sven/libicsneo
1
0
Fork 0
mirror of https://github.com/intrepidcs/libicsneo.git synced 2026-08-05 01:18:36 +02:00
Code Issues Projects Releases Wiki Activity

Disk: Fix improper offset calculation

Browse Source 
This would cause an underflow previously
This commit is contained in:
Paul Hollinsky
2022-02-25 01:14:57 -05:00
parent 242c7259ac
commit 241502c2a2
2 changed files with 13 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
disk/diskreaddriver.cpp
+6 -1
View File
@@ -24,7 +24,12 @@ optional<uint64_t> ReadDriver::readLogicalDisk(Communication& com, device_eventh
while(blocksProcessed < blocks && timeout >= std::chrono::milliseconds::zero()) {
const uint64_t currentBlock = startBlock + blocksProcessed;
const uint64_t intoOffset = std::max<uint64_t>((blocksProcessed * idealBlockSize) - posWithinFirstBlock, 0);
uint64_t intoOffset = blocksProcessed * idealBlockSize;;
if(intoOffset < posWithinFirstBlock)
intoOffset = 0;
else
intoOffset -= posWithinFirstBlock;
const uint32_t posWithinCurrentBlock = (blocksProcessed ? 0 : posWithinFirstBlock);
uint32_t curAmt = idealBlockSize - posWithinCurrentBlock;
const auto amountLeft = amount - ret.value_or(0);