gnushogi/gnushogi.h

   1 /*
   2  * FILE: gnushogi.h
   3  *
   4  *     Main header file for GNU Shogi.
   5  *
   6  * ----------------------------------------------------------------------
   7  * Copyright (c) 1993, 1994, 1995 Matthias Mutz
   8  * Copyright (c) 1999 Michael Vanier and the Free Software Foundation
   9  * Copyright (c) 2008, 2013, 2014 Yann Dirson and the Free Software Foundation
  10  *
  11  * GNU SHOGI is based on GNU CHESS
  12  *
  13  * Copyright (c) 1988, 1989, 1990 John Stanback
  14  * Copyright (c) 1992 Free Software Foundation
  15  *
  16  * This file is part of GNU SHOGI.
  17  *
  18  * GNU Shogi is free software; you can redistribute it and/or modify it
  19  * under the terms of the GNU General Public License as published by the
  20  * Free Software Foundation; either version 3 of the License,
  21  * or (at your option) any later version.
  22  *
  23  * GNU Shogi is distributed in the hope that it will be useful, but WITHOUT
  24  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  25  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  26  * for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License along
  29  * with GNU Shogi; see the file COPYING. If not, see
  30  * <http://www.gnu.org/licenses/>.
  31  * ----------------------------------------------------------------------
  32  *
  33  */
  34
  35 /* Hack for anal-retentive ANSI-compliance if desired: */
  36 #define inline
  37
  38 /* FIXME: this file needs to be reorganized in some rational manner. */
  39
  40 #ifndef _GNUSHOGI_H_
  41 #define _GNUSHOGI_H_
  42
  43 #include "config.h"        /* Portability #defines. */
  44 #include "debug.h"
  45 #include "opts.h"          /* Various option-setting #defines.  */
  46
  47 #include <stdarg.h>
  48
  49 /*
  50  * Display options.
  51  */
  52
  53 typedef enum {
  54   DISPLAY_RAW,
  55 #ifdef HAVE_LIBCURSES
  56   DISPLAY_CURSES,
  57 #endif
  58   DISPLAY_X
  59 } display_t;
  60 extern display_t display_type;
  61
  62 #define XSHOGI     (display_type == DISPLAY_X)
  63
  64
  65 /* Miscellaneous globals. */
  66
  67 extern short hard_time_limit; /* If you exceed time limit, you lose.   */
  68 extern short nolist;          /* Don't list game after exit.           */
  69 extern short xboard;          /* Use XBoard instead of xShogi protocol */
  70
  71
  72 /*
  73  * Options for various compilers/OSs.
  74  */
  75
  76 /*
  77  * type small_short must cover -128 .. 127.  In case of trouble,
  78  * try commenting out "signed".  If this doesn't help, use short.
  79  */
  80
  81 #define small_short  signed char
  82 #define small_ushort unsigned char
  83
  84
  85 typedef small_ushort   UBYTE;
  86 typedef short          SHORT;
  87 typedef unsigned short USHORT;
  88 typedef int            INT;
  89 typedef unsigned int   UINT;
  90 typedef long           LONG;
  91 typedef unsigned long  ULONG;
  92
  93
  94 #if !defined(HAVE_MEMCPY) && !defined(HAVE_BCOPY)
  95 #  define array_copy(src, dst, len) \
  96    { \
  97        long i; \
  98        char  *psrc = (char  *)src, *pdst = (char  *)dst; \
  99        for (i = len; i; pdst[--i] = psrc[i]); \
 100    }
 101 #  define array_zero(dst, len) \
 102   { \
 103       long i; \
 104       char  *pdst = (char  *)dst; \
 105       for (i = len; i; pdst[--i] = 0); \
 106   }
 107 #elif !defined(HAVE_MEMCPY)   /* BSD and derivatives */
 108 #  define array_copy(src, dst, len) bcopy(src, dst, len)
 109 #  define array_zero(dst, len)      bzero(dst, len)
 110 #else /* System V and derivatives */
 111 #  define array_copy(src, dst, len) memcpy(dst, src, len)
 112 #  define array_zero(dst, len)      memset(dst, 0, len)
 113 #endif
 114
 115
 116 #ifndef __GNUC__
 117 #  define inline
 118 #endif
 119
 120
 121 /*
 122  * Standard header files.
 123  */
 124
 125 #include <stdio.h>
 126 #include <ctype.h>
 127 #include <stdlib.h>
 128 #include <assert.h>
 129 #include <string.h>
 130
 131 #include <sys/param.h>
 132 #include <sys/types.h>
 133 #ifdef WIN32
 134 #  include <windows.h>
 135 #else
 136    typedef small_short    BYTE;
 137 #  include <sys/times.h>
 138 #  include <sys/ioctl.h>
 139 #endif
 140
 141 #if TIME_WITH_SYS_TIME
 142 #  include <sys/time.h>
 143 #  include <time.h>
 144 #else
 145 #  if HAVE_SYS_TIME_H
 146 #    include <sys/time.h>
 147 #  else
 148 #    include <time.h>
 149 #  endif
 150 #endif
 151
 152 #define RWA_ACC "r+"
 153 #define WA_ACC "w+"
 154 #ifdef BINBOOK
 155 extern char *binbookfile;
 156 #endif
 157
 158 extern char *bookfile;
 159 extern char  *xwin;
 160 extern char  *Lang;
 161 extern void movealgbr(short m, char *s);
 162
 163
 164 #define SEEK_SET 0
 165 #define SEEK_END 2
 166
 167 #ifdef MINISHOGI
 168 #define NO_PIECES       11
 169 #define MAX_CAPTURED    19
 170 #define NO_PTYPE_PIECES 11
 171 #define NO_COLS          5
 172 #define NO_ROWS          5
 173 #define NO_CAMP_ROWS     1
 174 #else
 175 #define NO_PIECES       15
 176 #define MAX_CAPTURED    19
 177 #define NO_PTYPE_PIECES 15
 178 #define NO_COLS          9
 179 #define NO_ROWS          9
 180 #define NO_CAMP_ROWS     3
 181 #endif
 182 #define NO_SQUARES      (NO_COLS*NO_ROWS)
 183
 184 #define ROW_NAME(n) ( xboard ? '1' + n : ('a' + NO_ROWS - 1 - n) )
 185 #define COL_NAME(n) ( xboard ? 'a' + n : ('1' + NO_COLS - 1 - n) )
 186 #define ROW_NUM(c) ( xboard ? c - '1' : ('a' + NO_ROWS - 1 - c) )
 187 #define COL_NUM(c) ( xboard ? c - 'a' : ('1' + NO_COLS - 1 - c) )
 188
 189
 190 #if defined HASHFILE || defined CACHE
 191 #  define PTBLBDSIZE (NO_SQUARES + NO_PIECES)
 192 #endif
 193
 194 #include "eval.h"
 195
 196 #define SCORE_LIMIT 12000
 197
 198 /* masks into upper 16 bits of attacks array */
 199 /* observe order of relative piece values */
 200 #define CNT_MASK 0x000000FF
 201 #define ctlP  0x00200000
 202 #define ctlPp 0x00100000
 203 #define ctlL  0x00080000
 204 #define ctlN  0x00040000
 205 #define ctlLp 0x00020000
 206 #define ctlNp 0x00010000
 207 #define ctlS  0x00008000
 208 #define ctlSp 0x00004000
 209 #define ctlG  0x00002000
 210 #define ctlB  0x00001000
 211 #define ctlBp 0x00000800
 212 #define ctlR  0x00000400
 213 #define ctlRp 0x00000200
 214 #define ctlK  0x00000100
 215
 216 /* attack functions */
 217 #define Pattack(c, u)   (attack[c][u] > ctlP)
 218 #define Anyattack(c, u) (attack[c][u] != 0)
 219
 220 /* hashtable flags */
 221 #define truescore   0x0001
 222 #define lowerbound  0x0002
 223 #define upperbound  0x0004
 224 #define kingcastle  0x0008
 225 #define queencastle 0x0010
 226 #define evalflag    0x0020
 227
 228 /* King positions */
 229 #define BlackKing PieceList[black][0]
 230 #define WhiteKing PieceList[white][0]
 231 #define OwnKing   PieceList[c1][0]
 232 #define EnemyKing PieceList[c2][0]
 233
 234
 235 /* board properties */
 236 #define InBlackCamp(sq) ((sq) < (NO_COLS * NO_CAMP_ROWS))
 237 #define InWhiteCamp(sq) ((sq) >= (NO_COLS * (NO_ROWS - NO_CAMP_ROWS)))
 238 #define InPromotionZone(side, sq) \
 239 (((side) == black) ? InWhiteCamp(sq) : InBlackCamp(sq))
 240
 241 /* constants */
 242 /* FIXME ? */
 243 #define OPENING_HINT 0x141d /* P7g-7f (20->29) */
 244
 245 /* truth values */
 246 #ifndef false
 247 #define false 0
 248 #endif
 249
 250 #ifndef true
 251 #define true  1
 252 #endif
 253
 254 /* colors */
 255 #define black   0
 256 #define white   1
 257 #define neutral 2
 258
 259 /* piece code defines */
 260 enum {
 261     no_piece = 0,
 262     pawn,
 263 #ifndef MINISHOGI
 264     lance,
 265     knight,
 266 #endif
 267     /* start of pieces that can be dropped at any square */
 268     silver,
 269     gold,
 270     bishop,
 271     rook,
 272     ppawn,
 273 #ifndef MINISHOGI
 274     plance,
 275     pknight,
 276 #endif
 277     psilver,
 278     pbishop,
 279     prook,
 280     king
 281 };
 282
 283 /* move types */
 284 enum {
 285     ptype_no_piece = 0,
 286     ptype_pawn = 0,
 287 #ifndef MINISHOGI
 288     ptype_lance,
 289     ptype_knight,
 290 #endif
 291     ptype_silver,
 292     ptype_gold,
 293     ptype_bishop,
 294     ptype_rook,
 295     ptype_pbishop,
 296     ptype_prook,
 297     ptype_king,
 298     ptype_wpawn,
 299 #ifndef MINISHOGI
 300     ptype_wlance,
 301     ptype_wknight,
 302 #endif
 303     ptype_wsilver,
 304     ptype_wgold
 305 };
 306
 307 /* node flags */
 308 #define pmask        0x000f /*    15 */
 309 #define promote      0x0010 /*    16 */
 310 #define dropmask     0x0020 /*    32 */
 311 #define exact        0x0040 /*    64 */
 312 #define tesuji       0x0080 /*   128 */
 313 #define check        0x0100 /*   256 */
 314 #define capture      0x0200 /*   512 */
 315 #define draw         0x0400 /*  1024 */
 316 #define stupid       0x0800 /*  2048 */
 317 #define questionable 0x1000 /*  4096 */
 318 #define kingattack   0x2000 /*  8192 */
 319 #define book         0x4000 /* 16384 */
 320
 321 /* move quality flags */
 322 #define goodmove     tesuji
 323 #define badmove      stupid
 324 #ifdef EASY_OPENINGS
 325 #define difficult    questionable
 326 #endif
 327
 328 /* move symbols */
 329 #ifndef MINISHOGI
 330 #define pxx (" PLNSGBRPLNSBRK ")
 331 #define qxx (" plnsgbrplnsbrk ")
 332 #else
 333 #define pxx (" PSGBRPSBRK ")
 334 #define qxx (" psgbrpsbrk ")
 335 #endif
 336
 337 /***************** Table limits ********************************************/
 338
 339 /*
 340  * ttblsz must be a power of 2. Setting ttblsz 0 removes the transposition
 341  * tables.
 342  */
 343
 344 #if defined NOTTABLE
 345 #  define vttblsz 0
 346 #elif defined SMALL_MEMORY
 347 #  if defined SAVE_SSCORE
 348 #    define vttblsz (1 << 12)
 349 #  else
 350 #    if defined EXTRA_2MB
 351 #      define vttblsz (1 << 12)
 352 #    else
 353 #      define vttblsz (1 << 10)
 354 #    endif
 355 #  endif
 356 #else
 357 #  define vttblsz (100001)
 358 #endif
 359
 360 #if defined SMALL_MEMORY
 361 #  define MINTTABLE (0)
 362 #else
 363 #  define MINTTABLE (8000)    /* min ttable size -1 */
 364 #endif
 365
 366 #define ttblsz vttblsz
 367
 368 #if defined SMALL_MEMORY
 369 #  if !defined SAVE_SSCORE
 370 #    define TREE 1500             /* max number of tree entries */
 371 #  else
 372 #    define TREE 2500             /* max number of tree entries */
 373 #  endif
 374 #else
 375 #  define TREE 4000               /* max number of tree entries */
 376 #endif
 377
 378 #define MAXDEPTH  40            /* max depth a search can be carried */
 379 #define MINDEPTH   2            /* min search depth =1 (no hint), >1 hint */
 380 #define MAXMOVES 300            /* max number of half moves in a game */
 381 #define CPSIZE   241            /* size of lang file max */
 382
 383 #if defined SMALL_MEMORY
 384 #  if defined SAVE_SSCORE
 385 #    define ETABLE (1 << 10)      /* static eval cache */
 386 #  else
 387 #    if defined EXTRA_2MB
 388 #      define ETABLE (1 << 10)    /* static eval cache */
 389 #    else
 390 #      define ETABLE (1 << 8)     /* static eval cache */
 391 #    endif
 392 #  endif
 393 #else
 394 #  define ETABLE (10001)          /* static eval cache */
 395 #endif
 396
 397 /***************** tuning paramaters *******************/
 398
 399 #if defined VERY_SLOW_CPU
 400 #  define MINRESPONSETIME 300
 401 #elif defined SLOW_CPU
 402 #  define MINRESPONSETIME 200
 403 #else
 404 #  define MINRESPONSETIME 100     /* 1 s */
 405 #endif
 406
 407 #define MINGAMEIN  4
 408 #define MINMOVES  15
 409 #define CHKDEPTH   1   /* always look forward CHKDEPTH
 410                         * half-moves if in check */
 411
 412 #if defined SLOW_CPU || defined VERY_SLOW_CPU
 413 #  define DEPTHBEYOND 7     /* Max to go beyond Sdepth */
 414 #else
 415 #  define DEPTHBEYOND 11    /* Max to go beyond Sdepth */
 416 #endif
 417
 418 #define HASHDEPTH      4  /* depth above which to use HashFile */
 419 #define HASHMOVELIMIT 40  /* Use HashFile only for this many moves */
 420 #define PTVALUE        0  /* material value below which pawn threats at
 421                            * 5 & 3 are used */
 422 #define ZDEPTH 3          /* depth beyond which to check
 423                            * ZDELTA for extra time */
 424 #define ZDELTA 10         /* score delta per ply to cause
 425                            * extra time to be given */
 426 #define BESTDELTA 90
 427
 428 /* about 1/2 second worth of nodes for your machine */
 429 #if defined VERY_SLOW_CPU
 430 /* check the time every ZNODES positions */
 431 #  define ZNODES (flag.tsume ? 20 : 50)
 432 #elif defined SLOW_CPU
 433 #  define ZNODES (flag.tsume ? 40 : 100)
 434 #else
 435 #  define ZNODES (flag.tsume ? 400 : 1000)
 436 #endif
 437
 438 #define MAXTCCOUNTX  10  /* max number of time clicks
 439                           * per search to complete ply */
 440 #define MAXTCCOUNTR   4  /* max number of time clicks
 441                           * per search extensions*/
 442 #define SCORESPLIM    8  /* Score space doesn't apply after this stage */
 443 #define SDEPTHLIM    (Sdepth + 1)
 444 #define HISTORYLIM 4096  /* Max value of history killer */
 445
 446 #ifdef EXACTHISTORY
 447 #  if defined SMALL_MEMORY
 448 #    define HISTORY_MASK 0x8000     /* mask to MSB of history index */
 449 #    define HISTORY_SIZE 0x10000    /* size of history table */
 450 #  else
 451 #    define HISTORY_MASK (1 << 15)  /* mask to MSB of history index */
 452 #    define HISTORY_SIZE (1 << 16)  /* size of history table */
 453 #  endif
 454 #else
 455 /* smaller history table, but dangerous because of collisions */
 456 #  define HISTORY_MASK 0x3fff     /* mask to significant bits
 457                                    * of history index */
 458 #  if defined SMALL_MEMORY
 459 #    define HISTORY_SIZE 0x4000 /* size of history table */
 460 #  else
 461 #    define HISTORY_SIZE (1 << 14)  /* size of history table */
 462 #  endif
 463 #endif
 464
 465 #define sizeof_history (sizeof(unsigned short) * (size_t)HISTORY_SIZE)
 466
 467 #ifdef EXACTHISTORY
 468 /* Map from.to (8bit.8bit) to from.to (0.7bit.8bit) */
 469 #  define khmove(mv) (mv & 0x7fff)
 470 #  define hmove(mv) ((mv & 0x7fff) ^ 0x5555)
 471 #else
 472 /* Map from.to (8bit.8bit) to from.to (00.7bit.7bit) */
 473 /* Swap bits of ToSquare in case of promotions, hoping that
 474    no catastrophic collision occurs. */
 475 #  define khmove(mv) (((mv & 0x7f00) >> 1) | \
 476            ((mv & 0x0080) ? ((mv & 0x007f) ^ 0x007f) : (mv & 0x007f)))
 477 #  define hmove(mv) (khmove(mv) ^ 0x2aaa)
 478 #endif
 479
 480 /* mask color to 15th bit */
 481 #ifdef EXACTHISTORY
 482 #  define hindex(c, mv) ((c ? HISTORY_MASK : 0) | hmove(mv))
 483 #else
 484 /* for white, swap bits, hoping that no catastrophic collision occurs. */
 485 #  define hindex(c, mv) (c ? ((~hmove(mv)) & HISTORY_MASK) : hmove(mv))
 486 #endif
 487
 488 #define EWNDW  10    /* Eval window to force position scoring at depth
 489                       * greater than (Sdepth + 2)        */
 490 #define WAWNDW 90    /* alpha window when computer black */
 491 #define WBWNDW 90    /* beta window when computer black  */
 492 #define BAWNDW 90    /* alpha window when computer white */
 493 #define BBWNDW 90    /* beta window when computer white  */
 494 #define BXWNDW 90    /* window to force position scoring at lower */
 495 #define WXWNDW 90    /* window to force position scoring at lower */
 496
 497 #define DITHER  5    /* max amount random can alter a pos value */
 498 #define LBONUS  1    /* points per stage value of L increases   */
 499 #define BBONUS  2    /* points per stage value of B increases   */
 500 #define RBONUS  2    /* points per stage value of R increases   */
 501
 502 #define QUESTIONABLE (valueK)   /* Penalty for questionable moves. */
 503
 504 #if defined STUPID
 505 #  undef STUPID
 506 #endif
 507
 508 #define STUPID (valueR << 1)    /* Penalty for stupid moves. */
 509
 510 #define KINGPOSLIMIT (-1)      /* King positional scoring limit */
 511 #define KINGSAFETY  32
 512 #define MAXrehash (7)
 513
 514 /******* parameters for Opening Book ****************/
 515
 516 #define BOOKSIZE   8000  /* Number of unique position/move
 517                           * combinations allowed */
 518 #define BOOKMAXPLY   40           /* Max plys to keep in book database */
 519 #define BOOKFAIL (BOOKMAXPLY / 2) /* if no book move found for BOOKFAIL
 520                                    * turns stop using book */
 521 #define BOOKPOCKET          64
 522 #define BOOKRAND          1000  /* used to select an opening move
 523                                  * from a list */
 524 #define BOOKENDPCT         950  /* 5 % chance a BOOKEND will stop the book */
 525 #define DONTUSE         -32760  /* flag move as don't use */
 526 #define ILLEGAL_TRAPPED -32761  /* flag move as illegal:
 527                                  * no move from this square */
 528 #define ILLEGAL_DOUBLED -32762  /* flag move as illegal:
 529                                  * two pawns on one column */
 530 #define ILLEGAL_MATE    -32763  /* flag move as illegal:
 531                                  * pawn drop with mate */
 532
 533 /*****************************************************/
 534
 535 struct hashval
 536 {
 537     unsigned long key, bd;
 538 };
 539
 540 struct hashentry
 541 {
 542     unsigned long hashbd;
 543     unsigned short mv;
 544     unsigned char depth; /* unsigned char saves some space */
 545     unsigned char flags;
 546 #ifdef notdef
 547     unsigned short age;
 548 #endif
 549     short score;
 550 #ifdef HASHTEST
 551     unsigned char bd[PTBLBDSIZE];
 552 #endif /* HASHTEST */
 553 };
 554
 555 #if defined HASHFILE || defined CACHE
 556 struct etable
 557 {
 558     unsigned long ehashbd;
 559     short escore[2];
 560 #if !defined SAVE_SSCORE
 561     short sscore[NO_SQUARES];
 562 #endif
 563     short score;
 564     small_short hung[2];
 565 #ifdef CACHETEST
 566     unsigned char bd[PTBLBDSIZE];
 567 #endif /* CACHETEST */
 568 };
 569
 570 #if defined CACHE
 571 extern short use_etable;
 572 typedef struct etable etable_field[ETABLE];
 573 extern etable_field  *etab[2];
 574 #endif
 575
 576 /*
 577  * CHECKME! Is this valid?
 578  *
 579  * persistent transposition table. By default, the size is (1 << vfilesz).
 580  * If you change the size, be sure to run gnushogi -c [vfilesz]
 581  * before anything else.
 582  */
 583
 584 #define frehash 6
 585
 586 #if defined SMALL_MEMORY
 587 #  define vfilesz 10
 588 #else
 589 #  define vfilesz 14
 590 #endif
 591
 592 struct fileentry
 593 {
 594     unsigned char bd[PTBLBDSIZE];
 595     unsigned char f, t, flags, depth, sh, sl;
 596 };
 597
 598 #endif /* HASHFILE */
 599
 600
 601 struct leaf
 602 {
 603     small_ushort f, t;
 604     short score, reply, width;
 605     short INCscore;
 606     unsigned short flags;
 607 };
 608
 609
 610 struct GameRec
 611 {
 612     unsigned short gmove;    /* this move */
 613     short score;             /* score after this move */
 614     short depth;             /* search depth this move */
 615     long  time;               /* search time this move */
 616     short fpiece;            /* moved or dropped piece */
 617     short piece;             /* piece captured */
 618     short color;             /* color */
 619     short flags;             /* move flags capture, promote, castle */
 620     short Game50;            /* flag for repetition */
 621     long  nodes;              /* nodes searched for this move */
 622     unsigned long hashkey, hashbd;   /* board key before this move */
 623 };
 624
 625
 626 struct TimeControlRec
 627 {
 628     short moves[2];
 629     long  clock[2];
 630 };
 631
 632
 633 struct flags
 634 {
 635     short mate;              /* the game is over */
 636     short post;              /* show principle variation */
 637     short quit;              /* quit/exit */
 638     short regularstart;      /* did the game start from standard
 639                               * initial board ? */
 640     short reverse;           /* reverse board display */
 641     short bothsides;         /* computer plays both sides */
 642     short hash;              /* enable/disable transposition table */
 643     short force;             /* enter moves */
 644     short easy;              /* disable thinking on opponents time */
 645     short beep;              /* enable/disable beep */
 646     short timeout;           /* time to make a move */
 647     short musttimeout;       /* time to make a move */
 648     short back;              /* time to make a move */
 649     short rcptr;             /* enable/disable recapture heuristics */
 650     short rv;                /* reverse video */
 651     short stars;             /* add stars to uxdsp screen */
 652     short coords;            /* add coords to visual screen */
 653     short shade;
 654     short material;          /* draw on lack of material */
 655     short illegal;           /* illegal position */
 656     short onemove;           /* timing is onemove */
 657     short gamein;            /* timing is gamein */
 658     short tsume;             /* first consider checks */
 659 };
 660
 661 extern FILE *debugfile;
 662
 663 #ifndef EVALFILE
 664 #define EVALFILE "/tmp/EVAL"
 665 #endif
 666
 667 extern FILE *debug_eval_file;
 668 extern short debug_moves;
 669
 670
 671 #ifdef HISTORY
 672 extern short use_history;
 673 extern unsigned short  *history;
 674 #endif
 675
 676 extern long znodes;
 677
 678 extern const char* ColorStr[2];
 679
 680 extern char mvstr[4][6];
 681 extern int mycnt1, mycnt2;
 682 extern struct leaf rootnode;
 683 extern struct leaf  *Tree;
 684 extern struct leaf  *root;
 685 extern char savefile[], listfile[];
 686 extern short TrPnt[];
 687 extern small_short board[], color[];
 688 extern const small_short sweep[NO_PIECES];
 689 extern small_short PieceList[2][NO_SQUARES], PawnCnt[2][NO_COLS];
 690 extern small_short Captured[2][NO_PIECES];
 691
 692 #ifndef HAVE_MEMSET
 693 #  define ClearCaptured() \
 694   { \
 695       short piece, color; \
 696       for (color = black; color <= white; color++) \
 697           for (piece = 0; piece < NO_PIECES; piece++) \
 698               Captured[color][piece] = 0; \
 699   }
 700 #else
 701 #  define ClearCaptured() \
 702   memset((char *)Captured, 0, (unsigned long)sizeof(Captured))
 703 #endif /* HAVE_MEMSET */
 704
 705 extern small_short Mvboard[];
 706
 707 #if !defined SAVE_SVALUE
 708 extern short svalue[NO_SQUARES];
 709 #endif
 710
 711 extern short pscore[2]; /* eval.c */
 712 extern int EADD; /* eval.c */
 713 extern int EGET; /* eval.c */
 714 extern struct flags flag;
 715 extern short opponent, computer, INCscore;
 716 extern short WAwindow, BAwindow, WBwindow, BBwindow;
 717 extern short dither, player;
 718 extern short xwndw, contempt;
 719 extern long  ResponseTime, ExtraTime, TCleft,
 720     MaxResponseTime, et, et0, time0, ft;
 721 extern int   TCcount;
 722
 723 #ifdef INTERRUPT_TEST
 724 extern long itime0, it;
 725 #endif
 726
 727 extern long  reminus, replus;
 728 extern long  GenCnt, NodeCnt, ETnodes, EvalNodes, HashAdd, HashCnt,
 729     HashCol, THashCol, FHashCnt, FHashAdd;
 730 extern short HashDepth, HashMoveLimit;
 731 extern struct GameRec  *GameList;
 732 extern short GameCnt, Game50;
 733 extern short Sdepth, MaxSearchDepth;
 734 extern int   Book;
 735 extern struct TimeControlRec TimeControl;
 736 extern int   TCadd;
 737 extern short TCflag, TCmoves, TCminutes, TCseconds, OperatorTime;
 738 extern int   timecomp[MINGAMEIN], timeopp[MINGAMEIN];
 739 extern int   compptr, oppptr;
 740 extern short XCmore, XCmoves[], XCminutes[], XCseconds[], XC;
 741 extern const short otherside[];
 742 extern const small_short Stboard[];
 743 extern const small_short Stcolor[];
 744 extern unsigned short hint;
 745 extern short TOflag;
 746 extern short stage, stage2;
 747
 748 #define in_opening_stage    (!flag.tsume && (stage < 33))
 749 #define in_middlegame_stage (!flag.tsume && (stage >= 33) && (stage <= 66))
 750 #define in_endgame_stage    (flag.tsume || (stage > 66))
 751
 752 extern short ahead, hash;
 753 extern short balance[2];
 754 extern small_short ChkFlag[], CptrFlag[], TesujiFlag[];
 755 extern short Pscore[], Tscore[];
 756 extern /*unsigned*/ short rehash;  /* -1 is used as a flag --tpm */
 757 extern unsigned int ttbllimit;
 758 extern unsigned int TTadd;
 759 extern unsigned int ttblsize;
 760 extern short mtl[], hung[];
 761 extern small_short Pindex[];
 762 extern small_short PieceCnt[];
 763 extern short FROMsquare, TOsquare;
 764 extern small_short HasPiece[2][NO_PIECES];
 765 extern const short kingP[];
 766 extern unsigned short killr0[], killr1[];
 767 extern unsigned short killr2[], killr3[];
 768 extern unsigned short PrVar[MAXDEPTH];
 769 extern unsigned short PV, SwagHt, Swag0, Swag1, Swag2, Swag3, Swag4, sidebit;
 770 extern short mtl[2], pmtl[2], hung[2];
 771 extern const small_short relative_value[];
 772 extern const long control[];
 773 extern small_short diagonal(short delta);
 774 extern const small_short promoted[NO_PIECES], unpromoted[NO_PIECES];
 775 extern const small_short is_promoted[NO_PIECES];
 776
 777 typedef unsigned char next_array[NO_SQUARES][NO_SQUARES];
 778 typedef small_short distdata_array[NO_SQUARES][NO_SQUARES];
 779
 780 extern const small_short inunmap[NO_SQUARES];
 781 #ifndef MINISHOGI
 782 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 4)];
 783 #else
 784 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 2)];
 785 #endif
 786
 787 #if defined SAVE_NEXTPOS
 788 extern const small_short direc[NO_PTYPE_PIECES][8];
 789 extern short first_direction(short ptyp, short *d, short sq);
 790 extern short next_direction(short ptyp, short *d, short sq);
 791 extern short next_position(short ptyp, short *d, short sq, short u);
 792 #else
 793 extern short use_nextpos;
 794 extern next_array  *nextpos[NO_PTYPE_PIECES];
 795 extern next_array  *nextdir[NO_PTYPE_PIECES];
 796 #endif
 797
 798 extern value_array   *value;
 799 extern fscore_array  *fscore;
 800
 801 #ifndef SAVE_DISTDATA
 802 extern short use_distdata;
 803 extern distdata_array  *distdata;
 804 #endif
 805
 806 #ifndef SAVE_PTYPE_DISTDATA
 807 extern short use_ptype_distdata;
 808 extern distdata_array  *ptype_distdata[NO_PTYPE_PIECES];
 809 #endif
 810
 811 extern const small_short ptype[2][NO_PIECES];
 812
 813 extern long filesz, hashmask, hashbase;
 814 extern FILE *hashfile;
 815 extern unsigned int starttime;
 816
 817 /* eval.c */
 818 typedef small_short Mpiece_array[2][NO_SQUARES];
 819 extern Mpiece_array *Mpiece[NO_PIECES];
 820 extern short ADVNCM[NO_PIECES];
 821
 822 #define computed_distance(a, b) \
 823     ((abs(column(a) - column(b)) > abs(row(a) - row(b))) \
 824     ? abs(column(a) - column(b)) : abs(row(a) - row(b)))
 825
 826 extern short distance(short a, short b);
 827 extern short ptype_distance(short ptyp, short f, short t);
 828 extern short piece_distance(short side, short piece, short f, short t);
 829
 830 #if defined UNKNOWN
 831 #  undef UNKNOWN
 832 #endif
 833
 834 #define UNKNOWN      'U'
 835 #define STATIC_ROOK  'S'
 836 #define RANGING_ROOK 'R'
 837
 838 extern char GameType[2];
 839 void ShowGameType(void);
 840
 841 extern unsigned short bookmaxply;
 842 extern unsigned int bookcount;
 843 extern unsigned int booksize;
 844 extern unsigned long hashkey, hashbd;
 845
 846 typedef struct hashval hashcode_array[2][NO_PIECES][NO_SQUARES];
 847 typedef struct hashval drop_hashcode_array[2][NO_PIECES][NO_SQUARES];
 848
 849 extern hashcode_array  *hashcode;
 850 extern drop_hashcode_array  *drop_hashcode;
 851
 852 #ifdef QUIETBACKGROUND
 853 extern short background;
 854 #endif /* QUIETBACKGROUND */
 855
 856 #if ttblsz
 857 extern short use_ttable;
 858 extern struct hashentry  *ttable[2];
 859 #endif
 860
 861 /*
 862  * hashbd contains a 32 bit "signature" of the board position. hashkey
 863  * contains a 16 bit code used to address the hash table. When a move is
 864  * made, XOR'ing the hashcode of moved piece on the from and to squares with
 865  * the hashbd and hashkey values keeps things current.
 866  */
 867
 868 #define UpdateHashbd(side, piece, f, t) \
 869 { \
 870   if ((f) >= 0) \
 871     { \
 872       hashbd  ^= (*hashcode)[side][piece][f].bd;  \
 873       hashkey ^= (*hashcode)[side][piece][f].key; \
 874     } \
 875  \
 876   if ((t) >= 0) \
 877     { \
 878       hashbd  ^= (*hashcode)[side][piece][t].bd;  \
 879       hashkey ^= (*hashcode)[side][piece][t].key; \
 880     } \
 881 }
 882
 883 #define UpdateDropHashbd(side, piece, count) \
 884 { \
 885   hashbd  ^= (*drop_hashcode)[side][piece][count].bd;  \
 886   hashkey ^= (*drop_hashcode)[side][piece][count].key; \
 887 }
 888
 889
 890 extern short rpthash[2][256];
 891 extern char *DRAW;
 892
 893 extern char* DRAW_REPETITION;
 894 extern char *DRAW_MAXMOVES;
 895 extern char *DRAW_JUSTDRAW;
 896
 897 #define row(a)     ((a) / NO_COLS)
 898 #define column(a)  ((a) % NO_COLS)
 899 #define locn(a, b) (((a) * NO_COLS) + b)
 900
 901 /* init external functions */
 902 extern void InitConst(char *lang); /* init.c */
 903 extern int  Initialize_data(void); /* init.c */
 904 extern void Free_data(void);       /* init.c */
 905 extern int  Lock_data(void);       /* init.c */
 906 extern void Unlock_data(void);     /* init.c */
 907 extern void Initialize_dist(void); /* init.c */
 908 extern void Initialize_eval(void); /* eval.c */
 909 extern void NewGame(void);
 910 extern void GetOpenings(void);
 911 extern int  OpeningBook(unsigned short *hint);
 912
 913 typedef enum
 914 {
 915     REMOVE_PIECE = 1, ADD_PIECE
 916 } UpdatePieceList_mode;
 917
 918 extern void
 919 UpdatePieceList(short side, short sq, UpdatePieceList_mode iop);
 920
 921 typedef enum
 922 {
 923     FOREGROUND_MODE = 1, BACKGROUND_MODE
 924 } SelectMove_mode;
 925
 926 extern void
 927 SelectMove(short side, SelectMove_mode iop);
 928
 929 extern int
 930 search(short side,
 931        short ply,
 932        short depth,
 933        short alpha,
 934        short beta,
 935        unsigned short *bstline,
 936        short *rpt);
 937
 938 #ifdef CACHE
 939 void PutInEETable(short side, int score);
 940 int  CheckEETable(short side);
 941 int  ProbeEETable(short side, short *score);
 942 #endif
 943
 944 #if ttblsz
 945 extern int
 946 ProbeTTable(short side,
 947             short depth,
 948             short ply,
 949             short *alpha,
 950             short *beta,
 951             short *score);
 952
 953 extern int
 954 PutInTTable(short side,
 955             short score,
 956             short depth,
 957             short ply,
 958             short beta,
 959             unsigned short mv);
 960
 961 extern void ZeroTTable(void);
 962 extern void ZeroRPT(void);
 963 extern void Initialize_ttable(void);
 964 extern unsigned int urand(void);
 965
 966 #  ifdef HASHFILE
 967 extern void gsrand(unsigned int);
 968
 969 extern int
 970 ProbeFTable(short side,
 971             short depth,
 972             short ply,
 973             short *alpha,
 974             short *beta,
 975             short *score);
 976
 977 extern void
 978 PutInFTable(short side,
 979             short score,
 980             short depth,
 981             short ply,
 982             short alpha,
 983             short beta,
 984             unsigned short f,
 985             unsigned short t);
 986
 987 #  endif /* HASHFILE */
 988 #endif /* ttblsz */
 989
 990 #if !defined SAVE_NEXTPOS
 991 extern void Initialize_moves(void);
 992 #endif
 993
 994 extern short generate_move_flags;
 995
 996 extern void MoveList(short side, short ply,
 997                      short in_check, short blockable);
 998 extern void CaptureList(short side, short ply,
 999                         short in_check, short blockable);
1000
1001 /* from attacks.c */
1002 extern int
1003 SqAttacked(short square, short side, short *blockable);
1004
1005 extern void
1006 MakeMove(short side,
1007          struct leaf  *node,
1008          short *tempb,
1009          short *tempc,
1010          short *tempsf,
1011          short *tempst,
1012          short *INCscore);
1013
1014 extern void
1015 UnmakeMove(short side,
1016            struct leaf  *node,
1017            short *tempb,
1018            short *tempc,
1019            short *tempsf,
1020            short *tempst);
1021
1022 extern void
1023 InitializeStats(void);
1024
1025 extern int
1026 evaluate(short side,
1027          short ply,
1028          short alpha,
1029          short beta,
1030          short INCscore,
1031          short *InChk,
1032          short *blockable);
1033
1034 extern short ScorePosition(short side);
1035 extern void  ExaminePosition(short side);
1036 extern short ScorePatternDistance(short side);
1037 extern void  DetermineStage(short side);
1038 extern void  UpdateWeights(short side);
1039 extern int   InitMain(void);
1040 extern void  ExitMain(void);
1041 extern void  Initialize(void);
1042 extern void  InputCommand(char *command);
1043 extern void  ExitShogi(void);
1044 extern void  ClearScreen(void);
1045 extern void  SetTimeControl(void);
1046 extern void  SelectLevel(char *sx);
1047
1048 extern void
1049 UpdateDisplay(short f,
1050               short t,
1051               short flag,
1052               short iscastle);
1053
1054 typedef enum
1055 {
1056     COMPUTE_AND_INIT_MODE = 1, COMPUTE_MODE
1057 #ifdef INTERRUPT_TEST
1058     , INIT_INTERRUPT_MODE, COMPUTE_INTERRUPT_MODE
1059 #endif
1060 } ElapsedTime_mode;
1061
1062 extern void  SetResponseTime(short side);
1063 extern void  CheckForTimeout(int score, int globalscore,
1064                              int Jscore, int zwndw);
1065 extern void  ShowSidetoMove(void);
1066 extern void  ShowResponseTime(void);
1067 extern void  ShowPatternCount(short side, short n);
1068 extern void  SearchStartStuff(short side);
1069 extern void  ShowDepth(char ch);
1070 extern void  TerminateSearch(int);
1071 extern void  ShowResults(short score, unsigned short *bstline, char ch);
1072 extern void  SetupBoard(void);
1073 extern void  algbr(short f, short t, short flags);
1074 extern void  OutputMove(void);
1075 extern void  ShowCurrentMove(short pnt, short f, short t);
1076 extern void  ListGame(void);
1077 extern void  ShowMessage(char *s, ...);
1078 extern void  ClearScreen(void);
1079 extern void  DoDebug(void);
1080 extern void  DoTable(short table[NO_SQUARES]);
1081 extern void  ShowPostnValues(void);
1082 extern void  ChangeXwindow(void);
1083 extern void  SetContempt(void);
1084 extern void  ChangeHashDepth(void);
1085 extern void  ChangeBetaWindow(void);
1086 extern void  GiveHint(void);
1087 extern void  ShowPrompt(void);
1088 extern void  EditBoard(void);
1089 extern void  help(void);
1090 extern void  ChangeSearchDepth(void);
1091 extern void  skip(void);
1092 extern void  skipb(void);
1093 extern void  EnPassant(short xside, short f, short t, short iop);
1094 extern void  ShowNodeCnt(long NodeCnt);
1095 extern void  ShowLine(unsigned short *bstline);
1096 extern int   pick(short p1, short p2);
1097 extern short repetition(void);
1098 extern void  TimeCalc(void);
1099 extern void  ElapsedTime(ElapsedTime_mode iop);
1100
1101 extern short
1102 IsCheckmate(short side, short in_check,
1103             short blockable); /* genmoves.c */
1104
1105
1106 typedef enum
1107 {
1108     VERIFY_AND_MAKE_MODE, VERIFY_AND_TRY_MODE, UNMAKE_MODE
1109 } VerifyMove_mode;
1110
1111 extern int VerifyMove(char *s, VerifyMove_mode iop, unsigned short *mv);
1112 extern unsigned short TTage;
1113
1114 /* display driver framework */
1115
1116 struct display
1117 {
1118     void (*ChangeAlphaWindow)(void);
1119     void (*ChangeBetaWindow)(void);
1120     void (*ChangeHashDepth)(void);
1121     void (*ChangeSearchDepth)(char *sx);
1122     void (*ChangeXwindow)(void);
1123     void (*ClearScreen)(void);
1124     void (*DoDebug)(void);
1125     void (*DoTable)(short table[NO_SQUARES]);
1126     void (*EditBoard)(void);
1127     void (*ExitShogi)(void);
1128     void (*GiveHint)(void);
1129     void (*Initialize)(void);
1130     void (*ShowNodeCnt)(long NodeCnt);
1131     void (*OutputMove)(void);
1132     void (*PollForInput)(void);
1133     void (*SetContempt)(void);
1134     void (*SearchStartStuff)(short side);
1135     void (*SelectLevel)(char *sx);
1136     void (*ShowCurrentMove)(short pnt, short f, short t);
1137     void (*ShowDepth)(char ch);
1138     void (*ShowGameType)(void);
1139     void (*ShowLine)(unsigned short *bstline);
1140     void (*ShowMessage)(char *s, ...);
1141     void (*AlwaysShowMessage)(const char *format, ...);
1142     void (*Printf)(const char *format, ...);
1143     void (*doRequestInputString)(const char* fmt, char* buffer);
1144     int  (*GetString)(char* sx);
1145     void (*SetupBoard)(void);
1146     void (*ShowPatternCount)(short side, short n);
1147     void (*ShowPostnValue)(short sq);
1148     void (*ShowPostnValues)(void);
1149     void (*ShowPrompt)(void);
1150     void (*ShowResponseTime)(void);
1151     void (*ShowResults)(short score, unsigned short *bstline, char ch);
1152     void (*ShowSidetoMove)(void);
1153     void (*ShowStage)(void);
1154     void (*TerminateSearch)(int sig);
1155     void (*UpdateClocks)(void);
1156     void (*UpdateDisplay)(short f, short t, short redraw, short isspec);
1157     void (*help)(void);
1158 };
1159
1160 extern struct display *dsp;
1161
1162 extern struct display raw_display;
1163 extern struct display curses_display;
1164
1165 #endif /* _GNUSHOGI_H_ */