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Tune QPDF::readObject

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This commit is contained in:
m-holger 2023-07-08 16:20:01 +01:00
parent 5754ab8b39
commit ba3953f1bf
1 changed files with 14 additions and 24 deletions
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38
libqpdf/QPDF.cc
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@ -1291,32 +1291,27 @@ QPDF::readObject(std::string const& description, QPDFObjGen og)
{
setLastObjectDescription(description, og);
qpdf_offset_t offset = m->file->tell();
bool empty = false;
std::shared_ptr<StringDecrypter> decrypter_ph;
StringDecrypter* decrypter = nullptr;
if (m->encp->encrypted) {
decrypter_ph = std::make_unique<StringDecrypter>(this, og);
decrypter = decrypter_ph.get();
}
auto object = QPDFParser(m->file, m->last_object_description, m->tokenizer, decrypter, this)
StringDecrypter decrypter{this, og};
StringDecrypter* decrypter_ptr = m->encp->encrypted ? &decrypter : nullptr;
auto object = QPDFParser(m->file, m->last_object_description, m->tokenizer, decrypter_ptr, this)
.parse(empty, false);
if (empty) {
// Nothing in the PDF spec appears to allow empty objects, but they have been encountered in
// actual PDF files and Adobe Reader appears to ignore them.
warn(damagedPDF(m->file, m->file->getLastOffset(), "empty object treated as null"));
} else if (object.isDictionary()) {
// check for stream
qpdf_offset_t cur_offset = m->file->tell();
if (readToken(m->file).isWord("stream")) {
readStream(object, og, offset);
} else {
m->file->seek(cur_offset, SEEK_SET);
}
return object;
}
auto token = readToken(m->file);
if (object.isDictionary() && token.isWord("stream")) {
readStream(object, og, offset);
token = readToken(m->file);
}
if (!token.isWord("endobj")) {
QTC::TC("qpdf", "QPDF err expected endobj");
warn(damagedPDF("expected endobj"));
}
// Override last_offset so that it points to the beginning of the object we just read
m->file->setLastOffset(offset);
return object;
}
@ -1602,11 +1597,6 @@ QPDF::readObjectAtOffset(
QPDFObjectHandle oh = readObject(description, og);
if (!readToken(m->file).isWord("endobj")) {
QTC::TC("qpdf", "QPDF err expected endobj");
warn(damagedPDF("expected endobj"));
}
if (isUnresolved(og)) {
// Store the object in the cache here so it gets cached whether we first know the offset or
// whether we first know the object ID and generation (in which we case we would get here