X-Git-Url: https://git.cameronkatri.com/mandoc.git/blobdiff_plain/a7f2dc1d0e14e61727a4abdb0250b39e016e0705..e0443320f54c8a62a9b68da4d72782b1caca44c6:/mdoc.c

diff --git a/mdoc.c b/mdoc.c
index 4774dd3e..5be1e781 100644
--- a/mdoc.c
+++ b/mdoc.c
@@ -1,39 +1,42 @@
-/*	$Id: mdoc.c,v 1.82 2009/06/16 19:45:51 kristaps Exp $ */
+/*	$Id: mdoc.c,v 1.260 2017/02/16 03:00:23 schwarze Exp $ */
 /*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010, 2012-2017 Ingo Schwarze <schwarze@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
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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 "config.h"
+
+#include <sys/types.h>
+
 #include <assert.h>
 #include <ctype.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-
+#include <time.h>
+
+#include "mandoc_aux.h"
+#include "mandoc.h"
+#include "roff.h"
+#include "mdoc.h"
+#include "libmandoc.h"
+#include "roff_int.h"
 #include "libmdoc.h"
 
-enum	merr {
-	ENOCALL,
-	EBODYPROL,
-	EPROLBODY,
-	ESPACE,
-	ETEXTPROL,
-	ENOBLANK,
-	EMALLOC
-};
-
-const	char *const __mdoc_macronames[MDOC_MAX] = {		 
+const	char *const __mdoc_macronames[MDOC_MAX + 1] = {
+	"text",
 	"Ap",		"Dd",		"Dt",		"Os",
 	"Sh",		"Ss",		"Pp",		"D1",
 	"Dl",		"Bd",		"Ed",		"Bl",
@@ -44,12 +47,9 @@ const	char *const __mdoc_macronames[MDOC_MAX] = {
 	"Ic",		"In",		"Li",		"Nd",
 	"Nm",		"Op",		"Ot",		"Pa",
 	"Rv",		"St",		"Va",		"Vt",
-	/* LINTED */
-	"Xr",		"\%A",		"\%B",		"\%D",
-	/* LINTED */
-	"\%I",		"\%J",		"\%N",		"\%O",
-	/* LINTED */
-	"\%P",		"\%R",		"\%T",		"\%V",
+	"Xr",		"%A",		"%B",		"%D",
+	"%I",		"%J",		"%N",		"%O",
+	"%P",		"%R",		"%T",		"%V",
 	"Ac",		"Ao",		"Aq",		"At",
 	"Bc",		"Bf",		"Bo",		"Bq",
 	"Bsx",		"Bx",		"Db",		"Dc",
@@ -65,649 +65,418 @@ const	char *const __mdoc_macronames[MDOC_MAX] = {
 	"Bk",		"Ek",		"Bt",		"Hf",
 	"Fr",		"Ud",		"Lb",		"Lp",
 	"Lk",		"Mt",		"Brq",		"Bro",
-	/* LINTED */
-	"Brc",		"\%C",		"Es",		"En",
-	/* LINTED */
-	"Dx",		"\%Q"
-	};
+	"Brc",		"%C",		"Es",		"En",
+	"Dx",		"%Q",		"br",		"sp",
+	"%U",		"Ta",		"ll",
+};
 
-const	char *const __mdoc_argnames[MDOC_ARG_MAX] = {		 
+const	char *const __mdoc_argnames[MDOC_ARG_MAX] = {
 	"split",		"nosplit",		"ragged",
-	"unfilled",		"literal",		"file",		 
-	"offset",		"bullet",		"dash",		 
-	"hyphen",		"item",			"enum",		 
-	"tag",			"diag",			"hang",		 
-	"ohang",		"inset",		"column",	 
-	"width",		"compact",		"std",	 
+	"unfilled",		"literal",		"file",
+	"offset",		"bullet",		"dash",
+	"hyphen",		"item",			"enum",
+	"tag",			"diag",			"hang",
+	"ohang",		"inset",		"column",
+	"width",		"compact",		"std",
 	"filled",		"words",		"emphasis",
-	"symbolic",		"nested"
+	"symbolic",		"nested",		"centered"
 	};
 
-const	char * const *mdoc_macronames = __mdoc_macronames;
+const	char * const *mdoc_macronames = __mdoc_macronames + 1;
 const	char * const *mdoc_argnames = __mdoc_argnames;
 
-static	void		  mdoc_free1(struct mdoc *);
-static	int		  mdoc_alloc1(struct mdoc *);
-static	struct mdoc_node *node_alloc(struct mdoc *, int, int, 
-				int, enum mdoc_type);
-static	int		  node_append(struct mdoc *, 
-				struct mdoc_node *);
-static	int		  parsetext(struct mdoc *, int, char *);
-static	int		  parsemacro(struct mdoc *, int, char *);
-static	int		  macrowarn(struct mdoc *, int, const char *);
-static	int		  perr(struct mdoc *, int, int, enum merr);
-
-#define verr(m, t) perr((m), (m)->last->line, (m)->last->pos, (t))
-
-/*
- * Get the first (root) node of the parse tree.
- */
-const struct mdoc_node *
-mdoc_node(const struct mdoc *m)
-{
-
-	return(MDOC_HALT & m->flags ? NULL : m->first);
-}
-
-
-const struct mdoc_meta *
-mdoc_meta(const struct mdoc *m)
-{
-
-	return(MDOC_HALT & m->flags ? NULL : &m->meta);
-}
-
-
-static void
-mdoc_free1(struct mdoc *mdoc)
-{
-
-	if (mdoc->first)
-		mdoc_node_freelist(mdoc->first);
-	if (mdoc->meta.title)
-		free(mdoc->meta.title);
-	if (mdoc->meta.os)
-		free(mdoc->meta.os);
-	if (mdoc->meta.name)
-		free(mdoc->meta.name);
-	if (mdoc->meta.arch)
-		free(mdoc->meta.arch);
-	if (mdoc->meta.vol)
-		free(mdoc->meta.vol);
-}
-
-
-static int
-mdoc_alloc1(struct mdoc *mdoc)
-{
-
-	bzero(&mdoc->meta, sizeof(struct mdoc_meta));
-	mdoc->flags = 0;
-	mdoc->lastnamed = mdoc->lastsec = 0;
-	mdoc->last = calloc(1, sizeof(struct mdoc_node));
-	if (NULL == mdoc->last)
-		return(0);
-
-	mdoc->first = mdoc->last;
-	mdoc->last->type = MDOC_ROOT;
-	mdoc->next = MDOC_NEXT_CHILD;
-	return(1);
-}
-
-
-/*
- * Free up all resources contributed by a parse:  the node tree,
- * meta-data and so on.  Then reallocate the root node for another
- * parse.
- */
-int
-mdoc_reset(struct mdoc *mdoc)
-{
-
-	mdoc_free1(mdoc);
-	return(mdoc_alloc1(mdoc));
-}
-
-
-/*
- * Completely free up all resources.
- */
-void
-mdoc_free(struct mdoc *mdoc)
-{
-
-	mdoc_free1(mdoc);
-	if (mdoc->htab)
-		mdoc_hash_free(mdoc->htab);
-	free(mdoc);
-}
-
-
-struct mdoc *
-mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
-{
-	struct mdoc	*p;
-
-	if (NULL == (p = calloc(1, sizeof(struct mdoc))))
-		return(NULL);
-	if (cb)
-		(void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
-
-	p->data = data;
-	p->pflags = pflags;
-
-	if (NULL == (p->htab = mdoc_hash_alloc())) {
-		free(p);
-		return(NULL);
-	} else if (mdoc_alloc1(p))
-		return(p);
-
-	free(p);
-	return(NULL);
-}
-
-
-/*
- * Climb back up the parse tree, validating open scopes.  Mostly calls
- * through to macro_end in macro.c.
- */
-int
-mdoc_endparse(struct mdoc *m)
-{
-
-	if (MDOC_HALT & m->flags)
-		return(0);
-	else if (mdoc_macroend(m))
-		return(1);
-	m->flags |= MDOC_HALT;
-	return(0);
-}
+static	int		  mdoc_ptext(struct roff_man *, int, char *, int);
+static	int		  mdoc_pmacro(struct roff_man *, int, char *, int);
 
 
 /*
  * Main parse routine.  Parses a single line -- really just hands off to
- * the macro or text parser.
+ * the macro (mdoc_pmacro()) or text parser (mdoc_ptext()).
  */
 int
-mdoc_parseln(struct mdoc *m, int ln, char *buf)
+mdoc_parseln(struct roff_man *mdoc, int ln, char *buf, int offs)
 {
 
-	/* If in error-mode, then we parse no more. */
-
-	if (MDOC_HALT & m->flags)
-		return(0);
-
-	return('.' == *buf ? parsemacro(m, ln, buf) :
-			parsetext(m, ln, buf));
+	if (mdoc->last->type != ROFFT_EQN || ln > mdoc->last->line)
+		mdoc->flags |= MDOC_NEWLINE;
+
+	/*
+	 * Let the roff nS register switch SYNOPSIS mode early,
+	 * such that the parser knows at all times
+	 * whether this mode is on or off.
+	 * Note that this mode is also switched by the Sh macro.
+	 */
+	if (roff_getreg(mdoc->roff, "nS"))
+		mdoc->flags |= MDOC_SYNOPSIS;
+	else
+		mdoc->flags &= ~MDOC_SYNOPSIS;
+
+	return roff_getcontrol(mdoc->roff, buf, &offs) ?
+	    mdoc_pmacro(mdoc, ln, buf, offs) :
+	    mdoc_ptext(mdoc, ln, buf, offs);
 }
 
-
-int
-mdoc_verr(struct mdoc *mdoc, int ln, int pos, 
-		const char *fmt, ...)
+void
+mdoc_macro(MACRO_PROT_ARGS)
 {
-	char		 buf[256];
-	va_list		 ap;
+	assert(tok > TOKEN_NONE && tok < MDOC_MAX);
 
-	if (NULL == mdoc->cb.mdoc_err)
-		return(0);
-
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-	va_end(ap);
-	return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
+	(*mdoc_macros[tok].fp)(mdoc, tok, line, ppos, pos, buf);
 }
 
-
-int
-mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, 
-		enum mdoc_warn type, const char *fmt, ...)
+void
+mdoc_tail_alloc(struct roff_man *mdoc, int line, int pos, int tok)
 {
-	char		 buf[256];
-	va_list		 ap;
+	struct roff_node *p;
 
-	if (NULL == mdoc->cb.mdoc_warn)
-		return(0);
-
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-	va_end(ap);
-	return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
+	p = roff_node_alloc(mdoc, line, pos, ROFFT_TAIL, tok);
+	roff_node_append(mdoc, p);
+	mdoc->next = ROFF_NEXT_CHILD;
 }
 
-
-int
-mdoc_nerr(struct mdoc *mdoc, const struct mdoc_node *node, const char *fmt, ...)
+struct roff_node *
+mdoc_endbody_alloc(struct roff_man *mdoc, int line, int pos, int tok,
+		struct roff_node *body)
 {
-	char		 buf[256];
-	va_list		 ap;
-
-	if (NULL == mdoc->cb.mdoc_err)
-		return(0);
-
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-	va_end(ap);
-	return((*mdoc->cb.mdoc_err)(mdoc->data, node->line, node->pos, buf));
+	struct roff_node *p;
+
+	body->flags |= NODE_ENDED;
+	body->parent->flags |= NODE_ENDED;
+	p = roff_node_alloc(mdoc, line, pos, ROFFT_BODY, tok);
+	p->body = body;
+	p->norm = body->norm;
+	p->end = ENDBODY_SPACE;
+	roff_node_append(mdoc, p);
+	mdoc->next = ROFF_NEXT_SIBLING;
+	return p;
 }
 
-
-int
-mdoc_warn(struct mdoc *mdoc, enum mdoc_warn type, const char *fmt, ...)
+struct roff_node *
+mdoc_block_alloc(struct roff_man *mdoc, int line, int pos,
+	int tok, struct mdoc_arg *args)
 {
-	char		 buf[256];
-	va_list		 ap;
+	struct roff_node *p;
 
-	if (NULL == mdoc->cb.mdoc_warn)
-		return(0);
+	p = roff_node_alloc(mdoc, line, pos, ROFFT_BLOCK, tok);
+	p->args = args;
+	if (p->args)
+		(args->refcnt)++;
 
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-	va_end(ap);
-	return((*mdoc->cb.mdoc_warn)(mdoc->data, mdoc->last->line,
-	    mdoc->last->pos, type, buf));
+	switch (tok) {
+	case MDOC_Bd:
+	case MDOC_Bf:
+	case MDOC_Bl:
+	case MDOC_En:
+	case MDOC_Rs:
+		p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
+		break;
+	default:
+		break;
+	}
+	roff_node_append(mdoc, p);
+	mdoc->next = ROFF_NEXT_CHILD;
+	return p;
 }
 
-
-int
-mdoc_err(struct mdoc *mdoc, const char *fmt, ...)
+void
+mdoc_elem_alloc(struct roff_man *mdoc, int line, int pos,
+	int tok, struct mdoc_arg *args)
 {
-	char		 buf[256];
-	va_list		 ap;
+	struct roff_node *p;
 
-	if (NULL == mdoc->cb.mdoc_err)
-		return(0);
+	p = roff_node_alloc(mdoc, line, pos, ROFFT_ELEM, tok);
+	p->args = args;
+	if (p->args)
+		(args->refcnt)++;
 
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-	va_end(ap);
-	return((*mdoc->cb.mdoc_err)(mdoc->data, mdoc->last->line,
-	    mdoc->last->pos, buf));
+	switch (tok) {
+	case MDOC_An:
+		p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
+		break;
+	default:
+		break;
+	}
+	roff_node_append(mdoc, p);
+	mdoc->next = ROFF_NEXT_CHILD;
 }
 
-
-int
-mdoc_pwarn(struct mdoc *mdoc, int line, int pos, enum mdoc_warn type,
-		const char *fmt, ...)
+void
+mdoc_node_relink(struct roff_man *mdoc, struct roff_node *p)
 {
-	char		 buf[256];
-	va_list		 ap;
-
-	if (NULL == mdoc->cb.mdoc_warn)
-		return(0);
 
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-	va_end(ap);
-	return((*mdoc->cb.mdoc_warn)(mdoc->data, line, pos, type, buf));
+	roff_node_unlink(mdoc, p);
+	p->prev = p->next = NULL;
+	roff_node_append(mdoc, p);
 }
 
-int
-mdoc_perr(struct mdoc *mdoc, int line, int pos, const char *fmt, ...)
+/*
+ * Parse free-form text, that is, a line that does not begin with the
+ * control character.
+ */
+static int
+mdoc_ptext(struct roff_man *mdoc, int line, char *buf, int offs)
 {
-	char		 buf[256];
-	va_list		 ap;
-
-	if (NULL == mdoc->cb.mdoc_err)
-		return(0);
+	struct roff_node *n;
+	char		 *c, *ws, *end;
+
+	n = mdoc->last;
+
+	/*
+	 * If a column list contains plain text, assume an implicit item
+	 * macro.  This can happen one or more times at the beginning
+	 * of such a list, intermixed with non-It mdoc macros and with
+	 * nodes generated on the roff level, for example by tbl.
+	 */
+
+	if ((n->tok == MDOC_Bl && n->type == ROFFT_BODY &&
+	     n->end == ENDBODY_NOT && n->norm->Bl.type == LIST_column) ||
+	    (n->parent != NULL && n->parent->tok == MDOC_Bl &&
+	     n->parent->norm->Bl.type == LIST_column)) {
+		mdoc->flags |= MDOC_FREECOL;
+		mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf);
+		return 1;
+	}
 
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-	va_end(ap);
-	return((*mdoc->cb.mdoc_err)(mdoc->data, line, pos, buf));
-}
+	/*
+	 * Search for the beginning of unescaped trailing whitespace (ws)
+	 * and for the first character not to be output (end).
+	 */
+
+	/* FIXME: replace with strcspn(). */
+	ws = NULL;
+	for (c = end = buf + offs; *c; c++) {
+		switch (*c) {
+		case ' ':
+			if (NULL == ws)
+				ws = c;
+			continue;
+		case '\t':
+			/*
+			 * Always warn about trailing tabs,
+			 * even outside literal context,
+			 * where they should be put on the next line.
+			 */
+			if (NULL == ws)
+				ws = c;
+			/*
+			 * Strip trailing tabs in literal context only;
+			 * outside, they affect the next line.
+			 */
+			if (MDOC_LITERAL & mdoc->flags)
+				continue;
+			break;
+		case '\\':
+			/* Skip the escaped character, too, if any. */
+			if (c[1])
+				c++;
+			/* FALLTHROUGH */
+		default:
+			ws = NULL;
+			break;
+		}
+		end = c + 1;
+	}
+	*end = '\0';
+
+	if (ws)
+		mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
+		    line, (int)(ws-buf), NULL);
+
+	if (buf[offs] == '\0' && ! (mdoc->flags & MDOC_LITERAL)) {
+		mandoc_msg(MANDOCERR_FI_BLANK, mdoc->parse,
+		    line, (int)(c - buf), NULL);
+
+		/*
+		 * Insert a `sp' in the case of a blank line.  Technically,
+		 * blank lines aren't allowed, but enough manuals assume this
+		 * behaviour that we want to work around it.
+		 */
+		roff_elem_alloc(mdoc, line, offs, MDOC_sp);
+		mdoc->last->flags |= NODE_VALID | NODE_ENDED;
+		mdoc->next = ROFF_NEXT_SIBLING;
+		return 1;
+	}
 
+	roff_word_alloc(mdoc, line, offs, buf+offs);
 
-int
-mdoc_macro(struct mdoc *m, int tok, 
-		int ln, int pp, int *pos, char *buf)
-{
+	if (mdoc->flags & MDOC_LITERAL)
+		return 1;
 
-	/* FIXME - these should happen during validation. */
+	/*
+	 * End-of-sentence check.  If the last character is an unescaped
+	 * EOS character, then flag the node as being the end of a
+	 * sentence.  The front-end will know how to interpret this.
+	 */
 
-	if (MDOC_PROLOGUE & mdoc_macros[tok].flags && 
-			SEC_PROLOGUE != m->lastnamed)
-		return(perr(m, ln, pp, EPROLBODY));
+	assert(buf < end);
 
-	if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) && 
-			SEC_PROLOGUE == m->lastnamed)
-		return(perr(m, ln, pp, EBODYPROL));
+	if (mandoc_eos(buf+offs, (size_t)(end-buf-offs)))
+		mdoc->last->flags |= NODE_EOS;
 
-	if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
-		return(perr(m, ln, pp, ENOCALL));
+	for (c = buf + offs; c != NULL; c = strchr(c + 1, '.')) {
+		if (c - buf < offs + 2)
+			continue;
+		if (end - c < 4)
+			break;
+		if (isalpha((unsigned char)c[-2]) &&
+		    isalpha((unsigned char)c[-1]) &&
+		    c[1] == ' ' &&
+		    isupper((unsigned char)(c[2] == ' ' ? c[3] : c[2])) &&
+		    (c[-2] != 'n' || c[-1] != 'c') &&
+		    (c[-2] != 'v' || c[-1] != 's'))
+			mandoc_msg(MANDOCERR_EOS, mdoc->parse,
+			    line, (int)(c - buf), NULL);
+	}
 
-	return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
+	return 1;
 }
 
-
+/*
+ * Parse a macro line, that is, a line beginning with the control
+ * character.
+ */
 static int
-perr(struct mdoc *m, int line, int pos, enum merr type)
+mdoc_pmacro(struct roff_man *mdoc, int ln, char *buf, int offs)
 {
-	char		*p;
+	struct roff_node *n;
+	const char	 *cp;
+	int		  tok;
+	int		  i, sv;
+	char		  mac[5];
 
-	p = NULL;
-	switch (type) {
-	case (ENOCALL):
-		p = "not callable";
-		break;
-	case (EPROLBODY):
-		p = "macro disallowed in document body";
-		break;
-	case (EBODYPROL):
-		p = "macro disallowed in document prologue";
-		break;
-	case (EMALLOC):
-		p = "memory exhausted";
-		break;
-	case (ETEXTPROL):
-		p = "text disallowed in document prologue";
-		break;
-	case (ENOBLANK):
-		p = "blank lines disallowed in non-literal contexts";
-		break;
-	case (ESPACE):
-		p = "whitespace disallowed after delimiter";
-		break;
-	}
-	assert(p);
-	return(mdoc_perr(m, line, pos, p));
-}
+	sv = offs;
 
+	/*
+	 * Copy the first word into a nil-terminated buffer.
+	 * Stop when a space, tab, escape, or eoln is encountered.
+	 */
 
-static int
-node_append(struct mdoc *mdoc, struct mdoc_node *p)
-{
+	i = 0;
+	while (i < 4 && strchr(" \t\\", buf[offs]) == NULL)
+		mac[i++] = buf[offs++];
 
-	assert(mdoc->last);
-	assert(mdoc->first);
-	assert(MDOC_ROOT != p->type);
+	mac[i] = '\0';
 
-	switch (mdoc->next) {
-	case (MDOC_NEXT_SIBLING):
-		mdoc->last->next = p;
-		p->prev = mdoc->last;
-		p->parent = mdoc->last->parent;
-		break;
-	case (MDOC_NEXT_CHILD):
-		mdoc->last->child = p;
-		p->parent = mdoc->last;
-		break;
-	default:
-		abort();
-		/* NOTREACHED */
+	tok = (i > 1 && i < 4) ? mdoc_hash_find(mac) : TOKEN_NONE;
+
+	if (tok == TOKEN_NONE) {
+		mandoc_msg(MANDOCERR_MACRO, mdoc->parse,
+		    ln, sv, buf + sv - 1);
+		return 1;
 	}
 
-	if ( ! mdoc_valid_pre(mdoc, p))
-		return(0);
-	if ( ! mdoc_action_pre(mdoc, p))
-		return(0);
+	/* Skip a leading escape sequence or tab. */
 
-	switch (p->type) {
-	case (MDOC_HEAD):
-		assert(MDOC_BLOCK == p->parent->type);
-		p->parent->head = p;
+	switch (buf[offs]) {
+	case '\\':
+		cp = buf + offs + 1;
+		mandoc_escape(&cp, NULL, NULL);
+		offs = cp - buf;
 		break;
-	case (MDOC_TAIL):
-		assert(MDOC_BLOCK == p->parent->type);
-		p->parent->tail = p;
-		break;
-	case (MDOC_BODY):
-		assert(MDOC_BLOCK == p->parent->type);
-		p->parent->body = p;
+	case '\t':
+		offs++;
 		break;
 	default:
 		break;
 	}
 
-	mdoc->last = p;
+	/* Jump to the next non-whitespace word. */
 
-	switch (p->type) {
-	case (MDOC_TEXT):
-		if ( ! mdoc_valid_post(mdoc))
-			return(0);
-		if ( ! mdoc_action_post(mdoc))
-			return(0);
-		break;
-	default:
-		break;
-	}
+	while (buf[offs] && ' ' == buf[offs])
+		offs++;
 
-	return(1);
-}
+	/*
+	 * Trailing whitespace.  Note that tabs are allowed to be passed
+	 * into the parser as "text", so we only warn about spaces here.
+	 */
 
+	if ('\0' == buf[offs] && ' ' == buf[offs - 1])
+		mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
+		    ln, offs - 1, NULL);
 
-static struct mdoc_node *
-node_alloc(struct mdoc *mdoc, int line, 
-		int pos, int tok, enum mdoc_type type)
-{
-	struct mdoc_node *p;
+	/*
+	 * If an initial macro or a list invocation, divert directly
+	 * into macro processing.
+	 */
 
-	if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
-		(void)verr(mdoc, EMALLOC);
-		return(NULL);
+	n = mdoc->last;
+	if (n == NULL || tok == MDOC_It || tok == MDOC_El) {
+		mdoc_macro(mdoc, tok, ln, sv, &offs, buf);
+		return 1;
 	}
 
-	p->sec = mdoc->lastsec;
-	p->line = line;
-	p->pos = pos;
-	p->tok = tok;
-	if (MDOC_TEXT != (p->type = type))
-		assert(p->tok >= 0);
-
-	return(p);
-}
-
-
-int
-mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
-{
-	struct mdoc_node *p;
-
-	p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
-	if (NULL == p)
-		return(0);
-	return(node_append(mdoc, p));
-}
-
-
-int
-mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
-{
-	struct mdoc_node *p;
-
-	assert(mdoc->first);
-	assert(mdoc->last);
-
-	p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
-	if (NULL == p)
-		return(0);
-	return(node_append(mdoc, p));
-}
-
-
-int
-mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
-{
-	struct mdoc_node *p;
-
-	p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
-	if (NULL == p)
-		return(0);
-	return(node_append(mdoc, p));
-}
-
-
-int
-mdoc_block_alloc(struct mdoc *mdoc, int line, int pos, 
-		int tok, struct mdoc_arg *args)
-{
-	struct mdoc_node *p;
-
-	p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
-	if (NULL == p)
-		return(0);
-	p->args = args;
-	if (p->args)
-		(args->refcnt)++;
-	return(node_append(mdoc, p));
-}
-
-
-int
-mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos, 
-		int tok, struct mdoc_arg *args)
-{
-	struct mdoc_node *p;
-
-	p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
-	if (NULL == p)
-		return(0);
-	p->args = args;
-	if (p->args)
-		(args->refcnt)++;
-	return(node_append(mdoc, p));
-}
-
-
-int
-mdoc_word_alloc(struct mdoc *mdoc, 
-		int line, int pos, const char *word)
-{
-	struct mdoc_node *p;
-
-	p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
-	if (NULL == p)
-		return(0);
-	if (NULL == (p->string = strdup(word))) {
-		(void)verr(mdoc, EMALLOC);
-		return(0);
+	/*
+	 * If a column list contains a non-It macro, assume an implicit
+	 * item macro.  This can happen one or more times at the
+	 * beginning of such a list, intermixed with text lines and
+	 * with nodes generated on the roff level, for example by tbl.
+	 */
+
+	if ((n->tok == MDOC_Bl && n->type == ROFFT_BODY &&
+	     n->end == ENDBODY_NOT && n->norm->Bl.type == LIST_column) ||
+	    (n->parent != NULL && n->parent->tok == MDOC_Bl &&
+	     n->parent->norm->Bl.type == LIST_column)) {
+		mdoc->flags |= MDOC_FREECOL;
+		mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf);
+		return 1;
 	}
-	return(node_append(mdoc, p));
-}
-
-
-void
-mdoc_node_free(struct mdoc_node *p)
-{
 
-	if (p->string)
-		free(p->string);
-	if (p->args)
-		mdoc_argv_free(p->args);
-	free(p);
-}
+	/* Normal processing of a macro. */
 
+	mdoc_macro(mdoc, tok, ln, sv, &offs, buf);
 
-void
-mdoc_node_freelist(struct mdoc_node *p)
-{
+	/* In quick mode (for mandocdb), abort after the NAME section. */
 
-	if (p->child)
-		mdoc_node_freelist(p->child);
-	if (p->next)
-		mdoc_node_freelist(p->next);
+	if (mdoc->quick && MDOC_Sh == tok &&
+	    SEC_NAME != mdoc->last->sec)
+		return 2;
 
-	mdoc_node_free(p);
+	return 1;
 }
 
-
-/*
- * Parse free-form text, that is, a line that does not begin with the
- * control character.
- */
-static int
-parsetext(struct mdoc *m, int line, char *buf)
+enum mdelim
+mdoc_isdelim(const char *p)
 {
 
-	if (SEC_PROLOGUE == m->lastnamed)
-		return(perr(m, line, 0, ETEXTPROL));
-
-	if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
-		return(perr(m, line, 0, ENOBLANK));
-
-	if ( ! mdoc_word_alloc(m, line, 0, buf))
-		return(0);
-
-	m->next = MDOC_NEXT_SIBLING;
-	return(1);
+	if ('\0' == p[0])
+		return DELIM_NONE;
+
+	if ('\0' == p[1])
+		switch (p[0]) {
+		case '(':
+		case '[':
+			return DELIM_OPEN;
+		case '|':
+			return DELIM_MIDDLE;
+		case '.':
+		case ',':
+		case ';':
+		case ':':
+		case '?':
+		case '!':
+		case ')':
+		case ']':
+			return DELIM_CLOSE;
+		default:
+			return DELIM_NONE;
+		}
+
+	if ('\\' != p[0])
+		return DELIM_NONE;
+
+	if (0 == strcmp(p + 1, "."))
+		return DELIM_CLOSE;
+	if (0 == strcmp(p + 1, "fR|\\fP"))
+		return DELIM_MIDDLE;
+
+	return DELIM_NONE;
 }
 
-
-static int
-macrowarn(struct mdoc *m, int ln, const char *buf)
-{
-	if ( ! (MDOC_IGN_MACRO & m->pflags))
-		return(mdoc_perr(m, ln, 1, 
-				"unknown macro: %s%s", 
-				buf, strlen(buf) > 3 ? "..." : ""));
-	return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
-				"unknown macro: %s%s",
-				buf, strlen(buf) > 3 ? "..." : ""));
-}
-
-
-
-/*
- * Parse a macro line, that is, a line beginning with the control
- * character.
- */
-int
-parsemacro(struct mdoc *m, int ln, char *buf)
+void
+mdoc_validate(struct roff_man *mdoc)
 {
-	int		  i, c;
-	char		  mac[5];
-
-	/* Empty lines are ignored. */
-
-	if (0 == buf[1])
-		return(1);
-
-	if (' ' == buf[1]) {
-		i = 2;
-		while (buf[i] && ' ' == buf[i])
-			i++;
-		if (0 == buf[i])
-			return(1);
-		return(perr(m, ln, 1, ESPACE));
-	}
-
-	/* Copy the first word into a nil-terminated buffer. */
-
-	for (i = 1; i < 5; i++) {
-		if (0 == (mac[i - 1] = buf[i]))
-			break;
-		else if (' ' == buf[i])
-			break;
-	}
-
-	mac[i - 1] = 0;
-
-	if (i == 5 || i <= 2) {
-		if ( ! macrowarn(m, ln, mac))
-			goto err;
-		return(1);
-	} 
-	
-	if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
-		if ( ! macrowarn(m, ln, mac))
-			goto err;
-		return(1);
-	}
-
-	/* The macro is sane.  Jump to the next word. */
-
-	while (buf[i] && ' ' == buf[i])
-		i++;
-
-	/* Begin recursive parse sequence. */
-
-	if ( ! mdoc_macro(m, c, ln, 1, &i, buf)) 
-		goto err;
-
-	return(1);
-
-err:	/* Error out. */
 
-	m->flags |= MDOC_HALT;
-	return(0);
+	mdoc->last = mdoc->first;
+	mdoc_node_validate(mdoc);
+	mdoc_state_reset(mdoc);
 }