Commit 68e7a421 authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Greg Kroah-Hartman
Browse files

vt: make sure displayed double-width characters are remembered as such 



And to do so we ensure the Unicode screen buffer is initialized when
double-width characters are encountered.

Signed-off-by: default avatarNicolas Pitre <npitre@baylibre.com>
Link: https://lore.kernel.org/r/20250507141535.40655-3-nico@fluxnic.net


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a16014c0

drivers/tty/vt/vt.c

+8 −1
Original line number Diff line number Diff line
@@ -2930,8 +2930,15 @@ static int vc_process_ucs(struct vc_data *vc, int *c, int *tc) 
{

	u32 prev_c, curr_c = *c;



	if (ucs_is_double_width(curr_c))

	if (ucs_is_double_width(curr_c)) {

		/*

		 * The Unicode screen memory is allocated only when

		 * required. This is one such case as we need to remember

		 * which displayed characters are double-width.

		 */

		vc_uniscr_check(vc);

		return 2;

	}



	if (!ucs_is_zero_width(curr_c))

		return 1;