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When searching for tabs, start from screen width, fixes out-of-bounds

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read found by Kuang-che Wu.
This commit is contained in:
nicm
2015-08-25 15:00:05 +00:00
parent 3219e0314e
commit 2ffbd5b5f0
1 changed files with 8 additions and 3 deletions
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11
input.c
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@@ -1199,6 +1199,7 @@ input_csi_dispatch(struct input_ctx *ictx)
struct screen *s = sctx->s;
struct input_table_entry *entry;
int n, m;
u_int cx;
if (ictx->flags & INPUT_DISCARD)
return (0);
@@ -1217,12 +1218,16 @@ input_csi_dispatch(struct input_ctx *ictx)
switch (entry->type) {
case INPUT_CSI_CBT:
/* Find the previous tab point, n times. */
cx = s->cx;
if (cx > screen_size_x(s) - 1)
cx = screen_size_x(s) - 1;
n = input_get(ictx, 0, 1, 1);
while (s->cx > 0 && n-- > 0) {
while (cx > 0 && n-- > 0) {
do
s->cx--;
while (s->cx > 0 && !bit_test(s->tabs, s->cx));
cx--;
while (cx > 0 && !bit_test(s->tabs, cx));
}
s->cx = cx;
break;
case INPUT_CSI_CUB:
screen_write_cursorleft(sctx, input_get(ictx, 0, 1, 1));