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author | Treehugger Robot <treehugger-gerrit@google.com> | 2021-04-20 03:18:33 +0000 |
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committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2021-04-20 03:18:33 +0000 |
commit | 30ed9f91515a8de40199d3dee8642b586a635996 (patch) | |
tree | 6a5fca95ce93294ff06b53dbdfd4e3a81548cea3 | |
parent | a58c233befe05b2a4aef45982cc5ea765845d4c1 (diff) | |
parent | 94af5fff583831d75c92b83f95a6d25a1888c3d1 (diff) | |
download | bsdiff-30ed9f91515a8de40199d3dee8642b586a635996.tar.gz |
Merge "Add comment explaining why we need custom logic to parse int" am: be81a990b3 am: 94af5fff58
Original change: https://android-review.googlesource.com/c/platform/external/bsdiff/+/1680665
Change-Id: Id2a7fd04a0e001451ca2cc8a93e9703bb6de184b
-rw-r--r-- | utils.cc | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -7,6 +7,11 @@ namespace bsdiff { int64_t ParseInt64(const uint8_t* buf) { + // BSPatch uses a non-standard encoding of integers. + // Highest bit of that integer is used as a sign bit, 1 = negative + // and 0 = positive. + // Therefore, if the highest bit is set, flip it, then do 2's complement + // to get the integer in standard form int64_t result = buf[7] & 0x7F; for (int i = 6; i >= 0; i--) { result <<= 8; |