[PATCH 11/45] tty: vt: define an enum for CSI+J codes

Jiri Slaby (SUSE)
2024-01-18T07:58:23Z

Decrypt the constant values by proper enum names. This time in csi_J().

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
drivers/tty/vt/vt.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 66ebc90a9fe9..4f7831f81db6 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1498,13 +1498,20 @@ static inline void del(struct vc_data *vc)
/* ignored */
}

+enum {
+ CSI_J_CURSOR_TO_END = 0,
+ CSI_J_START_TO_CURSOR = 1,
+ CSI_J_VISIBLE = 2,
+ CSI_J_FULL = 3,
+};
+
static void csi_J(struct vc_data *vc, int vpar)
{
unsigned int count;
unsigned short * start;

switch (vpar) {
- case 0: /* erase from cursor to end of display */
+ case CSI_J_CURSOR_TO_END:
vc_uniscr_clear_line(vc, vc->state.x,
vc->vc_cols - vc->state.x);
vc_uniscr_clear_lines(vc, vc->state.y + 1,
@@ -1512,16 +1519,16 @@ static void csi_J(struct vc_data *vc, int vpar)
count = (vc->vc_scr_end - vc->vc_pos) >> 1;
start = (unsigned short *)vc->vc_pos;
break;
- case 1: /* erase from start to cursor */
+ case CSI_J_START_TO_CURSOR:
vc_uniscr_clear_line(vc, 0, vc->state.x + 1);
vc_uniscr_clear_lines(vc, 0, vc->state.y);
count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
start = (unsigned short *)vc->vc_origin;
break;
- case 3: /* include scrollback */
+ case CSI_J_FULL:
flush_scrollback(vc);
fallthrough;
- case 2: /* erase whole display */
+ case CSI_J_VISIBLE:
vc_uniscr_clear_lines(vc, 0, vc->vc_rows);
count = vc->vc_cols * vc->vc_rows;
start = (unsigned short *)vc->vc_origin;
--
2.43.0