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 "3.0"
  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 #define STDVARS "chess,chess960,crazyhouse,threecheck,giveaway,atomic,seirawan,shogi,xiangqi"
  35 #define EGT ",gaviotatbpath,syzygypath,nalimovpath,"
  36
  37 #define DPRINT if(debug) printf
  38 #define EPRINT(X) { char f[999]; sprintf X; DPRINT("%s", f); fprintf(toE, "%s", f + 2*(*f == '#')); /* strip optional # prefix */ }
  39
  40 #define WHITE 0
  41 #define BLACK 1
  42 #define NONE  2
  43 #define ANALYZE 3
  44
  45 char move[2000][10], iniPos[256], hashOpt[20], pause, pondering, suspended, ponder, post, hasHash, c, sc='c', suffix[81], varOpt, searching, *binary;
  46 int mps, tc, inc, sTime, depth, myTime, hisTime, stm, computer = NONE, memory, oldMem=0, cores, moveNr, lastDepth, lastScore, startTime, debug, flob;
  47 int statDepth, statScore, statNodes, statTime, currNr, size, collect, nr, sm, inex, on[500], frc, byo = -1, namOpt, comp;
  48 char currMove[20], moveMap[500][10], /* for analyze mode */ canPonder[20], threadOpt[20], varList[8000], anaOpt[20], backLog[10000], checkOptions[8192] = "Ponder";
  49 char pvs[99][999], board[100];  // XQ board for UCCI
  50 char *nameWord = "name ", *valueWord = "value ", *wTime = "w", *bTime = "b", *wInc = "winc", *bInc = "binc", newGame; // keywords that differ in UCCI
  51 int unit = 1, drawOffer, scores[99], mpvSP, maxDepth;
  52 volatile int logLen, sentLen;
  53
  54 FILE *toE, *fromE, *fromF;
  55 int pid;
  56
  57 #ifdef WIN32
  58 char *strcasestr (char *p, char *q) { while(*p) { char *r=p++, *s=q; while(tolower(*r++) == tolower(*s) && *s) s++; if(!*s) return p-1; } return NULL; }
  59
  60 WinPipe(HANDLE *hRd, HANDLE *hWr)
  61 {
  62   SECURITY_ATTRIBUTES saAttr;
  63
  64   /* Set the bInheritHandle flag so pipe handles are inherited. */
  65   saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
  66   saAttr.bInheritHandle = TRUE;
  67   saAttr.lpSecurityDescriptor = NULL;
  68
  69   /* Create a pipe */
  70   return CreatePipe(hRd, hWr, &saAttr, 0);
  71 }
  72 #endif
  73
  74 #define INIT 0
  75 #define WAKEUP 1
  76 #define PAUSE 2
  77
  78 void
  79 Sync (int action)
  80 {
  81 #ifdef WIN32
  82         static HANDLE hWr, hRd; DWORD d; char c;
  83         switch(action) {
  84             case INIT:   WinPipe(&hRd, &hWr); break;
  85             case WAKEUP: WriteFile(hWr, "\n", 1, &d, NULL); break;
  86             case PAUSE:  ReadFile(hRd, &c, 1, &d, NULL);
  87         }
  88 #else
  89         static int syncPipe[2]; char c;
  90         switch(action) {
  91             case INIT:   pipe(syncPipe); break;
  92             case WAKEUP: write(syncPipe[1], "\n", 1); break;
  93             case PAUSE:  read(syncPipe[0], &c, 1);
  94         }
  95 #endif
  96 }
  97
  98 void
  99 FromFEN(char *fen)
 100 {       int i=0;
 101         while(*fen) {
 102             char c = *fen++;
 103             if(c >= 'A') board[i++] = c; else
 104             if(c == '/') i++; else
 105             if(c == ' ') break; else
 106             while(c-- > '0' && i < 99) board[i++] = 0;
 107             if(i >= 99) break;
 108         }
 109 }
 110
 111 char *
 112 ToFEN(int stm)
 113 {
 114         int i, n=0; static char fen[200]; char *p = fen;
 115         for(i=0; i<99; i++) {
 116             char c = board[i];
 117             if(c >= 'A')  { if(n) *p++ = '0' + n; n = 0;  *p++ = c; } else n ++;
 118             if(i%10 == 8) { if(n) *p++ = '0' + n; n = -1; *p++ = '/'; }
 119         }
 120         sprintf(p-1, " %c - - 0 1", stm);
 121         return fen;
 122 }
 123
 124 int
 125 Sqr(char *m, int j)
 126 {
 127         int n = m[j] - 'a' + 10*('9' - m[j+1]);
 128         if(n < 0) n = 0; else if(n > 99) n = 99; return n;
 129 }
 130
 131 int
 132 Play(int nr)
 133 {
 134         int i, last = -1;
 135         FromFEN(iniPos + 4); // in XQ iniPos always has just "fen " prefix
 136         for(i=0; i<nr; i++) {
 137             int from=Sqr(move[i], 0), to=Sqr(move[i], 2);
 138             if(board[to] || (board[from]|32)  == 'p' && move[i][1] != move[i][3]) last = i;
 139             board[to] = board[from]; board[from] = 0;
 140         }
 141         return last;
 142 }
 143
 144 void
 145 StartSearch(char *ponder)
 146 {       // send the 'go' command to engine. Suffix by ponder.
 147         int x = (ponder[0] != 0);                   // during ponder stm is the opponent
 148         int black = (stm == BLACK ^ x ^ sc == 's'); // set if our color is what the engine calls black
 149         int nr = moveNr + x;                        // we ponder for one move ahead!
 150         int t = (flob ? inc + myTime/40 : 1000*byo*(byo>0)); // byoyomi time
 151         if(sc == 'x') black = 1; else drawOffer = 0;// in UCCI 'black' refers to us and 'white' to opponent
 152         if(!x && drawOffer) ponder = " draw", drawOffer = 0; //pass draw offer only when not pondering
 153         EPRINT((f, "# go%s %stime %d %stime %d", ponder, bTime, (black ? myTime : hisTime) - t, wTime, (!black ? myTime : hisTime) - t))
 154         if(sTime > 0) EPRINT((f, " movetime %d", sTime)) else
 155         if(mps) EPRINT((f, " movestogo %d", mps*(nr/(2*mps)+1)-nr/2))
 156         if(flob || byo >= 0) sprintf(suffix, " byoyomi %d", t); // for engines running purely on byoyomi
 157         if(inc && !*suffix) EPRINT((f, " %s %d %s %d", wInc, inc, bInc, inc))
 158         if(depth > 0) EPRINT((f, " depth %d", depth))
 159         if(*suffix) EPRINT((f, suffix, inc))
 160         EPRINT((f, "\n")); maxDepth = mpvSP = 0;
 161 }
 162
 163 void
 164 StopPonder(int pondering)
 165 {
 166         if(!pondering) return;
 167         pause = 1;
 168         EPRINT((f, "# stop\n")) fflush(toE); // note: 'pondering' remains set until engine acknowledges 'stop' with 'bestmove'
 169         Sync(PAUSE); // wait for engine to acknowledge 'stop' with 'bestmove'.
 170 }
 171
 172 void
 173 LoadPos(int moveNr)
 174 {
 175         int j, lastCapt = 0; char *pos = iniPos, buf[200], stm;
 176         if(sc == 'x') { // UCCI: send only reversible moves
 177             lastCapt = Play(moveNr); // find last capture (returns -1 if none!)
 178             Play(++lastCapt);        // reconstruct board after last capture
 179             stm = (!strstr(iniPos+4, " b ") ^ lastCapt & 1 ? 'w' :  'b');
 180             sprintf(buf, "position fen %s", ToFEN(stm)); pos = buf; // send it as FEN (with "position" in UCCI!)
 181         }
 182         EPRINT((f, "# %s moves", pos))
 183         for(j=lastCapt; j<moveNr; j++) EPRINT((f, " %s", move[j]))
 184         EPRINT((f, "\n"))
 185 }
 186
 187 void
 188 StartPonder()
 189 {
 190         if(!move[moveNr][0]) return; // no ponder move
 191         LoadPos(moveNr+1);
 192         pondering = 1; lastDepth = 1;
 193         StartSearch(" ponder");
 194 }
 195
 196 void
 197 Analyze(char *val)
 198 {
 199     if(*anaOpt) EPRINT((f, "# setoption %s%s %s%s\n", nameWord, anaOpt, valueWord, val));
 200 }
 201
 202 int
 203 Release()
 204 {   // send setoption commands backlogged during thinking to engine, aborting ponder or analysis search if necessary
 205     int len = logLen - sentLen, analyse = searching;
 206     if(len <= 0) return 0;
 207     StopPonder(pondering | searching); pondering = searching = 0; // force new search if settings change during analysis (multi-PV!)
 208     fwrite(backLog + sentLen, 1, len, toE); sentLen += len; DPRINT("# release %d\n", len);
 209     if(ponder && computer == 1 - stm) StartPonder(); // (re)start ponder search
 210     return analyse; // return 1 if analysis search should be restarted
 211 }
 212
 213 char *Convert(char *pv)
 214 {   // convert Shogi coordinates to WB
 215     char *p, *q, c;
 216     static char buf[10000];
 217     if(sc != 's') return pv;
 218     p = pv; q = buf;
 219     while(c = *p++) {
 220         if(c >= '0' && c <= '9' || c >= 'a' && c <= 'z') *q++ = 'a'+'0'+size - c; else *q++ = c;
 221     }
 222     *q++ = 0;
 223     return buf;
 224 }
 225
 226 void
 227 Move4GUI(char *m)
 228 {
 229     if(sc == 's') {
 230       // convert USI move to WB format
 231       m[2] = 'a'+'0'+size - m[2];
 232       m[3] = 'a'+'0'+size - m[3];
 233       if(m[1] == '*') { // drop
 234         m[1] = '@';
 235       } else {
 236         m[0] = 'a'+'0'+size - m[0];
 237         m[1] = 'a'+'0'+size - m[1];
 238         if((stm == WHITE ? (m[1]>'0'+size-size/3 || m[3]>'0'+size-size/3)
 239                                 : (m[1] <= '0'+size/3 || m[3] <= '0'+size/3)) && m[4] != '+')
 240              m[4] = '=', m[5] = 0;
 241       }
 242     }
 243 }
 244
 245 int
 246 GetChar()
 247 {
 248     int c;
 249     if(fromF) {
 250         if((c = fgetc(fromF)) != EOF) return c;
 251         fclose(fromF); fromF = 0; printf("# end fake\n");
 252     }
 253     return fgetc(fromE);
 254 }
 255
 256 void *
 257 Engine2GUI()
 258 {
 259     char line[1024], command[256]; static char egts[999];
 260
 261     if(fromF = fopen("DefectiveEngineOptions.ini", "r")) printf("# fake engine input\n");
 262     while(1) {
 263         int i=0, x; char *p, dummy, len;
 264
 265         fflush(stdout); fflush(toE);
 266         while((line[i] = x = GetChar()) != EOF && line[i] != '\n') i++;
 267         line[++i] = 0;
 268         if(x == EOF) printf("tellusererror UCI2WB: %s died on me\n", binary), exit(0);
 269         DPRINT("# engine said: %s", line), fflush(stdout);
 270         if(sscanf(line, "%s", command) != 1) continue;
 271         if(!strcmp(command, "bestmove")) {
 272             if(pause == 1) { pondering = pause = 0; Sync(WAKEUP); continue; } // bestmove was reply to ponder miss or analysis result; ignore.
 273             else if(pondering) { pondering = 0; printf("%d 0 0 0 UCI violation! Engine moves during ponder\n", lastDepth+1); continue; } // ignore ponder search
 274             // move was a move to be played
 275             if(p = strstr(line+8, " draw")) *p = 0, printf("offer draw\n"); // UCCI
 276             if(strstr(line+9, "resign")) { printf("resign\n"); computer = NONE; }
 277             if(strstr(line+9, "win")) { printf("%s {claim}\n", stm== WHITE ? "1-0" :"0-1"); computer = NONE; } // USI
 278             if(strstr(line+9, "(none)") || strstr(line+9, "null") ||
 279                strstr(line+9, "0000")) { printf("%s\n", lastScore < -99999 ? "resign" : "1/2-1/2 {stalemate}"); computer = NONE; }
 280             sscanf(line, "bestmove %s", move[moveNr++]);
 281             Release(); // send setoption commands that arrived during search
 282             myTime -= (GetTickCount() - startTime)*1.02 + inc; // update own clock, so we can give correct wtime, btime with ponder
 283             if(mps && ((moveNr+1)/2) % mps == 0) myTime += tc; if(sTime) myTime = sTime; // new session or move starts
 284             stm = WHITE+BLACK - stm;
 285             // first start a new ponder search, if pondering is on and we have a move to ponder on
 286             if(p = strstr(line+9, "ponder")) {
 287               sscanf(p+7, "%s", move[moveNr]);
 288               if(computer != NONE && ponder) {
 289                 DPRINT("# ponder on %s\n", move[moveNr]);
 290                 StartPonder();
 291               }
 292               p[-1] = '\n'; *p = 0; // strip off ponder move
 293             } else move[moveNr][0] = 0;
 294             Move4GUI(line+9);
 295             printf("move %s\n", line+9); // send move to GUI
 296             if(move[moveNr][0]) printf("Hint: %s\n", move[moveNr]);
 297             if(pause) { pause = 0; Sync(WAKEUP); } // release commands that came in during think
 298             if(lastScore == 100001 && iniPos[0] != 'f') { printf("%s {mate}\n", stm == BLACK ? "1-0" : "0-1"); computer = NONE; }
 299         }
 300         else if(!strcmp(command, "info")) {
 301             int d=0, s=0, t=(GetTickCount() - startTime)/10, n=1;
 302             char *pv, varName[80];
 303             if(sscanf(line+5, "string times @ %c", &dummy) == 1) { printf("# %s", line+12); continue; }
 304             if(sscanf(line+5, "string variant %s", varName) == 1) {
 305                 if(!strstr(STDVARS, varName) && (p = strstr(line+18, " startpos "))) printf("setup (-) 8x8+0_fairy %s", p+10);
 306                 continue;
 307             }
 308             if(collect && (pv = strstr(line+5, "currmove "))) {
 309                 if(p = strstr(line+5, "currmovenumber ")) {
 310                     n = atoi(p+15);
 311                     if(collect == 1 && n != 1) continue; // wait for move 1
 312                     if(collect + (n == 1) > 2) { // done collecting
 313                         if(inex && collect == 2) printf("%d 0 0 0 OK to exclude\n", lastDepth);
 314                         collect = 3; continue;
 315                     }
 316                     collect = 2; on[nr=n] = 1; sscanf(pv+9, "%s", moveMap[n]); continue; // store move
 317                 }
 318             }
 319             if(!post) continue;
 320             if(sscanf(line+5, "string %c", &dummy) == 1) printf("%d 0 0 0 %s", lastDepth, line+12); else {
 321                 if(p = strstr(line+4, " depth "))      sscanf(p+7, "%d", &d), statDepth = d;
 322                 if(p = strstr(line+4, " score cp "))   sscanf(p+10, "%d", &s), statScore = s; else
 323                 if(p = strstr(line+4, " score mate ")) sscanf(p+12, "%d", &s), s += s>0 ? 100000 : -100000, statScore = s; else
 324                 if(p = strstr(line+4, " score "))      sscanf(p+7, "%d", &s), statScore = s;
 325                 if(p = strstr(line+4, " nodes "))      sscanf(p+7, "%d", &n), statNodes = n;
 326                 if(p = strstr(line+4, " time "))       sscanf(p+6, "%d", &t), t /= 10, statTime = t;
 327                 if(p = strstr(line+4, " currmove "))   sscanf(p+10,"%s", currMove);
 328                 if(p = strstr(line+4, " currmovenumber ")) sscanf(p+16,"%d", &currNr);
 329                 if(pv = strstr(line+4, " pv ")) { // convert PV info to WB thinking output
 330                   if(d > maxDepth) maxDepth = d, mpvSP = 0; else if(d < maxDepth) continue; // ignore depth regressions
 331                   for(i=0; i<mpvSP; i++) if(s == scores[i] && !strcmp(pvs[i], pv+4)) break; // check if duplicat
 332                   if(i >= mpvSP) strncpy(pvs[mpvSP], pv+4, 998), scores[mpvSP++] = s,       // emit as thinking output if not
 333                     printf("%3d  %6d %6d %10d %s", lastDepth=d, lastScore=s, t, n, Convert(pv+4));
 334                 } else if(s == -100000) lastScore = s; // when checkmated score is valid even without PV (which might not come)
 335             }
 336         }
 337         else if(!strcmp(command, "option")) { // USI option: extract data fields
 338             char name[80], type[80], buf[1024], val[256], *q;
 339             int min=0, max=1e9; *val = 0;
 340             if(p = strstr(line+6, " type ")) sscanf(p+1, "type %s", type), *p = '\n';
 341             if(p = strstr(line+6, " min "))  sscanf(p+1, "min %d", &min), *p = '\n';
 342             if(p = strstr(line+6, " max "))  sscanf(p+1, "max %d", &max), *p = '\n';
 343             if(p = strstr(line+6, " default "))  sscanf(p+1, "default %[^\n]*", val), *p = '\n';
 344             if(!(p = strstr(line+6, " name "))) p = line+1; sscanf(p+6, "%[^\n]", name); // 'name' is omitted in UCCI
 345             if(!strcasecmp(name, "UCI_Chess960")) { frc=2; continue; }
 346             if(!strcasecmp(name, "UCI_Variant")) { if(p = strstr(line+6, " var ")) strcpy(varList, p); varOpt = 1; continue; }
 347             if(!strcasecmp(name, "UCI_Opponent")) { namOpt = 1; continue; }
 348             if(!strcasecmp(name+2, "I_AnalyseMode")) { strcpy(anaOpt, name); continue; }
 349             if(frc< 0 && (strstr(name, "960") || strcasestr(name, "frc")) && !strcmp(type, "check")) {
 350                 EPRINT((f, "# setoption name %s value true\n", name)) strcpy(val, "true"); // set non-standard suspected FRC options
 351             }
 352             if(!strcasecmp(name, "Threads")) { strcpy(threadOpt, name); continue; }
 353             if(!strcasecmp(name, "Ponder") || !strcasecmp(name, "USI_Ponder")) { strcpy(canPonder, name); continue; }
 354             if(!strcasecmp(name, "Hash") || !strcasecmp(name, "USI_Hash") || !strcasecmp(name, "hashsize")) {
 355                 memory = oldMem = atoi(val); hasHash = 1;
 356                 strcpy(hashOpt, name);
 357                 continue;
 358             }
 359             if(!strcasecmp(name, "newgame") && !strcmp(type, "button")) { newGame++; continue; }
 360             if(!strcasecmp(name, "usemillisec")) { unit = (!strcmp(val, "false") ? 2 : 1); continue; }
 361             sprintf(buf, ",%s,", name); if(strcasestr(EGT, buf)) { buf[strlen(buf)-5-2*(buf[3]=='v')] = 0; strcat(egts, buf); continue; } // collect EGT formats
 362             // pass on engine-defined option as WB option feature
 363             if(!strcmp(type, "filename")) type[4] = 0;
 364             else if(sc == 'c' && !strcmp(type, "string")) { // in UCI try to guess which strings are file or directory names
 365                 if(strcasestr(name, "file")) strcpy(type, "file"); else
 366                 if(strcasestr(name, "path") || strcasestr(name, "directory") || strcasestr(name, "folder")) strcpy(type, "path");
 367             }
 368             sprintf(buf, "feature option=\"%s -%s", name, type); q = buf + strlen(buf);
 369             if(     !strcmp(type, "file")
 370                  || !strcmp(type, "string")) sprintf(q, " %s\"\n", val);
 371             else if(!strcmp(type, "spin"))   sprintf(q, " %d %d %d\"\n", atoi(val), min, max);
 372             else if(!strcmp(type, "check"))  sprintf(q, " %d\"\n", strcmp(val, "true") ? 0 : 1), strcat(checkOptions, name);
 373             else if(!strcmp(type, "button")) sprintf(q, "\"\n");
 374             else if(!strcmp(type, "combo")) {
 375                 if(p = strstr(line+6, " default "))  sscanf(p+1, "default %s", type); // current setting
 376                 min = 0; p = line+6;
 377                 while(p = strstr(p, " var ")) {
 378                     sscanf(p += 5, "%s", val); // next choice
 379                     sprintf(buf + strlen(buf), "%s%s%s", min++ ? " /// " : " ", strcmp(type, val) ? "" : "*", val);
 380                 }
 381                 strcat(q, "\"\n");
 382             }
 383             else buf[0] = 0; // ignore unrecognized option types
 384             if(buf[0]) printf("%s", buf);
 385         }
 386         else if(!strcmp(command, "id")) {
 387             static char name[256], version[256];
 388             if(sscanf(line, "id name %[^\n]", name) == 1) printf("feature myname=\"%s (U%cI2WB)\"\n", name, sc-32);
 389             if(sscanf(line, "id version %[^\n]", version) == 1 && *name) printf("feature myname=\"%s %s (U%cI2WB)\"\n", name, version, sc-32);
 390         }
 391         else if(!strcmp(command, "readyok")) { pause = 0; Sync(WAKEUP); } // resume processing of GUI commands
 392         else if(sc == 'x'&& !strcmp(command, "ucciok") || sscanf(command, "u%ciok", &c)==1 && c==sc) {
 393             char *p = varList, *q = varList;
 394             while(*q && *q != '\n')  if(!strncmp(q, " var ", 5)) *p++ = ',', q +=5; // replace var keywords by commas
 395                                 else if(!strncmp(q-1, " chess ", 7)) strcpy(p, "normal"), p += 6, q += 5; // 'chess' is called 'normal' in CECP
 396                                 else if(!strncmp(q-1, " threecheck", 11)) *p++ = '3', q += 5; // 'threecheck' is written '3check' in CECP
 397                                 else *p++ = *q++; // copy other variant names unmodified
 398             if(frc) sprintf(p, ",normal,fischerandom"), printf("feature oocastle=%d\n", frc<0); // unannounced FRC uses O-O castling
 399             if(*varList) printf("feature variants=\"%s\"\n", varList+1); // from UCI_Variant combo and/or UCI_Chess960 check options
 400             if(*egts) { for(p=egts; *p = tolower(*p); p++); printf("feature egt=\"%s\"\n", egts+1); }
 401             printf("feature smp=1 memory=%d done=1\n", hasHash);
 402             if(unit == 2) { unit = 1; EPRINT((f, "# setoption usemillisec true\n")) }
 403             Sync(WAKEUP); // done with options
 404         }
 405     }
 406 }
 407
 408 void
 409 Move4Engine(char *m)
 410 {
 411     if(sc == 's') {
 412       // convert input move to USI format
 413       if(m[1] == '@') { // drop
 414         m[1] = '*';
 415       } else {
 416         m[0] = 'a'+'0'+size - m[0];
 417         m[1] = 'a'+'0'+size - m[1];
 418       }
 419       m[2] = 'a'+'0'+size - m[2];
 420       m[3] = 'a'+'0'+size - m[3];
 421       if(m[4] == '=') m[4] = 0; // no '=' in USI format!
 422       else if(m[4]) m[4] = '+'; // cater to WB 4.4 bug :-(
 423     }
 424 }
 425
 426 void
 427 GUI2Engine()
 428 {
 429     char line[256], command[256], *p, *q, *r, mySide, type[99];
 430
 431     while(1) {
 432         int i, x, difficult, think=0;
 433
 434         if((computer == stm || computer == ANALYZE && !searching) && !suspended) {
 435             DPRINT("# start search\n");
 436             LoadPos(moveNr); fflush(stdout); // load position
 437             // and set engine thinking (note USI swaps colors!)
 438             startTime = GetTickCount(); mySide = stm; // remember side we last played for
 439             if(computer == ANALYZE) {
 440                 EPRINT((f, "# go infinite")); maxDepth = mpvSP = 0;
 441                 if(sm & 1) { // some moves are disabled
 442                     EPRINT((f, " searchmoves"))
 443                     for(i=1; i<nr; i++) if(on[i]) EPRINT((f, " %s", moveMap[i]))
 444                 }
 445                 EPRINT((f, "\n")) searching = 1; // suppresses spurious commands during analysis starting new searches
 446             } else pause = think = 2, StartSearch(""); // request suspending of input processing while thinking
 447         }
 448       nomove:
 449        for(difficult=0; !difficult; ) { // read and handle commands that can (or must) be handled during thinking
 450         fflush(toE); fflush(stdout);
 451         i = 0; while((x = getchar()) != EOF && (line[i] = x) != '\n') i++;
 452         line[++i] = 0; if(x == EOF) { printf("# EOF\n"); sprintf(line, "quit -1\n"); }
 453         if(think && !pause) Sync(PAUSE), think = 0, Release(); // if no longer thinking, take dummy pause
 454         sscanf(line, "%s", command); DPRINT("# '%s' think=%d pause=%d log=%d sent=%d\n", command, think, pause, logLen, sentLen);
 455         if(!strcmp(command, "usermove")) { difficult--; break; } // for efficiency during game play, moves, time & otim are tried first
 456         else if(!strcmp(command, "time"))   sscanf(line+4, "%d", &myTime),  myTime  = (10*myTime)/unit;
 457         else if(!strcmp(command, "otim"))   sscanf(line+4, "%d", &hisTime), hisTime = (10*hisTime)/unit;
 458         else if(!strcmp(command, "offer")) drawOffer = 1; // backlogged anyway, so this can be done instantly
 459         else if(!strcmp(command, "post"))  post = 1;
 460         else if(!strcmp(command, "nopost"))post = 0;
 461         else if(!strcmp(command, "pause")) {
 462             if(computer == stm) myTime -= GetTickCount() - startTime;
 463             suspended = 1 + pondering; // remember if we were pondering, and stop search ignoring bestmove
 464             StopPonder(pondering || computer == stm);
 465         }
 466         else { //convert easy & hard to "option" after treating their effect on the adapter
 467           if(!strcmp(command, "easy")) {
 468             if(*canPonder) ponder = 0, sprintf(command, "option"), sprintf(line, "option %s=0\n", canPonder); else continue;
 469           }
 470           else if(!strcmp(command, "hard")) {
 471             if(*canPonder) ponder = 1, sprintf(command, "option"), sprintf(line, "option %s=1\n", canPonder); else continue;
 472           }
 473           if(!strcmp(command, "option")) {
 474             char *p;
 475             if(logLen == sentLen) logLen = 0, sentLen = 0; // engine is up to date; reset buffer
 476             if(sscanf(line+7, "UCI2WB debug output=%d", &debug) == 1) ; else
 477             if(sscanf(line+7, "Floating Byoyomi=%d", &flob) == 1) ; else
 478             if(sscanf(line+7, "Byoyomi=%d", &byo) == 1) ; else
 479             if(p = strchr(line, '=')) {
 480                 *p++ = 0;
 481                 if(strstr(checkOptions, line+7)) sprintf(p, "%s\n", atoi(p) ? "true" : "false");
 482                 snprintf(backLog+logLen, 9999-logLen, "setoption %s%s %s%s", nameWord, line+7, valueWord, p);
 483             } else snprintf(backLog+logLen, 9999-logLen, "setoption %s%s\n", nameWord, line+7);
 484             DPRINT("# backlog: %s", backLog+logLen); logLen += strlen(backLog+logLen);
 485             if(!think && Release()) break; // break will restart analysis; pondering is restarted by Release itself
 486           }
 487           else difficult = 1; // difficult command; terminate loop for easy ones
 488         }
 489        } // next command
 490
 491         // some commands that should never come during thinking can be safely processed here
 492         if(difficult < 0) { // used as kludge to signal "usermove" was already matched
 493             sscanf(line, "usermove %s", command); // strips off linefeed
 494             Move4Engine(command);
 495             stm = WHITE+BLACK - stm; collect = (computer == ANALYZE); sm = 0;
 496             // when pondering we either continue the ponder search as normal search, or abort it
 497             if(pondering || computer == ANALYZE) {
 498                 if(pondering && !strcmp(command, move[moveNr])) { // ponder hit
 499                     char *draw = drawOffer ? " draw" : ""; drawOffer = 0;
 500                     pondering = 0; pause = 2; moveNr++; startTime = GetTickCount(); // clock starts running now
 501                     EPRINT((f, "# ponderhit%s\n", draw)) fflush(toE); fflush(stdout);
 502                     think = 2; // request blocking input during thinking
 503                     goto nomove;
 504                 }
 505                 StopPonder(1); searching = 0;
 506             }
 507             strcpy(move[moveNr++], command); // possibly overwrites ponder move
 508             continue;
 509         }
 510         if(!strcmp(command, "resume")) {
 511             if(suspended == 2) StartPonder(); // restart interrupted ponder search
 512             suspended = think = 0; continue;  // causes thinking to start in normal way if on move or analyzing
 513         }
 514         if(think) { // command arrived during thinking; order abort for 'instant commands'
 515             if(!strcmp(command, "?") || !strcmp(command, "quit") ||
 516                !strcmp(command, "force") || !strcmp(command, "result")) { EPRINT((f, "# stop\n")); fflush(toE); }
 517             Sync(PAUSE); Release(); // block processing of difficult commands during thinking; send backlog left because of race
 518         }
 519         if(!strcmp(command, "new")) {
 520             computer = BLACK; moveNr = 0; depth = -1; move[0][0] = 0;
 521             stm = WHITE; strcpy(iniPos, "position startpos"); frc &= ~1;
 522             if(memory != oldMem && hasHash) EPRINT((f, "# setoption %s%s %s%d\n", nameWord, hashOpt, valueWord, memory))
 523             oldMem = memory;
 524             // we can set other options here
 525             if(sc == 'x') { if(newGame) EPRINT((f, "# setoption newgame\n")) } else // optional in UCCI
 526             if(varOpt) EPRINT((f, "# setoption name UCI_Variant value chess\n"))
 527             pause = 1; // wait for option settings to take effect
 528             EPRINT((f, "# isready\n")) fflush(toE);
 529             Sync(PAUSE); // wait for readyok
 530             EPRINT((f, "# u%cinewgame\n", sc)) fflush(toE);
 531         }
 532         else if(!strcmp(command, "level")) {
 533             int sec = 0;
 534             sscanf(line, "level %d %d:%d %d", &mps, &tc, &sec, &inc) == 4 ||
 535             sscanf(line, "level %d %d %d", &mps, &tc, &inc);
 536             tc = (60*tc + sec)*1000; inc *= 1000; sTime = 0; tc /= unit; inc /= unit;
 537         }
 538         else if(!strcmp(command, "protover")) {
 539             if(!varList[0]) strcpy(varList, sc=='s' ? ",shogi,5x5+5_shogi" : VARIANTS);
 540             printf("feature setboard=1 usermove=1 debug=1 ping=1 name=1 reuse=0 exclude=1 pause=1 sigint=0 sigterm=0 done=0\n");
 541             printf("feature option=\"UCI2WB debug output -check %d\"\n", debug);
 542             if(sc == 's') printf("feature option=\"Floating Byoyomi -check %d\"\nfeature option=\"Byoyomi -spin %d -1 1000\"\n", flob, byo);
 543             EPRINT((f, sc == 'x' ? "# ucci\n" : "# u%ci\n", sc)) fflush(toE); // prompt UCI engine for options
 544             Sync(PAUSE); // wait for uciok
 545         }
 546         else if(!strcmp(command, "setboard")) {
 547                 stm = (strstr(line+9, " b ") ? BLACK : WHITE);
 548                 if((p = strchr(line+9, '[')) && !varOpt) { char c;
 549                     *p++ = 0; q = strchr(p, ']'); *q = 0; r = q + 4;
 550                     if(sc == 's') q[2] = 'w' + 'b' - q[2], strcpy(r=q+3, " 1\n"); // Shogi: reverse color
 551                     else r = strchr(strchr(q+4, ' ') + 1, ' '); // skip to second space (after e.p. square)
 552                     *r = 0; sprintf(command, "%s%s %s %s", line+9, q+1, p, r+1);
 553                 } else strcpy(command, line+9);
 554                 if(frc == -1 && (p = strchr(command, ' '))) strncpy(p+3, "KQkq", 4); // unannounced FRC
 555                 sprintf(iniPos, "%s%sfen %s", iniPos[0]=='p' ? "position " : "", sc=='s' ? "s" : "", command);
 556                 iniPos[strlen(iniPos)-1] = sm = 0; collect = (computer == ANALYZE);
 557         }
 558         else if(!strcmp(command, "variant")) {
 559                 if(varOpt) {
 560                     EPRINT((f, "# setoption name UCI_Variant value %sucinewgame\nisready\n", strcmp(line+8, "3check\n") ? line+8 : "threecheck\n"))
 561                     fflush(toE); Sync(PAUSE);
 562                 }
 563                 if(!strcmp(line+8, "shogi\n")) size = 9, strcpy(iniPos, "position startpos");
 564                 if(!strcmp(line+8, "5x5+5_shogi\n")) size = 5, strcpy(iniPos, "position startpos");
 565                 if(!strcmp(line+8, "xiangqi\n")) strcpy(iniPos, "fen rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR r");
 566                 if(!strcmp(line+8, "fischerandom\n")) { frc |= 1; if(frc > 0) EPRINT((f, "# setoption name UCI_Chess960 value true\n")) }
 567         }
 568         else if(!strcmp(command, "undo") && (i=1) || !strcmp(command, "remove") && (i=2)) {
 569             if(pondering || computer == ANALYZE) StopPonder(1), searching = 0;
 570             moveNr = moveNr > i ? moveNr - i : 0; collect = (computer == ANALYZE); sm = 0;
 571         }
 572         else if(!strcmp(command, ".")) {
 573             printf("stat01: %d %d %d %d 100 %s\n", statTime, statNodes, statDepth, 100-currNr, currMove);
 574             goto nomove;
 575         }
 576         else if(!strcmp(command+2, "clude") && collect > 2) { // include or exclude
 577             int all = !strcmp(line+8, "all"), in = command[1] == 'n';
 578             inex = 1; line[strlen(line)-1] = sm = 0; // strip LF and clear sm flag
 579             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
 580             if(!(sm & 2)) goto nomove; // no moves enabled; continue current search
 581             if(computer == ANALYZE) StopPonder(1), searching = 0; // abort old analysis
 582         }
 583         else if(!strcmp(command, "xboard")) ;
 584         else if(!strcmp(command, "analyze"))computer = ANALYZE, collect = 1, sm = 0, Analyze("true");
 585         else if(!strcmp(command, "exit"))   computer = NONE, StopPonder(1), searching = 0, Analyze("false");
 586         else if(!strcmp(command, "force"))  computer = NONE, StopPonder(pondering);
 587         else if(!strcmp(command, "go"))     computer = stm;
 588         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); }
 589         else if(!strcmp(command, "memory")) sscanf(line, "memory %d", &memory);
 590         else if(!strcmp(command, "cores")&& !!*threadOpt) { sscanf(line, "cores %d", &cores); EPRINT((f, "# setoption %s%s %s%d\n", nameWord, threadOpt, valueWord, cores)) }
 591         else if(!strcmp(command, "egtpath")){
 592             sscanf(line+8, "%s %[^\n]", type, command);
 593             EPRINT((f, "# setoption name %s%sPath value %s\n", type, *type == 'g' ? "Tb" : "", command));
 594         }
 595         else if(!strcmp(command, "sd"))     sscanf(line, "sd %d", &depth);
 596         else if(!strcmp(command, "st"))     sscanf(line, "st %d", &sTime), sTime = 1000*sTime - 30, inc = 0, sTime /= unit;
 597         else if(!strcmp(command, "name"))   { if(namOpt) EPRINT((f, "# setoption name UCI_Opponent value none none %s %s", comp ? "computer" : "human", line+5)) }
 598         else if(!strcmp(command, "computer")) comp = 1;
 599         else if(!strcmp(command, "result")) {
 600             if(sc == 's') EPRINT((f, "# gameover %s\n", line[8] == '/' ? "draw" : (line[7] == '0') == mySide ? "win" : "lose"))
 601             computer = NONE;
 602         }
 603         else if(!strcmp(command, "quit"))   { EPRINT((f, "# quit\n")) fflush(toE), exit(atoi(line+4)); }
 604     }
 605 }
 606
 607 int
 608 StartEngine(char *cmdLine, char *dir)
 609 {
 610 #ifdef WIN32
 611   HANDLE hChildStdinRd, hChildStdinWr,
 612     hChildStdoutRd, hChildStdoutWr;
 613   BOOL fSuccess;
 614   PROCESS_INFORMATION piProcInfo;
 615   STARTUPINFO siStartInfo;
 616   DWORD err;
 617
 618   /* Create a pipe for the child's STDOUT. */
 619   if (! WinPipe(&hChildStdoutRd, &hChildStdoutWr)) return GetLastError();
 620
 621   /* Create a pipe for the child's STDIN. */
 622   if (! WinPipe(&hChildStdinRd, &hChildStdinWr)) return GetLastError();
 623
 624   SetCurrentDirectory(dir); // go to engine directory
 625
 626   /* Now create the child process. */
 627   siStartInfo.cb = sizeof(STARTUPINFO);
 628   siStartInfo.lpReserved = NULL;
 629   siStartInfo.lpDesktop = NULL;
 630   siStartInfo.lpTitle = NULL;
 631   siStartInfo.dwFlags = STARTF_USESTDHANDLES;
 632   siStartInfo.cbReserved2 = 0;
 633   siStartInfo.lpReserved2 = NULL;
 634   siStartInfo.hStdInput = hChildStdinRd;
 635   siStartInfo.hStdOutput = hChildStdoutWr;
 636   siStartInfo.hStdError = hChildStdoutWr;
 637
 638   fSuccess = CreateProcess(NULL,
 639                            cmdLine,        /* command line */
 640                            NULL,           /* process security attributes */
 641                            NULL,           /* primary thread security attrs */
 642                            TRUE,           /* handles are inherited */
 643                            DETACHED_PROCESS|CREATE_NEW_PROCESS_GROUP,
 644                            NULL,           /* use parent's environment */
 645                            NULL,
 646                            &siStartInfo, /* STARTUPINFO pointer */
 647                            &piProcInfo); /* receives PROCESS_INFORMATION */
 648
 649   if (! fSuccess) return GetLastError();
 650
 651 //  if (0) { // in the future we could trigger this by an argument
 652 //    SetPriorityClass(piProcInfo.hProcess, GetWin32Priority(appData.niceEngines));
 653 //  }
 654
 655   /* Close the handles we don't need in the parent */
 656   CloseHandle(piProcInfo.hThread);
 657   CloseHandle(hChildStdinRd);
 658   CloseHandle(hChildStdoutWr);
 659
 660   process = piProcInfo.hProcess;
 661   pid = piProcInfo.dwProcessId;
 662   fromE = (FILE*) _fdopen( _open_osfhandle((long)hChildStdoutRd, _O_TEXT|_O_RDONLY), "r");
 663   toE   = (FILE*) _fdopen( _open_osfhandle((long)hChildStdinWr, _O_WRONLY), "w");
 664 #else
 665     char *argv[10], *p, buf[200];
 666     int i, toEngine[2], fromEngine[2];
 667
 668     if (dir && dir[0] && chdir(dir)) { perror(dir); exit(1); }
 669     pipe(toEngine); pipe(fromEngine); // create two pipes
 670
 671     if ((pid = fork()) == 0) { // Child
 672         dup2(toEngine[0], 0);   close(toEngine[0]);   close(toEngine[1]);   // stdin from toE pipe
 673         dup2(fromEngine[1], 1); close(fromEngine[0]); close(fromEngine[1]); // stdout into fromE pipe
 674         dup2(1, fileno(stderr)); // stderr into frome pipe
 675
 676         strcpy(buf, cmdLine); p = buf;
 677         for (i=0;;) { argv[i++] = p; p = strchr(p, ' '); if (p == NULL) break; *p++ = 0; }
 678         argv[i] = NULL;
 679         execvp(argv[0], argv); // startup engine
 680
 681         perror(argv[0]); exit(1); // could not start engine; quit.
 682     }
 683     signal(SIGPIPE, SIG_IGN);
 684     close(toEngine[0]); close(fromEngine[1]); // close engine ends of pipes in adapter
 685
 686     fromE = (FILE*) fdopen(fromEngine[0], "r"); // make into high-level I/O
 687     toE   = (FILE*) fdopen(toEngine[1], "w");
 688 #endif
 689   return NO_ERROR;
 690 }
 691
 692 main(int argc, char **argv)
 693 {
 694         char *dir = NULL, *p, *q; int e;
 695
 696         if(argc == 2 && !strcmp(argv[1], "-v")) { printf("UCI2WB " VERSION " by H.G.Muller\n"); exit(0); }
 697         if(argc > 1 && !strcmp(argv[1], "debug")) { debug = 1; argc--; argv++; }
 698         if(argc > 1 && !strcmp(argv[1], "-var")) { strcpy(varList+1, argv[2]); *varList = ','; argc-=2; argv+=2; }
 699         if(argc > 1 && argv[1][0] == '-') { sc = argv[1][1]; argc--; argv++; }
 700         if(argc < 2) { printf("usage is: U%cI2WB [debug] [-s] <engine.exe> [<engine directory>]\n", sc-32); exit(-1); }
 701         if(argc > 2) dir = argv[2];
 702         if(argc > 3) strncpy(suffix, argv[3], 80);
 703
 704         if(sc == 'x') nameWord = valueWord = bTime = "", wTime = "opp", bInc = "increment", wInc = "oppincrement", unit = 1000; // switch to UCCI keywords
 705         else if(sc == 'f' ) frc = -1, sc = 'c';   // UCI for unannounced Chess960
 706         else if(sc == 'n') sc = 'c'; // UCI for normal Chess
 707
 708         // spawn engine proc
 709         if(StartEngine(binary = argv[1], dir) != NO_ERROR) { perror(argv[1]), exit(-1); }
 710
 711         Sync(INIT);
 712
 713         // create separate thread to handle engine->GUI traffic
 714 #ifdef WIN32
 715         CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) Engine2GUI, (LPVOID) NULL, 0, &thread_id);
 716 #else
 717         { pthread_t t; signal(SIGINT, SIG_IGN); signal(SIGTERM, SIG_IGN); pthread_create(&t, NULL, Engine2GUI, NULL); }
 718 #endif
 719
 720         // handle GUI->engine traffic in original thread
 721         GUI2Engine();
 722 }