trans.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
  17 enum HASHTABLE_FLAGS { INVALID, EXACT, LOWER, UPPER };
  18
  19 struct main_hash_entry_t {
  20         uint64_t key;
  21         int32_t score;
  22         int32_t move;
  23         uint8_t depth;
  24         uint8_t flag;
  25 };
  26
  27 struct pawn_hash_entry_t {
  28         uint64_t key;
  29         uint64_t passers;
  30         int32_t score_op;
  31         int32_t score_eg;
  32 };
  33
  34 extern uint64_t pawn_hash_mask;
  35 extern uint64_t main_hash_mask;
  36
  37 extern struct pawn_hash_entry_t *pawn_hash[2];
  38 extern struct main_hash_entry_t *main_hash[2];
  39
  40 int initialize_main_hashtable(void);
  41 int initialize_pawn_hashtable(void);
  42
  43 int hashtable_get(int side, int depth, int ply, int *move, int *score);
  44 void hashtable_put(int side, int depth, int ply, int flag, int move, \
  45                 int score);
  46
  47 void clear_main_hashtable(void);
  48 void clear_pawn_hashtable(void);
  49 void free_main_hashtable(void);
  50 void free_pawn_hashtable(void);