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fix deflate when last buffer is zero length

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acetone
2026-07-23 12:09:44 +03:00
parent db701c7928
commit fd19f724e6
1 changed files with 18 additions and 12 deletions
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libi2pd/Gzip.cpp
+18 -12
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@@ -146,23 +146,29 @@ namespace data
m_Deflator.avail_in = it.second;
m_Deflator.next_out = out + offset;
m_Deflator.avail_out = outLen - offset;
auto flush = (it == bufs.back ()) ? Z_FINISH : Z_NO_FLUSH;
err = deflate (&m_Deflator, flush);
if (err)
{
if (flush && err == Z_STREAM_END)
{
out[9] = 0xff; // OS is always unknown
return outLen - m_Deflator.avail_out;
}
break;
}
err = deflate (&m_Deflator, Z_NO_FLUSH);
if (err) break;
offset = outLen - m_Deflator.avail_out;
}
}
// else
if (!err)
{
// finish the stream
m_Deflator.next_in = nullptr;
m_Deflator.avail_in = 0;
m_Deflator.next_out = out + offset;
m_Deflator.avail_out = outLen - offset;
err = deflate (&m_Deflator, Z_FINISH);
if (err == Z_STREAM_END)
{
out[9] = 0xff; // OS is always unknown
return outLen - m_Deflator.avail_out;
}
}
if (err)
LogPrint (eLogError, "Gzip: Deflate error ", err);
else
LogPrint (eLogError, "Gzip: Deflate error, output buffer is too small");
return 0;
}