Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | 5113f5f | 1992-04-05 14:20:22 +0000 | [diff] [blame] | 2 | Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 3 | Netherlands. |
| 4 | |
| 5 | All Rights Reserved |
| 6 | |
| 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
| 9 | provided that the above copyright notice appear in all copies and that |
| 10 | both that copyright notice and this permission notice appear in |
| 11 | supporting documentation, and that the names of Stichting Mathematisch |
| 12 | Centrum or CWI not be used in advertising or publicity pertaining to |
| 13 | distribution of the software without specific, written prior permission. |
| 14 | |
| 15 | STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| 16 | THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 17 | FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE |
| 18 | FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| 21 | OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 22 | |
| 23 | ******************************************************************/ |
| 24 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 25 | /* Bitset interface */ |
| 26 | |
| 27 | #define BYTE char |
| 28 | |
| 29 | typedef BYTE *bitset; |
| 30 | |
| 31 | bitset newbitset PROTO((int nbits)); |
| 32 | void delbitset PROTO((bitset bs)); |
| 33 | /* int testbit PROTO((bitset bs, int ibit)); /* Now a macro, see below */ |
| 34 | int addbit PROTO((bitset bs, int ibit)); /* Returns 0 if already set */ |
| 35 | int samebitset PROTO((bitset bs1, bitset bs2, int nbits)); |
| 36 | void mergebitset PROTO((bitset bs1, bitset bs2, int nbits)); |
| 37 | |
| 38 | #define BITSPERBYTE (8*sizeof(BYTE)) |
| 39 | #define NBYTES(nbits) (((nbits) + BITSPERBYTE - 1) / BITSPERBYTE) |
| 40 | |
| 41 | #define BIT2BYTE(ibit) ((ibit) / BITSPERBYTE) |
| 42 | #define BIT2SHIFT(ibit) ((ibit) % BITSPERBYTE) |
| 43 | #define BIT2MASK(ibit) (1 << BIT2SHIFT(ibit)) |
| 44 | #define BYTE2BIT(ibyte) ((ibyte) * BITSPERBYTE) |
| 45 | |
| 46 | #define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0) |