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In ObjTable change maximum allowable object id to std::vector<T>::max_size()

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Given that the PDF spec requires the xref table to contain entries for all
object ids <= the maximum id present in a PDF document, max_size is a
qpdf implementation limitation for legitimate object ids.
This commit is contained in:
m-holger 2024-08-31 12:55:53 +01:00
parent c1377176f8
commit 68ac2179bd
1 changed files with 7 additions and 4 deletions
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11
libqpdf/qpdf/ObjTable.hh
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@ -113,6 +113,7 @@ class ObjTable: public std::vector<T>
} }
} }
inline void inline void
forEach(std::function<void(int, const T&)> fn) forEach(std::function<void(int, const T&)> fn)
{ {
@ -131,24 +132,26 @@ class ObjTable: public std::vector<T>
inline T& inline T&
element(size_t idx) element(size_t idx)
{ {
static const size_t max_size = std::vector<T>::max_size();
if (idx < std::vector<T>::size()) { if (idx < std::vector<T>::size()) {
return std::vector<T>::operator[](idx); return std::vector<T>::operator[](idx);
} else if (idx < static_cast<size_t>(std::numeric_limits<int>::max())) { } else if (idx < max_size) {
return sparse_elements[idx]; return sparse_elements[idx];
} }
throw std::runtime_error("Invalid object id accessing ObjTable."); throw std::runtime_error("Impossibly large object id encountered accessing ObjTable");
return element(0); // doesn't return return element(0); // doesn't return
} }
inline T const& inline T const&
element(size_t idx) const element(size_t idx) const
{ {
static const size_t max_size = std::vector<T>::max_size();
if (idx < std::vector<T>::size()) { if (idx < std::vector<T>::size()) {
return std::vector<T>::operator[](idx); return std::vector<T>::operator[](idx);
} else if (idx < static_cast<size_t>(std::numeric_limits<int>::max())) { } else if (idx < max_size) {
return sparse_elements.at(idx); return sparse_elements.at(idx);
} }
throw std::runtime_error("Invalid object id accessing ObjTable."); throw std::runtime_error("Impossibly large object id encountered accessing ObjTable");
return element(0); // doesn't return return element(0); // doesn't return
} }
}; };