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| From: | A.R. Burgers |
| Subject: | [Octave-bug-tracker] [bug #55427] save -v7 exits with "error compressing data element" |
| Date: | Thu, 1 Jul 2021 16:41:10 -0400 (EDT) |
| User-agent: | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36 Edg/91.0.864.41 |
Follow-up Comment #13, bug #55427 (project octave):
replacing this line
uLongf destLen = srcLen * 101 / 100 + 12;
with
uLongf destLen = double(srcLen) * 101 / 100 + 12;
also makes the standalone program work, with this result:
srcLen=209715200 destLen=211812364
after compression: destLen=181079622
the srcLen * 101 apparently overflows, as you already diagnosed.
Your solution looks fine, good find the compressBound.
The -5 error return is Z_BUF_ERROR
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