Differential D22012 Diff 110007 contrib/dhcpcd/src/common.h

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contrib/dhcpcd/src/common.h

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				/* SPDX-License-Identifier: BSD-2-Clause */
				/*
				* dhcpcd - DHCP client daemon
				* Copyright (c) 2006-2021 Roy Marples <roy@marples.name>
				* All rights reserved

				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*/

				#ifndef COMMON_H
				#define COMMON_H

				#include <sys/param.h>
				#include <sys/time.h>
				#include <sys/types.h>
				#include <stdint.h>
				#include <stdio.h>

				/* Define eloop queues here, as other apps share eloop.h */
				#define ELOOP_DHCPCD 1 /* default queue */
				#define ELOOP_DHCP 2
				#define ELOOP_ARP 3
				#define ELOOP_IPV4LL 4
				#define ELOOP_IPV6 5
				#define ELOOP_IPV6ND 6
				#define ELOOP_IPV6RA_EXPIRE 7
				#define ELOOP_DHCP6 8
				#define ELOOP_IF 9

				#ifndef HOSTNAME_MAX_LEN
				#define HOSTNAME_MAX_LEN 250 /* 255 - 3 (FQDN) - 2 (DNS enc) */
				#endif

				#ifndef MIN
				#define MIN(a,b) ((/CONSTCOND/(a)<(b))?(a):(b))
				#define MAX(a,b) ((/CONSTCOND/(a)>(b))?(a):(b))
				#endif

				#define UNCONST(a) ((void )(unsigned long)(const void )(a))
				#define STRINGIFY(a) #a
				#define TOSTRING(a) STRINGIFY(a)
				#define UNUSED(a) (void)(a)

				#define ROUNDUP4(a) (1 + (((a) - 1) \| 3))
				#define ROUNDUP8(a) (1 + (((a) - 1) \| 7))

				/* Some systems don't define timespec macros */
				#ifndef timespecclear
				#define timespecclear(tsp) (tsp)->tv_sec = (time_t)((tsp)->tv_nsec = 0L)
				#define timespecisset(tsp) ((tsp)->tv_sec \|\| (tsp)->tv_nsec)
				#endif

				#if __GNUC__ > 2 \|\| defined(__INTEL_COMPILER)
				# ifndef __packed
				# define __packed __attribute__((__packed__))
				# endif
				# ifndef __unused
				# define __unused __attribute__((__unused__))
				# endif
				#else
				# ifndef __packed
				# define __packed
				# endif
				# ifndef __unused
				# define __unused
				# endif
				#endif

				/* Needed for rbtree(3) compat */
				#ifndef __RCSID
				#define __RCSID(a)
				#endif
				#ifndef __predict_false
				# if __GNUC__ > 2
				# define __predict_true(exp) __builtin_expect((exp) != 0, 1)
				# define __predict_false(exp) __builtin_expect((exp) != 0, 0)
				#else
				# define __predict_true(exp) (exp)
				# define __predict_false(exp) (exp)
				# endif
				#endif
				#ifndef __BEGIN_DECLS
				# if defined(__cplusplus)
				# define __BEGIN_DECLS extern "C" {
				# define __END_DECLS };
				# else /* __BEGIN_DECLS */
				# define __BEGIN_DECLS
				# define __END_DECLS
				# endif /* __BEGIN_DECLS */
				#endif /* __BEGIN_DECLS */

				#ifndef __fallthrough
				# if __GNUC__ >= 7
				# define __fallthrough __attribute__((fallthrough))
				# else
				# define __fallthrough
				# endif
				#endif

				/*
				* Compile Time Assertion.
				*/
				#ifndef __CTASSERT
				# ifdef __COUNTER__
				# define __CTASSERT(x) __CTASSERT0(x, __ctassert, __COUNTER__)
				# else
				# define __CTASSERT(x) __CTASSERT99(x, __INCLUDE_LEVEL__, __LINE__)
				# define __CTASSERT99(x, a, b) __CTASSERT0(x, __CONCAT(__ctassert,a), \
				__CONCAT(_,b))
				# endif
				# define __CTASSERT0(x, y, z) __CTASSERT1(x, y, z)
				# define __CTASSERT1(x, y, z) typedef char y ## z[/CONSTCOND/(x) ? 1 : -1] __unused
				#endif

				#ifndef __arraycount
				# define __arraycount(__x) (sizeof(__x) / sizeof(__x[0]))
				#endif

				/* We don't really need this as our supported systems define __restrict
				* automatically for us, but it is here for completeness. */
				#ifndef __restrict
				# if defined(__lint__)
				# define __restrict
				# elif __STDC_VERSION__ >= 199901L
				# define __restrict restrict
				# elif !(2 < __GNUC__ \|\| (2 == __GNU_C && 95 <= __GNUC_VERSION__))
				# define __restrict
				# endif
				#endif

				const char hwaddr_ntoa(const void , size_t, char *, size_t);
				size_t hwaddr_aton(uint8_t , const char );
				ssize_t readfile(const char , void , size_t);
				ssize_t writefile(const char , mode_t, const void , size_t);
				int filemtime(const char , time_t );
				char get_line(char * __restrict, ssize_t * __restrict);
				int is_root_local(void);
				#endif