compat.h

/*
 * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef COMPAT_H
#define COMPAT_H

#include "config.h"

#include <sys/types.h>
#include <sys/uio.h>

#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>

#if HAVE_ENDIAN_H
# include <endian.h>
#elif HAVE_SYS_ENDIAN_H
# include <sys/endian.h>
#elif HAVE_LIBKERN_OSBYTEORDER_H
# include <machine/endian.h>
# include <libkern/OSByteOrder.h>

# define htobe16(x) OSSwapHostToBigInt16(x)
# define htole16(x) OSSwapHostToLittleInt16(x)
# define be16toh(x) OSSwapBigToHostInt16(x)
# define le16toh(x) OSSwapLittleToHostInt16(x)

# define htobe32(x) OSSwapHostToBigInt32(x)
# define htole32(x) OSSwapHostToLittleInt32(x)
# define be32toh(x) OSSwapBigToHostInt32(x)
# define le32toh(x) OSSwapLittleToHostInt32(x)

# define htobe64(x) OSSwapHostToBigInt64(x)
# define htole64(x) OSSwapHostToLittleInt64(x)
# define be64toh(x) OSSwapBigToHostInt64(x)
# define le64toh(x) OSSwapLittleToHostInt64(x)
#else
# error no compatible endian.h header found
#endif

#ifdef HAVE_QUEUE_H
# include <sys/queue.h>
#else
# include "compat/queue.h"
#endif

#ifdef HAVE_IMSG
# include <imsg.h>
#else
# include "compat/imsg.h"
#endif

#ifdef HAVE_LIBUTIL
# include <ohash.h>
# include <util.h>
#else
# include "compat/ohash.h"
# define FMT_SCALED_STRSIZE      7       /* minus sign, 4 digits, suffix, null byte */
int		 scan_scaled(char *, long long *);
int		 fmt_scaled(long long, char *);
#endif

#ifndef HAVE_ASPRINTF
int		 asprintf(char**, const char*, ...);
int		 vasprintf(char**, const char*, va_list);
#endif

#ifndef HAVE_ERR
void		 err(int, const char*, ...);
void		 errx(int, const char*, ...);
void		 warn(int, const char*, ...);
void		 warnx(int, const char*, ...);
#else
# include <err.h>
#endif

#ifndef HAVE_EXPLICIT_BZERO
void		 explicit_bzero(void *, size_t);
#endif

#ifndef HAVE_FREEZERO
void		 freezero(void*, size_t);
#endif

#ifndef HAVE_GETDTABLECOUNT
int		 getdtablecount(void);
#endif

#ifndef HAVE_GETDTABLESIZE
int		 getdtablesize(void);
#endif

#ifndef HAVE_FGETLN
char 		*fgetln(FILE *, size_t *);
#endif

#ifndef HAVE_FPARSELN
char 		*fparseln(FILE *, size_t *, size_t *, const char [3], int);
#endif

#ifndef HAVE_GETPROGNAME
const char	*getprogname(void);
#endif

#ifdef HAVE_LIBUTIL_H
#include <libutil.h>
#endif

#ifndef HAVE_MEMMEM
void		*memmem(const void*, size_t, const void*, size_t);
#endif

#ifndef HAVE_REALLOCARRAY
void		*reallocarray(void*, size_t, size_t);
#endif

#ifndef HAVE_RECALLOCARRAY
void		*recallocarray(void*, size_t, size_t, size_t);
#endif

#ifndef HAVE_STRCASESTR
char		*strcasestr(const char *, const char *);
#endif

#ifndef HAVE_STRLCPY
size_t		 strlcpy(char*, const char*, size_t);
#endif

#ifndef HAVE_STRLCAT
size_t		 strlcat(char*, const char*, size_t);
#endif

#ifndef HAVE_STRSEP
char		*strsep(char**, const char*);
#endif

#ifndef HAVE_STRTONUM
long long	 strtonum(const char*, long long, long long, const char**);
#endif

#ifndef HAVE_SETPROCTITLE
void		 setproctitle(const char*, ...);
#endif

/* Needed for Darwin (MacOS) to keep fparseln() happy -- but could also be
 * used elsewhere in the future.
 */
#ifdef HAVE_UTIL_H
#include <util.h>
#endif

#ifndef __dead
#define __dead __attribute__((__noreturn__))
#endif

/*
 * The following time-related macros from sys/time.h are subject to:
 * 
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *	@(#)time.h	8.2 (Berkeley) 7/10/94
 */

#ifndef HAVE_TIMESPECSUB
#define	timespecsub(tsp, usp, vsp)					\
	do {								\
		(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;		\
		(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;	\
		if ((vsp)->tv_nsec < 0) {				\
			(vsp)->tv_sec--;				\
			(vsp)->tv_nsec += 1000000000L;			\
		}							\
	} while (0)
#endif

#ifndef HAVE_TIMERCMP
#define	timercmp(tvp, uvp, cmp)						\
	(((tvp)->tv_sec == (uvp)->tv_sec) ?				\
	    ((tvp)->tv_usec cmp (uvp)->tv_usec) :			\
	    ((tvp)->tv_sec cmp (uvp)->tv_sec))
#endif

#ifndef HAVE_TIMEVAL_TO_TIMESPEC
#define	TIMEVAL_TO_TIMESPEC(tv, ts) do {				\
	(ts)->tv_sec = (tv)->tv_sec;					\
	(ts)->tv_nsec = (tv)->tv_usec * 1000;				\
} while (0)
#define	TIMESPEC_TO_TIMEVAL(tv, ts) do {				\
	(tv)->tv_sec = (ts)->tv_sec;					\
	(tv)->tv_usec = (ts)->tv_nsec / 1000;				\
} while (0)
#endif

#endif /* COMPAT_H */