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#ifndef Py_BITSET_H
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#define Py_BITSET_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Bitset interface */
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#define BYTE char
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typedef BYTE *bitset;
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bitset newbitset(int nbits);
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void delbitset(bitset bs);
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#define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0)
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int addbit(bitset bs, int ibit); /* Returns 0 if already set */
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int samebitset(bitset bs1, bitset bs2, int nbits);
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void mergebitset(bitset bs1, bitset bs2, int nbits);
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#define BITSPERBYTE (8*sizeof(BYTE))
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#define NBYTES(nbits) (((nbits) + BITSPERBYTE - 1) / BITSPERBYTE)
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#define BIT2BYTE(ibit) ((ibit) / BITSPERBYTE)
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#define BIT2SHIFT(ibit) ((ibit) % BITSPERBYTE)
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#define BIT2MASK(ibit) (1 << BIT2SHIFT(ibit))
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#define BYTE2BIT(ibyte) ((ibyte) * BITSPERBYTE)
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_BITSET_H */
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