LMX bug: Adium ticket #13628

[Evan Schoenberg, M.D.]

So LMX is supposed to be able to take data in chunks, from the end of the file.  It turns out that this doesn't work if a chunk breaks up an entity, though.

A chat transcript, submitted by lhirlimann to me via email by request, exhibits this behavior on my machine, when read by -[DCMessageContextDisplayPlugin contextForChat:], since that method reads in 4*getpagesize() byte chunks and that number of bytes from the end is the middle of an entity.

Specifically, the resulting chunk #1 starts with 'apos'.  The resulting chunk #2 ends with '&'.

The result is an assertion failure:
 *** Assertion failure in -[LMXParser parseEntityReference:], /Volumes/Huffman/Projects/lmx-sholt/LMXParser.m:605
"entity name was empty! currentIndex is 5193 (&) out of 21579 bytes"

It's not clear to me how to proceed with a fix.  Do you (yes, you!) have any ideas?

I don't want to post the user's chat log to a public mailing list; if you're an existing developer and would like it in order to easily see the behavior, email me off-list.

This took way too long to hunt down, though it's a fairly obvious problem in retrospect.

Cheers,
Evan


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