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Retire direction.cpp

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Move the code to bitboard.cpp

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-12-26 16:27:58 +01:00
parent cb7f20913e
commit 4dded4e72f
7 changed files with 55 additions and 82 deletions
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34
src/bitboard.cpp
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@@ -236,6 +236,7 @@ Bitboard RookPseudoAttacks[64];
Bitboard QueenPseudoAttacks[64];
uint8_t BitCount8Bit[256];
int8_t DirectionTable[64][64];
////
@@ -244,6 +245,8 @@ uint8_t BitCount8Bit[256];
namespace {
SquareDelta get_direction(Square orig, Square dest);
void init_direction_table();
void init_masks();
void init_attacks();
void init_between_bitboards();
@@ -285,6 +288,7 @@ void init_bitboards() {
int rookDeltas[4][2] = {{0,1},{0,-1},{1,0},{-1,0}};
int bishopDeltas[4][2] = {{1,1},{-1,1},{1,-1},{-1,-1}};
init_direction_table();
init_masks();
init_attacks();
init_between_bitboards();
@@ -380,6 +384,36 @@ namespace {
// understand, but they all seem to work correctly, and it should never
// be necessary to touch any of them.
SquareDelta get_direction(Square orig, Square dest) {
const SquareDelta directions[] = {
DELTA_E, DELTA_N, DELTA_NE, DELTA_NW, DELTA_W, DELTA_S, DELTA_SW, DELTA_SE
};
for (int idx = 0; idx < 8; idx++)
{
Square from = orig;
Square to = from + directions[idx];
while (to != dest && square_distance(to, from) == 1 && square_is_ok(to))
{
from = to;
to += directions[idx];
}
if (to == dest && square_distance(from, to) == 1)
return directions[idx];
}
return DELTA_NONE;
}
void init_direction_table() {
for (Square s1 = SQ_A1; s1 <= SQ_H8; s1++)
for (Square s2 = SQ_A1; s2 <= SQ_H8; s2++)
DirectionTable[s1][s2] = uint8_t(get_direction(s1, s2));
}
void init_masks() {
SetMaskBB[SQ_NONE] = 0ULL;