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add funcs comments and const parameters

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This commit is contained in:
Bruno Raoult
2024-03-11 16:06:29 +01:00
parent d81dca6e23
commit 301ca24783
2 changed files with 76 additions and 19 deletions
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79
src/hyperbola-quintessence.c
View File

@@ -86,15 +86,16 @@ void hyperbola_init()
}
/**
* hyperbola_rank_moves() - generate rank moves for a sliding piece.
* hyperbola_rank_moves() - get rank moves for a sliding piece.
* @pieces: occupation bitboard
* @sq: piece square
*
* Rank attacks are not handled by HQ, so we do it with a
* Rank attacks are not handled by HQ, so this function uses a pre-calculated
* rank attacks table (@bb_rank_attacks).
*
* @Return: The moves mask for piece
* @Return: bitboard of @piece available pseudo-moves.
*/
static bitboard_t hyperbola_rank_moves(bitboard_t occ, square_t sq)
bitboard_t hyperbola_rank_moves(bitboard_t occ, square_t sq)
{
u32 rank = sq & SQ_RANKMASK;
u32 file = sq & SQ_FILEMASK;
@@ -109,16 +110,19 @@ static bitboard_t hyperbola_rank_moves(bitboard_t occ, square_t sq)
}
/**
* hyperbola_moves() - generate hyperbola moves mask for a given sliding piece
* hyperbola_moves() - get hyperbola pseudo-moves for a sliding piece
* @pieces: occupation bitboard
* @sq: piece square
* @mask: mask considered
* @mask: the appropriate mask (pre-calculated)
*
* See https://www.chessprogramming.org/Hyperbola_Quintessence
* This function can be used for files, diagonal, and anti-diagonal attacks.
* @mask is the corresponding pre-calculated table (@bb_sqfile, @bb_sqdiag,
* or @bb_sqanti).
* See https://www.chessprogramming.org/Hyperbola_Quintessence for details.
*
* @Return: The moves mask for piece
* @Return: bitboard of piece available pseudo-moves.
*/
static bitboard_t hyperbola_moves(const bitboard_t pieces, const square_t sq,
bitboard_t hyperbola_moves(const bitboard_t pieces, const square_t sq,
const bitboard_t mask)
{
bitboard_t o = pieces & mask;
@@ -130,32 +134,77 @@ static bitboard_t hyperbola_moves(const bitboard_t pieces, const square_t sq,
& mask;
}
static bitboard_t hyperbola_file_moves(bitboard_t occ, square_t sq)
/**
* hyperbola_file_moves() - get file pseudo-moves for a sliding piece.
* @pieces: occupation bitboard
* @sq: piece square
*
* @Return: bitboard of piece available pseudo-moves on its file.
*/
bitboard_t hyperbola_file_moves(const bitboard_t occ, const square_t sq)
{
return hyperbola_moves(occ, sq, bb_sqfile[sq]);
}
static bitboard_t hyperbola_diag_moves(bitboard_t occ, square_t sq)
/**
* hyperbola_diag_moves() - get diagonal pseudo-moves for a sliding piece.
* @pieces: occupation bitboard
* @sq: piece square
*
* @Return: bitboard of piece available pseudo-moves on its diagonal.
*/
bitboard_t hyperbola_diag_moves(const bitboard_t occ, const square_t sq)
{
return hyperbola_moves(occ, sq, bb_sqdiag[sq]);
}
static bitboard_t hyperbola_anti_moves(bitboard_t occ, square_t sq)
/**
* hyperbola_anti_moves() - get anti-diagonal pseudo-moves for a sliding piece.
* @pieces: occupation bitboard
* @sq: piece square
*
* @Return: bitboard of piece available pseudo-moves on its anti-diagonal.
*/
bitboard_t hyperbola_anti_moves(const bitboard_t occ, const square_t sq)
{
return hyperbola_moves(occ, sq, bb_sqanti[sq]);
}
bitboard_t hyperbola_bishop_moves(bitboard_t occ, square_t sq)
/**
* hyperbola_bishop_moves() - get bitboard of bishop pseudo-moves
* @occ: occupation bitboard
* @sq: bishop square
*
* @Return: bitboard of bishop available pseudo-moves.
*/
bitboard_t hyperbola_bishop_moves(const bitboard_t occ, const square_t sq)
{
return hyperbola_diag_moves(occ, sq) | hyperbola_anti_moves(occ, sq);
}
bitboard_t hyperbola_rook_moves(bitboard_t occ, square_t sq)
/**
* hyperbola_rook_moves() - get bitboard of rook pseudo-moves
* @occ: occupation bitboard
* @sq: rook square
*
* @Return: bitboard of rook available pseudo-moves.
*/
bitboard_t hyperbola_rook_moves(const bitboard_t occ, const square_t sq)
{
return hyperbola_file_moves(occ, sq) | hyperbola_rank_moves(occ, sq);
}
bitboard_t hyperbola_queen_moves(bitboard_t occ, square_t sq)
/**
* hyperbola_queen_moves() - get bitboard of queen pseudo-moves
* @occ: occupation bitboard
* @sq: queen square
*
* This function is a wrapper over @hyperbola_bishop_moves() and
* @hyperbola_rook_moves().
*
* @Return: bitboard of queen available pseudo-moves.
*/
bitboard_t hyperbola_queen_moves(const bitboard_t occ, const square_t sq)
{
return hyperbola_bishop_moves(occ, sq) | hyperbola_rook_moves(occ, sq);
}

16
src/hyperbola-quintessence.h
View File

@@ -17,9 +17,17 @@
#include "board.h"
#include "bitboard.h"
void hyperbola_init(void);
extern bitboard_t hyperbola_bishop_moves(bitboard_t occ, square_t sq);
extern bitboard_t hyperbola_rook_moves(bitboard_t occ, square_t sq);
extern bitboard_t hyperbola_queen_moves(bitboard_t occ, square_t sq);
extern void hyperbola_init(void);
extern bitboard_t hyperbola_rank_moves(const bitboard_t occ, const square_t sq);
extern bitboard_t hyperbola_moves(const bitboard_t pieces, const square_t sq,
const bitboard_t mask);
extern bitboard_t hyperbola_file_moves(const bitboard_t occ, const square_t sq);
extern bitboard_t hyperbola_diag_moves(const bitboard_t occ, const square_t sq);
extern bitboard_t hyperbola_anti_moves(const bitboard_t occ, const square_t sq);
extern bitboard_t hyperbola_bishop_moves(const bitboard_t occ, const square_t sq);
extern bitboard_t hyperbola_rook_moves(const bitboard_t occ, const square_t sq);
extern bitboard_t hyperbola_queen_moves(const bitboard_t occ, const square_t sq);
#endif /* _HYPERBOLA_QUINTESSENCE_H */