Improve handling of next-line scope broken by end of file.

Detect the condition earlier, report in the error message
which block is broken, and delete the broken block.
Consequently, empty section headers can no longer happen.

2 files changed, 34 insertions, 30 deletions

diff --git a/man_macro.c b/man_macro.c
index c8aa4018..ea45a504 100644
--- a/man_macro.c
+++ b/man_macro.c
@@ -1,4 +1,4 @@
-/*	$Id: man_macro.c,v 1.86 2014/07/30 21:18:24 schwarze Exp $ */
+/*	$Id: man_macro.c,v 1.87 2014/07/30 23:01:39 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
@@ -104,13 +104,35 @@ man_unscope(struct man *man, const struct man_node *to)
 	to = to->parent;
 	n = man->last;
 	while (n != to) {
-		if (NULL == to &&
-		    MAN_BLOCK == n->type &&
-		    0 == (MAN_VALID & n->flags) &&
-		    MAN_EXPLICIT & man_macros[n->tok].flags)
-			mandoc_msg(MANDOCERR_BLK_NOEND,
-			    man->parse, n->line, n->pos,
-			    man_macronames[n->tok]);
+
+		/* Reached the end of the document? */
+
+		if (to == NULL && ! (n->flags & MAN_VALID)) {
+			if (man->flags & (MAN_BLINE | MAN_ELINE) &&
+			    man_macros[n->tok].flags & MAN_SCOPED) {
+				mandoc_vmsg(MANDOCERR_BLK_LINE,
+				    man->parse, n->line, n->pos,
+				    "EOF breaks %s",
+				    man_macronames[n->tok]);
+				if (man->flags & MAN_ELINE)
+					man->flags &= ~MAN_ELINE;
+				else {
+					assert(n->type == MAN_HEAD);
+					n = n->parent;
+					man->flags &= ~MAN_BLINE;
+				}
+				man->last = n;
+				n = n->parent;
+				man_node_delete(man, man->last);
+				continue;
+			}
+			if (n->type == MAN_BLOCK &&
+			    man_macros[n->tok].flags & MAN_EXPLICIT)
+				mandoc_msg(MANDOCERR_BLK_NOEND,
+				    man->parse, n->line, n->pos,
+				    man_macronames[n->tok]);
+		}
+
 		/*
 		 * We might delete the man->last node
 		 * in the post-validation phase.
diff --git a/man_validate.c b/man_validate.c
index bb268c99..706f6949 100644
--- a/man_validate.c
+++ b/man_validate.c
@@ -1,4 +1,4 @@
-/*	$Id: man_validate.c,v 1.100 2014/07/07 21:36:20 schwarze Exp $ */
+/*	$Id: man_validate.c,v 1.101 2014/07/30 23:01:39 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -62,7 +62,6 @@ static	int	  post_vs(CHKARGS);
 static	int	  post_fi(CHKARGS);
 static	int	  post_ft(CHKARGS);
 static	int	  post_nf(CHKARGS);
-static	int	  post_sec(CHKARGS);
 static	int	  post_TH(CHKARGS);
 static	int	  post_UC(CHKARGS);
 static	int	  pre_sec(CHKARGS);
@@ -78,7 +77,6 @@ static	v_check	  posts_le1[] = { check_le1, NULL };
 static	v_check	  posts_nf[] = { check_eq0, post_nf, NULL };
 static	v_check	  posts_par[] = { check_par, NULL };
 static	v_check	  posts_part[] = { check_part, NULL };
-static	v_check	  posts_sec[] = { post_sec, NULL };
 static	v_check	  posts_sp[] = { post_vs, check_le1, NULL };
 static	v_check	  posts_th[] = { check_ge2, check_le5, post_TH, NULL };
 static	v_check	  posts_uc[] = { post_UC, NULL };
@@ -88,8 +86,8 @@ static	v_check	  pres_sec[] = { pre_sec, NULL };
 static	const struct man_valid man_valids[MAN_MAX] = {
 	{ NULL, posts_br }, /* br */
 	{ NULL, posts_th }, /* TH */
-	{ pres_sec, posts_sec }, /* SH */
-	{ pres_sec, posts_sec }, /* SS */
+	{ pres_sec, NULL }, /* SH */
+	{ pres_sec, NULL }, /* SS */
 	{ NULL, NULL }, /* TP */
 	{ NULL, posts_par }, /* LP */
 	{ NULL, posts_par }, /* PP */
@@ -190,12 +188,7 @@ static int
 check_root(CHKARGS)
 {
 
-	if ((MAN_BLINE | MAN_ELINE) & man->flags)
-		mandoc_msg(MANDOCERR_BLK_LINE, man->parse,
-		    0, 0, "at end of file");
-
-	man->flags &= ~MAN_BLINE;
-	man->flags &= ~MAN_ELINE;
+	assert((man->flags & (MAN_BLINE | MAN_ELINE)) == 0);
 
 	if (NULL == man->first->child)
 		man_nmsg(man, n, MANDOCERR_DOC_EMPTY);
@@ -325,17 +318,6 @@ pre_sec(CHKARGS)
 }
 
 static int
-post_sec(CHKARGS)
-{
-
-	if ( ! (MAN_HEAD == n->type && 0 == n->nchild))
-		return(1);
-
-	man_nmsg(man, n, MANDOCERR_SYNTARGCOUNT);
-	return(0);
-}
-
-static int
 check_part(CHKARGS)
 {