Add STM module

src/lib.rs

@@ -159,3 +159,6 @@ pub mod pap;
 
 /// Reading AVFX files
 pub mod avfx;
+
+/// Reading STM files
+pub mod stm;

src/stm.rs

@@ -0,0 +1,31 @@
+// SPDX-FileCopyrightText: 2024 Joshua Goins <josh@redstrate.com>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+use std::io::Cursor;
+
+use crate::ByteSpan;
+use binrw::binrw;
+use binrw::BinRead;
+
+#[binrw]
+#[derive(Debug)]
+#[brw(little)]
+struct StmHeader {
+    #[br(pad_before = 1)] // TODO: what is this byte?
+    entry_count: i32
+}
+
+#[derive(Debug)]
+pub struct Stm {
+
+}
+
+impl Stm {
+    /// Reads an existing ULD file
+    pub fn from_existing(buffer: ByteSpan) -> Option<Self> {
+        let mut cursor = Cursor::new(buffer);
+        let header = StmHeader::read(&mut cursor).ok()?;
+
+        Some(Stm{})
+    }
+}