More file pruning.

1 files changed, 0 insertions, 1724 deletions

diff --git a/roff.c b/roff.c
deleted file mode 100644
index 68707b91..00000000
--- a/roff.c
+++ /dev/null
@@ -1,1724 +0,0 @@
-/* $Id$ */
-/*
- * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
- *
- * 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 <sys/param.h>
-#include <sys/types.h>
-
-#include <assert.h>
-#include <ctype.h>
-#include <err.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-
-#include "private.h"
-#include "roff.h"
-
-/* FIXME: First letters of quoted-text interpreted in rofffindtok. */
-/* FIXME: `No' not implemented. */
-/* TODO: warn if Pp occurs before/after Sh etc. (see mdoc.samples). */
-/* TODO: warn about empty lists. */
-/* TODO: (warn) some sections need specific elements. */
-/* TODO: (warn) NAME section has particular order. */
-/* TODO: macros with a set number of arguments? */
-/* FIXME: Bl -diag supposed to ignore callable children. */
-
-struct	roffnode {
-	int		  tok;		/* Token id. */
-	struct roffnode	 *parent;	/* Parent (or NULL). */
-};
-
-enum	rofferr {
-	ERR_ARGEQ1,			/* Macro requires arg == 1. */
-	ERR_ARGEQ0,			/* Macro requires arg == 0. */
-	ERR_ARGGE1,			/* Macro requires arg >= 1. */
-	ERR_ARGGE2,			/* Macro requires arg >= 2. */
-	ERR_ARGLEN,			/* Macro argument too long. */
-	ERR_BADARG,			/* Macro has bad arg. */
-	ERR_ARGMNY,			/* Too many macro arguments. */
-	ERR_NOTSUP,			/* Macro not supported. */
-	ERR_DEPREC,			/* Macro deprecated. */
-	ERR_PR_OOO,			/* Prelude macro bad order. */
-	ERR_PR_REP,			/* Prelude macro repeated. */
-	ERR_NOT_PR,			/* Not allowed in prelude. */
-	WRN_SECORD			/* Sections out-of-order. */
-};
-
-struct	rofftree {
-	struct roffnode	 *last;			/* Last parsed node. */
-	char		 *cur;			/* Line start. */
-	struct tm	  tm;			/* `Dd' results. */
-	char		  name[64];		/* `Nm' results. */
-	char		  os[64];		/* `Os' results. */
-	char		  title[64];		/* `Dt' results. */
-	enum roffmsec	  section;
-	enum roffvol	  volume;
-	struct roffcb	  cb;			/* Callbacks. */
-	void		 *arg;			/* Callbacks' arg. */
-	int		  csec;			/* Current section. */
-	int		  asec;			/* Thus-far sections. */
-	int		  literal;		/* Literal mode. */
-};
-
-static	struct roffnode	 *roffnode_new(int, struct rofftree *);
-static	void		  roffnode_free(struct rofftree *);
-static	int		  roff_warn(const struct rofftree *, 
-				const char *, char *, ...);
-static	int		  roff_warnp(const struct rofftree *, 
-				const char *, int, enum rofferr);
-static	int		  roff_err(const struct rofftree *, 
-				const char *, char *, ...);
-static	int		  roff_errp(const struct rofftree *, 
-				const char *, int, enum rofferr);
-static	int		  roffpurgepunct(struct rofftree *, char **);
-static	int		  roffscan(int, const int *);
-static	int		  rofffindtok(const char *);
-static	int		  rofffindarg(const char *);
-static	int		  rofffindcallable(const char *);
-static	int		  roffispunct(const char *);
-static	int		  roffchecksec(struct rofftree *, 
-				const char *, int, int);
-static	int		  roffargs(const struct rofftree *,
-				int, char *, char **);
-static	int		  roffargok(int, int);
-static	int		  roffnextopt(const struct rofftree *,
-				int, char ***, char **);
-static	int		  roffparseopts(struct rofftree *, int, 
-				char ***, int *, char **);
-static	int		  roffcall(struct rofftree *, int, char **);
-static	int		  roffexit(struct rofftree *, int);
-static	int 		  roffparse(struct rofftree *, char *);
-static	int		  textparse(struct rofftree *, char *);
-static	int		  roffdata(struct rofftree *, int, char *);
-static	int		  roffspecial(struct rofftree *, int, 
-				const char *, const int *,
-				const char **, size_t, char **);
-static	int		  roffsetname(struct rofftree *, char **);
-
-#ifdef __linux__ 
-extern	size_t		  strlcat(char *, const char *, size_t);
-extern	size_t		  strlcpy(char *, const char *, size_t);
-extern	int		  vsnprintf(char *, size_t, 
-				const char *, va_list);
-extern	char		 *strptime(const char *, const char *,
-				struct tm *);
-#endif
-
-int
-roff_free(struct rofftree *tree, int flush)
-{
-	int		 error, t;
-	struct roffnode	*n;
-
-	error = 0;
-
-	if ( ! flush)
-		goto end;
-
-	error = 1;
-
-	if ( ! (ROFFSec_NAME & tree->asec)) {
-		(void)roff_err(tree, NULL, "missing `NAME' section");
-		goto end;
-	} else if ( ! (ROFFSec_NMASK & tree->asec))
-		(void)roff_warn(tree, NULL, "missing suggested `NAME', "
-				"`SYNOPSIS', `DESCRIPTION' sections");
-
-	for (n = tree->last; n; n = n->parent) {
-		if (0 != tokens[n->tok].ctx) 
-			continue;
-		(void)roff_err(tree, NULL, "closing explicit scope "
-				"`%s'", toknames[n->tok]);
-		goto end;
-	}
-
-	while (tree->last) {
-		t = tree->last->tok;
-		if ( ! roffexit(tree, t))
-			goto end;
-	}
-
-	if ( ! (*tree->cb.rofftail)(tree->arg, &tree->tm,
-				tree->os, tree->title, 
-				tree->section, tree->volume))
-		goto end;
-
-	error = 0;
-
-end:
-
-	while (tree->last) 
-		roffnode_free(tree);
-
-	free(tree);
-
-	return(error ? 0 : 1);
-}
-
-
-struct rofftree *
-roff_alloc(const struct roffcb *cb, void *args)
-{
-	struct rofftree	*tree;
-
-	assert(args);
-	assert(cb);
-
-	if (NULL == (tree = calloc(1, sizeof(struct rofftree))))
-		err(1, "calloc");
-
-	tree->arg = args;
-	tree->section = ROFF_MSEC_MAX;
-
-	(void)memcpy(&tree->cb, cb, sizeof(struct roffcb));
-
-	return(tree);
-}
-
-
-int
-roff_engine(struct rofftree *tree, char *buf)
-{
-
-	tree->cur = buf;
-	assert(buf);
-
-	if (0 == *buf) 
-		return(roff_err(tree, buf, "blank line"));
-	else if ('.' != *buf)
-		return(textparse(tree, buf));
-
-	return(roffparse(tree, buf));
-}
-
-
-static int
-textparse(struct rofftree *tree, char *buf)
-{
-	char		*bufp;
-
-	/* TODO: literal parsing. */
-
-	if ( ! (ROFFSec_NAME & tree->asec))
-		return(roff_err(tree, buf, "data before `NAME' section"));
-
-	if (tree->literal)
-		return(roffdata(tree, 0, buf));
-
-	/* LINTED */
-	while (*buf) {
-		while (*buf && isspace(*buf))
-			buf++;
-
-		if (0 == *buf)
-			break;
-
-		bufp = buf++;
-
-		while (*buf && ! isspace(*buf))
-			buf++;
-
-		if (0 != *buf) {
-			*buf++ = 0;
-			if ( ! roffdata(tree, 1, bufp))
-				return(0);
-			continue;
-		}
-
-		if ( ! roffdata(tree, 1, bufp))
-			return(0);
-		break;
-	}
-
-	return(1);
-}
-
-
-static int
-roffargs(const struct rofftree *tree, 
-		int tok, char *buf, char **argv)
-{
-	int		 i;
-	char		*p;
-
-	assert(tok >= 0 && tok < ROFF_MAX);
-	assert('.' == *buf);
-
-	p = buf;
-
-	/*
-	 * This is an ugly little loop.  It parses a line into
-	 * space-delimited tokens.  If a quote mark is encountered, a
-	 * token is alloted the entire quoted text.  If whitespace is
-	 * escaped, it's included in the prior alloted token.
-	 */
-
-	/* LINTED */
-	for (i = 0; *buf && i < ROFF_MAXLINEARG; i++) {
-		if ('\"' == *buf) {
-			argv[i] = ++buf;
-			while (*buf && '\"' != *buf)
-				buf++;
-			if (0 == *buf)
-				return(roff_err(tree, argv[i], 
-					"unclosed quote in arg list"));
-		} else { 
-			argv[i] = buf++;
-			while (*buf) {
-				if ( ! isspace(*buf)) {
-					buf++;
-					continue;
-				}
-				if (*(buf - 1) == '\\') {
-					buf++;
-					continue;
-				}
-				break;
-			}
-			if (0 == *buf)
-				continue;
-		}
-		*buf++ = 0;
-		while (*buf && isspace(*buf))
-			buf++;
-	}
-
-	assert(i > 0);
-	if (ROFF_MAXLINEARG == i && *buf)
-		return(roff_err(tree, p, "too many args"));
-
-	argv[i] = NULL;
-	return(1);
-}
-
-
-static int
-roffscan(int tok, const int *tokv)
-{
-
-	if (NULL == tokv)
-		return(1);
-
-	for ( ; ROFF_MAX != *tokv; tokv++) 
-		if (tok == *tokv)
-			return(1);
-
-	return(0);
-}
-
-
-static int
-roffparse(struct rofftree *tree, char *buf)
-{
-	int		  tok, t;
-	struct roffnode	 *n;
-	char		 *argv[ROFF_MAXLINEARG];
-	char		**argvp;
-
-	if (0 != *buf && 0 != *(buf + 1) && 0 != *(buf + 2))
-		if (0 == strncmp(buf, ".\\\"", 3))
-			return(1);
-
-	if (ROFF_MAX == (tok = rofffindtok(buf + 1))) 
-		return(roff_err(tree, buf, "bogus line macro"));
-	else if ( ! roffargs(tree, tok, buf, argv)) 
-		return(0);
-
-	argvp = (char **)argv;
-
-	/* 
-	 * Prelude macros break some assumptions, so branch now. 
-	 */
-	
-	if ( ! (ROFFSec_PR_Dd & tree->asec)) {
-		assert(NULL == tree->last);
-		return(roffcall(tree, tok, argvp));
-	} 
-
-	/* 
-	 * First check that our possible parents and parent's possible
-	 * children are satisfied.  
-	 */
-
-	if (tree->last && ! roffscan
-			(tree->last->tok, tokens[tok].parents))
-		return(roff_err(tree, *argvp, "`%s' has invalid "
-					"parent `%s'", toknames[tok], 
-					toknames[tree->last->tok]));
-
-	if (tree->last && ! roffscan
-			(tok, tokens[tree->last->tok].children))
-		return(roff_err(tree, *argvp, "`%s' has invalid "
-					"child `%s'", toknames[tok],
-					toknames[tree->last->tok]));
-
-	/*
-	 * Branch if we're not a layout token.
-	 */
-
-	if (ROFF_LAYOUT != tokens[tok].type)
-		return(roffcall(tree, tok, argvp));
-	if (0 == tokens[tok].ctx)
-		return(roffcall(tree, tok, argvp));
-
-	/*
-	 * First consider implicit-end tags, like as follows:
-	 *	.Sh SECTION 1
-	 *	.Sh SECTION 2
-	 * In this, we want to close the scope of the NAME section.  If
-	 * there's an intermediary implicit-end tag, such as
-	 *	.Sh SECTION 1
-	 *	.Ss Subsection 1
-	 *	.Sh SECTION 2
-	 * then it must be closed as well.
-	 */
-
-	if (tok == tokens[tok].ctx) {
-		/* 
-		 * First search up to the point where we must close.
-		 * If one doesn't exist, then we can open a new scope.
-		 */
-
-		for (n = tree->last; n; n = n->parent) {
-			assert(0 == tokens[n->tok].ctx ||
-					n->tok == tokens[n->tok].ctx);
-			if (n->tok == tok)
-				break;
-			if (ROFF_SHALLOW & tokens[tok].flags) {
-				n = NULL;
-				break;
-			}
-			if (tokens[n->tok].ctx == n->tok)
-				continue;
-			return(roff_err(tree, *argv, "`%s' breaks "
-						"scope of prior`%s'",
-						toknames[tok], 
-						toknames[n->tok]));
-		}
-
-		/*
-		 * Create a new scope, as no previous one exists to
-		 * close out.
-		 */
-
-		if (NULL == n)
-			return(roffcall(tree, tok, argvp));
-
-		/* 
-		 * Close out all intermediary scoped blocks, then hang
-		 * the current scope from our predecessor's parent.
-		 */
-
-		do {
-			t = tree->last->tok;
-			if ( ! roffexit(tree, t))
-				return(0);
-		} while (t != tok);
-
-		return(roffcall(tree, tok, argvp));
-	}
-
-	/*
-	 * Now consider explicit-end tags, where we want to close back
-	 * to a specific tag.  Example:
-	 * 	.Bl
-	 * 	.It Item.
-	 * 	.El
-	 * In this, the `El' tag closes out the scope of `Bl'.
-	 */
-
-	assert(tok != tokens[tok].ctx && 0 != tokens[tok].ctx);
-
-	/* LINTED */
-	for (n = tree->last; n; n = n->parent)
-		if (n->tok != tokens[tok].ctx) {
-			if (n->tok == tokens[n->tok].ctx)
-				continue;
-			return(roff_err(tree, *argv, "`%s' breaks "
-						"scope of prior `%s'",
-						toknames[tok], 
-						toknames[n->tok]));
-		} else
-			break;
-
-	if (NULL == n)
-		return(roff_err(tree, *argv, "`%s' has no starting "
-					"tag `%s'", toknames[tok], 
-					toknames[tokens[tok].ctx]));
-
-	/* LINTED */
-	do {
-		t = tree->last->tok;
-		if ( ! roffexit(tree, t))
-			return(0);
-	} while (t != tokens[tok].ctx);
-
-	return(1);
-}
-
-
-static int
-rofffindarg(const char *name)
-{
-	size_t		 i;
-
-	/* FIXME: use a table, this is slow but ok for now. */
-
-	/* LINTED */
-	for (i = 0; i < ROFF_ARGMAX; i++)
-		/* LINTED */
-		if (0 == strcmp(name, tokargnames[i]))
-			return((int)i);
-	
-	return(ROFF_ARGMAX);
-}
-
-
-static int
-rofffindtok(const char *buf)
-{
-	char		 token[4];
-	int		 i;
-
-	for (i = 0; *buf && ! isspace(*buf) && i < 3; i++, buf++)
-		token[i] = *buf;
-
-	if (i == 3) 
-		return(ROFF_MAX);
-
-	token[i] = 0;
-
-	/* FIXME: use a table, this is slow but ok for now. */
-
-	/* LINTED */
-	for (i = 0; i < ROFF_MAX; i++)
-		/* LINTED */
-		if (0 == strcmp(toknames[i], token))
-			return((int)i);
-
-	return(ROFF_MAX);
-}
-
-
-static int
-roffchecksec(struct rofftree *tree, 
-		const char *start, int sec, int fail)
-{
-
-	switch (sec) {
-	case(ROFFSec_PR_Dd):
-		return(1);
-	case(ROFFSec_PR_Dt):
-		if (ROFFSec_PR_Dd & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_PR_Os):
-		if (ROFFSec_PR_Dt & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_NAME):
-		if (ROFFSec_PR_Os & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_SYNOP):
-		if (ROFFSec_NAME & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_DESC):
-		if (ROFFSec_SYNOP & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_RETVAL):
-		if (ROFFSec_DESC & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_ENV):
-		if (ROFFSec_RETVAL & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_FILES):
-		if (ROFFSec_ENV & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_EX):
-		if (ROFFSec_FILES & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_DIAG):
-		if (ROFFSec_EX & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_ERRS):
-		if (ROFFSec_DIAG & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_SEEALSO):
-		if (ROFFSec_ERRS & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_STAND):
-		if (ROFFSec_SEEALSO & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_HIST):
-		if (ROFFSec_STAND & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_AUTH):
-		if (ROFFSec_HIST & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_CAVEATS):
-		if (ROFFSec_AUTH & tree->asec)
-			return(1);
-		break;
-	case(ROFFSec_BUGS):
-		if (ROFFSec_CAVEATS & tree->asec)
-			return(1);
-		break;
-	default:
-		return(1);
-	}
-
-	if (fail)
-		return(0);
-	return(roff_warnp(tree, start, ROFF_Sh, WRN_SECORD));
-}
-
-
-static int
-roffispunct(const char *p)
-{
-
-	if (0 == *p)
-		return(0);
-	if (0 != *(p + 1))
-		return(0);
-
-	switch (*p) {
-	case('{'):
-		/* FALLTHROUGH */
-	case('.'):
-		/* FALLTHROUGH */
-	case(','):
-		/* FALLTHROUGH */
-	case(';'):
-		/* FALLTHROUGH */
-	case(':'):
-		/* FALLTHROUGH */
-	case('?'):
-		/* FALLTHROUGH */
-	case('!'):
-		/* FALLTHROUGH */
-	case('('):
-		/* FALLTHROUGH */
-	case(')'):
-		/* FALLTHROUGH */
-	case('['):
-		/* FALLTHROUGH */
-	case(']'):
-		/* FALLTHROUGH */
-	case('}'):
-		return(1);
-	default:
-		break;
-	}
-
-	return(0);
-}
-
-
-static int
-rofffindcallable(const char *name)
-{
-	int		 c;
-
-	if (ROFF_MAX == (c = rofffindtok(name)))
-		return(ROFF_MAX);
-	assert(c >= 0 && c < ROFF_MAX);
-	return(ROFF_CALLABLE & tokens[c].flags ? c : ROFF_MAX);
-}
-
-
-static struct roffnode *
-roffnode_new(int tokid, struct rofftree *tree)
-{
-	struct roffnode	*p;
-	
-	if (NULL == (p = malloc(sizeof(struct roffnode))))
-		err(1, "malloc");
-
-	p->tok = tokid;
-	p->parent = tree->last;
-	tree->last = p;
-
-	return(p);
-}
-
-
-static int
-roffargok(int tokid, int argid)
-{
-	const int	*c;
-
-	if (NULL == (c = tokens[tokid].args))
-		return(0);
-
-	for ( ; ROFF_ARGMAX != *c; c++) 
-		if (argid == *c)
-			return(1);
-
-	return(0);
-}
-
-
-static void
-roffnode_free(struct rofftree *tree)
-{
-	struct roffnode	*p;
-
-	assert(tree->last);
-
-	p = tree->last;
-	tree->last = tree->last->parent;
-	free(p);
-}
-
-
-static int
-roffspecial(struct rofftree *tree, int tok, const char *start, 
-		const int *argc, const char **argv, 
-		size_t sz, char **ordp)
-{
-
-	switch (tok) {
-	case (ROFF_At):
-		if (0 == sz)
-			break;
-		if (ROFF_ATT_MAX != roff_att(*ordp))
-			break;
-		return(roff_errp(tree, *ordp, tok, ERR_BADARG));
-	
-	case (ROFF_Xr):
-		if (2 == sz) {
-			assert(ordp[1]);
-			if (ROFF_MSEC_MAX != roff_msec(ordp[1]))
-				break;
-			if ( ! roff_warn(tree, start, "invalid `%s' manual "
-						"section", toknames[tok]))
-				return(0);
-		}
-		/* FALLTHROUGH */
-
-	case (ROFF_Sx):
-		/* FALLTHROUGH*/
-	case (ROFF_Fn):
-		if (0 != sz) 
-			break;
-		return(roff_errp(tree, start, tok, ERR_ARGGE1));
-
-	case (ROFF_Nm):
-		if (0 == sz) {
-			if (0 != tree->name[0]) {
-				ordp[0] = tree->name;
-				ordp[1] = NULL;
-				break;
-			}
-			return(roff_err(tree, start, "`Nm' not set"));
-		} else if ( ! roffsetname(tree, ordp))
-			return(0);
-		break;
-
-	case (ROFF_Rv):
-		/* FALLTHROUGH*/
-	case (ROFF_Ex):
-		if (1 == sz) 
-			break;
-		return(roff_errp(tree, start, tok, ERR_ARGEQ1));
-
-	case (ROFF_Sm):
-		if (1 != sz)
-			return(roff_errp(tree, start, tok, ERR_ARGEQ1));
-		else if (0 == strcmp(ordp[0], "on") || 
-				0 == strcmp(ordp[0], "off"))
-			break;
-		return(roff_errp(tree, *ordp, tok, ERR_BADARG));
-	
-	case (ROFF_Ud):
-		/* FALLTHROUGH */
-	case (ROFF_Ux):
-		/* FALLTHROUGH */
-	case (ROFF_Bt):
-		if (0 == sz) 
-			break;
-		return(roff_errp(tree, start, tok, ERR_ARGEQ0));
-	default:
-		break;
-	}
-
-	return((*tree->cb.roffspecial)(tree->arg, tok, tree->cur, 
-				argc, argv, (const char **)ordp));
-}
-
-
-static int
-roffexit(struct rofftree *tree, int tok)
-{
-
-	assert(tokens[tok].cb);
-	return((*tokens[tok].cb)(tok, tree, NULL, ROFF_EXIT));
-}
-
-
-static int
-roffcall(struct rofftree *tree, int tok, char **argv)
-{
-	int		 i;
-	enum roffmsec	 c;
-
-	if (NULL == tokens[tok].cb)
-		return(roff_errp(tree, *argv, tok, ERR_NOTSUP));
-
-	if (tokens[tok].sections && ROFF_MSEC_MAX != tree->section) {
-		i = 0;
-		while (ROFF_MSEC_MAX != 
-				(c = tokens[tok].sections[i++]))
-			if (c == tree->section)
-				break;
-		if (ROFF_MSEC_MAX == c) {
-			if ( ! roff_warn(tree, *argv, "`%s' is not a valid "
-					"macro in this manual section",
-					toknames[tok]))
-				return(0);
-		}
-	}
-
-	return((*tokens[tok].cb)(tok, tree, argv, ROFF_ENTER));
-}
-
-
-static int
-roffnextopt(const struct rofftree *tree, int tok, 
-		char ***in, char **val)
-{
-	char		*arg, **argv;
-	int		 v;
-
-	*val = NULL;
-	argv = *in;
-	assert(argv);
-
-	if (NULL == (arg = *argv))
-		return(-1);
-	if ('-' != *arg)
-		return(-1);
-
-	if (ROFF_ARGMAX == (v = rofffindarg(arg + 1))) {
-		if ( ! roff_warn(tree, arg, "argument-like parameter `%s' to "
-					"`%s'", arg, toknames[tok]))
-			return(ROFF_ARGMAX);
-		return(-1);
-	} 
-	
-	if ( ! roffargok(tok, v)) {
-		if ( ! roff_warn(tree, arg, "invalid argument parameter `%s' to "
-				"`%s'", tokargnames[v], toknames[tok]))
-			return(ROFF_ARGMAX);
-		return(-1);
-	} 
-	
-	if ( ! (ROFF_VALUE & tokenargs[v]))
-		return(v);
-
-	*in = ++argv;
-
-	if (NULL == *argv) {
-		(void)roff_err(tree, arg, "empty value of `%s' for `%s'",
-				tokargnames[v], toknames[tok]);
-		return(ROFF_ARGMAX);
-	}
-
-	return(v);
-}
-
-
-static int
-roffpurgepunct(struct rofftree *tree, char **argv)
-{
-	int		 i;
-
-	i = 0;
-	while (argv[i])
-		i++;
-	assert(i > 0);
-	if ( ! roffispunct(argv[--i]))
-		return(1);
-	while (i >= 0 && roffispunct(argv[i]))
-		i--;
-	i++;
-
-	/* LINTED */
-	while (argv[i])
-		if ( ! roffdata(tree, 0, argv[i++]))
-			return(0);
-	return(1);
-}
-
-
-static int
-roffparseopts(struct rofftree *tree, int tok, 
-		char ***args, int *argc, char **argv)
-{
-	int		 i, c;
-	char		*v;
-
-	i = 0;
-
-	while (-1 != (c = roffnextopt(tree, tok, args, &v))) {
-		if (ROFF_ARGMAX == c) 
-			return(0);
-
-		argc[i] = c;
-		argv[i] = v;
-		i++;
-		*args = *args + 1;
-	}
-
-	argc[i] = ROFF_ARGMAX;
-	argv[i] = NULL;
-	return(1);
-}
-
-
-static int
-roffdata(struct rofftree *tree, int space, char *buf)
-{
-
-	if (0 == *buf)
-		return(1);
-	return((*tree->cb.roffdata)(tree->arg, 
-				space != 0, tree->cur, buf));
-}
-
-
-/* ARGSUSED */
-static	int
-roff_Dd(ROFFCALL_ARGS)
-{
-	time_t		 t;
-	char		*p, buf[32];
-	size_t		 sz;
-
-	if (ROFFSec_PR_Os & tree->asec)
-		return(roff_text(tok, tree, argv, type));
-	if (ROFFSec_PR_Dd & tree->asec)
-		return(roff_errp(tree, *argv, tok, ERR_PR_REP));
-	if ( ! roffchecksec(tree, *argv, ROFFSec_PR_Dd, 1))
-		return(roff_errp(tree, *argv, tok, ERR_PR_OOO));
-
-	assert(NULL == tree->last);
-	argv++;
-	tree->asec |= (tree->csec = ROFFSec_PR_Dd);
-
-	/*
-	 * This is a bit complex because there are many forms the date
-	 * can be in:  it can be simply $Mdocdate$, $Mdocdate <date>$,
-	 * or a raw date.  Process accordingly.
-	 */
-
-	if (0 == strcmp(*argv, "$Mdocdate$")) {
-		t = time(NULL);
-		if (NULL == localtime_r(&t, &tree->tm))
-			err(1, "localtime_r");
-		return(1);
-	} 
-
-	buf[0] = 0;
-	p = *argv;
-	sz = sizeof(buf);
-
-	if (0 != strcmp(*argv, "$Mdocdate:")) {
-		while (*argv) {
-			if (strlcat(buf, *argv++, sz) < sz)
-				continue;
-			return(roff_errp(tree, p, tok, ERR_BADARG));
-		}
-		if (strptime(buf, "%b%d,%Y", &tree->tm))
-			return(1);
-		return(roff_errp(tree, p, tok, ERR_BADARG));
-	}
-
-	argv++;
-
-	while (*argv && **argv != '$') {
-		if (strlcat(buf, *argv++, sz) >= sz)
-			return(roff_errp(tree, p, tok, ERR_BADARG));
-		if (strlcat(buf, " ", sz) >= sz) 
-			return(roff_errp(tree, p, tok, ERR_BADARG));
-	}
-
-	if (NULL == *argv) 
-		return(roff_errp(tree, p, tok, ERR_BADARG));
-	if (NULL == strptime(buf, "%b %d %Y", &tree->tm)) 
-		return(roff_errp(tree, p, tok, ERR_BADARG));
-
-	return(1);
-}
-
-
-/* ARGSUSED */
-static	int
-roff_Dt(ROFFCALL_ARGS)
-{
-	size_t		 sz;
-
-	if (ROFFSec_PR_Os & tree->asec)
-		return(roff_text(tok, tree, argv, type));
-	if (ROFFSec_PR_Dt & tree->asec)
-		return(roff_errp(tree, *argv, tok, ERR_PR_REP));
-	if ( ! roffchecksec(tree, *argv, ROFFSec_PR_Dt, 1))
-		return(roff_errp(tree, *argv, tok, ERR_PR_OOO));
-
-	argv++;
-	tree->asec |= (tree->csec = ROFFSec_PR_Dt);
-	sz = sizeof(tree->title);
-
-	if (NULL == *argv) 
-		return(roff_errp(tree, *argv, tok, ERR_ARGGE2));
-	if (strlcpy(tree->title, *argv, sz) >= sz)
-		return(roff_errp(tree, *argv, tok, ERR_ARGLEN));
-
-	argv++;
-	if (NULL == *argv)
-		return(roff_errp(tree, *argv, tok, ERR_ARGGE2));
-
-	if (ROFF_MSEC_MAX == (tree->section = roff_msec(*argv)))
-		return(roff_errp(tree, *argv, tok, ERR_BADARG));
-
-	argv++;
-
-	if (NULL == *argv) {
-		switch (tree->section) {
-		case(ROFF_MSEC_1):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_6):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_7):
-			tree->volume = ROFF_VOL_URM;
-			break;
-		case(ROFF_MSEC_2):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_3):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_3p):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_4):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_5):
-			tree->volume = ROFF_VOL_PRM;
-			break;
-		case(ROFF_MSEC_8):
-			tree->volume = ROFF_VOL_PRM;
-			break;
-		case(ROFF_MSEC_9):
-			tree->volume = ROFF_VOL_KM;
-			break;
-		case(ROFF_MSEC_UNASS):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_DRAFT):
-			/* FALLTHROUGH */
-		case(ROFF_MSEC_PAPER):
-			tree->volume = ROFF_VOL_NONE;
-			break;
-		default:
-			abort();
-			/* NOTREACHED */
-		}
-	} else if (ROFF_VOL_MAX == (tree->volume = roff_vol(*argv)))
-		return(roff_errp(tree, *argv, tok, ERR_BADARG));
-
-	assert(NULL == tree->last);
-
-	return(1);
-}
-
-
-static int
-roffsetname(struct rofftree *tree, char **ordp)
-{
-	size_t		 sz;
-	
-	assert(*ordp);
-
-	/* FIXME: not all sections can set this. */
-
-	if (NULL != *(ordp + 1))
-		return(roff_errp(tree, *ordp, ROFF_Nm, ERR_ARGMNY));
-	
-	sz = sizeof(tree->name);
-	if (strlcpy(tree->name, *ordp, sz) >= sz)
-		return(roff_errp(tree, *ordp, ROFF_Nm, ERR_ARGLEN));
-
-	return(1);
-}
-
-
-/* ARGSUSED */
-static	int
-roff_Ns(ROFFCALL_ARGS)
-{
-	int		 j, c, first;
-	char		*morep[1];
-
-	first = (*argv++ == tree->cur);
-	morep[0] = NULL;
-
-	if ( ! roffspecial(tree, tok, *argv, NULL, NULL, 0, morep))
-		return(0);
-
-	while (*argv) {
-		if (ROFF_MAX != (c = rofffindcallable(*argv))) {
-			if ( ! roffcall(tree, c, argv))
-				return(0);
-			break;
-		}
-
-		if ( ! roffispunct(*argv)) {
-			if ( ! roffdata(tree, 1, *argv++))
-				return(0);
-			continue;
-		}
-
-		for (j = 0; argv[j]; j++)
-			if ( ! roffispunct(argv[j]))
-				break;
-
-		if (argv[j]) {
-			if ( ! roffdata(tree, 0, *argv++))
-				return(0);
-			continue;
-		}
-
-		break;
-	}
-
-	if ( ! first)
-		return(1);
-
-	return(roffpurgepunct(tree, argv));
-}
-
-
-/* ARGSUSED */
-static	int
-roff_Os(ROFFCALL_ARGS)
-{
-	char		*p;
-	size_t		 sz;
-
-	if (ROFFSec_PR_Os & tree->asec)
-		return(roff_text(tok, tree, argv, type));
-	if ( ! roffchecksec(tree, *argv, ROFFSec_PR_Os, 1))
-		return(roff_errp(tree, *argv, tok, ERR_PR_OOO));
-
-	p = *++argv;
-	sz = sizeof(tree->os);
-	tree->asec |= (tree->csec = ROFFSec_PR_Os);
-
-	tree->os[0] = 0;
-
-	while (*argv)
-		if (strlcat(tree->os, *argv++, sz) >= sz)
-			return(roff_errp(tree, p, tok, ERR_ARGLEN));
-
-	if (0 == tree->os[0])
-		if (strlcpy(tree->os, "LOCAL", sz) >= sz)
-			return(roff_errp(tree, p, tok, ERR_ARGLEN));
-
-	assert(ROFF_MSEC_MAX != tree->section);
-	assert(0 != tree->title[0]);
-	assert(0 != tree->os[0]);
-
-	assert(NULL == tree->last);
-
-	return((*tree->cb.roffhead)(tree->arg, &tree->tm,
-				tree->os, tree->title, 
-				tree->section, tree->volume));
-}
-
-
-/* ARGSUSED */
-static int
-roff_layout(ROFFCALL_ARGS) 
-{
-	int		 i, c, argcp[ROFF_MAXLINEARG];
-	char		*argvp[ROFF_MAXLINEARG], *p;
-
-	/*
-	 * The roff_layout function is for multi-line macros.  A layout
-	 * has a start and end point, which is either declared
-	 * explicitly or implicitly.  An explicit start and end is
-	 * embodied by `.Bl' and `.El', with the former being the start
-	 * and the latter being an end.  The `.Sh' and `.Ss' tags, on
-	 * the other hand, are implicit.  The scope of a layout is the
-	 * space between start and end.  Explicit layouts may not close
-	 * out implicit ones and vice versa; implicit layouts may close
-	 * out other implicit layouts.
-	 */
-
-	assert( ! (ROFF_CALLABLE & tokens[tok].flags));
-
-	if ( ! (ROFFSec_PR_Os & tree->asec))
-		return(roff_errp(tree, *argv, tok, ERR_NOT_PR));
-
-	if (ROFF_EXIT == type) {
-		roffnode_free(tree);
-		if ( ! (*tree->cb.roffblkbodyout)(tree->arg, tok))
-			return(0);
-		return((*tree->cb.roffblkout)(tree->arg, tok));
-	} 
-
-	p = *argv++;
-	assert( ! (ROFF_CALLABLE & tokens[tok].flags));
-
-	if ( ! roffparseopts(tree, tok, &argv, argcp, argvp))
-		return(0);
-	if (NULL == roffnode_new(tok, tree))
-		return(0);
-
-	/*
-	 * Layouts have two parts: the layout body and header.  The
-	 * layout header is the trailing text of the line macro, while
-	 * the layout body is everything following until termination.
-	 * Example:
-	 *
-	 * .It Fl f ) ;
-	 * Bar.
-	 *
-	 * ...Produces...
-	 *
-	 * <block>
-	 * 	<head>
-	 * 		<!Fl f!> ;
-	 * 	</head>
-	 * 	
-	 *	<body>
-	 *		Bar.
-	 *	</body>
-	 * </block>
-	 */
-
-	if ( ! (*tree->cb.roffblkin)(tree->arg, tok, argcp, 
-				(const char **)argvp))
-		return(0);
-
-	/* +++ Begin run macro-specific hooks over argv. */
-
-	switch (tok) {
-	case (ROFF_Bd):
-		tree->literal++;
-		break;
-
-	case (ROFF_Sh):
-		if (NULL == *argv) {
-			argv--;
-			return(roff_errp(tree, *argv, tok, ERR_ARGGE1));
-		}
-
-		tree->csec = roff_sec((const char **)argv);
-
-		if ( ! (ROFFSec_OTHER & tree->csec) &&
-				tree->asec & tree->csec) 
-			if ( ! roff_warn(tree, *argv, "section repeated"))
-				return(0);
-
-		if (0 == tree->asec && ! (ROFFSec_NAME & tree->csec))
-			return(roff_err(tree, *argv, "`NAME' section "
-						"must be first"));
-		if ( ! roffchecksec(tree, *argv, tree->csec, 0))
-			return(0);
-
-		tree->asec |= tree->csec;
-
-		if ( ! roffspecial(tree, tok, p, argcp, 
-					(const char **)argvp, 0, argv))
-			return(0);
-		break;
-	default:
-		break;
-	}
-
-	/* --- End run macro-specific hooks over argv. */
-
-	if (NULL == *argv)
-		return((*tree->cb.roffblkbodyin)
-				(tree->arg, tok, argcp, 
-				 (const char **)argvp));
-
-	if ( ! (*tree->cb.roffblkheadin)(tree->arg, tok, argcp, 
-				(const char **)argvp))
-		return(0);
-
-	/*
-	 * If there are no parsable parts, then write remaining tokens
-	 * into the layout header and exit.
-	 */
-
-	if ( ! (ROFF_PARSED & tokens[tok].flags)) {
-		i = 0;
-		while (*argv)
-			if ( ! roffdata(tree, i++, *argv++))
-				return(0);
-
-		if ( ! (*tree->cb.roffblkheadout)(tree->arg, tok))
-			return(0);
-		return((*tree->cb.roffblkbodyin)(tree->arg, tok, argcp,
-				 (const char **)argvp));
-	}
-
-	/*
-	 * Parsable elements may be in the header (or be the header, for
-	 * that matter).  Follow the regular parsing rules for these.
-	 */
-
-	i = 0;
-	while (*argv) {
-		if (ROFF_MAX == (c = rofffindcallable(*argv))) {
-			assert(tree->arg);
-			if ( ! roffdata(tree, i++, *argv++))
-				return(0);
-			continue;
-		}
-		if ( ! roffcall(tree, c, argv))
-			return(0);
-		break;
-	}
-
-	/* 
-	 * If there's trailing punctuation in the header, then write it
-	 * out now.  Here we mimic the behaviour of a line-dominant text
-	 * macro.
-	 */
-
-	if (NULL == *argv) {
-		if ( ! (*tree->cb.roffblkheadout)(tree->arg, tok))
-			return(0);
-		return((*tree->cb.roffblkbodyin)
-				(tree->arg, tok, argcp, 
-				 (const char **)argvp));
-	}
-
-	/*
-	 * Expensive.  Scan to the end of line then work backwards until
-	 * a token isn't punctuation.
-	 */
-
-	if ( ! roffpurgepunct(tree, argv))
-		return(0);
-	if ( ! (*tree->cb.roffblkheadout)(tree->arg, tok))
-		return(0);
-	return((*tree->cb.roffblkbodyin)(tree->arg, 
-				tok, argcp, (const char **)argvp));
-}
-
-
-/* ARGSUSED */
-static int
-roff_ordered(ROFFCALL_ARGS) 
-{
-	int		 i, first, c, argcp[ROFF_MAXLINEARG];
-	char		*ordp[ROFF_MAXLINEARG], *p,
-			*argvp[ROFF_MAXLINEARG];
-
-	/*
-	 * Ordered macros pass their arguments directly to handlers,
-	 * instead of considering it free-form text.  Thus, the
-	 * following macro looks as follows:
-	 *
-	 * .Xr foo 1 ) ,
-	 *
-	 * .Xr arg1 arg2 punctuation
-	 */
-
-	if ( ! (ROFFSec_PR_Os & tree->asec))
-		return(roff_errp(tree, *argv, tok, ERR_NOT_PR));
-
-	first = (*argv == tree->cur);
-	p = *argv++;
-	ordp[0] = NULL;
-
-	if ( ! roffparseopts(tree, tok, &argv, argcp, argvp))
-		return(0);
-
-	if (NULL == *argv)
-		return(roffspecial(tree, tok, p, argcp, 
-					(const char **)argvp, 0, ordp));
-
-	i = 0;
-	while (*argv && i < ROFF_MAXLINEARG) {
-		c = ROFF_PARSED & tokens[tok].flags ?
-			rofffindcallable(*argv) : ROFF_MAX;
-
-		if (ROFF_MAX == c && ! roffispunct(*argv)) {
-			ordp[i++] = *argv++;
-			continue;
-		}
-		ordp[i] = NULL;
-
-		if (ROFF_MAX == c)
-			break;
-
-		if ( ! roffspecial(tree, tok, p, argcp, 
-					(const char **)argvp,
-					(size_t)i, ordp))
-			return(0);
-
-		return(roffcall(tree, c, argv));
-	}
-
-	assert(i != ROFF_MAXLINEARG);
-	ordp[i] = NULL;
-
-	if ( ! roffspecial(tree, tok, p, argcp, 
-				(const char**)argvp,
-				(size_t)i, ordp))
-		return(0);
-
-	/* FIXME: error if there's stuff after the punctuation. */
-
-	if ( ! first || NULL == *argv)
-		return(1);
-
-	return(roffpurgepunct(tree, argv));
-}
-
-
-static int
-macro_default(struct rofftree *tree, int tok, char *args[])
-{
-	char		**p;
-	char		 *argv[ROFF_MAXLINEARG];
-	int		  i, argc[ROFF_MAXLINEARG];
-
-	if ( ! roffparseopts(tree, tok, &args, argc, argv))
-		return(0);
-
-	if ( ! (ROFF_PARSED & tokens[tok].flags)) 
-		return((*tree->cb.macro)(tree->arg, tok, argc, argv, 0, args));
-
-	p = args;
-
-	while (*args) {
-		c = rofffindcallable(*args);
-		if (ROFF_MAX == c) {
-			if (roffispunct(*args)) {
-
-
-			}
-		}
-
-		if (ROFF_MAX != (c = rofffindcallable(*argv))) {
-			if ( ! (ROFF_LSCOPE & tokens[tok].flags))
-				if ( ! (*tree->cb.roffout)(tree->arg, tok))
-					return(0);
-	
-			if ( ! roffcall(tree, c, argv))
-				return(0);
-			if (ROFF_LSCOPE & tokens[tok].flags)
-				if ( ! (*tree->cb.roffout)(tree->arg, tok))
-					return(0);
-			break;
-		}
-
-		if ( ! roffispunct(*argv)) {
-			if ( ! roffdata(tree, i++, *argv++))
-				return(0);
-			continue;
-		}
-
-		i = 1;
-		for (j = 0; argv[j]; j++)
-			if ( ! roffispunct(argv[j]))
-				break;
-
-		if (argv[j]) {
-			if (ROFF_LSCOPE & tokens[tok].flags) {
-				if ( ! roffdata(tree, 0, *argv++))
-					return(0);
-				continue;
-			}
-			if ( ! (*tree->cb.roffout)(tree->arg, tok))
-				return(0);
-			if ( ! roffdata(tree, 0, *argv++))
-				return(0);
-			if ( ! (*tree->cb.roffin)(tree->arg, tok, 
-						argcp, 
-						(const char **)argvp))
-				return(0);
-
-			i = 0;
-			continue;
-		}
-
-		if ( ! (*tree->cb.roffout)(tree->arg, tok))
-			return(0);
-		break;
-	}
-}
-
-
-/* ARGSUSED */
-static int
-roff_text(ROFFCALL_ARGS) 
-{
-	int		 i, j, first, c, argcp[ROFF_MAXLINEARG];
-	char		*argvp[ROFF_MAXLINEARG];
-
-	/*
-	 * Text macros are similar to special tokens, except that
-	 * arguments are instead flushed as pure data: we're only
-	 * concerned with the macro and its arguments.  Example:
-	 * 
-	 * .Fl v W f ;
-	 *
-	 * ...Produces...
-	 *
-	 * <fl> v W f </fl> ;
-	 */
-
-	if ( ! (ROFFSec_PR_Os & tree->asec))
-		return(roff_errp(tree, *argv, tok, ERR_NOT_PR));
-
-	first = (*argv == tree->cur);
-	argv++;
-
-	if ( ! roffparseopts(tree, tok, &argv, argcp, argvp))
-		return(0);
-	if ( ! (*tree->cb.roffin)(tree->arg, tok, argcp, 
-				(const char **)argvp))
-		return(0);
-	if (NULL == *argv)
-		return((*tree->cb.roffout)(tree->arg, tok));
-
-	if ( ! (ROFF_PARSED & tokens[tok].flags)) {
-		i = 0;
-		while (*argv)
-			if ( ! roffdata(tree, i++, *argv++))
-				return(0);
-		return((*tree->cb.roffout)(tree->arg, tok));
-	}
-
-	/*
-	 * Deal with punctuation.  Ugly.  Work ahead until we encounter
-	 * terminating punctuation.  If we encounter it and all
-	 * subsequent tokens are punctuation, then stop processing (the
-	 * line-dominant macro will print these tokens after closure).
-	 * If the punctuation is followed by non-punctuation, then close
-	 * and re-open our scope, then continue.
-	 */
-
-	i = 0;
-	while (*argv) {
-		if (ROFF_MAX != (c = rofffindcallable(*argv))) {
-			if ( ! (ROFF_LSCOPE & tokens[tok].flags))
-				if ( ! (*tree->cb.roffout)(tree->arg, tok))
-					return(0);
-	
-			if ( ! roffcall(tree, c, argv))
-				return(0);
-			if (ROFF_LSCOPE & tokens[tok].flags)
-				if ( ! (*tree->cb.roffout)(tree->arg, tok))
-					return(0);
-			break;
-		}
-
-		if ( ! roffispunct(*argv)) {
-			if ( ! roffdata(tree, i++, *argv++))
-				return(0);
-			continue;
-		}
-
-		i = 1;
-		for (j = 0; argv[j]; j++)
-			if ( ! roffispunct(argv[j]))
-				break;
-
-		if (argv[j]) {
-			if (ROFF_LSCOPE & tokens[tok].flags) {
-				if ( ! roffdata(tree, 0, *argv++))
-					return(0);
-				continue;
-			}
-			if ( ! (*tree->cb.roffout)(tree->arg, tok))
-				return(0);
-			if ( ! roffdata(tree, 0, *argv++))
-				return(0);
-			if ( ! (*tree->cb.roffin)(tree->arg, tok, 
-						argcp, 
-						(const char **)argvp))
-				return(0);
-
-			i = 0;
-			continue;
-		}
-
-		if ( ! (*tree->cb.roffout)(tree->arg, tok))
-			return(0);
-		break;
-	}
-
-	if (NULL == *argv)
-		return((*tree->cb.roffout)(tree->arg, tok));
-	if ( ! first)
-		return(1);
-
-	return(roffpurgepunct(tree, argv));
-}
-
-
-/* ARGSUSED */
-static int
-roff_noop(ROFFCALL_ARGS)
-{
-
-	switch (tok) {
-	case (ROFF_Ed):
-		tree->literal--;
-		break;
-	default:
-		break;
-	}
-
-	return(1);
-}
-
-
-/* ARGSUSED */
-static int
-roff_depr(ROFFCALL_ARGS)
-{
-
-	return(roff_errp(tree, *argv, tok, ERR_DEPREC));
-}
-
-
-/* FIXME: push this into the filter. */
-static int
-roff_warnp(const struct rofftree *tree, const char *pos,
-		int tok, enum rofferr type)
-{
-	char		 *p;
-
-	switch (type) {
-	case (WRN_SECORD):
-		p = "section at `%s' out of order";
-		break;
-	default:
-		abort();
-		/* NOTREACHED */
-	}
-
-	return(roff_warn(tree, pos, p, toknames[tok]));
-}
-
-
-static int
-roff_warn(const struct rofftree *tree, const char *pos, char *fmt, ...)
-{
-	va_list		 ap;
-	char		 buf[128];
-
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf), fmt, ap);
-	va_end(ap);
-
-	return((*tree->cb.roffmsg)(tree->arg, 
-				ROFF_WARN, tree->cur, pos, buf));
-}
-
-
-/* FIXME: push this into the filter. */
-static int
-roff_errp(const struct rofftree *tree, const char *pos, 
-		int tok, enum rofferr type)
-{
-	char		 *p;
-
-	switch (type) {
-	case (ERR_ARGEQ1):
-		p = "`%s' expects exactly one argument";
-		break;
-	case (ERR_ARGEQ0):
-		p = "`%s' expects exactly zero arguments";
-		break;
-	case (ERR_ARGGE1):
-		p = "`%s' expects one or more arguments";
-		break;
-	case (ERR_ARGGE2):
-		p = "`%s' expects two or more arguments";
-		break;
-	case (ERR_BADARG):
-		p = "invalid argument for `%s'";
-		break;
-	case (ERR_NOTSUP):
-		p = "macro `%s' is not supported";
-		break;
-	case(ERR_PR_OOO):
-		p = "prelude macro `%s' is out of order";
-		break;
-	case(ERR_PR_REP):
-		p = "prelude macro `%s' repeated";
-		break;
-	case(ERR_ARGLEN):
-		p = "macro argument for `%s' is too long";
-		break;
-	case(ERR_DEPREC):
-		p = "macro `%s' is deprecated";
-		break;
-	case(ERR_NOT_PR):
-		p = "macro `%s' disallowed in prelude";
-		break;
-	case(ERR_ARGMNY):
-		p = "too many arguments for macro `%s'";
-		break;
-	default:
-		abort();
-		/* NOTREACHED */
-	}
-
-	return(roff_err(tree, pos, p, toknames[tok]));
-}
-
-
-static int
-roff_err(const struct rofftree *tree, const char *pos, char *fmt, ...)
-{
-	va_list		 ap;
-	char		 buf[128];
-
-	va_start(ap, fmt);
-	if (-1 == vsnprintf(buf, sizeof(buf), fmt, ap))
-		err(1, "vsnprintf");
-	va_end(ap);
-
-	return((*tree->cb.roffmsg)
-			(tree->arg, ROFF_ERROR, tree->cur, pos, buf));
-}
-