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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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