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Write offsets as unsigned in linearization hint tables (fixes #1023)

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This commit is contained in:
Jay Berkenbilt 2023-10-14 18:03:34 -04:00
parent 9fc02e2f91
commit 71566a2761
3 changed files with 13 additions and 4 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2023-10-14 Jay Berkenbilt <ejb@ql.org>
* Tweak linearization code to better handle files between 2 GB and
4 GB in size. Fixes #1023.
* Fix serious bug: qpdf could discard a the character after an
escaped octal string. For content, this would only happen with QDF
or when normalizing content, but it could have happened in a

6
include/qpdf/QPDF.hh
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@ -1437,6 +1437,12 @@ class QPDF
{
return QIntC::to_int(i);
}
template <typename T>
static unsigned long long
toULL(T const& i)
{
return QIntC::to_ulonglong(i);
}
class Members
{

8
libqpdf/QPDF_linearization.cc
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@ -1670,11 +1670,11 @@ QPDF::writeHPageOffset(BitWriter& w)
HPageOffset& t = m->page_offset_hints;
w.writeBitsInt(t.min_nobjects, 32); // 1
w.writeBitsInt(toI(t.first_page_offset), 32); // 2
w.writeBits(toULL(t.first_page_offset), 32); // 2
w.writeBitsInt(t.nbits_delta_nobjects, 16); // 3
w.writeBitsInt(t.min_page_length, 32); // 4
w.writeBitsInt(t.nbits_delta_page_length, 16); // 5
w.writeBitsInt(t.min_content_offset, 32); // 6
w.writeBits(toULL(t.min_content_offset), 32); // 6
w.writeBitsInt(t.nbits_delta_content_offset, 16); // 7
w.writeBitsInt(t.min_content_length, 32); // 8
w.writeBitsInt(t.nbits_delta_content_length, 16); // 9
@ -1717,7 +1717,7 @@ QPDF::writeHSharedObject(BitWriter& w)
HSharedObject& t = m->shared_object_hints;
w.writeBitsInt(t.first_shared_obj, 32); // 1
w.writeBitsInt(toI(t.first_shared_offset), 32); // 2
w.writeBits(toULL(t.first_shared_offset), 32); // 2
w.writeBitsInt(t.nshared_first_page, 32); // 3
w.writeBitsInt(t.nshared_total, 32); // 4
w.writeBitsInt(t.nbits_nobjects, 16); // 5
@ -1749,7 +1749,7 @@ void
QPDF::writeHGeneric(BitWriter& w, HGeneric& t)
{
w.writeBitsInt(t.first_object, 32); // 1
w.writeBitsInt(toI(t.first_object_offset), 32); // 2
w.writeBits(toULL(t.first_object_offset), 32); // 2
w.writeBitsInt(t.nobjects, 32); // 3
w.writeBitsInt(t.group_length, 32); // 4
}