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- #ifndef Py_BITSET_H
- #define Py_BITSET_H
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /***********************************************************
- Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
- The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI or Corporation for National Research Initiatives or
- CNRI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior
- permission.
-
- While CWI is the initial source for this software, a modified version
- is made available by the Corporation for National Research Initiatives
- (CNRI) at the Internet address ftp://ftp.python.org.
-
- STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
- REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
- CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
- DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* 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 */
-