First addition of -man macro support.

Abstraction of mdoc.

1 files changed, 0 insertions, 1446 deletions

diff --git a/macro.c b/macro.c
deleted file mode 100644
index 830b5e87..00000000
--- a/macro.c
+++ /dev/null
@@ -1,1446 +0,0 @@
-/* $Id$ */
-/*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
- *
- * 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.
- */
-#include <assert.h>
-#include <ctype.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "private.h"
-
-/*
- * This has scanning/parsing routines, each of which extract a macro and
- * its arguments and parameters, then know how to progress to the next
- * macro. 
- */
-
-/* FIXME: .Fl, .Ar, .Cd handling of `|'. */
-
-enum	mwarn {
-	WIMPBRK,
-	WMACPARM,
-	WOBS
-};
-
-enum	merr {
-	EOPEN,
-	EQUOT,
-	ENOCTX,
-	ENOPARMS
-};
-
-#define	REWIND_REWIND	(1 << 0)
-#define	REWIND_NOHALT	(1 << 1)
-#define	REWIND_HALT	(1 << 2)
-
-static	int	  obsolete(MACRO_PROT_ARGS);
-static	int	  blk_part_exp(MACRO_PROT_ARGS);
-static	int	  in_line_eoln(MACRO_PROT_ARGS);
-static	int	  in_line_argn(MACRO_PROT_ARGS);
-static	int	  in_line(MACRO_PROT_ARGS);
-static	int	  blk_full(MACRO_PROT_ARGS);
-static	int	  blk_exp_close(MACRO_PROT_ARGS);
-static	int	  blk_part_imp(MACRO_PROT_ARGS);
-
-static	int	  phrase(struct mdoc *, int, int, char *);
-static	int	  rew_dohalt(int, enum mdoc_type, 
-			const struct mdoc_node *);
-static	int	  rew_alt(int);
-static	int	  rew_dobreak(int, const struct mdoc_node *);
-static	int	  rew_elem(struct mdoc *, int);
-static	int	  rew_impblock(struct mdoc *, int, int, int);
-static	int	  rew_expblock(struct mdoc *, int, int, int);
-static	int	  rew_subblock(enum mdoc_type, 
-			struct mdoc *, int, int, int);
-static	int	  rew_last(struct mdoc *, struct mdoc_node *);
-static	int	  append_delims(struct mdoc *, int, int *, char *);
-static	int	  lookup(struct mdoc *, int, int, int, const char *);
-static	int	  pwarn(struct mdoc *, int, int, enum mwarn);
-static	int	  perr(struct mdoc *, int, int, enum merr);
-static	int	  swarn(struct mdoc *, enum mdoc_type, int, int, 
-			const struct mdoc_node *);
-
-#define	nerr(m, n, t) perr((m), (n)->line, (n)->pos, (t))
-
-/* Central table of library: who gets parsed how. */
-
-const	struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
-	{ NULL, 0 }, /* \" */
-	{ in_line_eoln, MDOC_PROLOGUE }, /* Dd */
-	{ in_line_eoln, MDOC_PROLOGUE }, /* Dt */
-	{ in_line_eoln, MDOC_PROLOGUE }, /* Os */
-	{ blk_full, 0 }, /* Sh */
-	{ blk_full, 0 }, /* Ss */ 
-	{ in_line, 0 }, /* Pp */ 
-	{ blk_part_imp, MDOC_PARSED }, /* D1 */
-	{ blk_part_imp, MDOC_PARSED }, /* Dl */
-	{ blk_full, MDOC_EXPLICIT }, /* Bd */
-	{ blk_exp_close, MDOC_EXPLICIT }, /* Ed */
-	{ blk_full, MDOC_EXPLICIT }, /* Bl */
-	{ blk_exp_close, MDOC_EXPLICIT }, /* El */
-	{ blk_full, MDOC_PARSED }, /* It */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */ 
-	{ in_line, MDOC_PARSED }, /* An */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
-	{ in_line_eoln, MDOC_CALLABLE }, /* Cd */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */ 
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */ 
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */ 
-	{ in_line_eoln, 0 }, /* Ex */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */ 
-	{ in_line_eoln, 0 }, /* Fd */ 
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */ 
-	{ in_line, MDOC_PARSED }, /* Ft */ 
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */ 
-	{ in_line_eoln, 0 }, /* In */ 
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
-	{ in_line_eoln, 0 }, /* Nd */ 
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */ 
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
-	{ obsolete, 0 }, /* Ot */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
-	{ in_line_eoln, 0 }, /* Rv */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */ 
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */ 
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
-	{ in_line_eoln, 0 }, /* %A */
-	{ in_line_eoln, 0 }, /* %B */
-	{ in_line_eoln, 0 }, /* %D */
-	{ in_line_eoln, 0 }, /* %I */
-	{ in_line_eoln, 0 }, /* %J */
-	{ in_line_eoln, 0 }, /* %N */
-	{ in_line_eoln, 0 }, /* %O */
-	{ in_line_eoln, 0 }, /* %P */
-	{ in_line_eoln, 0 }, /* %R */
-	{ in_line_eoln, 0 }, /* %T */
-	{ in_line_eoln, 0 }, /* %V */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
-	{ blk_full, MDOC_EXPLICIT }, /* Bf */ 
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bo */
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
-	{ in_line_eoln, 0 }, /* Db */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
-	{ blk_exp_close, MDOC_EXPLICIT }, /* Ef */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Em */ 
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
-	{ in_line, MDOC_PARSED }, /* Ms */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* No */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ns */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
-	{ in_line_argn, MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
-	{ blk_exp_close, MDOC_EXPLICIT }, /* Re */
-	{ blk_full, MDOC_EXPLICIT }, /* Rs */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* So */
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */
-	{ in_line_eoln, 0 }, /* Sm */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
-	{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ux */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
-	{ blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */ 
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Fc */ 
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
-	{ blk_full, MDOC_EXPLICIT }, /* Bk */
-	{ blk_exp_close, MDOC_EXPLICIT }, /* Ek */
-	{ in_line_eoln, 0 }, /* Bt */
-	{ in_line_eoln, 0 }, /* Hf */
-	{ obsolete, 0 }, /* Fr */
-	{ in_line_eoln, 0 }, /* Ud */
-	{ in_line_eoln, 0 }, /* Lb */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ap */
-	{ in_line, 0 }, /* Lp */ 
-	{ in_line, MDOC_PARSED }, /* Lk */ 
-	{ in_line, MDOC_PARSED }, /* Mt */ 
-	{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Brq */
-	{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bro */
-	{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Brc */
-	{ in_line_eoln, 0 }, /* %C */
-	{ obsolete, 0 }, /* Es */
-	{ obsolete, 0 }, /* En */
-	{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
-	{ in_line_eoln, 0 }, /* %Q */
-};
-
-const	struct mdoc_macro * const mdoc_macros = __mdoc_macros;
-
-
-static int
-perr(struct mdoc *mdoc, int line, int pos, enum merr type)
-{
-	char		*p;
-
-	p = NULL;
-	switch (type) {
-	case (EOPEN):
-		p = "explicit scope still open on exit";
-		break;
-	case (EQUOT):
-		p = "unterminated quotation";
-		break;
-	case (ENOCTX):
-		p = "closure has no prior context";
-		break;
-	case (ENOPARMS):
-		p = "unexpect line arguments";
-		break;
-	}
-	assert(p);
-	return(mdoc_perr(mdoc, line, pos, p));
-}
-
-
-static int
-pwarn(struct mdoc *mdoc, int line, int pos, enum mwarn type)
-{
-	char		*p;
-
-	p = NULL;
-	switch (type) {
-	case (WIMPBRK):
-		p = "crufty end-of-line scope violation";
-		break;
-	case (WMACPARM):
-		p = "macro-like parameter";
-		break;
-	case (WOBS):
-		p = "macro marked obsolete";
-		break;
-	}
-	assert(p);
-	return(mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX, p));
-}
-
-
-static int
-swarn(struct mdoc *mdoc, enum mdoc_type type, 
-		int line, int pos, const struct mdoc_node *p)
-{
-	const char	*n, *t, *tt;
-
-	n = t = "<root>";
-	tt = "block";
-
-	switch (type) {
-	case (MDOC_BODY):
-		tt = "multi-line";
-		break;
-	case (MDOC_HEAD):
-		tt = "line";
-		break;
-	default:
-		break;
-	}
-
-	switch (p->type) {
-	case (MDOC_BLOCK):
-		n = mdoc_macronames[p->tok];
-		t = "block";
-		break;
-	case (MDOC_BODY):
-		n = mdoc_macronames[p->tok];
-		t = "multi-line";
-		break;
-	case (MDOC_HEAD):
-		n = mdoc_macronames[p->tok];
-		t = "line";
-		break;
-	default:
-		break;
-	}
-
-	if ( ! (MDOC_IGN_SCOPE & mdoc->pflags))
-		return(mdoc_perr(mdoc, line, pos, 
-				"%s scope breaks %s scope of %s", 
-				tt, t, n));
-	return(mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
-				"%s scope breaks %s scope of %s", 
-				tt, t, n));
-}
-
-
-/*
- * This is called at the end of parsing.  It must traverse up the tree,
- * closing out open [implicit] scopes.  Obviously, open explicit scopes
- * are errors.
- */
-int
-macro_end(struct mdoc *mdoc)
-{
-	struct mdoc_node *n;
-
-	assert(mdoc->first);
-	assert(mdoc->last);
-
-	/* Scan for open explicit scopes. */
-
-	n = MDOC_VALID & mdoc->last->flags ?
-		mdoc->last->parent : mdoc->last;
-
-	for ( ; n; n = n->parent) {
-		if (MDOC_BLOCK != n->type)
-			continue;
-		if ( ! (MDOC_EXPLICIT & mdoc_macros[n->tok].flags))
-			continue;
-		return(nerr(mdoc, n, EOPEN));
-	}
-
-	return(rew_last(mdoc, mdoc->first));
-}
-
-static int
-lookup(struct mdoc *mdoc, int line, int pos, int from, const char *p)
-{
-	int		 res;
-
-	res = mdoc_tokhash_find(mdoc->htab, p);
-	if (MDOC_PARSED & mdoc_macros[from].flags)
-		return(res);
-	if (MDOC_MAX == res)
-		return(res);
-	if ( ! pwarn(mdoc, line, pos, WMACPARM))
-		return(-1);
-	return(MDOC_MAX);
-}
-
-
-static int
-rew_last(struct mdoc *mdoc, struct mdoc_node *to)
-{
-
-	assert(to);
-	mdoc->next = MDOC_NEXT_SIBLING;
-
-	/* LINTED */
-	while (mdoc->last != to) {
-		if ( ! mdoc_valid_post(mdoc))
-			return(0);
-		if ( ! mdoc_action_post(mdoc))
-			return(0);
-		mdoc->last = mdoc->last->parent;
-		assert(mdoc->last);
-	}
-
-	if ( ! mdoc_valid_post(mdoc))
-		return(0);
-	return(mdoc_action_post(mdoc));
-}
-
-
-static int
-rew_alt(int tok)
-{
-	switch (tok) {
-	case (MDOC_Ac):
-		return(MDOC_Ao);
-	case (MDOC_Bc):
-		return(MDOC_Bo);
-	case (MDOC_Brc):
-		return(MDOC_Bro);
-	case (MDOC_Dc):
-		return(MDOC_Do);
-	case (MDOC_Ec):
-		return(MDOC_Eo);
-	case (MDOC_Ed):
-		return(MDOC_Bd);
-	case (MDOC_Ef):
-		return(MDOC_Bf);
-	case (MDOC_Ek):
-		return(MDOC_Bk);
-	case (MDOC_El):
-		return(MDOC_Bl);
-	case (MDOC_Fc):
-		return(MDOC_Fo);
-	case (MDOC_Oc):
-		return(MDOC_Oo);
-	case (MDOC_Pc):
-		return(MDOC_Po);
-	case (MDOC_Qc):
-		return(MDOC_Qo);
-	case (MDOC_Re):
-		return(MDOC_Rs);
-	case (MDOC_Sc):
-		return(MDOC_So);
-	case (MDOC_Xc):
-		return(MDOC_Xo);
-	default:
-		break;
-	}
-	abort();
-	/* NOTREACHED */
-}
-
-
-/* 
- * Rewind rules.  This indicates whether to stop rewinding
- * (REWIND_HALT) without touching our current scope, stop rewinding and
- * close our current scope (REWIND_REWIND), or continue (REWIND_NOHALT).
- * The scope-closing and so on occurs in the various rew_* routines.
- */
-static int 
-rew_dohalt(int tok, enum mdoc_type type, const struct mdoc_node *p)
-{
-
-	if (MDOC_ROOT == p->type)
-		return(REWIND_HALT);
-	if (MDOC_VALID & p->flags)
-		return(REWIND_NOHALT);
-
-	switch (tok) {
-	case (MDOC_Aq):
-		/* FALLTHROUGH */
-	case (MDOC_Bq):
-		/* FALLTHROUGH */
-	case (MDOC_Brq):
-		/* FALLTHROUGH */
-	case (MDOC_D1):
-		/* FALLTHROUGH */
-	case (MDOC_Dl):
-		/* FALLTHROUGH */
-	case (MDOC_Dq):
-		/* FALLTHROUGH */
-	case (MDOC_Op):
-		/* FALLTHROUGH */
-	case (MDOC_Pq):
-		/* FALLTHROUGH */
-	case (MDOC_Ql):
-		/* FALLTHROUGH */
-	case (MDOC_Qq):
-		/* FALLTHROUGH */
-	case (MDOC_Sq):
-		assert(MDOC_HEAD != type);
-		assert(MDOC_TAIL != type);
-		if (type == p->type && tok == p->tok)
-			return(REWIND_REWIND);
-		break;
-	case (MDOC_It):
-		assert(MDOC_TAIL != type);
-		if (type == p->type && tok == p->tok)
-			return(REWIND_REWIND);
-		if (MDOC_BODY == p->type && MDOC_Bl == p->tok)
-			return(REWIND_HALT);
-		break;
-	case (MDOC_Sh):
-		if (type == p->type && tok == p->tok)
-			return(REWIND_REWIND);
-		break;
-	case (MDOC_Ss):
-		assert(MDOC_TAIL != type);
-		if (type == p->type && tok == p->tok)
-			return(REWIND_REWIND);
-		if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
-			return(REWIND_HALT);
-		break;
-	case (MDOC_Ao):
-		/* FALLTHROUGH */
-	case (MDOC_Bd):
-		/* FALLTHROUGH */
-	case (MDOC_Bf):
-		/* FALLTHROUGH */
-	case (MDOC_Bk):
-		/* FALLTHROUGH */
-	case (MDOC_Bl):
-		/* FALLTHROUGH */
-	case (MDOC_Bo):
-		/* FALLTHROUGH */
-	case (MDOC_Bro):
-		/* FALLTHROUGH */
-	case (MDOC_Do):
-		/* FALLTHROUGH */
-	case (MDOC_Eo):
-		/* FALLTHROUGH */
-	case (MDOC_Fo):
-		/* FALLTHROUGH */
-	case (MDOC_Oo):
-		/* FALLTHROUGH */
-	case (MDOC_Po):
-		/* FALLTHROUGH */
-	case (MDOC_Qo):
-		/* FALLTHROUGH */
-	case (MDOC_Rs):
-		/* FALLTHROUGH */
-	case (MDOC_So):
-		/* FALLTHROUGH */
-	case (MDOC_Xo):
-		if (type == p->type && tok == p->tok)
-			return(REWIND_REWIND);
-		break;
-
-	/* Multi-line explicit scope close. */
-	case (MDOC_Ac):
-		/* FALLTHROUGH */
-	case (MDOC_Bc):
-		/* FALLTHROUGH */
-	case (MDOC_Brc):
-		/* FALLTHROUGH */
-	case (MDOC_Dc):
-		/* FALLTHROUGH */
-	case (MDOC_Ec):
-		/* FALLTHROUGH */
-	case (MDOC_Ed):
-		/* FALLTHROUGH */
-	case (MDOC_Ek):
-		/* FALLTHROUGH */
-	case (MDOC_El):
-		/* FALLTHROUGH */
-	case (MDOC_Fc):
-		/* FALLTHROUGH */
-	case (MDOC_Ef):
-		/* FALLTHROUGH */
-	case (MDOC_Oc):
-		/* FALLTHROUGH */
-	case (MDOC_Pc):
-		/* FALLTHROUGH */
-	case (MDOC_Qc):
-		/* FALLTHROUGH */
-	case (MDOC_Re):
-		/* FALLTHROUGH */
-	case (MDOC_Sc):
-		/* FALLTHROUGH */
-	case (MDOC_Xc):
-		if (type == p->type && rew_alt(tok) == p->tok)
-			return(REWIND_REWIND);
-		break;
-	default:
-		abort();
-		/* NOTREACHED */
-	}
-
-	return(REWIND_NOHALT);
-}
-
-
-/*
- * See if we can break an encountered scope (the rew_dohalt has returned
- * REWIND_NOHALT). 
- */
-static int
-rew_dobreak(int tok, const struct mdoc_node *p)
-{
-
-	assert(MDOC_ROOT != p->type);
-	if (MDOC_ELEM == p->type)
-		return(1);
-	if (MDOC_TEXT == p->type)
-		return(1);
-	if (MDOC_VALID & p->flags)
-		return(1);
-
-	switch (tok) {
-	case (MDOC_It):
-		return(MDOC_It == p->tok);
-	case (MDOC_Ss):
-		return(MDOC_Ss == p->tok);
-	case (MDOC_Sh):
-		if (MDOC_Ss == p->tok)
-			return(1);
-		return(MDOC_Sh == p->tok);
-	case (MDOC_El):
-		if (MDOC_It == p->tok)
-			return(1);
-		break;
-	case (MDOC_Oc):
-		/* XXX - experimental! */
-		if (MDOC_Op == p->tok)
-			return(1);
-		break;
-	default:
-		break;
-	}
-
-	if (MDOC_EXPLICIT & mdoc_macros[tok].flags) 
-		return(p->tok == rew_alt(tok));
-	else if (MDOC_BLOCK == p->type)
-		return(1);
-
-	return(tok == p->tok);
-}
-
-
-static int
-rew_elem(struct mdoc *mdoc, int tok)
-{
-	struct mdoc_node *n;
-
-	n = mdoc->last;
-	if (MDOC_ELEM != n->type)
-		n = n->parent;
-	assert(MDOC_ELEM == n->type);
-	assert(tok == n->tok);
-
-	return(rew_last(mdoc, n));
-}
-
-
-static int
-rew_subblock(enum mdoc_type type, struct mdoc *mdoc, 
-		int tok, int line, int ppos)
-{
-	struct mdoc_node *n;
-	int		  c;
-
-	/* LINTED */
-	for (n = mdoc->last; n; n = n->parent) {
-		c = rew_dohalt(tok, type, n);
-		if (REWIND_HALT == c)
-			return(1);
-		if (REWIND_REWIND == c)
-			break;
-		else if (rew_dobreak(tok, n))
-			continue;
-		if ( ! swarn(mdoc, type, line, ppos, n))
-			return(0);
-	}
-
-	assert(n);
-	return(rew_last(mdoc, n));
-}
-
-
-static int
-rew_expblock(struct mdoc *mdoc, int tok, int line, int ppos)
-{
-	struct mdoc_node *n;
-	int		  c;
-
-	/* LINTED */
-	for (n = mdoc->last; n; n = n->parent) {
-		c = rew_dohalt(tok, MDOC_BLOCK, n);
-		if (REWIND_HALT == c)
-			return(perr(mdoc, line, ppos, ENOCTX));
-		if (REWIND_REWIND == c)
-			break;
-		else if (rew_dobreak(tok, n))
-			continue;
-		if ( ! swarn(mdoc, MDOC_BLOCK, line, ppos, n))
-			return(0);
-	}
-
-	assert(n);
-	return(rew_last(mdoc, n));
-}
-
-
-static int
-rew_impblock(struct mdoc *mdoc, int tok, int line, int ppos)
-{
-	struct mdoc_node *n;
-	int		  c;
-
-	/* LINTED */
-	for (n = mdoc->last; n; n = n->parent) {
-		c = rew_dohalt(tok, MDOC_BLOCK, n);
-		if (REWIND_HALT == c)
-			return(1);
-		else if (REWIND_REWIND == c)
-			break;
-		else if (rew_dobreak(tok, n))
-			continue;
-		if ( ! swarn(mdoc, MDOC_BLOCK, line, ppos, n))
-			return(0);
-	}
-
-	assert(n);
-	return(rew_last(mdoc, n));
-}
-
-
-static int
-append_delims(struct mdoc *mdoc, int line, int *pos, char *buf)
-{
-	int		 c, lastarg;
-	char		*p;
-
-	if (0 == buf[*pos])
-		return(1);
-
-	for (;;) {
-		lastarg = *pos;
-		c = mdoc_args(mdoc, line, pos, buf, 0, &p);
-		assert(ARGS_PHRASE != c);
-
-		if (ARGS_ERROR == c)
-			return(0);
-		else if (ARGS_EOLN == c)
-			break;
-		assert(mdoc_isdelim(p));
-		if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
-			return(0);
-		mdoc->next = MDOC_NEXT_SIBLING;
-	}
-
-	return(1);
-}
-
-
-/*
- * Close out block partial/full explicit.  
- */
-static int
-blk_exp_close(MACRO_PROT_ARGS)
-{
-	int	 	 j, c, lastarg, maxargs, flushed;
-	char		*p;
-
-	switch (tok) {
-	case (MDOC_Ec):
-		maxargs = 1;
-		break;
-	default:
-		maxargs = 0;
-		break;
-	}
-
-	if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
-		if (0 == buf[*pos]) {
-			if ( ! rew_subblock(MDOC_BODY, mdoc, 
-						tok, line, ppos))
-				return(0);
-			return(rew_expblock(mdoc, tok, line, ppos));
-		}
-		return(perr(mdoc, line, ppos, ENOPARMS));
-	}
-
-	if ( ! rew_subblock(MDOC_BODY, mdoc, tok, line, ppos))
-		return(0);
-
-	if (maxargs > 0) {
-		if ( ! mdoc_tail_alloc(mdoc, line, 
-					ppos, rew_alt(tok)))
-			return(0);
-		mdoc->next = MDOC_NEXT_CHILD;
-	}
-
-	for (lastarg = ppos, flushed = j = 0; ; j++) {
-		lastarg = *pos;
-
-		if (j == maxargs && ! flushed) {
-			if ( ! rew_expblock(mdoc, tok, line, ppos))
-				return(0);
-			flushed = 1;
-		}
-
-		c = mdoc_args(mdoc, line, pos, buf, tok, &p);
-
-		if (ARGS_ERROR == c)
-			return(0);
-		if (ARGS_PUNCT == c)
-			break;
-		if (ARGS_EOLN == c)
-			break;
-
-		if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
-			return(0);
-		else if (MDOC_MAX != c) {
-			if ( ! flushed) {
-				if ( ! rew_expblock(mdoc, tok, 
-							line, ppos))
-					return(0);
-				flushed = 1;
-			}
-			if ( ! mdoc_macro(mdoc, c, line, lastarg, pos, buf))
-				return(0);
-			break;
-		} 
-
-		if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
-			return(0);
-		mdoc->next = MDOC_NEXT_SIBLING;
-	}
-
-	if ( ! flushed && ! rew_expblock(mdoc, tok, line, ppos))
-		return(0);
-
-	if (ppos > 1)
-		return(1);
-	return(append_delims(mdoc, line, pos, buf));
-}
-
-
-/*
- * In-line macros where reserved words cause scope close-reopen.
- */
-static int
-in_line(MACRO_PROT_ARGS)
-{
-	int		  la, lastpunct, c, w;
-	struct mdoc_arg	 *arg;
-	char		 *p;
-
-	for (la = ppos, arg = NULL;; ) {
-		la = *pos;
-		c = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
-
-		if (ARGV_WORD == c) {
-			*pos = la;
-			break;
-		} 
-
-		if (ARGV_EOLN == c)
-			break;
-		if (ARGV_ARG == c)
-			continue;
-
-		mdoc_argv_free(arg);
-		return(0);
-	}
-
-	if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
-		return(0);
-	mdoc->next = MDOC_NEXT_CHILD;
-
-	for (lastpunct = 0;; ) {
-		la = *pos;
-		w = mdoc_args(mdoc, line, pos, buf, tok, &p);
-
-		if (ARGS_ERROR == w)
-			return(0);
-		if (ARGS_EOLN == w)
-			break;
-		if (ARGS_PUNCT == w)
-			break;
-
-		/* Quoted words shouldn't be looked-up. */
-
-		c = ARGS_QWORD == w ? MDOC_MAX :
-			lookup(mdoc, line, la, tok, p);
-
-		/* MDOC_MAX (not a macro) or -1 (error). */
-
-		if (MDOC_MAX != c && -1 != c) {
-			if (0 == lastpunct && ! rew_elem(mdoc, tok))
-				return(0);
-			c = mdoc_macro(mdoc, c, line, la, pos, buf);
-			if (0 == c)
-				return(0);
-			if (ppos > 1)
-				return(1);
-			return(append_delims(mdoc, line, pos, buf));
-		} else if (-1 == c)
-			return(0);
-
-		/* Non-quote-enclosed punctuation. */
-
-		if (ARGS_QWORD != w && mdoc_isdelim(p)) {
-			if (0 == lastpunct && ! rew_elem(mdoc, tok))
-				return(0);
-			lastpunct = 1;
-		} else if (lastpunct) {
-			c = mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
-
-			if (0 == c)
-				return(0);
-
-			mdoc->next = MDOC_NEXT_CHILD;
-			lastpunct = 0;
-		}
-
-		if ( ! mdoc_word_alloc(mdoc, line, la, p))
-			return(0);
-		mdoc->next = MDOC_NEXT_SIBLING;
-	}
-
-	if (0 == lastpunct && ! rew_elem(mdoc, tok))
-		return(0);
-	if (ppos > 1)
-		return(1);
-	return(append_delims(mdoc, line, pos, buf));
-}
-
-
-/*
- * Block full-explicit and full-implicit.
- */
-static int
-blk_full(MACRO_PROT_ARGS)
-{
-	int		  c, lastarg, reopen;
-	struct mdoc_arg	 *arg;
-	char		 *p;
-
-	if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
-		if ( ! rew_subblock(MDOC_BODY, mdoc, 
-					tok, line, ppos))
-			return(0);
-		if ( ! rew_impblock(mdoc, tok, line, ppos))
-			return(0);
-	}
-
-	for (arg = NULL;; ) {
-		lastarg = *pos;
-		c = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
-
-		if (ARGV_WORD == c) {
-			*pos = lastarg;
-			break;
-		} 
-
-		if (ARGV_EOLN == c)
-			break;
-		if (ARGV_ARG == c)
-			continue;
-
-		mdoc_argv_free(arg);
-		return(0);
-	}
-
-	if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, arg))
-		return(0);
-	mdoc->next = MDOC_NEXT_CHILD;
-
-	if (0 == buf[*pos]) {
-		if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
-			return(0);
-		if ( ! rew_subblock(MDOC_HEAD, mdoc, 
-					tok, line, ppos))
-			return(0);
-		if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
-			return(0);
-		mdoc->next = MDOC_NEXT_CHILD;
-		return(1);
-	}
-
-	if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
-		return(0);
-	mdoc->next = MDOC_NEXT_CHILD;
-
-	for (reopen = 0;; ) {
-		lastarg = *pos;
-		c = mdoc_args(mdoc, line, pos, buf, tok, &p);
-
-		if (ARGS_ERROR == c)
-			return(0);
-		if (ARGS_EOLN == c)
-			break;
-		if (ARGS_PHRASE == c) {
-			if (reopen && ! mdoc_head_alloc
-					(mdoc, line, ppos, tok))
-				return(0);
-			mdoc->next = MDOC_NEXT_CHILD;
-			/*
-			 * Phrases are self-contained macro phrases used
-			 * in the columnar output of a macro. They need
-			 * special handling.
-			 */
-			if ( ! phrase(mdoc, line, lastarg, buf))
-				return(0);
-			if ( ! rew_subblock(MDOC_HEAD, mdoc, 
-						tok, line, ppos))
-				return(0);
-
-			reopen = 1;
-			continue;
-		}
-
-		if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
-			return(0);
-
-		if (MDOC_MAX == c) {
-			if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
-				return(0);
-			mdoc->next = MDOC_NEXT_SIBLING;
-			continue;
-		} 
-
-		if ( ! mdoc_macro(mdoc, c, line, lastarg, pos, buf))
-			return(0);
-		break;
-	}
-	
-	if (1 == ppos && ! append_delims(mdoc, line, pos, buf))
-		return(0);
-	if ( ! rew_subblock(MDOC_HEAD, mdoc, tok, line, ppos))
-		return(0);
-
-	if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
-		return(0);
-	mdoc->next = MDOC_NEXT_CHILD;
-
-	return(1);
-}
-
-
-/*
- * Block partial-imnplicit scope.
- */
-static int
-blk_part_imp(MACRO_PROT_ARGS)
-{
-	int		  lastarg, c;
-	char		 *p;
-	struct mdoc_node *blk, *body, *n;
-
-	if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, NULL))
-		return(0);
-	mdoc->next = MDOC_NEXT_CHILD;
-	blk = mdoc->last;
-
-	if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
-		return(0);
-	mdoc->next = MDOC_NEXT_SIBLING;
-
-	if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
-		return(0);
-	mdoc->next = MDOC_NEXT_CHILD;
-	body = mdoc->last;
-
-	/* XXX - no known argument macros. */
-
-	for (lastarg = ppos;; ) {
-		lastarg = *pos;
-		c = mdoc_args(mdoc, line, pos, buf, tok, &p);
-		assert(ARGS_PHRASE != c);
-
-		if (ARGS_ERROR == c)
-			return(0);
-		if (ARGS_PUNCT == c)
-			break;
-		if (ARGS_EOLN == c)
-			break;
-
-		if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
-			return(0);
-		else if (MDOC_MAX == c) {
-			if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
-				return(0);
-			mdoc->next = MDOC_NEXT_SIBLING;
-			continue;
-		} 
-
-		if ( ! mdoc_macro(mdoc, c, line, lastarg, pos, buf))
-			return(0);
-		break;
-	}
-
-	/*
-	 * Since we know what our context is, we can rewind directly to
-	 * it.  This allows us to accomodate for our scope being
-	 * violated by another token.
-	 */
-
-	for (n = mdoc->last; n; n = n->parent)
-		if (body == n)
-			break;
-
-	if (NULL == n && ! pwarn(mdoc, body->line, body->pos, WIMPBRK))
-			return(0);
-
-	if (n && ! rew_last(mdoc, body))
-		return(0);
-
-	if (1 == ppos && ! append_delims(mdoc, line, pos, buf))
-		return(0);
-
-	if (n && ! rew_last(mdoc, blk))
-		return(0);
-
-	return(1);
-}
-
-
-/*
- * Block partial-explicit macros.
- */
-static int
-blk_part_exp(MACRO_PROT_ARGS)
-{
-	int		  lastarg, flushed, j, c, maxargs;
-	char		 *p;
-
-	lastarg = ppos;
-	flushed = 0;
-
-	/*
-	 * Number of arguments (head arguments).  Only `Eo' has these,
-	 */
-
-	switch (tok) {
-	case (MDOC_Eo):
-		maxargs = 1;
-		break;
-	default:
-		maxargs = 0;
-		break;
-	}
-
-	if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, NULL))
-		return(0); 
-	mdoc->next = MDOC_NEXT_CHILD;
-
-	if (0 == maxargs) {
-		if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
-			return(0);
-		if ( ! rew_subblock(MDOC_HEAD, mdoc, 
-					tok, line, ppos))
-			return(0);
-		if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
-			return(0);
-		flushed = 1;
-	} else if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
-		return(0);
-
-	mdoc->next = MDOC_NEXT_CHILD;
-
-	for (j = 0; ; j++) {
-		lastarg = *pos;
-		if (j == maxargs && ! flushed) {
-			if ( ! rew_subblock(MDOC_HEAD, mdoc, 
-						tok, line, ppos))
-				return(0);
-			flushed = 1;
-			if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
-				return(0);
-			mdoc->next = MDOC_NEXT_CHILD;
-		}
-
-		c = mdoc_args(mdoc, line, pos, buf, tok, &p);
-		assert(ARGS_PHRASE != c);
-
-		if (ARGS_ERROR == c)
-			return(0);
-		if (ARGS_PUNCT == c)
-			break;
-		if (ARGS_EOLN == c)
-			break;
-
-		if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
-			return(0);
-		else if (MDOC_MAX != c) {
-			if ( ! flushed) {
-				if ( ! rew_subblock(MDOC_HEAD, mdoc, 
-							tok, line, ppos))
-					return(0);
-				flushed = 1;
-				if ( ! mdoc_body_alloc(mdoc, line, 
-							ppos, tok))
-					return(0);
-				mdoc->next = MDOC_NEXT_CHILD;
-			}
-			if ( ! mdoc_macro(mdoc, c, line, lastarg, 
-						pos, buf))
-				return(0);
-			break;
-		}
-
-		if ( ! flushed && mdoc_isdelim(p)) {
-			if ( ! rew_subblock(MDOC_HEAD, mdoc, 
-						tok, line, ppos))
-				return(0);
-			flushed = 1;
-			if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
-				return(0);
-			mdoc->next = MDOC_NEXT_CHILD;
-		}
-	
-		if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
-			return(0);
-		mdoc->next = MDOC_NEXT_SIBLING;
-	}
-
-	if ( ! flushed) {
-		if ( ! rew_subblock(MDOC_HEAD, mdoc, tok, line, ppos))
-			return(0);
-		if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
-			return(0);
-		mdoc->next = MDOC_NEXT_CHILD;
-	}
-
-	if (ppos > 1)
-		return(1);
-	return(append_delims(mdoc, line, pos, buf));
-}
-
-
-/*
- * In-line macros where reserved words signal closure of the macro.
- * Macros also have a fixed number of arguments.
- */
-static int
-in_line_argn(MACRO_PROT_ARGS)
-{
-	int		  lastarg, flushed, j, c, maxargs;
-	struct mdoc_arg	 *arg;
-	char		 *p;
-
-	
-	/* 
-	 * Fixed maximum arguments per macro.  Some of these have none
-	 * and close as soon as the invocation is parsed.
-	 */
-
-	switch (tok) {
-	case (MDOC_Ap):
-		/* FALLTHROUGH */
-	case (MDOC_No):
-		/* FALLTHROUGH */
-	case (MDOC_Ns):
-		/* FALLTHROUGH */
-	case (MDOC_Ux):
-		maxargs = 0;
-		break;
-	default:
-		maxargs = 1;
-		break;
-	}
-
-	for (lastarg = ppos, arg = NULL;; ) {
-		lastarg = *pos;
-		c = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
-
-		if (ARGV_WORD == c) {
-			*pos = lastarg;
-			break;
-		} 
-
-		if (ARGV_EOLN == c)
-			break;
-		if (ARGV_ARG == c)
-			continue;
-
-		mdoc_argv_free(arg);
-		return(0);
-	}
-
-	if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
-		return(0);
-	mdoc->next = MDOC_NEXT_CHILD;
-
-	for (flushed = j = 0; ; j++) {
-		lastarg = *pos;
-
-		if (j == maxargs && ! flushed) {
-			if ( ! rew_elem(mdoc, tok))
-				return(0);
-			flushed = 1;
-		}
-
-		c = mdoc_args(mdoc, line, pos, buf, tok, &p);
-
-		if (ARGS_ERROR == c)
-			return(0);
-		if (ARGS_PUNCT == c)
-			break;
-		if (ARGS_EOLN == c)
-			break;
-
-		if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
-			return(0);
-		else if (MDOC_MAX != c) {
-			if ( ! flushed && ! rew_elem(mdoc, tok))
-				return(0);
-			flushed = 1;
-			if ( ! mdoc_macro(mdoc, c, line, lastarg, pos, buf))
-				return(0);
-			break;
-		}
-
-		if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
-				! flushed && mdoc_isdelim(p)) {
-			if ( ! rew_elem(mdoc, tok))
-				return(0);
-			flushed = 1;
-		}
-	
-		if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
-			return(0);
-		mdoc->next = MDOC_NEXT_SIBLING;
-	}
-
-	if ( ! flushed && ! rew_elem(mdoc, tok))
-		return(0);
-
-	if (ppos > 1)
-		return(1);
-	return(append_delims(mdoc, line, pos, buf));
-}
-
-
-/*
- * In-line macro that spans an entire line.  May be callable, but has no
- * subsequent parsed arguments.
- */
-static int
-in_line_eoln(MACRO_PROT_ARGS)
-{
-	int		  c, w, la;
-	struct mdoc_arg	 *arg;
-	char		 *p;
-
-	assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
-
-	arg = NULL;
-
-	for (;;) {
-		la = *pos;
-		c = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
-
-		if (ARGV_WORD == c) {
-			*pos = la;
-			break;
-		}
-		if (ARGV_EOLN == c) 
-			break;
-		if (ARGV_ARG == c)
-			continue;
-
-		mdoc_argv_free(arg);
-		return(0);
-	}
-
-	if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
-		return(0);
-
-	mdoc->next = MDOC_NEXT_CHILD;
-
-	for (;;) {
-		la = *pos;
-		w = mdoc_args(mdoc, line, pos, buf, tok, &p);
-
-		if (ARGS_ERROR == w)
-			return(0);
-		if (ARGS_EOLN == w)
-			break;
-
-		c = ARGS_QWORD == w ? MDOC_MAX :
-			lookup(mdoc, line, la, tok, p);
-
-		if (MDOC_MAX != c && -1 != c) {
-			if ( ! rew_elem(mdoc, tok))
-				return(0);
-			return(mdoc_macro(mdoc, c, line, la, pos, buf));
-		} else if (-1 == c)
-			return(0);
-
-		if ( ! mdoc_word_alloc(mdoc, line, la, p))
-			return(0);
-		mdoc->next = MDOC_NEXT_SIBLING;
-	}
-
-	return(rew_elem(mdoc, tok));
-}
-
-
-/* ARGSUSED */
-static int
-obsolete(MACRO_PROT_ARGS)
-{
-
-	return(pwarn(mdoc, line, ppos, WOBS));
-}
-
-
-static int
-phrase(struct mdoc *mdoc, int line, int ppos, char *buf)
-{
-	int		 i, la, c, quoted;
-
-	/*
-	 * Parse over words in a phrase.  We have to handle this
-	 * specially because we assume no calling context -- in normal
-	 * circumstances, we switch argument parsing based on whether
-	 * the parent macro accepts quotes, tabs, etc.  Here, anything
-	 * goes.
-	 */
-
-	for (i = ppos; buf[i]; ) {
-		assert(' ' != buf[i]);
-		la = i;
-		quoted = 0;
-
-		/* 
-		 * Read to next token.  If quoted (check not escaped),
-		 * scan ahead to next unescaped quote.  If not quoted or
-		 * escape-quoted, then scan ahead to next space.
-		 */
-
-		if ((i && '\"' == buf[i] && '\\' != buf[i - 1]) || 
-				(0 == i && '\"' == buf[i])) {
-			for (la = ++i; buf[i]; i++) 
-				if ('\"' != buf[i])
-					continue;
-				else if ('\\' != buf[i - 1])
-					break;
-			if (0 == buf[i]) 
-				return(perr(mdoc, line, la, EQUOT));
-			quoted = 1;
-		} else
-			for ( ; buf[i]; i++)
-				if (i && ' ' == buf[i]) {
-					if ('\\' != buf[i - 1])
-						break;
-				} else if (' ' == buf[i])
-					break;
-
-		/* If not end-of-line, terminate argument. */
-
-		if (buf[i])
-			buf[i++] = 0;
-
-		/* Read to next argument. */
-
-		for ( ; buf[i] && ' ' == buf[i]; i++)
-			/* Spin. */ ;
-
-		/* 
-		 * If we're a non-quoted string, try to look up the
-		 * value as a macro and execute it, if found.
-		 */
-
-		c = quoted ? MDOC_MAX :
-			mdoc_tokhash_find(mdoc->htab, &buf[la]);
-
-		if (MDOC_MAX != c) {
-			if ( ! mdoc_macro(mdoc, c, line, la, &i, buf))
-				return(0);
-			return(append_delims(mdoc, line, &i, buf));
-		}
-
-		/* A regular word or quoted string. */
-
-		if ( ! mdoc_word_alloc(mdoc, line, la, &buf[la]))
-			return(0);
-		mdoc->next = MDOC_NEXT_SIBLING;
-	}
-
-	return(1);
-}