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 /*
  48  * Display options.
  49  */
  50
  51 typedef enum {
  52   DISPLAY_RAW,
  53 #ifdef HAVE_LIBCURSES
  54   DISPLAY_CURSES,
  55 #endif
  56   DISPLAY_X
  57 } display_t;
  58 extern display_t display_type;
  59
  60 #define XSHOGI     (display_type == DISPLAY_X)
  61 #define NOT_CURSES ((display_type == DISPLAY_X) \
  62   || (display_type == DISPLAY_RAW))
  63
  64
  65 /* Miscellaneous globals. */
  66
  67 extern short hard_time_limit; /* If you exceed time limit, you lose.   */
  68 extern short barebones;       /* Don't print of stats for x interface. */
  69 extern short nolist;          /* Don't list game after exit.           */
  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 short ahead;
 160 extern char  *xwin;
 161 extern char  *Lang;
 162 extern void movealgbr(short m, char *s);
 163
 164
 165 #define SEEK_SET 0
 166 #define SEEK_END 2
 167
 168 #ifdef MINISHOGI
 169 #define NO_PIECES       11
 170 #define MAX_CAPTURED    19
 171 #define NO_PTYPE_PIECES 11
 172 #define NO_COLS          5
 173 #define NO_ROWS          5
 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 #endif
 181 #define NO_SQUARES      (NO_COLS*NO_ROWS)
 182
 183 #define ROW_NAME(n) ('a' + NO_ROWS - 1 - n)
 184 #define COL_NAME(n) ('1' + NO_COLS - 1 - n)
 185 #define ROW_NUM(c) ('a' + NO_ROWS - 1 - c)
 186 #define COL_NUM(c) ('1' + NO_COLS - 1 - c)
 187
 188 #if defined HASHFILE || defined CACHE
 189 #  define PTBLBDSIZE (NO_SQUARES + NO_PIECES)
 190 #endif
 191
 192 #include "eval.h"
 193
 194 #define SCORE_LIMIT 12000
 195
 196 /* masks into upper 16 bits of attacks array */
 197 /* observe order of relative piece values */
 198 #define CNT_MASK 0x000000FF
 199 #define ctlP  0x00200000
 200 #define ctlPp 0x00100000
 201 #define ctlL  0x00080000
 202 #define ctlN  0x00040000
 203 #define ctlLp 0x00020000
 204 #define ctlNp 0x00010000
 205 #define ctlS  0x00008000
 206 #define ctlSp 0x00004000
 207 #define ctlG  0x00002000
 208 #define ctlB  0x00001000
 209 #define ctlBp 0x00000800
 210 #define ctlR  0x00000400
 211 #define ctlRp 0x00000200
 212 #define ctlK  0x00000100
 213
 214 /* attack functions */
 215 #define Pattack(c, u)   (attack[c][u] > ctlP)
 216 #define Anyattack(c, u) (attack[c][u] != 0)
 217
 218 /* hashtable flags */
 219 #define truescore   0x0001
 220 #define lowerbound  0x0002
 221 #define upperbound  0x0004
 222 #define kingcastle  0x0008
 223 #define queencastle 0x0010
 224 #define evalflag    0x0020
 225
 226 /* King positions */
 227 #define BlackKing PieceList[black][0]
 228 #define WhiteKing PieceList[white][0]
 229 #define OwnKing   PieceList[c1][0]
 230 #define EnemyKing PieceList[c2][0]
 231
 232
 233 /* board properties */
 234 #ifndef MINISHOGI
 235 #define InBlackCamp(sq) ((sq) < 27)
 236 #define InWhiteCamp(sq) ((sq) > 53)
 237 #else
 238 #define InBlackCamp(sq) ((sq) < 5)
 239 #define InWhiteCamp(sq) ((sq) > 19)
 240 #endif
 241 #define InPromotionZone(side, sq) \
 242 (((side) == black) ? InWhiteCamp(sq) : InBlackCamp(sq))
 243
 244 /* constants */
 245 /* FIXME ? */
 246 #define OPENING_HINT 0x141d /* P7g-7f (20->29) */
 247
 248 /* truth values */
 249 #ifndef false
 250 #define false 0
 251 #endif
 252
 253 #ifndef true
 254 #define true  1
 255 #endif
 256
 257 /* colors */
 258 #define black   0
 259 #define white   1
 260 #define neutral 2
 261
 262 /* piece code defines */
 263 enum {
 264     no_piece = 0,
 265     pawn,
 266 #ifndef MINISHOGI
 267     lance,
 268     knight,
 269 #endif
 270     /* start of pieces that can be dropped at any square */
 271     silver,
 272     gold,
 273     bishop,
 274     rook,
 275     ppawn,
 276 #ifndef MINISHOGI
 277     plance,
 278     pknight,
 279 #endif
 280     psilver,
 281     pbishop,
 282     prook,
 283     king
 284 };
 285
 286 /* move types */
 287 enum {
 288     ptype_no_piece = 0,
 289     ptype_pawn = 0,
 290 #ifndef MINISHOGI
 291     ptype_lance,
 292     ptype_knight,
 293 #endif
 294     ptype_silver,
 295     ptype_gold,
 296     ptype_bishop,
 297     ptype_rook,
 298     ptype_pbishop,
 299     ptype_prook,
 300     ptype_king,
 301     ptype_wpawn,
 302 #ifndef MINISHOGI
 303     ptype_wlance,
 304     ptype_wknight,
 305 #endif
 306     ptype_wsilver,
 307     ptype_wgold
 308 };
 309
 310 /* node flags */
 311 #define pmask        0x000f /*    15 */
 312 #define promote      0x0010 /*    16 */
 313 #define dropmask     0x0020 /*    32 */
 314 #define exact        0x0040 /*    64 */
 315 #define tesuji       0x0080 /*   128 */
 316 #define check        0x0100 /*   256 */
 317 #define capture      0x0200 /*   512 */
 318 #define draw         0x0400 /*  1024 */
 319 #define stupid       0x0800 /*  2048 */
 320 #define questionable 0x1000 /*  4096 */
 321 #define kingattack   0x2000 /*  8192 */
 322 #define book         0x4000 /* 16384 */
 323
 324 /* move quality flags */
 325 #define goodmove     tesuji
 326 #define badmove      stupid
 327 #ifdef EASY_OPENINGS
 328 #define difficult    questionable
 329 #endif
 330
 331 /* move symbols */
 332 #ifndef MINISHOGI
 333 #define pxx (" PLNSGBRPLNSBRK ")
 334 #define qxx (" plnsgbrplnsbrk ")
 335 #define rxx ("ihgfedcba")
 336 #define cxx ("987654321")
 337 #else
 338 #define pxx (" PSGBRPSBRK ")
 339 #define qxx (" psgbrpsbrk ")
 340 #define rxx ("edcba")
 341 #define cxx ("54321")
 342 #endif
 343
 344 /***************** Table limits ********************************************/
 345
 346 /*
 347  * ttblsz must be a power of 2. Setting ttblsz 0 removes the transposition
 348  * tables.
 349  */
 350
 351 #if defined NOTTABLE
 352 #  define vttblsz 0
 353 #elif defined SMALL_MEMORY
 354 #  if defined SAVE_SSCORE
 355 #    define vttblsz (1 << 12)
 356 #  else
 357 #    if defined EXTRA_2MB
 358 #      define vttblsz (1 << 12)
 359 #    else
 360 #      define vttblsz (1 << 10)
 361 #    endif
 362 #  endif
 363 #else
 364 #  define vttblsz (100001)
 365 #endif
 366
 367 #if defined SMALL_MEMORY
 368 #  define MINTTABLE (0)
 369 #else
 370 #  define MINTTABLE (8000)    /* min ttable size -1 */
 371 #endif
 372
 373 #define ttblsz vttblsz
 374
 375 #if defined SMALL_MEMORY
 376 #  if !defined SAVE_SSCORE
 377 #    define TREE 1500             /* max number of tree entries */
 378 #  else
 379 #    define TREE 2500             /* max number of tree entries */
 380 #  endif
 381 #else
 382 #  define TREE 4000               /* max number of tree entries */
 383 #endif
 384
 385 #define MAXDEPTH  40            /* max depth a search can be carried */
 386 #define MINDEPTH   2            /* min search depth =1 (no hint), >1 hint */
 387 #define MAXMOVES 300            /* max number of half moves in a game */
 388 #define CPSIZE   241            /* size of lang file max */
 389
 390 #if defined SMALL_MEMORY
 391 #  if defined SAVE_SSCORE
 392 #    define ETABLE (1 << 10)      /* static eval cache */
 393 #  else
 394 #    if defined EXTRA_2MB
 395 #      define ETABLE (1 << 10)    /* static eval cache */
 396 #    else
 397 #      define ETABLE (1 << 8)     /* static eval cache */
 398 #    endif
 399 #  endif
 400 #else
 401 #  define ETABLE (10001)          /* static eval cache */
 402 #endif
 403
 404 /***************** tuning paramaters *******************/
 405
 406 #if defined VERY_SLOW_CPU
 407 #  define MINRESPONSETIME 300
 408 #elif defined SLOW_CPU
 409 #  define MINRESPONSETIME 200
 410 #else
 411 #  define MINRESPONSETIME 100     /* 1 s */
 412 #endif
 413
 414 #define MINGAMEIN  4
 415 #define MINMOVES  15
 416 #define CHKDEPTH   1   /* always look forward CHKDEPTH
 417                         * half-moves if in check */
 418
 419 #if defined SLOW_CPU || defined VERY_SLOW_CPU
 420 #  define DEPTHBEYOND 7     /* Max to go beyond Sdepth */
 421 #else
 422 #  define DEPTHBEYOND 11    /* Max to go beyond Sdepth */
 423 #endif
 424
 425 #define HASHDEPTH      4  /* depth above which to use HashFile */
 426 #define HASHMOVELIMIT 40  /* Use HashFile only for this many moves */
 427 #define PTVALUE        0  /* material value below which pawn threats at
 428                            * 5 & 3 are used */
 429 #define ZDEPTH 3          /* depth beyond which to check
 430                            * ZDELTA for extra time */
 431 #define ZDELTA 10         /* score delta per ply to cause
 432                            * extra time to be given */
 433 #define BESTDELTA 90
 434
 435 /* about 1/2 second worth of nodes for your machine */
 436 #if defined VERY_SLOW_CPU
 437 /* check the time every ZNODES positions */
 438 #  define ZNODES (flag.tsume ? 20 : 50)
 439 #elif defined SLOW_CPU
 440 #  define ZNODES (flag.tsume ? 40 : 100)
 441 #else
 442 #  define ZNODES (flag.tsume ? 400 : 1000)
 443 #endif
 444
 445 #define MAXTCCOUNTX  10  /* max number of time clicks
 446                           * per search to complete ply */
 447 #define MAXTCCOUNTR   4  /* max number of time clicks
 448                           * per search extensions*/
 449 #define SCORESPLIM    8  /* Score space doesn't apply after this stage */
 450 #define SDEPTHLIM    (Sdepth + 1)
 451 #define HISTORYLIM 4096  /* Max value of history killer */
 452
 453 #ifdef EXACTHISTORY
 454 #  if defined SMALL_MEMORY
 455 #    define HISTORY_MASK 0x8000     /* mask to MSB of history index */
 456 #    define HISTORY_SIZE 0x10000    /* size of history table */
 457 #  else
 458 #    define HISTORY_MASK (1 << 15)  /* mask to MSB of history index */
 459 #    define HISTORY_SIZE (1 << 16)  /* size of history table */
 460 #  endif
 461 #else
 462 /* smaller history table, but dangerous because of collisions */
 463 #  define HISTORY_MASK 0x3fff     /* mask to significant bits
 464                                    * of history index */
 465 #  if defined SMALL_MEMORY
 466 #    define HISTORY_SIZE 0x4000 /* size of history table */
 467 #  else
 468 #    define HISTORY_SIZE (1 << 14)  /* size of history table */
 469 #  endif
 470 #endif
 471
 472 #define sizeof_history (sizeof(unsigned short) * (size_t)HISTORY_SIZE)
 473
 474 #ifdef EXACTHISTORY
 475 /* Map from.to (8bit.8bit) to from.to (0.7bit.8bit) */
 476 #  define khmove(mv) (mv & 0x7fff)
 477 #  define hmove(mv) ((mv & 0x7fff) ^ 0x5555)
 478 #else
 479 /* Map from.to (8bit.8bit) to from.to (00.7bit.7bit) */
 480 /* Swap bits of ToSquare in case of promotions, hoping that
 481    no catastrophic collision occurs. */
 482 #  define khmove(mv) (((mv & 0x7f00) >> 1) | \
 483            ((mv & 0x0080) ? ((mv & 0x007f) ^ 0x007f) : (mv & 0x007f)))
 484 #  define hmove(mv) (khmove(mv) ^ 0x2aaa)
 485 #endif
 486
 487 /* mask color to 15th bit */
 488 #ifdef EXACTHISTORY
 489 #  define hindex(c, mv) ((c ? HISTORY_MASK : 0) | hmove(mv))
 490 #else
 491 /* for white, swap bits, hoping that no catastrophic collision occurs. */
 492 #  define hindex(c, mv) (c ? ((~hmove(mv)) & HISTORY_MASK) : hmove(mv))
 493 #endif
 494
 495 #define EWNDW  10    /* Eval window to force position scoring at depth
 496                       * greater than (Sdepth + 2)        */
 497 #define WAWNDW 90    /* alpha window when computer black */
 498 #define WBWNDW 90    /* beta window when computer black  */
 499 #define BAWNDW 90    /* alpha window when computer white */
 500 #define BBWNDW 90    /* beta window when computer white  */
 501 #define BXWNDW 90    /* window to force position scoring at lower */
 502 #define WXWNDW 90    /* window to force position scoring at lower */
 503
 504 #define DITHER  5    /* max amount random can alter a pos value */
 505 #define LBONUS  1    /* points per stage value of L increases   */
 506 #define BBONUS  2    /* points per stage value of B increases   */
 507 #define RBONUS  2    /* points per stage value of R increases   */
 508
 509 #define QUESTIONABLE (valueK)   /* Penalty for questionable moves. */
 510
 511 #if defined STUPID
 512 #  undef STUPID
 513 #endif
 514
 515 #define STUPID (valueR << 1)    /* Penalty for stupid moves. */
 516
 517 #define KINGPOSLIMIT (-1)      /* King positional scoring limit */
 518 #define KINGSAFETY  32
 519 #define MAXrehash (7)
 520
 521 /******* parameters for Opening Book ****************/
 522
 523 #define BOOKSIZE   8000  /* Number of unique position/move
 524                           * combinations allowed */
 525 #define BOOKMAXPLY   40           /* Max plys to keep in book database */
 526 #define BOOKFAIL (BOOKMAXPLY / 2) /* if no book move found for BOOKFAIL
 527                                    * turns stop using book */
 528 #define BOOKPOCKET          64
 529 #define BOOKRAND          1000  /* used to select an opening move
 530                                  * from a list */
 531 #define BOOKENDPCT         950  /* 5 % chance a BOOKEND will stop the book */
 532 #define DONTUSE         -32760  /* flag move as don't use */
 533 #define ILLEGAL_TRAPPED -32761  /* flag move as illegal:
 534                                  * no move from this square */
 535 #define ILLEGAL_DOUBLED -32762  /* flag move as illegal:
 536                                  * two pawns on one column */
 537 #define ILLEGAL_MATE    -32763  /* flag move as illegal:
 538                                  * pawn drop with mate */
 539
 540 /*****************************************************/
 541
 542 struct hashval
 543 {
 544     unsigned long key, bd;
 545 };
 546
 547 struct hashentry
 548 {
 549     unsigned long hashbd;
 550     unsigned short mv;
 551     unsigned char depth; /* unsigned char saves some space */
 552     unsigned char flags;
 553 #ifdef notdef
 554     unsigned short age;
 555 #endif
 556     short score;
 557 #ifdef HASHTEST
 558     unsigned char bd[PTBLBDSIZE];
 559 #endif /* HASHTEST */
 560 };
 561
 562 #if defined HASHFILE || defined CACHE
 563 struct etable
 564 {
 565     unsigned long ehashbd;
 566     short escore[2];
 567 #if !defined SAVE_SSCORE
 568     short sscore[NO_SQUARES];
 569 #endif
 570     short score;
 571     small_short hung[2];
 572 #ifdef CACHETEST
 573     unsigned char bd[PTBLBDSIZE];
 574 #endif /* CACHETEST */
 575 };
 576
 577 #if defined CACHE
 578 extern short use_etable;
 579 typedef struct etable etable_field[ETABLE];
 580 extern etable_field  *etab[2];
 581 #endif
 582
 583 /*
 584  * CHECKME! Is this valid?
 585  *
 586  * persistent transposition table. By default, the size is (1 << vfilesz).
 587  * If you change the size, be sure to run gnushogi -c [vfilesz]
 588  * before anything else.
 589  */
 590
 591 #define frehash 6
 592
 593 #if defined SMALL_MEMORY
 594 #  define vfilesz 10
 595 #else
 596 #  define vfilesz 14
 597 #endif
 598
 599 struct fileentry
 600 {
 601     unsigned char bd[PTBLBDSIZE];
 602     unsigned char f, t, flags, depth, sh, sl;
 603 };
 604
 605 #endif /* HASHFILE */
 606
 607
 608 struct leaf
 609 {
 610     small_ushort f, t;
 611     short score, reply, width;
 612     short INCscore;
 613     unsigned short flags;
 614 };
 615
 616
 617 struct GameRec
 618 {
 619     unsigned short gmove;    /* this move */
 620     short score;             /* score after this move */
 621     short depth;             /* search depth this move */
 622     long  time;               /* search time this move */
 623     short fpiece;            /* moved or dropped piece */
 624     short piece;             /* piece captured */
 625     short color;             /* color */
 626     short flags;             /* move flags capture, promote, castle */
 627     short Game50;            /* flag for repetition */
 628     long  nodes;              /* nodes searched for this move */
 629     unsigned long hashkey, hashbd;   /* board key before this move */
 630 };
 631
 632
 633 struct TimeControlRec
 634 {
 635     short moves[2];
 636     long  clock[2];
 637 };
 638
 639
 640 struct flags
 641 {
 642     short mate;              /* the game is over */
 643     short post;              /* show principle variation */
 644     short quit;              /* quit/exit */
 645     short regularstart;      /* did the game start from standard
 646                               * initial board ? */
 647     short reverse;           /* reverse board display */
 648     short bothsides;         /* computer plays both sides */
 649     short hash;              /* enable/disable transposition table */
 650     short force;             /* enter moves */
 651     short easy;              /* disable thinking on opponents time */
 652     short beep;              /* enable/disable beep */
 653     short timeout;           /* time to make a move */
 654     short musttimeout;       /* time to make a move */
 655     short back;              /* time to make a move */
 656     short rcptr;             /* enable/disable recapture heuristics */
 657     short rv;                /* reverse video */
 658     short stars;             /* add stars to uxdsp screen */
 659     short coords;            /* add coords to visual screen */
 660     short shade;
 661     short material;          /* draw on lack of material */
 662     short illegal;           /* illegal position */
 663     short onemove;           /* timing is onemove */
 664     short gamein;            /* timing is gamein */
 665     short tsume;             /* first consider checks */
 666 };
 667
 668 extern FILE *debugfile;
 669
 670 #ifndef EVALFILE
 671 #define EVALFILE "/tmp/EVAL"
 672 #endif
 673
 674 extern FILE *debug_eval_file;
 675 extern short debug_moves;
 676
 677
 678 #ifdef HISTORY
 679 extern short use_history;
 680 extern unsigned short  *history;
 681 #endif
 682
 683 extern long znodes;
 684
 685 extern char ColorStr[2][10];
 686
 687 extern char mvstr[4][6];
 688 extern unsigned short MV[MAXDEPTH];
 689 extern int MSCORE;
 690 extern int mycnt1, mycnt2;
 691 extern short ahead;
 692 extern struct leaf rootnode;
 693 extern struct leaf  *Tree;
 694 extern struct leaf  *root;
 695 extern char savefile[], listfile[];
 696 extern short TrPnt[];
 697 extern small_short board[], color[];
 698 extern const small_short sweep[NO_PIECES];
 699 extern small_short PieceList[2][NO_SQUARES], PawnCnt[2][NO_COLS];
 700 extern small_short Captured[2][NO_PIECES];
 701
 702 #ifndef HAVE_MEMSET
 703 #  define ClearCaptured() \
 704   { \
 705       short piece, color; \
 706       for (color = black; color <= white; color++) \
 707           for (piece = 0; piece < NO_PIECES; piece++) \
 708               Captured[color][piece] = 0; \
 709   }
 710 #else
 711 #  define ClearCaptured() \
 712   memset((char *)Captured, 0, (unsigned long)sizeof(Captured))
 713 #endif /* HAVE_MEMSET */
 714
 715 extern small_short Mvboard[];
 716
 717 #if !defined SAVE_SVALUE
 718 extern short svalue[NO_SQUARES];
 719 #endif
 720
 721 extern short pscore[2]; /* eval.c */
 722 extern int EADD; /* eval.c */
 723 extern int EGET; /* eval.c */
 724 extern struct flags flag;
 725 extern short opponent, computer, INCscore;
 726 extern short WAwindow, BAwindow, WBwindow, BBwindow;
 727 extern short dither, player;
 728 extern short xwndw, contempt;
 729 extern long  ResponseTime, ExtraTime, TCleft,
 730     MaxResponseTime, et, et0, time0, ft;
 731 extern int   TCcount;
 732
 733 #ifdef INTERRUPT_TEST
 734 extern long itime0, it;
 735 #endif
 736
 737 extern long  reminus, replus;
 738 extern long  GenCnt, NodeCnt, ETnodes, EvalNodes, HashAdd, HashCnt,
 739     HashCol, THashCol, FHashCnt, FHashAdd;
 740 extern short HashDepth, HashMoveLimit;
 741 extern struct GameRec  *GameList;
 742 extern short GameCnt, Game50;
 743 extern short Sdepth, MaxSearchDepth;
 744 extern int   Book;
 745 extern struct TimeControlRec TimeControl;
 746 extern int   TCadd;
 747 extern short TCflag, TCmoves, TCminutes, TCseconds, OperatorTime;
 748 extern int   timecomp[MINGAMEIN], timeopp[MINGAMEIN];
 749 extern int   compptr, oppptr;
 750 extern short XCmore, XCmoves[], XCminutes[], XCseconds[], XC;
 751 extern const short otherside[];
 752 extern const small_short Stboard[];
 753 extern const small_short Stcolor[];
 754 extern unsigned short hint;
 755 extern short TOflag;
 756 extern short stage, stage2;
 757
 758 #define in_opening_stage    (!flag.tsume && (stage < 33))
 759 #define in_middlegame_stage (!flag.tsume && (stage >= 33) && (stage <= 66))
 760 #define in_endgame_stage    (flag.tsume || (stage > 66))
 761
 762 extern short ahead, hash;
 763 extern short balance[2];
 764 extern small_short ChkFlag[], CptrFlag[], TesujiFlag[];
 765 extern short Pscore[], Tscore[];
 766 extern /*unsigned*/ short rehash;  /* -1 is used as a flag --tpm */
 767 extern unsigned int ttbllimit;
 768 extern unsigned int TTadd;
 769 extern unsigned int ttblsize;
 770 extern short mtl[], hung[];
 771 extern small_short Pindex[];
 772 extern small_short PieceCnt[];
 773 extern short FROMsquare, TOsquare;
 774 extern small_short HasPiece[2][NO_PIECES];
 775 extern const short kingP[];
 776 extern unsigned short killr0[], killr1[];
 777 extern unsigned short killr2[], killr3[];
 778 extern unsigned short PrVar[MAXDEPTH];
 779 extern unsigned short PV, SwagHt, Swag0, Swag1, Swag2, Swag3, Swag4, sidebit;
 780 extern short mtl[2], pmtl[2], hung[2];
 781 extern const small_short relative_value[];
 782 extern const long control[];
 783 extern small_short diagonal(short delta);
 784 extern const small_short promoted[NO_PIECES], unpromoted[NO_PIECES];
 785 extern const small_short is_promoted[NO_PIECES];
 786
 787 typedef unsigned char next_array[NO_SQUARES][NO_SQUARES];
 788 typedef small_short distdata_array[NO_SQUARES][NO_SQUARES];
 789
 790 extern const small_short inunmap[NO_SQUARES];
 791 #ifndef MINISHOGI
 792 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 4)];
 793 #else
 794 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 2)];
 795 #endif
 796
 797 #if defined SAVE_NEXTPOS
 798 extern const small_short direc[NO_PTYPE_PIECES][8];
 799 extern short first_direction(short ptyp, short *d, short sq);
 800 extern short next_direction(short ptyp, short *d, short sq);
 801 extern short next_position(short ptyp, short *d, short sq, short u);
 802 #else
 803 extern short use_nextpos;
 804 extern next_array  *nextpos[NO_PTYPE_PIECES];
 805 extern next_array  *nextdir[NO_PTYPE_PIECES];
 806 #endif
 807
 808 extern value_array   *value;
 809 extern fscore_array  *fscore;
 810
 811 #ifndef SAVE_DISTDATA
 812 extern short use_distdata;
 813 extern distdata_array  *distdata;
 814 #endif
 815
 816 #ifndef SAVE_PTYPE_DISTDATA
 817 extern short use_ptype_distdata;
 818 extern distdata_array  *ptype_distdata[NO_PTYPE_PIECES];
 819 #endif
 820
 821 extern const small_short ptype[2][NO_PIECES];
 822
 823 extern long filesz, hashmask, hashbase;
 824 extern FILE *hashfile;
 825 extern unsigned int starttime;
 826
 827 /* eval.c */
 828 typedef small_short Mpiece_array[2][NO_SQUARES];
 829 extern Mpiece_array *Mpiece[NO_PIECES];
 830 extern short ADVNCM[NO_PIECES];
 831
 832 #define computed_distance(a, b) \
 833     ((abs(column(a) - column(b)) > abs(row(a) - row(b))) \
 834     ? abs(column(a) - column(b)) : abs(row(a) - row(b)))
 835
 836 extern short distance(short a, short b);
 837 extern short ptype_distance(short ptyp, short f, short t);
 838 extern short piece_distance(short side, short piece, short f, short t);
 839
 840 #if defined UNKNOWN
 841 #  undef UNKNOWN
 842 #endif
 843
 844 #define UNKNOWN      'U'
 845 #define STATIC_ROOK  'S'
 846 #define RANGING_ROOK 'R'
 847
 848 extern char GameType[2];
 849 void ShowGameType(void);
 850
 851 extern unsigned short bookmaxply;
 852 extern unsigned int bookcount;
 853 extern unsigned int booksize;
 854 extern unsigned long hashkey, hashbd;
 855
 856 typedef struct hashval hashcode_array[2][NO_PIECES][NO_SQUARES];
 857 typedef struct hashval drop_hashcode_array[2][NO_PIECES][NO_SQUARES];
 858
 859 extern hashcode_array  *hashcode;
 860 extern drop_hashcode_array  *drop_hashcode;
 861
 862 #ifdef QUIETBACKGROUND
 863 extern short background;
 864 #endif /* QUIETBACKGROUND */
 865
 866 #if ttblsz
 867 extern short use_ttable;
 868 extern struct hashentry  *ttable[2];
 869 #endif
 870
 871 /*
 872  * hashbd contains a 32 bit "signature" of the board position. hashkey
 873  * contains a 16 bit code used to address the hash table. When a move is
 874  * made, XOR'ing the hashcode of moved piece on the from and to squares with
 875  * the hashbd and hashkey values keeps things current.
 876  */
 877
 878 #define UpdateHashbd(side, piece, f, t) \
 879 { \
 880   if ((f) >= 0) \
 881     { \
 882       hashbd  ^= (*hashcode)[side][piece][f].bd;  \
 883       hashkey ^= (*hashcode)[side][piece][f].key; \
 884     } \
 885  \
 886   if ((t) >= 0) \
 887     { \
 888       hashbd  ^= (*hashcode)[side][piece][t].bd;  \
 889       hashkey ^= (*hashcode)[side][piece][t].key; \
 890     } \
 891 }
 892
 893 #define UpdateDropHashbd(side, piece, count) \
 894 { \
 895   hashbd  ^= (*drop_hashcode)[side][piece][count].bd;  \
 896   hashkey ^= (*drop_hashcode)[side][piece][count].key; \
 897 }
 898
 899
 900 extern short rpthash[2][256];
 901 extern char *DRAW;
 902
 903 extern char* DRAW_REPETITION;
 904 extern char *DRAW_MAXMOVES;
 905 extern char *DRAW_JUSTDRAW;
 906
 907 #define row(a)     ((a) / NO_COLS)
 908 #define column(a)  ((a) % NO_COLS)
 909 #define locn(a, b) (((a) * NO_COLS) + b)
 910
 911 /* init external functions */
 912 extern void InitConst(char *lang); /* init.c */
 913 extern int  Initialize_data(void); /* init.c */
 914 extern void Free_data(void);       /* init.c */
 915 extern int  Lock_data(void);       /* init.c */
 916 extern void Unlock_data(void);     /* init.c */
 917 extern void Initialize_dist(void); /* init.c */
 918 extern void Initialize_eval(void); /* eval.c */
 919 extern void NewGame(void);
 920 extern int  parse(FILE * fd, unsigned short *mv,
 921                   short side, char *opening);
 922 extern void GetOpenings(void);
 923 extern int  OpeningBook(unsigned short *hint, short side);
 924
 925 typedef enum
 926 {
 927     REMOVE_PIECE = 1, ADD_PIECE
 928 } UpdatePieceList_mode;
 929
 930 extern void
 931 UpdatePieceList(short side, short sq, UpdatePieceList_mode iop);
 932
 933 typedef enum
 934 {
 935     FOREGROUND_MODE = 1, BACKGROUND_MODE
 936 } SelectMove_mode;
 937
 938 extern void
 939 SelectMove(short side, SelectMove_mode iop);
 940
 941 extern int
 942 search(short side,
 943        short ply,
 944        short depth,
 945        short alpha,
 946        short beta,
 947        unsigned short *bstline,
 948        short *rpt);
 949
 950 #ifdef CACHE
 951 void PutInEETable(short side, int score);
 952 int  CheckEETable(short side);
 953 int  ProbeEETable(short side, short *score);
 954 #endif
 955
 956 #if ttblsz
 957 extern int
 958 ProbeTTable(short side,
 959             short depth,
 960             short ply,
 961             short *alpha,
 962             short *beta,
 963             short *score);
 964
 965 extern int
 966 PutInTTable(short side,
 967             short score,
 968             short depth,
 969             short ply,
 970             short alpha,
 971             short beta,
 972             unsigned short mv);
 973
 974 extern void ZeroTTable(void);
 975 extern void ZeroRPT(void);
 976 extern void Initialize_ttable(void);
 977 extern unsigned int urand(void);
 978
 979 #  ifdef HASHFILE
 980 extern void gsrand(unsigned int);
 981
 982 extern int
 983 ProbeFTable(short side,
 984             short depth,
 985             short ply,
 986             short *alpha,
 987             short *beta,
 988             short *score);
 989
 990 extern void
 991 PutInFTable(short side,
 992             short score,
 993             short depth,
 994             short ply,
 995             short alpha,
 996             short beta,
 997             unsigned short f,
 998             unsigned short t);
 999
1000 #  endif /* HASHFILE */
1001 #endif /* ttblsz */
1002
1003 #if !defined SAVE_NEXTPOS
1004 extern void Initialize_moves(void);
1005 #endif
1006
1007 extern short generate_move_flags;
1008
1009 extern void MoveList(short side, short ply,
1010                      short in_check, short blockable);
1011 extern void CaptureList(short side, short ply,
1012                         short in_check, short blockable);
1013
1014 /* from attacks.c */
1015 extern int
1016 SqAttacked(short square, short side, short *blockable);
1017
1018 extern void
1019 MakeMove(short side,
1020          struct leaf  *node,
1021          short *tempb,
1022          short *tempc,
1023          short *tempsf,
1024          short *tempst,
1025          short *INCscore);
1026
1027 extern void
1028 UnmakeMove(short side,
1029            struct leaf  *node,
1030            short *tempb,
1031            short *tempc,
1032            short *tempsf,
1033            short *tempst);
1034
1035 extern void
1036 InitializeStats(void);
1037
1038 extern int
1039 evaluate(short side,
1040          short ply,
1041          short alpha,
1042          short beta,
1043          short INCscore,
1044          short *InChk,
1045          short *blockable);
1046
1047 extern short ScorePosition(short side);
1048 extern void  ExaminePosition(short side);
1049 extern short ScorePatternDistance(short side);
1050 extern void  DetermineStage(short side);
1051 extern void  UpdateWeights(short side);
1052 extern int   InitMain(void);
1053 extern void  ExitMain(void);
1054 extern void  Initialize(void);
1055 extern void  InputCommand(char *command);
1056 extern void  ExitShogi(void);
1057 extern void  ClearScreen(void);
1058 extern void  SetTimeControl(void);
1059 extern void  SelectLevel(char *sx);
1060
1061 extern void
1062 UpdateDisplay(short f,
1063               short t,
1064               short flag,
1065               short iscastle);
1066
1067 typedef enum
1068 {
1069     COMPUTE_AND_INIT_MODE = 1, COMPUTE_MODE
1070 #ifdef INTERRUPT_TEST
1071     , INIT_INTERRUPT_MODE, COMPUTE_INTERRUPT_MODE
1072 #endif
1073 } ElapsedTime_mode;
1074
1075 extern void  SetResponseTime(short side);
1076 extern void  CheckForTimeout(int score, int globalscore,
1077                              int Jscore, int zwndw);
1078 extern void  ShowSidetoMove(void);
1079 extern void  ShowResponseTime(void);
1080 extern void  ShowPatternCount(short side, short n);
1081 extern void  SearchStartStuff(short side);
1082 extern void  ShowDepth(char ch);
1083 extern void  TerminateSearch(int);
1084 extern void  ShowResults(short score, unsigned short *bstline, char ch);
1085 extern void  SetupBoard(void);
1086 extern void  algbr(short f, short t, short flag);
1087 extern void  OutputMove(void);
1088 extern void  ShowCurrentMove(short pnt, short f, short t);
1089 extern void  ListGame(void);
1090 extern void  ShowMessage(char *s);
1091 extern void  ClearScreen(void);
1092 extern void  DoDebug(void);
1093 extern void  DoTable(short table[NO_SQUARES]);
1094 extern void  ShowPostnValues(void);
1095 extern void  ChangeXwindow(void);
1096 extern void  SetContempt(void);
1097 extern void  ChangeHashDepth(void);
1098 extern void  ChangeBetaWindow(void);
1099 extern void  GiveHint(void);
1100 extern void  ShowPrompt(void);
1101 extern void  EditBoard(void);
1102 extern void  help(void);
1103 extern void  ChangeSearchDepth(void);
1104 extern void  skip(void);
1105 extern void  skipb(void);
1106 extern void  EnPassant(short xside, short f, short t, short iop);
1107 extern void  ShowNodeCnt(long NodeCnt);
1108 extern void  ShowLine(unsigned short *bstline);
1109 extern int   pick(short p1, short p2);
1110 extern short repetition(void);
1111 extern void  TimeCalc(void);
1112 extern void  ElapsedTime(ElapsedTime_mode iop);
1113
1114 extern short
1115 DropPossible(short piece, short side, short sq); /* genmoves.c */
1116
1117 extern short
1118 IsCheckmate(short side, short in_check,
1119             short blockable); /* genmoves.c */
1120
1121
1122 typedef enum
1123 {
1124     VERIFY_AND_MAKE_MODE, VERIFY_AND_TRY_MODE, UNMAKE_MODE
1125 } VerifyMove_mode;
1126
1127 extern int VerifyMove(char *s, VerifyMove_mode iop, unsigned short *mv);
1128 extern unsigned short TTage;
1129
1130 #include "dspwrappers.h"   /* Display functions. */
1131
1132 #endif /* _GNUSHOGI_H_ */