Skip to main content

Browse the archive

Staging
v0.5.1
Revision eb96c376994cb7c6c2e8a4967782d1c0e2a96135 authored by Ned Deily on 02 May 2018, 07:41:45 UTC, committed by Ned Deily on 02 May 2018, 07:41:45 UTC 
3.7.0b4
1 parent 3c5d3f5
Raw File
bitset.h 

#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 */
back to top