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Diffstat (limited to 'include/python2.7/bitset.h')
| -rw-r--r-- | include/python2.7/bitset.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/python2.7/bitset.h b/include/python2.7/bitset.h new file mode 100644 index 0000000..faeb419 --- /dev/null +++ b/include/python2.7/bitset.h @@ -0,0 +1,32 @@ + +#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 */ |