edax-reversi/bit_8h_source.html

#ifndef EDAX_BIT_H

#define EDAX_BIT_H


#include <stdio.h>


#ifdef DLL_BUILD

#define DLL_API __declspec(dllexport)

#else

#define DLL_API

#endif


struct Random;


/* declaration */

DLL_API int bit_count(unsigned long long);

int bit_weighted_count(const unsigned long long);

DLL_API int first_bit(unsigned long long);

int next_bit(unsigned long long*);

DLL_API int last_bit(unsigned long long);

void bitboard_write(const unsigned long long, FILE*);

unsigned long long transpose(unsigned long long);

unsigned long long vertical_mirror(unsigned long long);

unsigned long long horizontal_mirror(unsigned long long);

unsigned int bswap_int(unsigned int);

unsigned short bswap_short(unsigned short);

int get_rand_bit(unsigned long long, struct Random*);


#define foreach_bit(i, b) for (i = first_bit(b); b; i = next_bit(&b))


extern const unsigned long long X_TO_BIT[];

#define x_to_bit(x) X_TO_BIT[x]


//#define x_to_bit(x) (1ULL << (x)) // 1% slower on Sandy Bridge


#endif


last_bit
DLL_API int last_bit(unsigned long long)
Search the last bit set (same as log2()).
Definition: bit.c:264

bswap_int
unsigned int bswap_int(unsigned int)
Mirror the unsigned int (little <-> big endian).
Definition: bit.c:401

horizontal_mirror
unsigned long long horizontal_mirror(unsigned long long)
Mirror the unsigned long long (exchange the line 1 - 8, 2 - 7, 3 - 6 & 4 - 5).
Definition: bit.c:377

bit_count
DLL_API int bit_count(unsigned long long)
Count the number of bits set to one in an unsigned long long.
Definition: bit.c:72

get_rand_bit
int get_rand_bit(unsigned long long, struct Random *)
Get a random set bit index.
Definition: bit.c:415

DLL_API
#define DLL_API
Definition: bit.h:19

bit_weighted_count
int bit_weighted_count(const unsigned long long)
count the number of discs, counting the corners twice.
Definition: bit.c:143

vertical_mirror
unsigned long long vertical_mirror(unsigned long long)
Mirror the unsigned long long (exchange the lines A - H, B - G, C - F & D - E.).
Definition: bit.c:364

next_bit
int next_bit(unsigned long long *)
Search the next bit set.
Definition: bit.c:248

transpose
unsigned long long transpose(unsigned long long)
Transpose the unsigned long long (symetry % A1-H8 diagonal).
Definition: bit.c:345

first_bit
DLL_API int first_bit(unsigned long long)
Search the first bit set.
Definition: bit.c:173

X_TO_BIT
const unsigned long long X_TO_BIT[]
Definition: bit.c:18

bitboard_write
void bitboard_write(const unsigned long long, FILE *)
Print an unsigned long long as a board.
Definition: bit.c:435

bswap_short
unsigned short bswap_short(unsigned short)
Swap bytes of a short (little <-> big endian).
Definition: bit.c:391

Random
Definition: util.h:87