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 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
 186 #if defined HASHFILE || defined CACHE
 187 #  define PTBLBDSIZE (NO_SQUARES + NO_PIECES)
 188 #endif
 189
 190 #include "eval.h"
 191
 192 #define SCORE_LIMIT 12000
 193
 194 /* masks into upper 16 bits of attacks array */
 195 /* observe order of relative piece values */
 196 #define CNT_MASK 0x000000FF
 197 #define ctlP  0x00200000
 198 #define ctlPp 0x00100000
 199 #define ctlL  0x00080000
 200 #define ctlN  0x00040000
 201 #define ctlLp 0x00020000
 202 #define ctlNp 0x00010000
 203 #define ctlS  0x00008000
 204 #define ctlSp 0x00004000
 205 #define ctlG  0x00002000
 206 #define ctlB  0x00001000
 207 #define ctlBp 0x00000800
 208 #define ctlR  0x00000400
 209 #define ctlRp 0x00000200
 210 #define ctlK  0x00000100
 211
 212 /* attack functions */
 213 #define Pattack(c, u)   (attack[c][u] > ctlP)
 214 #define Anyattack(c, u) (attack[c][u] != 0)
 215
 216 /* hashtable flags */
 217 #define truescore   0x0001
 218 #define lowerbound  0x0002
 219 #define upperbound  0x0004
 220 #define kingcastle  0x0008
 221 #define queencastle 0x0010
 222 #define evalflag    0x0020
 223
 224 /* King positions */
 225 #define BlackKing PieceList[black][0]
 226 #define WhiteKing PieceList[white][0]
 227 #define OwnKing   PieceList[c1][0]
 228 #define EnemyKing PieceList[c2][0]
 229
 230
 231 /* board properties */
 232 #ifndef MINISHOGI
 233 #define InBlackCamp(sq) ((sq) < 27)
 234 #define InWhiteCamp(sq) ((sq) > 53)
 235 #else
 236 #define InBlackCamp(sq) ((sq) < 5)
 237 #define InWhiteCamp(sq) ((sq) > 19)
 238 #endif
 239 #define InPromotionZone(side, sq) \
 240 (((side) == black) ? InWhiteCamp(sq) : InBlackCamp(sq))
 241
 242 /* constants */
 243 /* FIXME ? */
 244 #define OPENING_HINT 0x141d /* P7g-7f (20->29) */
 245
 246 /* truth values */
 247 #ifndef false
 248 #define false 0
 249 #endif
 250
 251 #ifndef true
 252 #define true  1
 253 #endif
 254
 255 /* colors */
 256 #define black   0
 257 #define white   1
 258 #define neutral 2
 259
 260 /* piece code defines */
 261 enum {
 262     no_piece = 0,
 263     pawn,
 264 #ifndef MINISHOGI
 265     lance,
 266     knight,
 267 #endif
 268     /* start of pieces that can be dropped at any square */
 269     silver,
 270     gold,
 271     bishop,
 272     rook,
 273     ppawn,
 274 #ifndef MINISHOGI
 275     plance,
 276     pknight,
 277 #endif
 278     psilver,
 279     pbishop,
 280     prook,
 281     king
 282 };
 283
 284 /* move types */
 285 enum {
 286     ptype_no_piece = 0,
 287     ptype_pawn = 0,
 288 #ifndef MINISHOGI
 289     ptype_lance,
 290     ptype_knight,
 291 #endif
 292     ptype_silver,
 293     ptype_gold,
 294     ptype_bishop,
 295     ptype_rook,
 296     ptype_pbishop,
 297     ptype_prook,
 298     ptype_king,
 299     ptype_wpawn,
 300 #ifndef MINISHOGI
 301     ptype_wlance,
 302     ptype_wknight,
 303 #endif
 304     ptype_wsilver,
 305     ptype_wgold
 306 };
 307
 308 /* node flags */
 309 #define pmask        0x000f /*    15 */
 310 #define promote      0x0010 /*    16 */
 311 #define dropmask     0x0020 /*    32 */
 312 #define exact        0x0040 /*    64 */
 313 #define tesuji       0x0080 /*   128 */
 314 #define check        0x0100 /*   256 */
 315 #define capture      0x0200 /*   512 */
 316 #define draw         0x0400 /*  1024 */
 317 #define stupid       0x0800 /*  2048 */
 318 #define questionable 0x1000 /*  4096 */
 319 #define kingattack   0x2000 /*  8192 */
 320 #define book         0x4000 /* 16384 */
 321
 322 /* move quality flags */
 323 #define goodmove     tesuji
 324 #define badmove      stupid
 325 #ifdef EASY_OPENINGS
 326 #define difficult    questionable
 327 #endif
 328
 329 /* move symbols */
 330 #ifndef MINISHOGI
 331 #define pxx (" PLNSGBRPLNSBRK ")
 332 #define qxx (" plnsgbrplnsbrk ")
 333 #define rxx ("ihgfedcba")
 334 #define cxx ("987654321")
 335 #else
 336 #define pxx (" PSGBRPSBRK ")
 337 #define qxx (" psgbrpsbrk ")
 338 #define rxx ("edcba")
 339 #define cxx ("54321")
 340 #endif
 341
 342 /***************** Table limits ********************************************/
 343
 344 /*
 345  * ttblsz must be a power of 2. Setting ttblsz 0 removes the transposition
 346  * tables.
 347  */
 348
 349 #if defined NOTTABLE
 350 #  define vttblsz 0
 351 #elif defined SMALL_MEMORY
 352 #  if defined SAVE_SSCORE
 353 #    define vttblsz (1 << 12)
 354 #  else
 355 #    if defined EXTRA_2MB
 356 #      define vttblsz (1 << 12)
 357 #    else
 358 #      define vttblsz (1 << 10)
 359 #    endif
 360 #  endif
 361 #else
 362 #  define vttblsz (100001)
 363 #endif
 364
 365 #if defined SMALL_MEMORY
 366 #  define MINTTABLE (0)
 367 #else
 368 #  define MINTTABLE (8000)    /* min ttable size -1 */
 369 #endif
 370
 371 #define ttblsz vttblsz
 372
 373 #if defined SMALL_MEMORY
 374 #  if !defined SAVE_SSCORE
 375 #    define TREE 1500             /* max number of tree entries */
 376 #  else
 377 #    define TREE 2500             /* max number of tree entries */
 378 #  endif
 379 #else
 380 #  define TREE 4000               /* max number of tree entries */
 381 #endif
 382
 383 #define MAXDEPTH  40            /* max depth a search can be carried */
 384 #define MINDEPTH   2            /* min search depth =1 (no hint), >1 hint */
 385 #define MAXMOVES 300            /* max number of half moves in a game */
 386 #define CPSIZE   241            /* size of lang file max */
 387
 388 #if defined SMALL_MEMORY
 389 #  if defined SAVE_SSCORE
 390 #    define ETABLE (1 << 10)      /* static eval cache */
 391 #  else
 392 #    if defined EXTRA_2MB
 393 #      define ETABLE (1 << 10)    /* static eval cache */
 394 #    else
 395 #      define ETABLE (1 << 8)     /* static eval cache */
 396 #    endif
 397 #  endif
 398 #else
 399 #  define ETABLE (10001)          /* static eval cache */
 400 #endif
 401
 402 /***************** tuning paramaters *******************/
 403
 404 #if defined VERY_SLOW_CPU
 405 #  define MINRESPONSETIME 300
 406 #elif defined SLOW_CPU
 407 #  define MINRESPONSETIME 200
 408 #else
 409 #  define MINRESPONSETIME 100     /* 1 s */
 410 #endif
 411
 412 #define MINGAMEIN  4
 413 #define MINMOVES  15
 414 #define CHKDEPTH   1   /* always look forward CHKDEPTH
 415                         * half-moves if in check */
 416
 417 #if defined SLOW_CPU || defined VERY_SLOW_CPU
 418 #  define DEPTHBEYOND 7     /* Max to go beyond Sdepth */
 419 #else
 420 #  define DEPTHBEYOND 11    /* Max to go beyond Sdepth */
 421 #endif
 422
 423 #define HASHDEPTH      4  /* depth above which to use HashFile */
 424 #define HASHMOVELIMIT 40  /* Use HashFile only for this many moves */
 425 #define PTVALUE        0  /* material value below which pawn threats at
 426                            * 5 & 3 are used */
 427 #define ZDEPTH 3          /* depth beyond which to check
 428                            * ZDELTA for extra time */
 429 #define ZDELTA 10         /* score delta per ply to cause
 430                            * extra time to be given */
 431 #define BESTDELTA 90
 432
 433 /* about 1/2 second worth of nodes for your machine */
 434 #if defined VERY_SLOW_CPU
 435 /* check the time every ZNODES positions */
 436 #  define ZNODES (flag.tsume ? 20 : 50)
 437 #elif defined SLOW_CPU
 438 #  define ZNODES (flag.tsume ? 40 : 100)
 439 #else
 440 #  define ZNODES (flag.tsume ? 400 : 1000)
 441 #endif
 442
 443 #define MAXTCCOUNTX  10  /* max number of time clicks
 444                           * per search to complete ply */
 445 #define MAXTCCOUNTR   4  /* max number of time clicks
 446                           * per search extensions*/
 447 #define SCORESPLIM    8  /* Score space doesn't apply after this stage */
 448 #define SDEPTHLIM    (Sdepth + 1)
 449 #define HISTORYLIM 4096  /* Max value of history killer */
 450
 451 #ifdef EXACTHISTORY
 452 #  if defined SMALL_MEMORY
 453 #    define HISTORY_MASK 0x8000     /* mask to MSB of history index */
 454 #    define HISTORY_SIZE 0x10000    /* size of history table */
 455 #  else
 456 #    define HISTORY_MASK (1 << 15)  /* mask to MSB of history index */
 457 #    define HISTORY_SIZE (1 << 16)  /* size of history table */
 458 #  endif
 459 #else
 460 /* smaller history table, but dangerous because of collisions */
 461 #  define HISTORY_MASK 0x3fff     /* mask to significant bits
 462                                    * of history index */
 463 #  if defined SMALL_MEMORY
 464 #    define HISTORY_SIZE 0x4000 /* size of history table */
 465 #  else
 466 #    define HISTORY_SIZE (1 << 14)  /* size of history table */
 467 #  endif
 468 #endif
 469
 470 #define sizeof_history (sizeof(unsigned short) * (size_t)HISTORY_SIZE)
 471
 472 #ifdef EXACTHISTORY
 473 /* Map from.to (8bit.8bit) to from.to (0.7bit.8bit) */
 474 #  define khmove(mv) (mv & 0x7fff)
 475 #  define hmove(mv) ((mv & 0x7fff) ^ 0x5555)
 476 #else
 477 /* Map from.to (8bit.8bit) to from.to (00.7bit.7bit) */
 478 /* Swap bits of ToSquare in case of promotions, hoping that
 479    no catastrophic collision occurs. */
 480 #  define khmove(mv) (((mv & 0x7f00) >> 1) | \
 481            ((mv & 0x0080) ? ((mv & 0x007f) ^ 0x007f) : (mv & 0x007f)))
 482 #  define hmove(mv) (khmove(mv) ^ 0x2aaa)
 483 #endif
 484
 485 /* mask color to 15th bit */
 486 #ifdef EXACTHISTORY
 487 #  define hindex(c, mv) ((c ? HISTORY_MASK : 0) | hmove(mv))
 488 #else
 489 /* for white, swap bits, hoping that no catastrophic collision occurs. */
 490 #  define hindex(c, mv) (c ? ((~hmove(mv)) & HISTORY_MASK) : hmove(mv))
 491 #endif
 492
 493 #define EWNDW  10    /* Eval window to force position scoring at depth
 494                       * greater than (Sdepth + 2)        */
 495 #define WAWNDW 90    /* alpha window when computer black */
 496 #define WBWNDW 90    /* beta window when computer black  */
 497 #define BAWNDW 90    /* alpha window when computer white */
 498 #define BBWNDW 90    /* beta window when computer white  */
 499 #define BXWNDW 90    /* window to force position scoring at lower */
 500 #define WXWNDW 90    /* window to force position scoring at lower */
 501
 502 #define DITHER  5    /* max amount random can alter a pos value */
 503 #define LBONUS  1    /* points per stage value of L increases   */
 504 #define BBONUS  2    /* points per stage value of B increases   */
 505 #define RBONUS  2    /* points per stage value of R increases   */
 506
 507 #define QUESTIONABLE (valueK)   /* Penalty for questionable moves. */
 508
 509 #if defined STUPID
 510 #  undef STUPID
 511 #endif
 512
 513 #define STUPID (valueR << 1)    /* Penalty for stupid moves. */
 514
 515 #define KINGPOSLIMIT (-1)      /* King positional scoring limit */
 516 #define KINGSAFETY  32
 517 #define MAXrehash (7)
 518
 519 /******* parameters for Opening Book ****************/
 520
 521 #define BOOKSIZE   8000  /* Number of unique position/move
 522                           * combinations allowed */
 523 #define BOOKMAXPLY   40           /* Max plys to keep in book database */
 524 #define BOOKFAIL (BOOKMAXPLY / 2) /* if no book move found for BOOKFAIL
 525                                    * turns stop using book */
 526 #define BOOKPOCKET          64
 527 #define BOOKRAND          1000  /* used to select an opening move
 528                                  * from a list */
 529 #define BOOKENDPCT         950  /* 5 % chance a BOOKEND will stop the book */
 530 #define DONTUSE         -32760  /* flag move as don't use */
 531 #define ILLEGAL_TRAPPED -32761  /* flag move as illegal:
 532                                  * no move from this square */
 533 #define ILLEGAL_DOUBLED -32762  /* flag move as illegal:
 534                                  * two pawns on one column */
 535 #define ILLEGAL_MATE    -32763  /* flag move as illegal:
 536                                  * pawn drop with mate */
 537
 538 /*****************************************************/
 539
 540 struct hashval
 541 {
 542     unsigned long key, bd;
 543 };
 544
 545 struct hashentry
 546 {
 547     unsigned long hashbd;
 548     unsigned short mv;
 549     unsigned char depth; /* unsigned char saves some space */
 550     unsigned char flags;
 551 #ifdef notdef
 552     unsigned short age;
 553 #endif
 554     short score;
 555 #ifdef HASHTEST
 556     unsigned char bd[PTBLBDSIZE];
 557 #endif /* HASHTEST */
 558 };
 559
 560 #if defined HASHFILE || defined CACHE
 561 struct etable
 562 {
 563     unsigned long ehashbd;
 564     short escore[2];
 565 #if !defined SAVE_SSCORE
 566     short sscore[NO_SQUARES];
 567 #endif
 568     short score;
 569     small_short hung[2];
 570 #ifdef CACHETEST
 571     unsigned char bd[PTBLBDSIZE];
 572 #endif /* CACHETEST */
 573 };
 574
 575 #if defined CACHE
 576 extern short use_etable;
 577 typedef struct etable etable_field[ETABLE];
 578 extern etable_field  *etab[2];
 579 #endif
 580
 581 /*
 582  * CHECKME! Is this valid?
 583  *
 584  * persistent transposition table. By default, the size is (1 << vfilesz).
 585  * If you change the size, be sure to run gnushogi -c [vfilesz]
 586  * before anything else.
 587  */
 588
 589 #define frehash 6
 590
 591 #if defined SMALL_MEMORY
 592 #  define vfilesz 10
 593 #else
 594 #  define vfilesz 14
 595 #endif
 596
 597 struct fileentry
 598 {
 599     unsigned char bd[PTBLBDSIZE];
 600     unsigned char f, t, flags, depth, sh, sl;
 601 };
 602
 603 #endif /* HASHFILE */
 604
 605
 606 struct leaf
 607 {
 608     small_ushort f, t;
 609     short score, reply, width;
 610     short INCscore;
 611     unsigned short flags;
 612 };
 613
 614
 615 struct GameRec
 616 {
 617     unsigned short gmove;    /* this move */
 618     short score;             /* score after this move */
 619     short depth;             /* search depth this move */
 620     long  time;               /* search time this move */
 621     short fpiece;            /* moved or dropped piece */
 622     short piece;             /* piece captured */
 623     short color;             /* color */
 624     short flags;             /* move flags capture, promote, castle */
 625     short Game50;            /* flag for repetition */
 626     long  nodes;              /* nodes searched for this move */
 627     unsigned long hashkey, hashbd;   /* board key before this move */
 628 };
 629
 630
 631 struct TimeControlRec
 632 {
 633     short moves[2];
 634     long  clock[2];
 635 };
 636
 637
 638 struct flags
 639 {
 640     short mate;              /* the game is over */
 641     short post;              /* show principle variation */
 642     short quit;              /* quit/exit */
 643     short regularstart;      /* did the game start from standard
 644                               * initial board ? */
 645     short reverse;           /* reverse board display */
 646     short bothsides;         /* computer plays both sides */
 647     short hash;              /* enable/disable transposition table */
 648     short force;             /* enter moves */
 649     short easy;              /* disable thinking on opponents time */
 650     short beep;              /* enable/disable beep */
 651     short timeout;           /* time to make a move */
 652     short musttimeout;       /* time to make a move */
 653     short back;              /* time to make a move */
 654     short rcptr;             /* enable/disable recapture heuristics */
 655     short rv;                /* reverse video */
 656     short stars;             /* add stars to uxdsp screen */
 657     short coords;            /* add coords to visual screen */
 658     short shade;
 659     short material;          /* draw on lack of material */
 660     short illegal;           /* illegal position */
 661     short onemove;           /* timing is onemove */
 662     short gamein;            /* timing is gamein */
 663     short tsume;             /* first consider checks */
 664 };
 665
 666 extern FILE *debugfile;
 667
 668 #ifndef EVALFILE
 669 #define EVALFILE "/tmp/EVAL"
 670 #endif
 671
 672 extern FILE *debug_eval_file;
 673 extern short debug_moves;
 674
 675
 676 #ifdef HISTORY
 677 extern short use_history;
 678 extern unsigned short  *history;
 679 #endif
 680
 681 extern long znodes;
 682
 683 extern char ColorStr[2][10];
 684
 685 extern char mvstr[4][6];
 686 extern unsigned short MV[MAXDEPTH];
 687 extern int MSCORE;
 688 extern int mycnt1, mycnt2;
 689 extern short ahead;
 690 extern struct leaf rootnode;
 691 extern struct leaf  *Tree;
 692 extern struct leaf  *root;
 693 extern char savefile[], listfile[];
 694 extern short TrPnt[];
 695 extern small_short board[], color[];
 696 extern const small_short sweep[NO_PIECES];
 697 extern small_short PieceList[2][NO_SQUARES], PawnCnt[2][NO_COLS];
 698 extern small_short Captured[2][NO_PIECES];
 699
 700 #ifndef HAVE_MEMSET
 701 #  define ClearCaptured() \
 702   { \
 703       short piece, color; \
 704       for (color = black; color <= white; color++) \
 705           for (piece = 0; piece < NO_PIECES; piece++) \
 706               Captured[color][piece] = 0; \
 707   }
 708 #else
 709 #  define ClearCaptured() \
 710   memset((char *)Captured, 0, (unsigned long)sizeof(Captured))
 711 #endif /* HAVE_MEMSET */
 712
 713 extern small_short Mvboard[];
 714
 715 #if !defined SAVE_SVALUE
 716 extern short svalue[NO_SQUARES];
 717 #endif
 718
 719 extern short pscore[2]; /* eval.c */
 720 extern int EADD; /* eval.c */
 721 extern int EGET; /* eval.c */
 722 extern struct flags flag;
 723 extern short opponent, computer, INCscore;
 724 extern short WAwindow, BAwindow, WBwindow, BBwindow;
 725 extern short dither, player;
 726 extern short xwndw, contempt;
 727 extern long  ResponseTime, ExtraTime, TCleft,
 728     MaxResponseTime, et, et0, time0, ft;
 729 extern int   TCcount;
 730
 731 #ifdef INTERRUPT_TEST
 732 extern long itime0, it;
 733 #endif
 734
 735 extern long  reminus, replus;
 736 extern long  GenCnt, NodeCnt, ETnodes, EvalNodes, HashAdd, HashCnt,
 737     HashCol, THashCol, FHashCnt, FHashAdd;
 738 extern short HashDepth, HashMoveLimit;
 739 extern struct GameRec  *GameList;
 740 extern short GameCnt, Game50;
 741 extern short Sdepth, MaxSearchDepth;
 742 extern int   Book;
 743 extern struct TimeControlRec TimeControl;
 744 extern int   TCadd;
 745 extern short TCflag, TCmoves, TCminutes, TCseconds, OperatorTime;
 746 extern int   timecomp[MINGAMEIN], timeopp[MINGAMEIN];
 747 extern int   compptr, oppptr;
 748 extern short XCmore, XCmoves[], XCminutes[], XCseconds[], XC;
 749 extern const short otherside[];
 750 extern const small_short Stboard[];
 751 extern const small_short Stcolor[];
 752 extern unsigned short hint;
 753 extern short TOflag;
 754 extern short stage, stage2;
 755
 756 #define in_opening_stage    (!flag.tsume && (stage < 33))
 757 #define in_middlegame_stage (!flag.tsume && (stage >= 33) && (stage <= 66))
 758 #define in_endgame_stage    (flag.tsume || (stage > 66))
 759
 760 extern short ahead, hash;
 761 extern short balance[2];
 762 extern small_short ChkFlag[], CptrFlag[], TesujiFlag[];
 763 extern short Pscore[], Tscore[];
 764 extern /*unsigned*/ short rehash;  /* -1 is used as a flag --tpm */
 765 extern unsigned int ttbllimit;
 766 extern unsigned int TTadd;
 767 extern unsigned int ttblsize;
 768 extern short mtl[], hung[];
 769 extern small_short Pindex[];
 770 extern small_short PieceCnt[];
 771 extern short FROMsquare, TOsquare;
 772 extern small_short HasPiece[2][NO_PIECES];
 773 extern const short kingP[];
 774 extern unsigned short killr0[], killr1[];
 775 extern unsigned short killr2[], killr3[];
 776 extern unsigned short PrVar[MAXDEPTH];
 777 extern unsigned short PV, SwagHt, Swag0, Swag1, Swag2, Swag3, Swag4, sidebit;
 778 extern short mtl[2], pmtl[2], hung[2];
 779 extern const small_short relative_value[];
 780 extern const long control[];
 781 extern small_short diagonal(short delta);
 782 extern const small_short promoted[NO_PIECES], unpromoted[NO_PIECES];
 783 extern const small_short is_promoted[NO_PIECES];
 784
 785 typedef unsigned char next_array[NO_SQUARES][NO_SQUARES];
 786 typedef small_short distdata_array[NO_SQUARES][NO_SQUARES];
 787
 788 extern const small_short inunmap[NO_SQUARES];
 789 #ifndef MINISHOGI
 790 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 4)];
 791 #else
 792 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 2)];
 793 #endif
 794
 795 #if defined SAVE_NEXTPOS
 796 extern const small_short direc[NO_PTYPE_PIECES][8];
 797 extern short first_direction(short ptyp, short *d, short sq);
 798 extern short next_direction(short ptyp, short *d, short sq);
 799 extern short next_position(short ptyp, short *d, short sq, short u);
 800 #else
 801 extern short use_nextpos;
 802 extern next_array  *nextpos[NO_PTYPE_PIECES];
 803 extern next_array  *nextdir[NO_PTYPE_PIECES];
 804 #endif
 805
 806 extern value_array   *value;
 807 extern fscore_array  *fscore;
 808
 809 #ifndef SAVE_DISTDATA
 810 extern short use_distdata;
 811 extern distdata_array  *distdata;
 812 #endif
 813
 814 #ifndef SAVE_PTYPE_DISTDATA
 815 extern short use_ptype_distdata;
 816 extern distdata_array  *ptype_distdata[NO_PTYPE_PIECES];
 817 #endif
 818
 819 extern const small_short ptype[2][NO_PIECES];
 820
 821 extern long filesz, hashmask, hashbase;
 822 extern FILE *hashfile;
 823 extern unsigned int starttime;
 824
 825 /* eval.c */
 826 typedef small_short Mpiece_array[2][NO_SQUARES];
 827 extern Mpiece_array *Mpiece[NO_PIECES];
 828 extern short ADVNCM[NO_PIECES];
 829
 830 #define computed_distance(a, b) \
 831     ((abs(column(a) - column(b)) > abs(row(a) - row(b))) \
 832     ? abs(column(a) - column(b)) : abs(row(a) - row(b)))
 833
 834 extern short distance(short a, short b);
 835 extern short ptype_distance(short ptyp, short f, short t);
 836 extern short piece_distance(short side, short piece, short f, short t);
 837
 838 #if defined UNKNOWN
 839 #  undef UNKNOWN
 840 #endif
 841
 842 #define UNKNOWN      'U'
 843 #define STATIC_ROOK  'S'
 844 #define RANGING_ROOK 'R'
 845
 846 extern char GameType[2];
 847 void ShowGameType(void);
 848
 849 extern unsigned short bookmaxply;
 850 extern unsigned int bookcount;
 851 extern unsigned int booksize;
 852 extern unsigned long hashkey, hashbd;
 853
 854 typedef struct hashval hashcode_array[2][NO_PIECES][NO_SQUARES];
 855 typedef struct hashval drop_hashcode_array[2][NO_PIECES][NO_SQUARES];
 856
 857 extern hashcode_array  *hashcode;
 858 extern drop_hashcode_array  *drop_hashcode;
 859
 860 #ifdef QUIETBACKGROUND
 861 extern short background;
 862 #endif /* QUIETBACKGROUND */
 863
 864 #if ttblsz
 865 extern short use_ttable;
 866 extern struct hashentry  *ttable[2];
 867 #endif
 868
 869 /*
 870  * hashbd contains a 32 bit "signature" of the board position. hashkey
 871  * contains a 16 bit code used to address the hash table. When a move is
 872  * made, XOR'ing the hashcode of moved piece on the from and to squares with
 873  * the hashbd and hashkey values keeps things current.
 874  */
 875
 876 #define UpdateHashbd(side, piece, f, t) \
 877 { \
 878   if ((f) >= 0) \
 879     { \
 880       hashbd  ^= (*hashcode)[side][piece][f].bd;  \
 881       hashkey ^= (*hashcode)[side][piece][f].key; \
 882     } \
 883  \
 884   if ((t) >= 0) \
 885     { \
 886       hashbd  ^= (*hashcode)[side][piece][t].bd;  \
 887       hashkey ^= (*hashcode)[side][piece][t].key; \
 888     } \
 889 }
 890
 891 #define UpdateDropHashbd(side, piece, count) \
 892 { \
 893   hashbd  ^= (*drop_hashcode)[side][piece][count].bd;  \
 894   hashkey ^= (*drop_hashcode)[side][piece][count].key; \
 895 }
 896
 897
 898 extern short rpthash[2][256];
 899 extern char *DRAW;
 900
 901 extern char* DRAW_REPETITION;
 902 extern char *DRAW_MAXMOVES;
 903 extern char *DRAW_JUSTDRAW;
 904
 905 #define row(a)     ((a) / NO_COLS)
 906 #define column(a)  ((a) % NO_COLS)
 907 #define locn(a, b) (((a) * NO_COLS) + b)
 908
 909 /* init external functions */
 910 extern void InitConst(char *lang); /* init.c */
 911 extern int  Initialize_data(void); /* init.c */
 912 extern void Free_data(void);       /* init.c */
 913 extern int  Lock_data(void);       /* init.c */
 914 extern void Unlock_data(void);     /* init.c */
 915 extern void Initialize_dist(void); /* init.c */
 916 extern void Initialize_eval(void); /* eval.c */
 917 extern void NewGame(void);
 918 extern void GetOpenings(void);
 919 extern int  OpeningBook(unsigned short *hint);
 920
 921 typedef enum
 922 {
 923     REMOVE_PIECE = 1, ADD_PIECE
 924 } UpdatePieceList_mode;
 925
 926 extern void
 927 UpdatePieceList(short side, short sq, UpdatePieceList_mode iop);
 928
 929 typedef enum
 930 {
 931     FOREGROUND_MODE = 1, BACKGROUND_MODE
 932 } SelectMove_mode;
 933
 934 extern void
 935 SelectMove(short side, SelectMove_mode iop);
 936
 937 extern int
 938 search(short side,
 939        short ply,
 940        short depth,
 941        short alpha,
 942        short beta,
 943        unsigned short *bstline,
 944        short *rpt);
 945
 946 #ifdef CACHE
 947 void PutInEETable(short side, int score);
 948 int  CheckEETable(short side);
 949 int  ProbeEETable(short side, short *score);
 950 #endif
 951
 952 #if ttblsz
 953 extern int
 954 ProbeTTable(short side,
 955             short depth,
 956             short ply,
 957             short *alpha,
 958             short *beta,
 959             short *score);
 960
 961 extern int
 962 PutInTTable(short side,
 963             short score,
 964             short depth,
 965             short ply,
 966             short beta,
 967             unsigned short mv);
 968
 969 extern void ZeroTTable(void);
 970 extern void ZeroRPT(void);
 971 extern void Initialize_ttable(void);
 972 extern unsigned int urand(void);
 973
 974 #  ifdef HASHFILE
 975 extern void gsrand(unsigned int);
 976
 977 extern int
 978 ProbeFTable(short side,
 979             short depth,
 980             short ply,
 981             short *alpha,
 982             short *beta,
 983             short *score);
 984
 985 extern void
 986 PutInFTable(short side,
 987             short score,
 988             short depth,
 989             short ply,
 990             short alpha,
 991             short beta,
 992             unsigned short f,
 993             unsigned short t);
 994
 995 #  endif /* HASHFILE */
 996 #endif /* ttblsz */
 997
 998 #if !defined SAVE_NEXTPOS
 999 extern void Initialize_moves(void);
1000 #endif
1001
1002 extern short generate_move_flags;
1003
1004 extern void MoveList(short side, short ply,
1005                      short in_check, short blockable);
1006 extern void CaptureList(short side, short ply,
1007                         short in_check, short blockable);
1008
1009 /* from attacks.c */
1010 extern int
1011 SqAttacked(short square, short side, short *blockable);
1012
1013 extern void
1014 MakeMove(short side,
1015          struct leaf  *node,
1016          short *tempb,
1017          short *tempc,
1018          short *tempsf,
1019          short *tempst,
1020          short *INCscore);
1021
1022 extern void
1023 UnmakeMove(short side,
1024            struct leaf  *node,
1025            short *tempb,
1026            short *tempc,
1027            short *tempsf,
1028            short *tempst);
1029
1030 extern void
1031 InitializeStats(void);
1032
1033 extern int
1034 evaluate(short side,
1035          short ply,
1036          short alpha,
1037          short beta,
1038          short INCscore,
1039          short *InChk,
1040          short *blockable);
1041
1042 extern short ScorePosition(short side);
1043 extern void  ExaminePosition(short side);
1044 extern short ScorePatternDistance(short side);
1045 extern void  DetermineStage(short side);
1046 extern void  UpdateWeights(short side);
1047 extern int   InitMain(void);
1048 extern void  ExitMain(void);
1049 extern void  Initialize(void);
1050 extern void  InputCommand(char *command);
1051 extern void  ExitShogi(void);
1052 extern void  ClearScreen(void);
1053 extern void  SetTimeControl(void);
1054 extern void  SelectLevel(char *sx);
1055
1056 extern void
1057 UpdateDisplay(short f,
1058               short t,
1059               short flag,
1060               short iscastle);
1061
1062 typedef enum
1063 {
1064     COMPUTE_AND_INIT_MODE = 1, COMPUTE_MODE
1065 #ifdef INTERRUPT_TEST
1066     , INIT_INTERRUPT_MODE, COMPUTE_INTERRUPT_MODE
1067 #endif
1068 } ElapsedTime_mode;
1069
1070 extern void  SetResponseTime(short side);
1071 extern void  CheckForTimeout(int score, int globalscore,
1072                              int Jscore, int zwndw);
1073 extern void  ShowSidetoMove(void);
1074 extern void  ShowResponseTime(void);
1075 extern void  ShowPatternCount(short side, short n);
1076 extern void  SearchStartStuff(short side);
1077 extern void  ShowDepth(char ch);
1078 extern void  TerminateSearch(int);
1079 extern void  ShowResults(short score, unsigned short *bstline, char ch);
1080 extern void  SetupBoard(void);
1081 extern void  algbr(short f, short t, short flag);
1082 extern void  OutputMove(void);
1083 extern void  ShowCurrentMove(short pnt, short f, short t);
1084 extern void  ListGame(void);
1085 extern void  ShowMessage(char *s);
1086 extern void  ClearScreen(void);
1087 extern void  DoDebug(void);
1088 extern void  DoTable(short table[NO_SQUARES]);
1089 extern void  ShowPostnValues(void);
1090 extern void  ChangeXwindow(void);
1091 extern void  SetContempt(void);
1092 extern void  ChangeHashDepth(void);
1093 extern void  ChangeBetaWindow(void);
1094 extern void  GiveHint(void);
1095 extern void  ShowPrompt(void);
1096 extern void  EditBoard(void);
1097 extern void  help(void);
1098 extern void  ChangeSearchDepth(void);
1099 extern void  skip(void);
1100 extern void  skipb(void);
1101 extern void  EnPassant(short xside, short f, short t, short iop);
1102 extern void  ShowNodeCnt(long NodeCnt);
1103 extern void  ShowLine(unsigned short *bstline);
1104 extern int   pick(short p1, short p2);
1105 extern short repetition(void);
1106 extern void  TimeCalc(void);
1107 extern void  ElapsedTime(ElapsedTime_mode iop);
1108
1109 extern short
1110 DropPossible(short piece, short side, short sq); /* genmoves.c */
1111
1112 extern short
1113 IsCheckmate(short side, short in_check,
1114             short blockable); /* genmoves.c */
1115
1116
1117 typedef enum
1118 {
1119     VERIFY_AND_MAKE_MODE, VERIFY_AND_TRY_MODE, UNMAKE_MODE
1120 } VerifyMove_mode;
1121
1122 extern int VerifyMove(char *s, VerifyMove_mode iop, unsigned short *mv);
1123 extern unsigned short TTage;
1124
1125 /* display driver framework */
1126
1127 struct display
1128 {
1129     void (*ChangeAlphaWindow)(void);
1130     void (*ChangeBetaWindow)(void);
1131     void (*ChangeHashDepth)(void);
1132     void (*ChangeSearchDepth)(char *sx);
1133     void (*ChangeXwindow)(void);
1134     void (*ClearScreen)(void);
1135     void (*DoDebug)(void);
1136     void (*DoTable)(short table[NO_SQUARES]);
1137     void (*EditBoard)(void);
1138     void (*ExitShogi)(void);
1139     void (*GiveHint)(void);
1140     void (*Initialize)(void);
1141     void (*ShowNodeCnt)(long NodeCnt);
1142     void (*OutputMove)(void);
1143     void (*PollForInput)(void);
1144     void (*SetContempt)(void);
1145     void (*SearchStartStuff)(short side);
1146     void (*SelectLevel)(char *sx);
1147     void (*ShowCurrentMove)(short pnt, short f, short t);
1148     void (*ShowDepth)(char ch);
1149     void (*ShowGameType)(void);
1150     void (*ShowLine)(unsigned short *bstline);
1151     void (*ShowMessage)(char *s);
1152     void (*AlwaysShowMessage)(const char *format, ...);
1153     void (*Printf)(const char *format, ...);
1154     void (*doRequestInputString)(const char* fmt, char* buffer);
1155     int  (*GetString)(char* sx);
1156     void (*SetupBoard)(void);
1157     void (*ShowPatternCount)(short side, short n);
1158     void (*ShowPostnValue)(short sq);
1159     void (*ShowPostnValues)(void);
1160     void (*ShowPrompt)(void);
1161     void (*ShowResponseTime)(void);
1162     void (*ShowResults)(short score, unsigned short *bstline, char ch);
1163     void (*ShowSidetoMove)(void);
1164     void (*ShowStage)(void);
1165     void (*TerminateSearch)(int sig);
1166     void (*UpdateClocks)(void);
1167     void (*UpdateDisplay)(short f, short t, short redraw, short isspec);
1168     void (*help)(void);
1169 };
1170
1171 extern struct display *dsp;
1172
1173 extern struct display raw_display;
1174 extern struct display curses_display;
1175
1176 #endif /* _GNUSHOGI_H_ */