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import typing
def int_to_hexstr(bm: int) -> str:
if bm > 0xFFFF_FFFF_FFFF_FFFF:
return False
return '0x' + '_'.join(f'{bm:016X}'[i : i + 4] for i in range(0, 16, 4))
def fill_bm(bm: int, bits: int) -> int:
filled_bm = 0
for idx in range(64):
if bm & 1 << idx:
if bits & 1:
filled_bm |= 1 << idx
bits >>= 1
return filled_bm
def count_ones(bm: int) -> int:
ctr = 0
for idx in range(64):
ctr += bm >> idx & 1
return ctr
def all_bit_combs(bm: int):
for bit_comb in range(2**count_ones(bm)):
yield fill_bm(bm, bit_comb)
def n_mvs_mask(idx: int) -> int:
bm = 0
for dir in (-6, -10, -17, -15, 6, 10, 17, 15):
new_idx = idx + dir
if abs(new_idx%8 - idx%8) < 3 and new_idx in range(64):
bm |= 1 << new_idx
return bm
def k_mvs_mask(idx: int) -> int:
bm = 0
for dir in (1, -1, -7, -8, -9, 7, 8, 9):
new_idx = idx + dir
if abs(new_idx%8 - idx%8) < 2 and new_idx in range(64):
bm |= 1 << new_idx
return bm
def wp_double_push_mask(idx: int) -> int:
if idx // 8 == 6:
return 1 << (idx - 16)
return 0
def wp_push_mask(idx: int) -> int:
if not idx // 8 == 0:
return 1 << (idx - 8)
return 0
def wp_left_take_mask(idx: int) -> int:
if not idx // 8 == 0 and not idx % 8 == 0:
return 1 << (idx - 9)
return 0
def wp_right_take_mask(idx: int) -> int:
if not idx // 8 == 0 and not idx % 8 == 7:
return 1 << (idx - 7)
return 0
def bp_double_push_mask(idx: int) -> int:
if idx // 8 == 1:
return 1 << (idx + 16)
return 0
def bp_push_mask(idx: int) -> int:
if not idx // 8 == 7:
return 1 << (idx + 8)
return 0
def bp_left_take_mask(idx: int) -> int:
if not idx // 8 == 7 and not idx % 8 == 0:
return 1 << (idx + 7)
return 0
def bp_right_take_mask(idx: int) -> int:
if not idx // 8 == 7 and not idx % 8 == 7:
return 1 << (idx + 9)
return 0
def l_border_slide(idx: int) -> int:
slide_bm = 0
if idx % 8 == 7:
return slide_bm
while True:
idx += 1
slide_bm |= 1 << idx
if idx % 8 == 7:
return slide_bm
def l_slide(bm: int, idx: int) -> int:
slide_bm = 0
if idx % 8 == 7:
return slide_bm
while True:
idx += 1
slide_bm |= 1 << idx
if idx % 8 == 7 or bm & 1 << idx:
return slide_bm
def r_border_slide(idx: int) -> int:
slide_bm = 0
if idx % 8 == 0:
return slide_bm
while True:
idx -= 1
slide_bm |= 1 << idx
if idx % 8 == 0:
return slide_bm
def r_slide(bm: int, idx: int) -> int:
slide_bm = 0
if idx % 8 == 0:
return slide_bm
while True:
idx -= 1
slide_bm |= 1 << idx
if idx % 8 == 0 or bm & 1 << idx:
return slide_bm
def u_border_slide(idx: int) -> int:
slide_bm = 0
if idx // 8 == 7:
return slide_bm
while True:
idx += 8
slide_bm |= 1 << idx
if idx // 8 == 7:
return slide_bm
def u_slide(bm: int, idx: int) -> int:
slide_bm = 0
if idx // 8 == 7:
return slide_bm
while True:
idx += 8
slide_bm |= 1 << idx
if idx // 8 == 7 or bm & 1 << idx:
return slide_bm
def d_border_slide(idx: int) -> int:
slide_bm = 0
if idx // 8 == 0:
return slide_bm
while True:
idx -= 8
slide_bm |= 1 << idx
if idx // 8 == 0:
return slide_bm
def d_slide(bm: int, idx: int) -> int:
slide_bm = 0
if idx // 8 == 0:
return slide_bm
while True:
idx -= 8
slide_bm |= 1 << idx
if idx // 8 == 0 or bm & 1 << idx:
return slide_bm
def lu_border_slide(idx: int) -> int:
slide_bm = 0
if idx % 8 == 7 or idx // 8 == 7:
return slide_bm
while True:
idx += 9
slide_bm |= 1 << idx
if idx % 8 == 7 or idx // 8 == 7:
return slide_bm
def lu_slide(bm: int, idx: int) -> int:
slide_bm = 0
if idx % 8 == 7 or idx // 8 == 7:
return slide_bm
while True:
idx += 9
slide_bm |= 1 << idx
if idx % 8 == 7 or idx // 8 == 7 or bm & 1 << idx:
return slide_bm
def ld_border_slide(idx: int) -> int:
slide_bm = 0
if idx % 8 == 7 or idx // 8 == 0:
return slide_bm
while True:
idx -= 7
slide_bm |= 1 << idx
if idx % 8 == 7 or idx // 8 == 0:
return slide_bm
def ld_slide(bm: int, idx: int) -> int:
slide_bm = 0
if idx % 8 == 7 or idx // 8 == 0:
return slide_bm
while True:
idx -= 7
slide_bm |= 1 << idx
if idx % 8 == 7 or idx // 8 == 0 or bm & 1 << idx:
return slide_bm
def ru_border_slide(idx: int) -> int:
slide_bm = 0
if idx % 8 == 0 or idx // 8 == 7:
return slide_bm
while True:
idx += 7
slide_bm |= 1 << idx
if idx % 8 == 0 or idx // 8 == 7:
return slide_bm
def ru_slide(bm: int, idx: int) -> int:
slide_bm = 0
if idx % 8 == 0 or idx // 8 == 7:
return slide_bm
while True:
idx += 7
slide_bm |= 1 << idx
if idx % 8 == 0 or idx // 8 == 7 or bm & 1 << idx:
return slide_bm
def rd_border_slide(idx: int) -> int:
slide_bm = 0
if idx % 8 == 0 or idx // 8 == 0:
return slide_bm
while True:
idx -= 9
slide_bm |= 1 << idx
if idx % 8 == 0 or idx // 8 == 0:
return slide_bm
def rd_slide(bm: int, idx: int) -> int:
slide_bm = 0
if idx % 8 == 0 or idx // 8 == 0:
return slide_bm
while True:
idx -= 9
slide_bm |= 1 << idx
if idx % 8 == 0 or idx // 8 == 0 or bm & 1 << idx:
return slide_bm
direction_sliding_func = {
'L': l_slide, 'R': r_slide, 'U': u_slide, 'D': d_slide,
'LU': lu_slide, 'LD': ld_slide, 'RU': ru_slide, 'RD': rd_slide,
}
direction_border_sliding_func = {
'L': l_border_slide, 'R': r_border_slide, 'U': u_border_slide, 'D': d_border_slide,
'LU': lu_border_slide, 'LD': ld_border_slide, 'RU': ru_border_slide, 'RD': rd_border_slide,
}
def write_8x8_table(function: typing.Callable[[int], int], file_name: str = '8x8_table.py', tuple_name: str = 'TABLE', overwrite: bool = False) -> None:
f = open(file_name, 'w' if overwrite else 'a')
f.write(tuple_name + ' = (')
for idx in range(64):
if idx % 8 == 0:
f.write('\n ')
f.write(int_to_hexstr(function(idx)) + ', ')
f.write('\n)\n')
def write_comb_dict(border_func: int, sliding_func: typing.Callable[[int, int], int], file_name: str = 'blocker_comb_table.py', tuple_name: str = 'BLOCKER_COMBS', overwrite: bool = False) -> None:
f = open(file_name, 'w' if overwrite else 'a')
f.write(tuple_name + ' = (')
for idx in range(64):
f.write('\n {')
for ctr, bit_comb in enumerate(all_bit_combs(border_func(idx))):
if ctr % 4 == 0:
f.write('\n ')
f.write(int_to_hexstr(bit_comb) + ': ' + int_to_hexstr(sliding_func(bit_comb, idx)) + ', ')
f.write('\n }, ')
f.write('\n)\n')
def write_piece_move_tables(file_name: str = 'piece_move_tables.py', overwrite: bool = True) -> None:
if overwrite:
open(file_name, 'w')
func_dict = {'N': n_mvs_mask, 'K': k_mvs_mask, 'WP_DOUBLE_PUSH': wp_double_push_mask, 'WP_PUSH': wp_push_mask, 'WP_LEFT_TAKE': wp_left_take_mask, 'WP_RIGHT_TAKE': wp_right_take_mask, 'BP_DOUBLE_PUSH': bp_double_push_mask, 'BP_PUSH': bp_push_mask, 'BP_LEFT_TAKE': bp_left_take_mask, 'BP_RIGHT_TAKE': bp_right_take_mask}
for piece, func in func_dict.items():
write_8x8_table(func, file_name, piece + '_MASK')
for direction in ('L', 'R', 'U', 'D', 'LU', 'LD', 'RU', 'RD'):
write_8x8_table(direction_border_sliding_func[direction], file_name, direction + '_BORDER_MASK')
for direction in ('L', 'R', 'U', 'D', 'LU', 'LD', 'RU', 'RD'):
write_comb_dict(direction_border_sliding_func[direction], direction_sliding_func[direction], file_name, direction + '_MASK')
if __name__ == '__main__':
write_piece_move_tables()
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