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53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of the device-mapper userspace tools.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _DM_BITSET_H
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#define _DM_BITSET_H
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#include "pool.h"
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#include <limits.h>
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typedef uint32_t *bitset_t;
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bitset_t bitset_create(struct pool *mem, unsigned num_bits);
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void bitset_destroy(bitset_t bs);
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void bit_union(bitset_t out, bitset_t in1, bitset_t in2);
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int bit_get_first(bitset_t bs);
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int bit_get_next(bitset_t bs, int last_bit);
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#define BITS_PER_INT (sizeof(int) * CHAR_BIT)
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#define bit(bs, i) \
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(bs[(i / BITS_PER_INT) + 1] & (0x1 << (i & (BITS_PER_INT - 1))))
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#define bit_set(bs, i) \
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(bs[(i / BITS_PER_INT) + 1] |= (0x1 << (i & (BITS_PER_INT - 1))))
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#define bit_clear(bs, i) \
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(bs[(i / BITS_PER_INT) + 1] &= ~(0x1 << (i & (BITS_PER_INT - 1))))
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#define bit_set_all(bs) \
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memset(bs + 1, -1, ((*bs / BITS_PER_INT) + 1) * sizeof(int))
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#define bit_clear_all(bs) \
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memset(bs + 1, 0, ((*bs / BITS_PER_INT) + 1) * sizeof(int))
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#define bit_copy(bs1, bs2) \
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memcpy(bs1 + 1, bs2 + 1, ((*bs1 / BITS_PER_INT) + 1) * sizeof(int))
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#endif
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