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46 lines
1.9 KiB
C
46 lines
1.9 KiB
C
/***********************************************************
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Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Bitset interface */
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#define BYTE char
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typedef BYTE *bitset;
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bitset newbitset PROTO((int nbits));
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void delbitset PROTO((bitset bs));
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/* int testbit PROTO((bitset bs, int ibit)); /* Now a macro, see below */
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int addbit PROTO((bitset bs, int ibit)); /* Returns 0 if already set */
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int samebitset PROTO((bitset bs1, bitset bs2, int nbits));
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void mergebitset PROTO((bitset bs1, bitset bs2, int nbits));
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#define BITSPERBYTE (8*sizeof(BYTE))
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#define NBYTES(nbits) (((nbits) + BITSPERBYTE - 1) / BITSPERBYTE)
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#define BIT2BYTE(ibit) ((ibit) / BITSPERBYTE)
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#define BIT2SHIFT(ibit) ((ibit) % BITSPERBYTE)
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#define BIT2MASK(ibit) (1 << BIT2SHIFT(ibit))
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#define BYTE2BIT(ibyte) ((ibyte) * BITSPERBYTE)
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#define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0)
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