| 1f1cdb2b6baa562d9858fb2324a85382b9ea963e |
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20-Nov-2017 |
Tianjie Xu <xunchang@google.com> |
Add an argument parser in bsdiff
Add a parser of format, type and quality in the bsdiff main function.
This allow the bsdiff binary to choose between the BSDFF40|BSDF2 patch
format and compress the patch with desired algorithms.
Bug: 34220646
Test: unittest pass; generate brotli compressed patches with bsdiff
binary
Change-Id: Ia4f7941e4eca7e6047e2749315127d1cf4a988ee
/external/bsdiff/patch_writer.h
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| b4cba64184d6cc745749b325430d838ff0b42bd7 |
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15-Nov-2017 |
Tianjie Xu <xunchang@google.com> |
Implement a new bsdiff format
Add a new BSDF2 format that allows compression of ctrl/diff/extra streams
with different algorithms. The compression algorithm supported for now is
bz2 and brotli. This new format is similar to the legacy "BSDIFF40" format
except for the magic headers.
File format:
0 8 magic header
8 8 X
16 8 Y
24 8 new_file_size
32 X compressed control block
32+X Y compressed diff block
32+X+Y ??? compressed extra block
The magic header for BSDF2 format:
0 5 BSDF2
5 1 compressed type for control stream
6 1 compressed type for diff stream
7 1 compressed type for extra stream
Bug: 34220646
Test: unittest pass
Change-Id: I6eb0867e88476dbc4a4b7be609783f8c8a0a41cd
/external/bsdiff/patch_writer.h
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| 1c26e2ed9bf8ae5cd9f4c5437fcfe0b131b4a7da |
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27-Oct-2017 |
Tianjie Xu <xunchang@google.com> |
Add the brotli compressor for bsdiff
Add a new compressor interface; and the brotli compressor which is
similar to the existing bz2 one.
Also add a new CompressorType argument to PatchWriter's init function;
this allows us to choose the right compressor based on the input option
in the future.
Bug: 34220646
Test: Run bsdiff/bspatch with brotli compressor/decompressor over a
list of files from angler's system image. Make succeeds.
Change-Id: Id9a3db2d7d051dcb751a1fc362f4c3b9226e878b
/external/bsdiff/patch_writer.h
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| 4dadd8b4439358585be374226357b35aece52f17 |
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26-Oct-2017 |
Alex Deymo <deymo@google.com> |
Pass the size of the new file to the PatchWriterInterface::Init()
Most patch formats include the size of the new file in the header.
To help streaming the patch to disk while generating it, this CL
passes the size of the new file to the patch writer on initialization.
To do this, we also move the Init() call to the patch writer to the
DiffEncoder, which makes more sense since the Close() call is also made
from the DiffEnconder.
Bug: None
Test: Updated tests to check for this value.
Change-Id: Idfaedbd492d68ab6e6cb2c1cb3883947f068c3aa
/external/bsdiff/patch_writer.h
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| 68c0e7f20623158c007735100b95f2ccbc468ad7 |
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02-Oct-2017 |
Alex Deymo <deymo@google.com> |
Reduce PatchWriterInterface functionality.
The recently introduced PatchWriterInterface had both the patch file
format logic and the diff/extra streams selection from the control
entries. While this simplifies the bsdiff main algorithm and makes
invalid usages of the BsdiffPatchWriter evident, writing alternative
PatchWriterInterface classes required to replicate the diff/extra
stream selection logic.
This patch splits out the diff/extra stream generation and all the
checks around those to a new helper class DiffEncoder. The public
interface PatchWriterInterface now has two methods to accept the diff
and extra stream data, and does not compute them.
Bug: 34220646
Test: Added unittests. Ran bsdiff on some pairs of files obtaining the same result as before.
Change-Id: I5f303c06f1e10910eb00dcfda38c6811977a91cf
/external/bsdiff/patch_writer.h
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| 538a75d13b8061deb99f33c5766542d286563aad |
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27-Sep-2017 |
Alex Deymo <deymo@google.com> |
Make BsdiffPatchWriter into an Interface.
Currently, all bsdiff() functions take a filename for the patch, which
is called with a temporary file in all cases. To help expose an
interface that allows to write bsdiff patches in different formats (for
example, changing the compressor and header format) we expose the
PatchWriterInterface class in the public interface so callers can use
a different one or define their own to help experimenting with bsdiff
enconding improvements.
Bug: 34220646
Test: make bsdiff and update_engine; ran bsdiff_unittest
Change-Id: Ie450b2790137665bc033cb36d037171090b18a4b
/external/bsdiff/patch_writer.h
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| a28e01937d4828d19d9ee332f244fe6c4fe0841b |
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08-Sep-2017 |
Alex Deymo <deymo@google.com> |
Refactor bsdiff patch writing code to another file.
bsdiff.cc had code to handle both the sub-streams compression and the
patch format. This CL moves the patch file format logic to a new class
in a separated file, and the bzip2 compression to another class. This
allows to replace the core bsdiff logic separatedly from the patch
format.
There are no changes to the functionality of bsdiff and the generated
patches. The code does a bit more of memcpy() since it doesn't write
the control stream to disk as it goes.
Bug: 34220646
Test: Ran bsdiff and compared results with previous version.
Change-Id: Ibdc1482e98cbd370cbed677c326008e19a217ef8
/external/bsdiff/patch_writer.h
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