common.h

   1 /*
   2  *      This program is free software; you can redistribute it and/or modify
   3  *      it under the terms of the GNU General Public License as published by
   4  *      the Free Software Foundation; either version 2 of the License, or
   5  *      (at your option) any later version.
   6  *
   7  *      This program is distributed in the hope that it will be useful,
   8  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *      GNU General Public License for more details.
  11  *
  12  *      You should have received a copy of the GNU General Public License
  13  *      along with this program; if not, write to the Free Software
  14  *      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  15  */
  16 #include <assert.h>
  17 #include <errno.h>
  18 #include <inttypes.h>
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <sys/time.h>
  24 #include <unistd.h>
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 enum COLOR {NOBODY = -1, WHITE = 0, BLACK = 1};
  31 enum PIECES {NONE, PAWN, KNIGHT, BISHOP, ROOK, QUEEN, KING};
  32 enum SQUARES64 {
  33         A1, B1, C1, D1, E1, F1, G1, H1,
  34         A2, B2, C2, D2, E2, F2, G2, H2,
  35         A3, B3, C3, D3, E3, F3, G3, H3,
  36         A4, B4, C4, D4, E4, F4, G4, H4,
  37         A5, B5, C5, D5, E5, F5, G5, H5,
  38         A6, B6, C6, D6, E6, F6, G6, H6,
  39         A7, B7, C7, D7, E7, F7, G7, H7,
  40         A8, B8, C8, D8, E8, F8, G8, H8 };
  41
  42 #define TRUE 1
  43 #define FALSE 0
  44
  45 #define MAX_STRING 2048
  46
  47 #define MAX_PLY 64
  48
  49 #define OPENING 0
  50 #define ENDGAME 1
  51
  52 #define MAX(a, b)                  ((a) > (b) ? (a) : (b))
  53 #define MIN(a, b)                  ((a) < (b) ? (a) : (b))
  54
  55 #define _FILE(x)                        ((x) & 7)
  56 #define _RANK(x)                        ((x) >> 3)
  57
  58 #define ZERO_MEM(x)                     (memset (&(x), 0, sizeof (x)))
  59
  60 #define MATE_VALUE 30000
  61 #define SCORE_IS_MATE(x)        ((x) > MATE_VALUE - 512 || (x) < -MATE_VALUE + 512)
  62
  63 /* simple bit operations */
  64 #define BIT(x)                     (1ULL << (x))
  65 #define SET(bb, i)                 ((bb) |= BIT(i))
  66 #define CLEAR(bb, i)       ((bb) &= ~BIT(i))
  67
  68 #define _RANK1 0x00000000000000FFULL
  69 #define _RANK2 0x000000000000FF00ULL
  70 #define _RANK7 0x00FF000000000000ULL
  71 #define _RANK8 0xFF00000000000000ULL
  72
  73 #define WHITESQUARES  0x55AA55AA55AA55AAULL
  74 #define BLACKSQUARES  0xAA55AA55AA55AA55ULL
  75
  76 #define GAME_PHASE MAX((256 - (int)(256.0 * (wbc + wnc + wrc * 2 + wqc * 8 + \
  77         bnc + bbc + brc * 2 + bqc * 8) / 32.0)), 0)
  78
  79 /* global data */
  80 extern char program_name[MAX_STRING];
  81
  82 /* zobrist hash */
  83 extern uint64_t hash_wck;
  84 extern uint64_t hash_wcq;
  85 extern uint64_t hash_bck;
  86 extern uint64_t hash_bcq;
  87 extern uint64_t hash_code[2][7][64];
  88 extern uint64_t hash_ep[8];
  89 extern uint64_t hash_side;
  90
  91 extern uint64_t *p_hash_piece;
  92 extern uint64_t *p_hash_castle;
  93 extern uint64_t *p_hash_ep;
  94 extern uint64_t *p_hash_side;
  95
  96 /* Bitwise operations */
  97 extern int bitcount[65536];
  98
  99 int bit_scan(uint64_t b);
 100 int bit_scan_clear(uint64_t *b);
 101 int bit_scan_rev(uint64_t b);
 102 static inline int popcount(uint64_t b)
 103 {
 104         return (bitcount[(b) >> 48] + bitcount[((b) >> 32) & 0xffff] + \
 105                         bitcount[((b) >> 16) & 0xffff] + bitcount[(b) & 0xffff]);
 106 }
 107