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Use QPDFObjGen::set in QPDFAcroFormDocumentHelper::traverseField

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This commit is contained in:
m-holger 2023-01-05 13:10:27 +00:00
parent e7e24fe070
commit c12a6d06fc
2 changed files with 6 additions and 7 deletions
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2
include/qpdf/QPDFAcroFormDocumentHelper.hh
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@ -254,7 +254,7 @@ class QPDFAcroFormDocumentHelper: public QPDFDocumentHelper
QPDFObjectHandle field,
QPDFObjectHandle parent,
int depth,
std::set<QPDFObjGen>& visited);
QPDFObjGen::set& visited);
QPDFObjectHandle getOrCreateAcroForm();
void adjustInheritedFields(
QPDFObjectHandle obj,

11
libqpdf/QPDFAcroFormDocumentHelper.cc
View File

@ -57,7 +57,7 @@ QPDFAcroFormDocumentHelper::addFormField(QPDFFormFieldObjectHelper ff)
"/Fields", QPDFObjectHandle::newArray());
}
fields.appendItem(ff.getObjectHandle());
std::set<QPDFObjGen> visited;
QPDFObjGen::set visited;
traverseField(
ff.getObjectHandle(), QPDFObjectHandle::newNull(), 0, visited);
}
@ -167,7 +167,7 @@ QPDFAcroFormDocumentHelper::setFormFieldName(
QPDFFormFieldObjectHelper ff, std::string const& name)
{
ff.setFieldAttribute("/T", name);
std::set<QPDFObjGen> visited;
QPDFObjGen::set visited;
auto ff_oh = ff.getObjectHandle();
traverseField(ff_oh, ff_oh.getKey("/Parent"), 0, visited);
}
@ -273,7 +273,7 @@ QPDFAcroFormDocumentHelper::analyze()
// Traverse /AcroForm to find annotations and map them
// bidirectionally to fields.
std::set<QPDFObjGen> visited;
QPDFObjGen::set visited;
int nfields = fields.getArrayNItems();
QPDFObjectHandle null(QPDFObjectHandle::newNull());
for (int i = 0; i < nfields; ++i) {
@ -319,7 +319,7 @@ QPDFAcroFormDocumentHelper::traverseField(
QPDFObjectHandle field,
QPDFObjectHandle parent,
int depth,
std::set<QPDFObjGen>& visited)
QPDFObjGen::set& visited)
{
if (depth > 100) {
// Arbitrarily cut off recursion at a fixed depth to avoid
@ -341,12 +341,11 @@ QPDFAcroFormDocumentHelper::traverseField(
return;
}
QPDFObjGen og(field.getObjGen());
if (visited.count(og) != 0) {
if (!visited.add(og)) {
QTC::TC("qpdf", "QPDFAcroFormDocumentHelper loop");
field.warnIfPossible("loop detected while traversing /AcroForm");
return;
}
visited.insert(og);
// A dictionary encountered while traversing the /AcroForm field
// may be a form field, an annotation, or the merger of the two. A