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Fix Slice underflow.

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This commit is contained in:
levlam 2021-05-14 13:18:52 +03:00
parent 083d599c41
commit add28462a0
2 changed files with 2 additions and 1 deletions
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2
td/telegram/MessageEntity.cpp
View File

@ -628,7 +628,7 @@ static vector<Slice> match_urls(Slice str) {
}
path_end_ptr = next_ptr;
}
while (bad_path_end_chars.find(path_end_ptr[-1]) < bad_path_end_chars.size()) {
while (path_end_ptr > url_end_ptr + 1 && bad_path_end_chars.find(path_end_ptr[-1]) < bad_path_end_chars.size()) {
path_end_ptr--;
}
if (url_end_ptr[0] == '/' || path_end_ptr > url_end_ptr + 1) {

1
test/message_entities.cpp
View File

@ -582,6 +582,7 @@ TEST(MessageEntities, url) {
check_url("https://t…", {});
check_url("👉http://ab.com/cdefgh-1IJ", {"http://ab.com/cdefgh-1IJ"});
check_url("...👉http://ab.com/cdefgh-1IJ", {}); // TODO
check_url(".?", {});
}
static void check_fix_formatted_text(td::string str, td::vector<td::MessageEntity> entities,