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