1 /* $FreeBSD$ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2012 SRI International 7 * Copyright (c) 1992, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef _LIBNETBSD_SYS_CDEFS_H_ 36 #define _LIBNETBSD_SYS_CDEFS_H_ 37 38 #include_next <sys/cdefs.h> 39 40 #ifndef __dead 41 #ifdef __dead2 42 #define __dead __dead2 43 #else 44 #define __dead 45 #endif 46 #endif /* !__dead */ 47 48 /* 49 * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 50 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 51 * The __CONCAT macro is a bit tricky -- make sure you don't put spaces 52 * in between its arguments. __CONCAT can also concatenate double-quoted 53 * strings produced by the __STRING macro, but this only works with ANSI C. 54 */ 55 56 #define ___STRING(x) __STRING(x) 57 #define ___CONCAT(x,y) __CONCAT(x,y) 58 59 /* 60 * The following macro is used to remove const cast-away warnings 61 * from gcc -Wcast-qual; it should be used with caution because it 62 * can hide valid errors; in particular most valid uses are in 63 * situations where the API requires it, not to cast away string 64 * constants. We don't use *intptr_t on purpose here and we are 65 * explicit about unsigned long so that we don't have additional 66 * dependencies. 67 */ 68 #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a)) 69 70 /* 71 * Return the number of elements in a statically-allocated array, 72 * __x. 73 */ 74 #define __arraycount(__x) (sizeof(__x) / sizeof(__x[0])) 75 76 /* __BIT(n): nth bit, where __BIT(0) == 0x1. */ 77 #define __BIT(__n) \ 78 (((uintmax_t)(__n) >= NBBY * sizeof(uintmax_t)) ? 0 : \ 79 ((uintmax_t)1 << (uintmax_t)((__n) & (NBBY * sizeof(uintmax_t) - 1)))) 80 81 /* __BITS(m, n): bits m through n, m < n. */ 82 #define __BITS(__m, __n) \ 83 ((__BIT(MAX((__m), (__n)) + 1) - 1) ^ (__BIT(MIN((__m), (__n))) - 1)) 84 85 #endif /* _LIBNETBSD_SYS_CDEFS_H_ */ 86