szaszm commented on code in PR #1387:
URL: https://github.com/apache/nifi-minifi-cpp/pull/1387#discussion_r974441805
##########
libminifi/src/utils/RegexUtils.cpp:
##########
@@ -279,13 +372,39 @@ SMatch getLastRegexMatch(const std::string& string, const
utils::Regex& regex) {
current_str = search_result.suffix();
}
- auto diff = string.size() - last_match.string_.size();
- last_match.string_ = string;
+ if (!last_match.ready()) {
+ return last_match;
+ }
+
+ struct MatchInfo {
+ bool matched;
+ size_t begin;
+ size_t end;
+ };
+
+ // we must save the sub matches' info in a way that does
+ // not get invalidated by SMatch::reset, and can be transferred
+ // to the updated match
+ std::vector<MatchInfo> match_infos;
+ match_infos.reserve(last_match.size());
for (auto& match : last_match.matches_) {
- if (match.match.rm_so >= 0) {
- match.match.rm_so += diff;
- match.match.rm_eo += diff;
- }
+ match_infos.emplace_back(MatchInfo{
+ .matched = match.matched,
+ .begin = gsl::narrow<size_t>(std::distance(last_match.string_.cbegin(),
match.first)),
+ .end = gsl::narrow<size_t>(std::distance(last_match.string_.cbegin(),
match.second))
+ });
+ }
+ // offset of the start of the last match into the original string
+ auto offset = string.size() - last_match.string_.size();
+ last_match.reset(string);
+ last_match.ready_ = true;
+ for (auto& info : match_infos) {
+ size_t match_off = info.matched ? offset : 0;
+ last_match.matches_.emplace_back(SMatch::Regmatch{
Review Comment:
I would use push_back here for stronger type checking.
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