bitboard.h File Reference

#include "../defs.h"

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Macros
#define	POP(b)
#define	CNT(b)

Functions
int	popLSB (U64 *bb)
	Pops the least significant 1-bit from a bitboard and returns its index (0–63).
int	countSetBits (U64 b)
	Counts the number of 1-bits in a bitboard.
void	printBitBoard (U64 bb)
	Prints a visual representation of a bitboard to stdout.

Variables
const int	BitTable [64]
	Lookup table for bit index extraction.

Macro Definition Documentation

CNT

#define CNT

(

b

)

Value:

countSetBits(b)

Definition at line 6 of file bitboard.h.

Referenced by isBoardStateValid().

POP

#define POP

(

b

)

Value:

popLSB(b)

Definition at line 5 of file bitboard.h.

Referenced by isBoardStateValid().

Function Documentation

countSetBits()

int countSetBits ( U64 b )

extern

Counts the number of 1-bits in a bitboard.

Parameters

b	Bitboard value.

Returns

Number of set bits.

Definition at line 21 of file bitboards.cpp.

popLSB()

int popLSB ( U64 * bb )

extern

Pops the least significant 1-bit from a bitboard and returns its index (0–63).

Parameters

bb	Pointer to the bitboard to modify.

Returns

Index (0–63) of the popped bit.

Definition at line 14 of file bitboards.cpp.

References BitTable.

printBitBoard()

void printBitBoard ( U64 bb )

extern

Prints a visual representation of a bitboard to stdout.

'X' marks set bits, '-' marks unset bits.

Parameters

bb	Bitboard to print.

Definition at line 27 of file bitboards.cpp.

References FILE_A, FILE_H, FR2SQ, RANK_1, RANK_8, and SQ64.

Variable Documentation

BitTable

const int BitTable[64]

extern

Lookup table for bit index extraction.

Definition at line 7 of file bitboards.cpp.

Referenced by popLSB().