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85 lines
3.3 KiB
C
85 lines
3.3 KiB
C
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2012 SRI International
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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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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#ifndef _LIBNETBSD_SYS_CDEFS_H_
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#define _LIBNETBSD_SYS_CDEFS_H_
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#include_next <sys/cdefs.h>
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#ifndef __dead
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#ifdef __dead2
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#define __dead __dead2
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#else
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#define __dead
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#endif
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#endif /* !__dead */
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/*
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* The __CONCAT macro is used to concatenate parts of symbol names, e.g.
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* with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
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* The __CONCAT macro is a bit tricky -- make sure you don't put spaces
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* in between its arguments. __CONCAT can also concatenate double-quoted
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* strings produced by the __STRING macro, but this only works with ANSI C.
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*/
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#define ___STRING(x) __STRING(x)
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#define ___CONCAT(x,y) __CONCAT(x,y)
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/*
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* The following macro is used to remove const cast-away warnings
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* from gcc -Wcast-qual; it should be used with caution because it
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* can hide valid errors; in particular most valid uses are in
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* situations where the API requires it, not to cast away string
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* constants. We don't use *intptr_t on purpose here and we are
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* explicit about unsigned long so that we don't have additional
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* dependencies.
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*/
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#define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
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/*
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* Return the number of elements in a statically-allocated array,
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* __x.
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*/
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#define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
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/* __BIT(n): nth bit, where __BIT(0) == 0x1. */
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#define __BIT(__n) \
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(((uintmax_t)(__n) >= NBBY * sizeof(uintmax_t)) ? 0 : \
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((uintmax_t)1 << (uintmax_t)((__n) & (NBBY * sizeof(uintmax_t) - 1))))
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/* __BITS(m, n): bits m through n, m < n. */
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#define __BITS(__m, __n) \
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((__BIT(MAX((__m), (__n)) + 1) - 1) ^ (__BIT(MIN((__m), (__n))) - 1))
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#endif /* _LIBNETBSD_SYS_CDEFS_H_ */
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