#ifndef Py_BITSET_H#define Py_BITSET_H#ifdef __cplusplusextern "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 */