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#[cfg(feature = "tar_ninres")]
use crate::IntoTar;
use crate::{read_u16, read_u32, ByteOrderMask, Error};
use std::convert::TryFrom;
#[cfg(any(feature = "tar_ninres", feature = "zstd"))]
use std::io::Cursor;
#[derive(Clone, Debug)]
pub struct Sarc {
pub header: SarcHeader,
pub sfat_header: SfatHeader,
pub sfat_nodes: Vec<SfatNode>,
}
#[derive(Clone, Debug)]
pub struct SarcHeader {
pub byte_order: ByteOrderMask,
pub file_size: u32,
pub data_offset: u32,
pub version_number: u16,
}
#[derive(Clone, Debug)]
pub struct SfatHeader {
pub node_count: u16,
}
#[derive(Clone, Debug)]
pub struct SfatNode {
pub hash: u32,
pub attributes: u32,
pub path_table_offset: Option<u32>,
pub path: Option<String>,
pub data_start_offset: u32,
pub data_end_offset: u32,
pub data: Vec<u8>,
#[cfg(feature = "zstd")]
pub data_decompressed: Option<Vec<u8>>,
}
impl SfatNode {
fn get_hash(data: &[u32], length: usize, key: u32) -> u32 {
let mut result = 0;
for i in 0..length {
result = data[i] + result * key;
}
return result;
}
}
impl Sarc {
pub fn new(buffer: &[u8]) -> Result<Sarc, Error> {
let byte_order = ByteOrderMask::try_from(read_u16(buffer, 0x6, ByteOrderMask::BigEndian))?;
let file_size = read_u32(buffer, 0x8, byte_order);
let data_offset = read_u32(buffer, 0xC, byte_order);
let version_number = read_u16(buffer, 0x10, byte_order);
let node_count = read_u16(buffer, 0x14 + 0x6, byte_order);
let mut sfat_nodes = vec![];
let file_name_table_offset = (0x14 + 0xC + node_count as u32 * 0x10) as usize;
for i in 0..node_count {
let offset = (0x14 + 0xC + i * 0x10) as usize;
let hash = read_u32(buffer, offset, byte_order);
let attributes = read_u32(buffer, offset + 0x4, byte_order);
let name_table_offset = if attributes & 0xffff0000 == 0x01000000 {
Some((attributes & 0x0000ffff) * 4)
} else {
None
};
let name = if let Some(name_table_offset) = name_table_offset {
let name = buffer[(file_name_table_offset + name_table_offset as usize + 8)..]
.iter()
.take_while(|&n| n != &0u8)
.cloned()
.collect::<_>();
Some(String::from_utf8(name)?)
} else {
None
};
let data_start_offset = read_u32(buffer, offset + 0x8, byte_order);
let data_end_offset = read_u32(buffer, offset + 0xC, byte_order);
let data = &buffer[(data_offset + data_start_offset) as usize
..(data_offset + data_end_offset) as usize];
sfat_nodes.push(SfatNode {
hash,
attributes,
path_table_offset: name_table_offset,
path: name,
data_start_offset,
data_end_offset,
data: data.to_vec(),
#[cfg(feature = "zstd")]
data_decompressed: if b"\x28\xB5\x2F\xFD" == &data[..4] {
use std::io::Read;
let mut decompressed = vec![];
let mut cursor = Cursor::new(data);
let mut decoder = ruzstd::StreamingDecoder::new(&mut cursor)
.map_err(|err| Error::ZstdError(err))?;
decoder.read_to_end(&mut decompressed).unwrap();
Some(decompressed)
} else {
None
},
})
}
Ok(Sarc {
header: SarcHeader {
byte_order,
file_size,
data_offset,
version_number,
},
sfat_header: SfatHeader { node_count },
sfat_nodes,
})
}
}
#[cfg(feature = "tar_ninres")]
impl IntoTar for Sarc {
fn into_tar(self, mode: u32) -> Result<Cursor<Vec<u8>>, Error> {
use std::time::SystemTime;
let res = vec![];
let cursor = Cursor::new(res);
let mut builder = tar::Builder::new(cursor);
let mtime = SystemTime::now()
.duration_since(SystemTime::UNIX_EPOCH)
.unwrap()
.as_secs();
self.sfat_nodes
.into_iter()
.map(|node| -> Result<(), Error> {
if let Some(name) = node.path {
let mut header = tar::Header::new_gnu();
header.set_size(node.data.len() as u64);
header.set_mode(mode);
header.set_mtime(mtime);
cfg_if! {
if #[cfg(feature = "zstd")] {
builder.append_data(&mut header, name.clone(), &node.data[..])?;
if let Some(data_deflated) = node.data_decompressed {
let mut header = tar::Header::new_gnu();
header.set_size(data_deflated.len() as u64);
header.set_cksum();
builder.append_data(&mut header, format!("{}.tar", name), &data_deflated[..])?;
}
} else {
header.set_cksum();
builder.append_data(&mut header, name, &node.data[..])?;
}
}
}
Ok(())
})
.collect::<Result<(), Error>>()?;
builder.finish()?;
Ok(builder.into_inner()?)
}
}
#[cfg(test)]
mod tests {
use super::*;
use test_case::test_case;
static M1_MODEL_PACK: &[u8] = include_bytes!("../../assets/M1_Model.pack");
static M3_MODEL_PACK: &[u8] = include_bytes!("../../assets/M3_Model.pack");
static MW_MODEL_PACK: &[u8] = include_bytes!("../../assets/MW_Model.pack");
#[test_case(M1_MODEL_PACK; "with M1 Model Pack")]
#[test_case(M3_MODEL_PACK; "with M3 Model Pack")]
#[test_case(MW_MODEL_PACK; "with MW Model Pack")]
fn test_read_sarc(sarc_file: &[u8]) {
let sarc_file = Sarc::new(sarc_file);
assert!(sarc_file.is_ok());
}
#[cfg(feature = "tar")]
#[test_case(M1_MODEL_PACK, "M1_Model.tar"; "with M1 Model Pack")]
#[test_case(M3_MODEL_PACK, "M3_Model.tar"; "with M3 Model Pack")]
#[test_case(MW_MODEL_PACK, "MW_Model.tar"; "with MW Model Pack")]
fn test_into_tar<'a>(sarc_file: &'a [u8], file_name: &str) -> Result<(), Error> {
let sarc_file = Sarc::new(sarc_file)?;
let tar = sarc_file.into_tar(0o644)?;
use std::io::Write;
let mut file = std::fs::File::create(file_name)?;
file.write_all(&tar.into_inner()[..])?;
Ok(())
}
}