patch 9.1.0406: Divide by zero with getmousepos() and 'smoothscroll'
Problem: Divide by zero with getmousepos() and 'smoothscroll'.
Solution: Don't compute skip_lines when width1 is zero.
(zeertzjq)
closes: #14747
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/mouse.c b/src/mouse.c
index 247c6df..4e10e72 100644
--- a/src/mouse.c
+++ b/src/mouse.c
@@ -3029,16 +3029,22 @@
if (win->w_skipcol > 0 && lnum == win->w_topline)
{
- // Adjust for 'smoothscroll' clipping the top screen lines.
- // A similar formula is used in curs_columns().
int width1 = win->w_width - win_col_off(win);
- int skip_lines = 0;
- if (win->w_skipcol > width1)
- skip_lines = (win->w_skipcol - width1)
+
+ if (width1 > 0)
+ {
+ int skip_lines = 0;
+
+ // Adjust for 'smoothscroll' clipping the top screen lines.
+ // A similar formula is used in curs_columns().
+ if (win->w_skipcol > width1)
+ skip_lines = (win->w_skipcol - width1)
/ (width1 + win_col_off2(win)) + 1;
- else if (win->w_skipcol > 0)
- skip_lines = 1;
- count -= skip_lines;
+ else if (win->w_skipcol > 0)
+ skip_lines = 1;
+
+ count -= skip_lines;
+ }
}
if (count > row)