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Code Issues Releases Wiki Activity

Add private methods for reserving specific objects

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This commit is contained in:
Jay Berkenbilt 2022-05-15 13:10:10 -04:00
parent 7fa5d1773b
commit 9064542b5f
4 changed files with 26 additions and 2 deletions
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1
include/qpdf/QPDF.hh
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@ -1079,6 +1079,7 @@ class QPDF
std::shared_ptr<QPDFObject> resolve(int objid, int generation);
void resolveObjectsInStream(int obj_stream_number);
void stopOnError(std::string const& message);
QPDFObjectHandle reserveObjectIfNotExists(int objid, int gen);
// Calls finish() on the pipeline when done but does not delete it
bool pipeStreamData(

7
include/qpdf/QPDFObjectHandle.hh
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@ -1444,6 +1444,12 @@ class QPDFObjectHandle
return QPDFObjectHandle::newStream(
qpdf, objid, generation, stream_dict, offset, length);
}
// Reserve an object with a specific ID
static QPDFObjectHandle
makeReserved()
{
return QPDFObjectHandle::makeReserved();
}
};
friend class Factory;
@ -1561,6 +1567,7 @@ class QPDFObjectHandle
QPDFObjectHandle stream_dict,
qpdf_offset_t offset,
size_t length);
static QPDFObjectHandle makeReserved();
void typeWarning(char const* expected_type, std::string const& warning);
void objectWarning(std::string const& warning);

11
libqpdf/QPDF.cc
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@ -2155,6 +2155,17 @@ QPDF::makeIndirectObject(QPDFObjectHandle oh)
this, next.getObj(), next.getGen());
}
QPDFObjectHandle
QPDF::reserveObjectIfNotExists(int objid, int gen)
{
QPDFObjGen og(objid, gen);
if ((!this->m->obj_cache.count(og)) && (!this->m->xref_table.count(og))) {
resolve(objid, gen);
replaceObject(objid, gen, QPDFObjectHandle::Factory::makeReserved());
}
return getObjectByID(objid, gen);
}
QPDFObjectHandle
QPDF::getObjectByObjGen(QPDFObjGen const& og)
{

9
libqpdf/QPDFObjectHandle.cc
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@ -2775,14 +2775,19 @@ QPDFObjectHandle::newReserved(QPDF* qpdf)
{
// Reserve a spot for this object by assigning it an object
// number, but then return an unresolved handle to the object.
QPDFObjectHandle reserved =
qpdf->makeIndirectObject(QPDFObjectHandle(new QPDF_Reserved()));
QPDFObjectHandle reserved = qpdf->makeIndirectObject(makeReserved());
QPDFObjectHandle result =
newIndirect(qpdf, reserved.objid, reserved.generation);
result.reserved = true;
return result;
}
QPDFObjectHandle
QPDFObjectHandle::makeReserved()
{
return QPDFObjectHandle(new QPDF_Reserved());
}
void
QPDFObjectHandle::setObjectDescription(
QPDF* owning_qpdf, std::string const& object_description)