Implement the \N'number' (numbered character) roff escape sequence.

Don't use it in new manuals, it is inherently non-portable, but we
need it for backward-compatibility with existing manuals, for example
in Xenocara driver pages.
ok kristaps@ jmc@ and tested by Matthieu Herrb (matthieu at openbsd dot org)

1 files changed, 17 insertions, 1 deletions

diff --git a/html.c b/html.c
index 846d98ef..af9fdb1a 100644
--- a/html.c
+++ b/html.c
@@ -1,6 +1,7 @@
 /*	$Id$ */
 /*
- * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011 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
@@ -93,6 +94,7 @@ static	const char	*const htmlattrs[ATTR_MAX] = {
 	"colspan", /* ATTR_COLSPAN */
 };
 
+static	void		  print_num(struct html *, const char *, size_t);
 static	void		  print_spec(struct html *, enum roffdeco,
 				const char *, size_t);
 static	void		  print_res(struct html *, const char *, size_t);
@@ -214,6 +216,17 @@ print_gen_head(struct html *h)
 
 
 static void
+print_num(struct html *h, const char *p, size_t len)
+{
+	const char	*rhs;
+
+	rhs = chars_num2char(p, len);
+	if (rhs)
+		putchar((int)*rhs);
+}
+
+
+static void
 print_spec(struct html *h, enum roffdeco d, const char *p, size_t len)
 {
 	int		 cp;
@@ -333,6 +346,9 @@ print_encode(struct html *h, const char *p, int norecurse)
 		len = a2roffdeco(&deco, &seq, &sz);
 
 		switch (deco) {
+		case (DECO_NUMBERED):
+			print_num(h, seq, sz);
+			break;
 		case (DECO_RESERVED):
 			print_res(h, seq, sz);
 			break;