mirror of
https://github.com/python/cpython.git
synced 2024-11-25 19:03:49 +08:00
33 lines
792 B
C
33 lines
792 B
C
|
|
#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 */
|