/contrib/bind9/lib/dns/include/dns/bit.h

 1/*
 2 * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
 3 * Copyright (C) 2000, 2001  Internet Software Consortium.
 4 *
 5 * Permission to use, copy, modify, and/or distribute this software for any
 6 * purpose with or without fee is hereby granted, provided that the above
 7 * copyright notice and this permission notice appear in all copies.
 8 *
 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id: bit.h,v 1.14 2007/06/19 23:47:16 tbox Exp $ */
19
20#ifndef DNS_BIT_H
21#define DNS_BIT_H 1
22
23/*! \file dns/bit.h */
24
25#include <isc/int.h>
26#include <isc/boolean.h>
27
28typedef isc_uint64_t dns_bitset_t;
29
30#define DNS_BIT_SET(bit, bitset) \
31     (*(bitset) |= ((dns_bitset_t)1 << (bit)))
32#define DNS_BIT_CLEAR(bit, bitset) \
33     (*(bitset) &= ~((dns_bitset_t)1 << (bit)))
34#define DNS_BIT_CHECK(bit, bitset) \
35     ISC_TF((*(bitset) & ((dns_bitset_t)1 << (bit))) \
36	    == ((dns_bitset_t)1 << (bit)))
37
38#endif /* DNS_BIT_H */
39