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/*-------------------------------------------------------------------------
*
* bit.c
* Standard bit array code.
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/lib/Attic/bit.c,v 1.15 2002/06/20 20:29:28 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "utils/bit.h"
void
BitArraySetBit(BitArray bitArray, BitIndex bitIndex)
{
bitArray[bitIndex / BITS_PER_BYTE] |=
(1 << (BITS_PER_BYTE - 1 - (bitIndex % BITS_PER_BYTE)));
}
void
BitArrayClearBit(BitArray bitArray, BitIndex bitIndex)
{
bitArray[bitIndex / BITS_PER_BYTE] &=
~(1 << (BITS_PER_BYTE - 1 - (bitIndex % BITS_PER_BYTE)));
}
bool
BitArrayBitIsSet(BitArray bitArray, BitIndex bitIndex)
{
return ((bitArray[bitIndex / BITS_PER_BYTE] &
(1 << (BITS_PER_BYTE - 1 - (bitIndex % BITS_PER_BYTE)))
) != 0);
}
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