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Tune QPDF::getCompressibleObjGens 

Change set visited to std::vector<bool>
This commit is contained in:
m-holger 2024-01-06 14:37:05 +00:00
parent 6195499598
commit ba477e0b33
1 changed files with 9 additions and 3 deletions
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12
libqpdf/QPDF.cc
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@ -2376,20 +2376,26 @@ QPDF::getCompressibleObjGens()
QPDFObjectHandle encryption_dict = m->trailer.getKey("/Encrypt");
QPDFObjGen encryption_dict_og = encryption_dict.getObjGen();
QPDFObjGen::set visited;
const size_t max_obj = getObjectCount();
std::vector<bool> visited(max_obj, false);
std::vector<QPDFObjectHandle> queue;
queue.reserve(512);
queue.push_back(m->trailer);
std::vector<QPDFObjGen> result;
while (!queue.empty()) {
QPDFObjectHandle obj = queue.back();
auto obj = queue.back();
queue.pop_back();
if (obj.isIndirect()) {
QPDFObjGen og = obj.getObjGen();
if (!visited.add(og)) {
const size_t id = toS(og.getObj() - 1);
if (id >= max_obj)
throw std::runtime_error(
"unexpected object id encountered in getCompressibleObjGens");
if (visited[id]) {
QTC::TC("qpdf", "QPDF loop detected traversing objects");
continue;
}
visited[id] = true;
if (og == encryption_dict_og) {
QTC::TC("qpdf", "QPDF exclude encryption dictionary");
} else if (!(obj.isStream() ||