octoleo/qpdf
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Use QPDFObjGen::set in QPDF::replaceForeignIndirectObjects

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This commit is contained in:
m-holger 2023-05-19 11:12:49 +01:00
parent aeb66311c2
commit 5473c0956c
2 changed files with 24 additions and 32 deletions
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2
include/qpdf/QPDF.hh
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@ -1017,7 +1017,7 @@ class QPDF
public:
std::map<QPDFObjGen, QPDFObjectHandle> object_map;
std::vector<QPDFObjectHandle> to_copy;
std::set<QPDFObjGen> visiting;
QPDFObjGen::set visiting;
};
class EncryptionParameters

54
libqpdf/QPDF.cc
View File

@ -2176,7 +2176,8 @@ QPDF::copyForeignObject(QPDFObjectHandle foreign)
void
QPDF::reserveObjects(QPDFObjectHandle foreign, ObjCopier& obj_copier, bool top)
{
if (foreign.isReserved()) {
auto foreign_tc = foreign.getTypeCode();
if (foreign_tc == ::ot_reserved) {
throw std::logic_error(
"QPDF: attempting to copy a foreign reserved object");
}
@ -2193,70 +2194,62 @@ QPDF::reserveObjects(QPDFObjectHandle foreign, ObjCopier& obj_copier, bool top)
if (foreign.isIndirect()) {
QPDFObjGen foreign_og(foreign.getObjGen());
if (obj_copier.visiting.find(foreign_og) != obj_copier.visiting.end()) {
QTC::TC("qpdf", "QPDF loop reserving objects");
if (obj_copier.object_map.count(foreign_og) > 0) {
QTC::TC("qpdf", "QPDF already reserved object");
if (obj_copier.visiting.count(foreign_og)) {
QTC::TC("qpdf", "QPDF loop reserving objects");
}
return;
}
if (obj_copier.object_map.find(foreign_og) !=
obj_copier.object_map.end()) {
QTC::TC("qpdf", "QPDF already reserved object");
if (!obj_copier.visiting.add(foreign_og)) {
return;
}
QTC::TC("qpdf", "QPDF copy indirect");
obj_copier.visiting.insert(foreign_og);
auto mapping = obj_copier.object_map.find(foreign_og);
if (mapping == obj_copier.object_map.end()) {
if (obj_copier.object_map.count(foreign_og) == 0) {
obj_copier.to_copy.push_back(foreign);
QPDFObjectHandle reservation;
if (foreign.isStream()) {
reservation = newStream();
} else {
reservation = QPDFObjectHandle::newReserved(this);
}
obj_copier.object_map[foreign_og] = reservation;
obj_copier.object_map[foreign_og] = foreign.isStream()
? newStream()
: QPDFObjectHandle::newReserved(this);
}
}
if (foreign.isArray()) {
if (foreign_tc == ::ot_array) {
QTC::TC("qpdf", "QPDF reserve array");
int n = foreign.getArrayNItems();
for (int i = 0; i < n; ++i) {
reserveObjects(foreign.getArrayItem(i), obj_copier, false);
}
} else if (foreign.isDictionary()) {
} else if (foreign_tc == ::ot_dictionary) {
QTC::TC("qpdf", "QPDF reserve dictionary");
for (auto const& key: foreign.getKeys()) {
reserveObjects(foreign.getKey(key), obj_copier, false);
}
} else if (foreign.isStream()) {
} else if (foreign_tc == ::ot_stream) {
QTC::TC("qpdf", "QPDF reserve stream");
reserveObjects(foreign.getDict(), obj_copier, false);
}
if (foreign.isIndirect()) {
QPDFObjGen foreign_og(foreign.getObjGen());
obj_copier.visiting.erase(foreign_og);
}
obj_copier.visiting.erase(foreign);
}
QPDFObjectHandle
QPDF::replaceForeignIndirectObjects(
QPDFObjectHandle foreign, ObjCopier& obj_copier, bool top)
{
auto foreign_tc = foreign.getTypeCode();
QPDFObjectHandle result;
if ((!top) && foreign.isIndirect()) {
QTC::TC("qpdf", "QPDF replace indirect");
QPDFObjGen foreign_og(foreign.getObjGen());
auto mapping = obj_copier.object_map.find(foreign_og);
auto mapping = obj_copier.object_map.find(foreign.getObjGen());
if (mapping == obj_copier.object_map.end()) {
// This case would occur if this is a reference to a Page
// or Pages object that we didn't traverse into.
QTC::TC("qpdf", "QPDF replace foreign indirect with null");
result = QPDFObjectHandle::newNull();
} else {
result = obj_copier.object_map[foreign_og];
result = mapping->second;
}
} else if (foreign.isArray()) {
} else if (foreign_tc == ::ot_array) {
QTC::TC("qpdf", "QPDF replace array");
result = QPDFObjectHandle::newArray();
int n = foreign.getArrayNItems();
@ -2266,7 +2259,7 @@ QPDF::replaceForeignIndirectObjects(
replaceForeignIndirectObjects(
foreign.getArrayItem(i), obj_copier, false));
}
} else if (foreign.isDictionary()) {
} else if (foreign_tc == ::ot_dictionary) {
QTC::TC("qpdf", "QPDF replace dictionary");
result = QPDFObjectHandle::newDictionary();
std::set<std::string> keys = foreign.getKeys();
@ -2276,10 +2269,9 @@ QPDF::replaceForeignIndirectObjects(
replaceForeignIndirectObjects(
foreign.getKey(iter), obj_copier, false));
}
} else if (foreign.isStream()) {
} else if (foreign_tc == ::ot_stream) {
QTC::TC("qpdf", "QPDF replace stream");
QPDFObjGen foreign_og(foreign.getObjGen());
result = obj_copier.object_map[foreign_og];
result = obj_copier.object_map[foreign.getObjGen()];
result.assertStream();
QPDFObjectHandle dict = result.getDict();
QPDFObjectHandle old_dict = foreign.getDict();