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add sq_line array, bb_sq_aligned3, renamed sq_manh to sq_taxi

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Bruno Raoult
2024-03-11 16:04:45 +01:00
parent 87e7695873
commit d81dca6e23
5 changed files with 112 additions and 19 deletions
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20
src/board.h
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@@ -59,14 +59,28 @@ static __always_inline rank_t sq_rank(square_t square)
#define sq_ok(sq) ((sq) >= A1 && (sq) <= H8)
#define sq_coord_ok(c) ((c) >= 0 && (c) < 8)
/* Chebyshev distance: max( |r2 - r1|, |f2 - f1| )
/**
* sq_dist() - Chebyshev (king) distance between two squares (macro).
* @sq1, @sq2: The two squares.
*
* See: https://www.chessprogramming.org/Distance
* Distance is max( |r2 - r1|, |f2 - f1| )
*
* @Return: the Chebyshev distance.
*/
#define sq_dist(sq1, sq2) (max(abs(sq_file(sq2) - sq_file(sq1)), \
abs(sq_rank(sq2) - sq_rank(sq1))))
/* Manhattan distance: |r2 - r1| + |f2 - f1|
/**
* sq_taxi() - Manhattan (taxi) distance between two squares (macro).
* @sq1, @sq2: The two squares.
*
* See: https://www.chessprogramming.org/Distance
* Distance is |r2 - r1| + |f2 - f1|.
*
* @Return: the Manhattan distance.
*/
#define sq_manh(sq1, sq2) (abs(sq_file(sq2) - sq_file(sq1)) + \
#define sq_taxi(sq1, sq2) (abs(sq_file(sq2) - sq_file(sq1)) + \
abs(sq_rank(sq2) - sq_rank(sq1)))
extern const char *sq_to_string(const square_t sq);