Begin adding support for UWB files

I'm not entirely sure what this is for yet, it's layout/level
related.

src/lib.rs

@@ -137,6 +137,9 @@ pub mod stm;
 /// Reading patch lists
 pub mod patchlist;
 
+/// Reading UWB files
+pub mod uwb;
+
 mod bcn;
 
 mod error;

src/uwb.rs

@@ -0,0 +1,74 @@
+// SPDX-FileCopyrightText: 2025 Joshua Goins <josh@redstrate.com>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+use std::io::Cursor;
+
+use crate::ByteBuffer;
+use crate::ByteSpan;
+use binrw::BinRead;
+use binrw::BinWrite;
+use binrw::binrw;
+
+#[binrw]
+#[derive(Debug)]
+#[brw(little)]
+#[brw(magic = b"UWB1")]
+pub struct Uwb {
+    /// Including this header
+    pub file_size: u32,
+    /// Number of UWC's
+    #[br(temp)]
+    #[bw(calc = uwcs.len() as u32)]
+    uwc_count: u32,
+    #[br(count = uwc_count)]
+    pub uwcs: Vec<Uwc>,
+}
+
+#[binrw]
+#[derive(Debug)]
+#[brw(little)]
+#[brw(magic = b"UWC1")]
+pub struct Uwc {
+    /// Including this header
+    pub file_size: u32,
+    // TODO: figure out what this is
+    #[br(count = file_size - 8)]
+    pub unk1: Vec<u8>,
+}
+
+impl Uwb {
+    /// Reads an existing UWB file
+    pub fn from_existing(buffer: ByteSpan) -> Option<Self> {
+        let mut cursor = Cursor::new(buffer);
+        Uwb::read(&mut cursor).ok()
+    }
+
+    pub fn write_to_buffer(&self) -> Option<ByteBuffer> {
+        let mut buffer = ByteBuffer::new();
+
+        {
+            let mut cursor = Cursor::new(&mut buffer);
+            self.write_le(&mut cursor).ok()?;
+        }
+
+        Some(buffer)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::fs::read;
+    use std::path::PathBuf;
+
+    use super::*;
+
+    #[test]
+    fn test_invalid() {
+        let mut d = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+        d.push("resources/tests");
+        d.push("random");
+
+        // Feeding it invalid data should not panic
+        Uwb::from_existing(&read(d).unwrap());
+    }
+}