From 3eb27bf0a7b229d523bcc059b90784cfd7b908db Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Sun, 21 Oct 2018 08:29:36 +0000
Subject: [PATCH] Implement ECMA-48 "REP", some Linuxen have started emitting
 them recently.

Approved by:	ed
---
 sys/teken/gensequences |  1 +
 sys/teken/sequences    |  3 +++
 sys/teken/teken.h      |  1 +
 sys/teken/teken_subr.h | 12 +++++++++++-
 4 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/sys/teken/gensequences b/sys/teken/gensequences
index a18e7a12fe0..49cd771ed06 100644
--- a/sys/teken/gensequences
+++ b/sys/teken/gensequences
@@ -158,6 +158,7 @@ for (p in l_prefix_name) {
 
 	if (l_prefix_name[p] != "teken_state_init") {
 		print "";
+		print "\tt->t_last = 0;";
 		print "\tteken_state_switch(t, teken_state_init);";
 	}
 	print "}";
diff --git a/sys/teken/sequences b/sys/teken/sequences
index 0224584bea2..921dcce5669 100644
--- a/sys/teken/sequences
+++ b/sys/teken/sequences
@@ -114,3 +114,6 @@ C25VTSW		Cons25 switch virtual terminal		^[ [ z		r
 
 # VT52 compatibility
 #DECID		VT52 DECID				^[ Z
+
+# ECMA-48
+REP		Repeat last graphic char		^[ [ b		n
diff --git a/sys/teken/teken.h b/sys/teken/teken.h
index 0186fedb20d..5ee2474ed45 100644
--- a/sys/teken/teken.h
+++ b/sys/teken/teken.h
@@ -157,6 +157,7 @@ struct __teken {
 
 	unsigned int	 t_utf8_left;
 	teken_char_t	 t_utf8_partial;
+	teken_char_t	 t_last;
 
 	unsigned int	 t_curscs;
 	teken_scs_t	*t_saved_curscs;
diff --git a/sys/teken/teken_subr.h b/sys/teken/teken_subr.h
index c69fe76bfb1..c9dfa4d9bb9 100644
--- a/sys/teken/teken_subr.h
+++ b/sys/teken/teken_subr.h
@@ -796,10 +796,11 @@ teken_subr_primary_device_attributes(const teken_t *t, unsigned int request)
 }
 
 static void
-teken_subr_do_putchar(const teken_t *t, const teken_pos_t *tp, teken_char_t c,
+teken_subr_do_putchar(teken_t *t, const teken_pos_t *tp, teken_char_t c,
     int width)
 {
 
+	t->t_last = c;
 	if (t->t_stateflags & TS_INSERT &&
 	    tp->tp_col < t->t_winsize.tp_col - width) {
 		teken_rect_t ctr;
@@ -1332,3 +1333,12 @@ teken_subr_vertical_position_absolute(teken_t *t, unsigned int row)
 	t->t_stateflags &= ~TS_WRAPPED;
 	teken_funcs_cursor(t);
 }
+
+static void
+teken_subr_repeat_last_graphic_char(teken_t *t, unsigned int rpts)
+{
+
+	for (; t->t_last != 0 && rpts > 0; rpts--)
+		teken_subr_regular_character(t, t->t_last);
+}
+