python/Include/bitset.h at master · charleson/python · GitHub

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#ifndef Py_BITSET_H

#define Py_BITSET_H

#ifdef __cplusplus

extern "C" {

#endif

/* Bitset interface */

#define BYTE char

typedef BYTE *bitset;

bitset newbitset(int nbits);

void delbitset(bitset bs);

#define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0)

int addbit(bitset bs, int ibit); /* Returns 0 if already set */

int samebitset(bitset bs1, bitset bs2, int nbits);

void mergebitset(bitset bs1, bitset bs2, int nbits);

#define BITSPERBYTE (8*sizeof(BYTE))

#define NBYTES(nbits) (((nbits) + BITSPERBYTE - 1) / BITSPERBYTE)

#define BIT2BYTE(ibit) ((ibit) / BITSPERBYTE)

#define BIT2SHIFT(ibit) ((ibit) % BITSPERBYTE)

#define BIT2MASK(ibit) (1 << BIT2SHIFT(ibit))

#define BYTE2BIT(ibyte) ((ibyte) * BITSPERBYTE)

#ifdef __cplusplus

}

#endif

#endif /* !Py_BITSET_H */

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