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Use QPDFObjGen::set in NNTree

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This commit is contained in:
m-holger 2023-01-05 11:35:44 +00:00
parent 9b08017217
commit 0e81ffa7b6
1 changed files with 13 additions and 20 deletions
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33
libqpdf/NNTree.cc
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@ -638,26 +638,21 @@ NNTreeIterator::deepen(QPDFObjectHandle node, bool first, bool allow_empty)
auto opath = this->path;
bool failed = false;
std::set<QPDFObjGen> seen;
QPDFObjGen::set seen;
for (auto i: this->path) {
if (i.node.isIndirect()) {
seen.insert(i.node.getObjGen());
}
seen.add(i.node);
}
while (!failed) {
if (node.isIndirect()) {
auto og = node.getObjGen();
if (seen.count(og)) {
QTC::TC("qpdf", "NNTree deepen: loop");
warn(
impl.qpdf,
node,
"loop detected while traversing name/number tree");
failed = true;
break;
}
seen.insert(og);
if (!seen.add(node)) {
QTC::TC("qpdf", "NNTree deepen: loop");
warn(
impl.qpdf,
node,
"loop detected while traversing name/number tree");
failed = true;
break;
}
if (!node.isDictionary()) {
QTC::TC("qpdf", "NNTree node is not a dictionary");
warn(
@ -928,17 +923,15 @@ NNTreeImpl::findInternal(QPDFObjectHandle key, bool return_prev_if_not_found)
}
}
std::set<QPDFObjGen> seen;
QPDFObjGen::set seen;
auto node = this->oh;
iterator result(*this);
while (true) {
auto og = node.getObjGen();
if (seen.count(og)) {
if (!seen.add(node)) {
QTC::TC("qpdf", "NNTree loop in find");
error(qpdf, node, "loop detected in find");
}
seen.insert(og);
auto kids = node.getKey("/Kids");
int nkids = kids.isArray() ? kids.getArrayNItems() : 0;