mirrors/foot
1
0
Fork 0
mirror of https://codeberg.org/dnkl/foot.git synced 2026-03-13 05:33:51 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

search: fix infinite loop when highlighting all matches

Browse source 
find_next() did not always terminate correctly, causing
search_matches_next() to never terminate, which finally leads to an
infinite loop when rendering the search overlay surface, while finding
all matches to highlight.

The problem is that find_next(), after having found the initial
matching characters, enters a nested while loop that tries to match
the rest of the search criteria. This inner while loop did not check
if we’ve reached the last cell, and happily continued past
it (eventually wrappping around the scrollback buffer).

Closes #1047
This commit is contained in:
Daniel Eklöf 2022-04-26 18:24:22 +02:00
parent 694938b85b
commit 0e9ebf433b
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
2 changed files with 16 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

13
search.c
View file

@ -375,6 +375,13 @@ find_next(struct terminal *term, enum search_direction direction,
if (match_len != term->search.len) {
/* Didn't match (completely) */
if (match_start_row == abs_end.row &&
match_start_col == abs_end.col)
{
break;
}
continue;
}
@ -563,10 +570,16 @@ search_matches_next(struct search_match_iterator *iter)
xassert(match.end.row >= 0);
xassert(match.end.row < term->rows);
/* Assert match end comes *after* the match start */
xassert(match.end.row > match.start.row ||
(match.end.row == match.start.row &&
match.end.col >= match.start.col));
/* Assert the match starts at, or after, the iterator position */
xassert(match.start.row > iter->start.row ||
(match.start.row == iter->start.row &&
match.start.col >= iter->start.col));
/* Continue at next column, next time */
iter->start.row = match.start.row;
iter->start.col = match.start.col + 1;