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| author | Treehugger Robot <treehugger-gerrit@google.com> | 2021-04-20 04:45:43 +0000 |
|---|---|---|
| committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2021-04-20 04:45:43 +0000 |
| commit | eb2172d477147b19142f6ea515396297b78bbc74 (patch) | |
| tree | 6a5fca95ce93294ff06b53dbdfd4e3a81548cea3 | |
| parent | c766cc16e00bede852aa58283a676805f9fc9a3b (diff) | |
| parent | 27b55c2640bf9bcff7fb17d4651d6a36f1645760 (diff) | |
| download | bsdiff-eb2172d477147b19142f6ea515396297b78bbc74.tar.gz | |
Merge "Add comment explaining why we need custom logic to parse int" am: be81a990b3 am: 94af5fff58 am: 30ed9f9151 am: 27b55c2640
Original change: https://android-review.googlesource.com/c/platform/external/bsdiff/+/1680665
Change-Id: I95d94b17c7608d054105ba55c53b0484b971f4af
| -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; |