/*
 * Copyright (c) 1998 Michael Smith.
 * All rights reserved.
 * Copyright 2024 MNX Cloud, Inc.
 *
 * 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.
 *
 * $FreeBSD$
 * From	$NetBSD: stand.h,v 1.22 1997/06/26 19:17:40 drochner Exp $
 */

/*
 * Copyright (c) 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.
 * 4. 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.
 *
 *	@(#)stand.h	8.1 (Berkeley) 6/11/93
 */

#ifndef	STAND_H
#define	STAND_H

#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/stat.h>
#include <sys/dirent.h>
#include <sys/queue.h>

/* this header intentionally exports NULL from <string.h> */
#include <string.h>

#define	CHK(fmt, args...)	\
	printf("%s(%d): " fmt "\n", __func__, __LINE__, ##args)
#define	PCHK(fmt, args...)	{\
	printf("%s(%d): " fmt "\n", __func__, __LINE__, ##args); getchar();\
}

/* Avoid unwanted userlandish components */
#define	_KERNEL
#include <sys/errno.h>
#undef _KERNEL

/* special stand error codes */
#define	EADAPT	(ELAST+1)	/* bad adaptor */
#define	ECTLR	(ELAST+2)	/* bad controller */
#define	EUNIT	(ELAST+3)	/* bad unit */
#define	ESLICE	(ELAST+4)	/* bad slice */
#define	EPART	(ELAST+5)	/* bad partition */
#define	ERDLAB	(ELAST+6)	/* can't read disk label */
#define	EUNLAB	(ELAST+7)	/* unlabeled disk */
#define	EOFFSET	(ELAST+8)	/* relative seek not supported */
#define	ESALAST	(ELAST+8)	/* */

struct open_file;

/*
 * This structure is used to define file system operations in a file system
 * independent way.
 *
 * XXX note that filesystem providers should export a pointer to their fs_ops
 *     struct, so that consumers can reference this and thus include the
 *     filesystems that they require.
 */
struct fs_ops {
	const char *fs_name;
	int (*fo_open)(const char *path, struct open_file *f);
	int (*fo_close)(struct open_file *f);
	int (*fo_read)(struct open_file *f, void *buf,
	    size_t size, size_t *resid);
	int (*fo_write)(struct open_file *f, const void *buf,
	    size_t size, size_t *resid);
	off_t (*fo_seek)(struct open_file *f, off_t offset, int where);
	int (*fo_stat)(struct open_file *f, struct stat *sb);
	int (*fo_readdir)(struct open_file *f, struct dirent *d);
};

/*
 * libsa-supplied filesystems
 */
extern struct fs_ops ufs_fsops;
extern struct fs_ops tftp_fsops;
extern struct fs_ops nfs_fsops;
extern struct fs_ops cd9660_fsops;
extern struct fs_ops gzipfs_fsops;
extern struct fs_ops dosfs_fsops;

/* where values for lseek(2) */
#define	SEEK_SET	0	/* set file offset to offset */
#define	SEEK_CUR	1	/* set file offset to current plus offset */
#define	SEEK_END	2	/* set file offset to EOF plus offset */

/*
 * Device switch
 */
struct devsw {
	const char dv_name[8];
	int dv_type;		/* opaque type constant, arch-dependant */
#define	DEVT_NONE	0
#define	DEVT_DISK	1
#define	DEVT_NET	2
#define	DEVT_CD		3
#define	DEVT_ZFS	4
#define	DEVT_FD		5
	int (*dv_init)(void);	/* early probe call */
	int (*dv_strategy)(void *devdata, int rw, daddr_t blk,
			size_t size, char *buf, size_t *rsize);
	int (*dv_open)(struct open_file *f, ...);
	int (*dv_close)(struct open_file *f);
	int (*dv_ioctl)(struct open_file *f, ulong_t cmd, void *data);
	int (*dv_print)(int verbose);	/* print device information */
	void (*dv_cleanup)(void);
};

/*
 * libstand-supplied device switch
 */
extern struct devsw netdev;

extern int errno;

/*
 * Generic device specifier; architecture-dependent
 * versions may be larger, but should be allowed to
 * overlap.
 */
struct devdesc {
	struct devsw	*d_dev;
	int		d_unit;
	void		*d_opendata;
};

struct open_file {
	int		f_flags;	/* see F_* below */
	struct devsw	*f_dev;		/* pointer to device operations */
	void		*f_devdata;	/* device specific data */
	struct fs_ops	*f_ops;		/* pointer to file system operations */
	void		*f_fsdata;	/* file system specific data */
	off_t		f_offset;	/* current file offset */
	char		*f_rabuf;	/* readahead buffer pointer */
	size_t		f_ralen;	/* valid data in readahead buffer */
	off_t		f_raoffset; /* consumer offset in readahead buffer */
	int		f_id;		/* file number */
	TAILQ_ENTRY(open_file) f_link;	/* next entry */
#define	SOPEN_RASIZE	512
};

typedef TAILQ_HEAD(file_list, open_file) file_list_t;
extern file_list_t files;
extern struct open_file *fd2open_file(int);

/* f_flags values */
#define	F_READ		0x0001	/* file opened for reading */
#define	F_WRITE		0x0002	/* file opened for writing */
#define	F_RAW		0x0004	/* raw device open - no file system */
#define	F_NODEV		0x0008	/* network open - no device */
#define	F_GZIP		0x0010  /* file is compressed by gzip */
#define	F_MASK		0xFFFF
/* Mode modifier for strategy() */
#define	F_NORA		(0x01 << 16)	/* Disable Read-Ahead */

#define	isascii(c)	(((c) & ~0x7F) == 0)

static __inline int isupper(int c)
{
	return (c >= 'A' && c <= 'Z');
}

static __inline int islower(int c)
{
	return (c >= 'a' && c <= 'z');
}

static __inline int isspace(int c)
{
	return (c == ' ' || (c >= 0x9 && c <= 0xd));
}

static __inline int isdigit(int c)
{
	return (c >= '0' && c <= '9');
}

static __inline int isxdigit(int c)
{
	return (isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'));
}

static __inline int isalpha(int c)
{
	return (isupper(c) || islower(c));
}

static __inline int isalnum(int c)
{
	return (isalpha(c) || isdigit(c));
}

static __inline int iscntrl(int c)
{
	return ((c >= 0 && c < ' ') || c == 127);
}

static __inline int isgraph(int c)
{
	return (c >= '!' && c <= '~');
}

static __inline int ispunct(int c)
{
	return ((c >= '!' && c <= '/') || (c >= ':' && c <= '@') ||
	    (c >= '[' && c <= '`') || (c >= '{' && c <= '~'));
}

static __inline int toupper(int c)
{
	return (islower(c) ? c - 'a' + 'A' : c);
}

static __inline int tolower(int c)
{
	return (isupper(c) ? c - 'A' + 'a' : c);
}

/* sbrk emulation */
extern void	setheap(void *base, void *top);
/*
 * Hammerhead: match GCC 14's builtin sbrk signature (void *sbrk(intptr_t)) and
 * illumos upstream; the old K&R-style `char *sbrk(int)` triggers
 * -Werror=builtin-declaration-mismatch even under -fno-builtin.
 */
extern void	*sbrk(intptr_t incr);

extern void	mallocstats(void);

const char *x86_hypervisor(void);

extern int	printf(const char *fmt, ...) __printflike(1, 2);
extern void	vprintf(const char *fmt, __va_list);
extern int	asprintf(char **buf, const char *cfmt, ...) __printflike(2, 3);
extern int	sprintf(char *buf, const char *cfmt, ...) __printflike(2, 3);
extern int	snprintf(char *buf, size_t size, const char *cfmt, ...) \
		__printflike(3, 4);
extern void	vsprintf(char *buf, const char *cfmt, __va_list);
extern void	vsnprintf(char *buf, size_t size, const char *cfmt, __va_list);

extern void	twiddle(uint_t callerdiv);
extern void	twiddle_divisor(uint_t globaldiv);

extern void	ngets(char *, int);
#define	gets(x)	ngets((x), 0)
extern int	fgetstr(char *buf, int size, int fd);

extern int	open(const char *, int);
#define	O_RDONLY	0x0
#define	O_WRONLY	0x1
#define	O_RDWR		0x2
extern int	close(int);
extern void	closeall(void);
extern ssize_t	read(int, void *, size_t);
extern ssize_t	write(int, const void *, size_t);
extern struct	dirent *readdirfd(int);

extern void	srandom(ulong_t seed);
extern ulong_t	random(void);

extern char	*optarg;		/* getopt(3) external variables */
extern int	optind, opterr, optopt, optreset;
extern int	getopt(int, char * const [], const char *);

/* pager.c */
extern void	pager_open(void);
extern void	pager_close(void);
extern int	pager_output(const char *lines);
extern int	pager_file(const char *fname);

/* No signal state to preserve */
#define	setjmp	_setjmp
#define	longjmp	_longjmp

/* environment.c */
/* value was dynamically allocated, free if changed/unset */
#define	EV_DYNAMIC	(1<<0)
/* value is volatile, make a copy of it */
#define	EV_VOLATILE	(1<<1)
/* don't call hook when setting */
#define	EV_NOHOOK	(1<<2)

struct env_var;
typedef char	*(ev_format_t)(struct env_var *ev);
typedef int	(ev_sethook_t)(struct env_var *ev, int flags,
		    const void *value);
typedef int	(ev_unsethook_t)(struct env_var *ev);

struct env_var
{
    char		*ev_name;
    int			ev_flags;
    void		*ev_value;
    ev_sethook_t	*ev_sethook;
    ev_unsethook_t	*ev_unsethook;
    struct env_var	*ev_next, *ev_prev;
};
extern struct env_var	*environ;

extern struct env_var	*env_getenv(const char *name);
extern int		env_setenv(const char *name, int flags,
				const void *value, ev_sethook_t sethook,
				ev_unsethook_t unsethook);
extern void		env_discard(struct env_var *);
extern char		*getenv(const char *name);
extern int		setenv(const char *name, const char *value,
				int overwrite);
extern int		putenv(const char *string);
extern int		unsetenv(const char *name);

extern ev_sethook_t	env_noset;		/* refuse set operation */
extern ev_unsethook_t	env_nounset;		/* refuse unset operation */

/* stdlib.h routines */
extern long strtol(const char *__restrict, char **__restrict, int);
extern long long strtoll(const char *__restrict, char **__restrict, int);
extern unsigned long strtoul(const char *__restrict, char **__restrict, int);
extern unsigned long long strtoull(const char *__restrict, char **__restrict,
    int);

/* BCD conversions (undocumented) */
extern uchar_t const	bcd2bin_data[];
extern uchar_t const	bin2bcd_data[];
extern char const	hex2ascii_data[];

#define	bcd2bin(bcd)	(bcd2bin_data[bcd])
#define	bin2bcd(bin)	(bin2bcd_data[bin])
#define	hex2ascii(hex)	(hex2ascii_data[hex])

/* min/max (undocumented) */
static __inline int imax(int a, int b) { return (a > b ? a : b); }
static __inline int imin(int a, int b) { return (a < b ? a : b); }
static __inline long lmax(long a, long b) { return (a > b ? a : b); }
static __inline long lmin(long a, long b) { return (a < b ? a : b); }
static __inline uint_t max(uint_t a, uint_t b) { return (a > b ? a : b); }
static __inline uint_t min(uint_t a, uint_t b) { return (a < b ? a : b); }
static __inline quad_t qmax(quad_t a, quad_t b) { return (a > b ? a : b); }
static __inline quad_t qmin(quad_t a, quad_t b) { return (a < b ? a : b); }
static __inline ulong_t ulmax(ulong_t a, ulong_t b) { return (a > b ? a : b); }
static __inline ulong_t ulmin(ulong_t a, ulong_t b) { return (a < b ? a : b); }

/* null functions for device/filesystem switches (undocumented) */
extern int	nodev(void);
extern int	noioctl(struct open_file *, ulong_t, void *);
extern void	nullsys(void);

extern int	null_open(const char *, struct open_file *);
extern int	null_close(struct open_file *);
extern int	null_read(struct open_file *, void *, size_t, size_t *);
extern int	null_write(struct open_file *, const void *, size_t, size_t *);
extern off_t	null_seek(struct open_file *, off_t, int);
extern int	null_stat(struct open_file *, struct stat *);
extern int	null_readdir(struct open_file *, struct dirent *);


/*
 * Machine dependent functions and data, must be provided or stubbed by
 * the consumer
 */
extern void	exit(int) __dead2;
extern int	getchar(void);
extern int	ischar(void);
extern void	putchar(int);
extern int	devopen(struct open_file *, const char *, const char **);
extern int	devclose(struct open_file *f);
extern void	panic(const char *, ...) __dead2 __printflike(1, 2);
extern void	panic_action(void) __weak_symbol __dead2;
extern time_t	getsecs(void);
extern struct fs_ops	*file_system[];
extern struct fs_ops	*exclusive_file_system;
extern struct devsw	*devsw[];

/*
 * Expose byteorder(3) functions.
 */
#ifndef _BYTEORDER_PROTOTYPED
#define	_BYTEORDER_PROTOTYPED
extern uint32_t		htonl(uint32_t);
extern uint16_t		htons(uint16_t);
extern uint32_t		ntohl(uint32_t);
extern uint16_t		ntohs(uint16_t);
#endif

#ifndef _BYTEORDER_FUNC_DEFINED
#define	_BYTEORDER_FUNC_DEFINED
#define	htonl(x)	__htonl(x)
#define	htons(x)	__htons(x)
#define	ntohl(x)	__ntohl(x)
#define	ntohs(x)	__ntohs(x)
#endif

void *Malloc(size_t, const char *, int);
void *Memalign(size_t, size_t, const char *, int);
void *Calloc(size_t, size_t, const char *, int);
void *Realloc(void *, size_t, const char *, int);
void *Reallocf(void *, size_t, const char *, int);
void Free(void *, const char *, int);

#if DEBUG_MALLOC
#define	malloc(x)	Malloc(x, __FILE__, __LINE__)
#define	memalign(x, y)	Memalign(x, y, __FILE__, __LINE__)
#define	calloc(x, y)	Calloc(x, y, __FILE__, __LINE__)
#define	free(x)		Free(x, __FILE__, __LINE__)
#define	realloc(x, y)	Realloc(x, y, __FILE__, __LINE__)
#define	reallocf(x, y)	Reallocf(x, y, __FILE__, __LINE__)
#else
#define	malloc(x)	Malloc(x, NULL, 0)
#define	memalign(x, y)	Memalign(x, y, NULL, 0)
#define	calloc(x, y)	Calloc(x, y, NULL, 0)
#define	free(x)		Free(x, NULL, 0)
#define	realloc(x, y)	Realloc(x, y, NULL, 0)
#define	reallocf(x, y)	Reallocf(x, y, NULL, 0)
#endif

/*
 * va <-> pa routines. MD code must supply.
 */
caddr_t ptov(uintptr_t);

#endif	/* STAND_H */