| #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 */ |