1 files changed, 25 insertions, 0 deletions
diff --git a/netfs/fuse/fuseFiles.cpp b/netfs/fuse/fuseFiles.cpp
index 3ecb37f..a44f56e 100644
--- a/netfs/fuse/fuseFiles.cpp
+++ b/netfs/fuse/fuseFiles.cpp
@@ -210,6 +210,31 @@ namespace NetFS {
 		}
 	}
 
+	FuseApp::OpenFile::BlockSizes
+	FuseApp::OpenFile::blockSizes(size_t total, size_t max) noexcept
+	{
+		if (max >= total) { // Simple case, all in remainder block
+			return {total, 0, 0};
+		}
+		else if (total % max == 0) { // Simplish case, multiples of max
+			return {0, max, total / max};
+		}
+		else {
+			const auto blocks = (total / max);
+			const auto blockSize = (total / (blocks + 1)) + 1;
+			const auto batchTotal = blockSize * blocks;
+			const auto remainder = total - batchTotal;
+
+			return {remainder, blockSize, blocks};
+		}
+	}
+
+	size_t
+	FuseApp::OpenFile::BlockSizes::total() const noexcept
+	{
+		return size1 + (sizeN * N);
+	}
+
 	ssize_t
 	FuseApp::copy_file_range(const char *, struct fuse_file_info * fi_in, off_t offset_in, const char *,
 			struct fuse_file_info * fi_out, off_t offset_out, size_t size, int flags)