fixed bug in CasContainerStrategy::ReadIndexFile (#595)

this was introduced in a recent optimization and would cause CAS items to not be found after a shutdown/restart cycle

1 files changed, 3 insertions, 1 deletions

diff --git a/src/zenstore/compactcas.cpp b/src/zenstore/compactcas.cpp
index 42302c4a9..96ab65a5f 100644
--- a/src/zenstore/compactcas.cpp
+++ b/src/zenstore/compactcas.cpp
@@ -989,13 +989,14 @@ CasContainerStrategy::ReadIndexFile(const std::filesystem::path& IndexPath, uint
 			Entries.resize(128 * 1024 / sizeof(CasDiskIndexEntry));
 
 			uint64_t RemainingEntries = Header.EntryCount;
+			uint64_t ReadOffset		  = sizeof(CasDiskIndexHeader);
 
 			do
 			{
 				const uint64_t NumToRead = Min(RemainingEntries, Entries.size());
 				Entries.resize(NumToRead);
 
-				ObjectIndexFile.Read(Entries.data(), Entries.size() * sizeof(CasDiskIndexEntry), sizeof(CasDiskIndexHeader));
+				ObjectIndexFile.Read(Entries.data(), Entries.size() * sizeof(CasDiskIndexEntry), ReadOffset);
 
 				std::string InvalidEntryReason;
 				for (const CasDiskIndexEntry& Entry : Entries)
@@ -1011,6 +1012,7 @@ CasContainerStrategy::ReadIndexFile(const std::filesystem::path& IndexPath, uint
 				}
 
 				RemainingEntries -= NumToRead;
+				ReadOffset += NumToRead * sizeof(CasDiskIndexEntry);
 			} while (RemainingEntries);
 
 			OutVersion = CasDiskIndexHeader::CurrentVersion;