Brian Warner 89e9076c41 mutable/retrieve.py: rewrite partial-read handling
This should tolerate offset/size combinations that read the last byte of
the file, something which was broken before. It quits early in the case
of zero-byte reads, to simplify the resulting "which segments do I need"
logic. Probably addresses ticket:2459.
2015-07-28 10:13:32 -07:00
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