implemented FUSE lookup function

Cargo.lock

@@ -150,6 +150,10 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "fat-mount"
+version = "0.1.0"
+
 [[package]]
 name = "fuser"
 version = "0.15.1"

fat-bits/src/dir.rs

@@ -65,7 +65,6 @@ pub struct DirEntry {
 
     file_size: u32,
 
-    checksum: u8,
     long_name: Option<CompactString>,
 }
 
@@ -91,7 +90,7 @@ impl Display for DirEntry {
 }
 
 impl DirEntry {
-    fn load_name(bytes: [u8; 11], attr: &Attr) -> [u8; 13] {
+    fn load_name(bytes: [u8; 13], attr: &Attr) -> [u8; 13] {
         let mut name = [0; 13];
 
         let mut iter = name.iter_mut();
@@ -195,7 +194,6 @@ impl DirEntry {
             write_date,
             file_size,
             long_name: None,
-            checksum: Self::checksum(&bytes[..11]),
         })
     }
 
@@ -336,10 +334,10 @@ impl DirEntry {
         self.file_size
     }
 
-    pub fn checksum(name: &[u8]) -> u8 {
+    pub fn checksum(&self) -> u8 {
         let mut checksum: u8 = 0;
 
-        for &x in name {
+        for &x in self.name() {
             checksum = checksum.rotate_right(1).wrapping_add(x);
         }
 
@@ -579,7 +577,7 @@ impl<R: Read> DirIter<R> {
 
         if let Some(iter) = self
             .long_filename_buf
-            .get_buf(dir_entry.checksum)
+            .get_buf(dir_entry.checksum())
             .map_err(|e| {
                 anyhow::anyhow!(
                     "failed to get long filename for {}: {}",

fat-mount/Cargo.toml

@@ -1,10 +0,0 @@
-[package]
-name = "fat-mount"
-version = "0.1.0"
-edition = "2024"
-
-[dependencies]
-anyhow = "1.0.98"
-env_logger = "0.11.8"
-fat-fuse = { version = "0.1.0", path = "../fat-fuse" }
-fuser = "0.15.1"

fat-mount/src/main.rs

@@ -1,29 +0,0 @@
-use std::cell::RefCell;
-use std::fs::File;
-use std::rc::Rc;
-
-use fat_fuse::FatFuse;
-use fuser::MountOption;
-
-fn main() -> anyhow::Result<()> {
-    env_logger::init();
-
-    let mut args = std::env::args();
-
-    let path = args.next().ok_or(anyhow::anyhow!("missing fs path"))?;
-    let mountpoint = args.next().ok_or(anyhow::anyhow!("missing mount point"))?;
-
-    let file = File::open(path)?;
-
-    let fat_fuse = FatFuse::new(Rc::new(RefCell::new(file)))?;
-
-    let options = vec![
-        MountOption::RO,
-        MountOption::FSName("fat-fuse".to_owned()),
-        MountOption::AutoUnmount,
-    ];
-
-    fuser::mount2(fat_fuse, mountpoint, &options).unwrap();
-
-    Ok(())
-}