From c7d81087878b767ef84b5d8170585652bc6efa5c Mon Sep 17 00:00:00 2001
From: oupson <oupson1er@gmail.com>
Date: Thu, 6 Oct 2022 11:12:30 +0200
Subject: [PATCH] Fix get_real_size

---
 rustcryptfs-linux/src/encrypted_filesystem.rs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/rustcryptfs-linux/src/encrypted_filesystem.rs b/rustcryptfs-linux/src/encrypted_filesystem.rs
index c86ce9e..d0cca84 100644
--- a/rustcryptfs-linux/src/encrypted_filesystem.rs
+++ b/rustcryptfs-linux/src/encrypted_filesystem.rs
@@ -60,9 +60,14 @@ impl EncryptedFs {
     }
 
     fn get_real_size(size: u64) -> u64 {
-        let x = ((size as f64 - 48.0) / 4128.0).floor() as u64;
+        if size == 0 {
+            0
+        } else {
+            let x = (size - 50) / 4128;
 
-        x * 4096 + size - 48 - x * 4096
+            let y = (size - 50) - x * 4128;
+            x * 4096 + y
+        }
     }
 
     fn get_file_type(file_type: StdFileType) -> FileType {