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88 lines
1.8 KiB
Rust
88 lines
1.8 KiB
Rust
// SPDX-FileCopyrightText: 2025 Joshua Goins <josh@redstrate.com>
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// SPDX-License-Identifier: GPL-3.0-or-later
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use std::io::Cursor;
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use crate::ByteBuffer;
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use crate::ByteSpan;
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use binrw::BinRead;
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use binrw::BinWrite;
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use binrw::binrw;
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#[binrw]
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#[derive(Debug)]
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#[brw(little)]
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#[brw(magic = b"LCB1")]
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pub struct Lcb {
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/// Including this header
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pub file_size: u32,
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/// Number of Lcc's
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#[br(temp)]
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#[bw(calc = lccs.len() as u32)]
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lcc_count: u32,
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#[br(count = lcc_count)]
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pub lccs: Vec<Lcc>,
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}
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#[binrw]
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#[derive(Debug)]
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#[brw(little)]
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#[brw(magic = b"LCC1")]
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pub struct Lcc {
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#[br(temp)]
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#[bw(calc = entries.len() as u32 + 1)]
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pub num_entries: u32,
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#[brw(pad_before = 4)] // empty?
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pub unk1: u32,
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pub unk2: u32,
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// TODO: figure out what this is
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// TODO: why is it -1?
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#[br(count = num_entries - 1)]
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pub entries: Vec<LccEntry>,
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}
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#[binrw]
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#[derive(Debug)]
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#[brw(little)]
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pub struct LccEntry {
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// TODO: figure out what this is
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#[br(count = 32)]
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pub unk1: Vec<u8>,
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}
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impl Lcb {
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/// Reads an existing UWB file
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pub fn from_existing(buffer: ByteSpan) -> Option<Self> {
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let mut cursor = Cursor::new(buffer);
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Lcb::read(&mut cursor).ok()
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}
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pub fn write_to_buffer(&self) -> Option<ByteBuffer> {
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let mut buffer = ByteBuffer::new();
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{
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let mut cursor = Cursor::new(&mut buffer);
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self.write_le(&mut cursor).ok()?;
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}
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Some(buffer)
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}
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}
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#[cfg(test)]
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mod tests {
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use std::fs::read;
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use std::path::PathBuf;
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use super::*;
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#[test]
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fn test_invalid() {
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let mut d = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
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d.push("resources/tests");
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d.push("random");
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// Feeding it invalid data should not panic
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Lcb::from_existing(&read(d).unwrap());
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}
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}
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