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