board.cpp

   1 /***************************************************************************
   2                           chess.cpp  -  description
   3                              -------------------
   4     begin                : Fri Jan 11 2002
   5     copyright            : (C) 2002-2005 by Maurizio Monge
   6     email                : monge@linuz.sns.it
   7  ***************************************************************************/
   8
   9 /***************************************************************************
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 #include "engine.h"
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 Board::Board()
  23 {
  24     init_knight_moves();
  25     set_as_default();
  26 }
  27
  28 //-------------------------------------------------------------------------------------
  29 //-------------------------------------------------------------------------------------
  30
  31 void Board::set_as_default()
  32 {
  33     memcpy(&data[0],b_start,128);
  34     memcpy(&castle_adj[0],b_castle_adj,128);
  35
  36     num_moves=0;
  37
  38     castle_passing_mask = 0xfc;
  39     fifty         = 0;
  40     color_to_move = WHITE;
  41     other_color = BLACK;
  42     under_check = 0xff;
  43     king_pos[1] = E1;
  44     king_pos[0] = E8;
  45     first_rank[1] = 0x00;
  46     first_rank[0] = 0x70;
  47     second_rank[1] = 0x10;
  48     second_rank[0] = 0x60;
  49     passant_rank[1] = 0x40;
  50     passant_rank[0] = 0x30;
  51     seventh_rank[1] = 0x60;
  52     seventh_rank[0] = 0x10;
  53     //cicci = 0;
  54
  55     recalc_line_pawns();
  56     recalc_mat_tracking();
  57     recalc_hash();
  58 #if TRACK_ATTACKS
  59     recalc_attacks();
  60 #endif
  61 }
  62
  63 #if 0
  64 void Board::set_as_default()
  65 {
  66     static uint8_t b_start55[] =
  67     {
  68         SENDL,SENDL,
  69         SENDL,SENDL,
  70         SENDL,SENDL,
  71         WR,WN,WB,WQ,WK,STONE,STONE,STONE,SENDL,
  72         WP,WP,WP,WP,WP,STONE,STONE,STONE,SENDL,
  73         __,__,__,__,__,STONE,STONE,STONE,SENDL,
  74         BP,BP,BP,BP,BP,STONE,STONE,STONE,SENDL,
  75         BR,BN,BB,BQ,BK,STONE,STONE,STONE,SENDL
  76     };
  77     static uint8_t b_castle_adj55[] =
  78     {
  79         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
  80         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
  81         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
  82         0xd0,0xf0,0xf0,0xf0,0xc0,0xf0,0xf0,0xf0,ENDL,
  83         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
  84         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
  85         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
  86         0x70,0xf0,0xf0,0xf0,0x30,0xf0,0xf0,0xf0,ENDL
  87     };
  88
  89     memcpy(data,b_start55,128);
  90     memset(data+128, 0xff, 128);
  91     memcpy(castle_adj,b_castle_adj55,128);
  92
  93     num_moves=0;
  94
  95     flags_stack_ptr = 0;
  96     num_old_hashes = 0;
  97
  98     castle_passing_mask = 0xfc;
  99     fifty         = 0;
 100     color_to_move = WHITE;
 101     other_color = BLACK;
 102     under_check = 0xff;
 103     king_pos[1] = E3;
 104     king_pos[0] = E8;
 105     first_rank[1] = 0x30;
 106     first_rank[0] = 0x70;
 107     second_rank[1] = 0x40;
 108     second_rank[0] = 0x60;
 109     passant_rank[1] = 0x40;
 110     passant_rank[0] = 0x60;
 111     seventh_rank[1] = 0x60;
 112     seventh_rank[0] = 0x40;
 113
 114     recalc_line_pawns();
 115     recalc_mat_tracking();
 116     recalc_hash();
 117     recalc_attacks();
 118 }
 119
 120 void Board::set_as_default()
 121 {
 122     static uint8_t b_start68[] =
 123     {
 124         SENDL,SENDL,
 125         WR,WN,WB,WQ,WK,WB,WN,WR,SENDL,
 126         WP,WP,WP,WP,WP,WP,WP,WP,SENDL,
 127         __,__,__,__,__,__,__,__,SENDL,
 128         __,__,__,__,__,__,__,__,SENDL,
 129         BP,BP,BP,BP,BP,BP,BP,BP,SENDL,
 130         BR,BN,BB,BQ,BK,BB,BN,BR,SENDL,
 131         SENDL,SENDL
 132     };
 133     static uint8_t b_castle_adj68[] =
 134     {
 135         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
 136         0xd0,0xf0,0xf0,0xf0,0xc0,0xf0,0xf0,0xe0,ENDL,
 137         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
 138         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
 139         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
 140         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL,
 141         0x70,0xf0,0xf0,0xf0,0x30,0xf0,0xf0,0xb0,ENDL,
 142         0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,0xf0,ENDL
 143     };
 144
 145     memcpy(data,b_start68,128);
 146     memset(data+128, 0xff, 128);
 147     memcpy(castle_adj,b_castle_adj68,128);
 148
 149     num_moves=0;
 150
 151     flags_stack_ptr = 0;
 152     num_old_hashes = 0;
 153
 154     castle_passing_mask = 0xfc;
 155     fifty         = 0;
 156     color_to_move = WHITE;
 157     other_color = BLACK;
 158     under_check = 0xff;
 159     king_pos[1] = E2;
 160     king_pos[0] = E7;
 161     first_rank[1] = 0x10;
 162     first_rank[0] = 0x60;
 163     second_rank[1] = 0x20;
 164     second_rank[0] = 0x50;
 165     passant_rank[1] = 0x30;
 166     passant_rank[0] = 0x40;
 167     seventh_rank[1] = 0x50;
 168     seventh_rank[0] = 0x20;
 169
 170     recalc_line_pawns();
 171     recalc_mat_tracking();
 172     recalc_hash();
 173     recalc_attacks();
 174 }
 175 #endif
 176
 177
 178
 179 /*******************************************************************************
 180     initialize a table with all possible horse moves
 181 *******************************************************************************/
 182
 183 void Board::init_knight_moves()
 184 {
 185     char poss_hmoves[8][2] = {{1,2},{-1,2},{1,-2},{-1,-2},
 186                               {2,1},{-2,1},{2,-1},{-2,-1}};
 187     if(knightmoves)
 188         return;
 189
 190     knightmoves = new KnightMove[128];
 191
 192     // For every square just check all moves;
 193     for(int x=0;x<8;x++)
 194     for(int y=0;y<8;y++)
 195     {
 196         KnightMove* current = &knightmoves [ POS_XY(x,y) ];
 197         unsigned char c = 0;
 198
 199         for(int i=0;i<8;i++)
 200         {
 201             int a = x + poss_hmoves[i][0];
 202             int b = y + poss_hmoves[i][1];
 203
 204             if( (a >= 0) && (a < 8) && (b >= 0) && (b < 8) )
 205                 current->jump[c++] = POS_XY(a,b);
 206         }
 207         for(int i=c;i<8;i++)
 208             current->jump[i] = 0xff;
 209         current->numm = c-1;
 210     }
 211 }
 212
 213 //-------------------------------------------------------------------------------------
 214
 215
 216 /* create the hashkeys.cpp file from a raw file with random data (ie /dev/urandom) */
 217 void Board::init_hash_keys(const char* file)
 218 {
 219     HashKey *hash_keys = new HashKey[14*128];
 220     FILE *f = fopen(file, "r");
 221     if(!f)
 222     {
 223         printf("Error, could not read hash keys file!\n");
 224         return;
 225     }
 226
 227     //printf("loaded \"hashkeys.dat\"\n");
 228     if(fread(hash_keys, sizeof(HashKey), 14*128, f) != 14*128)
 229         printf("Error, could not read hash keys file!\n");
 230     fclose(f);
 231
 232     FILE *s = fopen("hashkeys.cpp", "w");
 233
 234     fprintf(s, "/* Automatically generated, do not edit */\n");
 235     fprintf(s, "#include \"board.h\"\n");
 236     fprintf(s, "HashKey Board::hash_keys[14*128] = {\n");
 237
 238     for(int i=0;i<14*128;i++)
 239     {
 240         fprintf(s, " HashKey( 0x%016llxULL, 0x%08x )",
 241             (unsigned long long)hash_keys[i].check, hash_keys[i].index);
 242         if(i!=14*128-1)
 243             fprintf(s, ",");
 244         if((i+1)%2==0)
 245             fprintf(s, "\n");
 246     }
 247     fprintf(s, "};\n");
 248     fclose(s);
 249
 250     printf("hashkeys.cpp generated!\n");
 251 }