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#ifndef Py_BITSET_H
#define Py_BITSET_H
#ifdef __cplusplus
extern "C" {
#endif
/***********************************************************
Copyright (c) 2000, BeOpen.com.
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
All rights reserved.
See the file "Misc/COPYRIGHT" for information on usage and
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
******************************************************************/
/* Bitset interface */
#define BYTE char
typedef BYTE *bitset;
bitset newbitset Py_PROTO((int nbits));
void delbitset Py_PROTO((bitset bs));
#define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0)
int addbit Py_PROTO((bitset bs, int ibit)); /* Returns 0 if already set */
int samebitset Py_PROTO((bitset bs1, bitset bs2, int nbits));
void mergebitset Py_PROTO((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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