Overhauled U8 archive handling

Cargo.lock

@@ -405,6 +405,22 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
+[[package]]
+name = "errno"
+version = "0.3.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
+dependencies = [
+ "libc",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "fastrand"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
@@ -884,9 +900,9 @@ dependencies = [
 
 [[package]]
 name = "js-sys"
-version = "0.3.88"
+version = "0.3.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7e709f3e3d22866f9c25b3aff01af289b18422cc8b4262fb19103ee80fe513d"
+checksum = "14dc6f6450b3f6d4ed5b16327f38fed626d375a886159ca555bd7822c0c3a5a6"
 dependencies = [
  "once_cell",
  "wasm-bindgen",
@@ -919,6 +935,12 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"
+
 [[package]]
 name = "litemap"
 version = "0.8.1"
@@ -1280,9 +1302,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.8.9"
+version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a96887878f22d7bad8a3b6dc5b7440e0ada9a245242924394987b21cf2210a4c"
+checksum = "dc897dd8d9e8bd1ed8cdad82b5966c3e0ecae09fb1907d58efaa013543185d0a"
 
 [[package]]
 name = "reqwest"
@@ -1366,10 +1388,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
 
 [[package]]
-name = "rustls"
+name = "rustix"
-version = "0.23.36"
+version = "1.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c665f33d38cea657d9614f766881e4d510e0eda4239891eea56b4cadcf01801b"
+checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
+dependencies = [
+ "bitflags",
+ "errno",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "rustls"
+version = "0.23.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "758025cb5fccfd3bc2fd74708fd4682be41d99e5dff73c377c0646c6012c73a4"
 dependencies = [
  "aws-lc-rs",
  "once_cell",
@@ -1462,6 +1497,7 @@ dependencies = [
  "reqwest",
  "rsa",
  "sha1",
+ "tempfile",
  "thiserror 2.0.18",
  "walkdir",
 ]
@@ -1702,6 +1738,19 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "tempfile"
+version = "3.26.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82a72c767771b47409d2345987fda8628641887d5466101319899796367354a0"
+dependencies = [
+ "fastrand",
+ "getrandom 0.4.1",
+ "once_cell",
+ "rustix",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.69"
@@ -1973,9 +2022,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.111"
+version = "0.2.113"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec1adf1535672f5b7824f817792b1afd731d7e843d2d04ec8f27e8cb51edd8ac"
+checksum = "60722a937f594b7fde9adb894d7c092fc1bb6612897c46368d18e7a20208eff2"
 dependencies = [
  "cfg-if",
  "once_cell",
@@ -1986,9 +2035,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.61"
+version = "0.4.63"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe88540d1c934c4ec8e6db0afa536876c5441289d7f9f9123d4f065ac1250a6b"
+checksum = "8a89f4650b770e4521aa6573724e2aed4704372151bd0de9d16a3bbabb87441a"
 dependencies = [
  "cfg-if",
  "futures-util",
@@ -2000,9 +2049,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.111"
+version = "0.2.113"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19e638317c08b21663aed4d2b9a2091450548954695ff4efa75bff5fa546b3b1"
+checksum = "0fac8c6395094b6b91c4af293f4c79371c163f9a6f56184d2c9a85f5a95f3950"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -2010,9 +2059,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.111"
+version = "0.2.113"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c64760850114d03d5f65457e96fc988f11f01d38fbaa51b254e4ab5809102af"
+checksum = "ab3fabce6159dc20728033842636887e4877688ae94382766e00b180abac9d60"
 dependencies = [
  "bumpalo",
  "proc-macro2",
@@ -2023,9 +2072,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.111"
+version = "0.2.113"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60eecd4fe26177cfa3339eb00b4a36445889ba3ad37080c2429879718e20ca41"
+checksum = "de0e091bdb824da87dc01d967388880d017a0a9bc4f3bdc0d86ee9f9336e3bb5"
 dependencies = [
  "unicode-ident",
 ]
@@ -2066,9 +2115,9 @@ dependencies = [
 
 [[package]]
 name = "web-sys"
-version = "0.3.88"
+version = "0.3.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d6bb20ed2d9572df8584f6dc81d68a41a625cadc6f15999d649a70ce7e3597a"
+checksum = "705eceb4ce901230f8625bd1d665128056ccbe4b7408faa625eec1ba80f59a97"
 dependencies = [
  "js-sys",
  "wasm-bindgen",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rustwii"
-authors = ["NinjaCheetah <ninjacheetah@ncxprogramming.com>"]
+authors = ["NinjaCheetah <campbell@ninjacheetah.dev>"]
 license = "MIT"
 description = "A Rust library and CLI for handling files and formats used by the Wii"
 version = "0.1.0"
@@ -29,7 +29,7 @@ cbc = "0"
 aes = "0"
 rsa = { version = "0", features = ["sha2"] }
 hex = "0"
-sha1 = { version = "0", features = ["oid"]}
+sha1 = { version = "0", features = ["oid"] }
 glob = "0"
 regex = "1"
 clap = { version = "4", features = ["derive"] }
@@ -38,3 +38,4 @@ thiserror = "2"
 reqwest = { version = "0", features = ["blocking"] }
 rand = "0"
 walkdir = "2"
+tempfile = "3"

src/archive/u8.rs

@@ -3,9 +3,8 @@
 //
 // Implements the structures and methods required for parsing U8 archives.
 
-use std::cell::RefCell;
+use std::cmp::max;
 use std::io::{Cursor, Read, Seek, SeekFrom, Write};
-use std::rc::{Rc, Weak};
 use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
 use thiserror::Error;
 
@@ -26,83 +25,18 @@ pub enum U8Error {
 #[derive(Clone, Debug)]
 pub struct U8Directory {
     pub name: String,
-    pub parent: Option<Weak<RefCell<U8Directory>>>,
+    pub dirs: Vec<U8Directory>,
-    pub dirs: Vec<Rc<RefCell<U8Directory>>>,
+    pub files: Vec<U8File>,
-    pub files: Vec<Rc<RefCell<U8File>>>,
 }
 
 #[derive(Clone, Debug)]
 pub struct U8File {
     pub name: String,
     pub data: Vec<u8>,
-    pub parent: Option<Weak<RefCell<U8Directory>>>,
-}
-
-impl U8Directory {
-    pub fn new(name: String) -> Rc<RefCell<Self>> {
-        Rc::new(RefCell::new(Self {
-            name,
-            parent: None,
-            dirs: Vec::new(),
-            files: Vec::new(),
-        }))
-    }
-
-    pub fn add_dir(parent: &Rc<RefCell<Self>>, child: Rc<RefCell<Self>>) {
-        child.borrow_mut().parent = Some(Rc::downgrade(parent));
-        parent.borrow_mut().dirs.push(child);
-    }
-
-    pub fn add_file(parent: &Rc<RefCell<Self>>, file: Rc<RefCell<U8File>>) {
-        file.borrow_mut().parent = Some(Rc::downgrade(parent));
-        parent.borrow_mut().files.push(file);
-    }
-
-    pub fn get_parent(&self) -> Option<Rc<RefCell<U8Directory>>> {
-        self.parent.as_ref()?.upgrade()
-    }
-
-    pub fn get_child_dir(parent: &Rc<RefCell<U8Directory>>, name: &str) -> Option<Rc<RefCell<U8Directory>>> {
-        parent.borrow().dirs.iter()
-            .find(|dir| dir.borrow().name == name)
-            .map(Rc::clone)
-    }
-    
-    fn count_recursive(dir: &Rc<RefCell<U8Directory>>, count: &mut usize) {
-        *count += dir.borrow().files.len();
-        for dir in dir.borrow().dirs.iter() {
-            *count += 1;
-            Self::count_recursive(dir, count);
-        }
-    }
-    
-    pub fn count(&self) -> usize {
-        let mut count: usize = 1;
-        count += self.files.len();
-        for dir in &self.dirs {
-            count += 1;
-            Self::count_recursive(dir, &mut count);
-        }
-        count
-    }
-}
-
-impl U8File {
-    pub fn new(name: String, data: Vec<u8>) -> Rc<RefCell<Self>> {
-        Rc::new(RefCell::new(Self {
-            name,
-            data,
-            parent: None,
-        }))
-    }
-
-    pub fn get_parent(&self) -> Option<Rc<RefCell<U8Directory>>> {
-        self.parent.as_ref()?.upgrade()
-    }
 }
 
 #[derive(Clone, Debug)]
-pub struct U8Node {
+struct U8Node {
     pub node_type: u8,
     pub name_offset: u32, // This is really type u24, so the most significant byte will be ignored.
     pub data_offset: u32,
@@ -110,13 +44,15 @@ pub struct U8Node {
 }
 
 #[derive(Clone, Debug)]
-pub struct U8Archive {
+struct U8Reader {
-    pub node_tree: Rc<RefCell<U8Directory>>,
+    buf: Cursor<Box<[u8]>>,
+    u8_nodes: Vec<U8Node>,
+    index: usize,
+    base_name_offset: u64
 }
 
-impl U8Archive {
+impl U8Reader {
-    /// Creates a new U8 instance from the binary data of a U8 file.
+    fn new(data: Box<[u8]>) -> Result<Self, U8Error> {
-    pub fn from_bytes(data: &[u8]) -> Result<Self, U8Error> {
         let mut buf = Cursor::new(data);
         let mut magic = [0u8; 4];
         buf.read_exact(&mut magic)?;
@@ -135,7 +71,7 @@ impl U8Archive {
                 }
                 println!("ignoring IMET header at 0x40");
             }
-            // Check for an IMET header that comes after a built tag.
+            // Check for an IMET header that comes after a build tag.
             else {
                 buf.seek(SeekFrom::Start(0x80))?;
                 buf.read_exact(&mut magic)?;
@@ -150,6 +86,7 @@ impl U8Archive {
                 }
             }
         }
+
         // We're skipping the following values:
         // root_node_offset (u32): constant value, always 0x20
         // header_size (u32): we don't need this because we already know how long the string table is
@@ -168,6 +105,7 @@ impl U8Archive {
             data_offset: root_node_data_offset,
             size: root_node_size,
         };
+
         // Create a vec of nodes, push the root node, and then iterate over the remaining number
         // of nodes in the file and push them to the vec.
         let mut u8_nodes: Vec<U8Node> = Vec::new();
@@ -179,103 +117,131 @@ impl U8Archive {
             let size = buf.read_u32::<BigEndian>()?;
             u8_nodes.push(U8Node { node_type, name_offset, data_offset, size })
         }
-        // Iterate over the loaded nodes and load the file names and data associated with them.
+        // Save the base name offset for later.
         let base_name_offset = buf.position();
-        let mut file_names = Vec::<String>::new();
+
-        let mut file_data = Vec::<Vec<u8>>::new();
+        Ok(Self {
-        for node in &u8_nodes {
+            buf,
-            buf.seek(SeekFrom::Start(base_name_offset + node.name_offset as u64))?;
+            u8_nodes,
-            let mut name_bin = Vec::<u8>::new();
+            index: 0,
-            // Read the file name one byte at a time until we find a null byte.
+            base_name_offset
-            loop {
+        })
-                let byte = buf.read_u8()?;
+    }
-                if byte == b'\0' {
+
-                    break;
+    fn file_name(&mut self, name_offset: u64) -> Result<String, U8Error> {
-                }
+        self.buf.seek(SeekFrom::Start(self.base_name_offset + name_offset))?;
-                name_bin.push(byte);
+        let mut name_bin = Vec::<u8>::new();
-            }
+        loop {
-            file_names.push(String::from_utf8(name_bin).map_err(|_| U8Error::InvalidFileName(base_name_offset + node.name_offset as u64))?.to_owned());
+            let byte = self.buf.read_u8()?;
-            // If this is a file node, read the data for the file.
+            if byte == b'\0' {
-            if node.node_type == 0 {
+                break;
-                buf.seek(SeekFrom::Start(node.data_offset as u64))?;
-                let mut data = vec![0u8; node.size as usize];
-                buf.read_exact(&mut data)?;
-                file_data.push(data);
-            } else {
-                file_data.push(Vec::new());
             }
+            name_bin.push(byte);
         }
-        // Now that we have all the data loaded out of the file, assemble the tree of U8Items that
+        Ok(String::from_utf8(name_bin)
-        // provides an actual map of the archive's data.
+            .map_err(|_| U8Error::InvalidFileName(self.base_name_offset + name_offset))?.to_owned()
-        let node_tree = U8Directory::new(String::new());
+        )
-        let mut focused_node = Rc::clone(&node_tree);
+    }
-        // This is the order of directory nodes we've traversed down.
+
-        let mut parent_dirs: Vec<u32> = Vec::from([0]);
+    fn file_data(&mut self, data_offset: u64, size: usize) -> Result<Vec<u8>, U8Error> {
-        for i in 0..u8_nodes.len() {
+        self.buf.seek(SeekFrom::Start(data_offset))?;
-            match u8_nodes[i].node_type {
+        let mut data = vec![0u8; size];
+        self.buf.read_exact(&mut data)?;
+        Ok(data)
+    }
+
+    fn read_dir_recursive(&mut self) -> Result<U8Directory, U8Error> {
+        let mut current_dir = U8Directory::new(self.file_name(self.u8_nodes[self.index].name_offset as u64)?);
+
+        let current_dir_end = self.u8_nodes[self.index].size as usize;
+        self.index += 1;
+        while self.index < current_dir_end {
+            match self.u8_nodes[self.index].node_type {
                 1 => {
-                    // Code for a directory node.
+                    // Directory node, recursive over the child dir and then add it to the
-                    if u8_nodes[i].name_offset != 0 {
+                    // current one.
-                        // If we're already at the correct level, push a new empty dir item to the
+                    let child_dir = self.read_dir_recursive()?;
-                        // item we're currently working on.
+                    current_dir.add_dir(child_dir);
-                        if u8_nodes[i].data_offset == *parent_dirs.last().unwrap() {
-                            parent_dirs.push(i as u32);
-                            U8Directory::add_dir(&focused_node, U8Directory::new(file_names[i].clone()));
-                            focused_node = U8Directory::get_child_dir(&focused_node, &file_names[i]).unwrap();
-                        }
-                        // Otherwise, go back up the path until we're at the correct level.
-                        else {
-                            while u8_nodes[i].data_offset != *parent_dirs.last().unwrap() {
-                                parent_dirs.pop();
-                                let parent = focused_node.as_ref().borrow().get_parent().unwrap();
-                                focused_node = parent;
-                            }
-                            parent_dirs.push(i as u32);
-                            // Rebuild current working directory, and make sure all directories in the
-                            // path exist.
-                            U8Directory::add_dir(&focused_node, U8Directory::new(file_names[i].clone()));
-                            focused_node = U8Directory::get_child_dir(&focused_node, &file_names[i]).unwrap()
-                        }
-                    }
                 },
                 0 => {
-                    // Code for a file node.
+                    // File node, add
-                    U8Directory::add_file(&focused_node, U8File::new(file_names[i].clone(), file_data[i].clone()));
+                    current_dir.add_file(
+                        U8File::new(
+                            self.file_name(self.u8_nodes[self.index].name_offset as u64)?,
+                            self.file_data(self.u8_nodes[self.index].data_offset as u64, self.u8_nodes[self.index].size as usize)?
+                        )
+                    );
+                    self.index += 1;
                 },
-                x => return Err(U8Error::InvalidNodeType(x, i))
+                x => return Err(U8Error::InvalidNodeType(x, self.index))
             }
         }
-        Ok(U8Archive {
+
-            node_tree,
+        Ok(current_dir)
-        })
+    }
+}
+
+impl U8Directory {
+    pub fn new(name: String) -> Self {
+        Self {
+            name,
+            dirs: vec![],
+            files: vec![]
+        }
     }
 
-    pub fn from_tree(node_tree: &Rc<RefCell<U8Directory>>) -> Result<Self, U8Error> {
+    pub fn dirs(&self) -> &Vec<U8Directory> {
-        Ok(U8Archive {
+        &self.dirs
-            node_tree: node_tree.clone(),
-        })
     }
 
-    fn pack_dir_recursive(file_names: &mut Vec<String>, file_data: &mut Vec<Vec<u8>>, u8_nodes: &mut Vec<U8Node>, current_node: &Rc<RefCell<U8Directory>>) {
+    pub fn set_dirs(&mut self, dirs: Vec<U8Directory>) {
+        self.dirs = dirs
+    }
+
+    pub fn files(&self) -> &Vec<U8File> {
+        &self.files
+    }
+
+    pub fn set_files(&mut self, files: Vec<U8File>) {
+        self.files = files
+    }
+
+    pub fn add_dir(&mut self, child: Self) -> &mut U8Directory {
+        self.dirs.push(child);
+        self.dirs.last_mut().unwrap()
+    }
+
+    pub fn add_file(&mut self, file: U8File) {
+        self.files.push(file);
+    }
+
+    /// Creates a new U8 instance from the binary data of a U8 file.
+    pub fn from_bytes(data: Box<[u8]>) -> Result<Self, U8Error> {
+        let mut u8_reader = U8Reader::new(data)?;
+        u8_reader.read_dir_recursive()
+    }
+
+    fn pack_dir_recursive(&self, file_names: &mut Vec<String>, file_data: &mut Vec<Vec<u8>>, u8_nodes: &mut Vec<U8Node>) {
         // For files, read their data into the file data list, add their name into the file name
         // list, then calculate the offset for their file name and create a new U8Node() for them.
         // 0 values for name/data offsets are temporary and are set later.
         let parent_node = u8_nodes.len() - 1;
-        for file in &current_node.borrow().files {
+        for file in &self.files {
-            file_names.push(file.borrow().name.clone());
+            file_names.push(file.name.clone());
-            file_data.push(file.borrow().data.clone());
+            file_data.push(file.data.clone());
             u8_nodes.push(U8Node { node_type: 0, name_offset: 0, data_offset: 0, size: file_data[u8_nodes.len()].len() as u32});
         }
+
         // For directories, add their name to the file name list, add empty data to the file data
         // list, find the total number of files and directories inside the directory to calculate
         // the final node included in it, then recursively call this function again on that
         // directory to process it.
-        for dir in &current_node.borrow().dirs {
+        for dir in &self.dirs {
-            file_names.push(dir.borrow().name.clone());
+            file_names.push(dir.name.clone());
             file_data.push(Vec::new());
-            let max_node = u8_nodes.len() + current_node.borrow().count() + 1;
+            let max_node = u8_nodes.len() + dir.count();
             u8_nodes.push(U8Node { node_type: 1, name_offset: 0, data_offset: parent_node as u32, size: max_node as u32});
-            U8Archive::pack_dir_recursive(file_names, file_data, u8_nodes, dir)
+            dir.pack_dir_recursive(file_names, file_data, u8_nodes);
         }
     }
 
@@ -285,9 +251,9 @@ impl U8Archive {
         let mut file_names: Vec<String> = vec![String::new()];
         let mut file_data: Vec<Vec<u8>> = vec![Vec::new()];
         let mut u8_nodes: Vec<U8Node> = Vec::new();
-        u8_nodes.push(U8Node { node_type: 1, name_offset: 0, data_offset: 0, size: self.node_tree.borrow().count() as u32 });
+        u8_nodes.push(U8Node { node_type: 1, name_offset: 0, data_offset: 0, size: self.count() as u32 });
-        let root_node = Rc::clone(&self.node_tree);
+        self.pack_dir_recursive(&mut file_names, &mut file_data, &mut u8_nodes);
-        U8Archive::pack_dir_recursive(&mut file_names, &mut file_data, &mut u8_nodes, &root_node);
+
         // Header size starts at 0 because the header size starts with the nodes and does not
         // include the actual file header.
         let mut header_size: u32 = 0;
@@ -315,6 +281,7 @@ impl U8Archive {
             u8_nodes[i].name_offset = current_name_offset;
             current_name_offset += file_names[i].len() as u32 + 1
         }
+
         // Begin writing file data.
         let mut buf: Vec<u8> = Vec::new();
         buf.write_all(b"\x55\xAA\x38\x2D")?;
@@ -344,4 +311,26 @@ impl U8Archive {
         }
         Ok(buf)
     }
+    
+    fn count_recursive(&self) -> usize {
+        let mut count = self.files.len() + self.dirs.len();
+
+        for dir in self.dirs.iter() {
+            count += dir.count_recursive();
+        }
+        count
+    }
+    
+    pub fn count(&self) -> usize {
+        1 + self.count_recursive()
+    }
+}
+
+impl U8File {
+    pub fn new(name: String, data: Vec<u8>) -> Self {
+        Self {
+            name,
+            data
+        }
+    }
 }

src/bin/playground/main.rs

@@ -3,47 +3,49 @@
 use std::fs;
 use rustwii::title::{wad, cert};
 use rustwii::title;
+use rustwii::archive::u8;
 // use rustii::title::content;
 
 fn main() {
-    let data = fs::read("sm.wad").unwrap();
+    // let data = fs::read("sm.wad").unwrap();
-    let title = title::Title::from_bytes(&data).unwrap();
+    // let title = title::Title::from_bytes(&data).unwrap();
-    println!("Title ID from WAD via Title object: {}", hex::encode(title.tmd.title_id()));
+    // println!("Title ID from WAD via Title object: {}", hex::encode(title.tmd.title_id()));
-    
+    //
-    let wad = wad::WAD::from_bytes(&data).unwrap();
+    // let wad = wad::WAD::from_bytes(&data).unwrap();
-    println!("size of tmd: {:?}", wad.tmd().len());
+    // println!("size of tmd: {:?}", wad.tmd().len());
-    println!("num content records: {:?}", title.tmd.content_records().len());
+    // println!("num content records: {:?}", title.tmd.content_records().len());
-    println!("first record data: {:?}", title.tmd.content_records().first().unwrap());
+    // println!("first record data: {:?}", title.tmd.content_records().first().unwrap());
-    println!("TMD is fakesigned: {:?}",title.tmd.is_fakesigned());
+    // println!("TMD is fakesigned: {:?}",title.tmd.is_fakesigned());
-    
+    //
-    println!("title version from ticket is: {:?}", title.ticket.title_version());
+    // println!("title version from ticket is: {:?}", title.ticket.title_version());
-    println!("title key (enc): {:?}", title.ticket.title_key());
+    // println!("title key (enc): {:?}", title.ticket.title_key());
-    println!("title key (dec): {:?}", title.ticket.title_key_dec());
+    // println!("title key (dec): {:?}", title.ticket.title_key_dec());
-    println!("ticket is fakesigned: {:?}", title.ticket.is_fakesigned());
+    // println!("ticket is fakesigned: {:?}", title.ticket.is_fakesigned());
-    
+    //
-    println!("title is fakesigned: {:?}", title.is_fakesigned());
+    // println!("title is fakesigned: {:?}", title.is_fakesigned());
-    
+    //
-    let cert_chain = &title.cert_chain;
+    // let cert_chain = &title.cert_chain;
-    println!("cert chain OK");
+    // println!("cert chain OK");
-    let result = cert::verify_ca_cert(&cert_chain.ca_cert()).unwrap();
+    // let result = cert::verify_ca_cert(&cert_chain.ca_cert()).unwrap();
-    println!("CA cert {} verified successfully: {}", cert_chain.ca_cert().child_cert_identity(), result);
+    // println!("CA cert {} verified successfully: {}", cert_chain.ca_cert().child_cert_identity(), result);
-    
+    //
-    let result = cert::verify_child_cert(&cert_chain.ca_cert(), &cert_chain.tmd_cert()).unwrap();
+    // let result = cert::verify_child_cert(&cert_chain.ca_cert(), &cert_chain.tmd_cert()).unwrap();
-    println!("TMD cert {} verified successfully: {}", cert_chain.tmd_cert().child_cert_identity(), result);
+    // println!("TMD cert {} verified successfully: {}", cert_chain.tmd_cert().child_cert_identity(), result);
-    let result = cert::verify_tmd(&cert_chain.tmd_cert(), &title.tmd).unwrap();
+    // let result = cert::verify_tmd(&cert_chain.tmd_cert(), &title.tmd).unwrap();
-    println!("TMD verified successfully: {}", result);
+    // println!("TMD verified successfully: {}", result);
-    
+    //
-    let result = cert::verify_child_cert(&cert_chain.ca_cert(), &cert_chain.ticket_cert()).unwrap();
+    // let result = cert::verify_child_cert(&cert_chain.ca_cert(), &cert_chain.ticket_cert()).unwrap();
-    println!("Ticket cert {} verified successfully: {}", cert_chain.ticket_cert().child_cert_identity(), result);
+    // println!("Ticket cert {} verified successfully: {}", cert_chain.ticket_cert().child_cert_identity(), result);
-    let result = cert::verify_ticket(&cert_chain.ticket_cert(), &title.ticket).unwrap();
+    // let result = cert::verify_ticket(&cert_chain.ticket_cert(), &title.ticket).unwrap();
-    println!("Ticket verified successfully: {}", result);
+    // println!("Ticket verified successfully: {}", result);
-    
+    //
-    let result = title.verify().unwrap();
+    // let result = title.verify().unwrap();
-    println!("full title verified successfully: {}", result);
+    // println!("full title verified successfully: {}", result);
     
     
 
-    // let mut u8_archive = u8::U8Archive::from_bytes(&fs::read("00000001.app").unwrap()).unwrap();
+    let u8_archive = u8::U8Directory::from_bytes(fs::read("testu8.arc").unwrap().into_boxed_slice()).unwrap();
+    println!("{:#?}", u8_archive);
     // println!("files and dirs counted: {}", u8_archive.node_tree.borrow().count());
     // fs::write("outfile.arc", u8_archive.to_bytes().unwrap()).unwrap();
     // println!("re-written");

src/bin/rustwii/archive/mod.rs

@@ -4,3 +4,4 @@
 pub mod ash;
 pub mod lz77;
 pub mod u8;
+pub mod theme;

src/bin/rustwii/archive/theme.rs

@@ -0,0 +1,28 @@
+// archive/theme.rs from ruswtii (c) 2025 NinjaCheetah & Contributors
+// https://github.com/NinjaCheetah/rustwii
+//
+// Code for the theme building commands in the rustii CLI.
+
+use anyhow::{bail, Context, Result};
+use clap::Subcommand;
+use tempfile::tempdir;
+
+#[derive(Subcommand)]
+#[command(arg_required_else_help = true)]
+pub enum Commands {
+    /// Apply an MYM theme to the Wii Menu
+    ApplyMym {
+        /// The path to the source MYM file to apply
+        mym_path: String,
+        /// The path to the base Wii Menu asset archive (000000xx.app)
+        base_path: String,
+        /// The file to output the finished theme to (<filename>.csm)
+        output: String,
+    }
+}
+
+pub fn theme_apply_mym(mym_path: &str, base_path: &str, output: &str) -> Result<()> {
+    todo!();
+
+    Ok(())
+}

src/bin/rustwii/archive/u8.rs

@@ -4,9 +4,7 @@
 // Code for the U8 packing/unpacking commands in the rustii CLI.
 
 use std::{str, fs};
-use std::cell::RefCell;
 use std::path::{Path, PathBuf};
-use std::rc::Rc;
 use anyhow::{bail, Context, Result};
 use clap::Subcommand;
 use glob::glob;
@@ -31,7 +29,7 @@ pub enum Commands {
     }
 }
 
-fn pack_dir_recursive(dir: &Rc<RefCell<u8::U8Directory>>, in_path: PathBuf) -> Result<()> {
+fn pack_dir_recursive(dir: &mut u8::U8Directory, in_path: PathBuf) -> Result<()> {
     let mut files = Vec::new();
     let mut dirs = Vec::new();
     for entry in glob(&format!("{}/*", in_path.display()))?.flatten() {
@@ -43,13 +41,12 @@ fn pack_dir_recursive(dir: &Rc<RefCell<u8::U8Directory>>, in_path: PathBuf) -> R
     }
     for file in files {
         let node = u8::U8File::new(file.file_name().unwrap().to_str().unwrap().to_owned(), fs::read(file)?);
-        u8::U8Directory::add_file(dir, node);
+        dir.add_file(node);
     }
     for child_dir in dirs {
         let node = u8::U8Directory::new(child_dir.file_name().unwrap().to_str().unwrap().to_owned());
-        u8::U8Directory::add_dir(dir, node);
+        let dir = dir.add_dir(node);
-        let dir = u8::U8Directory::get_child_dir(dir, child_dir.file_name().unwrap().to_str().unwrap()).unwrap();
+        pack_dir_recursive(dir, child_dir)?;
-        pack_dir_recursive(&dir, child_dir)?;
     }
     Ok(())
 }
@@ -60,22 +57,21 @@ pub fn pack_u8_archive(input: &str, output: &str) -> Result<()> {
         bail!("Source directory \"{}\" could not be found.", in_path.display());
     }
     let out_path = PathBuf::from(output);
-    let node_tree = u8::U8Directory::new(String::new());
+    let mut root_dir = u8::U8Directory::new(String::new());
-    pack_dir_recursive(&node_tree, in_path.to_path_buf()).with_context(|| "A U8 archive could not be packed.")?;
+    pack_dir_recursive(&mut root_dir, in_path.to_path_buf()).with_context(|| "A U8 archive could not be packed.")?;
-    let u8_archive = u8::U8Archive::from_tree(&node_tree).with_context(|| "An unknown error occurred while creating a U8 archive from the data.")?;
+    fs::write(&out_path, &root_dir.to_bytes()?).with_context(|| format!("Could not open output file \"{}\" for writing.", out_path.display()))?;
-    fs::write(&out_path, &u8_archive.to_bytes()?).with_context(|| format!("Could not open output file \"{}\" for writing.", out_path.display()))?;
     println!("Successfully packed directory \"{}\" into U8 archive \"{}\"!", in_path.display(), out_path.display());
     Ok(())
 }
 
-fn unpack_dir_recursive(dir: &Rc<RefCell<u8::U8Directory>>, out_path: PathBuf) -> Result<()> {
+fn unpack_dir_recursive(dir: &u8::U8Directory, out_path: PathBuf) -> Result<()> {
-    let out_path = out_path.join(&dir.borrow().name);
+    let out_path = out_path.join(&dir.name);
-    for file in &dir.borrow().files {
+    for file in &dir.files {
-        fs::write(out_path.join(&file.borrow().name), &file.borrow().data).with_context(|| format!("Failed to write output file \"{}\".", &file.borrow().name))?;
+        fs::write(out_path.join(&file.name), &file.data).with_context(|| format!("Failed to write output file \"{}\".", &file.name))?;
     }
-    for dir in &dir.borrow().dirs {
+    for dir in &dir.dirs {
-        if !out_path.join(&dir.borrow().name).exists() {
+        if !out_path.join(&dir.name).exists() {
-            fs::create_dir(out_path.join(&dir.borrow().name)).with_context(|| format!("The output directory \"{}\" could not be created.", out_path.display()))?;
+            fs::create_dir(out_path.join(&dir.name)).with_context(|| format!("The output directory \"{}\" could not be created.", out_path.display()))?;
         }
         unpack_dir_recursive(dir, out_path.clone())?;
     }
@@ -97,8 +93,8 @@ pub fn unpack_u8_archive(input: &str, output: &str) -> Result<()> {
     }
     // Extract the files and directories in the root, and then recurse over each directory to
     // extract the files and directories they contain.
-    let u8_archive = u8::U8Archive::from_bytes(&fs::read(in_path).with_context(|| format!("Input file \"{}\" could not be read.", in_path.display()))?)?;
+    let root_dir = u8::U8Directory::from_bytes(fs::read(in_path).with_context(|| format!("Input file \"{}\" could not be read.", in_path.display()))?.into_boxed_slice())?;
-    unpack_dir_recursive(&u8_archive.node_tree, out_path.clone())?;
+    unpack_dir_recursive(&root_dir, out_path.clone())?;
     println!("Successfully unpacked U8 archive to directory \"{}\"!", out_path.display());
     Ok(())
 }

src/bin/rustwii/info.rs

@@ -4,9 +4,7 @@
 // Code for the info command in the rustii CLI.
 
 use std::{str, fs};
-use std::cell::RefCell;
 use std::path::Path;
-use std::rc::Rc;
 use anyhow::{bail, Context, Result};
 use rustwii::archive::u8;
 use rustwii::{title, title::cert, title::tmd, title::ticket, title::wad, title::versions};
@@ -243,32 +241,32 @@ fn print_wad_info(wad: wad::WAD) -> Result<()> {
     Ok(())
 }
 
-fn print_full_tree(dir: &Rc<RefCell<u8::U8Directory>>, indent: usize) {
+fn print_full_tree(dir: &u8::U8Directory, indent: usize) {
     let prefix = "  ".repeat(indent);
-    let dir_name = if !dir.borrow().name.is_empty() {
+    let dir_name = if !dir.name.is_empty() {
-        &dir.borrow().name
+        &dir.name
     } else {
         &String::from("root")
     };
     println!("{}D {}", prefix, dir_name);
 
     // Print subdirectories
-    for subdir in &dir.borrow().dirs {
+    for subdir in &dir.dirs {
         print_full_tree(subdir, indent + 1);
     }
 
     // Print files
-    for file in &dir.borrow().files {
+    for file in &dir.files {
-        let file_name = &file.borrow().name;
+        let file_name = &file.name;
         println!("{}  F {}", prefix, file_name);
     }
 }
 
-fn print_u8_info(u8_archive: u8::U8Archive) -> Result<()> {
+fn print_u8_info(root_dir: u8::U8Directory) -> Result<()> {
     println!("U8 Archive Info");
-    println!("  Node Count: {}", u8_archive.node_tree.borrow().count());
+    println!("  Node Count: {}", root_dir.count());
     println!("  Archive Data:");
-    print_full_tree(&u8_archive.node_tree, 2);
+    print_full_tree(&root_dir, 2);
     Ok(())
 }
 
@@ -291,7 +289,7 @@ pub fn info(input: &str) -> Result<()> {
             print_wad_info(wad)?;
         },
         Some(WiiFileType::U8) => {
-            let u8_archive = u8::U8Archive::from_bytes(&fs::read(in_path)?).with_context(|| "The provided U8 archive could not be parsed, and is likely invalid.")?;
+            let u8_archive = u8::U8Directory::from_bytes(fs::read(in_path)?.into_boxed_slice()).with_context(|| "The provided U8 archive could not be parsed, and is likely invalid.")?;
             print_u8_info(u8_archive)?;
         }
         None => {

src/bin/rustwii/main.rs

@@ -60,6 +60,11 @@ enum Commands {
         #[command(subcommand)]
         command: nand::setting::Commands
     },
+    /// Apply custom themes to the Wii Menu
+    Theme {
+        #[command(subcommand)]
+        command: archive::theme::Commands
+    },
     /// Edit a TMD file
     Tmd {
         #[command(subcommand)]
@@ -149,7 +154,14 @@ fn main() -> Result<()> {
                 }
             }
         },
-        Some(Commands::Tmd { command}) => {
+        Some(Commands::Theme { command }) => {
+            match command {
+                archive::theme::Commands::ApplyMym { mym_path, base_path, output } => {
+                    archive::theme::theme_apply_mym(mym_path, base_path, output)?
+                }
+            }
+        },
+        Some(Commands::Tmd { command }) => {
             match command {
                 title::tmd::Commands::Edit { input, output, edits} => {
                     title::tmd::tmd_edit(input, output, edits)?