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Move SquareDistance[] to bitboard.cpp

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No functional change.
This commit is contained in:
Marco Costalba
2013-06-23 13:08:10 +02:00
parent 908d98820b
commit 8cff4862a6
2 changed files with 14 additions and 16 deletions
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17
src/bitboard.h
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@@ -80,6 +80,8 @@ extern Bitboard PassedPawnMask[COLOR_NB][SQUARE_NB];
extern Bitboard PawnAttackSpan[COLOR_NB][SQUARE_NB];
extern Bitboard PseudoAttacks[PIECE_TYPE_NB][SQUARE_NB];
extern int SquareDistance[SQUARE_NB][SQUARE_NB];
const Bitboard BlackSquares = 0xAA55AA55AA55AA55ULL;
/// Overloads of bitwise operators between a Bitboard and a Square for testing
@@ -105,13 +107,22 @@ inline Bitboard operator^(Bitboard b, Square s) {
return b ^ SquareBB[s];
}
/// more_than_one() returns true if in 'b' there is more than one bit set
inline bool more_than_one(Bitboard b) {
return b & (b - 1);
}
inline int square_distance(Square s1, Square s2) {
return SquareDistance[s1][s2];
}
inline int file_distance(Square s1, Square s2) {
return abs(file_of(s1) - file_of(s2));
}
inline int rank_distance(Square s1, Square s2) {
return abs(rank_of(s1) - rank_of(s2));
}
/// shift_bb() moves bitboard one step along direction Delta. Mainly for pawns.