 1) ; else
 439             if(p = strchr(line, '=')) {
 440                 *p++ = 0;
 441                 if(strstr(checkOptions, line+7)) sprintf(p, "%s\n", atoi(p) ? "true" : "false");
 442                 EPRINT((f, "# setoption %s%s %s%s", nameWord, line+7, valueWord, p))
 443             } else EPRINT((f, "# setoption %s%s\n", nameWord, line+7))
 444         }
 445         else if(!strcmp(command, "pause")) {
 446             if(computer == stm) myTime -= GetTickCount() - startTime;
 447             suspended = 1 + pondering; // remember if we were pondering, and stop search ignoring bestmove
 448             StopPonder(pondering || computer == stm);
 449         }
 450         else if(!strcmp(command, "easy")) {
 451             if(*canPonder) { ponder = 0; StopPonder(pondering); EPRINT((f, "# setoption %s%s %sfalse\n", nameWord, canPonder, valueWord)) }
 452         }
 453         else if(!strcmp(command, "hard")) {
 454             if(*canPonder) { ponder = 1; EPRINT((f, "# setoption %s%s %strue\n", nameWord, canPonder, valueWord)) StartPonder(); }
 455         }
 456         else difficult = 1; // difficult command; terminate loop for easy ones
 457        } // next command
 458
 459         if(!strcmp(command, "resume")) {
 460             if(suspended == 2) StartPonder(); // restart interrupted ponder search
 461             suspended = think = 0; continue;  // causes thinking to start in normal way if on move or analyzing
 462         }
 463         if(think) {      // command arrived during thinking; order abort for 'instant commands'
 464             if(!strcmp(command, "?") || !strcmp(command, "quit") ||
 465                !strcmp(command, "force") || !strcmp(command, "result")) { EPRINT((f, "# stop\n")); fflush(toE); }
 466             Sync(PAUSE); // block processing of input during thinking
 467         }
 468         if(!strcmp(command, "new")) {
 469             computer = BLACK; moveNr = 0; depth = -1; move[0][0] = 0;
 470             stm = WHITE; strcpy(iniPos, "position startpos"); frc &= ~1;
 471             if(memory != oldMem && hasHash) EPRINT((f, "# setoption %s%s %s%d\n", nameWord, hashOpt, valueWord, memory))
 472             oldMem = memory;
 473             // we can set other options here
 474             if(sc == 'x') { if(newGame) EPRINT((f, "# setoption newgame\n")) } else // optional in UCCI
 475             if(varOpt) EPRINT((f, "# setoption name UCI_Variant value chess\n"))
 476             pause = 1; // wait for option settings to take effect
 477             EPRINT((f, "# isready\n")) fflush(toE);
 478             Sync(PAUSE); // wait for readyok
 479             EPRINT((f, "# u%cinewgame\n", sc)) fflush(toE);
 480         }
 481         else if(!strcmp(command, "usermove")) {
 482             sscanf(line, "usermove %s", command); // strips off linefeed
 483             Move4Engine(command);
 484             stm = WHITE+BLACK - stm; collect = (computer == ANALYZE); sm = 0;
 485             // when pondering we either continue the ponder search as normal search, or abort it
 486             if(pondering || computer == ANALYZE) {
 487                 if(pondering && !strcmp(command, move[moveNr])) { // ponder hit
 488                     char *draw = drawOffer ? " draw" : ""; drawOffer = 0;
 489                     pondering = 0; pause = 2; moveNr++; startTime = GetTickCount(); // clock starts running now
 490                     EPRINT((f, "# ponderhit%s\n", draw)) fflush(toE); fflush(stdout);
 491                     Sync(PAUSE); // block input during thinking
 492                     goto nomove;
 493                 }
 494                 StopPonder(1); searching = 0;
 495             }
 496             strcpy(move[moveNr++], command); // possibly overwrites ponder move
 497         }
 498         else if(!strcmp(command, "level")) {
 499             int sec = 0;
 500             sscanf(line, "level %d %d:%d %d", &mps, &tc, &sec, &inc) == 4 ||
 501             sscanf(line, "level %d %d %d", &mps, &tc, &inc);
 502             tc = (60*tc + sec)*1000; inc *= 1000; sTime = 0; tc /= unit; inc /= unit;
 503         }
 504         else if(!strcmp(command, "protover")) {
 505             if(!variants) variants = sc=='s' ? "shogi,5x5+5_shogi" : VARIANTS;
 506             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);
 507             printf("feature option=\"UCI2WB debug output -check %d\"\n", debug);
 508             if(sc == 's') printf("feature option=\"Floating Byoyomi -check %d\"\nfeature option=\"Byoyomi -spin %d -1 1000\"\n", flob, byo);
 509             EPRINT((f, sc == 'x' ? "# ucci\n" : "u%ci\n", sc)) fflush(toE); // prompt UCI engine for options
 510             Sync(PAUSE); // wait for uciok
 511         }
 512         else if(!strcmp(command, "setboard")) {
 513                 stm = (strstr(line+9, " b ") ? BLACK : WHITE);
 514                 if((p = strchr(line+9, '[')) && !varOpt) { char c;
 515                     *p++ = 0; q = strchr(p, ']'); *q = 0; r = q + 4;
 516                     if(sc == 's') q[2] = 'w' + 'b' - q[2], strcpy(r=q+3, " 1\n"); // Shogi: reverse color
 517                     else r = strchr(strchr(q+4, ' ') + 1, ' '); // skip to second space (after e.p. square)
 518                     *r = 0; sprintf(command, "%s%s %s %s", line+9, q+1, p, r+1);
 519                 } else strcpy(command, line+9);
 520                 if(frc == -1 && (p = strchr(command, ' '))) strncpy(p+3, "KQkq", 4); // unannounced FRC
 521                 sprintf(iniPos, "%s%sfen %s", iniPos[0]=='p' ? "position " : "", sc=='s' ? "s" : "", command);
 522                 iniPos[strlen(iniPos)-1] = sm = 0; collect = (computer == ANALYZE);
 523         }
 524         else if(!strcmp(command, "variant")) {
 525                 if(varOpt) {
 526                     EPRINT((f, "# setoption name UCI_Variant value %sucinewgame\nisready\n", strcmp(line+8, "3check\n") ? line+8 : "threecheck\n"))
 527                     fflush(toE); Sync(PAUSE);
 528                 }
 529                 if(!strcmp(line+8, "shogi\n")) size = 9, strcpy(iniPos, "position startpos");
 530                 if(!strcmp(line+8, "5x5+5_shogi\n")) size = 5, strcpy(iniPos, "position startpos");
 531                 if(!strcmp(line+8, "xiangqi\n")) strcpy(iniPos, "fen rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR r");
 532                 if(!strcmp(line+8, "fischerandom\n")) { frc |= 1; if(frc > 0) EPRINT((f, "# setoption name UCI_Chess960 value true\n")) }
 533         }
 534         else if(!strcmp(command, "undo") && (i=1) || !strcmp(command, "remove") && (i=2)) {
 535             if(pondering || computer == ANALYZE) StopPonder(1), searching = 0;
 536             moveNr = moveNr > i ? moveNr - i : 0; collect = (computer == ANALYZE); sm = 0;
 537         }
 538         else if(!strcmp(command, ".")) {
 539             printf("stat01: %d %d %d %d 100 %s\n", statTime, statNodes, statDepth, 100-currNr, currMove);
 540             goto nomove;
 541         }
 542         else if(!strcmp(command+2, "clude") && collect > 2) { // include or exclude
 543             int all = !strcmp(line+8, "all"), in = command[1] == 'n';
 544             inex = 1; line[strlen(line)-1] = sm = 0; // strip LF and clear sm flag
 545             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
 546             if(!(sm & 2)) goto nomove; // no moves enabled; continue current search
 547             if(computer == ANALYZE) StopPonder(1), searching = 0; // abort old analysis
 548         }
 549         else if(!strcmp(command, "xboard")) ;
 550         else if(!strcmp(command, "analyze"))computer = ANALYZE, collect = 1, sm = 0, Analyze("true");
 551         else if(!strcmp(command, "exit"))   computer = NONE, StopPonder(1), searching = 0, Analyze("false");
 552         else if(!strcmp(command, "force"))  computer = NONE, StopPonder(pondering);
 553         else if(!strcmp(command, "go"))     computer = stm;
 554         else if(!strcmp(command, "time"))   sscanf(line+4, "%d", &myTime),  myTime  = (10*myTime)/unit;
 555         else if(!strcmp(command, "otim"))   sscanf(line+4, "%d", &hisTime), hisTime = (10*hisTime)/unit;
 556         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); }
 557         else if(!strcmp(command, "memory")) sscanf(line, "memory %d", &memory);
 558         else if(!strcmp(command, "cores")&& !!*threadOpt) { sscanf(line, "cores %d", &cores); EPRINT((f, "# setoption %s%s %s%d\n", nameWord, threadOpt, valueWord, cores)) }
 559         else if(!strcmp(command, "sd"))     sscanf(line, "sd %d", &depth);
 560         else if(!strcmp(command, "st"))     sscanf(line, "st %d", &sTime), sTime = 1000*sTime - 30, inc = 0, sTime /= unit;
 561         else if(!strcmp(command, "name"))   { if(namOpt) EPRINT((f, "# setoption name UCI_Opponent value none none %s %s", comp ? "computer" : "human", line+5)) }
 562         else if(!strcmp(command, "computer")) comp = 1;
 563         else if(!strcmp(command, "result")) {
 564             if(sc == 's') EPRINT((f, "# gameover %s\n", line[8] == '/' ? "draw" : (line[7] == '0') == mySide ? "win" : "lose"))
 565             computer = NONE;
 566         }
 567         else if(!strcmp(command, "quit"))   { EPRINT((f, "# quit\n")) fflush(toE), exit(atoi(line+4)); }
 568     }
 569 }
 570
 571 int
 572 StartEngine(char *cmdLine, char *dir)
 573 {
 574 #ifdef WIN32
 575   HANDLE hChildStdinRd, hChildStdinWr,
 576     hChildStdoutRd, hChildStdoutWr;
 577   BOOL fSuccess;
 578   PROCESS_INFORMATION piProcInfo;
 579   STARTUPINFO siStartInfo;
 580   DWORD err;
 581
 582   /* Create a pipe for the child's STDOUT. */
 583   if (! WinPipe(&hChildStdoutRd, &hChildStdoutWr)) return GetLastError();
 584
 585   /* Create a pipe for the child's STDIN. */
 586   if (! WinPipe(&hChildStdinRd, &hChildStdinWr)) return GetLastError();
 587
 588   SetCurrentDirectory(dir); // go to engine directory
 589
 590   /* Now create the child process. */
 591   siStartInfo.cb = sizeof(STARTUPINFO);
 592   siStartInfo.lpReserved = NULL;
 593   siStartInfo.lpDesktop = NULL;
 594   siStartInfo.lpTitle = NULL;
 595   siStartInfo.dwFlags = STARTF_USESTDHANDLES;
 596   siStartInfo.cbReserved2 = 0;
 597   siStartInfo.lpReserved2 = NULL;
 598   siStartInfo.hStdInput = hChildStdinRd;
 599   siStartInfo.hStdOutput = hChildStdoutWr;
 600   siStartInfo.hStdError = hChildStdoutWr;
 601
 602   fSuccess = CreateProcess(NULL,
 603                            cmdLine,        /* command line */
 604                            NULL,           /* process security attributes */
 605                            NULL,           /* primary thread security attrs */
 606                            TRUE,           /* handles are inherited */
 607                            DETACHED_PROCESS|CREATE_NEW_PROCESS_GROUP,
 608                            NULL,           /* use parent's environment */
 609                            NULL,
 610                            &siStartInfo, /* STARTUPINFO pointer */
 611                            &piProcInfo); /* receives PROCESS_INFORMATION */
 612
 613   if (! fSuccess) return GetLastError();
 614
 615 //  if (0) { // in the future we could trigger this by an argument
 616 //    SetPriorityClass(piProcInfo.hProcess, GetWin32Priority(appData.niceEngines));
 617 //  }
 618
 619   /* Close the handles we don't need in the parent */
 620   CloseHandle(piProcInfo.hThread);
 621   CloseHandle(hChildStdinRd);
 622   CloseHandle(hChildStdoutWr);
 623
 624   process = piProcInfo.hProcess;
 625   pid = piProcInfo.dwProcessId;
 626   fromE = (FILE*) _fdopen( _open_osfhandle((long)hChildStdoutRd, _O_TEXT|_O_RDONLY), "r");
 627   toE   = (FILE*) _fdopen( _open_osfhandle((long)hChildStdinWr, _O_WRONLY), "w");
 628 #else
 629     char *argv[10], *p, buf[200];
 630     int i, toEngine[2], fromEngine[2];
 631
 632     if (dir && dir[0] && chdir(dir)) { perror(dir); exit(1); }
 633     pipe(toEngine); pipe(fromEngine); // create two pipes
 634
 635     if ((pid = fork()) == 0) { // Child
 636         dup2(toEngine[0], 0);   close(toEngine[0]);   close(toEngine[1]);   // stdin from toE pipe
 637         dup2(fromEngine[1], 1); close(fromEngine[0]); close(fromEngine[1]); // stdout into fromE pipe
 638         dup2(1, fileno(stderr)); // stderr into frome pipe
 639
 640         strcpy(buf, cmdLine); p = buf;
 641         for (i=0;;) { argv[i++] = p; p = strchr(p, ' '); if (p == NULL) break; *p++ = 0; }
 642         argv[i] = NULL;
 643         execvp(argv[0], argv); // startup engine
 644
 645         perror(argv[0]); exit(1); // could not start engine; quit.
 646     }
 647     signal(SIGPIPE, SIG_IGN);
 648     close(toEngine[0]); close(fromEngine[1]); // close engine ends of pipes in adapter
 649
 650     fromE = (FILE*) fdopen(fromEngine[0], "r"); // make into high-level I/O
 651     toE   = (FILE*) fdopen(toEngine[1], "w");
 652 #endif
 653   return NO_ERROR;
 654 }
 655
 656 main(int argc, char **argv)
 657 {
 658         char *dir = NULL, *p, *q; int e;
 659
 660         if(argc == 2 && !strcmp(argv[1], "-v")) { printf("UCI2WB " VERSION " by H.G.Muller\n"); exit(0); }
 661         if(argc > 1 && !strcmp(argv[1], "debug")) { debug = 1; argc--; argv++; }
 662         if(argc > 1 && !strcmp(argv[1], "-var")) { variants = argv[2]; argc-=2; argv+=2; }
 663         if(argc > 1 && argv[1][0] == '-') { sc = argv[1][1]; argc--; argv++; }
 664         if(argc < 2) { printf("usage is: U%cI2WB [debug] [-s] <engine.exe> [<engine directory>]\n", sc-32); exit(-1); }
 665         if(argc > 2) dir = argv[2];
 666         if(argc > 3) strncpy(suffix, argv[3], 80);
 667
 668         if(sc == 'x') nameWord = valueWord = bTime = "", wTime = "opp", bInc = "increment", wInc = "oppincrement", unit = 1000; // switch to UCCI keywords
 669         else if(sc == 'f' ) frc = -1, sc = 'c';   // UCI for unannounced Chess960
 670         else if(sc == 'n') sc = 'c'; // UCI for normal Chess
 671
 672         // spawn engine proc
 673         if(StartEngine(argv[1], dir) != NO_ERROR) { perror(argv[1]), exit(-1); }
 674
 675         Sync(INIT);
 676
 677         // create separate thread to handle engine->GUI traffic
 678 #ifdef WIN32
 679         CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) Engine2GUI, (LPVOID) NULL, 0, &thread_id);
 680 #else
 681         { pthread_t t; signal(SIGINT, SIG_IGN); signal(SIGTERM, SIG_IGN); pthread_create(&t, NULL, Engine2GUI, NULL); }
 682 #endif
 683
 684         // handle GUI->engine traffic in original thread
 685         GUI2Engine();
 686 }