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>

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

#ifndef INFTIM
#define INFTIM -1
#endif

#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

#if HAVE_EVENT2
# include <event2/event.h>
# include <event2/event_compat.h>
# include <event2/event_struct.h>
# include <event2/buffer.h>
# include <event2/buffer_compat.h>
# include <event2/bufferevent.h>
# include <event2/bufferevent_struct.h>
# include <event2/bufferevent_compat.h>
#else
# include <event.h>
#endif

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

#ifdef HAVE_SYS_TREE_H
# include <sys/tree.h>
#else
# include "compat/tree.h"
#endif

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

#ifndef HAVE_ARC4RANDOM
# include <stdint.h>
uint32_t	 arc4random(void);
void		 arc4random_buf(void *, size_t);
uint32_t	 arc4random_uniform(uint32_t);
#endif

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

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

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

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

#ifndef HAVE_GETDTABLECOUNT
int		 getdtablecount(void);
#endif

#ifndef HAVE_GETDTABLESIZE
int		 getdtablesize(void);
#endif

#ifndef HAVE_GETPROGNAME
const char	*getprogname(void);
#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_SETPROCTITLE
void		 setproctitle(const char *, ...);
#endif

#ifndef HAVE_SETPROGNAME
void		 setprogname(const char *);
#endif

#if !defined(HAVE_SETRESGID) || !defined(HAVE_SETRESUID)
# include <unistd.h>
#endif

#ifndef HAVE_SETRESGID
int		 setresgid(gid_t, gid_t, gid_t);
#endif

#ifndef HAVE_SETRESUID
int		 setresuid(gid_t, gid_t, gid_t);
#endif

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

#ifndef HAVE_STRLCPY
size_t		 strlcpy(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

#ifdef HAVE_VIS
# include <vis.h>
#else
# include "compat/vis.h"
#endif

#endif	/* COMPAT_H */