| Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
| Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 2 | Copyright (c) 2000, BeOpen.com. |
| 3 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 4 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 5 | All rights reserved. |
| Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 6 | |
| Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 7 | See the file "Misc/COPYRIGHT" for information on usage and |
| 8 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 9 | ******************************************************************/ |
| 10 | |
| Fred Drake | 5eb6d4e | 2000-07-08 23:37:28 +0000 | [diff] [blame^] | 11 | #ifndef Py_BITSET_H |
| 12 | #define Py_BITSET_H |
| 13 | #ifdef __cplusplus |
| 14 | extern "C" { |
| 15 | #endif |
| 16 | |
| Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 17 | /* Bitset interface */ |
| 18 | |
| 19 | #define BYTE char |
| 20 | |
| 21 | typedef BYTE *bitset; |
| 22 | |
| Fred Drake | 5eb6d4e | 2000-07-08 23:37:28 +0000 | [diff] [blame^] | 23 | bitset newbitset(int nbits); |
| 24 | void delbitset(bitset bs); |
| Guido van Rossum | 66cb311 | 1994-12-30 15:33:50 +0000 | [diff] [blame] | 25 | #define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0) |
| Fred Drake | 5eb6d4e | 2000-07-08 23:37:28 +0000 | [diff] [blame^] | 26 | int addbit(bitset bs, int ibit); /* Returns 0 if already set */ |
| 27 | int samebitset(bitset bs1, bitset bs2, int nbits); |
| 28 | void mergebitset(bitset bs1, bitset bs2, int nbits); |
| Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 29 | |
| 30 | #define BITSPERBYTE (8*sizeof(BYTE)) |
| 31 | #define NBYTES(nbits) (((nbits) + BITSPERBYTE - 1) / BITSPERBYTE) |
| 32 | |
| 33 | #define BIT2BYTE(ibit) ((ibit) / BITSPERBYTE) |
| 34 | #define BIT2SHIFT(ibit) ((ibit) % BITSPERBYTE) |
| 35 | #define BIT2MASK(ibit) (1 << BIT2SHIFT(ibit)) |
| 36 | #define BYTE2BIT(ibyte) ((ibyte) * BITSPERBYTE) |
| 37 | |
| Guido van Rossum | a330996 | 1993-07-28 09:05:47 +0000 | [diff] [blame] | 38 | #ifdef __cplusplus |
| 39 | } |
| 40 | #endif |
| 41 | #endif /* !Py_BITSET_H */ |