4 * ----------------------------------------------------------------------
5 * Copyright (c) 1993, 1994, 1995 Matthias Mutz
6 * Copyright (c) 1999 Michael Vanier and the Free Software Foundation
7 * Copyright (c) 2008, 2013, 2014 Yann Dirson and the Free Software Foundation
9 * GNU SHOGI is based on GNU CHESS
11 * Copyright (c) 1988, 1989, 1990 John Stanback
12 * Copyright (c) 1992 Free Software Foundation
14 * This file is part of GNU SHOGI.
16 * GNU Shogi is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the
18 * Free Software Foundation; either version 3 of the License,
19 * or (at your option) any later version.
21 * GNU Shogi is distributed in the hope that it will be useful, but WITHOUT
22 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
23 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
26 * You should have received a copy of the GNU General Public License along
27 * with GNU Shogi; see the file COPYING. If not, see
28 * <http://www.gnu.org/licenses/>.
29 * ----------------------------------------------------------------------
38 /* Declarations of read(), write(), close(), and lseek(). */
48 unsigned booksize = BOOKSIZE;
49 unsigned short bookmaxply = BOOKMAXPLY;
50 unsigned bookcount = 0;
53 char *bookfile = BOOK;
55 char *bookfile = NULL;
59 char *binbookfile = BINBOOK;
61 char *binbookfile = NULL;
64 static char bmvstr[3][7];
67 static ULONG bhashkey;
73 * Generate move strings in different formats.
77 Balgbr(short f, short t, short flag)
79 short promoted = false;
90 piece = f - NO_SQUARES;
92 if (f > (NO_SQUARES + NO_PIECES))
95 flag = (dropmask | piece);
104 if ((f == t) && ((f != 0) || (t != 0)))
107 * error in algbr: FROM=TO=t
110 bmvstr[0][0] = bmvstr[1][0] = bmvstr[2][0] = '\0';
114 if ((flag & dropmask) != 0)
116 /* bmvstr[0]: P*3c bmvstr[1]: P'3c */
117 short piece = flag & pmask;
118 bmvstr[0][0] = pxx[piece];
120 bmvstr[0][2] = COL_NAME(column(t));
121 bmvstr[0][3] = ROW_NAME(row(t));
122 bmvstr[0][4] = bmvstr[2][0] = '\0';
123 strcpy(bmvstr[1], bmvstr[0]);
128 if ((f != 0) || (t != 0))
130 /* algebraic notation */
131 /* bmvstr[0]: 7g7f bmvstr[1]:
132 * (+)P7g7f(+) bmvstr[2]: (+)P7f(+) */
133 bmvstr[0][0] = COL_NAME(column(f));
134 bmvstr[0][1] = ROW_NAME(row(f));
135 bmvstr[0][2] = COL_NAME(column(t));
136 bmvstr[0][3] = ROW_NAME(row(t));
141 bmvstr[1][0] = bmvstr[2][0] = '+';
142 bmvstr[1][1] = bmvstr[2][1] = pxx[board[f]];
143 strcpy(&bmvstr[1][2], &bmvstr[0][0]);
144 strcpy(&bmvstr[2][2], &bmvstr[0][2]);
148 bmvstr[1][0] = bmvstr[2][0] = pxx[board[f]];
149 strcpy(&bmvstr[1][1], &bmvstr[0][0]);
150 strcpy(&bmvstr[2][1], &bmvstr[0][2]);
155 strcat(bmvstr[0], "+");
156 strcat(bmvstr[1], "+");
157 strcat(bmvstr[2], "+");
162 bmvstr[0][0] = bmvstr[1][0] = bmvstr[2][0] = '\0';
171 bkdisplay(char *s, int cnt, int moveno)
178 printf("matches = %d\n", cnt);
179 printf("inout move is :%s: move number %d side %s\n",
180 s, moveno / 2 + 1, (moveno & 1) ? "white" : "black");
182 #ifndef SEMIQUIETBOOKGEN
183 printf("legal moves are \n");
185 while (pnt < TrPnt[3])
189 if (is_promoted[board[node->f]] )
190 Balgbr(node->f | 0x80, node->t, (short) node->flags);
192 Balgbr(node->f, node->t, (short) node->flags);
195 bmvstr[0], bmvstr[1], bmvstr[2]);
198 printf("\n current board is\n");
200 for (r = (NO_ROWS - 1); r >= 0; r--)
202 for (c = 0; c <= (NO_COLS - 1); c++)
207 pc = (is_promoted[board[l]] ? '+' : ' ');
209 if (color[l] == neutral)
211 else if (color[l] == black)
212 printf("%c%c", pc, qxx[board[l]]);
214 printf("%c%c", pc, pxx[board[l]]);
224 for (color = black; color <= white; color++)
228 printf((color == black) ? "black " : "white ");
230 for (piece = pawn; piece <= king; piece++)
232 if ((c = Captured[color][piece]))
233 printf("%i%c ", c, pxx[piece]);
239 #endif /* SEMIQUIETBOOKGEN */
241 #endif /* QUIETBOOKGEN */
245 * BVerifyMove(s, mv, moveno)
247 * Compare the string 's' to the list of legal moves available for the
248 * opponent. If a match is found, make the move on the board.
252 BVerifyMove(char *s, unsigned short *mv, int moveno)
254 static short pnt, tempb, tempc, tempsf, tempst, cnt;
255 static struct leaf xnode;
260 MoveList(opponent, 2, -2, true);
263 while (pnt < TrPnt[3])
267 if (is_promoted[board[node->f]] )
268 Balgbr(node->f | 0x80, node->t, (short) node->flags);
270 Balgbr(node->f, node->t, (short) node->flags);
272 if (strcmp(s, bmvstr[0]) == 0 || strcmp(s, bmvstr[1]) == 0 ||
273 strcmp(s, bmvstr[2]) == 0)
284 MakeMove(opponent, &xnode, &tempb,
285 &tempc, &tempsf, &tempst, &INCscore);
287 if (SqAttacked(PieceList[opponent][0], computer, &blockable))
289 UnmakeMove(opponent, &xnode, &tempb, &tempc, &tempsf, &tempst);
290 /* Illegal move in check */
291 #if !defined QUIETBOOKGEN
292 puts("Illegal move (in check): %s");
293 bkdisplay(s, cnt, moveno);
299 *mv = (xnode.f << 8) | xnode.t;
301 if (is_promoted[board[xnode.t]] )
302 Balgbr(xnode.f | 0x80, xnode.t, false);
304 Balgbr(xnode.f, xnode.t, false);
311 #if !defined QUIETBOOKGEN
312 printf("Illegal move (no match): %s\n", s);
313 bkdisplay(s, cnt, moveno);
322 * Reset the board and other variables to start a new game.
331 flag.illegal = flag.mate = flag.quit
332 = flag.reverse = flag.bothsides = flag.onemove = flag.force
335 flag.post &= xboard; /* [HGM] xboard: do not clear in XBoard mode */
337 flag.material = flag.coords = flag.hash = flag.easy
338 = flag.beep = flag.rcptr
341 flag.stars = flag.shade = flag.back = flag.musttimeout = false;
345 CptrFlag[0] = TesujiFlag[0] = false;
349 for (l = 0; l < NO_SQUARES; l++)
351 board[l] = Stboard[l];
352 color[l] = Stcolor[l];
358 hashbd = hashkey = 0;
363 Vparse (FILE * fd, USHORT *mv, USHORT *flags, int moveno)
372 while (((c = getc(fd)) == ' ')
373 || (c == '!') || (c == '/') || (c == '\n'));
377 /* amount of time spent for the last move */
378 while (((c = getc(fd)) != ')') && (c != EOF));
382 while (((c = getc(fd)) == ' ') || (c == '\n'));
388 /* comment for the actual game */
389 while (((c = getc(fd))) != ']' && (c != EOF));
393 while (((c = getc(fd))) == ' ' || (c == '\n'));
409 /* goes to end of line */
422 while ((c >= '0') && (c <= '9'))
430 while (((c = getc(fd)) == ' ') || (c == '.') || (c == '\n'));
434 while (((c = getc(fd)) != '?') && (c != '!') && (c != ' ')
435 && (c != '(') && (c != '\n') && (c != '\t') && (c != EOF))
440 if ((c != 'x') && (c != '-') && (c != ',')
441 && (c != ';') && (c != '='))
451 while (((c = getc(fd)) != ')') && (c != EOF));
462 while ((c != '\n') && (c != EOF))
471 if (strcmp(s, "draw") == 0)
473 else if (strcmp(s, "1-0") == 0)
475 else if (strcmp(s, "0-1") == 0)
477 else if (strcmp(s, "Resigns") == 0)
479 else if (strcmp(s, "Resigns.") == 0)
481 else if (strcmp(s, "Sennichite") == 0)
483 else if (strcmp(s, "Sennichite.") == 0)
485 else if (strcmp(s, "Jishogi") == 0)
487 else if (strcmp(s, "Jishogi.") == 0)
493 i = BVerifyMove(s, mv, moveno);
497 /* Bad move, not for the program to play */
498 *flags |= BADMOVE; /* Flag it ! */
499 while (((c = getc(fd)) == '?') || (c == '!') || (c == '/'));
504 /* Do not use by computer */
505 *flags |= BADMOVE; /* Flag it ! */
507 while (((c = getc(fd)) == '?') || (c == '!') || (c == '/'));
513 *flags |= GOODMOVE; /* Flag it ! */
515 while (((c = getc(fd)) == '?') || (c == '!') || (c == '/'));
523 while (((c = getc(fd)) != ')') && (c != EOF));
527 /* flush to start of next */
528 while (((c = getc(fd)) != '#') && (c != EOF));
546 static struct gdxadmin ADMIN;
548 static struct gdxdata DATA;
550 /* lts(l) returns most significant 16 bits of l */
552 #if SIZEOF_LONG == 8 /* 64-bit long i.e. 8 bytes */
553 # define lts(x) (USHORT)(((x >> 48) & 0xfffe) | side)
555 # if defined USE_LTSIMP
556 static USHORT ltsimp(long x)
559 n = (((x >> 16) & 0xfffe));
562 # define lts(x) (USHORT)(ltsimp(x) | side)
564 # define lts(x) (USHORT)(((x >> 16)&0xfffe) | side)
569 /* #define HashValue(l) lts(l) */
570 #define HashValue(l) (USHORT)(l & 0xffff)
574 #define MAXOFFSET(B) ((B.booksize - 1) * sizeof_gdxdata + sizeof_gdxadmin)
576 static ULONG HashOffset(ULONG hashkey, struct gdxadmin *B)
578 return (hashkey % B->booksize) * sizeof_gdxdata + sizeof_gdxadmin;
582 static ULONG NextOffset(struct gdxadmin *B, ULONG offset)
584 offset += sizeof_gdxdata;
585 if (offset > B->maxoffset)
586 offset = sizeof_gdxadmin;
591 static void WriteAdmin(void)
593 lseek(gfd, 0, SEEK_SET);
594 write(gfd, (char *)&ADMIN, sizeof_gdxadmin);
597 static void WriteData(ULONG offset, int *mustwrite)
602 lseek(gfd, offset, SEEK_SET);
603 write(gfd, (char *)&DATA, sizeof_gdxdata);
607 static int ReadAdmin(void)
609 lseek(gfd, 0, SEEK_SET);
610 return (sizeof_gdxadmin == read(gfd, (char *)&ADMIN, sizeof_gdxadmin));
613 static int ReadData(ULONG offset, struct gdxdata *DATA)
615 lseek(gfd, offset, SEEK_SET);
616 return (sizeof_gdxdata == read(gfd, (char *)DATA, sizeof_gdxdata));
623 * CHECKME: is this still valid esp. wrt gnushogi.book?
625 * Read in the Opening Book file and parse the algebraic notation for a move
626 * into an unsigned integer format indicating the from and to square. Create
627 * a linked list of opening lines of play, with entry->next pointing to the
628 * next line and entry->move pointing to a chunk of memory containing the
629 * moves. More Opening lines of up to 100 half moves may be added to
630 * gnushogi.book. But now it's a hashed table by position which yields a move
631 * or moves for each position. It no longer knows about openings per se only
632 * positions and recommended moves in those positions.
639 ULONG currentoffset = 0;
646 unsigned int games = 0;
652 if ((fd = fopen(bookfile, "r")) == NULL)
653 fd = fopen("gnushogi.tbk", "r");
657 /* yes add to book */
658 /* open book as writer */
659 gfd = open(binbookfile, O_RDONLY | O_BINARY);
665 B.bookcount = ADMIN.bookcount;
666 B.booksize = ADMIN.booksize;
667 B.maxoffset = ADMIN.maxoffset;
669 if (B.booksize && !(B.maxoffset == MAXOFFSET(B)))
671 printf("bad format %s\n", binbookfile);
677 printf("bad format %s\n", binbookfile);
681 gfd = open(binbookfile, O_RDWR | O_BINARY);
686 gfd = open(binbookfile, O_RDWR | O_CREAT | O_BINARY, 0644);
688 ADMIN.bookcount = B.bookcount = 0;
689 ADMIN.booksize = B.booksize = booksize;
690 B.maxoffset = ADMIN.maxoffset = MAXOFFSET(B);
698 printf("creating bookfile %s %ld %ld\n",
699 binbookfile, B.maxoffset, B.booksize);
701 for (x = 0; x < B.booksize; x++)
703 int mustwrite = true;
704 WriteData(sizeof_gdxadmin + x* sizeof_gdxdata, &mustwrite);
710 int mustwrite = false;
711 /* setvbuf(fd, buffr, _IOFBF, 2048); */
713 hashbd = hashkey = 0;
716 while ((c = Vparse(fd, &mv, &flags, i)) >= 0)
721 * If this is not the first move of an opening and
722 * if it's the first time we have seen it then
723 * save the next move as a hint.
727 if (i < bookmaxply + 2)
729 if (i > 1 && !(flags & BADMOVE))
732 if (i < bookmaxply + 1)
735 * See if this position and move already
736 * exist from some other opening.
739 WriteData(currentoffset, &mustwrite);
740 currentoffset = HashOffset(bhashkey, &B);
745 if (!ReadData(currentoffset, &DATA))
746 break; /* corrupted binbook file */
749 break; /* free entry */
751 if (DATA.hashkey == HashValue(bhashkey)
752 && DATA.hashbd == bhashbd)
754 if (DATA.bmove == mv)
757 * Yes, so just bump count - count
758 * is used to choose the opening
759 * move in proportion to its
760 * presence in the book.
773 if (DATA.flags & LASTMOVE)
775 DATA.flags &= (~LASTMOVE);
777 WriteData(currentoffset, &mustwrite);
782 currentoffset = NextOffset(&B, currentoffset);
787 * Doesn't exist so add it to the book.
794 if ((B.bookcount % 1000) == 0)
796 /* CHECKME: may want to get rid of this,
797 * especially for xshogi. */
798 printf("%ld rec %d openings "
803 /* initialize a record */
804 DATA.hashbd = bhashbd;
805 DATA.hashkey = HashValue(bhashkey);
807 DATA.flags = flags | LASTMOVE;
816 opponent = computer ^ 1;
822 /* reset for next opening */
824 WriteData(currentoffset, &mustwrite);
831 WriteData(currentoffset, &mustwrite);
833 /* write admin rec with counts */
834 ADMIN.bookcount = B.bookcount;
841 if (binbookfile != NULL)
843 /* open book as reader */
844 gfd = open(binbookfile, O_RDONLY | O_BINARY);
848 if (ReadAdmin() && (!ADMIN.booksize
849 || (ADMIN.maxoffset == MAXOFFSET(ADMIN))))
851 B.bookcount = ADMIN.bookcount;
852 B.booksize = ADMIN.booksize;
853 B.maxoffset = ADMIN.maxoffset;
857 printf("bad format %s\n", binbookfile);
865 B.booksize = booksize;
869 sprintf(msg, "Book used %lu(%lu).", B.bookcount, B.booksize);
870 dsp->ShowMessage(msg);
873 /* Set everything back to start the game. */
877 /* Now get ready to play .*/
880 dsp->ShowMessage("Can't find book.");
889 * Go through each of the opening lines of play and check for a match with
890 * the current game listing. If a match occurs, generate a random
891 * number. If this number is the largest generated so far then the next
892 * move in this line becomes the current "candidate". After all lines are
893 * checked, the candidate move is put at the top of the Tree[] array and
894 * will be played by the program. Note that the program does not handle
895 * book transpositions.
899 OpeningBook(unsigned short *hint)
903 int possibles = TrPnt[2] - TrPnt[1];
905 gsrand((unsigned int) time((long *) 0));
909 * Find all the moves for this position - count them and get their
918 struct gdxdata OBB[128];
920 if (B.bookcount == 0)
927 currentoffset = HashOffset(hashkey, &B);
929 printf("looking for book move, bhashbd = 0x%lx bhashkey = 0x%x\n",
930 (ULONG)hashbd, HashValue(hashkey));
934 if (!ReadData(currentoffset, &OBB[x]))
937 if (OBB[x].bmove == 0)
941 printf("compare with bhashbd = 0x%lx bhashkey = 0x%x\n",
942 OBB[x].hashbd, OBB[x].hashkey);
944 if ((OBB[x].hashkey == HashValue(hashkey))
945 && (OBB[x].hashbd == (ULONG)hashbd))
949 if (OBB[x-1].flags & LASTMOVE)
953 currentoffset = NextOffset(&B, currentoffset);
957 printf("%d book move(s) found.\n", x);
966 for (i = 0; i < x; i++)
968 if (OBB[i].flags & BADMOVE)
972 /* Is the move in the MoveList? */
973 for (b = TrPnt[1]; b < (unsigned) TrPnt[2]; b++)
975 if (((Tree[b].f << 8) | Tree[b].t) == m)
978 Tree[b].score = DONTUSE;
987 movealgbr(m = OBB[i].bmove, s);
988 printf("finding book move: %s\n", s);
990 summ += OBB[i].count;
1000 r = (urand() % summ);
1002 for (i = 0; i < x; i++)
1004 if (!(OBB[i].flags & BADMOVE))
1006 if (r < OBB[i].count)
1021 /* Make sure the move is in the MoveList. */
1022 for (b = TrPnt[1]; b < (unsigned) TrPnt[2]; b++)
1024 if (((Tree[b].f << 8) | Tree[b].t) == m)
1026 Tree[b].flags |= book;
1032 /* Make sure it's the best. */
1034 pick(TrPnt[1], TrPnt[2] - 1);
1036 if (Tree[TrPnt[1]].score)
1043 /* Ok, pick up the hint and go. */