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Fix calculation of xref stream stream columns

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Fix problem: if the last object in the first part of a linearized file
had an offset that was below 65536 by less than the size of the hint
stream, the xref stream was invalid and the resulting file is not
usable.
This commit is contained in:
Jay Berkenbilt 2014-02-22 22:12:34 -05:00
parent 247d70efee
commit b0a96ce6aa
2 changed files with 8 additions and 1 deletions
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ChangeLog
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@ -1,3 +1,10 @@
2014-02-22 Jay Berkenbilt <ejb@ql.org>
* Bug fix: if the last object in the first part of a linearized
file had an offset that was below 65536 by less than the size of
the hint stream, the xref stream was invalid and the resulting file
is not usable. This is now fixed.
2014-01-14 Jay Berkenbilt <ejb@ql.org>
* 5.1.1: release

2
libqpdf/QPDFWriter.cc
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@ -2447,7 +2447,7 @@ QPDFWriter::writeXRefStream(int xref_id, int max_id, qpdf_offset_t max_offset,
qpdf_offset_t space_before_zero = xref_offset - 1;
// field 1 contains offsets and object stream identifiers
int f1_size = std::max(bytesNeeded(max_offset),
int f1_size = std::max(bytesNeeded(max_offset + hint_length),
bytesNeeded(max_id));
// field 2 contains object stream indices