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920dae64 AT |
1 | |
2 | #ifndef Py_BITSET_H | |
3 | #define Py_BITSET_H | |
4 | #ifdef __cplusplus | |
5 | extern "C" { | |
6 | #endif | |
7 | ||
8 | /* Bitset interface */ | |
9 | ||
10 | #define BYTE char | |
11 | ||
12 | typedef BYTE *bitset; | |
13 | ||
14 | bitset newbitset(int nbits); | |
15 | void delbitset(bitset bs); | |
16 | #define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0) | |
17 | int addbit(bitset bs, int ibit); /* Returns 0 if already set */ | |
18 | int samebitset(bitset bs1, bitset bs2, int nbits); | |
19 | void mergebitset(bitset bs1, bitset bs2, int nbits); | |
20 | ||
21 | #define BITSPERBYTE (8*sizeof(BYTE)) | |
22 | #define NBYTES(nbits) (((nbits) + BITSPERBYTE - 1) / BITSPERBYTE) | |
23 | ||
24 | #define BIT2BYTE(ibit) ((ibit) / BITSPERBYTE) | |
25 | #define BIT2SHIFT(ibit) ((ibit) % BITSPERBYTE) | |
26 | #define BIT2MASK(ibit) (1 << BIT2SHIFT(ibit)) | |
27 | #define BYTE2BIT(ibyte) ((ibyte) * BITSPERBYTE) | |
28 | ||
29 | #ifdef __cplusplus | |
30 | } | |
31 | #endif | |
32 | #endif /* !Py_BITSET_H */ |