/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2012 AT&T Intellectual Property          *
*          Copyright (c) 2020-2022 Contributors to ksh 93u+m           *
*                      and is licensed under the                       *
*                 Eclipse Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*          http://www.eclipse.org/org/documents/epl-v10.html           *
*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
/*
 * Glenn Fowler
 * AT&T Research
 *
 * command line option parser and usage formatter
 * its a monster but its all in one place
 * widen your window while you're at it
 */

#include <optlib.h>
#include <debug.h>
#include <ccode.h>
#include <ctype.h>
#include <errno.h>

#define KEEP		"*[A-Za-z][A-Za-z]*"
#define OMIT		"*@(\\[[-+]*\\?*\\]|\\@\\(#\\)|Copyright \\(c\\)|\\$\\I\\d\\: )*"

#define GO		'{'		/* group nest open		*/
#define OG		'}'		/* group nest close		*/

#define OPT_WIDTH	80		/* default help text width	*/
#define OPT_MARGIN	10		/* default help text margin	*/
#define OPT_USAGE	7		/* usage continuation indent	*/

#define OPT_flag	0x001		/* flag ( 0 or 1 )		*/
#define OPT_hidden	0x002		/* remaining are hidden		*/
#define OPT_ignorecase	0x004		/* arg match ignores case	*/
#define OPT_invert	0x008		/* flag inverts long sense	*/
#define OPT_listof	0x010		/* arg is ' ' or ',' list	*/
#define OPT_number	0x020		/* arg is strtonll() number	*/
#define OPT_oneof	0x040		/* arg may be set once		*/
#define OPT_optional	0x080		/* arg is optional		*/
#define OPT_string	0x100		/* arg is string		*/

#define OPT_preformat	0001		/* output preformat string	*/
#define OPT_proprietary	0002		/* proprietary docs		*/

#define OPT_TYPE	(OPT_flag|OPT_number|OPT_string)

#define STYLE_posix	0		/* POSIX getopt usage		*/
#define STYLE_short	1		/* [default] short usage	*/
#define STYLE_long	2		/* long usage			*/
#define STYLE_match	3		/* long description of matches	*/
#define STYLE_options	4		/* short and long descriptions	*/
#define STYLE_man	5		/* pretty details		*/
#define STYLE_html	6		/* html details			*/
#define STYLE_nroff	7		/* nroff details		*/
#define STYLE_api	8		/* program details		*/
#define STYLE_keys	9		/* translation key strings	*/
#define STYLE_usage	10		/* escaped usage string		*/

#define FONT_BOLD	1
#define FONT_ITALIC	2
#define FONT_LITERAL	4

#define HELP_head	0x01
#define HELP_index	0x02

#define TAG_NONE	0
#define TAG_DIV		1
#define TAG_DL		2

#define SEP(c)		((c)=='-'||(c)=='_')

typedef struct Attr_s
{
	const char*	name;
	int		flag;
} Attr_t;

typedef struct Help_s
{
	const char*	match;		/* builtin help match name	*/
	const char*	name;		/* builtin help name		*/
	int		style;		/* STYLE_*			*/
	const char*	text;		/* --? text			*/
	unsigned int	size;		/* strlen text			*/
} Help_t;

typedef struct Font_s
{
	const char*	html[2];
	const char*	nroff[2];
	const char*	term[2];
} Font_t;

typedef struct List_s
{
	int		type;		/* { - + : }			*/
	const char*	name;		/* list name			*/
	const char*	text;		/* help text			*/
} List_t;

typedef struct Msg_s
{
	const char*	text;		/* default message text		*/
	Dtlink_t	link;		/* cdt link			*/
} Msg_t;

typedef struct Save_s
{
	Dtlink_t	link;		/* cdt link			*/
	char		text[1];	/* saved text text		*/
} Save_t;

typedef struct Push_s
{
	struct Push_s*	next;		/* next string			*/
	char*		ob;		/* next char in old string	*/
	char*		oe;		/* end of old string		*/
	char*		nb;		/* next char in new string	*/
	char*		ne;		/* end of new string		*/
	int		ch;		/* localize() translation	*/
} Push_t;

typedef struct Tag_s
{
	unsigned char	level;		/* indent level			*/
	unsigned char	id;		/* TAG_* ID			*/
} Tag_t;

typedef struct Indent_s
{
	int		stop;		/* tab column position		*/
} Indent_t;

static Indent_t		indent[] =
{
	0,2,	4,10,	12,18,	20,26,	28,34,	36,42,	44,50,	0,0
};

static const char*	end[] =
{
	"", "</DIV>\n", "</DL>\n"
};

static const char	term_off[] =	{CC_esc,'[','0','m',0};
static const char	term_B_on[] =	{CC_esc,'[','1','m',0};
static const char	term_I_on[] =	{CC_esc,'[','1',';','4','m',0};

static const Font_t	fonts[] =
{
	"",	"",	"",	"",	"",			"",
	"</B>",	"<B>", "\\fP",	"\\fB",	&term_off[0],	&term_B_on[0],
	"</I>",	"<I>", "\\fP",	"\\fI",	&term_off[0],	&term_I_on[0],
	"",	"",	"",	"",	"",			"",
	"</TT>","<TT>","\\fP",	"\\f5",	"",			"",
};

static char		native[] = "";

static unsigned char	map[UCHAR_MAX];

static Optstate_t	state;

#if 0 /* #if !_PACKAGE_astsa  // this somehow corrupts "Or:" usage messages, e.g. in 'typeset -\?' */

#define ID		ast.id

#define C(s)		ERROR_catalog(s)
#define D(s)		(state.msgdict && dtmatch(state.msgdict, (s)))
#define T(i,c,m)	(X(c)?translate(i,c,C(m)):(m))
#define X(c)		(ERROR_translating()&&(c)!=native)
#define Z(x)		C(x),sizeof(x)-1

/*
 * translate with C_LC_MESSAGES_libast[] check
 */

static char*
translate(const char* cmd, const char* cat, const char* msg)
{
	if (!X(cat))
		return (char*)msg;
	if (cat != (const char*)ID && D(msg))
		cat = (const char*)ID;
	return errorx(NiL, cmd, cat, msg);
}

#else

static char		ID[] = "ast";

#define C(s)		s
#define D(s)		(state.msgdict && dtmatch(state.msgdict, (s)))
#define T(i,c,m)	m
#define X(c)		0
#define Z(x)		C(x),sizeof(x)-1

#endif

static const List_t	help_head[] =
{
	'-',	0,
		0,
	'+',	C("NAME"),
		C("options available to all \bAST\b commands"),
	'+',	C("DESCRIPTION"),
		C("\b-?\b and \b--?\b* options are the same \
for all \bAST\b commands. For any \aitem\a below, if \b--\b\aitem\a is not \
supported by a given command then it is equivalent to \b--\?\?\b\aitem\a. The \
\b--\?\?\b form should be used for portability. All output is written to the \
standard error."),
};

static const Help_t	styles[] =
{
	C("about"),	"-",		STYLE_match,
	Z("Show all implementation info."),
	C("api"),	"?api",		STYLE_api,
	Z("Output detailed info in program readable form."),
	C("help"),	"",		-1,
	Z("Show detailed help option info."),
	C("html"),	"?html",	STYLE_html,
	Z("Output detailed info in HTML."),
	C("keys"),	"?keys",	STYLE_keys,
	Z("Output usage key strings for translation."),
	C("long"),	"?long",	STYLE_long,
	Z("Show brief usage with long options."),
	C("man"),	"?man",		STYLE_man,
	Z("Show detailed info as a manual page."),
	C("nroff"),	"?nroff",	STYLE_nroff,
	Z("Output detailed info in nroff format."),
	C("options"),	"?options",	STYLE_options,
	Z("List short and long option details."),
	C("posix"),	"?posix",	STYLE_posix,
	Z("Output POSIX-compliant getopt(3) short options string."),
	C("short"),	"?short",	STYLE_short,
	Z("Show brief usage with short options."),
	C("usage"),	"?usage",	STYLE_usage,
	Z("Output the full AST optget(3) usage string."),
};

static const List_t	help_tail[] =
{
	':',	C("\?\?-\alabel\a"),
		C("List implementation info matching \alabel\a*."),
	':',	C("\?\?\aname\a"),
		C("Equivalent to \b--help=\b\aname\a."),
	':',	C("\?\?"),
		C("Equivalent to \b--\?\?options\b."),
	':',	C("\?\?\?\?"),
		C("Equivalent to \b--\?\?man\b."),
	':',	C("\?\?\?\?\?\?"),
		C("Equivalent to \b--\?\?help\b."),
	':',	C("\?\?\?\?\?\?\aitem\a"),
		C("If the next argument is \b--\b\aoption\a then list \
the \aoption\a output in the \aitem\a style. Otherwise print \
\bversion=\b\an\a where \an\a>0 if \b--\?\?\b\aitem\a is supported, \b0\b \
if not."),
	':',	C("\?\?\?\?\?\?ESC"),
		C("Emit escape codes even if output is not a terminal."),
	':',	C("\?\?\?\?\?\?MAN[=\asection\a]]"),
		C("List the \bman\b(1) section title for \asection\a [the \
current command]]."),
	':',	C("\?\?\?\?\?\?SECTION"),
		C("List the \bman\b(1) section number for the current command."),
	':',	C("\?\?\?\?\?\?TEST"),
		C("Massage the output for regression testing."),
};

static const Attr_t	attrs[] =
{
	"flag",		OPT_flag,
	"hidden",	OPT_hidden,
	"ignorecase",	OPT_ignorecase,
	"invert",	OPT_invert,
	"listof",	OPT_listof,
	"number",	OPT_number,
	"oneof",	OPT_oneof,
	"optional",	OPT_optional,
	"string",	OPT_string,
};

static const char	unknown[] = C("unknown option or attribute");

/*
 * list of common man page strings
 * NOTE: add but do not delete from this table
 */

static Msg_t		C_LC_MESSAGES_libast[] =
{
	{ C("APPLICATION USAGE") },
	{ C("ASYNCHRONOUS EVENTS") },
	{ C("BUGS") },
	{ C("CAVEATS") },
	{ C("CONSEQUENCES OF ERRORS") },
	{ C("DESCRIPTION") },
	{ C("ENVIRONMENT VARIABLES") },
	{ C("EXAMPLES") },
	{ C("EXIT STATUS") },
	{ C("EXTENDED DESCRIPTION") },
	{ C("INPUT FILES") },
	{ C("LIBRARY") },
	{ C("NAME") },
	{ C("OPERANDS") },
	{ C("OPTIONS") },
	{ C("OUTPUT FILES") },
	{ C("PLUGIN") },
	{ C("SEE ALSO") },
	{ C("STDERR") },
	{ C("STDIN") },
	{ C("STDOUT") },
	{ C("SYNOPSIS") },
	{ C("author") },
	{ C("copyright") },
	{ C("license") },
	{ C("name") },
	{ C("path") },
	{ C("version") },
};

/*
 * 2007-03-19 move opt_info from _opt_info_ to (*_opt_data_)
 *	      to allow future Opt_t growth
 *            by 2009 _opt_info_ can be static
 */

#if _BLD_ast && defined(__EXPORT__)
#define extern		extern __EXPORT__
#endif

extern Opt_t	_opt_info_;

Opt_t		_opt_info_ = { 0,0,0,0,0,0,0,{0},{0},0,0,0,{0},{0},&state };

#undef	extern

__EXTERN__(Opt_t, _opt_info_);

__EXTERN__(Opt_t*, _opt_infop_);

Opt_t*		_opt_infop_ = &_opt_info_;

Optstate_t*
optstate(Opt_t* p)
{
	return &state;
}

#if DEBUG || _BLD_DEBUG

/*
 * debug usage string segment format
 */

static char*
show(register char* s)
{
	register int	c;
	register char*	t;
	register char*	e;

	static char	buf[32];

	if (!s)
		return "(null)";
	t = buf;
	e = buf + sizeof(buf) - 2;
	while (t < e)
	{
		switch (c = *s++)
		{
		case 0:
			goto done;
		case '\a':
			*t++ = '\\';
			c = 'a';
			break;
		case '\b':
			*t++ = '\\';
			c = 'b';
			break;
		case '\f':
			*t++ = '\\';
			c = 'f';
			break;
		case '\n':
			*t++ = '\\';
			c = 'n';
			break;
		case '\t':
			*t++ = '\\';
			c = 't';
			break;
		case '\v':
			*t++ = '\\';
			c = 'v';
			break;
		}
		*t++ = c;
	}
 done:
	*t = 0;
	return buf;
}

#endif

typedef struct Section_s
{
	const char	section[4];
	const char*	name;
} Section_t;

static const Section_t	sections[] =
{
	"1M",	"MAKE ASSERTION OPERATORS AND RULES",
	"1",	"USER COMMANDS",
	"2",	"SYSTEM CALLS",
	"3F",	"FORTRAN LIBRARY ROUTINES",
	"3K",	"KERNEL VM LIBRARY FUNCTIONS",
	"3L",	"LIGHTWEIGHT PROCESSES LIBRARY",
	"3M",	"MATHEMATICAL LIBRARY",
	"3N",	"NETWORK FUNCTIONS",
	"3R",	"RPC SERVICES LIBRARY",
	"3S",	"STANDARD I/O FUNCTIONS",
	"3V",	"SYSTEM V LIBRARY",
	"3",	"C LIBRARY FUNCTIONS",
	"4F",	"PROTOCOL FAMILIES",
	"4P",	"PROTOCOLS",
	"4",	"DEVICES AND NETWORK INTERFACES",
	"5P",	"PLUGINS",
	"5",	"FILE FORMATS",
	"6",	"GAMES AND DEMOS",
	"7",	"PUBLIC FILES AND TABLES",
	"8",	"ADMINISTRATIVE COMMANDS",
	"L",	"LOCAL COMMANDS",
};

/*
 * return section name given abbreviation
 */

static char*
secname(char* section)
{
	int		i;
	char*		b;
	char*		t;
	const char*	s;

	b = t = fmtbuf(64);
	if (section[1])
	{
		switch (section[2] ? section[2] : section[1])
		{
		case 'C':
			s = "COMPATIBILITY ";
			break;
		case 'U':
			s = "UWIN ";
			break;
		case 'X':
			s = "MISCELLANEOUS ";
			break;
		default:
			s = 0;
			break;
		}
		if (s)
			t = strcopy(t, s);
	}
	s = 0;
	for (i = 0; i < elementsof(sections); i++)
		if (section[0] == sections[i].section[0] && (section[1] == sections[i].section[1] || !sections[i].section[1]))
		{
			s = sections[i].name;
			break;
		}
	if (!s)
	{
		t = strcopy(t, "SECTION ");
		s = section;
	}
	strcopy(t, s);
	return b;
}

/*
 * pop the push stack
 */

static Push_t*
pop(register Push_t* psp)
{
	register Push_t*	tsp;

	while (tsp = psp)
	{
		psp = psp->next;
		free(tsp);
	}
	return 0;
}

/*
 * skip over line space to the next token
 */

static char*
next(register char* s, int version)
{
	register char*	b;

	while (*s == '\t' || *s == '\r' || version >= 1 && *s == ' ')
		s++;
	if (*s == '\n')
	{
		b = s;
		while (*++s == ' ' || *s == '\t' || *s == '\r');
		if (*s == '\n')
			return b;
	}
	return s;
}

/*
 * skip to t1 or t2 or t3, whichever first, in s
 *	n==0	outside [...]
 *	n==1	inside [...] before ?
 *	n==2	inside [...] after ?
 *	b==0	outside {...}
 *	b==1	inside {...}
 * past skips past the terminator to the next token
 * otherwise a pointer to the terminator is returned
 *
 * ]] for ] inside [...]
 * ?? for ? inside [...] before ?
 * :: for : inside [...] before ?
 */

static char*
skip(register char* s, register int t1, register int t2, register int t3, register int n, register int b, int past, int version)
{
	register int	c;
	register int	on = n;
	register int	ob = b;

	if (version < 1)
	{
		n = n >= 1;
		for (;;)
		{
			switch (*s++)
			{
			case 0:
				break;
			case '[':
				n++;
				continue;
			case ']':
				if (--n <= 0)
					break;
				continue;
			default:
				continue;
			}
			break;
		}
	}
	else while (c = *s++)
	{
		message((-22, "optget: skip t1=%c t2=%c t3=%c n=%d b=%d `%s'", t1 ? t1 : '@', t2 ? t2 : '@', t3 ? t3 : '@', n, b, show(s - 1)));
		if (c == '[')
		{
			if (!n)
				n = 1;
		}
		else if (c == ']')
		{
			if (n)
			{
				if (*s == ']')
					s++;
				else if (on == 1)
					break;
				else
					n = 0;
			}
		}
		else if (c == GO)
		{
			if (n == 0)
				b++;
		}
		else if (c == OG)
		{
			if (n == 0 && b-- == ob)
				break;
		}
		else if (c == '?')
		{
			if (n == 1)
			{
				if (*s == '?')
					s++;
				else
				{
					if (n == on && (c == t1 || c == t2 || c == t3))
						break;
					n = 2;
				}
			}
		}
		else if (n == on && (c == t1 || c == t2 || c == t3))
		{
			if (n == 1 && c == ':' && *s == c)
				s++;
			else
				break;
		}
	}
	return past && *(s - 1) ? next(s, version) : s - 1;
}

/*
 * *s points to '(' on input
 * return is one past matching ')'
 */

static char*
nest(register char* s)
{
	int	n;

	n = 0;
	for (;;)
	{
		switch (*s++)
		{
		case '(':
			n++;
			continue;
		case ')':
			if (!--n)
				break;
			continue;
		default:
			continue;
		}
		break;
	}
	return s;
}

/*
 * match s with t
 * t translated if possible
 * embedded { - _ ' } ignored
 * * separates required prefix from optional suffix
 * otherwise prefix match
 */

static int
match(char* s, char* t, int version, const char* id, const char* catalog)
{
	register char*	w;
	register char*	x;
	char*		xw;
	char*		ww;
	int		n;
	int		v;
	int		j;

	for (n = 0; n < 2; n++)
	{
		if (n)
			x = t;
		else
		{
			if (catalog)
			{
				w = skip(t, ':', '?', 0, 1, 0, 0, version);
				w = sfprints("%-.*s", w - t, t);
				x = T(id, catalog, w);
				if (x == w)
					continue;
			}
			x = T(NiL, ID, t);
			if (x == t)
				continue;
		}
		do
		{
			v = 0;
			xw = x;
			w = ww = s;
			while (*x && *w)
			{
				if (isupper(*x))
					xw = x;
				if (isupper(*w))
					ww = w;
				if (*x == '*' && !v++ || *x == '\a')
				{
					if (*x == '\a')
						do
						{
							if (!*++x)
							{
								x--;
								break;
							}
						} while (*x != '\a');
					j = *(x + 1);
					if (j == ':' || j == '|' || j == '?' || j == ']' || j == 0)
						while (*w)
							w++;
				}
				else if (SEP(*x))
					xw = ++x;
				else if (SEP(*w) && w != s)
					ww = ++w;
				else if (*x == *w)
				{
					x++;
					w++;
				}
				else if (w == ww && x == xw)
					break;
				else
				{
					if (x != xw)
					{
						while (*x && !SEP(*x) && !isupper(*x))
							x++;
						if (!*x)
							break;
						if (SEP(*x))
							x++;
						xw = x;
					}
					while (w > ww && *w != *x)
						w--;
				}
			}
			if (!*w)
			{
				if (!v)
				{
					for (;;)
					{
						switch (*x++)
						{
						case 0:
						case ':':
						case '|':
						case '?':
						case ']':
							return 1;
						case '*':
							break;
						default:
							continue;
						}
						break;
					}
					break;
				}
				return 1;
			}
		} while (*(x = skip(x, '|', 0, 0, 1, 0, 0, version)) == '|' && x++);
	}
	return 0;
}

/*
 * prefix search for s in tab with num elements of size
 * with optional translation
 */

static void*
search(const void* tab, size_t num, size_t siz, char* s)
{
	register char*	p;
	register char*	e;

	for (e = (p = (char*)tab) + num * siz; p < e; p += siz)
		if (match(s, *((char**)p), -1, NiL, NiL))
			return (void*)p;
	return 0;
}

/*
 * save ap+bp+cp and return the saved pointer
 */

static char*
save(const char* ap, size_t az, const char* bp, size_t bz, const char* cp, size_t cz)
{
	char*		b;
	char*		e;
	const char*	ep;
	Save_t*		p;
	Dtdisc_t*	d;
	char		buf[1024];

	static Dt_t*	dict;

	if (!dict)
	{
		if (!(d = newof(0, Dtdisc_t, 1, 0)))
			return (char*)ap;
		d->key = offsetof(Save_t, text);
		if (!(dict = dtopen(d, Dtset)))
			return (char*)ap;
	}
	b = buf;
	e = b + sizeof(buf) - 1;
	for (ep = ap + az; b < e && ap < ep; *b++ = *ap++);
	if (bp)
	{
		for (ep = bp + bz; b < e && bp < ep; *b++ = *bp++);
		if (cp)
			for (ep = cp + cz; b < e && cp < ep; *b++ = *cp++);
	}
	*b = 0;
	if (!(p = (Save_t*)dtmatch(dict, buf)))
	{
		if (!(p = newof(0, Save_t, 1, b - buf)))
			return (char*)ap;
		strcpy(p->text, buf);
		dtinsert(dict, p);
	}
	return p->text;
}

/*
 * expand \f...\f info
 * *p set to next char after second \f
 * expanded value returned
 */

static char*
expand(register char* s, register char* e, char** p, Sfio_t* ip, char* id)
{
	register int	c;
	register char*	b = s;
	int		n;

	n = sfstrtell(ip);
	c = 1;
	while ((!e || s < e) && (c = *s++) && c != '\f');
	sfwrite(ip, b, s - b - 1);
	sfputc(ip, 0);
	b = sfstrbase(ip) + n;
	n = sfstrtell(ip);
	if (!c)
		s--;
	if (*b == '?')
	{
		if (!*++b || streq(b, "NAME"))
		{
			if (!(b = id))
				b = "command";
			sfstrseek(ip, 0, SEEK_SET);
			sfputr(ip, b, -1);
			n = 0;
		}
		else
			n = 1;
	}
	else if (!opt_info.disc || !opt_info.disc->infof || (*opt_info.disc->infof)(&opt_info, ip, b, opt_info.disc) < 0)
		n = 0;
	*p = s;
	if (s = sfstruse(ip))
		s += n;
	else
		s = "error";
	return s;
}

/*
 * initialize the translation dictionary and flag maps
 */

static void
initdict(void)
{
	register int	n;

	state.vp = sfstropen();
	state.msgdisc.key = offsetof(Msg_t, text);
	state.msgdisc.size = -1;
	state.msgdisc.link = offsetof(Msg_t, link);
	if (state.msgdict = dtopen(&state.msgdisc, Dtset))
		for (n = 0; n < elementsof(C_LC_MESSAGES_libast); n++)
			dtinsert(state.msgdict, C_LC_MESSAGES_libast + n);
}

/*
 * initialize the attributes for pass p from opt string s
 */

static int
init(register char* s, Optpass_t* p)
{
	register char*	t;
	register char*	u;
	register int	c;
	register int	a;
	register int	n;
	char*		e;
	int		l;

	if (!state.localized)
	{
		state.localized = 1;
#if !_PACKAGE_astsa
		if (!ast.locale.serial)
			setlocale(LC_ALL, "");
#endif
		state.xp = sfstropen();
		if (!map[OPT_FLAGS[0]])
			for (n = 0, t = OPT_FLAGS; *t; t++)
				map[*t] = ++n;
	}
#if _BLD_DEBUG
	error(-2, "optget debug");
#endif
	p->oopts = s;
	p->version = 0;
	p->prefix = 2;
	p->section[0] = '1';
	p->section[1] = 0;
	p->flags = 0;
	p->id = error_info.id;
	p->catalog = 0;
	s = next(s, 0);
	if (*s == ':')
		s++;
	if (*s == '+')
		s++;
	s = next(s, 0);
	if (*s++ == '[')
	{
		if (*s == '+')
			p->version = 1;
		else if (*s++ == '-')
		{
			if (*s == '?' || *s == ']')
				p->version = 1;
			else
			{
				if (!isdigit(*s))
					p->version = 1;
				else
					while (isdigit(*s))
						p->version = p->version * 10 + (*s++ - '0');
				while (*s && *s != ']')
				{
					if ((c = *s++) == '?')
					{
						p->release = s;
						while (*s && *s != ']')
							if (isspace(*s++))
								p->release = s;
						break;
					}
					else if (!isdigit(*s))
						n = 1;
					else
					{
						n = 0;
						while (isdigit(*s))
							n = n * 10 + (*s++ - '0');
					}
					switch (c)
					{
					case '+':
						p->flags |= OPT_plus;
						break;
					case 'a':
						p->flags |= OPT_append;
						break;
					case 'c':
						p->flags |= OPT_cache;
						break;
					case 'i':
						p->flags |= OPT_ignore;
						break;
					case 'l':
						p->flags |= OPT_long;
						break;
					case 'm':
						p->flags |= OPT_module;
						break;
					case 'n':
						p->flags |= OPT_numeric;
						break;
					case 'o':
						p->flags |= OPT_old;
						break;
					case 'p':
						p->prefix = n;
						break;
					case 's':
						if (n > 1 && n < 5)
						{
							p->flags |= OPT_functions;
							p->prefix = 0;
						}
						p->section[0] = '0' + (n % 10);
						n = 1;
						if (isupper(*s))
							p->section[n++] = *s++;
						if (isupper(*s))
							p->section[n++] = *s++;
						p->section[n] = 0;
						break;
					}
				}
			}
		}
		while (*s)
			if (*s++ == ']')
			{
				while (isspace(*s))
					s++;
				if (*s++ == '[')
				{
					if (*s++ != '-')
					{
						l = 0;
						if (strneq(s - 1, "+NAME?", 6) && (s += 5) || strneq(s - 1, "+LIBRARY?", 9) && (s += 8) && (l = 1) || strneq(s - 1, "+PLUGIN?", 8) && (s += 7) && (l = 1))
						{
							for (; *s == '\a' || *s == '\b' || *s == '\v' || *s == ' '; s++);
							if (*s == '\f')
							{
								if (*(s + 1) == '?' && *(s + 2) == '\f')
									break;
								s = expand(s + 1, NiL, &e, state.xp, p->id);
							}
							for (t = s; *t && *t != ' ' && *t != ']'; t++);
							if (t > s)
							{
								u = t;
								if (*(t - 1) == '\a' || *(t - 1) == '\b' || *(t - 1) == '\v')
									t--;
								if (t > s)
								{
									while (*u == ' ' || *u == '\\')
										u++;
									if (*u == '-' || *u == ']')
									{
										if (!l)
											p->id = save(s, t - s, 0, 0, 0, 0);
										else if ((a = strlen(p->id)) <= (n = t - s) || strncmp(p->id + a - n, s, n) || *(p->id + a - n - 1) != ':')
											p->id = save(p->id, strlen(p->id), "::", 2, s, t - s);
									}
								}
							}
						}
						break;
					}
					if (*s == '-')
						s++;
					if (strneq(s, "catalog?", 8))
						p->catalog = s += 8;
				}
			}
	}
	if (!error_info.id)
	{
		if (!(error_info.id = p->id))
			p->id = "command";
	}
	else if (p->id == error_info.id)
		p->id = save(p->id, strlen(p->id), 0, 0, 0, 0);
	if (s = p->catalog)
		p->catalog = ((t = strchr(s, ']')) && (!p->id || (t - s) != strlen(p->id) || !strneq(s, p->id, t - s))) ? save(s, t - s, 0, 0, 0, 0) : (char*)0;
	if (!p->catalog)
	{
		if (opt_info.disc && opt_info.disc->catalog && (!p->id || !streq(opt_info.disc->catalog, p->id)))
			p->catalog = opt_info.disc->catalog;
		else
			p->catalog = ID;
	}
	s = p->oopts;
	if (*s == ':')
		s++;
	if (*s == '+')
	{
		s++;
		p->flags |= OPT_plus;
	}
	s = next(s, 0);
	if (*s != '[')
	{
		for (t = s, a = 0; *t; t++)
			if (!a && *t == '-')
			{
				p->flags |= OPT_minus;
				break;
			}
			else if (*t == '[')
				a++;
			else if (*t == ']')
				a--;
	}
	if (!p->version && (t = strchr(s, '(')) && strchr(t, ')') && (state.cp || (state.cp = sfstropen())))
	{
		/*
		 * Solaris long option compatibility
		 */

		p->version = 1;
		for (t = p->oopts; t < s; t++)
			sfputc(state.cp, *t);
		n = t - p->oopts;
		sfputc(state.cp, '[');
		sfputc(state.cp, '-');
		sfputc(state.cp, ']');
		c = *s++;
		while (c)
		{
			sfputc(state.cp, '[');
			sfputc(state.cp, c);
			if (a = (c = *s++) == ':')
				c = *s++;
			if (c == '(')
			{
				sfputc(state.cp, ':');
				for (;;)
				{
					while ((c = *s++) && c != ')')
						sfputc(state.cp, c);
					if (!c || (c = *s++) != '(')
						break;
					sfputc(state.cp, '|');
				}
			}
			sfputc(state.cp, ']');
			if (a)
				sfputr(state.cp, ":[string]", -1);
		}
		if (!(p->oopts = s = sfstruse(state.cp)))
			return -1;
		s += n;
	}
	p->opts = s;
	message((-2, "version=%d prefix=%d section=%s flags=%04x id=%s catalog=%s oopts=%p", p->version, p->prefix, p->section, p->flags, p->id, p->catalog, p->oopts));
	return 0;
}

/*
 * return the bold set/unset sequence for style
 */

static const char*
font(int f, int style, int set)
{
	switch (style)
	{
	case STYLE_html:
		return fonts[f].html[set];
	case STYLE_nroff:
		return fonts[f].nroff[set];
	case STYLE_short:
	case STYLE_long:
	case STYLE_posix:
	case STYLE_api:
		break;
	default:
		if (state.emphasis > 0)
			return fonts[f].term[set];
		break;
	}
	return "";
}

/*
 * push \f...\f info
 */

static Push_t*
info(Push_t* psp, char* s, char* e, Sfio_t* ip, char* id)
{
	register char*	b;
	int		n;
	Push_t*		tsp;

	static Push_t	push;

	b = expand(s, e, &s, ip, id);
	n = strlen(b);
	if (tsp = newof(0, Push_t, 1, n + 1))
	{
		tsp->nb = (char*)(tsp + 1);
		tsp->ne = tsp->nb + n;
		strcpy(tsp->nb, b);
	}
	else
		tsp = &push;
	tsp->next = psp;
	tsp->ob = s;
	tsp->oe = e;
	return tsp;
}

/*
 * push translation
 */

static Push_t*
localize(Push_t* psp, char* s, char* e, int term, int n, Sfio_t* ip, int version, char* id, char* catalog)
{
	char*		t;
	char*		u;
	Push_t*		tsp;
	int		c;

	t = skip(s, term, 0, 0, n, 0, 0, version);
	if (e && t > e)
		t = e;
	while (s < t)
	{
		switch (c = *s++)
		{
		case ':':
		case '?':
			if (term && *s == c)
				s++;
			break;
		case ']':
			if (*s == c)
				s++;
			break;
		}
		sfputc(ip, c);
	}
	if (!(s = sfstruse(ip)) || (u = T(id, catalog, s)) == s)
		return 0;
	n = strlen(u);
	if (tsp = newof(0, Push_t, 1, n + 1))
	{
		tsp->nb = (char*)(tsp + 1);
		tsp->ne = tsp->nb + n;
		strcpy(tsp->nb, u);
		tsp->ob = t;
		tsp->oe = e;
		tsp->ch = 1;
	}
	tsp->next = psp;
	return tsp;
}

/*
 * output label s from [ ...label...[?...] ] to sp
 * 1 returned if the label was translated
 */

static int
label(register Sfio_t* sp, int sep, register char* s, int about, int z, int level, int style, int f, Sfio_t* ip, int version, char* id, char* catalog)
{
	register int	c;
	register char*	t;
	register char*	e;
	int		ostyle;
	int		a;
	int		i;
	char*		p;
	char*		q;
	char*		w;
	char*		y;
	int		va;
	Push_t*		tsp;

	int		r = 0;
	int		n = 1;
	Push_t*		psp = 0;

	if ((ostyle = style) > (STYLE_nroff - (sep <= 0)) && f != FONT_LITERAL && f >= 0)
		style = 0;
	if (z < 0)
		e = s + strlen(s);
	else
		e = s + z;
	if (sep > 0)
	{
		if (sep == ' ' && style == STYLE_nroff)
			sfputc(sp, '\\');
		sfputc(sp, sep);
	}
	sep = !sep || z < 0;
	va = 0;
	y = 0;
	if (about)
		sfputc(sp, '(');
	if (version < 1)
	{
		a = 0;
		for (;;)
		{
			if (s >= e)
				return r;
			switch (c = *s++)
			{
			case '[':
				a++;
				break;
			case ']':
				if (--a < 0)
					return r;
				break;
			}
			sfputc(sp, c);
		}
	}
	else if (level && (*(p = skip(s, 0, 0, 0, 1, level, 1, version)) == ':' || *p == '#'))
	{
		va = 0;
		if (*++p == '?' || *p == *(p - 1))
		{
			p++;
			va |= OPT_optional;
		}
		if (*(p = next(p, version)) == '[')
			y = p + 1;
	}
	if (X(catalog) && (!level || *s == '\a' || *(s - 1) != '+') &&
	    (tsp = localize(psp, s, e, (sep || level) ? '?' : 0, sep || level, ip, version, id, catalog)))
	{
		psp = tsp;
		s = psp->nb;
		e = psp->ne;
		r = psp->ch > 0;
	}
	switch (*s)
	{
	case '\a':
		if (f == FONT_ITALIC || f < 0)
			s++;
		if (f > 0)
			f = 0;
		break;
	case '\b':
		if (f == FONT_BOLD || f < 0)
			s++;
		if (f > 0)
			f = 0;
		break;
	case '\v':
		if (f == FONT_LITERAL || f < 0)
			s++;
		if (f > 0)
			f = 0;
		break;
	default:
		if (f > 0)
			sfputr(sp, font(f, style, 1), -1);
		break;
	}
	for (;;)
	{
		if (s >= e)
		{
			if (!(tsp = psp))
				goto restore;
			s = psp->ob;
			e = psp->oe;
			psp = psp->next;
			free(tsp);
			continue;
		}
		switch (c = *s++)
		{
		case '(':
			if (n)
			{
				n = 0;
				if (f > 0)
				{
					sfputr(sp, font(f, style, 0), -1);
					f = 0;
				}
			}
			break;
		case '?':
		case ':':
		case ']':
			if (psp && psp->ch)
				break;
			if (y)
			{
				if (va & OPT_optional)
					sfputc(sp, '[');
				sfputc(sp, '=');
				label(sp, 0, y, 0, -1, 0, style, f >= 0 ? FONT_ITALIC : f, ip, version, id, catalog);
				if (va & OPT_optional)
					sfputc(sp, ']');
				y = 0;
			}
			switch (c)
			{
			case '?':
				if (*s == '?')
					s++;
				else if (*s == ']' && *(s + 1) != ']')
					continue;
				else if (sep)
					goto restore;
				else if (X(catalog) && (tsp = localize(psp, s, e, 0, 1, ip, version, id, catalog)))
				{
					psp = tsp;
					s = psp->nb;
					e = psp->ne;
				}
				break;
			case ']':
				if (sep && *s++ != ']')
					goto restore;
				break;
			case ':':
				if (sep && *s++ != ':')
					goto restore;
				break;
			}
			break;
		case '\a':
			a = FONT_ITALIC;
		setfont:
			if (f >= 0)
			{
				if (f & ~a)
				{
					sfputr(sp, font(f, style, 0), -1);
					f = 0;
				}
				if (!f && style == STYLE_html)
				{
					for (t = s; t < e && !isspace(*t) && !iscntrl(*t); t++);
					if (*t == c && *++t == '(')
					{
						w = t;
						if (++t < e && isdigit(*t))
							while (++t < e && isupper(*t));
						if (t < e && *t == ')' && t > w + 1)
						{
							sfprintf(sp, "<NOBR><A href=\"../man%-.*s/"
								, t - w - 1, w + 1
								);
							for (q = s; q < w - 1; q++)
								if (*q == ':' && q < w - 2 && *(q + 1) == ':')
								{
									sfputc(sp, '-');
									q++;
								}
								else
									sfputc(sp, *q);
							sfprintf(sp, ".html\">%s%-.*s%s</A>%-.*s</NOBR>"
								, font(a, style, 1)
								, w - s - 1, s
								, font(a, style, 0)
								, t - w + 1, w
								);
							s = t + 1;
							continue;
						}
					}
				}
				sfputr(sp, font(a, style, !!(f ^= a)), -1);
			}
			continue;
		case '\b':
			a = FONT_BOLD;
			goto setfont;
		case '\f':
			psp = info(psp, s, e, ip, id);
			if (psp->nb)
			{
				s = psp->nb;
				e = psp->ne;
			}
			else
			{
				s = psp->ob;
				psp = psp->next;
			}
			continue;
		case '\n':
			sfputc(sp, c);
			for (i = 0; i < level; i++)
				sfputc(sp, '\t');
			continue;
		case '\v':
			a = FONT_LITERAL;
			goto setfont;
		case '<':
			if (style == STYLE_html)
			{
				sfputr(sp, "&lt;", -1);
				c = 0;
				for (t = s; t < e; t++)
					if (!isalnum(*t) && *t != '_' && *t != '.' && *t != '-')
					{
						if (*t == '@')
						{
							if (c)
								break;
							c = 1;
						}
						else if (*t == '>')
						{
							if (c)
							{
								sfprintf(sp, "<A href=\"mailto:%-.*s>%-.*s</A>&gt;", t - s, s, t - s, s);
								s = t + 1;
							}
							break;
						}
						else
							break;
					}
				continue;
			}
			break;
		case '>':
			if (style == STYLE_html)
			{
				sfputr(sp, "&gt;", -1);
				continue;
			}
			break;
		case '&':
			if (style == STYLE_html)
			{
				sfputr(sp, "&amp;", -1);
				continue;
			}
			break;
		case '"':
			if (style == STYLE_html)
			{
				sfputr(sp, "&quot;", -1);
				continue;
			}
			break;
		case '-':
			if (ostyle == STYLE_nroff)
				sfputc(sp, '\\');
			break;
		case '.':
			if (ostyle == STYLE_nroff)
			{
				sfputc(sp, '\\');
				sfputc(sp, '&');
			}
			break;
		case '\\':
			if (ostyle == STYLE_nroff)
			{
				c = 'e';
				sfputc(sp, '\\');
			}
			break;
		case ' ':
			if (ostyle == STYLE_nroff)
				sfputc(sp, '\\');
			break;
		}
		sfputc(sp, c);
	}
 restore:
	if (f > 0)
		sfputr(sp, font(f, style, 0), -1);
	if (about)
		sfputc(sp, ')');
	if (psp)
		pop(psp);
	return r;
}

/*
 * output args description to sp from p of length n
 */

static void
args(register Sfio_t* sp, register char* p, register int n, int flags, int style, Sfio_t* ip, int version, char* id, char* catalog)
{
	register int	i;
	register char*	t;
	register char*	o;
	register char*	a = 0;
	char*		b;
	int		sep;

	if (flags & OPT_functions)
		sep = '\t';
	else
	{
		sep = ' ';
		o = T(NiL, ID, "options");
		b = style == STYLE_nroff ? "\\ " : " ";
		for (;;)
		{
			t = (char*)memchr(p, '\n', n);
			if (style >= STYLE_man)
			{
				int firstline = !a;
				/* --man page: print command name */
				if (!(a = id))
					a = "...";
				sfprintf(sp, "\t%s%s%s", font(FONT_BOLD, style, 1), a, font(FONT_BOLD, style, 0));
				if (firstline)
				{
					/* Append "[ options ]" label */
					sfprintf(sp, "%s[%s%s%s%s%s]",
						b, b, font(FONT_ITALIC, style, 1), o, font(FONT_ITALIC, style, 0), b);
				}
			}
			else if (a)
			{
				/* Usage/--help, line 2+: specific usages. Prefix by "Or:" */
				sfprintf(sp, "%*.*s%s%s", OPT_USAGE - 1, OPT_USAGE - 1, T(NiL, ID, "Or:"), b, a);
			}
			else
			{
				/* Usage on unknown long option error: no short options are printed, so print "[ options ]" */
				if (!(a = error_info.id) && !(a = id))
					a = "...";
				if (!sfstrtell(sp))
					sfprintf(sp, "[%s%s%s]", b, o, b);
			}
			if (!t)
				break;
			i = ++t - p;
			if (i)
			{
				/* Print options for usage line */
				sfputr(sp, b, -1);
				if (X(catalog))
				{
					sfwrite(ip, p, i);
					if (b = sfstruse(ip))
						sfputr(sp, T(id, catalog, b), -1);
					else
						sfwrite(sp, p, i);
				}
				else
					sfwrite(sp, p, i);
			}
			/* New line */
			if (style == STYLE_html)
				sfputr(sp, "<BR>", '\n');
			else if (style == STYLE_nroff)
				sfputr(sp, ".br", '\n');
			else if (style == STYLE_api)
				sfputr(sp, ".BR", '\n');
			p = t;
			n -= i;
			while (n > 0 && (*p == ' ' || *p == '\t'))
			{
				p++;
				n--;
			}
		}
	}
	/* Print options for the last usage line */
	if (n)
		label(sp, sep, p, 0, n, 0, style, 0, ip, version, id, catalog);
	/* In usage/--help messages, tell the user how to get more help */
	if (style < STYLE_man)
	{
		sfprintf(sp, "\n%*.*s%s%s [%s--help%s|%s--man%s] 2>&1",
			OPT_USAGE - 1, OPT_USAGE - 1, T(NiL, ID, "Help:"), b, a, b, b, b, b);
	}
}

/*
 * output [+-...label...?...] label s to sp
 * according to {...} level and style
 * return 0:header 1:paragraph
 */

static int
item(Sfio_t* sp, char* s, int about, int level, int style, Sfio_t* ip, int version, char* id, char* catalog, int* hflags)
{
	register char*	t;
	int		n;
	int		par;

	sfputc(sp, '\n');
	if (*s == '\n')
	{
		par = 0;
		if (style >= STYLE_nroff)
			sfprintf(sp, ".DS\n");
		else
		{
			if (style == STYLE_html)
				sfprintf(sp, "<PRE>\n");
			else
				sfputc(sp, '\n');
			for (n = 0; n < level; n++)
				sfputc(sp, '\t');
		}
		label(sp, 0, s + 1, about, -1, level, style, FONT_LITERAL, ip, version, id, catalog);
		sfputc(sp, '\n');
		if (style >= STYLE_nroff)
			sfprintf(sp, ".DE");
		else if (style == STYLE_html)
			sfprintf(sp, "</PRE>");
	}
	else if (*s != ']' && (*s != '?' || *(s + 1) == '?'))
	{
		par = 0;
		if (level)
		{
			if (style >= STYLE_nroff)
				sfprintf(sp, ".H%d ", (level - (level > 2)) / 2);
			else
				for (n = 0; n < level; n++)
					sfputc(sp, '\t');
		}
		if (style == STYLE_html)
		{
			if (!level)
			{
				if (*hflags & HELP_head)
					sfputr(sp, "</DIV>", '\n');
				else
					*hflags |= HELP_head;
				sfputr(sp, "<H4>", -1);
			}
			sfputr(sp, "<A name=\"", -1);
			if (s[-1] == '-' && s[0] == 'l' && s[1] == 'i' && s[2] == 'c' && s[3] == 'e' && s[4] == 'n' && s[5] == 's' && s[6] == 'e' && s[7] == '?')
				for (t = s + 8; *t && *t != ']'; t++)
					if (t[0] == 'p' && (!strncmp(t, "proprietary", 11) || !strncmp(t, "private", 7)) || t[0] == 'n' && !strncmp(t, "noncommercial", 13))
					{
						state.flags |= OPT_proprietary;
						break;
					}
			label(sp, 0, s, about, -1, level, style, -1, ip, version, id, catalog);
			sfputr(sp, "\">", -1);
			label(sp, 0, s, about, -1, level, style, level ? FONT_BOLD : 0, ip, version, id, catalog);
			sfputr(sp, "</A>", -1);
			if (!level)
			{
				if (!strncmp(s, C("SYNOPSIS"), strlen(C("SYNOPSIS"))))
					sfputr(sp, "</H4>\n<DIV class=SY>", -1);
				else
				{
					sfputr(sp, "</H4>\n<DIV class=SH>", -1);
					if (!strncmp(s, C("NAME"), strlen(C("NAME"))) || !strncmp(s, C("PLUGIN"), strlen(C("PLUGIN"))))
						*hflags |= HELP_index;
				}
			}
		}
		else
		{
			if (!level)
			{
				if (style >= STYLE_nroff)
					sfprintf(sp, ".SH ");
				else if (style == STYLE_man)
					sfputc(sp, '\n');
				else if (style != STYLE_options && style != STYLE_match || *s == '-' || *s == '+')
					sfputc(sp, '\t');
			}
			label(sp, 0, s, about, -1, level, style, FONT_BOLD, ip, version, id, catalog);
		}
	}
	else
	{
		par = 1;
		if (style >= STYLE_nroff)
			sfputr(sp, level ? ".SP" : ".PP", -1);
	}
	if (style >= STYLE_nroff || !level)
		sfputc(sp, '\n');
	if (par && style < STYLE_nroff)
		for (n = 0; n < level; n++)
			sfputc(sp, '\t');
	return par;
}

/*
 * output text to sp from p according to style
 */

#if _BLD_DEBUG

static char*	textout(Sfio_t*, char*, char*, int, int, int, int, Sfio_t*, int, char*, char*, int*);

static char*
trace_textout(Sfio_t* sp, register char* p, char* conform, int conformlen, int style, int level, int bump, Sfio_t* ip, int version, char* id, char* catalog, int* hflags, int line)
{
	static int	depth = 0;

	message((-21, "opthelp: txt#%d +++ %2d \"%s\" style=%d level=%d bump=%d", line, ++depth, show(p), style, level, bump));
	p = textout(sp, p, conform, conformlen, style, level, bump, ip, version, id, catalog, hflags);
	message((-21, "opthelp: txt#%d --- %2d \"%s\"", line, depth--, show(p)));
	return p;
}

#endif

static char*
textout(Sfio_t* sp, register char* s, char* conform, int conformlen, int style, int level, int bump, Sfio_t* ip, int version, char* id, char* catalog, int* hflags)
{
#if _BLD_DEBUG
#define textout(sp,s,conform,conformlen,style,level,bump,ip,version,id,catalog,hflags)	trace_textout(sp,s,conform,conformlen,style,level,bump,ip,version,id,catalog,hflags,__LINE__)
#endif
	register char*	t;
	register int	c;
	register int	n;
	char*		w;
	char*		q;
	int		a;
	int		f;
	int		par;
	int		about;
	Push_t*		tsp;

	int		ident = 0;
	int		lev = level;
	Push_t*		psp = 0;

 again:
	about = 0;
	if ((c = *s) == GO)
	{
		for (;;)
		{
			while (*(s = next(s + 1, version)) == '\n');
			if (*s == GO)
			{
				if (level > 1)
					level++;
				level++;
			}
			else if (*s != OG)
			{
				if (level <= 1 || *s != '[' || *(s + 1) != '-' || style == STYLE_man && *(s + 2) == '?' || isalpha(*(s + 2)))
					break;
				s = skip(s, 0, 0, 0, 1, level, 0, version);
			}
			else if ((level -= 2) <= lev)
				return s + 1;
		}
		if (*s == '\f')
		{
			psp = info(psp, s + 1, NiL, ip, id);
			if (psp->nb)
				s = psp->nb;
			else
			{
				s = psp->ob;
				psp = psp->next;
			}
		}
		if (*s != '[')
			return s;
		c = *++s;
		if (level > 1)
			level++;
		level++;
	}
	if (c == '-' && level > 1)
	{
		if (style == STYLE_man)
		{
			about = 1;
			if (*(s + 1) == '-')
				s++;
		}
		else
			for (;;)
			{
				s = skip(s, 0, 0, 0, 1, level, 0, version);
				while (*(s = next(s + 1, version)) == '\n');
				if (*s == '[')
				{
					if ((c = *++s) != '-')
						break;
				}
				else if (*s == GO)
					goto again;
				else if (*s == OG)
					return s + 1;
			}
	}
	if (c == '+' || c == '-' && (bump = 3) || c != ' ' && level > 1)
	{
		s = skip(t = s + 1, '?', 0, 0, 1, level, 0, version);
		if (c == '-' && (*t == '?' || isdigit(*t) || *s == '?' && *(s + 1) == '\n'))
		{
			if ((c = *s) != '?')
				return skip(s, 0, 0, 0, 1, level, 1, version);
			w = C("version");
			par = item(sp, w, about, level, style, ip, version, id, ID, hflags);
			for (;;)
			{
				while (isspace(*(s + 1)))
					s++;
				w = s;
				if (w[1] == '@' && w[2] == '(' && w[3] == '#' && w[4] == ')')
					s = w + 4;
				else if (w[1] == '$' && w[2] == 'I' && w[3] == 'd' && w[4] == ':' && w[5] == ' ')
				{
					s = w + 5;
					ident = 1;
				}
				else
					break;
			}
		}
		else
		{
			if (isdigit(c) && isdigit(*t))
			{
				while (isdigit(*t))
					t++;
				if (*t == ':')
					t++;
			}
			else if (isalnum(c) && *t-- == ':')
			{
				if (X(catalog) || *t == *(t + 2))
					t += 2;
				else
				{
					sfprintf(ip, "%s", t);
					if (w = sfstruse(ip))
						*((t = w) + 1) = '|';
				}
			}
			par = item(sp, t, about, level, style, ip, version, id, catalog, hflags);
			c = *s;
		}
		if (!about && level)
			par = 0;
	}
	else
	{
		if (style >= STYLE_nroff)
			sfputc(sp, '\n');
		else if (c == '?')
			for (n = 0; n < level; n++)
				sfputc(sp, '\t');
		par = 0;
	}
	if (c == ':')
		c = *(s = skip(s, '?', 0, 0, 1, 0, 0, version));
	if ((c == ']' || c == '?' && *(s + 1) == ']' && *(s + 2) != ']' && s++) && (c = *(s = next(s + 1, version))) == GO)
	{
		s = textout(sp, s, conform, conformlen, style, level + bump + par + 1, 0, ip, version, id, catalog, hflags);
		if (level > lev && *s && *(s = next(s, version)) == '[')
		{
			s++;
			message((-21, "textout#%d s=%s", __LINE__, show(s)));
			goto again;
		}
	}
	else if (c == '?' || c == ' ')
	{
		s++;
		if (c == ' ')
			sfputc(sp, c);
		else
		{
			if (X(catalog) && (tsp = localize(psp, s, NiL, 0, 1, ip, version, id, catalog)))
			{
				psp = tsp;
				s = psp->nb;
			}
			if (style < STYLE_nroff)
				for (n = 0; n < bump + 1; n++)
					sfputc(sp, '\t');
		}
		if (conform)
		{
			sfprintf(sp, "[%-.*s %s] ", conformlen, conform, T(NiL, ID, "conformance"));
			conform = 0;
		}
		if (*hflags & HELP_index)
		{
			*hflags &= ~HELP_index;
			sfputr(sp, "<!--MAN-INDEX-->", -1);
		}
		f = 0;
		for (;;)
		{
			switch (c = *s++)
			{
			case 0:
				if (!(tsp = psp))
				{
					if (f)
						sfputr(sp, font(f, style, 0), -1);
					return s - 1;
				}
				s = psp->ob;
				psp = psp->next;
				free(tsp);
				continue;
			case ']':
				if (psp && psp->ch)
					break;
				if (*s != ']')
				{
					if (f)
					{
						sfputr(sp, font(f, style, 0), -1);
						f = 0;
					}
					for (;;)
					{
						if ((*s == '#' || *s == ':') && level > lev)
						{
							char*	o;
							char*	v;
							int	j;
							int	m;
							int	ol;
							int	vl;

							a = 0;
							o = 0;
							v = 0;
							if (*++s == '?' || *s == *(s - 1))
							{
								s++;
								a |= OPT_optional;
							}
							if (*(s = next(s, version)) == '[')
							{
								s = skip(s + 1, ':', '?', 0, 1, 0, 0, version);
								while (*s == ':')
								{
									s = skip(t = s + 1, ':', '?', 0, 1, 0, 0, version);
									m = s - t;
									if (*t == '!')
									{
										o = t + 1;
										ol = m - 1;
									}
									else if (*t == '=')
									{
										v = t + 1;
										vl = m - 1;
									}
									else
										for (j = 0; j < elementsof(attrs); j++)
											if (strneq(t, attrs[j].name, m))
											{
												a |= attrs[j].flag;
												break;
											}
								}
							}
							if (a & OPT_optional)
							{
								if (o)
								{
									sfprintf(sp, " %s ", T(NiL, ID, "If the option value is omitted then"));
									sfputr(sp, font(FONT_BOLD, style, 1), -1);
									t = o + ol;
									while (o < t)
									{
										if (((c = *o++) == ':' || c == '?') && *o == c)
											o++;
										sfputc(sp, c);
									}
									sfputr(sp, font(FONT_BOLD, style, 0), -1);
									sfprintf(sp, " %s.", T(NiL, ID, "is assumed"));
								}
								else
									sfprintf(sp, " %s", T(NiL, ID, "The option value may be omitted."));
							}
							if (v)
							{
								sfprintf(sp, " %s ", T(NiL, ID, "The default value is"));
								sfputr(sp, font(FONT_BOLD, style, 1), -1);
								t = v + vl;
								while (v < t)
								{
									if (((c = *v++) == ':' || c == '?') && *v == c)
										v++;
									sfputc(sp, c);
								}
								sfputr(sp, font(FONT_BOLD, style, 0), -1);
								sfputc(sp, '.');
							}
							s = skip(s, 0, 0, 0, 1, 0, 1, version);
						}
						if (*(s = next(s, version)) == GO)
						{
							s = textout(sp, s, 0, 0, style, level + bump + !level, 0, ip, version, id, catalog, hflags);
							if (*s && *(s = next(s, version)) == '[' && !isalnum(*(s + 1)))
							{
								s++;
								message((-21, "textout#%d s=%s", __LINE__, show(s)));
								goto again;
							}
						}
						else if (*s == '[' && level > lev)
						{
							s++;
							goto again;
						}
						else if (*s == '\f')
						{
							s++;
							if (style != STYLE_keys)
							{
								psp = info(psp, s, NiL, ip, id);
								if (psp->nb)
									s = psp->nb;
								else
								{
									s = psp->ob;
									psp = psp->next;
								}
							}
						}
						else if (!*s)
						{
							if (!(tsp = psp))
								break;
							s = psp->ob;
							psp = psp->next;
							free(tsp);
						}
						else if (*s != OG)
							break;
						else
						{
							s++;
							if ((level -= 2) <= lev)
								break;
						}
					}
					return s;
				}
				s++;
				break;
			case '\a':
				a = FONT_ITALIC;
			setfont:
				if (f & ~a)
				{
					sfputr(sp, font(f, style, 0), -1);
					f = 0;
				}
				if (!f && style == STYLE_html)
				{
					for (t = s; *t && !isspace(*t) && !iscntrl(*t); t++);
					if (*t == c && *++t == '(')
					{
						w = t;
						if (isdigit(*++t))
							while (isupper(*++t));
						if (*t == ')' && t > w + 1)
						{
							sfprintf(sp, "<NOBR><A href=\"../man%-.*s/"
								, t - w - 1, w + 1
								);
							for (q = s; q < w - 1; q++)
								if (*q == ':' && q < w - 2 && *(q + 1) == ':')
								{
									sfputc(sp, '-');
									q++;
								}
								else
									sfputc(sp, *q);
							sfprintf(sp, ".html\">%s%-.*s%s</A>%-.*s</NOBR>"
								, font(a, style, 1)
								, w - s - 1, s
								, font(a, style, 0)
								, t - w + 1, w
								);
							s = t + 1;
							continue;
						}
					}
				}
				sfputr(sp, font(a, style, !!(f ^= a)), -1);
				continue;
			case '\b':
				a = FONT_BOLD;
				goto setfont;
			case '\f':
				if (style != STYLE_keys)
				{
					psp = info(psp, s, NiL, ip, id);
					if (psp->nb)
						s = psp->nb;
					else
					{
						s = psp->ob;
						psp = psp->next;
					}
				}
				continue;
			case '\v':
				a = FONT_LITERAL;
				goto setfont;
			case ' ':
				if (ident && *s == '$')
				{
					while (*++s)
						if (*s == ']')
						{
							if (*(s + 1) != ']')
								break;
							s++;
						}
					continue;
				}
			case '\n':
			case '\r':
			case '\t':
				while (*s == ' ' || *s == '\t' || *s == '\r' || *s == '\n')
					s++;
				if (*s == ']' && *(s + 1) != ']' && (!psp || !psp->ch))
					continue;
				c = ' ';
				break;
			case '<':
				if (style == STYLE_html)
				{
					sfputr(sp, "&lt;", -1);
					c = 0;
					for (t = s; *t; t++)
						if (!isalnum(*t) && *t != '_' && *t != '.' && *t != '-')
						{
							if (*t == '@')
							{
								if (c)
									break;
								c = 1;
							}
							else if (*t == '>')
							{
								if (c)
								{
									sfprintf(sp, "<A href=\"mailto:%-.*s\">%-.*s</A>&gt;", t - s, s, t - s, s);
									s = t + 1;
								}
								break;
							}
							else
								break;
						}
					continue;
				}
				break;
			case '>':
				if (style == STYLE_html)
				{
					sfputr(sp, "&gt;", -1);
					continue;
				}
				break;
			case '&':
				if (style == STYLE_html)
				{
					sfputr(sp, "&amp;", -1);
					continue;
				}
				break;
			case '-':
				if (style == STYLE_nroff)
					sfputc(sp, '\\');
				break;
			case '.':
				if (style == STYLE_nroff)
				{
					sfputc(sp, '\\');
					sfputc(sp, '&');
				}
				break;
			case '\\':
				if (style == STYLE_nroff)
				{
					sfputc(sp, c);
					c = 'e';
				}
				break;
			}
			sfputc(sp, c);
		}
	}
	else if (c == '[' && level > lev)
	{
		s++;
		goto again;
	}
	return s;
}

/*
 * generate optget() help [...] list from lp
 */

static void
list(Sfio_t* sp, register const List_t* lp)
{
	sfprintf(sp, "[%c", lp->type);
	if (lp->name)
	{
		sfprintf(sp, "%s", lp->name);
		if (lp->text)
			sfprintf(sp, "?%s", lp->text);
	}
	sfputc(sp, ']');
}

/*
 * return pointer to help message sans `Usage: command'
 * if oopts is 0 then state.pass is used
 * what:
 *	0	?short by default, ?long if any long options used
 *	*	otherwise see help_text[] (--???)
 * external formatter:
 *	\a...\a	italic
 *	\b...\b	bold
 *	\f...\f	discipline infof callback on ...
 *	\v...\v	literal
 * internal formatter:
 *	\t	indent
 *	\n	newline
 * margin flush pops to previous indent
 */

char*
opthelp(const char* oopts, const char* what)
{
	register Sfio_t*	sp;
	register Sfio_t*	mp;
	register int		c;
	register char*		p;
	register Indent_t*	ip;
	char*			t;
	char*			x;
	char*			w;
	char*			u;
	char*			y;
	char*			s;
	char*			d;
	char*			v;
	char*			cb;
	char*			dt;
	char*			ov;
	char*			pp;
	char*			rb;
	char*			re;
	int			f;
	int			i;
	int			j;
	int			m;
	int			n;
	int			a;
	int			cl;
	int			sl;
	int			vl;
	int			ol;
	int			wl;
	int			xl;
	int			rm;
	int			ts;
	int			co;
	int			z;
	int			style;
	int			head;
	int			margin;
	int			mode;
	int			mutex;
	int			prefix;
	int			version;
	long			tp;
	char*			id;
	char*			catalog;
	Optpass_t*		o;
	Optpass_t*		q;
	Optpass_t*		e;
	Optpass_t		one;
	Optpass_t		top;
	Help_t*			hp;
	Tag_t			ptstk[elementsof(indent) + 2];
	Tag_t*			pt;
	Sfio_t*			vp;
	Push_t*			tsp;

	char*			opts = (char*)oopts;
	char*			section = "1";
	int			flags = 0;
	int			bflags = 0;
	int			dflags = 0;
	int			hflags = 0;
	int			matched = 0;
	int			paragraph = 0;
	Push_t*			psp = 0;
	Sfio_t*			sp_help = 0;
	Sfio_t*			sp_text = 0;
	Sfio_t*			sp_plus = 0;
	Sfio_t*			sp_head = 0;
	Sfio_t*			sp_body = 0;
	Sfio_t*			sp_info = 0;
	Sfio_t*			sp_misc = 0;

	if (!(mp = state.mp) && !(mp = state.mp = sfstropen()))
		goto nospace;
	if (!what)
		style = state.style;
	else if (!*what)
		style = STYLE_options;
	else if (*what != '?')
		style = STYLE_match;
	else if (!*(what + 1))
		style = STYLE_man;
	else if ((hp = (Help_t*)search(styles, elementsof(styles), sizeof(styles[0]), (char*)what + 1)) && hp->style >= 0)
	{
		style = hp->style;
		if (*hp->name != '?')
			what = hp->name;
	}
	else
	{
		if ((style = state.force) < STYLE_man)
			style = STYLE_man;
		if (!(sp_help = sfstropen()))
			goto nospace;
		for (i = 0; i < elementsof(help_head); i++)
			list(sp_help, &help_head[i]);
		for (i = 0; i < elementsof(styles); i++)
			sfprintf(sp_help, "[:%s?%s]", styles[i].match, styles[i].text);
		for (i = 0; i < elementsof(help_tail); i++)
			list(sp_help, &help_tail[i]);
		if (!(opts = sfstruse(sp_help)))
			goto nospace;
	}

	/*
	 * this is a workaround for static optjoin() data
	 * clobbered by plugins/builtins that may be called
	 * evaluating \f...\f -- it would be good to hide
	 * optjoin() interactions a bit more ...
	 */

	top = state.pass[0];
 again:
	if (opts)
	{
		for (i = 0; i < state.npass; i++)
			if (state.pass[i].oopts == opts)
			{
				o = &state.pass[i];
				break;
			}
		if (i >= state.npass)
		{
			o = &one;
			if (init((char*)opts, o))
				goto nospace;
		}
		e = o + 1;
	}
	else
	{
		if (state.npass > 0)
		{
			o = state.pass;
			e = o + state.npass;
		}
		else if (state.npass < 0)
		{
			o = &state.cache->pass;
			e = o + 1;
		}
		else
			return T(NiL, ID, "[* call optget() before opthelp() *]");
		oopts = (const char*)state.pass[0].oopts;
	}
	if (style <= STYLE_usage)
	{
		if (!(sp_text = sfstropen()) || !(sp_info = sfstropen()))
			goto nospace;
		if (style >= STYLE_match && style < STYLE_keys && !(sp_body = sfstropen()))
			goto nospace;
	}
	switch (style)
	{
	case STYLE_api:
	case STYLE_html:
	case STYLE_nroff:
		state.emphasis = 0;
		break;
	case STYLE_usage:
	case STYLE_keys:
		for (q = o; q < e; q++)
			if (!(q->flags & OPT_ignore) && !streq(q->catalog, o->catalog))
				o = q;
		/* FALLTHROUGH */
	case STYLE_posix:
		sfputc(mp, '\f');
		break;
	default:
		state.emphasis = 0;
		if (x = getenv("ERROR_OPTIONS"))
		{
			if (strmatch(x, "*noemphasi*"))
				break;
			if (strmatch(x, "*emphasi*"))
			{
				state.emphasis = 1;
				break;
			}
		}
		if (isatty(sffileno(sfstderr))
		&& (x = getenv("TERM"))
		&& strmatch(x, "(ansi|cons|dtterm|linux|screen|sun|vt???|wsvt|xterm)*"))
			state.emphasis = 1;
		break;
	}
	x = "";
	xl = 0;
	for (q = o; q < e; q++)
	{
		if (q->flags & OPT_ignore)
			continue;
		section = q->section;
		flags |= q->flags;
		p = q->opts;
		prefix = q->prefix;
		version = q->version;
		id = q->id;
		catalog = q->catalog;
		switch (style)
		{
		case STYLE_usage:
			if (xl)
				sfputc(mp, '\n');
			else
				xl = 1;
			psp = 0;
			for (;;)
			{
				switch (c = *p++)
				{
				case 0:
					if (!(tsp = psp))
						goto style_usage;
					p = psp->ob;
					psp = psp->next;
					free(tsp);
					continue;
				case '\a':
					c = 'a';
					break;
				case '\b':
					c = 'b';
					break;
				case '\f':
					psp = info(psp, p, NiL, sp_info, id);
					if (psp->nb)
						p = psp->nb;
					else
					{
						p = psp->ob;
						psp = psp->next;
					}
					continue;
				case '\n':
					c = 'n';
					break;
				case '\r':
					c = 'r';
					break;
				case '\t':
					c = 't';
					break;
				case '\v':
					c = 'v';
					break;
				case '"':
					c = '"';
					break;
				case '\'':
					c = '\'';
					break;
				case '\\':
					c = '\\';
					break;
				default:
					sfputc(mp, c);
					continue;
				}
				sfputc(mp, '\\');
				sfputc(mp, c);
			}
		style_usage:
			continue;
		case STYLE_keys:
			a = 0;
			psp = 0;
			vl = 0;
			for (;;)
			{
				if (!(c = *p++))
				{
					if (!(tsp = psp))
						break;
					p = psp->ob;
					psp = psp->next;
					free(tsp);
					continue;
				}
				if (c == '\f')
				{
					psp = info(psp, p, NiL, sp_info, id);
					if (psp->nb)
						p = psp->nb;
					else
					{
						p = psp->ob;
						psp = psp->next;
					}
					continue;
				}
				f = z = 1;
				t = 0;
				if (a == 0 && (c == ' ' || c == '\n' && *p == '\n'))
				{
					if (c == ' ' && *p == ']')
					{
						p++;
						continue;
					}
					if (*p == '\n')
						p++;
					a = c;
				}
				else if (c == '\n')
				{
					if (a == ' ')
						a = -1;
					else if (a == '\n' || *p == '\n')
					{
						a = -1;
						p++;
					}
					continue;
				}
				else if ((c == ':' || c == '#') && (*p == '[' || *p == '?' && *(p + 1) == '[' && p++))
					p++;
				else if (c != '[')
				{
					if (c == GO)
						vl++;
					else if (c == OG)
						vl--;
					continue;
				}
				else if (*p == ' ')
				{
					p++;
					continue;
				}
				else if (*p == '-')
				{
					z = 0;
					if (*++p == '-')
					{
						p = skip(p, 0, 0, 0, 1, 0, 1, version);
						continue;
					}
				}
				else if (*p == '+')
				{
					p++;
					if (vl > 0 && *p != '\a')
					{
						f = 0;
						p = skip(p, '?', 0, 0, 1, 0, 0, version);
						if (*p == '?')
							p++;
					}
				}
				else
				{
					if (*(p + 1) == '\f' && (vp = state.vp))
						p = expand(p + 2, NiL, &t, vp, id);
					p = skip(p, ':', '?', 0, 1, 0, 0, version);
					if (*p == ':')
						p++;
				}
				if (f && *p == '?' && *(p + 1) != '?')
				{
					f = 0;
					if (z)
						p++;
					else
						p = skip(p, 0, 0, 0, 1, 0, 0, version);
				}
				if (*p == ']' && *(p + 1) != ']')
				{
					p++;
					continue;
				}
				if (!*p)
				{
					if (!t)
						break;
					p = t;
					t = 0;
				}
				m = sfstrtell(mp);
				sfputc(mp, '"');
				xl = 1;
				/*UNDENT...*/

	for (;;)
	{
		if (!(c = *p++))
		{
			if (t)
			{
				p = t;
				t = 0;
			}
			if (!(tsp = psp))
			{
				p--;
				break;
			}
			p = psp->ob;
			psp = psp->next;
			free(tsp);
			continue;
		}
		if (a > 0)
		{
			if (c == '\n')
			{
				if (a == ' ')
				{
					a = -1;
					break;
				}
				if (a == '\n' || *p == '\n')
				{
					a = -1;
					p++;
					break;
				}
			}
		}
		else if (c == ']')
		{
			if (*p != ']')
			{
				sfputc(mp, 0);
				y = sfstrbase(mp) + m + 1;
				if (D(y) || !strmatch(y, KEEP) || strmatch(y, OMIT))
				{
					sfstrseek(mp, m, SEEK_SET);
					xl = 0;
				}
				else
					sfstrseek(mp, -1, SEEK_CUR);
				break;
			}
			sfputc(mp, *p++);
			continue;
		}
		switch (c)
		{
		case '?':
			if (f)
			{
				if (*p == '?')
				{
					p++;
					sfputc(mp, c);
				}
				else
				{
					f = 0;
					sfputc(mp, 0);
					y = sfstrbase(mp) + m + 1;
					if (D(y) || !strmatch(y, KEEP) || strmatch(y, OMIT))
					{
						sfstrseek(mp, m, SEEK_SET);
						xl = 0;
					}
					else
						sfstrseek(mp, -1, SEEK_CUR);
					if (z && (*p != ']' || *(p + 1) == ']'))
					{
						if (xl)
						{
							sfputc(mp, '"');
							sfputc(mp, '\n');
						}
						m = sfstrtell(mp);
						sfputc(mp, '"');
						xl = 1;
					}
					else
					{
						p = skip(p, 0, 0, 0, 1, 0, 0, version);
						if (*p == '?')
							p++;
					}
				}
			}
			else
				sfputc(mp, c);
			continue;
		case ':':
			if (f && *p == ':')
				p++;
			sfputc(mp, c);
			continue;
		case '\a':
			c = 'a';
			break;
		case '\b':
			c = 'b';
			break;
		case '\f':
			c = 'f';
			break;
		case '\n':
			c = 'n';
			break;
		case '\r':
			c = 'r';
			break;
		case '\t':
			c = 't';
			break;
		case '\v':
			c = 'v';
			break;
		case '"':
			c = '"';
			break;
		case '\\':
			c = '\\';
			break;
		case CC_esc:
			c = 'E';
			break;
		default:
			sfputc(mp, c);
			continue;
		}
		sfputc(mp, '\\');
		sfputc(mp, c);
	}

				/*...INDENT*/
				if (xl)
				{
					sfputc(mp, '"');
					sfputc(mp, '\n');
				}
			}
			continue;
		}
		z = 0;
		head = 0;
		mode = 0;
		mutex = 0;
		if (style > STYLE_short && style < STYLE_nroff && version < 1)
		{
			style = STYLE_short;
			if (sp_body)
			{
				sfclose(sp_body);
				sp_body = 0;
			}
		}
		else if (style == STYLE_short && prefix < 2)
			style = STYLE_long;
		if (*p == ':')
			p++;
		if (*p == '+')
		{
			p++;
			if (!(sp = sp_plus) && !(sp = sp_plus = sfstropen()))
				goto nospace;
		}
		else if (style >= STYLE_match)
			sp = sp_body;
		else
			sp = sp_text;
		psp = 0;
		for (;;)
		{
			if (!(*(p = next(p, version))))
			{
				if (!(tsp = psp))
					break;
				p = psp->ob;
				psp = psp->next;
				free(tsp);
				continue;
			}
			if (*p == '\f')
			{
				psp = info(psp, p + 1, NiL, sp_info, id);
				if (psp->nb)
					p = psp->nb;
				else
				{
					p = psp->ob;
					psp = psp->next;
				}
				continue;
			}
			if (*p == '\n' || *p == ' ')
			{
				if (*(x = p = next(p + 1, version)))
					while (*++p)
						if (*p == '\n')
						{
							while (*++p == ' ' || *p == '\t' || *p == '\r');
							if (*p == '\n')
								break;
						}
				xl = p - x;
				if (!*p)
					break;
				continue;
			}
			if (*p == OG)
			{
				p++;
				continue;
			}
			message((-20, "opthelp: opt %s", show(p)));
			if (z < 0)
				z = 0;
			a = 0;
			f = 0;
			w = 0;
			d = 0;
			s = 0;
			rb = re = 0;
			sl = 0;
			vl = 0;
			if (*p == '[')
			{
				if ((c = *(p = next(p + 1, version))) == '(')
				{
					p = nest(cb = p);
					cl = p - cb;
					c = *p;
				}
				else
					cb = 0;
				if (c == '-')
				{
					if (style >= STYLE_man)
					{
						if (*(p + 1) != '-')
						{
							if (!sp_misc && !(sp_misc = sfstropen()))
								goto nospace;
							else
								p = textout(sp_misc, p, cb, cl, style, 1, 3, sp_info, version, id, catalog, &hflags);
							continue;
						}
					}
					else if (style == STYLE_match && *what == '-')
					{
						if (*(p + 1) == '?' || *(s = skip(p + 1, ':', '?', 0, 1, 0, 0, version)) == '?' && isspace(*(s + 1)))
							s = C("version");
						else
							s = p + 1;
						w = (char*)what;
						if (*s != '-' || *(w + 1) == '-')
						{
							if (*s == '-')
								s++;
							if (*(w + 1) == '-')
								w++;
							if (match(w + 1, s, version, id, catalog))
							{
								if (*(p + 1) == '-')
									p++;
								p = textout(sp, p, cb, cl, style, 1, 3, sp_info, version, id, catalog, &hflags);
								matched = -1;
								continue;
							}
						}
					}
					if (!z)
						z = -1;
				}
				else if (c == '+')
				{
					if (style >= STYLE_man)
					{
						p = textout(sp_body, p, cb, cl, style, 0, 0, sp_info, version, id, catalog, &bflags);
						if (!sp_head)
						{
							sp_head = sp_body;
							hflags = dflags = bflags;
							if (!(sp_body = sfstropen()))
								goto nospace;
						}
						continue;
					}
					else if (style == STYLE_match && *what == '+')
					{
						if (paragraph)
						{
							if (p[1] == '?')
							{
								p = textout(sp, p, cb, cl, style, 1, 3, sp_info, version, id, catalog, &hflags);
								continue;
							}
							paragraph = 0;
						}
						if (match((char*)what + 1, p + 1, version, id, catalog))
						{
							p = textout(sp, p, cb, cl, style, 1, 3, sp_info, version, id, catalog, &hflags);
							matched = -1;
							paragraph = 1;
							continue;
						}
					}
					if (!z)
						z = -1;
				}
				else if (c == '[' || version < 1)
				{
					mutex++;
					continue;
				}
				else
				{
					if (c == '!')
					{
						a |= OPT_invert;
						p++;
					}
					rb = p;
					if (*p != ':')
					{
						s = p;
						if (*(p + 1) == '|')
						{
							while (*++p && *p != '=' && *p != '!' && *p != ':' && *p != '?');
							if ((p - s) > 1)
								sl = p - s;
							if (*p == '!')
								a |= OPT_invert;
						}
						if (*(p + 1) == '\f')
							p++;
						else
							p = skip(p, ':', '?', 0, 1, 0, 0, version);
						if (sl || (p - s) == 1 || *(s + 1) == '=' || *(s + 1) == '!' && (a |= OPT_invert) || *(s + 1) == '|')
							f = *s;
					}
					re = p;
					if (style <= STYLE_short)
					{
						if (!z && !f)
							z = -1;
					}
					else
					{
						if (*p == '\f' && (vp = state.vp))
							p = expand(p + 1, NiL, &t, vp, id);
						else
							t = 0;
						if (*p == ':')
						{
							p = skip(w = p + 1, ':', '?', 0, 1, 0, 0, version);
							if (!(wl = p - w))
								w = 0;
						}
						else
							wl = 0;
						if (*p == ':' || *p == '?')
						{
							d = p;
							p = skip(p, 0, 0, 0, 1, 0, 0, version);
						}
						else
							d = 0;
						if (style == STYLE_match)
						{
							if (wl && !match((char*)what, w, version, id, catalog))
								wl = 0;
							if ((!wl || *w == ':' || *w == '?') && (what[1] || sl && !memchr(s, what[0], sl) || !sl && what[0] != f))
							{
								w = 0;
								if (!z)
									z = -1;
							}
							else
								matched = 1;
						}
						if (t)
						{
							p = t;
							if (*p == ':' || *p == '?')
							{
								d = p;
								p = skip(p, 0, 0, 0, 1, 0, 0, version);
							}
						}
					}
				}
				p = skip(p, 0, 0, 0, 1, 0, 1, version);
				if (*p == GO)
					p = skip(p + 1, 0, 0, 0, 0, 1, 1, version);
			}
			else if (*p == ']')
			{
				if (mutex)
				{
					if (style >= STYLE_nroff)
						sfputr(sp_body, "\n.OP - - anyof", '\n');
					if (!(mutex & 1))
					{
						mutex--;
						if (style <= STYLE_long)
						{
							sfputc(sp_body, ' ');
							sfputc(sp_body, ']');
						}
					}
					mutex--;
				}
				p++;
				continue;
			}
			else if (*p == '?')
			{
				if (style < STYLE_match)
					z = 1;
				mode |= OPT_hidden;
				p++;
				continue;
			}
			else if (*p == '\\' && style==STYLE_posix)
			{
				if (*++p)
					p++;
				continue;
			}
			else
			{
				f = *p++;
				s = 0;
				if (style == STYLE_match && !z)
					z = -1;
			}
			if (!z)
			{
				if (style == STYLE_long || prefix < 2 || (q->flags & OPT_long))
					f = 0;
				else if (style <= STYLE_short)
					w = 0;
				if (!f && !w)
					z = -1;
			}
			ov = 0;
			u = v = y = 0;
			if (*p == ':' && (a |= OPT_string) || *p == '#' && (a |= OPT_number))
			{
				message((-21, "opthelp: arg %s", show(p)));
				if (*++p == '?' || *p == *(p - 1))
				{
					p++;
					a |= OPT_optional;
				}
				if (*(p = next(p, version)) == '[')
				{
					if (!z)
					{
						p = skip(y = p + 1, ':', '?', 0, 1, 0, 0, version);
						while (*p == ':')
						{
							p = skip(t = p + 1, ':', '?', 0, 1, 0, 0, version);
							m = p - t;
							if (*t == '!')
							{
								ov = t + 1;
								ol = m - 1;
							}
							else if (*t == '=')
							{
								v = t + 1;
								vl = m - 1;
							}
							else
								for (j = 0; j < elementsof(attrs); j++)
									if (strneq(t, attrs[j].name, m))
									{
										a |= attrs[j].flag;
										break;
									}
						}
						if (*p == '?')
							u = p;
						p = skip(p, 0, 0, 0, 1, 0, 1, version);
					}
					else
						p = skip(p + 1, 0, 0, 0, 1, 0, 1, version);
				}
				else
					y = (a & OPT_number) ? T(NiL, ID, "#") : T(NiL, ID, "arg");
			}
			else
				a |= OPT_flag;
			if (!z)
			{
				if (style <= STYLE_short && !y && !mutex || style == STYLE_posix)
				{
					if (style != STYLE_posix && !sfstrtell(sp))
					{
						sfputc(sp, '[');
						if (sp == sp_plus)
							sfputc(sp, '+');
						sfputc(sp, '-');
					}
					if (!sl)
						sfputc(sp, f);
					else
						for (c = 0; c < sl; c++)
							if (s[c] != '|')
								sfputc(sp, s[c]);
					if (style == STYLE_posix && y)
						sfputc(sp, ':');
				}
				else
				{
					if (style >= STYLE_match)
					{
						sfputc(sp_body, '\n');
						if (!head)
						{
							head = 1;
							item(sp_body, (flags & OPT_functions) ? C("FUNCTIONS") : C("OPTIONS"), 0, 0, style, sp_info, version, id, ID, &bflags);
						}
						if (style >= STYLE_nroff)
						{
							if (mutex & 1)
							{
								mutex++;
								sfputr(sp_body, "\n.OP - - oneof", '\n');
							}
						}
						else
							sfputc(sp_body, '\t');
					}
					else
					{
						if (sp_body)
							sfputc(sp_body, ' ');
						else if (!(sp_body = sfstropen()))
							goto nospace;
						if (mutex)
						{
							if (mutex & 1)
							{
								mutex++;
								sfputc(sp_body, '[');
							}
							else
								sfputc(sp_body, '|');
							sfputc(sp_body, ' ');
						}
						else
							sfputc(sp_body, '[');
					}
					if (style >= STYLE_nroff)
					{
						if (flags & OPT_functions)
						{
							sfputr(sp_body, ".FN", ' ');
							if (re > rb)
								sfwrite(sp_body, rb, re - rb);
							else
								sfputr(sp, "void", -1);
							if (w)
								label(sp_body, ' ', w, 0, -1, 0, style, FONT_BOLD, sp_info, version, id, catalog);
						}
						else
						{
							sfputr(sp_body, ".OP", ' ');
							if (sl)
								sfwrite(sp_body, s, sl);
							else
								sfputc(sp_body, f ? f : '-');
							sfputc(sp_body, ' ');
							if (w)
							{
								if (label(sp_body, 0, w, 0, -1, 0, style, 0, sp_info, version, id, catalog))
								{
									sfputc(sp_body, '|');
									label(sp_body, 0, w, 0, -1, 0, style, 0, sp_info, version, id, native);
								}
							}
							else
								sfputc(sp_body, '-');
							sfputc(sp_body, ' ');
							m = a & OPT_TYPE;
							for (j = 0; j < elementsof(attrs); j++)
								if (m & attrs[j].flag)
								{
									sfputr(sp_body, attrs[j].name, -1);
									break;
								}
							if (m = (a & ~m) | mode)
								for (j = 0; j < elementsof(attrs); j++)
									if (m & attrs[j].flag)
									{
										sfputc(sp_body, ':');
										sfputr(sp_body, attrs[j].name, -1);
									}
							sfputc(sp_body, ' ');
							if (y)
								label(sp_body, 0, y, 0, -1, 0, style, 0, sp_info, version, id, catalog);
							else
								sfputc(sp_body, '-');
							if (v)
								sfprintf(sp_body, " %-.*s", vl, v);
						}
					}
					else
					{
						if (f)
						{
							if (sp_body == sp_plus)
								sfputc(sp_body, '+');
							sfputc(sp_body, '-');
							sfputr(sp_body, font(FONT_BOLD, style, 1), -1);
							if (!sl)
							{
								sfputc(sp_body, f);
								if (f == '-' && y)
								{
									y = 0;
									sfputr(sp_body, C("long-option[=value]"), -1);
								}
							}
							else
								sfwrite(sp_body, s, sl);
							sfputr(sp_body, font(FONT_BOLD, style, 0), -1);
							if (w)
							{
								sfputc(sp_body, ',');
								sfputc(sp_body, ' ');
							}
						}
						else if ((flags & OPT_functions) && re > rb)
						{
							sfwrite(sp_body, rb, re - rb);
							sfputc(sp_body, ' ');
						}
						if (w)
						{
							if (prefix > 0)
							{
								sfputc(sp_body, '-');
								if (prefix > 1)
									sfputc(sp_body, '-');
							}
							if (label(sp_body, 0, w, 0, -1, 0, style, FONT_BOLD, sp_info, version, id, catalog))
							{
								sfputc(sp_body, '|');
								label(sp_body, 0, w, 0, -1, 0, style, FONT_BOLD, sp_info, version, id, native);
							}
						}
						if (y)
						{
							if (a & OPT_optional)
								sfputc(sp_body, '[');
							else if (!w)
								sfputc(sp_body, ' ');
							if (w)
								sfputc(sp_body, prefix == 1 ? ' ' : '=');
							label(sp_body, 0, y, 0, -1, 0, style, FONT_ITALIC, sp_info, version, id, catalog);
							if (a & OPT_optional)
								sfputc(sp_body, ']');
						}
					}
					if (style >= STYLE_match)
					{
						if (d)
						{
							textout(sp_body, d, cb, cl, style, 0, 3, sp_info, version, id, catalog, &bflags);
							cb = 0;
						}
						if (u)
							textout(sp_body, u, cb, cl, style, 0, 3, sp_info, version, id, catalog, &bflags);
						if ((a & OPT_invert) && w && (d || u))
						{
							u = skip(w, ':', '?', 0, 1, 0, 0, version);
							if (f)
								sfprintf(sp_info, " %s; -\b%c\b %s --\bno%-.*s\b.", T(NiL, ID, "On by default"), f, T(NiL, ID, "means"), u - w, w);
							else
								sfprintf(sp_info, " %s %s\bno%-.*s\b %s.", T(NiL, ID, "On by default; use"), "--"+2-prefix, u - w, w, T(NiL, ID, "to turn off"));
							if (!(t = sfstruse(sp_info)))
								goto nospace;
							textout(sp_body, t, 0, 0, style, 0, 0, sp_info, version, NiL, NiL, &bflags);
						}
						if (*p == GO)
						{
							p = u ? skip(p + 1, 0, 0, 0, 0, 1, 1, version) : textout(sp_body, p, 0, 0, style, 4, 0, sp_info, version, id, catalog, &bflags);
							y = "+?";
						}
						else
							y = " ";
						if (a & OPT_optional)
						{
							if (ov)
							{
								sfprintf(sp_info, "%s%s \b", y, T(NiL, ID, "If the option value is omitted then"));
								t = ov + ol;
								while (ov < t)
								{
									if (((c = *ov++) == ':' || c == '?') && *ov == c)
										ov++;
									sfputc(sp_info, c);
								}
								sfprintf(sp_info, "\b %s.", T(NiL, ID, "is assumed"));
							}
							else
								sfprintf(sp_info, "%s%s", y, T(NiL, ID, "The option value may be omitted."));
							if (!(t = sfstruse(sp_info)))
								goto nospace;
							textout(sp_body, t, 0, 0, style, 4, 0, sp_info, version, NiL, NiL, &bflags);
							y = " ";
						}
						if (v)
						{
							sfprintf(sp_info, "%s%s \b", y, T(NiL, ID, "The default value is"));
							t = v + vl;
							while (v < t)
							{
								if (((c = *v++) == ':' || c == '?') && *v == c)
									v++;
								sfputc(sp_info, c);
							}
							sfputc(sp_info, '\b');
							sfputc(sp_info, '.');
							if (!(t = sfstruse(sp_info)))
								goto nospace;
							textout(sp_body, t, 0, 0, style, 4, 0, sp_info, version, NiL, NiL, &bflags);
						}
					}
					else if (!mutex)
						sfputc(sp_body, ']');
				}
				if (*p == GO)
				{
					if (style >= STYLE_match)
						p = textout(sp_body, p, 0, 0, style, 4, 0, sp_info, version, id, catalog, &bflags);
					else
						p = skip(p + 1, 0, 0, 0, 0, 1, 1, version);
				}
			}
			else if (*p == GO)
				p = skip(p + 1, 0, 0, 0, 0, 1, 1, version);
		}
		psp = pop(psp);
		if (sp_misc)
		{
			if (!(p = sfstruse(sp_misc)))
				goto nospace;
			for (t = p; *t == '\t' || *t == '\n'; t++);
			if (*t)
			{
				item(sp_body, C("IMPLEMENTATION"), 0, 0, style, sp_info, version, id, ID, &bflags);
				sfputr(sp_body, p, -1);
			}
		}
	}
	if (oopts != o->oopts && oopts == top.oopts)
		state.pass[0] = top;
	version = o->version;
	id = o->id;
	catalog = o->catalog;
	if (style >= STYLE_keys)
	{
		if (sp_info)
			sfclose(sp_info);
		if (style == STYLE_keys && sfstrtell(mp) > 1)
			sfstrseek(mp, -1, SEEK_CUR);
		if (!(p = sfstruse(mp)))
			goto nospace;
		return opt_info.msg = p;
	}
	sp = sp_text;
	if (sfstrtell(sp) && style != STYLE_posix)
		sfputc(sp, ']');
	if (style == STYLE_nroff)
	{
		char	rd[64];
		char	ud[64];

		s = o->id;
		t = ud;
		while (t < &ud[sizeof(ud)-2] && (c = *s++))
		{
			if (islower(c))
				c = toupper(c);
			*t++ = c;
		}
		*t = 0;
		t = rd;
		if (s = o->release)
		{
			*t++ = ' ';
			while (t < &rd[sizeof(rd)-2] && (c = *s++) && c != ']')
				*t++ = c;
		}
		*t = 0;
		sfprintf(sp, "\
.\\\" format with nroff|troff|groff -man\n\
.TH %s %s%s\n\
.fp 5 CW\n\
.nr mH 5\n\
.de H0\n\
.nr mH 0\n\
.in 5n\n\
\\fB\\\\$1\\fP\n\
.in 7n\n\
..\n\
.de H1\n\
.nr mH 1\n\
.in 7n\n\
\\fB\\\\$1\\fP\n\
.in 9n\n\
..\n\
.de H2\n\
.nr mH 2\n\
.in 11n\n\
\\fB\\\\$1\\fP\n\
.in 13n\n\
..\n\
.de H3\n\
.nr mH 3\n\
.in 15n\n\
\\fB\\\\$1\\fP\n\
.in 17n\n\
..\n\
.de H4\n\
.nr mH 4\n\
.in 19n\n\
\\fB\\\\$1\\fP\n\
.in 21n\n\
..\n\
.de OP\n\
.nr mH 0\n\
.ie !'\\\\$1'-' \\{\n\
.ds mO \\\\fB\\\\-\\\\$1\\\\fP\n\
.ds mS ,\\\\0\n\
.\\}\n\
.el \\{\n\
.ds mO \\\\&\n\
.ds mS \\\\&\n\
.\\}\n\
.ie '\\\\$2'-' \\{\n\
.if !'\\\\$4'-' .as mO \\\\0\\\\fI\\\\$4\\\\fP\n\
.\\}\n\
.el \\{\n\
.as mO \\\\*(mS\\\\fB%s\\\\$2\\\\fP\n\
.if !'\\\\$4'-' .as mO =\\\\fI\\\\$4\\\\fP\n\
.\\}\n\
.in 5n\n\
\\\\*(mO\n\
.in 9n\n\
..\n\
.de SP\n\
.if \\\\n(mH==2 .in 9n\n\
.if \\\\n(mH==3 .in 13n\n\
.if \\\\n(mH==4 .in 17n\n\
..\n\
.de FN\n\
.nr mH 0\n\
.in 5n\n\
\\\\$1 \\\\$2\n\
.in 9n\n\
..\n\
.de DS\n\
.in +3n\n\
.ft 5\n\
.nf\n\
..\n\
.de DE\n\
.fi\n\
.ft R\n\
.in -3n\n\
..\n\
"
, ud
, section
, rd
, o->prefix == 2 ? "\\\\-\\\\-" : o->prefix == 1 ? "\\\\-" : ""
);
	}
	if (style == STYLE_match)
	{
		if (!matched)
		{
			if (hp = (Help_t*)search(styles, elementsof(styles), sizeof(styles[0]), (char*)what))
			{
				if (!sp_help && !(sp_help = sfstropen()))
					goto nospace;
				sfprintf(sp_help, "[-][:%s?%s]", hp->match, hp->text);
				if (!(opts = sfstruse(sp_help)))
					goto nospace;
				goto again;
			}
			s = (char*)unknown;
			goto nope;
		}
		else if (matched < 0)
			x = 0;
	}
	if (sp_plus)
	{
		if (sfstrtell(sp_plus))
		{
			if (sfstrtell(sp))
				sfputc(sp, ' ');
			if (!(t = sfstruse(sp_plus)))
				goto nospace;
			sfputr(sp, t, ']');
		}
		sfclose(sp_plus);
	}
	if (style >= STYLE_man)
	{
		if (sp_head)
		{
			if (!(t = sfstruse(sp_head)))
				goto nospace;
			for (; *t == '\n'; t++);
			sfputr(sp, t, '\n');
			sfclose(sp_head);
			sp_head = 0;
		}
		if (x)
			item(sp, C("SYNOPSIS"), 0, 0, style, sp_info, version, id, ID, &hflags);
	}
	if (x)
	{
		for (t = x + xl; t > x && (*(t - 1) == '\n' || *(t - 1) == '\r'); t--);
		xl = t - x;
		if (style >= STYLE_match)
		{
			u = id;
			if (o->flags & OPT_functions)
				t = 0;
			else if (t = strchr(u, ':'))
			{
				if ((o->flags & OPT_module) && *(t + 1) == ':' && *(t + 2))
				{
					u = t + 2;
					t = 0;
				}
				else
					*t = 0;
			}
			args(sp, x, xl, o->flags, style, sp_info, version, u, catalog);
			if (t)
				*t = ':';
			x = 0;
		}
	}
	if (sp_body)
	{
		if (sfstrtell(sp_body))
		{
			if (style < STYLE_match && sfstrtell(sp))
				sfputc(sp, ' ');
			if (!(t = sfstruse(sp_body)))
				goto nospace;
			if (style == STYLE_html && !(dflags & HELP_head) && (bflags & HELP_head))
				sfputr(sp, "\n</DIV>", '\n');
			sfputr(sp, t, -1);
		}
		sfclose(sp_body);
		sp_body = 0;
	}
	if (x && style != STYLE_posix)
		args(sp, x, xl, flags, style, sp_info, version, id, catalog);
	if (sp_info)
	{
		sfclose(sp_info);
		sp_info = 0;
	}
	if (sp_misc)
	{
		sfclose(sp_misc);
		sp_misc = 0;
	}
	if (!(p = sfstruse(sp)))
		goto nospace;
	astwinsize(1, NiL, &state.width);
	if (state.width < 20)
		state.width = OPT_WIDTH;
	m = strlen((style <= STYLE_long && error_info.id && !strchr(error_info.id, '/')) ? error_info.id : id) + 1;
	margin = style == STYLE_api ? (8 * 1024) : (state.width - 1);
	if (!(state.flags & OPT_preformat))
	{
		if (style >= STYLE_man || matched < 0)
		{
			sfputc(mp, '\f');
			ts = 0;
		}
		else
			ts = OPT_USAGE + m;
		if (style == STYLE_html)
		{
			char	ud[64];

			s = id;
			t = ud;
			while (t < &ud[sizeof(ud)-2] && (c = *s++))
			{
				if (islower(c))
					c = toupper(c);
				*t++ = c;
			}
			*t = 0;
			sfprintf(mp, "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">\n<HTML>\n<HEAD>\n<META name=\"generator\" content=\"optget (AT&T Research) 2011-11-11\">\n%s<TITLE>%s man document</TITLE>\n<STYLE type=\"text/css\">\ndiv.SH { padding-left:2em; text-indent:0em; }\ndiv.SY { padding-left:4em; text-indent:-2em; }\ndt { float:left; clear:both; }\ndd { margin-left:3em; }\n</STYLE>\n</HEAD>\n<BODY bgcolor=white>\n", (state.flags & OPT_proprietary) ? "<!--INTERNAL-->\n" : "", id);
			sfprintf(mp, "<H4><TABLE width=100%%><TR><TH align=left>%s&nbsp;(&nbsp;%s&nbsp;)&nbsp;<TH align=center><A href=\".\" title=\"Index\">%s</A><TH align=right>%s&nbsp;(&nbsp;%s&nbsp;)</TR></TABLE></H4>\n<HR>\n", ud, section, T(NiL, ID, secname(section)), ud, section);
			co = 2;
			pt = ptstk;
			pt->level = 0;
			pt->id = TAG_DIV;
		}
		else
			co = 0;
		if ((rm = margin - ts) < OPT_MARGIN)
			rm = OPT_MARGIN;
		ip = indent;
		ip->stop = (ip+1)->stop = style >= STYLE_html ? 0 : 2;
		tp = 0;
		n = 0;
		head = 1;
		while (*p == '\n')
			p++;
		while (c = *p++)
		{
			if (c == '\n')
			{
				ip = indent;
				n = 0;
				tp = 0;
				sfputc(mp, '\n');
				co = 0;
				rm = margin;
				ts = ip->stop;
				if (*p == '\n')
				{
					while (*++p == '\n');
					if ((style == STYLE_man || style == STYLE_html) && (!head || *p != ' ' && *p != '\t'))
					{
						if (style == STYLE_man)
							p--;
						else
							sfprintf(mp, "<P>\n");
					}
				}
				head = *p != ' ' && *p != '\t';
				if (style == STYLE_html && (*p != '<' || !strneq(p, "<BR>", 4) && !strneq(p, "<P>", 3)))
				{
					y = p;
					while (*p == '\t')
						p++;
					if (*p == '\n')
						continue;
					j = p - y;
					if (j > pt->level)
					{
						pt++;
						pt->level = j;
						pt->id = TAG_NONE;
						for (y = p; *y && *y != '\n'; y++)
							if (*y == '\t')
							{
								pt->id = TAG_DL;
								sfprintf(mp, "<DL>\n");
								break;
							}
					}
					else
						while (j < pt->level && pt > ptstk)
						{
							sfprintf(mp, "%s", end[pt->id]);
							pt--;
						}
					if (pt->id == TAG_DL)
					{
						dt = p;
						sfprintf(mp, "<DT>");
					}
					else
						dt = 0;
				}
			}
			else if (c == '\t')
			{
				if (style == STYLE_html)
				{
					while (*p == '\t')
						p++;
					if (*p != '\n')
					{
						co += sfprintf(mp, "<DD>");
						if (dt)
						{
							c = 0;
							m = 0;
							for (;;)
							{
								switch (*dt++)
								{
								case '\t':
									break;
								case '<':
									c = '>';
									continue;
								case '>':
									if (c == '>')
										c = 0;
									else
										m++;
									continue;
								case '&':
									c = ';';
									continue;
								case ';':
									if (c == ';')
										c = 0;
									m++;
									continue;
								default:
									if (!c)
										m++;
									continue;
								}
								break;
							}
							if (m >= 5)
								co += sfprintf(mp, "<BR>");
						}
					}
				}
				else
				{
					if ((ip+1)->stop)
					{
						do
						{
							ip++;
							if (*p != '\t')
								break;
							p++;
						} while ((ip+1)->stop);
						if (*p == '\n')
							continue;
						ts = ip->stop;
						if (co >= ts)
						{
							sfputc(mp, '\n');
							co = 0;
							rm = margin;
							ts = ip->stop;
						}
					}
					while (co < ts)
					{
						sfputc(mp, ' ');
						co++;
					}
				}
			}
			else
			{
				if (c == ' ' && !n)
				{
					if (co >= rm)
						tp = 0;
					else
					{
						tp = sfstrtell(mp);
						pp = p;
					}
					if (style == STYLE_nroff && !co)
						continue;
				}
				else if (style == STYLE_html)
				{
					if (c == '<')
					{
						if (strneq(p, "NOBR>", 5))
							n++;
						else if (n && strneq(p, "/NOBR>", 6) && !--n)
						{
							for (y = p += 6; (c = *p) && c != ' ' && c != '\t' && c != '\n' && c != '<'; p++)
								if (c == '[')
									sfputr(mp, "&#0091;", -1);
								else if (c == ']')
									sfputr(mp, "&#0093;", -1);
								else
									sfputc(mp, c);
							sfwrite(mp, "</NOBR", 6);
							c = '>';
							co += p - y + 6;
						}
					}
					else if (c == '>' && !n)
					{
						for (y = --p; (c = *p) && c != ' ' && c != '\t' && c != '\n' && c != '<'; p++)
							if (c == '[')
								sfputr(mp, "&#0091;", -1);
							else if (c == ']')
								sfputr(mp, "&#0093;", -1);
							else
								sfputc(mp, c);
						c = *sfstrseek(mp, -1, SEEK_CUR);
						if (p > y + 1)
						{
							tp = 0;
							co += p - y - 1;
						}
						if (co >= rm)
							tp = 0;
						else
						{
							tp = sfstrtell(mp);
							pp = p;
						}
					}
					else if (c == '[')
					{
						sfputr(mp, "&#0091", -1);
						c = ';';
					}
					else if (c == ']')
					{
						sfputr(mp, "&#0093", -1);
						c = ';';
					}
					else if (c == 'h')
					{
						y = p;
						if (*y++ == 't' && *y++ == 't' && *y++ == 'p' && (*y == ':' || *y++ == 's' && *y == ':') && *y++ == ':' && *y++ == '/' && *y++ == '/')
						{
							while (isalnum(*y) || *y == '_' || *y == '/' || *y == '-' || *y == '.')
								y++;
							if (*y == '?')
								while (isalnum(*y) || *y == '_' || *y == '/' || *y == '-' || *y == '.' || *y == '?' || *y == '=' || *y == '%' || *y == '&' || *y == ';' || *y == '#')
									y++;
							if (*(y - 1) == '.')
								y--;
							p--;
							sfprintf(mp, "<A href=\"%-.*s\">%-.*s</A", y - p, p, y - p, p);
							p = y;
							c = '>';
						}
					}
					else if (c == 'C')
					{
						y = p;
						if (*y++ == 'o' && *y++ == 'p' && *y++ == 'y' && *y++ == 'r' && *y++ == 'i' && *y++ == 'g' && *y++ == 'h' && *y++ == 't' && *y++ == ' ' && *y++ == '(' && (*y++ == 'c' || *(y - 1) == 'C') && *y++ == ')')
						{
							sfputr(mp, "Copyright &copy", -1);
							p = y;
							c = ';';
						}
					}
				}
				else if (c == ']')
				{
					if (n)
						n--;
				}
				else if (c == '[')
					n++;
				if (c == CC_esc)
				{
					sfputc(mp, c);
					do
					{
						if (!(c = *p++))
						{
							p--;
							break;
						}
						sfputc(mp, c);
					} while (c < 'a' || c > 'z');
				}
				else if (co++ >= rm && !n)
				{
					if (tp)
					{
						if (*sfstrseek(mp, tp, SEEK_SET) != ' ')
							sfstrseek(mp, 1, SEEK_CUR);
						tp = 0;
						p = pp;
						n = 0;
					}
					else if (c != ' ' && c != '\n')
						sfputc(mp, c);
					if (*p == ' ')
						p++;
					if (*p != '\n')
					{
						sfputc(mp, '\n');
						for (co = 0; co < ts; co++)
							sfputc(mp, ' ');
						rm = margin;
					}
				}
				else
					sfputc(mp, c);
			}
		}
		for (d = sfstrbase(mp), t = sfstrseek(mp, 0, SEEK_CUR); t > d && ((c = *(t - 1)) == '\n' || c == '\r' || c == ' ' || c == '\t'); t--);
		sfstrseek(mp, t - d, SEEK_SET);
		if (style == STYLE_html)
		{
			sfprintf(mp, "\n");
			while (pt > ptstk)
			{
				sfprintf(mp, "%s", end[pt->id]);
				pt--;
			}
			sfprintf(mp, "</DIV>\n</BODY>\n</HTML>");
		}
	}
	else
		sfputr(mp, p, 0);
	if (!(p = sfstruse(mp)))
		goto nospace;
	if (sp)
		sfclose(sp);
	return opt_info.msg = p;
 nospace:
	s = T(NiL, ID, "[* out of space *]");
 nope:
	if (psp)
		pop(psp);
	if (sp_help)
		sfclose(sp_help);
	if (sp_text)
		sfclose(sp_text);
	if (sp_plus)
		sfclose(sp_plus);
	if (sp_info)
		sfclose(sp_info);
	if (sp_head)
		sfclose(sp_head);
	if (sp_body)
		sfclose(sp_body);
	if (sp_misc)
		sfclose(sp_misc);
	return s;
}

/*
 * compatibility wrapper to opthelp()
 */

char*
optusage(const char* opts)
{
	return opthelp(opts, NiL);
}

/*
 * convert number using strtonll() *except* that
 * 0*[[:digit:]].* is treated as [[:digit:]].*
 * i.e., it looks octal but isn't, to meet
 * POSIX Utility Argument Syntax -- use
 * 0x.* or <base>#* for alternate bases
 */

static intmax_t     
optnumber(const char* s, char** t, int* e)
{
	intmax_t	n;
	int		oerrno;

	while (*s == '0' && isdigit(*(s + 1)))
		s++;
	oerrno = errno;
	errno = 0;
	n = strtonll(s, t, NiL, 0);
	if (e)
		*e = errno;
	errno = oerrno;
	return n;
}

/*
 * point opt_info.arg to an error/info message for opt_info.name
 * p points to opts location for opt_info.name
 * optget() return value is returned
 */

static int
opterror(register char* p, int err, int version, char* id, char* catalog)
{
	register Sfio_t*	mp;
	register Sfio_t*	tp;
	register char*		s;
	register int		c;

	if (opt_info.num != LONG_MIN)
		opt_info.num = (long)(opt_info.number = 0);
	if (!p || !(mp = state.mp) && !(mp = state.mp = sfstropen()))
		goto nospace;
	s = *p == '-' ? p : opt_info.name;
	if (*p == '!')
	{
		while (*s == '-')
			sfputc(mp, *s++);
		sfputc(mp, 'n');
		sfputc(mp, 'o');
	}
	sfputr(mp, s, ':');
	sfputc(mp, ' ');
	if (*p == '#' || *p == ':')
	{
		if (*p == '#')
		{
			s = T(NiL, ID, "numeric");
			sfputr(mp, s, ' ');
		}
		if (*(p = next(p + 1, version)) == '[')
		{
			p = skip(s = p + 1, ':', '?', 0, 1, 0, 0, version);
			tp = X(catalog) ? state.xp : mp;
			while (s < p)
			{
				if ((c = *s++) == '?' || c == ']')
					s++;
				sfputc(tp, c);
			}
			if (!X(catalog))
				sfputc(mp, ' ');
			else if (p = sfstruse(tp))
				sfputr(mp, T(id, catalog, p), ' ');
			else
				goto nospace;
		}
		p = opt_info.name[2] ? C("value expected") : C("argument expected");
	}
	else if (*p == '*' || *p == '&')
	{
		sfputr(mp, opt_info.arg, ':');
		sfputc(mp, ' ');
		p = *p == '&' ? C("ambiguous option argument value") : C("unknown option argument value");
	}
	else if (*p == '=' || *p == '!')
		p = C("value not expected");
	else if (*p == '?')
		p = *(p + 1) == '?' ? C("optget: option not supported") : C("ambiguous option");
	else if (*p == '+')
		p = C("section not found");
	else
	{
		if (opt_info.option[0] != '?' && opt_info.option[0] != '-' || opt_info.option[1] != '?' && opt_info.option[1] != '-')
			opt_info.option[0] = 0;
		p = C("unknown option");
	}
	p = T(NiL, ID, p);
	sfputr(mp, p, -1);
	if (err)
		sfputr(mp, " -- out of range", -1);
	if (opt_info.arg = sfstruse(mp))
		return ':';
 nospace:
	opt_info.arg = T(NiL, ID, "[* out of space *]");
	return ':';
}

/*
 * argv:	command line argv where argv[0] is command name
 *
 * opts:	option control string
 *
 *	'[' [flag][=][index][:<long-name>[|<alias-name>...]['?'description]] ']'
 *			long option name, index, description; -index returned
 *	':'		option takes string arg
 *	'#'		option takes numeric arg (concat option may follow)
 *	'?'		(option) following options not in usage
 *			(following # or :) optional arg
 *	'[' '[' ... ] ... '[' ... ']' ']'
 *			mutually exclusive option grouping
 *	'[' name [:attr]* [?description] ']'
 *			(following # or :) optional option arg description
 *	'\n'[' '|'\t']*	ignored for legibility
 *	' ' ...		optional argument(s) description (to end of string)
 *			or after blank line
 *	']]'		literal ']' within '[' ... ']'
 *
 * return:
 *	0		no more options
 *	'?'		usage: opt_info.arg points to message sans
 *			`Usage: command '
 *	':'		error: opt_info.arg points to message sans `command: '
 *
 * ':'  '#'  ' '  '['  ']'
 *			invalid option chars
 *
 * -- terminates option list and returns 0
 *
 * + as first opts char makes + equivalent to -
 *
 * if any # option is specified then numeric options (e.g., -123)
 * are associated with the leftmost # option in opts
 *
 * usage info in placed opt_info.arg when '?' returned
 * see help_text[] (--???) for more info
 */

int
optget(register char** argv, const char* oopts)
{
	register int	c;
	register char*	s;
	char*		a;
	char*		b;
	char*		e;
	char*		f;
	char*		g;
	char*		v;
	char*		w;
	char*		p;
	char*		q;
	char*		t;
	char*		y;
	char*		numopt;
	char*		opts;
	char*		id;
	char*		catalog;
	int		n;
	int		m;
	int		k;
	int		j;
	int		x;
	int		err;
	int		no;
	int		nov;
	int		num;
	int		numchr;
	int		prefix;
	int		version;
	Help_t*		hp;
	Push_t*		psp;
	Push_t*		tsp;
	Sfio_t*		vp;
	Sfio_t*		xp;
	Optcache_t*	cache;
	Optcache_t*	pcache;
	Optpass_t*	pass;

#if !_PACKAGE_astsa && !_YOU_FIGURED_OUT_HOW_TO_GET_ALL_DLLS_TO_DO_THIS_
	/*
	 * these are not initialized by all dlls!
	 */

	extern Error_info_t	_error_info_;
	extern Opt_t		_opt_info_;

	if (!_error_infop_)
		_error_infop_ = &_error_info_;
	if (!_opt_infop_)
		_opt_infop_ = &_opt_info_;
#endif
	if (!oopts)
		return 0;
	state.pindex = opt_info.index;
	state.poffset = opt_info.offset;
	if (!opt_info.index)
	{
		opt_info.index = 1;
		opt_info.offset = 0;
		if (state.npass)
		{
			state.npass = 0;
			state.join = 0;
		}
	}
	if (!argv)
		cache = 0;
	else
		for (pcache = 0, cache = state.cache; cache; pcache = cache, cache = cache->next)
			if (cache->pass.oopts == (char*)oopts)
				break;
	if (cache)
	{
		if (pcache)
		{
			pcache->next = cache->next;
			cache->next = state.cache;
			state.cache = cache;
		}
		pass = &cache->pass;
		state.npass = -1;
	}
	else
	{
		if (!argv)
			n = state.npass ? state.npass : 1;
		else if ((n = state.join - 1) < 0)
			n = 0;
		if (n >= state.npass || state.pass[n].oopts != (char*)oopts)
		{
			for (m = 0; m < state.npass && state.pass[m].oopts != (char*)oopts; m++);
			if (m < state.npass)
				n = m;
			else
			{
				if (n >= elementsof(state.pass))
					n = elementsof(state.pass) - 1;
				init((char*)oopts, &state.pass[n]);
				if (state.npass <= n)
					state.npass = n + 1;
			}
		}
		if (!argv)
			return 0;
		pass = &state.pass[n];
	}
	opts = pass->opts;
	prefix = pass->prefix;
	version = pass->version;
	id = pass->id;
	if (!(xp = state.xp) || (catalog = pass->catalog) && !X(catalog))
		catalog = 0;
	else /* if (!error_info.catalog) */
		error_info.catalog = catalog;
 again:
	psp = 0;

	/*
	 * check if any options remain and determine if the
	 * next option is short or long
	 */

	opt_info.assignment = 0;
	nov = no = num = 1;
	e = w = v = 0;
	n = x = 0;
	for (;;)
	{
		if (!opt_info.offset)
		{
			/*
			 * finished with the previous arg
			 */

			if (opt_info.index == 1 && opt_info.argv != state.strv)
			{
				opt_info.argv = 0;
				state.argv[0] = 0;
				if (argv[0] && (state.argv[0] = save(argv[0], strlen(argv[0]), 0, 0, 0, 0)))
					opt_info.argv = state.argv;
				state.style = STYLE_short;
			}
			if (!(s = argv[opt_info.index]))
				return 0;
			if (!prefix)
			{
				/*
				 * long with no prefix (dd style)
				 */

				n = 2;
				if ((c = *s) != '-' && c != '+')
					c = '-';
				else if (*++s == c)
				{
					if (!*++s)
					{
						opt_info.index++;
						return 0;
					}
					else if (*s == c)
						return 0;
				}
				else if (*s == '?')
					n = 1;
			}
			else if ((c = *s++) != '-' && (c != '+' || !(pass->flags & OPT_plus) && (!(pass->flags & OPT_numeric) || !isdigit(*s))))
			{
				if (!(pass->flags & OPT_old) || !isalpha(c))
					return 0;
				s--;
				n = 1;
				opt_info.offset--;
			}
			else if (*s == c)
			{
				if (!*++s)
				{
					/*
					 * -- or ++ end of options
					 */

					opt_info.index++;
					return 0;
				}
				else if (*s == c)
				{
					/*
					 * ---* or +++* are operands
					 */

					return 0;
				}
				if (version || *s == '?' || !(pass->flags & OPT_minus))
				{
					/*
					 * long with double prefix
					 */

					n = 2;
				}
				else
				{
					/*
					 * short option char '-'
					 */

					s--;
					n = 1;
				}
			}
			else if (prefix == 1 && *s != '?')
			{
				/*
				 * long with single prefix (find style)
				 */

				n = 2;
			}
			else
			{
				/*
				 * short (always with single prefix)
				 */

				n = 1;
			}

			/*
			 * just a prefix is an option (e.g., `-' == stdin)
			 */

			if (!*s)
				return 0;
			if (c == '+')
				opt_info.arg = 0;
			if (n == 2)
			{
				x = 0;
				state.style = STYLE_long;
				opt_info.option[0] = opt_info.name[0] = opt_info.name[1] = c;
				w = &opt_info.name[prefix];
				if ((*s == 'n' || *s == 'N') && (*(s + 1) == 'o' || *(s + 1) == 'O') && *(s + 2) && *(s + 2) != '=')
					no = *(s + 2) == '-' ? 3 : 2;
				else
					no = 0;
				for (c = *s; *s; s++)
				{
					if (*s == '=')
					{
						if (*(s + 1) == '=')
							s++;
						if (!isalnum(*(s - 1)) && *(w - 1) == (opt_info.assignment = *(s - 1)))
							w--;
						v = ++s;
						break;
					}
					if (w < &opt_info.name[elementsof(opt_info.name) - 1] && *s != ':' && *s != '|' && *s != '[' && *s != ']')
						*w++ = *s;
				}
				*w = 0;
				w = &opt_info.name[prefix];
				c = *w;
				opt_info.offset = 0;
				opt_info.index++;
				break;
			}
			opt_info.offset++;
		}
		if (!argv[opt_info.index])
			return 0;
		if (c = argv[opt_info.index][opt_info.offset++])
		{
			if ((k = argv[opt_info.index][0]) != '-' && k != '+')
				k = '-';
			opt_info.option[0] = opt_info.name[0] = k;
			opt_info.option[1] = opt_info.name[1] = c;
			opt_info.option[2] = opt_info.name[2] = 0;
			break;
		}
		opt_info.offset = 0;
		opt_info.index++;
	}

	/*
	 * at this point:
	 *
	 *	c	the first character of the option
	 *	w	long option name if != 0, otherwise short
	 *	v	long option value (via =) if w != 0
	 */

	if (c == '?')
	{
		/*
		 * ? always triggers internal help
		 */

		if (!state.msgdict)
			initdict();
		if (w)
		{
			if (!v && (*(w + 1) || !(v = argv[opt_info.index]) || !++opt_info.index))
				v = w + 1;
			else if (w[0] != '?' || w[1])
			{
				s = w;
				w = v;
				v = s + 1;
			}
		}
		opt_info.option[1] = c;
		opt_info.option[2] = 0;
		if (!w)
		{
			opt_info.name[1] = c;
			opt_info.name[2] = 0;
		}
		goto help;
	}
	else if (w && !state.msgdict)
		initdict();
	numopt = 0;
	f = 0;
	s = opts;

	/*
	 * no option can start with these characters
	 */

	if (c == ':' || c == '#' || c == ' ' || c == '[' || c == ']')
	{
		if (c != *s)
			s = "";
	}
	else
	{
		a = 0;
		if (!w && (pass->flags & OPT_cache))
		{
			if (cache)
			{
				if (k = cache->flags[map[c]])
				{
					opt_info.arg = 0;

					/*
					 * this is a ksh getopts workaround
					 */

					if (opt_info.num != LONG_MIN)
						opt_info.num = (long)(opt_info.number = !(k & OPT_cache_invert));
					if (!(k & (OPT_cache_string|OPT_cache_numeric)))
						return c;
					if (*(opt_info.arg = &argv[opt_info.index++][opt_info.offset]))
					{
						if (!(k & OPT_cache_numeric))
						{
							opt_info.offset = 0;
							return c;
						}
						opt_info.num = (long)(opt_info.number = optnumber(opt_info.arg, &e, &err));
						if (err || e == opt_info.arg)
						{
							opt_info.num = (long)(opt_info.number = 0);
							if (!err && (k & OPT_cache_optional))
							{
								opt_info.arg = 0;
								opt_info.index--;
								return c;
							}
						}
						else if (*e)
						{
							opt_info.offset += e - opt_info.arg;
							opt_info.index--;
							return c;
						}
						else
						{
							opt_info.offset = 0;
							return c;
						}
					}
					else if (opt_info.arg = argv[opt_info.index])
					{
						opt_info.index++;
						if ((k & OPT_cache_optional) && (*opt_info.arg == '-' || (pass->flags & OPT_plus) && *opt_info.arg == '+') && *(opt_info.arg + 1))
						{
							opt_info.arg = 0;
							opt_info.index--;
							opt_info.offset = 0;
							opt_info.num = (long)(opt_info.number = 0);
							return c;
						}
						if (k & OPT_cache_string)
						{
							opt_info.offset = 0;
							return c;
						}
						opt_info.num = (long)(opt_info.number = optnumber(opt_info.arg, &e, &err));
						if (!err)
						{
							if (!*e)
							{
								opt_info.offset = 0;
								return c;
							}
							if (k & OPT_cache_optional)
							{
								opt_info.arg = 0;
								opt_info.index--;
								opt_info.offset = 0;
								return c;
							}
						}
					}
					else if (k & OPT_cache_optional)
					{
						opt_info.offset = 0;
						return c;
					}
					opt_info.index--;
				}
				cache = 0;
			}
			else if (cache = newof(0, Optcache_t, 1, 0))
			{
				cache->caching = c;
				c = 0;
				cache->pass = *pass;
				cache->next = state.cache;
				state.cache = cache;
			}
		}
		else
			cache = 0;
		for (;;)
		{
			if (!(*(s = next(s, version))) || *s == '\n' || *s == ' ')
			{
				if (!(tsp = psp))
				{
					if (cache)
					{
						/*
						 * the first loop pass
						 * initialized the cache
						 * so one more pass to
						 * check the cache or
						 * bail for a full scan
						 */

						cache->flags[0] = 0;
						c = cache->caching;
						cache->caching = 0;
						cache = 0;
						s = opts;
						continue;
					}
					if (!x && catalog)
					{
						/*
						 * the first loop pass
						 * translated long
						 * options and there
						 * were no matches so
						 * one more pass for C
						 * locale
						 */

						catalog = 0;
						s = opts;
						continue;
					}
					s = "";
					break;
				}
				s = psp->ob;
				psp = psp->next;
				free(tsp);
				continue;
			}
			if (*s == '\f')
			{
				psp = info(psp, s + 1, NiL, xp, id);
				if (psp->nb)
					s = psp->nb;
				else
				{
					s = psp->ob;
					psp = psp->next;
				}
				continue;
			}
			message((-20, "optget: opt %s  c %c  w %s  num %ld", show(s), c, w, num));
			if (*s == c && !w)
				break;
			else if (*s == '[')
			{
				s = next(s + 1, version);
				if (*s == '(')
				{
					s = nest(f = s);
					if (!conformance(f, s - f))
						goto disable;
				}
				k = *(f = s);
				if (k == '+' || k == '-')
					/* ignore */;
				else if (k == '[' || version < 1)
					continue;
				else if (w && !cache)
				{
					nov = no;
					if (*(s + 1) == '\f' && (vp = state.vp))
					{
						sfputc(vp, k);
						s = expand(s + 2, NiL, &t, vp, id);
						if (*s)
							*(f = s - 1) = k;
						else
						{
							f = sfstrbase(vp);
							if (s = strrchr(f, ':'))
								f = s - 1;
							else
								s = f + 1;
						}
					}
					else
						t = 0;
					if (*s != ':')
						s = skip(s, ':', '?', 0, 1, 0, 0, version);
					if (*s == ':')
					{
						if (catalog)
						{
							p = skip(s + 1, '?', 0, 0, 1, 0, 0, version);
							e = sfprints("%-.*s", p - (s + 1), s + 1);
							g = T(id, catalog, e);
							if (g == e)
								p = 0;
							else
							{
								sfprintf(xp, ":%s|%s?", g, e);
								if (!(s = sfstruse(xp)))
									goto nospace;
							}
						}
						else
							p = 0;
						y = w;
						for (;;)
						{
							n = m = 0;
							e = s + 1;
							while (*++s)
							{
								if (*s == '*' || *s == '\a')
								{
									if (*s == '\a')
										do
										{
											if (!*++s)
											{
												s--;
												break;
											}
										} while (*s != '\a');
									j = *(s + 1);
									if (j == ':' || j == '|' || j == '?' || j == ']' || j == 0)
									{
										while (*w)
											w++;
										m = 0;
										break;
									}
									m = 1;
								}
								else if (*s == *w || SEP(*s) && SEP(*w))
									w++;
								else if (*w == 0)
									break;
								else if (!SEP(*s))
								{
									if (SEP(*w))
									{
										if (*++w == *s)
										{
											w++;
											continue;
										}
									}
									else if (w == y || SEP(*(w - 1)) || isupper(*(w - 1)) && islower(*w))
										break;
									for (q = s; *q && !SEP(*q) && *q != '|' && *q != '?' && *q != ']'; q++);
									if (!SEP(*q))
										break;
									for (s = q; w > y && *w != *(s + 1); w--);
								}
								else if (*w != *(s + 1))
									break;
							}
							if (!*w)
							{
								nov = 0;
								break;
							}
							if (n = no)
							{
								m = 0;
								s = e - 1;
								w = y + n;
								while (*++s)
								{
									if (*s == '*' || *s == '\a')
									{
										if (*s == '\a')
											do
											{
												if (!*++s)
												{
													s--;
													break;
												}
											} while (*s != '\a');
										j = *(s + 1);
										if (j == ':' || j == '|' || j == '?' || j == ']' || j == 0)
										{
											while (*w)
												w++;
											m = 0;
											break;
										}
										m = 1;
									}
									else if (*s == *w || SEP(*s) && SEP(*w))
										w++;
									else if (*w == 0)
										break;
									else if (!SEP(*s))
									{
										if (SEP(*w))
										{
											if (*++w == *s)
											{
												w++;
												continue;
											}
										}
										else if (w == y || SEP(*(w - 1)) || isupper(*(w - 1)) && islower(*w))
											break;
										for (q = s; *q && !SEP(*q) && *q != '|' && *q != '?' && *q != ']'; q++);
										if (!SEP(*q))
											break;
										for (s = q; w > y && *w != *(s + 1); w--);
									}
									else if (*w != *(s + 1))
										break;
								}
								if (!*w)
									break;
							}
							if (*(s = skip(s, ':', '|', '?', 1, 0, 0, version)) != '|')
								break;
							w = y;
						}
						if (p)
							s = p;
						if (!*w)
						{
							if (n)
								num = 0;
							if (!(n = (m || *s == ':' || *s == '|' || *s == '?' || *s == ']' || *s == 0)) && x)
							{
								psp = pop(psp);
								return opterror("?", 0, version, id, catalog);
							}
							for (x = k; *(f + 1) == '|' && (j = *(f + 2)) && j != '!' && j != '=' && j != ':' && j != '?' && j != ']'; f += 2);
							if (*f == ':')
							{
								x = -1;
								opt_info.option[1] = '-';
								opt_info.option[2] = 0;
							}
							else if (*(f + 1) == ':' || *(f + 1) == '!' && *(f + 2) == ':')
							{
								opt_info.option[1] = x;
								opt_info.option[2] = 0;
							}
							else
							{
								a = f;
								if (*a == '=')
									a++;
								else
								{
									if (*(a + 1) == '!')
										a++;
									if (*(a + 1) == '=')
										a += 2;
								}
								x = -strtol(a, &b, 0);
								if ((b - a) > sizeof(opt_info.option) - 2)
									b = a + sizeof(opt_info.option) - 2;
								memcpy(&opt_info.option[1], a, b - a);
								opt_info.option[b - a + 1] = 0;
							}
							b = e;
							if (t)
							{
								s = t;
								t = 0;
							}
							a = s = skip(s, 0, 0, 0, 1, 0, 0, version);
							if (n)
							{
								w = y;
								break;
							}
						}
						w = y;
					}
					else if (k == c && prefix == 1)
					{
						w = 0;
						opt_info.name[1] = c;
						opt_info.name[2] = 0;
						opt_info.offset = 2;
						opt_info.index--;
						break;
					}
					if (t)
					{
						s = t;
						if (a)
							a = t;
					}
				}
			disable:
				s = skip(s, 0, 0, 0, 1, 0, 1, version);
				if (*s == GO)
					s = skip(s + 1, 0, 0, 0, 0, 1, 1, version);
				if (cache)
				{
					m = OPT_cache_flag;
					v = s;
					if (*v == '#')
					{
						v++;
						m |= OPT_cache_numeric;
					}
					else if (*v == ':')
					{
						v++;
						m |= OPT_cache_string;
					}
					if (*v == '?')
					{
						v++;
						m |= OPT_cache_optional;
					}
					else if (*v == *(v - 1))
						v++;
					if (*(v = next(v, version)) == '[')
						v = skip(v + 1, 0, 0, 0, 1, 0, 1, version);
					if (*v != GO)
					{
						v = f;
						for (;;)
						{
							if (isdigit(*f) && isdigit(*(f + 1)))
								while (isdigit(*(f + 1)))
									f++;
							else if (*(f + 1) == '=')
								break;
							else
								cache->flags[map[*f]] = m;
							j = 0;
							while (*(f + 1) == '|')
							{
								f += 2;
								if (!(j = *f) || j == '!' || j == '=' || j == ':' || j == '?' || j == ']')
									break;
								cache->flags[map[j]] = m;
							}
							if (j != '!' || (m & OPT_cache_invert))
								break;
							f = v;
							m |= OPT_cache_invert;
						}
					}
				}
				else
				{
					m = 0;
					if (!w)
					{
						if (isdigit(*f) && isdigit(*(f + 1)))
							k = -1;
						if (c == k)
							m = 1;
						while (*(f + 1) == '|')
						{
							f += 2;
							if (!(j = *f))
							{
								m = 0;
								break;
							}
							else if (j == c)
								m = 1;
							else if (j == '!' || j == '=' || j == ':' || j == '?' || j == ']')
								break;
						}
					}
					if (m)
					{
						s--;
						if (*++f == '!')
						{
							f++;
							num = 0;
						}
						if (*f == '=')
						{
							c = -strtol(++f, &b, 0);
							if ((b - f) > sizeof(opt_info.option) - 2)
								b = f + sizeof(opt_info.option) - 2;
							memcpy(&opt_info.option[1], f, b - f);
							opt_info.option[b - f + 1] = 0;
						}
						else
							c = k;
						break;
					}
				}
				if (*s == '#')
				{
					if (!numopt && s > opts)
					{
						numopt = s - 1;
						numchr = k;
						if (*f == ':')
							numchr = -1;
						else if (*(f + 1) != ':' && *(f + 1) != '!' && *(f + 1) != ']')
						{
							a = f;
							if (*a == '=')
								a++;
							else
							{
								if (*(a + 1) == '!')
									a++;
								if (*(a + 1) == '=')
									a += 2;
							}
							numchr = -strtol(a, NiL, 0);
						}
					}
				}
				else if (*s != ':')
					continue;
			}
			else if (*s == ']')
			{
				s++;
				continue;
			}
			else if (*s == '#')
			{
				if (!numopt && s > opts)
					numchr = *(numopt = s - 1);
			}
			else if (*s != ':')
			{
				if (cache)
				{
					m = OPT_cache_flag;
					if (*(s + 1) == '#')
					{
						m |= OPT_cache_numeric;
						if (*(s + 2) == '?')
							m |= OPT_cache_optional;
					}
					else if (*(s + 1) == ':')
					{
						m |= OPT_cache_string;
						if (*(s + 2) == '?')
							m |= OPT_cache_optional;
					}
					cache->flags[map[*s]] = m;
				}
				s++;
				continue;
			}
			message((-21, "optget: opt %s", show(s)));
			if (*++s == '?' || *s == *(s - 1))
				s++;
			if (*(s = next(s, version)) == '[')
			{
				s = skip(s + 1, 0, 0, 0, 1, 0, 1, version);
				if (*s == GO)
					s = skip(s + 1, 0, 0, 0, 0, 1, 1, version);
			}
			message((-21, "optget: opt %s", show(s)));
		}
		if (w && x)
		{
			s = skip(b, '|', '?', 0, 1, 0, 0, version);
			if (v && (a == 0 || *a == 0 || *(a + 1) != ':' && *(a + 1) != '#') && (*v == '0' || *v == '1') && !*(v + 1))
			{
				if (*v == '0')
					num = !num;
				v = 0;
			}
			if ((s - b) >= elementsof(opt_info.name))
				s = b + elementsof(opt_info.name) - 1;
			for (;;)
			{
				if (b >= s)
				{
					*w = 0;
					break;
				}
				if (*b == '*')
					break;
				*w++ = *b++;
			}
			if (!num && v)
				return opterror(no ? "!" : "=", 0, version, id, catalog);
			w = &opt_info.name[prefix];
			c = x;
			s = a;
		}
	}
	if (!*s)
	{
		if (w)
		{
			if (hp = (Help_t*)search(styles, elementsof(styles), sizeof(styles[0]), w))
			{
				if (!v)
					v = (char*)hp->name;
				goto help;
			}
			if (!v)
			{
				v = opt_info.name;
				goto help;
			}
		}
		if (w || !isdigit(c) || !numopt || !(pass->flags & OPT_numeric))
		{
			pop(psp);
			return opterror("", 0, version, id, catalog);
		}
		s = numopt;
		c = opt_info.option[1] = numchr;
		opt_info.offset--;
	}
	opt_info.arg = 0;

	/*
	 * this is a ksh getopts workaround
	 */

	if (opt_info.num != LONG_MIN)
		opt_info.num = (long)(opt_info.number = num);
	if ((n = *++s == '#') || *s == ':' || w && !nov && v && (optnumber(v, &e, NiL), n = !*e))
	{
		if (w)
		{
			if (nov)
			{
				if (v)
				{
					pop(psp);
					return opterror("!", 0, version, id, catalog);
				}
				opt_info.num = (long)(opt_info.number = 0);
			}
			else
			{
				if (!v && *(s + 1) != '?' && (v = argv[opt_info.index]))
				{
					opt_info.index++;
					opt_info.offset = 0;
				}
				if (!(opt_info.arg = v) || (*v == '0' || *v == '1') && !*(v + 1))
				{
					if (*(s + 1) != '?')
					{
						if (!opt_info.arg)
						{
							pop(psp);
							return opterror(s, 0, version, id, catalog);
						}
					}
					else if (*(t = next(s + 2, version)) == '[')
						while (*(t = skip(t, ':', 0, 0, 1, 0, 0, version)) == ':')
							if (*++t == '!')
							{
								if (!v || *v == '1')
								{
									e = skip(t, ':', '?', ']', 1, 0, 0, version);
									opt_info.arg = sfprints("%-.*s", e - t - 1, t + 1);
								}
								else
								{
									opt_info.arg = 0;
									opt_info.num = (long)(opt_info.number = 0);
								}
								break;
							}
				}
				if (opt_info.arg && n)
				{
					opt_info.num = (long)(opt_info.number = optnumber(opt_info.arg, &e, &err));
					if (err || e == opt_info.arg)
					{
						pop(psp);
						return opterror(s, err, version, id, catalog);
					}
				}
			}
			goto optarg;
		}
		else if (*(opt_info.arg = &argv[opt_info.index++][opt_info.offset]))
		{
			if (*s == '#')
			{
				opt_info.num = (long)(opt_info.number = optnumber(opt_info.arg, &e, &err));
				if (err || e == opt_info.arg)
				{
					if (!err && *(s + 1) == '?')
					{
						opt_info.arg = 0;
						opt_info.index--;
					}
					else
					{
						opt_info.offset = 0;
						c = opterror(s, err, version, id, catalog);
					}
					pop(psp);
					return c;
				}
				else if (*e)
				{
					opt_info.offset += e - opt_info.arg;
					opt_info.index--;
					pop(psp);
					return c;
				}
			}
		}
		else if (opt_info.arg = argv[opt_info.index])
		{
			opt_info.index++;
			if (*(s + 1) == '?' && (*opt_info.arg == '-' || (pass->flags & OPT_plus) && *opt_info.arg == '+') && *(opt_info.arg + 1))
			{
				opt_info.num = (long)(opt_info.number = 0);
				opt_info.index--;
				opt_info.arg = 0;
			}
			else if (*s == '#')
			{
				opt_info.num = (long)(opt_info.number = optnumber(opt_info.arg, &e, &err));
				if (err || *e)
				{
					if (!err && *(s + 1) == '?')
					{
						opt_info.arg = 0;
						opt_info.index--;
					}
					else
					{
						pop(psp);
						opt_info.offset = 0;
						return opterror(s, err, version, id, catalog);
					}
				}
			}
		}
		else if (*(s + 1) != '?')
		{
			opt_info.index--;
			pop(psp);
			return opterror(s, 0, version, id, catalog);
		}
		opt_info.offset = 0;
	optarg:
		if (*s == ':' && *(s = skip(s, 0, 0, 0, 1, 0, 1, version)) == GO && *(s = next(s + 1, version)) == '[' && isalnum(*(s + 1)))
		{
			x = 0;
			if (opt_info.arg)
			{
				do
				{
					w = y = opt_info.arg;
					f = s = next(s + 1, version);
					k = *f;
					if (k == *w && isalpha(k) && !*(w + 1))
					{
						x = k;
						break;
					}
					if (*s == '+' || *s == '-')
						continue;
					else if (*s == '[' || version < 1)
						continue;
					else
					{
						if (*s != ':')
							s = skip(s, ':', '?', 0, 1, 0, 0, version);
						if (*s == ':')
						{
							if (catalog)
							{
								p = skip(s + 1, '?', 0, 0, 1, 0, 0, version);
								e = sfprints("%-.*s", p - (s + 1), s + 1);
								b = T(id, catalog, e);
								if (b == e)
									p = 0;
								else
								{
									sfprintf(xp, ":%s|%s?", b, e);
									if (!(s = sfstruse(xp)))
										goto nospace;
								}
							}
							else
								p = 0;
							for (;;)
							{
								n = m = 0;
								e = s + 1;
								while (*++s)
								{
									if (*s == '*' || *s == '\a')
									{
										if (*s == '\a')
											do
											{
												if (!*++s)
												{
													s--;
													break;
												}
											} while (*s != '\a');
										j = *(s + 1);
										if (j == ':' || j == '|' || j == '?' || j == ']' || j == 0)
										{
											while (*w)
												w++;
											m = 0;
											break;
										}
										m = 1;
									}
									else if (*s == *w || SEP(*s) && SEP(*w))
										w++;
									else if (*w == 0)
										break;
									else if (!SEP(*s))
									{
										if (SEP(*w))
										{
											if (*++w == *s)
											{
												w++;
												continue;
											}
										}
										else if (w == y || SEP(*(w - 1)) || isupper(*(w - 1)) && islower(*w))
											break;
										for (q = s; *q && !SEP(*q) && *q != '|' && *q != '?' && *q != ']'; q++);
										if (!SEP(*q))
											break;
										for (s = q; w > y && *w != *(s + 1); w--);
									}
									else if (*w != *(s + 1))
										break;
								}
								if (!*w)
								{
									nov = 0;
									break;
								}
								if (*(s = skip(s, ':', '|', '?', 1, 0, 0, version)) != '|')
									break;
								w = y;
							}
							if (p)
								s = p;
							if (!*w)
							{
								if (n)
									num = 0;
								if (!(n = (m || *s == ':' || *s == '|' || *s == '?' || *s == ']')) && x)
								{
									pop(psp);
									return opterror("&", 0, version, id, catalog);
								}
								for (x = k; *(f + 1) == '|' && (j = *(f + 2)) && j != '!' && j != '=' && j != ':' && j != '?' && j != ']'; f += 2);
								if (*f == ':')
									x = -1;
								else if (*(f + 1) == ':' || *(f + 1) == '!' && *(f + 2) == ':')
									/* ok */;
								else
								{
									a = f;
									if (*a == '=')
										a++;
									else
									{
										if (*(a + 1) == '!')
											a++;
										if (*(a + 1) == '=')
											a += 2;
									}
									x = -strtol(a, &b, 0);
								}
								b = e;
								a = s = skip(s, 0, 0, 0, 1, 0, 0, version);
								if (n)
									break;
							}
						}
					}
				} while (*(s = skip(s, 0, 0, 0, 1, 0, 1, version)) == '[');
				if (!(opt_info.num = (long)(opt_info.number = x)))
				{
					pop(psp);
					return opterror("*", 0, version, id, catalog);
				}
			}
		}
	}
	else if (w && v)
	{
		pop(psp);
		return opterror("=", 0, version, id, catalog);
	}
	else
	{
		opt_info.num = (long)(opt_info.number = num);
		if (!w && !argv[opt_info.index][opt_info.offset])
		{
			opt_info.offset = 0;
			opt_info.index++;
		}
	}
	pop(psp);
	return c;
 help:
	if (v && *v == '?' && *(v + 1) == '?' && *(v + 2))
	{
		s = v + 2;
		if ((s[0] == 'n' || s[0] == 'N') && (s[1] == 'o' || s[1] == 'O'))
		{
			s += 2;
			n = -1;
		}
		else
			n = 1;
		if (hp = (Help_t*)search(styles, elementsof(styles), sizeof(styles[0]), s))
		{
			if (hp->style < STYLE_man || !(s = argv[opt_info.index]) || s[0] != '-' || s[1] != '-' || !s[2])
			{
				opt_info.arg = sfprints("\fversion=%d", version);
				pop(psp);
				return '?';
			}
			state.force = hp->style;
		}
		else if (match(s, "CONFORMANCE", -1, ID, NiL))
		{
			opt_info.arg = sfprints("\f%s", conformance(w, 0));
			pop(psp);
			return '?';
		}
		else if (match(s, "ESC", -1, ID, NiL) || match(s, "EMPHASIS", -1, ID, NiL))
			state.emphasis = n;
		else if (match(s, "MAN", -1, ID, NiL))
		{
			opt_info.arg = sfprints("\f%s", secname(*w != '?' ? w : pass->section));
			pop(psp);
			return '?';
		}
		else if (match(s, "PREFORMAT", -1, ID, NiL))
			state.flags |= OPT_preformat;
		else if (match(s, "SECTION", -1, ID, NiL))
		{
			opt_info.arg = sfprints("\f%s", pass->section);
			pop(psp);
			return '?';
		}
		else if (match(s, "TEST", -1, ID, NiL))
		{
			state.width = OPT_WIDTH;
			state.emphasis = 1;
		}
		else
		{
			pop(psp);
			return opterror(v, 0, version, id, catalog);
		}
		psp = pop(psp);
		if (argv == state.strv)
			return '#';
		goto again;
	}
	if ((opt_info.arg = opthelp(NiL, v)) == (char*)unknown)
	{
		pop(psp);
		return opterror(v, 0, version, id, catalog);
	}
	pop(psp);
	return '?';
 nospace:
	pop(psp);
	return opterror(NiL, 0, 0, NiL, NiL);
}

/*
 * parse long options with 0,1,2 leading '-' or '+' from string and pass to optget()
 * syntax is the unquoted
 *
 *	<length> [-|+|--|++]<name>[[-+:|&=]=<value>\n (or \0 for the last)
 *
 * or the quoted
 *
 *	[-|+|--|++][no]name[[-+:|&=]=['"{(]value[)}"']][, ]...
 *
 * with \x escapes passed to chresc()
 *
 * return '#' for `label:', with opt_info.name==label
 * str[opt_info.offset]	next arg
 *
 *	optstr(s, 0)
 *		return '-' if arg, 0 otherwise
 *	optstr(0, opts)
 *		use previous parsed str
 */

int
optstr(const char* str, const char* opts)
{
	register char*		s = (char*)str;
	register Sfio_t*	mp;
	register int		c;
	register int		ql;
	register int		qr;
	register int		qc;
	int			v;
	char*			e;

 again:
	if (s)
	{
		if (!(mp = state.strp) && !(mp = state.strp = sfstropen()))
			return 0;
		if (state.str != s)
			state.str = s;
		else if (opt_info.index == 1)
			s += opt_info.offset;
		while (*s == ',' || *s == ' ' || *s == '\t' || *s == '\n' || *s == '\r')
			s++;
		if (!*s)
		{
			state.str = 0;
			return 0;
		}
		if (*s == '-' || *s == '+')
		{
			c = *s++;
			sfputc(mp, c);
			if (*s == c)
			{
				sfputc(mp, c);
				s++;
			}
		}
		else
		{
			sfputc(mp, '-');
			sfputc(mp, '-');
		}
		if (isdigit(*s) && (v = (int)strtol(s, &e, 10)) > 1 && isspace(*e) && --v <= strlen(s) && (s[v] == 0 || s[v] == '\n'))
		{
			s += v;
			while (isspace(*++e));
			sfwrite(mp, e, s - e);
		}
		else
		{
			while (*s && *s != ',' && *s != ' ' && *s != '\t' && *s != '\n' && *s != '\r' && *s != '=' && *s != ':')
				sfputc(mp, *s++);
			if ((c = *s) == ':' && *(s + 1) != '=')
			{
				opt_info.index = 1;
				opt_info.offset = ++s - (char*)str;
				if (!(s = sfstruse(mp)))
					goto nospace;
				s += 2;
				e = opt_info.name;
				while (e < &opt_info.name[sizeof(opt_info.name)-1] && (*e++ = *s++));
				opt_info.arg = 0;
				opt_info.num = (long)(opt_info.number = 0);
				opt_info.option[0] = ':';
				opt_info.option[1] = 0;
				return '#';
			}
			if (c == ':' || c == '=')
			{
				sfputc(mp, c);
				ql = qr = 0;
				while (c = *++s)
				{
					if (c == '\\')
					{
						sfputc(mp, chresc(s, &e));
						s = e - 1;
					}
					else if (c == qr)
					{
						if (qr != ql)
							sfputc(mp, c);
						if (--qc <= 0)
							qr = ql = 0;
					}
					else if (c == ql)
					{
						sfputc(mp, c);
						qc++;
					}
					else if (qr)
						sfputc(mp, c);
					else if (c == ',' || c == ' ' || c == '\t' || c == '\n' || c == '\r')
						break;
					else if (c == '"' || c == '\'')
					{
						ql = qr = c;
						qc = 1;
					}
					else
					{
						sfputc(mp, c);
						if (c == GO)
						{
							ql = c;
							qr = OG;
							qc = 1;
						}
						else if (c == '(')
						{
							ql = c;
							qr = ')';
							qc = 1;
						}
					}
				}
			}
		}
		opt_info.argv = state.strv;
		state.strv[0] = T(NiL, ID, "option");
		if (!(state.strv[1] = sfstruse(mp)))
			goto nospace;
		state.strv[2] = 0;
		opt_info.offset = s - (char*)str;
	}
	if (opts)
	{
		if (!state.strv[1])
		{
			state.str = 0;
			return 0;
		}
		opt_info.index = 1;
		v = opt_info.offset;
		opt_info.offset = 0;
		c = optget(state.strv, opts);
		opt_info.index = 1;
		opt_info.offset = v;
		if (c == '#')
		{
			s = state.str;
			goto again;
		}
		if ((c == '?' || c == ':') && (opt_info.arg[0] == '-' && opt_info.arg[1] == '-'))
			opt_info.arg += 2;
		s = opt_info.name;
		if (*s++ == '-' && *s++ == '-' && *s)
		{
			e = opt_info.name;
			while (*e++ = *s++);
		}
	}
	else
		c = '-';
	return c;
 nospace:
	return opterror(NiL, 0, 0, NiL, NiL);
}
