mdocml: better handle .Fo and .Fd without argument better handle .Fo

[schwarze@mdocml.bsd.lv]

Log Message:
-----------
better handle .Fo and .Fd without argument
better handle .Fo with more than one argument

Modified Files:
--------------
    mdocml:
        mandoc.1
        mandoc.h
        mdoc_macro.c
        mdoc_man.c
        mdoc_validate.c
        read.c

Revision Data
-------------
Index: mdoc_macro.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_macro.c,v
retrieving revision 1.177
retrieving revision 1.178
diff -Lmdoc_macro.c -Lmdoc_macro.c -u -p -r1.177 -r1.178
--- mdoc_macro.c
+++ mdoc_macro.c
@@ -1403,6 +1403,12 @@ in_line_eoln(MACRO_PROT_ARGS)
 			rew_last(mdoc, mdoc->last->parent);
 	}
 
+	if (buf[*pos] == '\0' && tok == MDOC_Fd) {
+		mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
+		    line, ppos, "Fd");
+		return;
+	}
+
 	mdoc_argv(mdoc, line, tok, &arg, pos, buf);
 	mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
 	if (parse_rest(mdoc, tok, line, pos, buf))
Index: mdoc_validate.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_validate.c,v
retrieving revision 1.273
retrieving revision 1.274
diff -Lmdoc_validate.c -Lmdoc_validate.c -u -p -r1.273 -r1.274
--- mdoc_validate.c
+++ mdoc_validate.c
@@ -67,7 +67,6 @@ static	enum mdoc_sec	a2sec(const char *)
 static	size_t		macro2len(enum mdoct);
 static	void	 rewrite_macro2len(char **);
 
-static	void	 bwarn_ge1(POST_ARGS);
 static	void	 ewarn_eq1(POST_ARGS);
 static	void	 ewarn_ge1(POST_ARGS);
 
@@ -151,7 +150,7 @@ static	const struct valids mdoc_valids[M
 	{ NULL, NULL },				/* Ev */
 	{ pre_std, post_ex },			/* Ex */
 	{ NULL, post_fa },			/* Fa */
-	{ NULL, ewarn_ge1 },			/* Fd */
+	{ NULL, NULL },				/* Fd */
 	{ NULL, NULL },				/* Fl */
 	{ NULL, post_fn },			/* Fn */
 	{ NULL, NULL },				/* Ft */
@@ -402,12 +401,6 @@ check_count(struct mdoc *mdoc, enum mdoc
 }
 
 static void
-bwarn_ge1(POST_ARGS)
-{
-	check_count(mdoc, MDOC_BODY, CHECK_GT, 0);
-}
-
-static void
 ewarn_eq1(POST_ARGS)
 {
 	check_count(mdoc, MDOC_ELEM, CHECK_EQ, 1);
@@ -980,11 +973,27 @@ post_fn(POST_ARGS)
 static void
 post_fo(POST_ARGS)
 {
+	const struct mdoc_node	*n;
+
+	n = mdoc->last;
 
-	check_count(mdoc, MDOC_HEAD, CHECK_EQ, 1);
-	bwarn_ge1(mdoc);
-	if (mdoc->last->type == MDOC_HEAD && mdoc->last->nchild)
-		post_fname(mdoc);
+	if (n->type != MDOC_HEAD)
+		return;
+
+	if (n->child == NULL) {
+		mandoc_msg(MANDOCERR_FO_NOHEAD, mdoc->parse,
+		    n->line, n->pos, "Fo");
+		return;
+	}
+	if (n->child != n->last) {
+		mandoc_vmsg(MANDOCERR_ARG_EXCESS, mdoc->parse,
+		    n->child->next->line, n->child->next->pos,
+		    "Fo ... %s", n->child->next->string);
+		while (n->child != n->last)
+			mdoc_node_delete(mdoc, n->last);
+	}
+
+	post_fname(mdoc);
 }
 
 static void
Index: read.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/read.c,v
retrieving revision 1.122
retrieving revision 1.123
diff -Lread.c -Lread.c -u -p -r1.122 -r1.123
--- read.c
+++ read.c
@@ -142,6 +142,7 @@ static	const char * const	mandocerrs[MAN
 	"list type is not the first argument",
 	"missing -width in -tag list, using 8n",
 	"missing utility name, using \"\"",
+	"missing function name, using \"\"",
 	"empty head in list item",
 	"empty list item",
 	"missing font type, using \\fR",
Index: mandoc.1
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mandoc.1,v
retrieving revision 1.145
retrieving revision 1.146
diff -Lmandoc.1 -Lmandoc.1 -u -p -r1.145 -r1.146
--- mandoc.1
+++ mandoc.1
@@ -1042,6 +1042,12 @@ The
 macro is called without an argument before
 .Ic \&Nm
 has first been called with an argument.
+.It Sy "missing function name, using \(dq\(dq"
+.Pq mdoc
+The
+.Ic \&Fo
+macro is called without an argument.
+No function name is printed.
 .It Sy "empty head in list item"
 .Pq mdoc
 In a
@@ -1637,6 +1643,8 @@ macro is invoked with another argument a
 .Fl split
 or
 .Fl nosplit ,
+.Ic \&Fo
+is invoked with more than one argument,
 .Ic \&Bd ,
 .Ic \&Bk ,
 or
Index: mdoc_man.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_man.c,v
retrieving revision 1.84
retrieving revision 1.85
diff -Lmdoc_man.c -Lmdoc_man.c -u -p -r1.84 -r1.85
--- mdoc_man.c
+++ mdoc_man.c
@@ -1284,12 +1284,14 @@ pre_fo(DECL_ARGS)
 		pre_syn(n);
 		break;
 	case MDOC_HEAD:
+		if (n->child == NULL)
+			return(0);
 		if (MDOC_SYNPRETTY & n->flags)
 			print_block(".HP 4n", MMAN_nl);
 		font_push('B');
 		break;
 	case MDOC_BODY:
-		outflags &= ~MMAN_spc;
+		outflags &= ~(MMAN_spc | MMAN_nl);
 		print_word("(");
 		outflags &= ~MMAN_spc;
 		break;
@@ -1305,7 +1307,8 @@ post_fo(DECL_ARGS)
 
 	switch (n->type) {
 	case MDOC_HEAD:
-		font_pop();
+		if (n->child != NULL)
+			font_pop();
 		break;
 	case MDOC_BODY:
 		post_fn(meta, n);
Index: mandoc.h
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mandoc.h,v
retrieving revision 1.196
retrieving revision 1.197
diff -Lmandoc.h -Lmandoc.h -u -p -r1.196 -r1.197
--- mandoc.h
+++ mandoc.h
@@ -98,6 +98,7 @@ enum	mandocerr {
 	MANDOCERR_BL_LATETYPE, /* list type is not the first argument: Bl arg */
 	MANDOCERR_BL_NOWIDTH, /* missing -width in -tag list, using 8n */
 	MANDOCERR_EX_NONAME, /* missing utility name, using "": Ex */
+	MANDOCERR_FO_NOHEAD, /* missing function name, using "": Fo */
 	MANDOCERR_IT_NOHEAD, /* empty head in list item: Bl -type It */
 	MANDOCERR_IT_NOBODY, /* empty list item: Bl -type It */
 	MANDOCERR_BF_NOFONT, /* missing font type, using \fR: Bf */
--
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