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 "4.1"
  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    void Bury(int s) { if(WaitForSingleObject(process, 1000*s+50) != WAIT_OBJECT_0) TerminateProcess(process, 0); }
  22 #else
  23 #  include <pthread.h>
  24 #  include <signal.h>
  25 #  include <unistd.h>
  26 #  define NO_ERROR 0
  27 #  include <sys/time.h>
  28 #  include <sys/wait.h>
  29    int GetTickCount() // with thanks to Tord
  30    { struct timeval t; gettimeofday(&t, NULL); return t.tv_sec*1000 + t.tv_usec/1000; }
  31 //#  include <unistd.h>
  32    int Sleep(int msec) { return usleep(1000*msec); }
  33    int pid; void Bury(int msec) { Sleep(msec+50); if(waitpid(-1, NULL, WNOHANG) <= 0) kill(pid, SIGKILL); }
  34 #endif
  35 #include <fcntl.h>
  36 #include <string.h>
  37 #include <ctype.h>
  38
  39 // Set VARIANTS for in WinBoard variant feature. (With -s option this will always be reset to use "shogi".)
  40 #define VARIANTS ",normal,xiangqi"
  41 #define STDVARS "chess,chess960,crazyhouse,3check,giveaway,suicide,losers,atomic,seirawan,shogi,xiangqi"
  42 #define EGT ",gaviotaTbPath,syzygyPath,nalimovPath,robbotripleBaseDirectory,robbototalBaseDirectory,bitbases path,"
  43
  44 #define DPRINT if(debug) printf
  45 #define EPRINT(X) { char f[999]; sprintf X; DPRINT("%s", f); fprintf(toE, "%s", f + 2*(*f == '#')); /* strip optional # prefix */ }
  46
  47 #define WHITE 0
  48 #define BLACK 1
  49 #define NONE  2
  50 #define ANALYZE 3
  51
  52 char move[2000][10], iniPos[256], hashOpt[20], suspended, ponder, post, hasHash, c, sc='c', suffix[81], varOpt, searching, *binary;
  53 int mps, tc, inc, sTime, depth, myTime, hisTime, stm, computer = NONE, memory, oldMem=0, cores, moveNr, lastDepth, lastScore, startTime, debug, flob;
  54 int statDepth, statScore, statNodes, statTime, currNr, size, collect, nr, sm, inex, on[500], frc, byo = -1, namOpt, comp;
  55 char currMove[20], moveMap[500][10], /* for analyze mode */ canPonder[20], threadOpt[20], varList[8000], anaOpt[20], checkOptions[8192] = "Ponder";
  56 char pvs[99][999], board[100];  // XQ board for UCCI
  57 char *nameWord = "name ", *valueWord = "value ", *wTime = "w", *bTime = "b", *wInc = "winc", *bInc = "binc", newGame; // keywords that differ in UCCI
  58 int unit = 1, drawOffer, scores[99], mpvSP, maxDepth, ponderAlways, newCnt, priority, killDelay;
  59
  60 FILE *toE, *fromE, *fromF;
  61
  62 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; }
  63
  64 #ifdef WIN32
  65 WinPipe(HANDLE *hRd, HANDLE *hWr)
  66 {
  67   SECURITY_ATTRIBUTES saAttr;
  68
  69   /* Set the bInheritHandle flag so pipe handles are inherited. */
  70   saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
  71   saAttr.bInheritHandle = TRUE;
  72   saAttr.lpSecurityDescriptor = NULL;
  73
  74   /* Create a pipe */
  75   return CreatePipe(hRd, hWr, &saAttr, 0);
  76 }
  77 #endif
  78
  79 #define INIT 0
  80 #define WAKEUP 1
  81 #define PAUSE 2
  82
  83 void
  84 Sync (int action)
  85 {
  86 #ifdef WIN32
  87         static HANDLE hWr, hRd; DWORD d; char c;
  88         switch(action) {
  89             case INIT:   WinPipe(&hRd, &hWr); break;
  90             case WAKEUP: WriteFile(hWr, "\n", 1, &d, NULL); break;
  91             case PAUSE:  ReadFile(hRd, &c, 1, &d, NULL);
  92         }
  93 #else
  94         static int syncPipe[2], res;    char c;
  95         switch(action) {
  96             case INIT:   res = pipe(syncPipe); break;
  97             case WAKEUP: res = write(syncPipe[1], "\n", 1); break;
  98             case PAUSE:  res = read(syncPipe[0], &c, 1);
  99         }
 100         if(res < 0) printf("tellusererror UCI2WB: bad sync pipe\n"), exit(0);
 101 #endif
 102 }
 103
 104 void
 105 FromFEN(char *fen)
 106 {       int i=0;
 107         while(*fen) {
 108             char c = *fen++;
 109             if(c >= 'A') board[i++] = c; else
 110             if(c == '/') i++; else
 111             if(c == ' ') break; else
 112             while(c-- > '0' && i < 99) board[i++] = 0;
 113             if(i >= 99) break;
 114         }
 115 }
 116
 117 char *
 118 ToFEN(int stm)
 119 {
 120         int i, n=0; static char fen[200]; char *p = fen;
 121         for(i=0; i<99; i++) {
 122             char c = board[i];
 123             if(c >= 'A')  { if(n) *p++ = '0' + n; n = 0;  *p++ = c; } else n ++;
 124             if(i%10 == 8) { if(n) *p++ = '0' + n; n = -1; *p++ = '/'; }
 125         }
 126         sprintf(p-1, " %c - - 0 1", stm);
 127         return fen;
 128 }
 129
 130 int
 131 Sqr(char *m, int j)
 132 {
 133         int n = m[j] - 'a' + 10*('9' - m[j+1]);
 134         if(n < 0) n = 0; else if(n > 99) n = 99; return n;
 135 }
 136
 137 int
 138 Play(int nr)
 139 {
 140         int i, last = -1;
 141         FromFEN(iniPos + 4); // in XQ iniPos always has just "fen " prefix
 142         for(i=0; i<nr; i++) {
 143             int from=Sqr(move[i], 0), to=Sqr(move[i], 2);
 144             if(board[to] || (board[from]|32)  == 'p' && move[i][1] != move[i][3]) last = i;
 145             board[to] = board[from]; board[from] = 0;
 146         }
 147         return last;
 148 }
 149
 150 void
 151 StartSearch(char *ponder)
 152 {       // send the 'go' command to engine. Suffix by ponder.
 153         int x = (ponder[0] != 0);                   // during ponder stm is the opponent
 154         int black = (stm == BLACK ^ x ^ sc == 's'); // set if our color is what the engine calls black
 155         int nr = moveNr + x;                        // we ponder for one move ahead!
 156         int t = (flob ? inc + myTime/40 : 1000*byo*(byo>0)); // byoyomi time
 157         if(sc == 'x') black = 1; else drawOffer = 0;// in UCCI 'black' refers to us and 'white' to opponent
 158         if(!x && drawOffer) ponder = " draw", drawOffer = 0; //pass draw offer only when not pondering
 159         EPRINT((f, "# go%s %stime %d %stime %d", ponder, bTime, (black ? myTime : hisTime) - t, wTime, (!black ? myTime : hisTime) - t))
 160         if(sTime > 0) EPRINT((f, " movetime %d", sTime)) else
 161         if(mps) EPRINT((f, " movestogo %d", mps*(nr/(2*mps)+1)-nr/2))
 162         if(flob || byo >= 0) sprintf(suffix, " byoyomi %d", t); // for engines running purely on byoyomi
 163         if(inc && !*suffix) EPRINT((f, " %s %d %s %d", wInc, inc, bInc, inc))
 164         if(depth > 0) EPRINT((f, " depth %d", depth))
 165         if(*suffix) EPRINT((f, suffix, inc))
 166         EPRINT((f, "\n")); maxDepth = mpvSP = 0;
 167 }
 168
 169 void
 170 StopSearch(int discard)
 171 {
 172         if(!searching) return;
 173         if(discard) searching = 0; // this causes bestmove to be ignored
 174         EPRINT((f, "# stop\n")) fflush(toE); // note: 'pondering' remains set until engine acknowledges 'stop' with 'bestmove'
 175 }
 176
 177 void
 178 LoadPos(int moveNr)
 179 {
 180         int j, lastCapt = 0; char *pos = iniPos, buf[200], stm;
 181         if(sc == 'x') { // UCCI: send only reversible moves
 182             lastCapt = Play(moveNr); // find last capture (returns -1 if none!)
 183             Play(++lastCapt);        // reconstruct board after last capture
 184             stm = (!strstr(iniPos+4, " b ") ^ lastCapt & 1 ? 'w' :  'b');
 185             sprintf(buf, "position fen %s", ToFEN(stm)); pos = buf; // send it as FEN (with "position" in UCCI!)
 186         }
 187         EPRINT((f, "# %s moves", pos))
 188         for(j=lastCapt; j<moveNr; j++) EPRINT((f, " %s", move[j]))
 189         EPRINT((f, "\n"))
 190 }
 191
 192 void
 193 StartPonder(int moveNr)
 194 {
 195         if(!move[moveNr][0]) return; // no ponder move
 196         LoadPos(moveNr+1);
 197         searching = 1; lastDepth = 1;
 198         DPRINT("# ponder on %s\n", move[moveNr]);
 199         StartSearch(" ponder");
 200 }
 201
 202 void
 203 Analyze(char *val)
 204 {
 205     if(*anaOpt) EPRINT((f, "# setoption %s%s %s%s\n", nameWord, anaOpt, valueWord, val));
 206 }
 207
 208 char *Convert(char *pv)
 209 {   // convert Shogi coordinates to WB
 210     char *p, *q, c;
 211     static char buf[10000];
 212     if(sc != 's') return pv;
 213     p = pv; q = buf;
 214     while(c = *p++) {
 215         if(c >= '0' && c <= '9' || c >= 'a' && c <= 'z') *q++ = 'a'+'0'+size - c; else *q++ = c;
 216     }
 217     *q++ = 0;
 218     return buf;
 219 }
 220
 221 void
 222 Move4GUI(char *m)
 223 {
 224     if(sc == 's') {
 225       // convert USI move to WB format
 226       m[2] = 'a'+'0'+size - m[2];
 227       m[3] = 'a'+'0'+size - m[3];
 228       if(m[1] == '*') { // drop
 229         m[1] = '@';
 230       } else {
 231         m[0] = 'a'+'0'+size - m[0];
 232         m[1] = 'a'+'0'+size - m[1];
 233         if((stm == WHITE ? (m[1]>'0'+size-size/3 || m[3]>'0'+size-size/3)
 234                                 : (m[1] <= '0'+size/3 || m[3] <= '0'+size/3)) && m[4] != '+')
 235              m[4] = '=', m[5] = 0;
 236       }
 237     }
 238 }
 239
 240 int
 241 ReadLine (FILE *f, char *line)
 242 {
 243     int x, i = 0;
 244     while((x = fgetc(f)) != EOF && (line[i] = x) != '\n') i++; line[++i] = 0;
 245     return (x != EOF);
 246 }
 247
 248 void
 249 HandleEngineOutput()
 250 {
 251     char line[1024], command[256]; static char egts[999];
 252
 253     while(1) {
 254         int i=0; char *p, dummy;
 255
 256         fflush(stdout); fflush(toE);
 257         if(fromF && !ReadLine(fromF, line))  fromF = 0, printf("# end fake\n");
 258         if(!fromF && !ReadLine(fromE, line)) printf("tellusererror UCI2WB: %s died on me\n", binary), exit(0);
 259         DPRINT("# engine said: %s", line), fflush(stdout);
 260         if(sscanf(line, "%s", command) != 1) continue;
 261         if(!strcmp(command, "bestmove")) {
 262             if(searching == 1) { searching = 0; printf("%d 0 0 0 UCI violation! Engine moves during ponder\n", lastDepth+1); return; } // ignore ponder search
 263             else if(searching != 3) { searching = 0; return; } // ponder miss or analysis result; ignore.
 264             // move was a move to be played
 265             if(p = strstr(line+8, " draw")) *p = 0, printf("offer draw\n"); // UCCI
 266             if(strstr(line+9, "resign")) { printf("resign\n"); computer = NONE; }
 267             if(strstr(line+9, "win")) { printf("%s {claim}\n", stm== WHITE ? "1-0" :"0-1"); computer = NONE; } // USI
 268             if(strstr(line+9, "(none)") || strstr(line+9, "null") ||
 269                strstr(line+9, "0000")) { printf("%s\n", lastScore < -99999 ? "resign" : "1/2-1/2 {stalemate}"); computer = NONE; }
 270             sscanf(line, "bestmove %s", move[moveNr++]);
 271             myTime -= (GetTickCount() - startTime)*1.02 - inc; // update own clock, so we can give correct wtime, btime with ponder
 272             if(mps && ((moveNr+1)/2) % mps == 0) myTime += tc; if(sTime) myTime = sTime; // new session or move starts
 273             stm = WHITE+BLACK - stm; searching = 0;
 274             // first start a new ponder search, if pondering is on and we have a move to ponder on
 275             if(p = strstr(line+9, "ponder")) {
 276               sscanf(p+7, "%s", move[moveNr]);
 277               if(computer != NONE && ponder) StartPonder(moveNr);
 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(lastScore == 100001 && iniPos[0] != 'f') { printf("%s {mate}\n", stm == BLACK ? "1-0" : "0-1"); computer = NONE; }
 284             fflush(stdout); return;
 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)) {
 292                     int files = 8, ranks = 8, hand = 0; char parent[80];
 293                     if(p = strstr(line+18, " files ")) sscanf(p+7, "%d", &files);
 294                     if(p = strstr(line+18, " ranks ")) sscanf(p+7, "%d", &ranks);
 295                     if(p = strstr(line+18, " pocket ")) sscanf(p+8, "%d", &hand);
 296                     if(p = strstr(line+18, " template ")) sscanf(p+10, "%s", parent); else strcpy(parent, "fairy");
 297                     if(p = strstr(line+18, " startpos "))
 298                         printf("setup (-) %dx%d+%d_%s %s", files, ranks, hand, parent, p+10);
 299                 }
 300                 continue;
 301             }
 302             if(!post) continue;
 303             if(sscanf(line+5, "string %c", &dummy) == 1) printf("%d 0 0 0 %s", lastDepth, line+12); else {
 304                 if(p = strstr(line+4, " depth "))      sscanf(p+7, "%d", &d), statDepth = d;
 305                 if(p = strstr(line+4, " score cp "))   sscanf(p+10, "%d", &s), statScore = s; else
 306                 if(p = strstr(line+4, " score mate ")) sscanf(p+12, "%d", &s), s += s>0 ? 100000 : -100000, statScore = s; else
 307                 if(p = strstr(line+4, " score "))      sscanf(p+7, "%d", &s), statScore = s;
 308                 if(p = strstr(line+4, " nodes "))      sscanf(p+7, "%d", &n), statNodes = n;
 309                 if(p = strstr(line+4, " time "))       sscanf(p+6, "%d", &t), t /= 10, statTime = t;
 310                 if(pv = strstr(line+4, " pv ")) { // convert PV info to WB thinking output
 311                   if(d > maxDepth) maxDepth = d, mpvSP = 0; else if(d < maxDepth) continue; // ignore depth regressions
 312                   if(p = strstr(line+4, " upperbound ")) strcat(p, "?\n"); else
 313                   if(p = strstr(line+4, " lowerbound ")) strcat(p, "!\n");
 314                   for(i=0; i<mpvSP; i++) if(s == scores[i] && !strcmp(pvs[i], pv+4)) break; // check if duplicat
 315                   if(i >= mpvSP) strncpy(pvs[mpvSP], pv+4, 998), scores[mpvSP++] = s,       // emit as thinking output if not
 316                     printf("%3d  %6d %6d %10d %s", lastDepth=d, lastScore=s, t, n, Convert(pv+4));
 317                 } else if(s == -100000) lastScore = s; // when checkmated score is valid even without PV (which might not come)
 318             }
 319             if(collect && (pv = strstr(line+4, " currmove "))) {
 320                 sscanf(pv+10,"%s", currMove);
 321                 if(p = strstr(line+4, " currmovenumber ")) {
 322                     n = currNr = atoi(p+16);
 323                     if(collect == 1 && n != 1) continue; // wait for move 1
 324                     if(collect + (n == 1) > 2) { // done collecting
 325                         if(inex && collect == 2) printf("%d 0 0 0 OK to exclude\n", lastDepth);
 326                         collect = 3; continue;
 327                     }
 328                     collect = 2; on[nr=n] = 1; strcpy(moveMap[n], currMove); continue; // store move
 329                 }
 330             }
 331         }
 332         else if(!strcmp(command, "option")) { // USI option: extract data fields
 333             char name[80], type[80], buf[1024], val[256], *q;
 334             int min=0, max=1e9; *val = 0;
 335             if(p = strstr(line+6, " type ")) sscanf(p+1, "type %s", type), *p = '\n';
 336             if(p = strstr(line+6, " min "))  sscanf(p+1, "min %d", &min), *p = '\n';
 337             if(p = strstr(line+6, " max "))  sscanf(p+1, "max %d", &max), *p = '\n';
 338             if(p = strstr(line+6, " default "))  sscanf(p+1, "default %[^\n]*", val), *p = '\n';
 339             if(!(p = strstr(line+6, " name "))) p = line+1; sscanf(p+6, "%[^\n]", name); // 'name' is omitted in UCCI
 340             if(!strcasecmp(name, "UCI_Chess960")) { frc=2; continue; }
 341             if(!strcasecmp(name, "UCI_Variant")) { if(p = strstr(line+6, " var ")) strcpy(varList, p); varOpt = 1; continue; }
 342             if(!strcasecmp(name, "UCI_Opponent")) { namOpt = 1; continue; }
 343             if(!strcasecmp(name+2, "I_AnalyseMode")) { strcpy(anaOpt, name); continue; }
 344             if(frc< 0 && (strstr(name, "960") || strcasestr(name, "frc")) && !strcmp(type, "check")) {
 345                 EPRINT((f, "# setoption name %s value true\n", name)) strcpy(val, "true"); // set non-standard suspected FRC options
 346             }
 347             if(!strcasecmp(name, "Threads")) { strcpy(threadOpt, name); continue; }
 348             if(!strcasecmp(name, "Ponder") || !strcasecmp(name, "USI_Ponder")) { strcpy(canPonder, name); continue; }
 349             if(!strcasecmp(name, "Hash") || !strcasecmp(name, "USI_Hash") || !strcasecmp(name, "hashsize")) {
 350                 memory = oldMem = atoi(val); hasHash = 1;
 351                 strcpy(hashOpt, name);
 352                 continue;
 353             }
 354             if(!strcasecmp(name, "newgame") && !strcmp(type, "button")) { newGame++; continue; }
 355             if(!strcasecmp(name, "usemillisec")) { unit = (!strcmp(val, "false") ? 2 : 1); continue; }
 356             sprintf(buf, ",%s,", name); if(p = strcasestr(EGT, buf)) { // collect EGT formats
 357                 strcpy(buf, p); for(p=buf; *++p >='a';){} if(*p == ' ') strcpy(buf, ",scorpio"); *p = 0; strcat(egts, buf); continue; // clip at first non-lower-case
 358             }
 359             // pass on engine-defined option as WB option feature
 360             if(!strcmp(type, "filename")) type[4] = 0;
 361             else if(sc == 'c' && !strcmp(type, "string")) { // in UCI try to guess which strings are file or directory names
 362                 if(strcasestr(name, "file")) strcpy(type, "file"); else
 363                 if(strcasestr(name, "path") || strcasestr(name, "directory") || strcasestr(name, "folder")) strcpy(type, "path");
 364             }
 365             sprintf(buf, "feature option=\"%s -%s", name, type); q = buf + strlen(buf);
 366             if(     !strcmp(type, "file")
 367                  || !strcmp(type, "string")) sprintf(q, " %s\"\n", val);
 368             else if(!strcmp(type, "spin"))   sprintf(q, " %d %d %d\"\n", atoi(val), min, max);
 369             else if(!strcmp(type, "check"))  sprintf(q, " %d\"\n", strcmp(val, "true") ? 0 : 1), strcat(checkOptions, name);
 370             else if(!strcmp(type, "button")) sprintf(q, "\"\n");
 371             else if(!strcmp(type, "combo")) {
 372                 if(p = strstr(line+6, " default "))  sscanf(p+1, "default %s", type); // current setting
 373                 min = 0; p = line+6;
 374                 while(p = strstr(p, " var ")) {
 375                     sscanf(p += 5, "%s", val); // next choice
 376                     sprintf(buf + strlen(buf), "%s%s%s", min++ ? " /// " : " ", strcmp(type, val) ? "" : "*", val);
 377                 }
 378                 strcat(q, "\"\n");
 379
 380             }
 381             else buf[0] = 0; // ignore unrecognized option types
 382             if(buf[0]) printf("%s", buf);
 383         }
 384         else if(!strcmp(command, "id")) {
 385             static char name[256], version[256];
 386             if(sscanf(line, "id name %[^\n]", name) == 1) printf("feature myname=\"%s (U%cI2WB)\"\n", name, sc-32);
 387             if(sscanf(line, "id version %[^\n]", version) == 1 && *name) printf("feature myname=\"%s %s (U%cI2WB)\"\n", name, version, sc-32);
 388         }
 389         else if(!strcmp(command, "readyok")) return; // resume processing of GUI commands
 390         else if(sc == 'x'&& !strcmp(command, "ucciok") || sscanf(command, "u%ciok", &c)==1 && c==sc) {
 391             char *p = varList, *q = p;
 392             while(*q && *q != '\n')  if(!strncmp(q, " var ", 5)) *p++ = ',', q +=5; // replace var keywords by commas
 393                                 else if(!strncmp(q-1, " chess ", 7)) strcpy(p, "normal"), p += 6, q += 5; // 'chess' is called 'normal' in CECP
 394                                 else *p++ = *q++; // copy other variant names unmodified
 395             *p = 0;
 396             if(frc) sprintf(p, ",normal,fischerandom"), printf("feature oocastle=%d\n", frc<0); // unannounced FRC uses O-O castling
 397             if(!*varList) strcpy(varList, sc=='s' ? ",shogi,5x5+5_shogi" : VARIANTS); // without clue guess liberally
 398             printf("feature variants=\"%s\"\n", varList+1); // from UCI_Variant combo and/or UCI_Chess960 check options
 399             if(*egts) printf("feature egt=\"%s\"\n", egts+1);
 400             printf("feature smp=1 memory=%d done=1\n", hasHash);
 401             if(unit == 2) { unit = 1; EPRINT((f, "# setoption usemillisec true\n")) }
 402             fflush(stdout); return; // done with options
 403         }
 404     }
 405 }
 406
 407 void
 408 Move4Engine(char *m)
 409 {
 410     if(sc == 's') {
 411       // convert input move to USI format
 412       if(m[1] == '@') { // drop
 413         m[1] = '*';
 414       } else {
 415         m[0] = 'a'+'0'+size - m[0];
 416         m[1] = 'a'+'0'+size - m[1];
 417       }
 418       m[2] = 'a'+'0'+size - m[2];
 419       m[3] = 'a'+'0'+size - m[3];
 420       if(m[4] == '=') m[4] = 0; // no '=' in USI format!
 421       else if(m[4]) m[4] = '+'; // cater to WB 4.4 bug :-(
 422     }
 423 }
 424
 425 void DoCommand ();
 426 char mySide;
 427 volatile char queue[10000], *qStart, *qEnd;
 428
 429 void
 430 LaunchSearch()
 431 {
 432     int i;
 433
 434     if(suspended || searching) return;
 435
 436         if(computer == stm || computer == ANALYZE && sm != 1) {
 437             DPRINT("# start search\n");
 438             LoadPos(moveNr); fflush(stdout); // load position
 439             // and set engine thinking (note USI swaps colors!)
 440             startTime = GetTickCount(); mySide = stm; // remember side we last played for
 441             if(computer == ANALYZE) {
 442                 EPRINT((f, "# go infinite")); maxDepth = mpvSP = 0;
 443                 if(sm & 1) { // some moves are disabled
 444                     EPRINT((f, " searchmoves"))
 445                     for(i=1; i<nr; i++) if(on[i]) EPRINT((f, " %s", moveMap[i]))
 446                 }
 447                 EPRINT((f, "\n")) searching = 2; // suppresses spurious commands during analysis starting new searches
 448             } else searching = 3, StartSearch(""); // request suspending of input processing while thinking
 449         } else if(ponderAlways && computer == NONE) move[moveNr][0] = 0, StartPonder(moveNr-1);
 450         else if(BLACK+WHITE-stm == computer && ponder && moveNr) StartPonder(moveNr);
 451 }
 452
 453 void
 454 GUI2Engine()
 455 {
 456     char line[256], command[256], *p;
 457
 458     while(1) {
 459         int difficult;
 460
 461        for(difficult=0; !difficult; ) { // read and handle commands that can (or must) be handled during thinking
 462         fflush(toE); fflush(stdout);
 463         if(!ReadLine(stdin, line)) printf("# EOF\n"), sprintf(line, "quit -1\n");
 464         if(!sscanf(line, "%s", command)) return;
 465         if(!strcmp(command, "usermove")) { difficult--; break; } // for efficiency during game play, moves, time & otim are tried first
 466         else if(!strcmp(command, "time"))   sscanf(line+4, "%d", &myTime),  myTime  = (10*myTime)/unit;
 467         else if(!strcmp(command, "otim"))   sscanf(line+4, "%d", &hisTime), hisTime = (10*hisTime)/unit;
 468         else if(!strcmp(command, "offer")) drawOffer = 1; // backlogged anyway, so this can be done instantly
 469         else if(!strcmp(command, "post"))  post = 1;
 470         else if(!strcmp(command, "nopost"))post = 0;
 471         else if(!strcmp(command, ".")) {
 472             printf("stat01: %d %d %d %d %d %s\n", statTime, statNodes, statDepth, nr-currNr, nr, currMove);
 473         }
 474         else if(!strcmp(command, "pause")) {
 475             if(computer == stm) myTime -= GetTickCount() - startTime;
 476             suspended = 1 + (searching == 1); // remember if we were pondering, and stop search ignoring bestmove
 477             StopSearch(1);
 478         }
 479         else if(!strcmp(command, "xboard")) ;
 480         else if(!strcmp(command, "random")) ;
 481         else if(!strcmp(command, "accepted")) ;
 482         else if(!strcmp(command, "rejected")) ;
 483         else if(!strcmp(command, "book")) ;
 484         else if(!strcmp(command, "ics")) ;
 485         else if(!strcmp(command, "hint")) ;
 486         else if(!strcmp(command, "computer")) comp = 1;
 487         else { //convert easy & hard to "option" after treating their effect on the adapter
 488           if(!strcmp(command, "easy")) {
 489             if(*canPonder) ponder = 0, sprintf(command, "option"), sprintf(line, "option %s=0\n", canPonder); else continue;
 490           }
 491           else if(!strcmp(command, "hard")) {
 492             if(*canPonder) ponder = 1, sprintf(command, "option"), sprintf(line, "option %s=1\n", canPonder); else continue;
 493           }
 494           if(!strcmp(command, "option")) {
 495             if(sscanf(line+7, "UCI2WB debug output=%d", &debug) == 1) ; else
 496             if(sscanf(line+7, "ponder always=%d", &ponderAlways) == 1) ; else
 497             if(sscanf(line+7, "Floating Byoyomi=%d", &flob) == 1) ; else
 498             if(sscanf(line+7, "Byoyomi=%d", &byo) == 1) ; else
 499             difficult = 1;
 500           }
 501           else difficult = 1; // difficult command; terminate loop for easy ones
 502         }
 503        } // next command
 504
 505         // some commands that should never come during thinking can be safely processed here
 506         if(difficult < 0) { // used as kludge to signal "usermove" was already matched
 507             sscanf(line, "usermove %s", command); // strips off linefeed
 508             Move4Engine(command);
 509             collect = (computer == ANALYZE); sm = 0;
 510             // when pondering we either continue the ponder search as normal search, or abort it
 511             if(searching == 1 && !strcmp(command, move[moveNr])) { // ponder hit
 512                 char *draw = drawOffer ? " draw" : ""; drawOffer = 0;
 513                 stm = WHITE+BLACK - stm;         // for acceptance of ponder move (can be safely done out of sync)
 514                 searching = 3; moveNr++; startTime = GetTickCount(); // clock starts running now
 515                 EPRINT((f, "# ponderhit%s\n", draw)) fflush(toE); fflush(stdout);
 516             } else {
 517                 if(searching) StopSearch(1);     // ponder miss or analysis, as moves won't arrive during thinking
 518                 p = line+7; while(qEnd < queue+10000 && (*qEnd++ = *p++) != '\n') {}
 519                 Sync(WAKEUP);                    // queue move for adding it to game (and toggle stm)
 520             }
 521         } else
 522         if(!strcmp(command, "resume")) {
 523             if(suspended == 2) StartPonder(moveNr); // restart interrupted ponder search
 524             suspended = 0;  *qEnd++ = '\n'; Sync(WAKEUP); // causes search to start in normal way if on move or analyzing
 525         } else
 526       {
 527         DPRINT("# queue '%s', searching=%d\n", command, searching);
 528         if(searching == 3) { // command arrived during thinking; order abort for 'instant commands'
 529             if(!strcmp(command, "?") || !strcmp(command, "quit") ||
 530                !strcmp(command, "force") || !strcmp(command, "result")) StopSearch(0);
 531         } else StopSearch(1); // always abort pondering or analysis
 532
 533         // queue command for execution by engine thread
 534         if(qStart == qEnd) qStart = qEnd = queue;
 535         p = line; while(qEnd < queue+10000 && (*qEnd++ = *p++) != '\n') {}
 536         Sync(WAKEUP);
 537         // when 'stop' doesn't catch engine's attention in reasonable time, so the GUI might kill us:
 538         if(!strcmp(command, "quit")) { Bury(killDelay); exit(0); } // kill the engine and exit
 539       }
 540     }
 541 }
 542
 543 void
 544 DoCommand ()
 545 {
 546     char line[1024], command[256], *p, *q, *r, type[99];
 547     int i;
 548
 549     p=line; while(qStart < qEnd && (*p++ = *qStart++) != '\n') {} *p = 0;
 550     sscanf(line, "%s %s", command, type); DPRINT("# command %s\n", command), fflush(stdout);
 551
 552         if(!strcmp(command, "new")) {
 553             computer = BLACK; moveNr = 0; depth = -1; move[0][0] = 0;
 554             stm = WHITE; strcpy(iniPos, "position startpos"); frc &= ~1;
 555             if(newCnt++) return; // prevent a 2nd 'isready' due to reuse=0-violating 'new' preceding 'quit'
 556             if(memory != oldMem && hasHash) EPRINT((f, "# setoption %s%s %s%d\n", nameWord, hashOpt, valueWord, memory))
 557             oldMem = memory;
 558             // we can set other options here
 559             if(varOpt && strstr(varList, ",normal")) EPRINT((f, "# setoption name UCI_Variant value chess\n"))
 560             EPRINT((f, "# isready\n")) fflush(toE);
 561             HandleEngineOutput(); // wait for readyok
 562             if(sc == 'x') { if(newGame) EPRINT((f, "# setoption newgame\n")) } else // optional in UCCI
 563             EPRINT((f, "# u%cinewgame\n", sc)) fflush(toE);
 564         }
 565         else if(!strcmp(command, "e")) { strcpy(move[moveNr++], type); stm ^= WHITE|BLACK; return; }
 566         else if(!strcmp(command, "option")) {
 567             char *p;
 568             if(p = strchr(line, '=')) {
 569                 *p++ = 0;
 570                 if(strstr(checkOptions, line+7)) sprintf(p, "%s\n", atoi(p) ? "true" : "false");
 571                 EPRINT((f, "# setoption %s%s %s%s", nameWord, line+7, valueWord, p));
 572             } else EPRINT((f, "# setoption %s%s\n", nameWord, line+7));
 573         }
 574         else if(!strcmp(command, "level")) {
 575             int sec = 0;
 576             if(sscanf(line, "level %d %d:%d %d", &mps, &tc, &sec, &inc) != 4)
 577                 sscanf(line, "level %d %d %d", &mps, &tc, &inc);
 578             tc = (60*tc + sec)*1000; inc *= 1000; sTime = 0; tc /= unit; inc /= unit;
 579         }
 580         else if(!strcmp(command, "protover")) {
 581             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");
 582             printf("feature option=\"UCI2WB debug output -check %d\"\n", debug);
 583             printf("feature option=\"ponder always -check %d\"\n", ponderAlways);
 584             if(sc == 's') printf("feature option=\"Floating Byoyomi -check %d\"\nfeature option=\"Byoyomi -spin %d -1 1000\"\n", flob, byo);
 585             EPRINT((f, sc == 'x' ? "# ucci\n" : "# u%ci\n", sc)) fflush(toE); // prompt UCI engine for options
 586             HandleEngineOutput(); // wait for uciok
 587         }
 588         else if(!strcmp(command, "setboard")) {
 589                 stm = (strstr(line+9, " b ") ? BLACK : WHITE);
 590                 if((p = strchr(line+9, '[')) && !varOpt) {
 591                     *p++ = 0; q = strchr(p, ']'); *q = 0; r = q + 4;
 592                     if(sc == 's') q[2] = 'w' + 'b' - q[2], strcpy(r=q+3, " 1\n"); // Shogi: reverse color
 593                     else r = strchr(strchr(q+4, ' ') + 1, ' '); // skip to second space (after e.p. square)
 594                     *r = 0; sprintf(command, "%s%s %s %s", line+9, q+1, p, r+1);
 595                 } else strcpy(command, line+9);
 596                 if(frc == -1 && (p = strchr(command, ' '))) strncpy(p+3, "KQkq", 4); // unannounced FRC
 597                 sprintf(iniPos, "%s%sfen %s", iniPos[0]=='p' ? "position " : "", sc=='s' ? "s" : "", command);
 598                 iniPos[strlen(iniPos)-1] = sm = 0; collect = (computer == ANALYZE);
 599         }
 600         else if(!strcmp(command, "variant")) {
 601                 if(varOpt) {
 602                     EPRINT((f, "# setoption name UCI_Variant value %sucinewgame\nisready\n", line+8))
 603                     fflush(toE); HandleEngineOutput(); // wait for readyok
 604                 }
 605                 if(!strcmp(line+8, "shogi\n")) size = 9, strcpy(iniPos, "position startpos");
 606                 if(!strcmp(line+8, "5x5+5_shogi\n")) size = 5, strcpy(iniPos, "position startpos");
 607                 if(!strcmp(line+8, "xiangqi\n")) strcpy(iniPos, "fen rnbakabnr/9/1c5c1/p1p1p1p1p/9/9/P1P1P1P1P/1C5C1/9/RNBAKABNR r");
 608                 if(!strcmp(line+8, "fischerandom\n")) { frc |= 1; if(frc > 0) EPRINT((f, "# setoption name UCI_Chess960 value true\n")) }
 609         }
 610         else if(!strcmp(command, "undo") && (i=1) || !strcmp(command, "remove") && (i=2)) {
 611             moveNr = moveNr > i ? moveNr - i : 0; collect = (computer == ANALYZE); sm = 0;
 612         }
 613         else if(!strcmp(command+2, "clude") && collect > 2) { // include or exclude
 614             int all = !strcmp(line+8, "all"), in = command[1] == 'n';
 615             inex = 1; line[strlen(line)-1] = sm = 0; // strip LF and clear sm flag
 616             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
 617         }
 618         else if(!strcmp(command, "analyze"))computer = ANALYZE, collect = 1, sm = 0, Analyze("true");
 619         else if(!strcmp(command, "exit"))   computer = NONE, Analyze("false");
 620         else if(!strcmp(command, "force"))  computer = NONE;
 621         else if(!strcmp(command, "go"))     computer = stm;
 622         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); }
 623         else if(!strcmp(command, "memory")) sscanf(line, "memory %d", &memory);
 624         else if(!strcmp(command, "cores")&& !!*threadOpt) { sscanf(line, "cores %d", &cores); EPRINT((f, "# setoption %s%s %s%d\n", nameWord, threadOpt, valueWord, cores)) }
 625         else if(!strcmp(command, "egtpath")){
 626             sscanf(line+8, "%s %[^\n]", type, command);
 627             if(p = strstr(EGT, type)) strcpy(type, p), p = strchr(type, ','), *p = 0; else strcpy(type, "bitbases path");
 628             EPRINT((f, "# setoption name %s value %s\n", type, command));
 629         }
 630         else if(!strcmp(command, "sd"))     sscanf(line, "sd %d", &depth);
 631         else if(!strcmp(command, "st"))     sscanf(line, "st %d", &sTime), sTime = 1000*sTime - 30, inc = 0, sTime /= unit;
 632         else if(!strcmp(command, "name"))   { if(namOpt) EPRINT((f, "# setoption name UCI_Opponent value none none %s %s", comp ? "computer" : "human", line+5)) }
 633         else if(!strcmp(command, "result")) {
 634             if(sc == 's') EPRINT((f, "# gameover %s\n", line[8] == '/' ? "draw" : (line[7] == '0') == mySide ? "win" : "lose"))
 635             computer = NONE;
 636         }
 637         else if(!strcmp(command, "quit"))   { EPRINT((f, "# quit\n")) fflush(toE); }
 638         else printf("Error (unknown command): %s\n", command);
 639
 640         fflush(stdout);
 641 }
 642
 643 void *
 644 Engine2GUI()
 645 {
 646     if(fromF = fopen("DefectiveEngineOptions.ini", "r")) printf("# fake engine input\n");
 647     while(1) {
 648         if(searching > 1) HandleEngineOutput();  // this could leave us (or fall through) pondering
 649         while(qStart == qEnd && searching) HandleEngineOutput(); // relay ponder output until command arrives
 650         Sync(PAUSE); // possibly wait for command silently if engine is idle
 651         DoCommand(); LaunchSearch();
 652     }
 653 }
 654
 655 int
 656 StartEngine(char *cmdLine, char *dir)
 657 {
 658 #ifdef WIN32
 659   HANDLE hChildStdinRd, hChildStdinWr,
 660     hChildStdoutRd, hChildStdoutWr;
 661   BOOL fSuccess;
 662   PROCESS_INFORMATION piProcInfo;
 663   STARTUPINFO siStartInfo;
 664   DWORD err;
 665
 666   /* Create a pipe for the child's STDOUT. */
 667   if (! WinPipe(&hChildStdoutRd, &hChildStdoutWr)) return GetLastError();
 668
 669   /* Create a pipe for the child's STDIN. */
 670   if (! WinPipe(&hChildStdinRd, &hChildStdinWr)) return GetLastError();
 671
 672   SetCurrentDirectory(dir); // go to engine directory
 673
 674   /* Now create the child process. */
 675   siStartInfo.cb = sizeof(STARTUPINFO);
 676   siStartInfo.lpReserved = NULL;
 677   siStartInfo.lpDesktop = NULL;
 678   siStartInfo.lpTitle = NULL;
 679   siStartInfo.dwFlags = STARTF_USESTDHANDLES;
 680   siStartInfo.cbReserved2 = 0;
 681   siStartInfo.lpReserved2 = NULL;
 682   siStartInfo.hStdInput = hChildStdinRd;
 683   siStartInfo.hStdOutput = hChildStdoutWr;
 684   siStartInfo.hStdError = hChildStdoutWr;
 685
 686   fSuccess = CreateProcess(NULL,
 687                            cmdLine,        /* command line */
 688                            NULL,           /* process security attributes */
 689                            NULL,           /* primary thread security attrs */
 690                            TRUE,           /* handles are inherited */
 691                            DETACHED_PROCESS|CREATE_NEW_PROCESS_GROUP,
 692                            NULL,           /* use parent's environment */
 693                            NULL,
 694                            &siStartInfo, /* STARTUPINFO pointer */
 695                            &piProcInfo); /* receives PROCESS_INFORMATION */
 696
 697   if (! fSuccess) return GetLastError();
 698
 699   if (priority > 0) { // for now only implement all lowered priorityies the same way
 700     SetPriorityClass(piProcInfo.hProcess, BELOW_NORMAL_PRIORITY_CLASS);
 701   }
 702
 703   /* Close the handles we don't need in the parent */
 704   CloseHandle(piProcInfo.hThread);
 705   CloseHandle(hChildStdinRd);
 706   CloseHandle(hChildStdoutWr);
 707
 708   process = piProcInfo.hProcess;
 709   fromE = (FILE*) _fdopen( _open_osfhandle((long)hChildStdoutRd, _O_TEXT|_O_RDONLY), "r");
 710   toE   = (FILE*) _fdopen( _open_osfhandle((long)hChildStdinWr, _O_WRONLY), "w");
 711 #else
 712     char *argv[10], *p, buf[200];
 713     int i, toEngine[2], fromEngine[2];
 714
 715     if (dir && dir[0] && chdir(dir)) { perror(dir); exit(1); }
 716     i = pipe(toEngine) + pipe(fromEngine); // create two pipes
 717     if(i < 0) printf("tellusererror UCI2WB: no engine pipe\n"), exit(0);
 718
 719     if ((pid = fork()) == 0) { // Child
 720         dup2(toEngine[0], 0);   close(toEngine[0]);   close(toEngine[1]);   // stdin from toE pipe
 721         dup2(fromEngine[1], 1); close(fromEngine[0]); close(fromEngine[1]); // stdout into fromE pipe
 722         dup2(1, fileno(stderr)); // stderr into frome pipe
 723
 724         strcpy(buf, cmdLine); p = buf;
 725         for (i=0;;) { argv[i++] = p; p = strchr(p, ' '); if (p == NULL) break; *p++ = 0; }
 726         argv[i] = NULL;
 727         if(priority) i = nice(priority);
 728         execvp(argv[0], argv); // startup engine
 729
 730         perror(argv[0]); exit(1); // could not start engine; quit.
 731     }
 732     signal(SIGPIPE, SIG_IGN);
 733     close(toEngine[0]); close(fromEngine[1]); // close engine ends of pipes in adapter
 734
 735     fromE = (FILE*) fdopen(fromEngine[0], "r"); // make into high-level I/O
 736     toE   = (FILE*) fdopen(toEngine[1], "w");
 737 #endif
 738   return NO_ERROR;
 739 }
 740
 741 int
 742 main(int argc, char **argv)
 743 {
 744         char *dir = NULL;
 745
 746
 747         if(argc == 2 && !strcmp(argv[1], "-v")) { printf("UCI2WB " VERSION " by H.G.Muller\n"); exit(0); }
 748         if(argc > 1 && !strcmp(argv[1], "debug")) { debug = 1; argc--; argv++; }
 749         if(argc > 1 && !strcmp(argv[1], "-var")) { strcpy(varList+1, argv[2]); *varList = ','; argc-=2; argv+=2; }
 750         if(argc > 2 && !strcmp(argv[1], "-nice")) { sscanf(argv[2], "%d", &priority); argc-=2; argv+=2; }
 751         if(argc > 2 && !strcmp(argv[1], "-kill")) { sscanf(argv[2], "%d", &killDelay); argc-=2; argv+=2; }
 752         if(argc > 1 && argv[1][0] == '-') { sc = argv[1][1]; argc--; argv++; }
 753         if(argc < 2) { printf("usage is: U%cI2WB [debug] [-s] <engine.exe> [<engine directory>]\n", sc-32); exit(-1); }
 754         if(argc > 2) dir = argv[2];
 755         if(argc > 3) strncpy(suffix, argv[3], 80);
 756
 757         if(sc == 'x') nameWord = valueWord = bTime = "", wTime = "opp", bInc = "increment", wInc = "oppincrement", unit = 1000; // switch to UCCI keywords
 758         else if(sc == 'f' ) frc = -1, sc = 'c';   // UCI for unannounced Chess960
 759         else if(sc == 'n') sc = 'c'; // UCI for normal Chess
 760
 761         // spawn engine proc
 762         if(StartEngine(binary = argv[1], dir) != NO_ERROR) { perror(argv[1]), exit(-1); }
 763
 764         Sync(INIT);
 765
 766         // create separate thread to handle engine->GUI traffic
 767 #ifdef WIN32
 768         CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) Engine2GUI, (LPVOID) NULL, 0, &thread_id);
 769 #else
 770         { pthread_t t; signal(SIGINT, SIG_IGN); signal(SIGTERM, SIG_IGN); pthread_create(&t, NULL, Engine2GUI, NULL); }
 771 #endif
 772
 773         // handle GUI->engine traffic in original thread
 774         GUI2Engine();
 775         return 0;
 776 }