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Introduce Bitboards namespace

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No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-04-01 10:46:38 +01:00
parent adb71b8096
commit 9bbd27a80f
3 changed files with 29 additions and 24 deletions
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41
src/bitboard.cpp
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@@ -68,24 +68,6 @@ namespace {
Bitboard masks[], unsigned shifts[], Square deltas[], Fn index);
}
/// print_bitboard() prints a bitboard in an easily readable format to the
/// standard output. This is sometimes useful for debugging.
void print_bitboard(Bitboard b) {
for (Rank r = RANK_8; r >= RANK_1; r--)
{
std::cout << "+---+---+---+---+---+---+---+---+" << '\n';
for (File f = FILE_A; f <= FILE_H; f++)
std::cout << "| " << ((b & make_square(f, r)) ? "X " : " ");
std::cout << "|\n";
}
std::cout << "+---+---+---+---+---+---+---+---+" << std::endl;
}
/// first_1() finds the least significant nonzero bit in a nonzero bitboard.
/// pop_1st_bit() finds and clears the least significant nonzero bit in a
/// nonzero bitboard.
@@ -166,10 +148,29 @@ Square last_1(Bitboard b) {
#endif // !defined(USE_BSFQ)
/// bitboards_init() initializes various bitboard arrays. It is called during
/// Bitboards::print() prints a bitboard in an easily readable format to the
/// standard output. This is sometimes useful for debugging.
void Bitboards::print(Bitboard b) {
for (Rank rank = RANK_8; rank >= RANK_1; rank--)
{
std::cout << "+---+---+---+---+---+---+---+---+" << '\n';
for (File file = FILE_A; file <= FILE_H; file++)
std::cout << "| " << ((b & make_square(file, rank)) ? "X " : " ");
std::cout << "|\n";
}
std::cout << "+---+---+---+---+---+---+---+---+" << std::endl;
}
/// Bitboards::init() initializes various bitboard arrays. It is called during
/// program initialization.
void bitboards_init() {
void Bitboards::init() {
for (int k = 0, i = 0; i < 8; i++)
while (k < (2 << i))