Snap for 7298338 from 27b55c2640bf9bcff7fb17d4651d6a36f1645760 to sc-releaseandroid-vts-12.0_r9android-vts-12.0_r8android-vts-12.0_r7android-vts-12.0_r6android-vts-12.0_r5android-vts-12.0_r4android-vts-12.0_r3android-vts-12.0_r2android-vts-12.0_r12android-vts-12.0_r11android-vts-12.0_r10android-vts-12.0_r1android-security-12.0.0_r59android-security-12.0.0_r58android-security-12.0.0_r57android-security-12.0.0_r56android-security-12.0.0_r55android-security-12.0.0_r54android-security-12.0.0_r53android-security-12.0.0_r52android-security-12.0.0_r51android-security-12.0.0_r50android-security-12.0.0_r49android-security-12.0.0_r48android-security-12.0.0_r47android-security-12.0.0_r46android-security-12.0.0_r45android-security-12.0.0_r44android-security-12.0.0_r43android-security-12.0.0_r42android-security-12.0.0_r41android-security-12.0.0_r40android-security-12.0.0_r39android-security-12.0.0_r38android-security-12.0.0_r37android-security-12.0.0_r36android-security-12.0.0_r35android-security-12.0.0_r34android-platform-12.0.0_r9android-platform-12.0.0_r8android-platform-12.0.0_r7android-platform-12.0.0_r6android-platform-12.0.0_r5android-platform-12.0.0_r4android-platform-12.0.0_r31android-platform-12.0.0_r30android-platform-12.0.0_r3android-platform-12.0.0_r29android-platform-12.0.0_r28android-platform-12.0.0_r27android-platform-12.0.0_r26android-platform-12.0.0_r25android-platform-12.0.0_r24android-platform-12.0.0_r23android-platform-12.0.0_r22android-platform-12.0.0_r21android-platform-12.0.0_r20android-platform-12.0.0_r2android-platform-12.0.0_r19android-platform-12.0.0_r18android-platform-12.0.0_r17android-platform-12.0.0_r16android-platform-12.0.0_r15android-platform-12.0.0_r14android-platform-12.0.0_r13android-platform-12.0.0_r12android-platform-12.0.0_r11android-platform-12.0.0_r10android-platform-12.0.0_r1android-cts-12.0_r9android-cts-12.0_r8android-cts-12.0_r7android-cts-12.0_r6android-cts-12.0_r5android-cts-12.0_r4android-cts-12.0_r3android-cts-12.0_r2android-cts-12.0_r12android-cts-12.0_r11android-cts-12.0_r10android-cts-12.0_r1android-12.0.0_r9android-12.0.0_r8android-12.0.0_r34android-12.0.0_r33android-12.0.0_r31android-12.0.0_r30android-12.0.0_r3android-12.0.0_r25android-12.0.0_r2android-12.0.0_r11android-12.0.0_r10android-12.0.0_r1android12-tests-releaseandroid12-security-releaseandroid12-s5-releaseandroid12-s4-releaseandroid12-s3-releaseandroid12-s2-releaseandroid12-s1-releaseandroid12-releaseandroid12-platform-release

Change-Id: Ia616c9fa6065760c5b15b69ff450c575deeaa15e

1 files changed, 5 insertions, 0 deletions

diff --git a/utils.cc b/utils.cc
index c3e613e..c82eb98 100644
--- a/utils.cc
+++ b/utils.cc
@@ -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;