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
  70
  71 /*
  72  * Options for various compilers/OSs.
  73  */
  74
  75 /*
  76  * type small_short must cover -128 .. 127.  In case of trouble,
  77  * try commenting out "signed".  If this doesn't help, use short.
  78  */
  79
  80 #define small_short  signed char
  81 #define small_ushort unsigned char
  82
  83
  84 typedef small_ushort   UBYTE;
  85 typedef short          SHORT;
  86 typedef unsigned short USHORT;
  87 typedef int            INT;
  88 typedef unsigned int   UINT;
  89 typedef long           LONG;
  90 typedef unsigned long  ULONG;
  91
  92
  93 #if !defined(HAVE_MEMCPY) && !defined(HAVE_BCOPY)
  94 #  define array_copy(src, dst, len) \
  95    { \
  96        long i; \
  97        char  *psrc = (char  *)src, *pdst = (char  *)dst; \
  98        for (i = len; i; pdst[--i] = psrc[i]); \
  99    }
 100 #  define array_zero(dst, len) \
 101   { \
 102       long i; \
 103       char  *pdst = (char  *)dst; \
 104       for (i = len; i; pdst[--i] = 0); \
 105   }
 106 #elif !defined(HAVE_MEMCPY)   /* BSD and derivatives */
 107 #  define array_copy(src, dst, len) bcopy(src, dst, len)
 108 #  define array_zero(dst, len)      bzero(dst, len)
 109 #else /* System V and derivatives */
 110 #  define array_copy(src, dst, len) memcpy(dst, src, len)
 111 #  define array_zero(dst, len)      memset(dst, 0, len)
 112 #endif
 113
 114
 115 #ifndef __GNUC__
 116 #  define inline
 117 #endif
 118
 119
 120 /*
 121  * Standard header files.
 122  */
 123
 124 #include <stdio.h>
 125 #include <ctype.h>
 126 #include <stdlib.h>
 127 #include <assert.h>
 128 #include <string.h>
 129
 130 #include <sys/param.h>
 131 #include <sys/types.h>
 132 #ifdef WIN32
 133 #  include <windows.h>
 134 #else
 135    typedef small_short    BYTE;
 136 #  include <sys/times.h>
 137 #  include <sys/ioctl.h>
 138 #endif
 139
 140 #if TIME_WITH_SYS_TIME
 141 #  include <sys/time.h>
 142 #  include <time.h>
 143 #else
 144 #  if HAVE_SYS_TIME_H
 145 #    include <sys/time.h>
 146 #  else
 147 #    include <time.h>
 148 #  endif
 149 #endif
 150
 151 #define RWA_ACC "r+"
 152 #define WA_ACC "w+"
 153 #ifdef BINBOOK
 154 extern char *binbookfile;
 155 #endif
 156
 157 extern char *bookfile;
 158 extern short ahead;
 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) ('a' + NO_ROWS - 1 - n)
 185 #define COL_NAME(n) ('1' + NO_COLS - 1 - n)
 186
 187 #if defined HASHFILE || defined CACHE
 188 #  define PTBLBDSIZE (NO_SQUARES + NO_PIECES)
 189 #endif
 190
 191 #include "eval.h"
 192
 193 #define SCORE_LIMIT 12000
 194
 195 /* masks into upper 16 bits of attacks array */
 196 /* observe order of relative piece values */
 197 #define CNT_MASK 0x000000FF
 198 #define ctlP  0x00200000
 199 #define ctlPp 0x00100000
 200 #define ctlL  0x00080000
 201 #define ctlN  0x00040000
 202 #define ctlLp 0x00020000
 203 #define ctlNp 0x00010000
 204 #define ctlS  0x00008000
 205 #define ctlSp 0x00004000
 206 #define ctlG  0x00002000
 207 #define ctlB  0x00001000
 208 #define ctlBp 0x00000800
 209 #define ctlR  0x00000400
 210 #define ctlRp 0x00000200
 211 #define ctlK  0x00000100
 212
 213 /* attack functions */
 214 #define Pattack(c, u)   (attack[c][u] > ctlP)
 215 #define Anyattack(c, u) (attack[c][u] != 0)
 216
 217 /* hashtable flags */
 218 #define truescore   0x0001
 219 #define lowerbound  0x0002
 220 #define upperbound  0x0004
 221 #define kingcastle  0x0008
 222 #define queencastle 0x0010
 223 #define evalflag    0x0020
 224
 225 /* King positions */
 226 #define BlackKing PieceList[black][0]
 227 #define WhiteKing PieceList[white][0]
 228 #define OwnKing   PieceList[c1][0]
 229 #define EnemyKing PieceList[c2][0]
 230
 231
 232 /* board properties */
 233 #define InBlackCamp(sq) ((sq) < (NO_COLS * NO_CAMP_ROWS))
 234 #define InWhiteCamp(sq) ((sq) >= (NO_COLS * (NO_ROWS - NO_CAMP_ROWS)))
 235 #define InPromotionZone(side, sq) \
 236 (((side) == black) ? InWhiteCamp(sq) : InBlackCamp(sq))
 237
 238 /* constants */
 239 /* FIXME ? */
 240 #define OPENING_HINT 0x141d /* P7g-7f (20->29) */
 241
 242 /* truth values */
 243 #ifndef false
 244 #define false 0
 245 #endif
 246
 247 #ifndef true
 248 #define true  1
 249 #endif
 250
 251 /* colors */
 252 #define black   0
 253 #define white   1
 254 #define neutral 2
 255
 256 /* piece code defines */
 257 enum {
 258     no_piece = 0,
 259     pawn,
 260 #ifndef MINISHOGI
 261     lance,
 262     knight,
 263 #endif
 264     /* start of pieces that can be dropped at any square */
 265     silver,
 266     gold,
 267     bishop,
 268     rook,
 269     ppawn,
 270 #ifndef MINISHOGI
 271     plance,
 272     pknight,
 273 #endif
 274     psilver,
 275     pbishop,
 276     prook,
 277     king
 278 };
 279
 280 /* move types */
 281 enum {
 282     ptype_no_piece = 0,
 283     ptype_pawn = 0,
 284 #ifndef MINISHOGI
 285     ptype_lance,
 286     ptype_knight,
 287 #endif
 288     ptype_silver,
 289     ptype_gold,
 290     ptype_bishop,
 291     ptype_rook,
 292     ptype_pbishop,
 293     ptype_prook,
 294     ptype_king,
 295     ptype_wpawn,
 296 #ifndef MINISHOGI
 297     ptype_wlance,
 298     ptype_wknight,
 299 #endif
 300     ptype_wsilver,
 301     ptype_wgold
 302 };
 303
 304 /* node flags */
 305 #define pmask        0x000f /*    15 */
 306 #define promote      0x0010 /*    16 */
 307 #define dropmask     0x0020 /*    32 */
 308 #define exact        0x0040 /*    64 */
 309 #define tesuji       0x0080 /*   128 */
 310 #define check        0x0100 /*   256 */
 311 #define capture      0x0200 /*   512 */
 312 #define draw         0x0400 /*  1024 */
 313 #define stupid       0x0800 /*  2048 */
 314 #define questionable 0x1000 /*  4096 */
 315 #define kingattack   0x2000 /*  8192 */
 316 #define book         0x4000 /* 16384 */
 317
 318 /* move quality flags */
 319 #define goodmove     tesuji
 320 #define badmove      stupid
 321 #ifdef EASY_OPENINGS
 322 #define difficult    questionable
 323 #endif
 324
 325 /* move symbols */
 326 #ifndef MINISHOGI
 327 #define pxx (" PLNSGBRPLNSBRK ")
 328 #define qxx (" plnsgbrplnsbrk ")
 329 #else
 330 #define pxx (" PSGBRPSBRK ")
 331 #define qxx (" psgbrpsbrk ")
 332 #endif
 333
 334 /***************** Table limits ********************************************/
 335
 336 /*
 337  * ttblsz must be a power of 2. Setting ttblsz 0 removes the transposition
 338  * tables.
 339  */
 340
 341 #if defined NOTTABLE
 342 #  define vttblsz 0
 343 #elif defined SMALL_MEMORY
 344 #  if defined SAVE_SSCORE
 345 #    define vttblsz (1 << 12)
 346 #  else
 347 #    if defined EXTRA_2MB
 348 #      define vttblsz (1 << 12)
 349 #    else
 350 #      define vttblsz (1 << 10)
 351 #    endif
 352 #  endif
 353 #else
 354 #  define vttblsz (100001)
 355 #endif
 356
 357 #if defined SMALL_MEMORY
 358 #  define MINTTABLE (0)
 359 #else
 360 #  define MINTTABLE (8000)    /* min ttable size -1 */
 361 #endif
 362
 363 #define ttblsz vttblsz
 364
 365 #if defined SMALL_MEMORY
 366 #  if !defined SAVE_SSCORE
 367 #    define TREE 1500             /* max number of tree entries */
 368 #  else
 369 #    define TREE 2500             /* max number of tree entries */
 370 #  endif
 371 #else
 372 #  define TREE 4000               /* max number of tree entries */
 373 #endif
 374
 375 #define MAXDEPTH  40            /* max depth a search can be carried */
 376 #define MINDEPTH   2            /* min search depth =1 (no hint), >1 hint */
 377 #define MAXMOVES 300            /* max number of half moves in a game */
 378 #define CPSIZE   241            /* size of lang file max */
 379
 380 #if defined SMALL_MEMORY
 381 #  if defined SAVE_SSCORE
 382 #    define ETABLE (1 << 10)      /* static eval cache */
 383 #  else
 384 #    if defined EXTRA_2MB
 385 #      define ETABLE (1 << 10)    /* static eval cache */
 386 #    else
 387 #      define ETABLE (1 << 8)     /* static eval cache */
 388 #    endif
 389 #  endif
 390 #else
 391 #  define ETABLE (10001)          /* static eval cache */
 392 #endif
 393
 394 /***************** tuning paramaters *******************/
 395
 396 #if defined VERY_SLOW_CPU
 397 #  define MINRESPONSETIME 300
 398 #elif defined SLOW_CPU
 399 #  define MINRESPONSETIME 200
 400 #else
 401 #  define MINRESPONSETIME 100     /* 1 s */
 402 #endif
 403
 404 #define MINGAMEIN  4
 405 #define MINMOVES  15
 406 #define CHKDEPTH   1   /* always look forward CHKDEPTH
 407                         * half-moves if in check */
 408
 409 #if defined SLOW_CPU || defined VERY_SLOW_CPU
 410 #  define DEPTHBEYOND 7     /* Max to go beyond Sdepth */
 411 #else
 412 #  define DEPTHBEYOND 11    /* Max to go beyond Sdepth */
 413 #endif
 414
 415 #define HASHDEPTH      4  /* depth above which to use HashFile */
 416 #define HASHMOVELIMIT 40  /* Use HashFile only for this many moves */
 417 #define PTVALUE        0  /* material value below which pawn threats at
 418                            * 5 & 3 are used */
 419 #define ZDEPTH 3          /* depth beyond which to check
 420                            * ZDELTA for extra time */
 421 #define ZDELTA 10         /* score delta per ply to cause
 422                            * extra time to be given */
 423 #define BESTDELTA 90
 424
 425 /* about 1/2 second worth of nodes for your machine */
 426 #if defined VERY_SLOW_CPU
 427 /* check the time every ZNODES positions */
 428 #  define ZNODES (flag.tsume ? 20 : 50)
 429 #elif defined SLOW_CPU
 430 #  define ZNODES (flag.tsume ? 40 : 100)
 431 #else
 432 #  define ZNODES (flag.tsume ? 400 : 1000)
 433 #endif
 434
 435 #define MAXTCCOUNTX  10  /* max number of time clicks
 436                           * per search to complete ply */
 437 #define MAXTCCOUNTR   4  /* max number of time clicks
 438                           * per search extensions*/
 439 #define SCORESPLIM    8  /* Score space doesn't apply after this stage */
 440 #define SDEPTHLIM    (Sdepth + 1)
 441 #define HISTORYLIM 4096  /* Max value of history killer */
 442
 443 #ifdef EXACTHISTORY
 444 #  if defined SMALL_MEMORY
 445 #    define HISTORY_MASK 0x8000     /* mask to MSB of history index */
 446 #    define HISTORY_SIZE 0x10000    /* size of history table */
 447 #  else
 448 #    define HISTORY_MASK (1 << 15)  /* mask to MSB of history index */
 449 #    define HISTORY_SIZE (1 << 16)  /* size of history table */
 450 #  endif
 451 #else
 452 /* smaller history table, but dangerous because of collisions */
 453 #  define HISTORY_MASK 0x3fff     /* mask to significant bits
 454                                    * of history index */
 455 #  if defined SMALL_MEMORY
 456 #    define HISTORY_SIZE 0x4000 /* size of history table */
 457 #  else
 458 #    define HISTORY_SIZE (1 << 14)  /* size of history table */
 459 #  endif
 460 #endif
 461
 462 #define sizeof_history (sizeof(unsigned short) * (size_t)HISTORY_SIZE)
 463
 464 #ifdef EXACTHISTORY
 465 /* Map from.to (8bit.8bit) to from.to (0.7bit.8bit) */
 466 #  define khmove(mv) (mv & 0x7fff)
 467 #  define hmove(mv) ((mv & 0x7fff) ^ 0x5555)
 468 #else
 469 /* Map from.to (8bit.8bit) to from.to (00.7bit.7bit) */
 470 /* Swap bits of ToSquare in case of promotions, hoping that
 471    no catastrophic collision occurs. */
 472 #  define khmove(mv) (((mv & 0x7f00) >> 1) | \
 473            ((mv & 0x0080) ? ((mv & 0x007f) ^ 0x007f) : (mv & 0x007f)))
 474 #  define hmove(mv) (khmove(mv) ^ 0x2aaa)
 475 #endif
 476
 477 /* mask color to 15th bit */
 478 #ifdef EXACTHISTORY
 479 #  define hindex(c, mv) ((c ? HISTORY_MASK : 0) | hmove(mv))
 480 #else
 481 /* for white, swap bits, hoping that no catastrophic collision occurs. */
 482 #  define hindex(c, mv) (c ? ((~hmove(mv)) & HISTORY_MASK) : hmove(mv))
 483 #endif
 484
 485 #define EWNDW  10    /* Eval window to force position scoring at depth
 486                       * greater than (Sdepth + 2)        */
 487 #define WAWNDW 90    /* alpha window when computer black */
 488 #define WBWNDW 90    /* beta window when computer black  */
 489 #define BAWNDW 90    /* alpha window when computer white */
 490 #define BBWNDW 90    /* beta window when computer white  */
 491 #define BXWNDW 90    /* window to force position scoring at lower */
 492 #define WXWNDW 90    /* window to force position scoring at lower */
 493
 494 #define DITHER  5    /* max amount random can alter a pos value */
 495 #define LBONUS  1    /* points per stage value of L increases   */
 496 #define BBONUS  2    /* points per stage value of B increases   */
 497 #define RBONUS  2    /* points per stage value of R increases   */
 498
 499 #define QUESTIONABLE (valueK)   /* Penalty for questionable moves. */
 500
 501 #if defined STUPID
 502 #  undef STUPID
 503 #endif
 504
 505 #define STUPID (valueR << 1)    /* Penalty for stupid moves. */
 506
 507 #define KINGPOSLIMIT (-1)      /* King positional scoring limit */
 508 #define KINGSAFETY  32
 509 #define MAXrehash (7)
 510
 511 /******* parameters for Opening Book ****************/
 512
 513 #define BOOKSIZE   8000  /* Number of unique position/move
 514                           * combinations allowed */
 515 #define BOOKMAXPLY   40           /* Max plys to keep in book database */
 516 #define BOOKFAIL (BOOKMAXPLY / 2) /* if no book move found for BOOKFAIL
 517                                    * turns stop using book */
 518 #define BOOKPOCKET          64
 519 #define BOOKRAND          1000  /* used to select an opening move
 520                                  * from a list */
 521 #define BOOKENDPCT         950  /* 5 % chance a BOOKEND will stop the book */
 522 #define DONTUSE         -32760  /* flag move as don't use */
 523 #define ILLEGAL_TRAPPED -32761  /* flag move as illegal:
 524                                  * no move from this square */
 525 #define ILLEGAL_DOUBLED -32762  /* flag move as illegal:
 526                                  * two pawns on one column */
 527 #define ILLEGAL_MATE    -32763  /* flag move as illegal:
 528                                  * pawn drop with mate */
 529
 530 /*****************************************************/
 531
 532 struct hashval
 533 {
 534     unsigned long key, bd;
 535 };
 536
 537 struct hashentry
 538 {
 539     unsigned long hashbd;
 540     unsigned short mv;
 541     unsigned char depth; /* unsigned char saves some space */
 542     unsigned char flags;
 543 #ifdef notdef
 544     unsigned short age;
 545 #endif
 546     short score;
 547 #ifdef HASHTEST
 548     unsigned char bd[PTBLBDSIZE];
 549 #endif /* HASHTEST */
 550 };
 551
 552 #if defined HASHFILE || defined CACHE
 553 struct etable
 554 {
 555     unsigned long ehashbd;
 556     short escore[2];
 557 #if !defined SAVE_SSCORE
 558     short sscore[NO_SQUARES];
 559 #endif
 560     short score;
 561     small_short hung[2];
 562 #ifdef CACHETEST
 563     unsigned char bd[PTBLBDSIZE];
 564 #endif /* CACHETEST */
 565 };
 566
 567 #if defined CACHE
 568 extern short use_etable;
 569 typedef struct etable etable_field[ETABLE];
 570 extern etable_field  *etab[2];
 571 #endif
 572
 573 /*
 574  * CHECKME! Is this valid?
 575  *
 576  * persistent transposition table. By default, the size is (1 << vfilesz).
 577  * If you change the size, be sure to run gnushogi -c [vfilesz]
 578  * before anything else.
 579  */
 580
 581 #define frehash 6
 582
 583 #if defined SMALL_MEMORY
 584 #  define vfilesz 10
 585 #else
 586 #  define vfilesz 14
 587 #endif
 588
 589 struct fileentry
 590 {
 591     unsigned char bd[PTBLBDSIZE];
 592     unsigned char f, t, flags, depth, sh, sl;
 593 };
 594
 595 #endif /* HASHFILE */
 596
 597
 598 struct leaf
 599 {
 600     small_ushort f, t;
 601     short score, reply, width;
 602     short INCscore;
 603     unsigned short flags;
 604 };
 605
 606
 607 struct GameRec
 608 {
 609     unsigned short gmove;    /* this move */
 610     short score;             /* score after this move */
 611     short depth;             /* search depth this move */
 612     long  time;               /* search time this move */
 613     short fpiece;            /* moved or dropped piece */
 614     short piece;             /* piece captured */
 615     short color;             /* color */
 616     short flags;             /* move flags capture, promote, castle */
 617     short Game50;            /* flag for repetition */
 618     long  nodes;              /* nodes searched for this move */
 619     unsigned long hashkey, hashbd;   /* board key before this move */
 620 };
 621
 622
 623 struct TimeControlRec
 624 {
 625     short moves[2];
 626     long  clock[2];
 627 };
 628
 629
 630 struct flags
 631 {
 632     short mate;              /* the game is over */
 633     short post;              /* show principle variation */
 634     short quit;              /* quit/exit */
 635     short regularstart;      /* did the game start from standard
 636                               * initial board ? */
 637     short reverse;           /* reverse board display */
 638     short bothsides;         /* computer plays both sides */
 639     short hash;              /* enable/disable transposition table */
 640     short force;             /* enter moves */
 641     short easy;              /* disable thinking on opponents time */
 642     short beep;              /* enable/disable beep */
 643     short timeout;           /* time to make a move */
 644     short musttimeout;       /* time to make a move */
 645     short back;              /* time to make a move */
 646     short rcptr;             /* enable/disable recapture heuristics */
 647     short rv;                /* reverse video */
 648     short stars;             /* add stars to uxdsp screen */
 649     short coords;            /* add coords to visual screen */
 650     short shade;
 651     short material;          /* draw on lack of material */
 652     short illegal;           /* illegal position */
 653     short onemove;           /* timing is onemove */
 654     short gamein;            /* timing is gamein */
 655     short tsume;             /* first consider checks */
 656 };
 657
 658 extern FILE *debugfile;
 659
 660 #ifndef EVALFILE
 661 #define EVALFILE "/tmp/EVAL"
 662 #endif
 663
 664 extern FILE *debug_eval_file;
 665 extern short debug_moves;
 666
 667
 668 #ifdef HISTORY
 669 extern short use_history;
 670 extern unsigned short  *history;
 671 #endif
 672
 673 extern long znodes;
 674
 675 extern char ColorStr[2][10];
 676
 677 extern char mvstr[4][6];
 678 extern int mycnt1, mycnt2;
 679 extern short ahead;
 680 extern struct leaf rootnode;
 681 extern struct leaf  *Tree;
 682 extern struct leaf  *root;
 683 extern char savefile[], listfile[];
 684 extern short TrPnt[];
 685 extern small_short board[], color[];
 686 extern const small_short sweep[NO_PIECES];
 687 extern small_short PieceList[2][NO_SQUARES], PawnCnt[2][NO_COLS];
 688 extern small_short Captured[2][NO_PIECES];
 689
 690 #ifndef HAVE_MEMSET
 691 #  define ClearCaptured() \
 692   { \
 693       short piece, color; \
 694       for (color = black; color <= white; color++) \
 695           for (piece = 0; piece < NO_PIECES; piece++) \
 696               Captured[color][piece] = 0; \
 697   }
 698 #else
 699 #  define ClearCaptured() \
 700   memset((char *)Captured, 0, (unsigned long)sizeof(Captured))
 701 #endif /* HAVE_MEMSET */
 702
 703 extern small_short Mvboard[];
 704
 705 #if !defined SAVE_SVALUE
 706 extern short svalue[NO_SQUARES];
 707 #endif
 708
 709 extern short pscore[2]; /* eval.c */
 710 extern int EADD; /* eval.c */
 711 extern int EGET; /* eval.c */
 712 extern struct flags flag;
 713 extern short opponent, computer, INCscore;
 714 extern short WAwindow, BAwindow, WBwindow, BBwindow;
 715 extern short dither, player;
 716 extern short xwndw, contempt;
 717 extern long  ResponseTime, ExtraTime, TCleft,
 718     MaxResponseTime, et, et0, time0, ft;
 719 extern int   TCcount;
 720
 721 #ifdef INTERRUPT_TEST
 722 extern long itime0, it;
 723 #endif
 724
 725 extern long  reminus, replus;
 726 extern long  GenCnt, NodeCnt, ETnodes, EvalNodes, HashAdd, HashCnt,
 727     HashCol, THashCol, FHashCnt, FHashAdd;
 728 extern short HashDepth, HashMoveLimit;
 729 extern struct GameRec  *GameList;
 730 extern short GameCnt, Game50;
 731 extern short Sdepth, MaxSearchDepth;
 732 extern int   Book;
 733 extern struct TimeControlRec TimeControl;
 734 extern int   TCadd;
 735 extern short TCflag, TCmoves, TCminutes, TCseconds, OperatorTime;
 736 extern int   timecomp[MINGAMEIN], timeopp[MINGAMEIN];
 737 extern int   compptr, oppptr;
 738 extern short XCmore, XCmoves[], XCminutes[], XCseconds[], XC;
 739 extern const short otherside[];
 740 extern const small_short Stboard[];
 741 extern const small_short Stcolor[];
 742 extern unsigned short hint;
 743 extern short TOflag;
 744 extern short stage, stage2;
 745
 746 #define in_opening_stage    (!flag.tsume && (stage < 33))
 747 #define in_middlegame_stage (!flag.tsume && (stage >= 33) && (stage <= 66))
 748 #define in_endgame_stage    (flag.tsume || (stage > 66))
 749
 750 extern short ahead, hash;
 751 extern short balance[2];
 752 extern small_short ChkFlag[], CptrFlag[], TesujiFlag[];
 753 extern short Pscore[], Tscore[];
 754 extern /*unsigned*/ short rehash;  /* -1 is used as a flag --tpm */
 755 extern unsigned int ttbllimit;
 756 extern unsigned int TTadd;
 757 extern unsigned int ttblsize;
 758 extern short mtl[], hung[];
 759 extern small_short Pindex[];
 760 extern small_short PieceCnt[];
 761 extern short FROMsquare, TOsquare;
 762 extern small_short HasPiece[2][NO_PIECES];
 763 extern const short kingP[];
 764 extern unsigned short killr0[], killr1[];
 765 extern unsigned short killr2[], killr3[];
 766 extern unsigned short PrVar[MAXDEPTH];
 767 extern unsigned short PV, SwagHt, Swag0, Swag1, Swag2, Swag3, Swag4, sidebit;
 768 extern short mtl[2], pmtl[2], hung[2];
 769 extern const small_short relative_value[];
 770 extern const long control[];
 771 extern small_short diagonal(short delta);
 772 extern const small_short promoted[NO_PIECES], unpromoted[NO_PIECES];
 773 extern const small_short is_promoted[NO_PIECES];
 774
 775 typedef unsigned char next_array[NO_SQUARES][NO_SQUARES];
 776 typedef small_short distdata_array[NO_SQUARES][NO_SQUARES];
 777
 778 extern const small_short inunmap[NO_SQUARES];
 779 #ifndef MINISHOGI
 780 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 4)];
 781 #else
 782 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 2)];
 783 #endif
 784
 785 #if defined SAVE_NEXTPOS
 786 extern const small_short direc[NO_PTYPE_PIECES][8];
 787 extern short first_direction(short ptyp, short *d, short sq);
 788 extern short next_direction(short ptyp, short *d, short sq);
 789 extern short next_position(short ptyp, short *d, short sq, short u);
 790 #else
 791 extern short use_nextpos;
 792 extern next_array  *nextpos[NO_PTYPE_PIECES];
 793 extern next_array  *nextdir[NO_PTYPE_PIECES];
 794 #endif
 795
 796 extern value_array   *value;
 797 extern fscore_array  *fscore;
 798
 799 #ifndef SAVE_DISTDATA
 800 extern short use_distdata;
 801 extern distdata_array  *distdata;
 802 #endif
 803
 804 #ifndef SAVE_PTYPE_DISTDATA
 805 extern short use_ptype_distdata;
 806 extern distdata_array  *ptype_distdata[NO_PTYPE_PIECES];
 807 #endif
 808
 809 extern const small_short ptype[2][NO_PIECES];
 810
 811 extern long filesz, hashmask, hashbase;
 812 extern FILE *hashfile;
 813 extern unsigned int starttime;
 814
 815 /* eval.c */
 816 typedef small_short Mpiece_array[2][NO_SQUARES];
 817 extern Mpiece_array *Mpiece[NO_PIECES];
 818 extern short ADVNCM[NO_PIECES];
 819
 820 #define computed_distance(a, b) \
 821     ((abs(column(a) - column(b)) > abs(row(a) - row(b))) \
 822     ? abs(column(a) - column(b)) : abs(row(a) - row(b)))
 823
 824 extern short distance(short a, short b);
 825 extern short ptype_distance(short ptyp, short f, short t);
 826 extern short piece_distance(short side, short piece, short f, short t);
 827
 828 #if defined UNKNOWN
 829 #  undef UNKNOWN
 830 #endif
 831
 832 #define UNKNOWN      'U'
 833 #define STATIC_ROOK  'S'
 834 #define RANGING_ROOK 'R'
 835
 836 extern char GameType[2];
 837 void ShowGameType(void);
 838
 839 extern unsigned short bookmaxply;
 840 extern unsigned int bookcount;
 841 extern unsigned int booksize;
 842 extern unsigned long hashkey, hashbd;
 843
 844 typedef struct hashval hashcode_array[2][NO_PIECES][NO_SQUARES];
 845 typedef struct hashval drop_hashcode_array[2][NO_PIECES][NO_SQUARES];
 846
 847 extern hashcode_array  *hashcode;
 848 extern drop_hashcode_array  *drop_hashcode;
 849
 850 #ifdef QUIETBACKGROUND
 851 extern short background;
 852 #endif /* QUIETBACKGROUND */
 853
 854 #if ttblsz
 855 extern short use_ttable;
 856 extern struct hashentry  *ttable[2];
 857 #endif
 858
 859 /*
 860  * hashbd contains a 32 bit "signature" of the board position. hashkey
 861  * contains a 16 bit code used to address the hash table. When a move is
 862  * made, XOR'ing the hashcode of moved piece on the from and to squares with
 863  * the hashbd and hashkey values keeps things current.
 864  */
 865
 866 #define UpdateHashbd(side, piece, f, t) \
 867 { \
 868   if ((f) >= 0) \
 869     { \
 870       hashbd  ^= (*hashcode)[side][piece][f].bd;  \
 871       hashkey ^= (*hashcode)[side][piece][f].key; \
 872     } \
 873  \
 874   if ((t) >= 0) \
 875     { \
 876       hashbd  ^= (*hashcode)[side][piece][t].bd;  \
 877       hashkey ^= (*hashcode)[side][piece][t].key; \
 878     } \
 879 }
 880
 881 #define UpdateDropHashbd(side, piece, count) \
 882 { \
 883   hashbd  ^= (*drop_hashcode)[side][piece][count].bd;  \
 884   hashkey ^= (*drop_hashcode)[side][piece][count].key; \
 885 }
 886
 887
 888 extern short rpthash[2][256];
 889 extern char *DRAW;
 890
 891 extern char* DRAW_REPETITION;
 892 extern char *DRAW_MAXMOVES;
 893 extern char *DRAW_JUSTDRAW;
 894
 895 #define row(a)     ((a) / NO_COLS)
 896 #define column(a)  ((a) % NO_COLS)
 897 #define locn(a, b) (((a) * NO_COLS) + b)
 898
 899 /* init external functions */
 900 extern void InitConst(char *lang); /* init.c */
 901 extern int  Initialize_data(void); /* init.c */
 902 extern void Free_data(void);       /* init.c */
 903 extern int  Lock_data(void);       /* init.c */
 904 extern void Unlock_data(void);     /* init.c */
 905 extern void Initialize_dist(void); /* init.c */
 906 extern void Initialize_eval(void); /* eval.c */
 907 extern void NewGame(void);
 908 extern void GetOpenings(void);
 909 extern int  OpeningBook(unsigned short *hint);
 910
 911 typedef enum
 912 {
 913     REMOVE_PIECE = 1, ADD_PIECE
 914 } UpdatePieceList_mode;
 915
 916 extern void
 917 UpdatePieceList(short side, short sq, UpdatePieceList_mode iop);
 918
 919 typedef enum
 920 {
 921     FOREGROUND_MODE = 1, BACKGROUND_MODE
 922 } SelectMove_mode;
 923
 924 extern void
 925 SelectMove(short side, SelectMove_mode iop);
 926
 927 extern int
 928 search(short side,
 929        short ply,
 930        short depth,
 931        short alpha,
 932        short beta,
 933        unsigned short *bstline,
 934        short *rpt);
 935
 936 #ifdef CACHE
 937 void PutInEETable(short side, int score);
 938 int  CheckEETable(short side);
 939 int  ProbeEETable(short side, short *score);
 940 #endif
 941
 942 #if ttblsz
 943 extern int
 944 ProbeTTable(short side,
 945             short depth,
 946             short ply,
 947             short *alpha,
 948             short *beta,
 949             short *score);
 950
 951 extern int
 952 PutInTTable(short side,
 953             short score,
 954             short depth,
 955             short ply,
 956             short beta,
 957             unsigned short mv);
 958
 959 extern void ZeroTTable(void);
 960 extern void ZeroRPT(void);
 961 extern void Initialize_ttable(void);
 962 extern unsigned int urand(void);
 963
 964 #  ifdef HASHFILE
 965 extern void gsrand(unsigned int);
 966
 967 extern int
 968 ProbeFTable(short side,
 969             short depth,
 970             short ply,
 971             short *alpha,
 972             short *beta,
 973             short *score);
 974
 975 extern void
 976 PutInFTable(short side,
 977             short score,
 978             short depth,
 979             short ply,
 980             short alpha,
 981             short beta,
 982             unsigned short f,
 983             unsigned short t);
 984
 985 #  endif /* HASHFILE */
 986 #endif /* ttblsz */
 987
 988 #if !defined SAVE_NEXTPOS
 989 extern void Initialize_moves(void);
 990 #endif
 991
 992 extern short generate_move_flags;
 993
 994 extern void MoveList(short side, short ply,
 995                      short in_check, short blockable);
 996 extern void CaptureList(short side, short ply,
 997                         short in_check, short blockable);
 998
 999 /* from attacks.c */
1000 extern int
1001 SqAttacked(short square, short side, short *blockable);
1002
1003 extern void
1004 MakeMove(short side,
1005          struct leaf  *node,
1006          short *tempb,
1007          short *tempc,
1008          short *tempsf,
1009          short *tempst,
1010          short *INCscore);
1011
1012 extern void
1013 UnmakeMove(short side,
1014            struct leaf  *node,
1015            short *tempb,
1016            short *tempc,
1017            short *tempsf,
1018            short *tempst);
1019
1020 extern void
1021 InitializeStats(void);
1022
1023 extern int
1024 evaluate(short side,
1025          short ply,
1026          short alpha,
1027          short beta,
1028          short INCscore,
1029          short *InChk,
1030          short *blockable);
1031
1032 extern short ScorePosition(short side);
1033 extern void  ExaminePosition(short side);
1034 extern short ScorePatternDistance(short side);
1035 extern void  DetermineStage(short side);
1036 extern void  UpdateWeights(short side);
1037 extern int   InitMain(void);
1038 extern void  ExitMain(void);
1039 extern void  Initialize(void);
1040 extern void  InputCommand(char *command);
1041 extern void  ExitShogi(void);
1042 extern void  ClearScreen(void);
1043 extern void  SetTimeControl(void);
1044 extern void  SelectLevel(char *sx);
1045
1046 extern void
1047 UpdateDisplay(short f,
1048               short t,
1049               short flag,
1050               short iscastle);
1051
1052 typedef enum
1053 {
1054     COMPUTE_AND_INIT_MODE = 1, COMPUTE_MODE
1055 #ifdef INTERRUPT_TEST
1056     , INIT_INTERRUPT_MODE, COMPUTE_INTERRUPT_MODE
1057 #endif
1058 } ElapsedTime_mode;
1059
1060 extern void  SetResponseTime(short side);
1061 extern void  CheckForTimeout(int score, int globalscore,
1062                              int Jscore, int zwndw);
1063 extern void  ShowSidetoMove(void);
1064 extern void  ShowResponseTime(void);
1065 extern void  ShowPatternCount(short side, short n);
1066 extern void  SearchStartStuff(short side);
1067 extern void  ShowDepth(char ch);
1068 extern void  TerminateSearch(int);
1069 extern void  ShowResults(short score, unsigned short *bstline, char ch);
1070 extern void  SetupBoard(void);
1071 extern void  algbr(short f, short t, short flag);
1072 extern void  OutputMove(void);
1073 extern void  ShowCurrentMove(short pnt, short f, short t);
1074 extern void  ListGame(void);
1075 extern void  ShowMessage(char *s);
1076 extern void  ClearScreen(void);
1077 extern void  DoDebug(void);
1078 extern void  DoTable(short table[NO_SQUARES]);
1079 extern void  ShowPostnValues(void);
1080 extern void  ChangeXwindow(void);
1081 extern void  SetContempt(void);
1082 extern void  ChangeHashDepth(void);
1083 extern void  ChangeBetaWindow(void);
1084 extern void  GiveHint(void);
1085 extern void  ShowPrompt(void);
1086 extern void  EditBoard(void);
1087 extern void  help(void);
1088 extern void  ChangeSearchDepth(void);
1089 extern void  skip(void);
1090 extern void  skipb(void);
1091 extern void  EnPassant(short xside, short f, short t, short iop);
1092 extern void  ShowNodeCnt(long NodeCnt);
1093 extern void  ShowLine(unsigned short *bstline);
1094 extern int   pick(short p1, short p2);
1095 extern short repetition(void);
1096 extern void  TimeCalc(void);
1097 extern void  ElapsedTime(ElapsedTime_mode iop);
1098
1099 extern short
1100 DropPossible(short piece, short side, short sq); /* genmoves.c */
1101
1102 extern short
1103 IsCheckmate(short side, short in_check,
1104             short blockable); /* genmoves.c */
1105
1106
1107 typedef enum
1108 {
1109     VERIFY_AND_MAKE_MODE, VERIFY_AND_TRY_MODE, UNMAKE_MODE
1110 } VerifyMove_mode;
1111
1112 extern int VerifyMove(char *s, VerifyMove_mode iop, unsigned short *mv);
1113 extern unsigned short TTage;
1114
1115 /* display driver framework */
1116
1117 struct display
1118 {
1119     void (*ChangeAlphaWindow)(void);
1120     void (*ChangeBetaWindow)(void);
1121     void (*ChangeHashDepth)(void);
1122     void (*ChangeSearchDepth)(char *sx);
1123     void (*ChangeXwindow)(void);
1124     void (*ClearScreen)(void);
1125     void (*DoDebug)(void);
1126     void (*DoTable)(short table[NO_SQUARES]);
1127     void (*EditBoard)(void);
1128     void (*ExitShogi)(void);
1129     void (*GiveHint)(void);
1130     void (*Initialize)(void);
1131     void (*ShowNodeCnt)(long NodeCnt);
1132     void (*OutputMove)(void);
1133     void (*PollForInput)(void);
1134     void (*SetContempt)(void);
1135     void (*SearchStartStuff)(short side);
1136     void (*SelectLevel)(char *sx);
1137     void (*ShowCurrentMove)(short pnt, short f, short t);
1138     void (*ShowDepth)(char ch);
1139     void (*ShowGameType)(void);
1140     void (*ShowLine)(unsigned short *bstline);
1141     void (*ShowMessage)(char *s);
1142     void (*AlwaysShowMessage)(const char *format, ...);
1143     void (*Printf)(const char *format, ...);
1144     void (*doRequestInputString)(const char* fmt, char* buffer);
1145     int  (*GetString)(char* sx);
1146     void (*SetupBoard)(void);
1147     void (*ShowPatternCount)(short side, short n);
1148     void (*ShowPostnValue)(short sq);
1149     void (*ShowPostnValues)(void);
1150     void (*ShowPrompt)(void);
1151     void (*ShowResponseTime)(void);
1152     void (*ShowResults)(short score, unsigned short *bstline, char ch);
1153     void (*ShowSidetoMove)(void);
1154     void (*ShowStage)(void);
1155     void (*TerminateSearch)(int sig);
1156     void (*UpdateClocks)(void);
1157     void (*UpdateDisplay)(short f, short t, short redraw, short isspec);
1158     void (*help)(void);
1159 };
1160
1161 extern struct display *dsp;
1162
1163 extern struct display raw_display;
1164 extern struct display curses_display;
1165
1166 #endif /* _GNUSHOGI_H_ */