gnushogi/gnushogi.h

   1 /*
   2  * FILE: gnushogi.h
   3  *
   4  *     Main header file for GNU Shogi.
   5  *
   6  * ----------------------------------------------------------------------
   7  *
   8  * Copyright (c) 2012 Free Software Foundation
   9  *
  10  * GNU SHOGI is based on GNU CHESS
  11  *
  12  * This file is part of GNU SHOGI.
  13  *
  14  * GNU Shogi is free software; you can redistribute it and/or modify it
  15  * under the terms of the GNU General Public License as published by the
  16  * Free Software Foundation; either version 3 of the License,
  17  * or (at your option) any later version.
  18  *
  19  * GNU Shogi is distributed in the hope that it will be useful, but WITHOUT
  20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  22  * for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along
  25  * with GNU Shogi; see the file COPYING. If not, see
  26  * <http://www.gnu.org/licenses/>.
  27  * ----------------------------------------------------------------------
  28  *
  29  */
  30
  31 /* Hack for anal-retentive ANSI-compliance if desired: */
  32 #define inline
  33
  34 /* FIXME: this file needs to be reorganized in some rational manner. */
  35
  36 #ifndef _GNUSHOGI_H_
  37 #define _GNUSHOGI_H_
  38
  39 #include "config.h"        /* Portability #defines. */
  40 #include "debug.h"
  41 #include "opts.h"          /* Various option-setting #defines.  */
  42
  43 /*
  44  * Display options.
  45  */
  46
  47 typedef enum { DISPLAY_RAW, DISPLAY_CURSES, DISPLAY_X } display_t;
  48 extern display_t display_type;
  49
  50 #define XSHOGI     (display_type == DISPLAY_X)
  51 #define NOT_CURSES ((display_type == DISPLAY_X) \
  52   || (display_type == DISPLAY_RAW))
  53
  54
  55 /* Miscellaneous globals. */
  56
  57 extern short hard_time_limit; /* If you exceed time limit, you lose.   */
  58 extern short barebones;       /* Don't print of stats for x interface. */
  59 extern short nolist;          /* Don't list game after exit.           */
  60
  61
  62 /*
  63  * Options for various compilers/OSs.
  64  */
  65
  66 /*
  67  * type small_short must cover -128 .. 127.  In case of trouble,
  68  * try commenting out "signed".  If this doesn't help, use short.
  69  */
  70
  71 #define small_short  signed char
  72 #define small_ushort unsigned char
  73
  74
  75 typedef small_short    BYTE;
  76 typedef small_ushort   UBYTE;
  77 typedef short          SHORT;
  78 typedef unsigned short USHORT;
  79 typedef int            INT;
  80 typedef unsigned int   UINT;
  81 typedef long           LONG;
  82 typedef unsigned long  ULONG;
  83
  84
  85 #if !defined(HAVE_MEMCPY) && !defined(HAVE_BCOPY)
  86 #  define array_copy(src, dst, len) \
  87    { \
  88        long i; \
  89        char  *psrc = (char  *)src, *pdst = (char  *)dst; \
  90        for (i = len; i; pdst[--i] = psrc[i]); \
  91    }
  92 #  define array_zero(dst, len) \
  93   { \
  94       long i; \
  95       char  *pdst = (char  *)dst; \
  96       for (i = len; i; pdst[--i] = 0); \
  97   }
  98 #elif !defined(HAVE_MEMCPY)   /* BSD and derivatives */
  99 #  define array_copy(src, dst, len) bcopy(src, dst, len)
 100 #  define array_zero(dst, len)      bzero(dst, len)
 101 #else /* System V and derivatives */
 102 #  define array_copy(src, dst, len) memcpy(dst, src, len)
 103 #  define array_zero(dst, len)      memset(dst, 0, len)
 104 #endif
 105
 106
 107 #ifndef __GNUC__
 108 #  define inline
 109 #endif
 110
 111
 112 /*
 113  * Standard header files.
 114  */
 115
 116 #include <stdio.h>
 117 #include <ctype.h>
 118 #include <stdlib.h>
 119 #include <assert.h>
 120 #include <string.h>
 121
 122 #include <sys/param.h>
 123 #include <sys/types.h>
 124 #include <sys/times.h>
 125 #include <sys/ioctl.h>
 126
 127
 128 #if TIME_WITH_SYS_TIME
 129 #  include <sys/time.h>
 130 #  include <time.h>
 131 #else
 132 #  if HAVE_SYS_TIME_H
 133 #    include <sys/time.h>
 134 #  else
 135 #    include <time.h>
 136 #  endif
 137 #endif
 138
 139 #define RWA_ACC "r+"
 140 #define WA_ACC "w+"
 141 #ifdef BINBOOK
 142 extern char *binbookfile;
 143 #endif
 144
 145 extern char *bookfile;
 146 extern short ahead;
 147 extern char  *xwin;
 148 extern char  *Lang;
 149 extern void movealgbr(short m, char *s);
 150
 151
 152 #define SEEK_SET 0
 153 #define SEEK_END 2
 154
 155 #define NO_PIECES       15
 156 #define MAX_CAPTURED    19
 157 #define NO_PTYPE_PIECES 15
 158 #define NO_COLS          9
 159 #define NO_ROWS          9
 160 #define NO_SQUARES      (NO_COLS*NO_ROWS)
 161
 162 #define ROW_NAME(n) ('a' + NO_ROWS - 1 - n)
 163 #define COL_NAME(n) ('1' + NO_COLS - 1 - n)
 164
 165 #if defined HASHFILE || defined CACHE
 166 #  define PTBLBDSIZE (NO_SQUARES + NO_PIECES)
 167 #endif
 168
 169 #include "dspwrappers.h"   /* Display functions. */
 170 #include "eval.h"
 171
 172 #define SCORE_LIMIT 12000
 173
 174 /* masks into upper 16 bits of attacks array */
 175 /* observe order of relative piece values */
 176 #define CNT_MASK 0x000000FF
 177 #define ctlP  0x00200000
 178 #define ctlPp 0x00100000
 179 #define ctlL  0x00080000
 180 #define ctlN  0x00040000
 181 #define ctlLp 0x00020000
 182 #define ctlNp 0x00010000
 183 #define ctlS  0x00008000
 184 #define ctlSp 0x00004000
 185 #define ctlG  0x00002000
 186 #define ctlB  0x00001000
 187 #define ctlBp 0x00000800
 188 #define ctlR  0x00000400
 189 #define ctlRp 0x00000200
 190 #define ctlK  0x00000100
 191
 192 /* attack functions */
 193 #define Pattack(c, u)   (attack[c][u] > ctlP)
 194 #define Anyattack(c, u) (attack[c][u] != 0)
 195
 196 /* hashtable flags */
 197 #define truescore   0x0001
 198 #define lowerbound  0x0002
 199 #define upperbound  0x0004
 200 #define kingcastle  0x0008
 201 #define queencastle 0x0010
 202 #define evalflag    0x0020
 203
 204 /* King positions */
 205 #define BlackKing PieceList[black][0]
 206 #define WhiteKing PieceList[white][0]
 207 #define OwnKing   PieceList[c1][0]
 208 #define EnemyKing PieceList[c2][0]
 209
 210
 211 /* board properties */
 212 #define InBlackCamp(sq) ((sq) < 27)
 213 #define InWhiteCamp(sq) ((sq) > 53)
 214 #define InPromotionZone(side, sq) \
 215 (((side) == black) ? InWhiteCamp(sq) : InBlackCamp(sq))
 216
 217 /* constants */
 218 #define OPENING_HINT 0x141d /* P7g-7f (20->29) */
 219
 220 /* truth values */
 221 #ifndef false
 222 #define false 0
 223 #endif
 224
 225 #ifndef true
 226 #define true  1
 227 #endif
 228
 229 /* colors */
 230 #define black   0
 231 #define white   1
 232 #define neutral 2
 233
 234 /* piece code defines */
 235 enum {
 236     no_piece = 0,
 237     pawn,
 238     lance,
 239     knight,
 240     silver,
 241     gold,
 242     bishop,
 243     rook,
 244     ppawn,
 245     plance,
 246     pknight,
 247     psilver,
 248     pbishop,
 249     prook,
 250     king
 251 };
 252
 253 /* move types */
 254 enum {
 255     ptype_no_piece = 0,
 256     ptype_pawn = 0,
 257     ptype_lance,
 258     ptype_knight,
 259     ptype_silver,
 260     ptype_gold,
 261     ptype_bishop,
 262     ptype_rook,
 263     ptype_pbishop,
 264     ptype_prook,
 265     ptype_king,
 266     ptype_wpawn,
 267     ptype_wlance,
 268     ptype_wknight,
 269     ptype_wsilver,
 270     ptype_wgold
 271 };
 272
 273 /* node flags */
 274 #define pmask        0x000f /*    15 */
 275 #define promote      0x0010 /*    16 */
 276 #define dropmask     0x0020 /*    32 */
 277 #define exact        0x0040 /*    64 */
 278 #define tesuji       0x0080 /*   128 */
 279 #define check        0x0100 /*   256 */
 280 #define capture      0x0200 /*   512 */
 281 #define draw         0x0400 /*  1024 */
 282 #define stupid       0x0800 /*  2048 */
 283 #define questionable 0x1000 /*  4096 */
 284 #define kingattack   0x2000 /*  8192 */
 285 #define book         0x4000 /* 16384 */
 286
 287 /* move quality flags */
 288 #define goodmove     tesuji
 289 #define badmove      stupid
 290 #ifdef EASY_OPENINGS
 291 #define difficult    questionable
 292 #endif
 293
 294 /* move symbols */
 295 #define pxx (CP[2])
 296 #define qxx (CP[1])
 297 #define rxx (CP[4])
 298 #define cxx (CP[3])
 299
 300 /***************** Table limits ********************************************/
 301
 302 /*
 303  * ttblsz must be a power of 2. Setting ttblsz 0 removes the transposition
 304  * tables.
 305  */
 306
 307 #if defined NOTTABLE
 308 #  define vttblsz 0
 309 #elif defined SMALL_MEMORY
 310 #  if defined SAVE_SSCORE
 311 #    define vttblsz (1 << 12)
 312 #  else
 313 #    if defined EXTRA_2MB
 314 #      define vttblsz (1 << 12)
 315 #    else
 316 #      define vttblsz (1 << 10)
 317 #    endif
 318 #  endif
 319 #else
 320 #  define vttblsz (100001)
 321 #endif
 322
 323 #if defined SMALL_MEMORY
 324 #  define MINTTABLE (0)
 325 #else
 326 #  define MINTTABLE (8000)    /* min ttable size -1 */
 327 #endif
 328
 329 #define ttblsz vttblsz
 330
 331 #if defined SMALL_MEMORY
 332 #  if !defined SAVE_SSCORE
 333 #    define TREE 1500             /* max number of tree entries */
 334 #  else
 335 #    define TREE 2500             /* max number of tree entries */
 336 #  endif
 337 #else
 338 #  define TREE 4000               /* max number of tree entries */
 339 #endif
 340
 341 #define MAXDEPTH  40            /* max depth a search can be carried */
 342 #define MINDEPTH   2            /* min search depth =1 (no hint), >1 hint */
 343 #define MAXMOVES 300            /* max number of half moves in a game */
 344 #define CPSIZE   235            /* size of lang file max */
 345
 346 #if defined SMALL_MEMORY
 347 #  if defined SAVE_SSCORE
 348 #    define ETABLE (1 << 10)      /* static eval cache */
 349 #  else
 350 #    if defined EXTRA_2MB
 351 #      define ETABLE (1 << 10)    /* static eval cache */
 352 #    else
 353 #      define ETABLE (1 << 8)     /* static eval cache */
 354 #    endif
 355 #  endif
 356 #else
 357 #  define ETABLE (10001)          /* static eval cache */
 358 #endif
 359
 360 /***************** tuning paramaters *******************/
 361
 362 #if defined VERY_SLOW_CPU
 363 #  define MINRESPONSETIME 300
 364 #elif defined SLOW_CPU
 365 #  define MINRESPONSETIME 200
 366 #else
 367 #  define MINRESPONSETIME 100     /* 1 s */
 368 #endif
 369
 370 #define MINGAMEIN  4
 371 #define MINMOVES  15
 372 #define CHKDEPTH   1   /* always look forward CHKDEPTH
 373                         * half-moves if in check */
 374
 375 #if defined SLOW_CPU || defined VERY_SLOW_CPU
 376 #  define DEPTHBEYOND 7     /* Max to go beyond Sdepth */
 377 #else
 378 #  define DEPTHBEYOND 11    /* Max to go beyond Sdepth */
 379 #endif
 380
 381 #define HASHDEPTH      4  /* depth above which to use HashFile */
 382 #define HASHMOVELIMIT 40  /* Use HashFile only for this many moves */
 383 #define PTVALUE        0  /* material value below which pawn threats at
 384                            * 5 & 3 are used */
 385 #define ZDEPTH 3          /* depth beyond which to check
 386                            * ZDELTA for extra time */
 387 #define ZDELTA 10         /* score delta per ply to cause
 388                            * extra time to be given */
 389 #define BESTDELTA 90
 390
 391 /* about 1/2 second worth of nodes for your machine */
 392 #if defined VERY_SLOW_CPU
 393 /* check the time every ZNODES positions */
 394 #  define ZNODES (flag.tsume ? 20 : 50)
 395 #elif defined SLOW_CPU
 396 #  define ZNODES (flag.tsume ? 40 : 100)
 397 #else
 398 #  define ZNODES (flag.tsume ? 400 : 1000)
 399 #endif
 400
 401 #define MAXTCCOUNTX  10  /* max number of time clicks
 402                           * per search to complete ply */
 403 #define MAXTCCOUNTR   4  /* max number of time clicks
 404                           * per search extensions*/
 405 #define SCORESPLIM    8  /* Score space doesn't apply after this stage */
 406 #define SDEPTHLIM    (Sdepth + 1)
 407 #define HISTORYLIM 4096  /* Max value of history killer */
 408
 409 #ifdef EXACTHISTORY
 410 #  if defined SMALL_MEMORY
 411 #    define HISTORY_MASK 0x8000     /* mask to MSB of history index */
 412 #    define HISTORY_SIZE 0x10000    /* size of history table */
 413 #  else
 414 #    define HISTORY_MASK (1 << 15)  /* mask to MSB of history index */
 415 #    define HISTORY_SIZE (1 << 16)  /* size of history table */
 416 #  endif
 417 #else
 418 /* smaller history table, but dangerous because of collisions */
 419 #  define HISTORY_MASK 0x3fff     /* mask to significant bits
 420                                    * of history index */
 421 #  if defined SMALL_MEMORY
 422 #    define HISTORY_SIZE 0x4000 /* size of history table */
 423 #  else
 424 #    define HISTORY_SIZE (1 << 14)  /* size of history table */
 425 #  endif
 426 #endif
 427
 428 #define sizeof_history (sizeof(unsigned short) * (size_t)HISTORY_SIZE)
 429
 430 #ifdef EXACTHISTORY
 431 /* Map from.to (8bit.8bit) to from.to (0.7bit.8bit) */
 432 #  define khmove(mv) (mv & 0x7fff)
 433 #  define hmove(mv) ((mv & 0x7fff) ^ 0x5555)
 434 #else
 435 /* Map from.to (8bit.8bit) to from.to (00.7bit.7bit) */
 436 /* Swap bits of ToSquare in case of promotions, hoping that
 437    no catastrophic collision occurs. */
 438 #  define khmove(mv) (((mv & 0x7f00) >> 1) | \
 439            ((mv & 0x0080) ? ((mv & 0x007f) ^ 0x007f) : (mv & 0x007f)))
 440 #  define hmove(mv) (khmove(mv) ^ 0x2aaa)
 441 #endif
 442
 443 /* mask color to 15th bit */
 444 #ifdef EXACTHISTORY
 445 #  define hindex(c, mv) ((c ? HISTORY_MASK : 0) | hmove(mv))
 446 #else
 447 /* for white, swap bits, hoping that no catastrophic collision occurs. */
 448 #  define hindex(c, mv) (c ? ((~hmove(mv)) & HISTORY_MASK) : hmove(mv))
 449 #endif
 450
 451 #define EWNDW  10    /* Eval window to force position scoring at depth
 452                       * greater than (Sdepth + 2)        */
 453 #define WAWNDW 90    /* alpha window when computer black */
 454 #define WBWNDW 90    /* beta window when computer black  */
 455 #define BAWNDW 90    /* alpha window when computer white */
 456 #define BBWNDW 90    /* beta window when computer white  */
 457 #define BXWNDW 90    /* window to force position scoring at lower */
 458 #define WXWNDW 90    /* window to force position scoring at lower */
 459
 460 #define DITHER  5    /* max amount random can alter a pos value */
 461 #define LBONUS  1    /* points per stage value of L increases   */
 462 #define BBONUS  2    /* points per stage value of B increases   */
 463 #define RBONUS  2    /* points per stage value of R increases   */
 464
 465 #define QUESTIONABLE (valueK)   /* Penalty for questionable moves. */
 466
 467 #if defined STUPID
 468 #  undef STUPID
 469 #endif
 470
 471 #define STUPID (valueR << 1)    /* Penalty for stupid moves. */
 472
 473 #define KINGPOSLIMIT (-1)      /* King positional scoring limit */
 474 #define KINGSAFETY  32
 475 #define MAXrehash (7)
 476
 477 /******* parameters for Opening Book ****************/
 478
 479 #define BOOKSIZE   8000  /* Number of unique position/move
 480                           * combinations allowed */
 481 #define BOOKMAXPLY   40           /* Max plys to keep in book database */
 482 #define BOOKFAIL (BOOKMAXPLY / 2) /* if no book move found for BOOKFAIL
 483                                    * turns stop using book */
 484 #define BOOKPOCKET          64
 485 #define BOOKRAND          1000  /* used to select an opening move
 486                                  * from a list */
 487 #define BOOKENDPCT         950  /* 5 % chance a BOOKEND will stop the book */
 488 #define DONTUSE         -32760  /* flag move as don't use */
 489 #define ILLEGAL_TRAPPED -32761  /* flag move as illegal:
 490                                  * no move from this square */
 491 #define ILLEGAL_DOUBLED -32762  /* flag move as illegal:
 492                                  * two pawns on one column */
 493 #define ILLEGAL_MATE    -32763  /* flag move as illegal:
 494                                  * pawn drop with mate */
 495
 496 /*****************************************************/
 497
 498 struct hashval
 499 {
 500     unsigned long key, bd;
 501 };
 502
 503 struct hashentry
 504 {
 505     unsigned long hashbd;
 506     unsigned short mv;
 507     unsigned char depth; /* unsigned char saves some space */
 508     unsigned char flags;
 509 #ifdef notdef
 510     unsigned short age;
 511 #endif
 512     short score;
 513 #ifdef HASHTEST
 514     unsigned char bd[PTBLBDSIZE];
 515 #endif /* HASHTEST */
 516 };
 517
 518 #if defined HASHFILE || defined CACHE
 519 struct etable
 520 {
 521     unsigned long ehashbd;
 522     short escore[2];
 523 #if !defined SAVE_SSCORE
 524     short sscore[NO_SQUARES];
 525 #endif
 526     short score;
 527     small_short hung[2];
 528 #ifdef CACHETEST
 529     unsigned char bd[PTBLBDSIZE];
 530 #endif /* CACHETEST */
 531 };
 532
 533 #if defined CACHE
 534 extern short use_etable;
 535 typedef struct etable etable_field[ETABLE];
 536 extern etable_field  *etab[2];
 537 #endif
 538
 539 /*
 540  * CHECKME! Is this valid?
 541  *
 542  * persistent transposition table. By default, the size is (1 << vfilesz).
 543  * If you change the size, be sure to run gnushogi -c [vfilesz]
 544  * before anything else.
 545  */
 546
 547 #define frehash 6
 548
 549 #if defined SMALL_MEMORY
 550 #  define vfilesz 10
 551 #else
 552 #  define vfilesz 14
 553 #endif
 554
 555 struct fileentry
 556 {
 557     unsigned char bd[PTBLBDSIZE];
 558     unsigned char f, t, flags, depth, sh, sl;
 559 };
 560
 561 #endif /* HASHFILE */
 562
 563
 564 struct leaf
 565 {
 566     small_ushort f, t;
 567     short score, reply, width;
 568     short INCscore;
 569     unsigned short flags;
 570 };
 571
 572
 573 struct GameRec
 574 {
 575     unsigned short gmove;    /* this move */
 576     short score;             /* score after this move */
 577     short depth;             /* search depth this move */
 578     long  time;               /* search time this move */
 579     short fpiece;            /* moved or dropped piece */
 580     short piece;             /* piece captured */
 581     short color;             /* color */
 582     short flags;             /* move flags capture, promote, castle */
 583     short Game50;            /* flag for repetition */
 584     long  nodes;              /* nodes searched for this move */
 585     unsigned long hashkey, hashbd;   /* board key before this move */
 586 };
 587
 588
 589 struct TimeControlRec
 590 {
 591     short moves[2];
 592     long  clock[2];
 593 };
 594
 595
 596 struct flags
 597 {
 598     short mate;              /* the game is over */
 599     short post;              /* show principle variation */
 600     short quit;              /* quit/exit */
 601     short regularstart;      /* did the game start from standard
 602                               * initial board ? */
 603     short reverse;           /* reverse board display */
 604     short bothsides;         /* computer plays both sides */
 605     short hash;              /* enable/disable transposition table */
 606     short force;             /* enter moves */
 607     short easy;              /* disable thinking on opponents time */
 608     short beep;              /* enable/disable beep */
 609     short timeout;           /* time to make a move */
 610     short musttimeout;       /* time to make a move */
 611     short back;              /* time to make a move */
 612     short rcptr;             /* enable/disable recapture heuristics */
 613     short rv;                /* reverse video */
 614     short stars;             /* add stars to uxdsp screen */
 615     short coords;            /* add coords to visual screen */
 616     short shade;
 617     short material;          /* draw on lack of material */
 618     short illegal;           /* illegal position */
 619     short onemove;           /* timing is onemove */
 620     short gamein;            /* timing is gamein */
 621     short tsume;             /* first consider checks */
 622 };
 623
 624 extern FILE *debugfile;
 625
 626 #ifndef EVALFILE
 627 #define EVALFILE "/tmp/EVAL"
 628 #endif
 629
 630 extern FILE *debug_eval_file;
 631 extern short debug_moves;
 632
 633
 634 #ifdef HISTORY
 635 extern short use_history;
 636 extern unsigned short  *history;
 637 #endif
 638
 639 extern long znodes;
 640
 641 extern char ColorStr[2][10];
 642
 643 extern char mvstr[4][6];
 644 extern unsigned short MV[MAXDEPTH];
 645 extern int MSCORE;
 646 extern int mycnt1, mycnt2;
 647 extern short ahead;
 648 extern struct leaf rootnode;
 649 extern struct leaf  *Tree;
 650 extern struct leaf  *root;
 651 extern char savefile[], listfile[];
 652 extern short TrPnt[];
 653 extern small_short board[], color[];
 654 extern const small_short sweep[NO_PIECES];
 655 extern small_short PieceList[2][NO_SQUARES], PawnCnt[2][NO_COLS];
 656 extern small_short Captured[2][NO_PIECES];
 657
 658 #ifndef HAVE_MEMSET
 659 #  define ClearCaptured() \
 660   { \
 661       short piece, color; \
 662       for (color = black; color <= white; color++) \
 663           for (piece = 0; piece < NO_PIECES; piece++) \
 664               Captured[color][piece] = 0; \
 665   }
 666 #else
 667 #  define ClearCaptured() \
 668   memset((char *)Captured, 0, (unsigned long)sizeof(Captured))
 669 #endif /* HAVE_MEMSET */
 670
 671 extern small_short Mvboard[];
 672
 673 #if !defined SAVE_SVALUE
 674 extern short svalue[NO_SQUARES];
 675 #endif
 676
 677 extern short pscore[2]; /* eval.c */
 678 extern int EADD; /* eval.c */
 679 extern int EGET; /* eval.c */
 680 extern struct flags flag;
 681 extern short opponent, computer, INCscore;
 682 extern short WAwindow, BAwindow, WBwindow, BBwindow;
 683 extern short dither, player;
 684 extern short xwndw, contempt;
 685 extern long  ResponseTime, ExtraTime, TCleft,
 686     MaxResponseTime, et, et0, time0, ft;
 687 extern int   TCcount;
 688
 689 #ifdef INTERRUPT_TEST
 690 extern long itime0, it;
 691 #endif
 692
 693 extern long  reminus, replus;
 694 extern long  GenCnt, NodeCnt, ETnodes, EvalNodes, HashAdd, HashCnt,
 695     HashCol, THashCol, FHashCnt, FHashAdd;
 696 extern short HashDepth, HashMoveLimit;
 697 extern struct GameRec  *GameList;
 698 extern short GameCnt, Game50;
 699 extern short Sdepth, MaxSearchDepth;
 700 extern int   Book;
 701 extern struct TimeControlRec TimeControl;
 702 extern int   TCadd;
 703 extern short TCflag, TCmoves, TCminutes, TCseconds, OperatorTime;
 704 extern int   timecomp[MINGAMEIN], timeopp[MINGAMEIN];
 705 extern int   compptr, oppptr;
 706 extern short XCmore, XCmoves[], XCminutes[], XCseconds[], XC;
 707 extern const short otherside[];
 708 extern const small_short Stboard[];
 709 extern const small_short Stcolor[];
 710 extern unsigned short hint;
 711 extern short TOflag;
 712 extern short stage, stage2;
 713
 714 #define in_opening_stage    (!flag.tsume && (stage < 33))
 715 #define in_middlegame_stage (!flag.tsume && (stage >= 33) && (stage <= 66))
 716 #define in_endgame_stage    (flag.tsume || (stage > 66))
 717
 718 extern short ahead, hash;
 719 extern short balance[2];
 720 extern small_short ChkFlag[], CptrFlag[], TesujiFlag[];
 721 extern short Pscore[], Tscore[];
 722 extern /*unsigned*/ short rehash;  /* -1 is used as a flag --tpm */
 723 extern char version[], patchlevel[];
 724 extern unsigned int ttbllimit;
 725 extern unsigned int TTadd;
 726 extern unsigned int ttblsize;
 727 extern short mtl[], hung[];
 728 extern small_short Pindex[];
 729 extern small_short PieceCnt[];
 730 extern short FROMsquare, TOsquare;
 731 extern small_short HasPiece[2][NO_PIECES];
 732 extern const short kingP[];
 733 extern unsigned short killr0[], killr1[];
 734 extern unsigned short killr2[], killr3[];
 735 extern unsigned short PrVar[MAXDEPTH];
 736 extern unsigned short PV, SwagHt, Swag0, Swag1, Swag2, Swag3, Swag4, sidebit;
 737 extern short mtl[2], pmtl[2], hung[2];
 738 extern const small_short relative_value[];
 739 extern const long control[];
 740 extern small_short diagonal(short delta);
 741 extern const small_short promoted[NO_PIECES], unpromoted[NO_PIECES];
 742 extern const small_short is_promoted[NO_PIECES];
 743
 744 typedef unsigned char next_array[NO_SQUARES][NO_SQUARES];
 745 typedef small_short distdata_array[NO_SQUARES][NO_SQUARES];
 746
 747 extern const small_short inunmap[NO_SQUARES];
 748 extern const small_short nunmap[(NO_COLS + 2)*(NO_ROWS + 4)];
 749
 750 #if defined SAVE_NEXTPOS
 751 extern const small_short direc[NO_PTYPE_PIECES][8];
 752 extern short first_direction(short ptyp, short *d, short sq);
 753 extern short next_direction(short ptyp, short *d, short sq);
 754 extern short next_position(short ptyp, short *d, short sq, short u);
 755 #else
 756 extern short use_nextpos;
 757 extern next_array  *nextpos[NO_PTYPE_PIECES];
 758 extern next_array  *nextdir[NO_PTYPE_PIECES];
 759 #endif
 760
 761 extern value_array   *value;
 762 extern fscore_array  *fscore;
 763
 764 #ifndef SAVE_DISTDATA
 765 extern short use_distdata;
 766 extern distdata_array  *distdata;
 767 #endif
 768
 769 #ifndef SAVE_PTYPE_DISTDATA
 770 extern short use_ptype_distdata;
 771 extern distdata_array  *ptype_distdata[NO_PTYPE_PIECES];
 772 #endif
 773
 774 extern const small_short ptype[2][NO_PIECES];
 775
 776 extern long filesz, hashmask, hashbase;
 777 extern FILE *hashfile;
 778 extern unsigned int starttime;
 779
 780 /* eval.c */
 781 typedef small_short Mpiece_array[2][NO_SQUARES];
 782 extern Mpiece_array *Mpiece[NO_PIECES];
 783 extern short ADVNCM[NO_PIECES];
 784
 785 #define computed_distance(a, b) \
 786     ((abs(column(a) - column(b)) > abs(row(a) - row(b))) \
 787     ? abs(column(a) - column(b)) : abs(row(a) - row(b)))
 788
 789 extern short distance(short a, short b);
 790 extern short ptype_distance(short ptyp, short f, short t);
 791 extern short piece_distance(short side, short piece, short f, short t);
 792
 793 #if defined UNKNOWN
 794 #  undef UNKNOWN
 795 #endif
 796
 797 #define UNKNOWN      'U'
 798 #define STATIC_ROOK  'S'
 799 #define RANGING_ROOK 'R'
 800
 801 extern char GameType[2];
 802 void ShowGameType(void);
 803
 804 extern unsigned short bookmaxply;
 805 extern unsigned int bookcount;
 806 extern unsigned int booksize;
 807 extern unsigned long hashkey, hashbd;
 808
 809 typedef struct hashval hashcode_array[2][NO_PIECES][NO_SQUARES];
 810 typedef struct hashval drop_hashcode_array[2][NO_PIECES][NO_SQUARES];
 811
 812 extern hashcode_array  *hashcode;
 813 extern drop_hashcode_array  *drop_hashcode;
 814 extern char  *CP[];
 815
 816 #ifdef QUIETBACKGROUND
 817 extern short background;
 818 #endif /* QUIETBACKGROUND */
 819
 820 #if ttblsz
 821 extern short use_ttable;
 822 extern struct hashentry  *ttable[2];
 823 #endif
 824
 825 /*
 826  * hashbd contains a 32 bit "signature" of the board position. hashkey
 827  * contains a 16 bit code used to address the hash table. When a move is
 828  * made, XOR'ing the hashcode of moved piece on the from and to squares with
 829  * the hashbd and hashkey values keeps things current.
 830  */
 831
 832 #define UpdateHashbd(side, piece, f, t) \
 833 { \
 834   if ((f) >= 0) \
 835     { \
 836       hashbd  ^= (*hashcode)[side][piece][f].bd;  \
 837       hashkey ^= (*hashcode)[side][piece][f].key; \
 838     } \
 839  \
 840   if ((t) >= 0) \
 841     { \
 842       hashbd  ^= (*hashcode)[side][piece][t].bd;  \
 843       hashkey ^= (*hashcode)[side][piece][t].key; \
 844     } \
 845 }
 846
 847 #define UpdateDropHashbd(side, piece, count) \
 848 { \
 849   hashbd  ^= (*drop_hashcode)[side][piece][count].bd;  \
 850   hashkey ^= (*drop_hashcode)[side][piece][count].key; \
 851 }
 852
 853
 854 extern short rpthash[2][256];
 855 extern char *DRAW;
 856
 857 #define row(a)     ((a) / NO_COLS)
 858 #define column(a)  ((a) % NO_COLS)
 859 #define locn(a, b) (((a) * NO_COLS) + b)
 860
 861 /* init external functions */
 862 extern void InitConst(char *lang); /* init.c */
 863 extern int  Initialize_data(void); /* init.c */
 864 extern void Free_data(void);       /* init.c */
 865 extern int  Lock_data(void);       /* init.c */
 866 extern void Unlock_data(void);     /* init.c */
 867 extern void Initialize_dist(void); /* init.c */
 868 extern void Initialize_eval(void); /* eval.c */
 869 extern void NewGame(void);
 870 extern int  parse(FILE * fd, unsigned short *mv,
 871                   short side, char *opening);
 872 extern void GetOpenings(void);
 873 extern int  OpeningBook(unsigned short *hint, short side);
 874
 875 typedef enum
 876 {
 877     REMOVE_PIECE = 1, ADD_PIECE
 878 } UpdatePieceList_mode;
 879
 880 extern void
 881 UpdatePieceList(short side, short sq, UpdatePieceList_mode iop);
 882
 883 typedef enum
 884 {
 885     FOREGROUND_MODE = 1, BACKGROUND_MODE
 886 } SelectMove_mode;
 887
 888 extern void
 889 SelectMove(short side, SelectMove_mode iop);
 890
 891 extern int
 892 search(short side,
 893        short ply,
 894        short depth,
 895        short alpha,
 896        short beta,
 897        unsigned short *bstline,
 898        short *rpt);
 899
 900 #ifdef CACHE
 901 void PutInEETable(short side, int score);
 902 int  CheckEETable(short side);
 903 int  ProbeEETable(short side, short *score);
 904 #endif
 905
 906 #if ttblsz
 907 extern int
 908 ProbeTTable(short side,
 909             short depth,
 910             short ply,
 911             short *alpha,
 912             short *beta,
 913             short *score);
 914
 915 extern int
 916 PutInTTable(short side,
 917             short score,
 918             short depth,
 919             short ply,
 920             short alpha,
 921             short beta,
 922             unsigned short mv);
 923
 924 extern void ZeroTTable(void);
 925 extern void ZeroRPT(void);
 926 extern void Initialize_ttable(void);
 927 extern unsigned int urand(void);
 928
 929 #  ifdef HASHFILE
 930 extern void gsrand(unsigned int);
 931
 932 extern int
 933 ProbeFTable(short side,
 934             short depth,
 935             short ply,
 936             short *alpha,
 937             short *beta,
 938             short *score);
 939
 940 extern void
 941 PutInFTable(short side,
 942             short score,
 943             short depth,
 944             short ply,
 945             short alpha,
 946             short beta,
 947             unsigned short f,
 948             unsigned short t);
 949
 950 #  endif /* HASHFILE */
 951 #endif /* ttblsz */
 952
 953 #if !defined SAVE_NEXTPOS
 954 extern void Initialize_moves(void);
 955 #endif
 956
 957 extern short generate_move_flags;
 958
 959 extern void MoveList(short side, short ply,
 960                      short in_check, short blockable);
 961 extern void CaptureList(short side, short ply,
 962                         short in_check, short blockable);
 963
 964 /* from attacks.c */
 965 extern int
 966 SqAttacked(short square, short side, short *blockable);
 967
 968 extern void
 969 MakeMove(short side,
 970          struct leaf  *node,
 971          short *tempb,
 972          short *tempc,
 973          short *tempsf,
 974          short *tempst,
 975          short *INCscore);
 976
 977 extern void
 978 UnmakeMove(short side,
 979            struct leaf  *node,
 980            short *tempb,
 981            short *tempc,
 982            short *tempsf,
 983            short *tempst);
 984
 985 extern void
 986 InitializeStats(void);
 987
 988 extern int
 989 evaluate(short side,
 990          short ply,
 991          short alpha,
 992          short beta,
 993          short INCscore,
 994          short *InChk,
 995          short *blockable);
 996
 997 extern short ScorePosition(short side);
 998 extern void  ExaminePosition(short side);
 999 extern short ScorePatternDistance(short side);
1000 extern void  DetermineStage(short side);
1001 extern void  UpdateWeights(short side);
1002 extern int   InitMain(void);
1003 extern void  ExitMain(void);
1004 extern void  Initialize(void);
1005 extern void  InputCommand(char *command);
1006 extern void  ExitShogi(void);
1007 extern void  ClearScreen(void);
1008 extern void  SetTimeControl(void);
1009 extern void  SelectLevel(char *sx);
1010
1011 extern void
1012 UpdateDisplay(short f,
1013               short t,
1014               short flag,
1015               short iscastle);
1016
1017 typedef enum
1018 {
1019     COMPUTE_AND_INIT_MODE = 1, COMPUTE_MODE
1020 #ifdef INTERRUPT_TEST
1021     , INIT_INTERRUPT_MODE, COMPUTE_INTERRUPT_MODE
1022 #endif
1023 } ElapsedTime_mode;
1024
1025 extern void  ElapsedTime(ElapsedTime_mode iop);
1026 extern void  SetResponseTime(short side);
1027 extern void  CheckForTimeout(int score, int globalscore,
1028                              int Jscore, int zwndw);
1029 extern void  ShowSidetoMove(void);
1030 extern void  ShowResponseTime(void);
1031 extern void  ShowPatternCount(short side, short n);
1032 extern void  SearchStartStuff(short side);
1033 extern void  ShowDepth(char ch);
1034 extern void  TerminateSearch(int);
1035 extern void  ShowResults(short score, unsigned short *bstline, char ch);
1036 extern void  PromptForMove(void);
1037 extern void  SetupBoard(void);
1038 extern void  algbr(short f, short t, short flag);
1039 extern void  OutputMove(void);
1040 extern void  ShowCurrentMove(short pnt, short f, short t);
1041 extern void  ListGame(void);
1042 extern void  ShowMessage(char *s);
1043 extern void  ClearScreen(void);
1044 extern void  gotoXY(short x, short y);
1045 extern void  ClearEoln(void);
1046 extern void  DrawPiece(short sq);
1047 extern void  UpdateClocks(void);
1048 extern void  DoDebug(void);
1049 extern void  DoTable(short table[NO_SQUARES]);
1050 extern void  ShowPostnValues(void);
1051 extern void  ChangeXwindow(void);
1052 extern void  SetContempt(void);
1053 extern void  ChangeHashDepth(void);
1054 extern void  ChangeBetaWindow(void);
1055 extern void  GiveHint(void);
1056 extern void  ShowPrompt(void);
1057 extern void  EditBoard(void);
1058 extern void  help(void);
1059 extern void  ChangeSearchDepth(void);
1060 extern void  skip(void);
1061 extern void  skipb(void);
1062 extern void  EnPassant(short xside, short f, short t, short iop);
1063 extern void  ShowNodeCnt(long NodeCnt);
1064 extern void  ShowLine(unsigned short *bstline);
1065 extern int   pick(short p1, short p2);
1066 extern short repetition(void);
1067 extern void  TimeCalc(void);
1068
1069 extern short
1070 DropPossible(short piece, short side, short sq); /* genmoves.c */
1071
1072 extern short
1073 IsCheckmate(short side, short in_check,
1074             short blockable); /* genmoves.c */
1075
1076
1077 typedef enum
1078 {
1079     VERIFY_AND_MAKE_MODE, VERIFY_AND_TRY_MODE, UNMAKE_MODE
1080 } VerifyMove_mode;
1081
1082 extern int VerifyMove(char *s, VerifyMove_mode iop, unsigned short *mv);
1083 extern unsigned short TTage;
1084
1085 #endif /* _GNUSHOGI_H_ */