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author | Treehugger Robot <treehugger-gerrit@google.com> | 2021-04-20 01:21:29 +0000 |
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committer | Gerrit Code Review <noreply-gerritcodereview@google.com> | 2021-04-20 01:21:29 +0000 |
commit | be81a990b3e1b1827602cf0fd23c5b55dce3a4de (patch) | |
tree | 6a5fca95ce93294ff06b53dbdfd4e3a81548cea3 | |
parent | 9a8f19b42f572fb4b8133b1ab4ab016218aebd8f (diff) | |
parent | 9e1d2fe1b6484bf6e693d104a7a30d0162d53e85 (diff) | |
download | bsdiff-be81a990b3e1b1827602cf0fd23c5b55dce3a4de.tar.gz |
Merge "Add comment explaining why we need custom logic to parse int"android-s-beta-2android-s-beta-1
-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; |