2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
134 lines
4.5 KiB
C
134 lines
4.5 KiB
C
/* $NetBSD: bitstring.h,v 1.9 2010/05/06 18:54:22 christos Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Paul Vixie.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)bitstring.h 8.1 (Berkeley) 7/19/93
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*/
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#ifndef _BITSTRING_H_
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#define _BITSTRING_H_
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/* modified for SV/AT and bitstring bugfix by M.R.Murphy, 11oct91
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* bitstr_size changed gratuitously, but shorter
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* bit_alloc spelling error fixed
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* the following were efficient, but didn't work, they've been made to
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* work, but are no longer as efficient :-)
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* bit_nclear, bit_nset, bit_ffc, bit_ffs
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*/
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/*
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* The comment above may or may not bear any resemblance to reality.
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* This code has been maintained in a confusing way, with little
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* information available on the provenance of much of it. "At least it
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* works."
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* /s/ Perry E. Metzger, 2 Feb 98
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*/
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typedef unsigned char bitstr_t;
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/* internal macros */
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/* byte of the bitstring bit is in */
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#define _bit_byte(bit) \
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(uint32_t)((bit) >> 3)
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/* mask for the bit within its byte */
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#define _bit_mask(bit) \
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(uint32_t)((1 << (uint32_t)((bit)&0x7)))
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/* external macros */
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/* bytes in a bitstring of nbits bits */
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#define bitstr_size(nbits) \
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(size_t)((uint32_t)((nbits) + 7) >> 3)
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/* allocate a bitstring */
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#define bit_alloc(nbits) \
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calloc(bitstr_size(nbits), sizeof(bitstr_t))
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/* allocate a bitstring on the stack */
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#define bit_decl(name, nbits) \
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((name)[bitstr_size(nbits)])
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/* is bit N of bitstring name set? */
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#define bit_test(name, bit) \
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/*LINTED bitwise on signed*/((name)[_bit_byte(bit)] & _bit_mask(bit))
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/* set bit N of bitstring name */
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#define bit_set(name, bit) \
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/*LINTED bitwise on signed*/((name)[_bit_byte(bit)] |= _bit_mask(bit))
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/* clear bit N of bitstring name */
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#define bit_clear(name, bit) \
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/*LINTED bitwise on signed*/((name)[_bit_byte(bit)] &= ~_bit_mask(bit))
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/* clear bits start ... stop in bitstring */
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#define bit_nclear(name, start, stop) do { \
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bitstr_t *_name = name; \
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int _start = start, _stop = stop; \
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while (_start <= _stop) { \
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bit_clear(_name, _start); \
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_start++; \
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} \
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} while(/*CONSTCOND*/0)
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/* set bits start ... stop in bitstring */
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#define bit_nset(name, start, stop) do { \
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bitstr_t *_name = name; \
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int _start = start, _stop = stop; \
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while (_start <= _stop) { \
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bit_set(_name, _start); \
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_start++; \
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} \
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} while(/*CONSTCOND*/0)
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/* find first bit clear in name */
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#define bit_ffc(name, nbits, value) do { \
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bitstr_t *_name = name; \
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int _bit, _nbits = nbits, _value = -1; \
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for (_bit = 0; _bit < _nbits; ++_bit) \
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if (!bit_test(_name, _bit)) { \
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_value = _bit; \
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break; \
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} \
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*(value) = _value; \
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} while(/*CONSTCOND*/0)
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/* find first bit set in name */
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#define bit_ffs(name, nbits, value) do { \
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bitstr_t *_name = name; \
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int _bit, _nbits = nbits, _value = -1; \
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for (_bit = 0; _bit < _nbits; ++_bit) \
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if (bit_test(_name, _bit)) { \
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_value = _bit; \
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break; \
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} \
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*(value) = _value; \
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} while(/*CONSTCOND*/0)
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#endif /* !_BITSTRING_H_ */
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