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* Convert deflate image chunks to raw if the raw data is smallerTianjie Xu2018-05-241-0/+0
The imgpatch will fail on empty deflates because the bspatch won't call the sink function if the target length is zero. Instead of compressing an empty string, it's cleaner to not generate such empty deflate chunks in the patch. Therefore, we can just convert the chunk type to raw if the target length is smaller than the patch data. Also adjust some unit tests and add the testdata gzipped_source & gzipped_target. These two files are ~1K each and are generated by gzipping two slightly different regular files. Bug: 79265132 Test: unit tests pass, imgpatch applys successfully on the given src/tgt Change-Id: I6bfff3251918137f6762a6f9e9551642371a1124