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The minimum required match length plays an important role in the
current algorithm. This algorithm requires that the current match
has at least 8 mismatches over a region where we find a new match,
therefore imposing a minimum match length of at least 8 bytes.
This patch allows to increase this minium value to avoid using small
matches that only match a very small region. A larger value can
improve the patch size, depending on the data, but a too large value
will cause the algorithm to miss matches that were otherwise benefical.
Bug: 73107113
Test: Added unittests. Ran it with different minlen values.
Change-Id: Iac594fc1cd7ecd5cfdc676bdb6ebe7c626de6dcd
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Split the unittest logic between bsdiff() function and the PatchWriter.
This patch now tests individually the PatchWriter logic that writes to
disk and the bsdiff() logic to create patches in the same very simple
cases.
We also update the Android.bp file to only pass -DBSDIFF_TARGET_UNITTEST
when building for the target.
Bug: 34220646
Test: ran unittests.
Change-Id: I9350157ee4a0b5a617f44bb187bd7652f6d6f017
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We also remove the "using std::string" clause from the files that were
using it to simplify the integration with google's string type.
Bug: None
Test: Build and ran unittest.
Change-Id: I752040494f6a6bb8447d8ff6d7cc2cf2784085d6
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This prevents accidentally including a header file from another project
that happens to have the same name.
Test: `make checkbuild`; emerge-${BOARD} bsdiff
Bug: None
Change-Id: I8af132ed388738c30a8e3d7434de70b1e9d2f924
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The Makefile didn't build libbspatch and libbsdiff. This patch includes
those libraries in the Makefile and moves the header files exposed by
those to an include/bsdiff subdirectory following the Android
convention so calling program can include "bsdiff/bspatch.h" avoiding
any collision with other libraries.
The Android.mk is updated to export the new include path while keeping
the old style until calling programs are updated.
The new Makefile allows Chromium OS to build the new libraries.
Bug: None
Test: FEATURES=test emerge-link bsdiff; sudo emerge bsdiff
Test: mmma external/bsdiff
Change-Id: I2ea9251eb224e9418fe236e4c4c9c5621853f590
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The unitests were compiled in the Makefile but not on Android. This
patch builds the unittests for the host on Android.
Bug: 24478450
Test: mmma external/bsdiff && out/host/linux-x86/bin/bsdiff_unittest
Change-Id: Ib9f70e57273e585f31b46068d29b277aaae611eb
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To help refactoring the FILE* access behind an interface and better
integrate with unittest code, this patch moves the C sources to C++.
Minor changes to make this conform to C++ were included.
Bug: 24478450
Test: `make all test && ./unittests`; mm
Change-Id: I27d7fb0660efc18ea0cb84ff544c9dd9c4803050
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bsdiff and bspatch are in C and had no unittest. This patch keeps
those programs as C code, but adds the C++ gtest unittest framework
to allow testing them. Two simple unittests added to validate that the
unittests work.
BUG=None
TEST=make test; ./unittests
Change-Id: I8bca6b0c6bc5d5880464183d50a602c9886d20d0
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