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Another (final?) attempt at squares_delta()

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This time I have removed the function alltogether !

Sorry to work above a patch of UncombedCoconut (Justin Blanchard)
but I couldn't resist ;-)

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2011-01-02 11:45:03 +01:00
parent 0693ff178e
commit deee18c758
1 changed files with 10 additions and 15 deletions
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25
src/bitboard.cpp
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@ -248,7 +248,6 @@ namespace {
void init_attacks();
void init_between_bitboards();
void init_pseudo_attacks();
SquareDelta ray_direction(Square orig, Square dest);
Bitboard index_to_bitboard(int index, Bitboard mask);
Bitboard sliding_attacks(int sq, Bitboard block, int dirs, int deltas[][2],
int fmin, int fmax, int rmin, int rmax);
@ -288,10 +287,10 @@ void init_bitboards() {
init_masks();
init_attacks();
init_between_bitboards();
init_sliding_attacks(RAttacks, RAttackIndex, RMask, RShift, RMult, rookDeltas);
init_sliding_attacks(BAttacks, BAttackIndex, BMask, BShift, BMult, bishopDeltas);
init_pseudo_attacks();
init_between_bitboards();
}
@ -454,33 +453,29 @@ namespace {
return result;
}
SquareDelta ray_direction(Square orig, Square dest) {
int df = file_distance(orig, dest);
int dr = rank_distance(orig, dest);
if (orig != dest && (!df || !dr || df == dr))
return SquareDelta(dest - orig) / Max(df, dr);
return DELTA_NONE;
}
void init_between_bitboards() {
Square s1, s2, s3;
SquareDelta d;
int f, r;
for (s1 = SQ_A1; s1 <= SQ_H8; s1++)
for (s2 = SQ_A1; s2 <= SQ_H8; s2++)
{
BetweenBB[s1][s2] = EmptyBoardBB;
d = ray_direction(s1, s2);
if (d != DELTA_NONE)
if (bit_is_set(QueenPseudoAttacks[s1], s2))
{
f = file_distance(s1, s2);
r = rank_distance(s1, s2);
d = SquareDelta(s2 - s1) / Max(f, r);
for (s3 = s1 + d; s3 != s2; s3 += d)
set_bit(&(BetweenBB[s1][s2]), s3);
}
}
}
Bitboard index_to_bitboard(int index, Bitboard mask) {