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35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef UTIL_H
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#define UTIL_H
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#include <stdlib.h>
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#define MALLOC(type) ((type*)calloc(1, sizeof(type)))
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/* bitmap manipulation */
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#define BITS_PER_ITEM(map) (sizeof(map[0])*8)
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#define MASK(pos,map) (1 << ((pos) % (BITS_PER_ITEM(map))))
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#define POS(pos,map) ((pos) / BITS_PER_ITEM(map))
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#define SET_BIT(x, map) (map[POS(x,map)] |= MASK(x,map))
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#define CLR_BIT(x, map) (map[POS(x,map)] &= ~MASK(x,map))
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#define BIT_ISSET(x, map) (map[POS(x,map)] & MASK(x,map))
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#endif
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