usr/src/cmd/mandoc/mdoc_argv.c - illumos-gate - Gitiles

 /*	$Id: mdoc_argv.c,v 1.82 2012/03/23 05:50:24 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include <sys/types.h>

 #include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>

 #include "mdoc.h"
 #include "mandoc.h"
 #include "libmdoc.h"
 #include "libmandoc.h"

 #define	MULTI_STEP	 5 /* pre-allocate argument values */
 #define	DELIMSZ	  	 6 /* max possible size of a delimiter */

 enum	argsflag {
 	ARGSFL_NONE = 0,
 	ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
 	ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
 };

 enum	argvflag {
 	ARGV_NONE, /* no args to flag (e.g., -split) */
 	ARGV_SINGLE, /* one arg to flag (e.g., -file xxx)  */
 	ARGV_MULTI, /* multiple args (e.g., -column xxx yyy) */
 	ARGV_OPT_SINGLE /* optional arg (e.g., -offset [xxx]) */
 };

 struct	mdocarg {
 	enum argsflag	 flags;
 	const enum mdocargt *argvs;
 };

 static	void		 argn_free(struct mdoc_arg *, int);
 static	enum margserr	 args(struct mdoc *, int, int *,
 				char *, enum argsflag, char **);
 static	int		 args_checkpunct(const char *, int);
 static	int		 argv_multi(struct mdoc *, int,
 				struct mdoc_argv *, int *, char *);
 static	int		 argv_opt_single(struct mdoc *, int,
 				struct mdoc_argv *, int *, char *);
 static	int		 argv_single(struct mdoc *, int,
 				struct mdoc_argv *, int *, char *);

 static	const enum argvflag argvflags[MDOC_ARG_MAX] = {
 	ARGV_NONE,	/* MDOC_Split */
 	ARGV_NONE,	/* MDOC_Nosplit */
 	ARGV_NONE,	/* MDOC_Ragged */
 	ARGV_NONE,	/* MDOC_Unfilled */
 	ARGV_NONE,	/* MDOC_Literal */
 	ARGV_SINGLE,	/* MDOC_File */
 	ARGV_OPT_SINGLE, /* MDOC_Offset */
 	ARGV_NONE,	/* MDOC_Bullet */
 	ARGV_NONE,	/* MDOC_Dash */
 	ARGV_NONE,	/* MDOC_Hyphen */
 	ARGV_NONE,	/* MDOC_Item */
 	ARGV_NONE,	/* MDOC_Enum */
 	ARGV_NONE,	/* MDOC_Tag */
 	ARGV_NONE,	/* MDOC_Diag */
 	ARGV_NONE,	/* MDOC_Hang */
 	ARGV_NONE,	/* MDOC_Ohang */
 	ARGV_NONE,	/* MDOC_Inset */
 	ARGV_MULTI,	/* MDOC_Column */
 	ARGV_OPT_SINGLE, /* MDOC_Width */
 	ARGV_NONE,	/* MDOC_Compact */
 	ARGV_NONE,	/* MDOC_Std */
 	ARGV_NONE,	/* MDOC_Filled */
 	ARGV_NONE,	/* MDOC_Words */
 	ARGV_NONE,	/* MDOC_Emphasis */
 	ARGV_NONE,	/* MDOC_Symbolic */
 	ARGV_NONE	/* MDOC_Symbolic */
 };

 static	const enum mdocargt args_Ex[] = {
 	MDOC_Std,
 	MDOC_ARG_MAX
 };

 static	const enum mdocargt args_An[] = {
 	MDOC_Split,
 	MDOC_Nosplit,
 	MDOC_ARG_MAX
 };

 static	const enum mdocargt args_Bd[] = {
 	MDOC_Ragged,
 	MDOC_Unfilled,
 	MDOC_Filled,
 	MDOC_Literal,
 	MDOC_File,
 	MDOC_Offset,
 	MDOC_Compact,
 	MDOC_Centred,
 	MDOC_ARG_MAX
 };

 static	const enum mdocargt args_Bf[] = {
 	MDOC_Emphasis,
 	MDOC_Literal,
 	MDOC_Symbolic,
 	MDOC_ARG_MAX
 };

 static	const enum mdocargt args_Bk[] = {
 	MDOC_Words,
 	MDOC_ARG_MAX
 };

 static	const enum mdocargt args_Bl[] = {
 	MDOC_Bullet,
 	MDOC_Dash,
 	MDOC_Hyphen,
 	MDOC_Item,
 	MDOC_Enum,
 	MDOC_Tag,
 	MDOC_Diag,
 	MDOC_Hang,
 	MDOC_Ohang,
 	MDOC_Inset,
 	MDOC_Column,
 	MDOC_Width,
 	MDOC_Offset,
 	MDOC_Compact,
 	MDOC_Nested,
 	MDOC_ARG_MAX
 };

 static	const struct mdocarg mdocargs[MDOC_MAX] = {
 	{ ARGSFL_NONE, NULL }, /* Ap */
 	{ ARGSFL_NONE, NULL }, /* Dd */
 	{ ARGSFL_NONE, NULL }, /* Dt */
 	{ ARGSFL_NONE, NULL }, /* Os */
 	{ ARGSFL_NONE, NULL }, /* Sh */
 	{ ARGSFL_NONE, NULL }, /* Ss */
 	{ ARGSFL_NONE, NULL }, /* Pp */
 	{ ARGSFL_DELIM, NULL }, /* D1 */
 	{ ARGSFL_DELIM, NULL }, /* Dl */
 	{ ARGSFL_NONE, args_Bd }, /* Bd */
 	{ ARGSFL_NONE, NULL }, /* Ed */
 	{ ARGSFL_NONE, args_Bl }, /* Bl */
 	{ ARGSFL_NONE, NULL }, /* El */
 	{ ARGSFL_NONE, NULL }, /* It */
 	{ ARGSFL_DELIM, NULL }, /* Ad */
 	{ ARGSFL_DELIM, args_An }, /* An */
 	{ ARGSFL_DELIM, NULL }, /* Ar */
 	{ ARGSFL_NONE, NULL }, /* Cd */
 	{ ARGSFL_DELIM, NULL }, /* Cm */
 	{ ARGSFL_DELIM, NULL }, /* Dv */
 	{ ARGSFL_DELIM, NULL }, /* Er */
 	{ ARGSFL_DELIM, NULL }, /* Ev */
 	{ ARGSFL_NONE, args_Ex }, /* Ex */
 	{ ARGSFL_DELIM, NULL }, /* Fa */
 	{ ARGSFL_NONE, NULL }, /* Fd */
 	{ ARGSFL_DELIM, NULL }, /* Fl */
 	{ ARGSFL_DELIM, NULL }, /* Fn */
 	{ ARGSFL_DELIM, NULL }, /* Ft */
 	{ ARGSFL_DELIM, NULL }, /* Ic */
 	{ ARGSFL_NONE, NULL }, /* In */
 	{ ARGSFL_DELIM, NULL }, /* Li */
 	{ ARGSFL_NONE, NULL }, /* Nd */
 	{ ARGSFL_DELIM, NULL }, /* Nm */
 	{ ARGSFL_DELIM, NULL }, /* Op */
 	{ ARGSFL_NONE, NULL }, /* Ot */
 	{ ARGSFL_DELIM, NULL }, /* Pa */
 	{ ARGSFL_NONE, args_Ex }, /* Rv */
 	{ ARGSFL_DELIM, NULL }, /* St */
 	{ ARGSFL_DELIM, NULL }, /* Va */
 	{ ARGSFL_DELIM, NULL }, /* Vt */
 	{ ARGSFL_DELIM, NULL }, /* Xr */
 	{ ARGSFL_NONE, NULL }, /* %A */
 	{ ARGSFL_NONE, NULL }, /* %B */
 	{ ARGSFL_NONE, NULL }, /* %D */
 	{ ARGSFL_NONE, NULL }, /* %I */
 	{ ARGSFL_NONE, NULL }, /* %J */
 	{ ARGSFL_NONE, NULL }, /* %N */
 	{ ARGSFL_NONE, NULL }, /* %O */
 	{ ARGSFL_NONE, NULL }, /* %P */
 	{ ARGSFL_NONE, NULL }, /* %R */
 	{ ARGSFL_NONE, NULL }, /* %T */
 	{ ARGSFL_NONE, NULL }, /* %V */
 	{ ARGSFL_DELIM, NULL }, /* Ac */
 	{ ARGSFL_NONE, NULL }, /* Ao */
 	{ ARGSFL_DELIM, NULL }, /* Aq */
 	{ ARGSFL_DELIM, NULL }, /* At */
 	{ ARGSFL_DELIM, NULL }, /* Bc */
 	{ ARGSFL_NONE, args_Bf }, /* Bf */
 	{ ARGSFL_NONE, NULL }, /* Bo */
 	{ ARGSFL_DELIM, NULL }, /* Bq */
 	{ ARGSFL_DELIM, NULL }, /* Bsx */
 	{ ARGSFL_DELIM, NULL }, /* Bx */
 	{ ARGSFL_NONE, NULL }, /* Db */
 	{ ARGSFL_DELIM, NULL }, /* Dc */
 	{ ARGSFL_NONE, NULL }, /* Do */
 	{ ARGSFL_DELIM, NULL }, /* Dq */
 	{ ARGSFL_DELIM, NULL }, /* Ec */
 	{ ARGSFL_NONE, NULL }, /* Ef */
 	{ ARGSFL_DELIM, NULL }, /* Em */
 	{ ARGSFL_NONE, NULL }, /* Eo */
 	{ ARGSFL_DELIM, NULL }, /* Fx */
 	{ ARGSFL_DELIM, NULL }, /* Ms */
 	{ ARGSFL_DELIM, NULL }, /* No */
 	{ ARGSFL_DELIM, NULL }, /* Ns */
 	{ ARGSFL_DELIM, NULL }, /* Nx */
 	{ ARGSFL_DELIM, NULL }, /* Ox */
 	{ ARGSFL_DELIM, NULL }, /* Pc */
 	{ ARGSFL_DELIM, NULL }, /* Pf */
 	{ ARGSFL_NONE, NULL }, /* Po */
 	{ ARGSFL_DELIM, NULL }, /* Pq */
 	{ ARGSFL_DELIM, NULL }, /* Qc */
 	{ ARGSFL_DELIM, NULL }, /* Ql */
 	{ ARGSFL_NONE, NULL }, /* Qo */
 	{ ARGSFL_DELIM, NULL }, /* Qq */
 	{ ARGSFL_NONE, NULL }, /* Re */
 	{ ARGSFL_NONE, NULL }, /* Rs */
 	{ ARGSFL_DELIM, NULL }, /* Sc */
 	{ ARGSFL_NONE, NULL }, /* So */
 	{ ARGSFL_DELIM, NULL }, /* Sq */
 	{ ARGSFL_NONE, NULL }, /* Sm */
 	{ ARGSFL_DELIM, NULL }, /* Sx */
 	{ ARGSFL_DELIM, NULL }, /* Sy */
 	{ ARGSFL_DELIM, NULL }, /* Tn */
 	{ ARGSFL_DELIM, NULL }, /* Ux */
 	{ ARGSFL_DELIM, NULL }, /* Xc */
 	{ ARGSFL_NONE, NULL }, /* Xo */
 	{ ARGSFL_NONE, NULL }, /* Fo */
 	{ ARGSFL_NONE, NULL }, /* Fc */
 	{ ARGSFL_NONE, NULL }, /* Oo */
 	{ ARGSFL_DELIM, NULL }, /* Oc */
 	{ ARGSFL_NONE, args_Bk }, /* Bk */
 	{ ARGSFL_NONE, NULL }, /* Ek */
 	{ ARGSFL_NONE, NULL }, /* Bt */
 	{ ARGSFL_NONE, NULL }, /* Hf */
 	{ ARGSFL_NONE, NULL }, /* Fr */
 	{ ARGSFL_NONE, NULL }, /* Ud */
 	{ ARGSFL_NONE, NULL }, /* Lb */
 	{ ARGSFL_NONE, NULL }, /* Lp */
 	{ ARGSFL_DELIM, NULL }, /* Lk */
 	{ ARGSFL_DELIM, NULL }, /* Mt */
 	{ ARGSFL_DELIM, NULL }, /* Brq */
 	{ ARGSFL_NONE, NULL }, /* Bro */
 	{ ARGSFL_DELIM, NULL }, /* Brc */
 	{ ARGSFL_NONE, NULL }, /* %C */
 	{ ARGSFL_NONE, NULL }, /* Es */
 	{ ARGSFL_NONE, NULL }, /* En */
 	{ ARGSFL_NONE, NULL }, /* Dx */
 	{ ARGSFL_NONE, NULL }, /* %Q */
 	{ ARGSFL_NONE, NULL }, /* br */
 	{ ARGSFL_NONE, NULL }, /* sp */
 	{ ARGSFL_NONE, NULL }, /* %U */
 	{ ARGSFL_NONE, NULL }, /* Ta */
 };


 /*
  * Parse an argument from line text.  This comes in the form of -key
  * [value0...], which may either have a single mandatory value, at least
  * one mandatory value, an optional single value, or no value.
  */
 enum margverr
 mdoc_argv(struct mdoc *m, int line, enum mdoct tok,
 		struct mdoc_arg **v, int *pos, char *buf)
 {
 	char		 *p, sv;
 	struct mdoc_argv tmp;
 	struct mdoc_arg	 *arg;
 	const enum mdocargt *ap;

 	if ('\0' == buf[*pos])
 		return(ARGV_EOLN);
 	else if (NULL == (ap = mdocargs[tok].argvs))
 		return(ARGV_WORD);
 	else if ('-' != buf[*pos])
 		return(ARGV_WORD);

 	/* Seek to the first unescaped space. */

 	p = &buf[++(*pos)];

 	assert(*pos > 0);

 	for ( ; buf[*pos] ; (*pos)++)
 		if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
 			break;

 	/*
 	 * We want to nil-terminate the word to look it up (it's easier
 	 * that way).  But we may not have a flag, in which case we need
 	 * to restore the line as-is.  So keep around the stray byte,
 	 * which we'll reset upon exiting (if necessary).
 	 */

 	if ('\0' != (sv = buf[*pos]))
 		buf[(*pos)++] = '\0';

 	/*
 	 * Now look up the word as a flag.  Use temporary storage that
 	 * we'll copy into the node's flags, if necessary.
 	 */

 	memset(&tmp, 0, sizeof(struct mdoc_argv));

 	tmp.line = line;
 	tmp.pos = *pos;
 	tmp.arg = MDOC_ARG_MAX;

 	while (MDOC_ARG_MAX != (tmp.arg = *ap++))
 		if (0 == strcmp(p, mdoc_argnames[tmp.arg]))
 			break;

 	if (MDOC_ARG_MAX == tmp.arg) {
 		/*
 		 * The flag was not found.
 		 * Restore saved zeroed byte and return as a word.
 		 */
 		if (sv)
 			buf[*pos - 1] = sv;
 		return(ARGV_WORD);
 	}

 	/* Read to the next word (the argument). */

 	while (buf[*pos] && ' ' == buf[*pos])
 		(*pos)++;

 	switch (argvflags[tmp.arg]) {
 	case (ARGV_SINGLE):
 		if ( ! argv_single(m, line, &tmp, pos, buf))
 			return(ARGV_ERROR);
 		break;
 	case (ARGV_MULTI):
 		if ( ! argv_multi(m, line, &tmp, pos, buf))
 			return(ARGV_ERROR);
 		break;
 	case (ARGV_OPT_SINGLE):
 		if ( ! argv_opt_single(m, line, &tmp, pos, buf))
 			return(ARGV_ERROR);
 		break;
 	case (ARGV_NONE):
 		break;
 	}

 	if (NULL == (arg = *v))
 		arg = *v = mandoc_calloc(1, sizeof(struct mdoc_arg));

 	arg->argc++;
 	arg->argv = mandoc_realloc
 		(arg->argv, arg->argc * sizeof(struct mdoc_argv));

 	memcpy(&arg->argv[(int)arg->argc - 1],
 			&tmp, sizeof(struct mdoc_argv));

 	return(ARGV_ARG);
 }

 void
 mdoc_argv_free(struct mdoc_arg *p)
 {
 	int		 i;

 	if (NULL == p)
 		return;

 	if (p->refcnt) {
 		--(p->refcnt);
 		if (p->refcnt)
 			return;
 	}
 	assert(p->argc);

 	for (i = (int)p->argc - 1; i >= 0; i--)
 		argn_free(p, i);

 	free(p->argv);
 	free(p);
 }

 static void
 argn_free(struct mdoc_arg *p, int iarg)
 {
 	struct mdoc_argv *arg;
 	int		  j;

 	arg = &p->argv[iarg];

 	if (arg->sz && arg->value) {
 		for (j = (int)arg->sz - 1; j >= 0; j--)
 			free(arg->value[j]);
 		free(arg->value);
 	}

 	for (--p->argc; iarg < (int)p->argc; iarg++)
 		p->argv[iarg] = p->argv[iarg+1];
 }

 enum margserr
 mdoc_zargs(struct mdoc *m, int line, int *pos, char *buf, char **v)
 {

 	return(args(m, line, pos, buf, ARGSFL_NONE, v));
 }

 enum margserr
 mdoc_args(struct mdoc *m, int line, int *pos,
 		char *buf, enum mdoct tok, char **v)
 {
 	enum argsflag	  fl;
 	struct mdoc_node *n;

 	fl = mdocargs[tok].flags;

 	if (MDOC_It != tok)
 		return(args(m, line, pos, buf, fl, v));

 	/*
 	 * We know that we're in an `It', so it's reasonable to expect
 	 * us to be sitting in a `Bl'.  Someday this may not be the case
 	 * (if we allow random `It's sitting out there), so provide a
 	 * safe fall-back into the default behaviour.
 	 */

 	for (n = m->last; n; n = n->parent)
 		if (MDOC_Bl == n->tok)
 			if (LIST_column == n->norm->Bl.type) {
 				fl = ARGSFL_TABSEP;
 				break;
 			}

 	return(args(m, line, pos, buf, fl, v));
 }

 static enum margserr
 args(struct mdoc *m, int line, int *pos,
 		char *buf, enum argsflag fl, char **v)
 {
 	char		*p, *pp;
 	enum margserr	 rc;

 	if ('\0' == buf[*pos]) {
 		if (MDOC_PPHRASE & m->flags)
 			return(ARGS_EOLN);
 		/*
 		 * If we're not in a partial phrase and the flag for
 		 * being a phrase literal is still set, the punctuation
 		 * is unterminated.
 		 */
 		if (MDOC_PHRASELIT & m->flags)
 			mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);

 		m->flags &= ~MDOC_PHRASELIT;
 		return(ARGS_EOLN);
 	}

 	*v = &buf[*pos];

 	if (ARGSFL_DELIM == fl)
 		if (args_checkpunct(buf, *pos))
 			return(ARGS_PUNCT);

 	/*
 	 * First handle TABSEP items, restricted to `Bl -column'.  This
 	 * ignores conventional token parsing and instead uses tabs or
 	 * `Ta' macros to separate phrases.  Phrases are parsed again
 	 * for arguments at a later phase.
 	 */

 	if (ARGSFL_TABSEP == fl) {
 		/* Scan ahead to tab (can't be escaped). */
 		p = strchr(*v, '\t');
 		pp = NULL;

 		/* Scan ahead to unescaped `Ta'. */
 		if ( ! (MDOC_PHRASELIT & m->flags))
 			for (pp = *v; ; pp++) {
 				if (NULL == (pp = strstr(pp, "Ta")))
 					break;
 				if (pp > *v && ' ' != *(pp - 1))
 					continue;
 				if (' ' == *(pp + 2) || '\0' == *(pp + 2))
 					break;
 			}

 		/* By default, assume a phrase. */
 		rc = ARGS_PHRASE;

 		/*
 		 * Adjust new-buffer position to be beyond delimiter
 		 * mark (e.g., Ta -> end + 2).
 		 */
 		if (p && pp) {
 			*pos += pp < p ? 2 : 1;
 			rc = pp < p ? ARGS_PHRASE : ARGS_PPHRASE;
 			p = pp < p ? pp : p;
 		} else if (p && ! pp) {
 			rc = ARGS_PPHRASE;
 			*pos += 1;
 		} else if (pp && ! p) {
 			p = pp;
 			*pos += 2;
 		} else {
 			rc = ARGS_PEND;
 			p = strchr(*v, 0);
 		}

 		/* Whitespace check for eoln case... */
 		if ('\0' == *p && ' ' == *(p - 1))
 			mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);

 		*pos += (int)(p - *v);

 		/* Strip delimiter's preceding whitespace. */
 		pp = p - 1;
 		while (pp > *v && ' ' == *pp) {
 			if (pp > *v && '\\' == *(pp - 1))
 				break;
 			pp--;
 		}
 		*(pp + 1) = 0;

 		/* Strip delimiter's proceeding whitespace. */
 		for (pp = &buf[*pos]; ' ' == *pp; pp++, (*pos)++)
 			/* Skip ahead. */ ;

 		return(rc);
 	}

 	/*
 	 * Process a quoted literal.  A quote begins with a double-quote
 	 * and ends with a double-quote NOT preceded by a double-quote.
 	 * Whitespace is NOT involved in literal termination.
 	 */

 	if (MDOC_PHRASELIT & m->flags || '\"' == buf[*pos]) {
 		if ( ! (MDOC_PHRASELIT & m->flags))
 			*v = &buf[++(*pos)];

 		if (MDOC_PPHRASE & m->flags)
 			m->flags |= MDOC_PHRASELIT;

 		for ( ; buf[*pos]; (*pos)++) {
 			if ('\"' != buf[*pos])
 				continue;
 			if ('\"' != buf[*pos + 1])
 				break;
 			(*pos)++;
 		}

 		if ('\0' == buf[*pos]) {
 			if (MDOC_PPHRASE & m->flags)
 				return(ARGS_QWORD);
 			mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);
 			return(ARGS_QWORD);
 		}

 		m->flags &= ~MDOC_PHRASELIT;
 		buf[(*pos)++] = '\0';

 		if ('\0' == buf[*pos])
 			return(ARGS_QWORD);

 		while (' ' == buf[*pos])
 			(*pos)++;

 		if ('\0' == buf[*pos])
 			mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);

 		return(ARGS_QWORD);
 	}

 	p = &buf[*pos];
 	*v = mandoc_getarg(m->parse, &p, line, pos);

 	return(ARGS_WORD);
 }

 /*
  * Check if the string consists only of space-separated closing
  * delimiters.  This is a bit of a dance: the first must be a close
  * delimiter, but it may be followed by middle delimiters.  Arbitrary
  * whitespace may separate these tokens.
  */
 static int
 args_checkpunct(const char *buf, int i)
 {
 	int		 j;
 	char		 dbuf[DELIMSZ];
 	enum mdelim	 d;

 	/* First token must be a close-delimiter. */

 	for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
 		dbuf[j] = buf[i];

 	if (DELIMSZ == j)
 		return(0);

 	dbuf[j] = '\0';
 	if (DELIM_CLOSE != mdoc_isdelim(dbuf))
 		return(0);

 	while (' ' == buf[i])
 		i++;

 	/* Remaining must NOT be open/none. */

 	while (buf[i]) {
 		j = 0;
 		while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
 			dbuf[j++] = buf[i++];

 		if (DELIMSZ == j)
 			return(0);

 		dbuf[j] = '\0';
 		d = mdoc_isdelim(dbuf);
 		if (DELIM_NONE == d || DELIM_OPEN == d)
 			return(0);

 		while (' ' == buf[i])
 			i++;
 	}

 	return('\0' == buf[i]);
 }

 static int
 argv_multi(struct mdoc *m, int line,
 		struct mdoc_argv *v, int *pos, char *buf)
 {
 	enum margserr	 ac;
 	char		*p;

 	for (v->sz = 0; ; v->sz++) {
 		if ('-' == buf[*pos])
 			break;
 		ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
 		if (ARGS_ERROR == ac)
 			return(0);
 		else if (ARGS_EOLN == ac)
 			break;

 		if (0 == v->sz % MULTI_STEP)
 			v->value = mandoc_realloc(v->value,
 				(v->sz + MULTI_STEP) * sizeof(char *));

 		v->value[(int)v->sz] = mandoc_strdup(p);
 	}

 	return(1);
 }

 static int
 argv_opt_single(struct mdoc *m, int line,
 		struct mdoc_argv *v, int *pos, char *buf)
 {
 	enum margserr	 ac;
 	char		*p;

 	if ('-' == buf[*pos])
 		return(1);

 	ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
 	if (ARGS_ERROR == ac)
 		return(0);
 	if (ARGS_EOLN == ac)
 		return(1);

 	v->sz = 1;
 	v->value = mandoc_malloc(sizeof(char *));
 	v->value[0] = mandoc_strdup(p);

 	return(1);
 }

 static int
 argv_single(struct mdoc *m, int line,
 		struct mdoc_argv *v, int *pos, char *buf)
 {
 	int		 ppos;
 	enum margserr	 ac;
 	char		*p;

 	ppos = *pos;

 	ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
 	if (ARGS_EOLN == ac) {
 		mdoc_pmsg(m, line, ppos, MANDOCERR_SYNTARGVCOUNT);
 		return(0);
 	} else if (ARGS_ERROR == ac)
 		return(0);

 	v->sz = 1;
 	v->value = mandoc_malloc(sizeof(char *));
 	v->value[0] = mandoc_strdup(p);

 	return(1);
 }
	/* $Id: mdoc_argv.c,v 1.82 2012/03/23 05:50:24 kristaps Exp $ */
	/*
	* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
	*
	* Permission to use, copy, modify, and distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/
	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include <sys/types.h>

	#include <assert.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <string.h>

	#include "mdoc.h"
	#include "mandoc.h"
	#include "libmdoc.h"
	#include "libmandoc.h"

	#define MULTI_STEP 5 /* pre-allocate argument values */
	#define DELIMSZ 6 /* max possible size of a delimiter */

	enum argsflag {
	ARGSFL_NONE = 0,
	ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
	ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
	};

	enum argvflag {
	ARGV_NONE, /* no args to flag (e.g., -split) */
	ARGV_SINGLE, /* one arg to flag (e.g., -file xxx) */
	ARGV_MULTI, /* multiple args (e.g., -column xxx yyy) */
	ARGV_OPT_SINGLE /* optional arg (e.g., -offset [xxx]) */
	};

	struct mdocarg {
	enum argsflag flags;
	const enum mdocargt *argvs;
	};

	static void argn_free(struct mdoc_arg *, int);
	static enum margserr args(struct mdoc , int, int ,
	char , enum argsflag, char *);
	static int args_checkpunct(const char *, int);
	static int argv_multi(struct mdoc *, int,
	struct mdoc_argv , int , char *);
	static int argv_opt_single(struct mdoc *, int,
	struct mdoc_argv , int , char *);
	static int argv_single(struct mdoc *, int,
	struct mdoc_argv , int , char *);

	static const enum argvflag argvflags[MDOC_ARG_MAX] = {
	ARGV_NONE, /* MDOC_Split */
	ARGV_NONE, /* MDOC_Nosplit */
	ARGV_NONE, /* MDOC_Ragged */
	ARGV_NONE, /* MDOC_Unfilled */
	ARGV_NONE, /* MDOC_Literal */
	ARGV_SINGLE, /* MDOC_File */
	ARGV_OPT_SINGLE, /* MDOC_Offset */
	ARGV_NONE, /* MDOC_Bullet */
	ARGV_NONE, /* MDOC_Dash */
	ARGV_NONE, /* MDOC_Hyphen */
	ARGV_NONE, /* MDOC_Item */
	ARGV_NONE, /* MDOC_Enum */
	ARGV_NONE, /* MDOC_Tag */
	ARGV_NONE, /* MDOC_Diag */
	ARGV_NONE, /* MDOC_Hang */
	ARGV_NONE, /* MDOC_Ohang */
	ARGV_NONE, /* MDOC_Inset */
	ARGV_MULTI, /* MDOC_Column */
	ARGV_OPT_SINGLE, /* MDOC_Width */
	ARGV_NONE, /* MDOC_Compact */
	ARGV_NONE, /* MDOC_Std */
	ARGV_NONE, /* MDOC_Filled */
	ARGV_NONE, /* MDOC_Words */
	ARGV_NONE, /* MDOC_Emphasis */
	ARGV_NONE, /* MDOC_Symbolic */
	ARGV_NONE /* MDOC_Symbolic */
	};

	static const enum mdocargt args_Ex[] = {
	MDOC_Std,
	MDOC_ARG_MAX
	};

	static const enum mdocargt args_An[] = {
	MDOC_Split,
	MDOC_Nosplit,
	MDOC_ARG_MAX
	};

	static const enum mdocargt args_Bd[] = {
	MDOC_Ragged,
	MDOC_Unfilled,
	MDOC_Filled,
	MDOC_Literal,
	MDOC_File,
	MDOC_Offset,
	MDOC_Compact,
	MDOC_Centred,
	MDOC_ARG_MAX
	};

	static const enum mdocargt args_Bf[] = {
	MDOC_Emphasis,
	MDOC_Literal,
	MDOC_Symbolic,
	MDOC_ARG_MAX
	};

	static const enum mdocargt args_Bk[] = {
	MDOC_Words,
	MDOC_ARG_MAX
	};

	static const enum mdocargt args_Bl[] = {
	MDOC_Bullet,
	MDOC_Dash,
	MDOC_Hyphen,
	MDOC_Item,
	MDOC_Enum,
	MDOC_Tag,
	MDOC_Diag,
	MDOC_Hang,
	MDOC_Ohang,
	MDOC_Inset,
	MDOC_Column,
	MDOC_Width,
	MDOC_Offset,
	MDOC_Compact,
	MDOC_Nested,
	MDOC_ARG_MAX
	};

	static const struct mdocarg mdocargs[MDOC_MAX] = {
	{ ARGSFL_NONE, NULL }, /* Ap */
	{ ARGSFL_NONE, NULL }, /* Dd */
	{ ARGSFL_NONE, NULL }, /* Dt */
	{ ARGSFL_NONE, NULL }, /* Os */
	{ ARGSFL_NONE, NULL }, /* Sh */
	{ ARGSFL_NONE, NULL }, /* Ss */
	{ ARGSFL_NONE, NULL }, /* Pp */
	{ ARGSFL_DELIM, NULL }, /* D1 */
	{ ARGSFL_DELIM, NULL }, /* Dl */
	{ ARGSFL_NONE, args_Bd }, /* Bd */
	{ ARGSFL_NONE, NULL }, /* Ed */
	{ ARGSFL_NONE, args_Bl }, /* Bl */
	{ ARGSFL_NONE, NULL }, /* El */
	{ ARGSFL_NONE, NULL }, /* It */
	{ ARGSFL_DELIM, NULL }, /* Ad */
	{ ARGSFL_DELIM, args_An }, /* An */
	{ ARGSFL_DELIM, NULL }, /* Ar */
	{ ARGSFL_NONE, NULL }, /* Cd */
	{ ARGSFL_DELIM, NULL }, /* Cm */
	{ ARGSFL_DELIM, NULL }, /* Dv */
	{ ARGSFL_DELIM, NULL }, /* Er */
	{ ARGSFL_DELIM, NULL }, /* Ev */
	{ ARGSFL_NONE, args_Ex }, /* Ex */
	{ ARGSFL_DELIM, NULL }, /* Fa */
	{ ARGSFL_NONE, NULL }, /* Fd */
	{ ARGSFL_DELIM, NULL }, /* Fl */
	{ ARGSFL_DELIM, NULL }, /* Fn */
	{ ARGSFL_DELIM, NULL }, /* Ft */
	{ ARGSFL_DELIM, NULL }, /* Ic */
	{ ARGSFL_NONE, NULL }, /* In */
	{ ARGSFL_DELIM, NULL }, /* Li */
	{ ARGSFL_NONE, NULL }, /* Nd */
	{ ARGSFL_DELIM, NULL }, /* Nm */
	{ ARGSFL_DELIM, NULL }, /* Op */
	{ ARGSFL_NONE, NULL }, /* Ot */
	{ ARGSFL_DELIM, NULL }, /* Pa */
	{ ARGSFL_NONE, args_Ex }, /* Rv */
	{ ARGSFL_DELIM, NULL }, /* St */
	{ ARGSFL_DELIM, NULL }, /* Va */
	{ ARGSFL_DELIM, NULL }, /* Vt */
	{ ARGSFL_DELIM, NULL }, /* Xr */
	{ ARGSFL_NONE, NULL }, /* %A */
	{ ARGSFL_NONE, NULL }, /* %B */
	{ ARGSFL_NONE, NULL }, /* %D */
	{ ARGSFL_NONE, NULL }, /* %I */
	{ ARGSFL_NONE, NULL }, /* %J */
	{ ARGSFL_NONE, NULL }, /* %N */
	{ ARGSFL_NONE, NULL }, /* %O */
	{ ARGSFL_NONE, NULL }, /* %P */
	{ ARGSFL_NONE, NULL }, /* %R */
	{ ARGSFL_NONE, NULL }, /* %T */
	{ ARGSFL_NONE, NULL }, /* %V */
	{ ARGSFL_DELIM, NULL }, /* Ac */
	{ ARGSFL_NONE, NULL }, /* Ao */
	{ ARGSFL_DELIM, NULL }, /* Aq */
	{ ARGSFL_DELIM, NULL }, /* At */
	{ ARGSFL_DELIM, NULL }, /* Bc */
	{ ARGSFL_NONE, args_Bf }, /* Bf */
	{ ARGSFL_NONE, NULL }, /* Bo */
	{ ARGSFL_DELIM, NULL }, /* Bq */
	{ ARGSFL_DELIM, NULL }, /* Bsx */
	{ ARGSFL_DELIM, NULL }, /* Bx */
	{ ARGSFL_NONE, NULL }, /* Db */
	{ ARGSFL_DELIM, NULL }, /* Dc */
	{ ARGSFL_NONE, NULL }, /* Do */
	{ ARGSFL_DELIM, NULL }, /* Dq */
	{ ARGSFL_DELIM, NULL }, /* Ec */
	{ ARGSFL_NONE, NULL }, /* Ef */
	{ ARGSFL_DELIM, NULL }, /* Em */
	{ ARGSFL_NONE, NULL }, /* Eo */
	{ ARGSFL_DELIM, NULL }, /* Fx */
	{ ARGSFL_DELIM, NULL }, /* Ms */
	{ ARGSFL_DELIM, NULL }, /* No */
	{ ARGSFL_DELIM, NULL }, /* Ns */
	{ ARGSFL_DELIM, NULL }, /* Nx */
	{ ARGSFL_DELIM, NULL }, /* Ox */
	{ ARGSFL_DELIM, NULL }, /* Pc */
	{ ARGSFL_DELIM, NULL }, /* Pf */
	{ ARGSFL_NONE, NULL }, /* Po */
	{ ARGSFL_DELIM, NULL }, /* Pq */
	{ ARGSFL_DELIM, NULL }, /* Qc */
	{ ARGSFL_DELIM, NULL }, /* Ql */
	{ ARGSFL_NONE, NULL }, /* Qo */
	{ ARGSFL_DELIM, NULL }, /* Qq */
	{ ARGSFL_NONE, NULL }, /* Re */
	{ ARGSFL_NONE, NULL }, /* Rs */
	{ ARGSFL_DELIM, NULL }, /* Sc */
	{ ARGSFL_NONE, NULL }, /* So */
	{ ARGSFL_DELIM, NULL }, /* Sq */
	{ ARGSFL_NONE, NULL }, /* Sm */
	{ ARGSFL_DELIM, NULL }, /* Sx */
	{ ARGSFL_DELIM, NULL }, /* Sy */
	{ ARGSFL_DELIM, NULL }, /* Tn */
	{ ARGSFL_DELIM, NULL }, /* Ux */
	{ ARGSFL_DELIM, NULL }, /* Xc */
	{ ARGSFL_NONE, NULL }, /* Xo */
	{ ARGSFL_NONE, NULL }, /* Fo */
	{ ARGSFL_NONE, NULL }, /* Fc */
	{ ARGSFL_NONE, NULL }, /* Oo */
	{ ARGSFL_DELIM, NULL }, /* Oc */
	{ ARGSFL_NONE, args_Bk }, /* Bk */
	{ ARGSFL_NONE, NULL }, /* Ek */
	{ ARGSFL_NONE, NULL }, /* Bt */
	{ ARGSFL_NONE, NULL }, /* Hf */
	{ ARGSFL_NONE, NULL }, /* Fr */
	{ ARGSFL_NONE, NULL }, /* Ud */
	{ ARGSFL_NONE, NULL }, /* Lb */
	{ ARGSFL_NONE, NULL }, /* Lp */
	{ ARGSFL_DELIM, NULL }, /* Lk */
	{ ARGSFL_DELIM, NULL }, /* Mt */
	{ ARGSFL_DELIM, NULL }, /* Brq */
	{ ARGSFL_NONE, NULL }, /* Bro */
	{ ARGSFL_DELIM, NULL }, /* Brc */
	{ ARGSFL_NONE, NULL }, /* %C */
	{ ARGSFL_NONE, NULL }, /* Es */
	{ ARGSFL_NONE, NULL }, /* En */
	{ ARGSFL_NONE, NULL }, /* Dx */
	{ ARGSFL_NONE, NULL }, /* %Q */
	{ ARGSFL_NONE, NULL }, /* br */
	{ ARGSFL_NONE, NULL }, /* sp */
	{ ARGSFL_NONE, NULL }, /* %U */
	{ ARGSFL_NONE, NULL }, /* Ta */
	};


	/*
	* Parse an argument from line text. This comes in the form of -key
	* [value0...], which may either have a single mandatory value, at least
	* one mandatory value, an optional single value, or no value.
	*/
	enum margverr
	mdoc_argv(struct mdoc *m, int line, enum mdoct tok,
	struct mdoc_arg *v, int pos, char *buf)
	{
	char *p, sv;
	struct mdoc_argv tmp;
	struct mdoc_arg *arg;
	const enum mdocargt *ap;

	if ('\0' == buf[*pos])
	return(ARGV_EOLN);
	else if (NULL == (ap = mdocargs[tok].argvs))
	return(ARGV_WORD);
	else if ('-' != buf[*pos])
	return(ARGV_WORD);

	/* Seek to the first unescaped space. */

	p = &buf[++(*pos)];

	assert(*pos > 0);

	for ( ; buf[pos] ; (pos)++)
	if (' ' == buf[pos] && '\\' != buf[pos - 1])
	break;

	/*
	* We want to nil-terminate the word to look it up (it's easier
	* that way). But we may not have a flag, in which case we need
	* to restore the line as-is. So keep around the stray byte,
	* which we'll reset upon exiting (if necessary).
	*/

	if ('\0' != (sv = buf[*pos]))
	buf[(*pos)++] = '\0';

	/*
	* Now look up the word as a flag. Use temporary storage that
	* we'll copy into the node's flags, if necessary.
	*/

	memset(&tmp, 0, sizeof(struct mdoc_argv));

	tmp.line = line;
	tmp.pos = *pos;
	tmp.arg = MDOC_ARG_MAX;

	while (MDOC_ARG_MAX != (tmp.arg = *ap++))
	if (0 == strcmp(p, mdoc_argnames[tmp.arg]))
	break;

	if (MDOC_ARG_MAX == tmp.arg) {
	/*
	* The flag was not found.
	* Restore saved zeroed byte and return as a word.
	*/
	if (sv)
	buf[*pos - 1] = sv;
	return(ARGV_WORD);
	}

	/* Read to the next word (the argument). */

	while (buf[pos] && ' ' == buf[pos])
	(*pos)++;

	switch (argvflags[tmp.arg]) {
	case (ARGV_SINGLE):
	if ( ! argv_single(m, line, &tmp, pos, buf))
	return(ARGV_ERROR);
	break;
	case (ARGV_MULTI):
	if ( ! argv_multi(m, line, &tmp, pos, buf))
	return(ARGV_ERROR);
	break;
	case (ARGV_OPT_SINGLE):
	if ( ! argv_opt_single(m, line, &tmp, pos, buf))
	return(ARGV_ERROR);
	break;
	case (ARGV_NONE):
	break;
	}

	if (NULL == (arg = *v))
	arg = *v = mandoc_calloc(1, sizeof(struct mdoc_arg));

	arg->argc++;
	arg->argv = mandoc_realloc
	(arg->argv, arg->argc * sizeof(struct mdoc_argv));

	memcpy(&arg->argv[(int)arg->argc - 1],
	&tmp, sizeof(struct mdoc_argv));

	return(ARGV_ARG);
	}

	void
	mdoc_argv_free(struct mdoc_arg *p)
	{
	int i;

	if (NULL == p)
	return;

	if (p->refcnt) {
	--(p->refcnt);
	if (p->refcnt)
	return;
	}
	assert(p->argc);

	for (i = (int)p->argc - 1; i >= 0; i--)
	argn_free(p, i);

	free(p->argv);
	free(p);
	}

	static void
	argn_free(struct mdoc_arg *p, int iarg)
	{
	struct mdoc_argv *arg;
	int j;

	arg = &p->argv[iarg];

	if (arg->sz && arg->value) {
	for (j = (int)arg->sz - 1; j >= 0; j--)
	free(arg->value[j]);
	free(arg->value);
	}

	for (--p->argc; iarg < (int)p->argc; iarg++)
	p->argv[iarg] = p->argv[iarg+1];
	}

	enum margserr
	mdoc_zargs(struct mdoc m, int line, int pos, char buf, char *v)
	{

	return(args(m, line, pos, buf, ARGSFL_NONE, v));
	}

	enum margserr
	mdoc_args(struct mdoc m, int line, int pos,
	char buf, enum mdoct tok, char *v)
	{
	enum argsflag fl;
	struct mdoc_node *n;

	fl = mdocargs[tok].flags;

	if (MDOC_It != tok)
	return(args(m, line, pos, buf, fl, v));

	/*
	* We know that we're in an `It', so it's reasonable to expect
	* us to be sitting in a `Bl'. Someday this may not be the case
	* (if we allow random `It's sitting out there), so provide a
	* safe fall-back into the default behaviour.
	*/

	for (n = m->last; n; n = n->parent)
	if (MDOC_Bl == n->tok)
	if (LIST_column == n->norm->Bl.type) {
	fl = ARGSFL_TABSEP;
	break;
	}

	return(args(m, line, pos, buf, fl, v));
	}

	static enum margserr
	args(struct mdoc m, int line, int pos,
	char buf, enum argsflag fl, char *v)
	{
	char p, pp;
	enum margserr rc;

	if ('\0' == buf[*pos]) {
	if (MDOC_PPHRASE & m->flags)
	return(ARGS_EOLN);
	/*
	* If we're not in a partial phrase and the flag for
	* being a phrase literal is still set, the punctuation
	* is unterminated.
	*/
	if (MDOC_PHRASELIT & m->flags)
	mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);

	m->flags &= ~MDOC_PHRASELIT;
	return(ARGS_EOLN);
	}

	v = &buf[pos];

	if (ARGSFL_DELIM == fl)
	if (args_checkpunct(buf, *pos))
	return(ARGS_PUNCT);

	/*
	* First handle TABSEP items, restricted to `Bl -column'. This
	* ignores conventional token parsing and instead uses tabs or
	* `Ta' macros to separate phrases. Phrases are parsed again
	* for arguments at a later phase.
	*/

	if (ARGSFL_TABSEP == fl) {
	/* Scan ahead to tab (can't be escaped). */
	p = strchr(*v, '\t');
	pp = NULL;

	/* Scan ahead to unescaped `Ta'. */
	if ( ! (MDOC_PHRASELIT & m->flags))
	for (pp = *v; ; pp++) {
	if (NULL == (pp = strstr(pp, "Ta")))
	break;
	if (pp > v && ' ' != (pp - 1))
	continue;
	if (' ' == (pp + 2) \|\| '\0' == (pp + 2))
	break;
	}

	/* By default, assume a phrase. */
	rc = ARGS_PHRASE;

	/*
	* Adjust new-buffer position to be beyond delimiter
	* mark (e.g., Ta -> end + 2).
	*/
	if (p && pp) {
	*pos += pp < p ? 2 : 1;
	rc = pp < p ? ARGS_PHRASE : ARGS_PPHRASE;
	p = pp < p ? pp : p;
	} else if (p && ! pp) {
	rc = ARGS_PPHRASE;
	*pos += 1;
	} else if (pp && ! p) {
	p = pp;
	*pos += 2;
	} else {
	rc = ARGS_PEND;
	p = strchr(*v, 0);
	}

	/* Whitespace check for eoln case... */
	if ('\0' == p && ' ' == (p - 1))
	mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);

	pos += (int)(p - v);

	/* Strip delimiter's preceding whitespace. */
	pp = p - 1;
	while (pp > v && ' ' == pp) {
	if (pp > v && '\\' == (pp - 1))
	break;
	pp--;
	}
	*(pp + 1) = 0;

	/* Strip delimiter's proceeding whitespace. */
	for (pp = &buf[pos]; ' ' == pp; pp++, (*pos)++)
	/* Skip ahead. */ ;

	return(rc);
	}

	/*
	* Process a quoted literal. A quote begins with a double-quote
	* and ends with a double-quote NOT preceded by a double-quote.
	* Whitespace is NOT involved in literal termination.
	*/

	if (MDOC_PHRASELIT & m->flags \|\| '\"' == buf[*pos]) {
	if ( ! (MDOC_PHRASELIT & m->flags))
	v = &buf[++(pos)];

	if (MDOC_PPHRASE & m->flags)
	m->flags \|= MDOC_PHRASELIT;

	for ( ; buf[pos]; (pos)++) {
	if ('\"' != buf[*pos])
	continue;
	if ('\"' != buf[*pos + 1])
	break;
	(*pos)++;
	}

	if ('\0' == buf[*pos]) {
	if (MDOC_PPHRASE & m->flags)
	return(ARGS_QWORD);
	mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);
	return(ARGS_QWORD);
	}

	m->flags &= ~MDOC_PHRASELIT;
	buf[(*pos)++] = '\0';

	if ('\0' == buf[*pos])
	return(ARGS_QWORD);

	while (' ' == buf[*pos])
	(*pos)++;

	if ('\0' == buf[*pos])
	mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);

	return(ARGS_QWORD);
	}

	p = &buf[*pos];
	*v = mandoc_getarg(m->parse, &p, line, pos);

	return(ARGS_WORD);
	}

	/*
	* Check if the string consists only of space-separated closing
	* delimiters. This is a bit of a dance: the first must be a close
	* delimiter, but it may be followed by middle delimiters. Arbitrary
	* whitespace may separate these tokens.
	*/
	static int
	args_checkpunct(const char *buf, int i)
	{
	int j;
	char dbuf[DELIMSZ];
	enum mdelim d;

	/* First token must be a close-delimiter. */

	for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
	dbuf[j] = buf[i];

	if (DELIMSZ == j)
	return(0);

	dbuf[j] = '\0';
	if (DELIM_CLOSE != mdoc_isdelim(dbuf))
	return(0);

	while (' ' == buf[i])
	i++;

	/* Remaining must NOT be open/none. */

	while (buf[i]) {
	j = 0;
	while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
	dbuf[j++] = buf[i++];

	if (DELIMSZ == j)
	return(0);

	dbuf[j] = '\0';
	d = mdoc_isdelim(dbuf);
	if (DELIM_NONE == d \|\| DELIM_OPEN == d)
	return(0);

	while (' ' == buf[i])
	i++;
	}

	return('\0' == buf[i]);
	}

	static int
	argv_multi(struct mdoc *m, int line,
	struct mdoc_argv v, int pos, char *buf)
	{
	enum margserr ac;
	char *p;

	for (v->sz = 0; ; v->sz++) {
	if ('-' == buf[*pos])
	break;
	ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
	if (ARGS_ERROR == ac)
	return(0);
	else if (ARGS_EOLN == ac)
	break;

	if (0 == v->sz % MULTI_STEP)
	v->value = mandoc_realloc(v->value,
	(v->sz + MULTI_STEP) * sizeof(char *));

	v->value[(int)v->sz] = mandoc_strdup(p);
	}

	return(1);
	}

	static int
	argv_opt_single(struct mdoc *m, int line,
	struct mdoc_argv v, int pos, char *buf)
	{
	enum margserr ac;
	char *p;

	if ('-' == buf[*pos])
	return(1);

	ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
	if (ARGS_ERROR == ac)
	return(0);
	if (ARGS_EOLN == ac)
	return(1);

	v->sz = 1;
	v->value = mandoc_malloc(sizeof(char *));
	v->value[0] = mandoc_strdup(p);

	return(1);
	}

	static int
	argv_single(struct mdoc *m, int line,
	struct mdoc_argv v, int pos, char *buf)
	{
	int ppos;
	enum margserr ac;
	char *p;

	ppos = *pos;

	ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
	if (ARGS_EOLN == ac) {
	mdoc_pmsg(m, line, ppos, MANDOCERR_SYNTARGVCOUNT);
	return(0);
	} else if (ARGS_ERROR == ac)
	return(0);

	v->sz = 1;
	v->value = mandoc_malloc(sizeof(char *));
	v->value[0] = mandoc_strdup(p);

	return(1);
	}