special treatment large oplog attachments v2 (#5)

- Bugfix: Install Ctrl+C handler earlier when doing `zen oplog-export` and `zen oplog-export` to properly cancel jobs
- Improvement: Add ability to block a set of CAS entries from GC in project store
- Improvement: Large attachments and loose files are now split into smaller chunks and stored in blocks during oplog export

1 files changed, 10 insertions, 2 deletions

diff --git a/src/zenutil/basicfile.cpp b/src/zenutil/basicfile.cpp
index ad98bf652..f553fe5a0 100644
--- a/src/zenutil/basicfile.cpp
+++ b/src/zenutil/basicfile.cpp
@@ -272,7 +272,7 @@ BasicFile::Write(CompositeBuffer Data, uint64_t FileOffset, std::error_code& Ec)
 	for (const SharedBuffer& Buffer : Data.GetSegments())
 	{
 		MemoryView BlockView = Buffer.GetView();
-		Write(BlockView, FileOffset, Ec);
+		Write(BlockView, FileOffset + WrittenBytes, Ec);
 
 		if (Ec)
 		{
@@ -490,6 +490,14 @@ BasicFile::SetFileSize(uint64_t FileSize)
 #endif
 }
 
+void
+BasicFile::Attach(void* Handle)
+{
+	ZEN_ASSERT(Handle != nullptr);
+	ZEN_ASSERT(m_FileHandle == nullptr);
+	m_FileHandle = Handle;
+}
+
 void*
 BasicFile::Detach()
 {
@@ -716,7 +724,7 @@ BasicFileWriter::~BasicFileWriter()
 }
 
 void
-BasicFileWriter::Write(void* Data, uint64_t Size, uint64_t FileOffset)
+BasicFileWriter::Write(const void* Data, uint64_t Size, uint64_t FileOffset)
 {
 	if (m_Buffer == nullptr || (Size >= m_BufferSize))
 	{