bit.h

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#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