CPW-Engine board(0x88)

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 * 1) include "stdafx.h"
 * 2) include "0x88_math.h"
 * 3) include "transposition.h"

sboard b;

void clearBoard { //reset b struct

for (int i=0;i<128;i++) { b.pieces[i] = PIECE_EMPTY; b.color[i] = COLOR_EMPTY; }   b.castle = 0; b.ep    = -1; b.ply   = 0; b.hash  = 0; b.phash = 0; b.stm   = 0; b.rep_index=0;

// reset perceived values

b.PieceMaterial[WHITE] = 0; b.PieceMaterial[BLACK] = 0; b.PawnMaterial[WHITE] = 0; b.PawnMaterial[BLACK] = 0; b.PcsqMg[WHITE] = 0; b.PcsqMg[BLACK] = 0; b.PcsqEg[WHITE] = 0; b.PcsqEg[BLACK] = 0;

// reset counters for (int i=0;i<6;i++) { b.PieceCount[ WHITE ] [ i ] = 0; b.PieceCount[ BLACK ] [ i ] = 0; } } /********************************************************************
 * fillSq and clearSq, beside placing a piece on a given square *
 * or erasing it, must take care for all the incrementally updated  *
 * stuff: hash keys, piece counters, material and pcsq values, king *
 * location.                                                        *

void fillSq(U8 color, U8 piece, S8 sq) {

// place a piece on the board b.pieces[sq] = piece; b.color[sq] = color; // update king location if (piece == KING) b.KingLoc[color] = sq;

if ( piece == PAWN ) { // update pawn material b.PawnMaterial[color] += e.PIECE_VALUE[piece];

// update pawn hashkey - please note conversion to a 32-bit integer b.phash ^= zobrist.piecesquare[piece][color][sq]; }	else { // update piece material b.PieceMaterial[color] += e.PIECE_VALUE[piece]; }

// update piece counter b.PieceCount[color][piece]++;

// update piece-square value b.PcsqMg[color] += e.mgPst[piece][color][sq]; b.PcsqEg[color] += e.egPst[piece][color][sq];

// update hash key b.hash ^= zobrist.piecesquare[piece][color][sq]; }

void clearSq(S8 sq) { // set intermediate variables, then do the same // as in fillSq, only backwards

U8 color = b.color[sq]; U8 piece = b.pieces[sq]; b.hash ^= zobrist.piecesquare[piece][color][sq];

if ( piece == PAWN ) { b.PawnMaterial[color] -= e.PIECE_VALUE[piece]; b.phash ^= zobrist.piecesquare[piece][color][sq]; }	else b.PieceMaterial[color] -= e.PIECE_VALUE[piece];

b.PcsqMg[color] -= e.mgPst[piece][color][sq]; b.PcsqEg[color] -= e.egPst[piece][color][sq];

b.PieceCount[color][piece]--;

b.pieces[sq] = PIECE_EMPTY; b.color[sq] = COLOR_EMPTY; }

int board_loadFromFen(char * fen) { clearBoard; clearHistoryTable; char * f = fen; char col = 0; char row = 7; do { switch( f[0] ) { case 'K': fillSq(WHITE, KING, SET_SQ(row, col));  col++; break; case 'Q': fillSq(WHITE, QUEEN, SET_SQ(row, col)); col++; break; case 'R': fillSq(WHITE, ROOK, SET_SQ(row, col));  col++; break; case 'B': fillSq(WHITE, BISHOP, SET_SQ(row, col)); col++; break; case 'N': fillSq(WHITE, KNIGHT, SET_SQ(row, col)); col++; break; case 'P': fillSq(WHITE, PAWN, SET_SQ(row, col));  col++; break; case 'k': fillSq(BLACK, KING, SET_SQ(row, col));  col++; break; case 'q': fillSq(BLACK, QUEEN, SET_SQ(row, col)); col++; break; case 'r': fillSq(BLACK, ROOK, SET_SQ(row, col));  col++; break; case 'b': fillSq(BLACK, BISHOP, SET_SQ(row, col)); col++; break; case 'n': fillSq(BLACK, KNIGHT, SET_SQ(row, col)); col++; break; case 'p': fillSq(BLACK, PAWN, SET_SQ(row, col));  col++; break; case '/': row--; col=0; break; case '1': col+=1; break; case '2': col+=2; break; case '3': col+=3; break; case '4': col+=4; break; case '5': col+=5; break; case '6': col+=6; break; case '7': col+=7; break; case '8': col+=8; break; };       f++; } while ( f[0] != ' ' ); f++; if (f[0]=='w') { b.stm = WHITE; } else { b.stm = BLACK; b.hash ^= zobrist.color; }   f+=2; do { switch( f[0] ) { case 'K': b.castle |= CASTLE_WK; break; case 'Q': b.castle |= CASTLE_WQ; break; case 'k': b.castle |= CASTLE_BK; break; case 'q': b.castle |= CASTLE_BQ; break; }       f++; } while (f[0] != ' ' ); b.hash ^= zobrist.castling[b.castle];

f++; if (f[0] != '-') { b.ep = convert_a_0x88(f); b.hash ^= zobrist.ep[b.ep]; }   do { f++; } while (f[0] != ' ' ); f++; sscanf(f, "%d", &b.ply);

b.rep_index = 0; b.rep_stack[b.rep_index] = b.hash; return 0; }

void board_display {

S8 sq; char parray[3][7] = { {'K','Q','R','B','N','P'}, {'k','q','r','b','n','p'}, { 0, 0 , 0 , 0 , 0, 0, '.'}	                    };    printf("   a b c d e f g h\n\n"); for (S8 row=7; row>=0; row--) { printf("%d ", row+1); for (S8 col=0; col<8; col++) { sq = SET_SQ(row, col); printf(" %c",parray[b.color[sq]][b.pieces[sq]] ); }

printf(" %d\n", row+1);

}   printf("\n   a b c d e f g h\n\n"); } Up one Level