bitstring.h revision 199767f8919635c4928607450d9e0abb932109ce
/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Paul Vixie.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SYS_BITSTRING_H_
#define _SYS_BITSTRING_H_
typedef unsigned char bitstr_t;
/* internal macros */
/* byte of the bitstring bit is in */
((bit) >> 3)
/* mask for the bit within its byte */
/* external macros */
/* bytes in a bitstring of nbits bits */
#define bitstr_size(nbits) \
/* allocate a bitstring */
/* allocate a bitstring on the stack */
/* is bit N of bitstring name set? */
/* set bit N of bitstring name */
/* clear bit N of bitstring name */
/* clear bits start ... stop in bitstring */
if (_startbyte == _stopbyte) { \
} else { \
while (++_startbyte < _stopbyte) \
_name[_startbyte] = 0; \
} \
} while (0)
/* set bits start ... stop in bitstring */
if (_startbyte == _stopbyte) { \
} else { \
while (++_startbyte < _stopbyte) \
} \
} while (0)
/* find first bit clear in name */
if (_nbits > 0) \
break; \
} \
_value = -1; \
} while (0)
/* find first bit set in name */
if (_nbits > 0) \
break; \
} \
_value = -1; \
} while (0)
#endif /* !_SYS_BITSTRING_H_ */