- 20 Jul, 2009 1 commit
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Doug Zongker authored
Adds a zip mode ("-z") to imgdiff to construct efficient patches for zip files (including jars and apks). We identify the regions within the zip file containing deflated data, and when a corresponding file can be found in the source zip, a patch is generated for the uncompressed version of the data. The GZIP chunk type is replaced with a DEFLATE chunk type that handles a raw deflated data stream. This new DEFLATE chunk can be used for both gzipped pieces (as found within boot and recovery images) and zip files (apks, etc.) The gzip header and footer are handled by NORMAL chunks on either side of the main DEFLATE chunks. (Typically these tiny NORMAL chunks will get merged with adjacent chunks, so the number of output chunks is unaffected.) Add a test script that tests the generate-apply cycle on all the zips and images within a pair of full OTA packages.
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- 29 May, 2009 1 commit
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Doug Zongker authored
Images (like boot and recovery) consist of large sections of gzipped data interspersed with other data. To do effective binary patching of these files, we need to apply patches to the gzipped parts in 'uncompressed space', that is, we decompress, apply a patch, then recompress to obtain the desired output. This change defines a new format with these patches, which is basically a description of how the source and target files are to be divided up into chunks and a bsdiff patch for each chunk. We add a new host executable, "imgdiff", for generating these patches from source and target images, and add support in applypatch for recognizing this format and applying it on the device.
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- 03 Mar, 2009 2 commits
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The Android Open Source Project authored
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The Android Open Source Project authored
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- 21 Oct, 2008 1 commit
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The Android Open Source Project authored
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