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|
use crate::{
common_strings::COMMON_STRINGS,
helper::{AlignExt, Endianness, ReadExt},
};
use anyhow::Result;
use log::{debug, trace};
use std::io::{Cursor, Read, Seek};
#[derive(Debug)]
pub struct TypeTreeNode {
pub version: u16,
pub level: u8,
pub type_flags: u8,
pub type_string: String,
pub name_string: String,
pub byte_size: i32,
pub index: i32,
pub flags: i32,
pub ref_type_hash: u64,
}
#[derive(Debug)]
pub struct SeralizedType {
pub class_id: i32,
pub stripped_type: bool,
pub script_type_index: i16,
pub script_id: u128,
pub type_tree: Vec<TypeTreeNode>,
pub type_deps: Vec<u32>,
}
#[derive(Debug)]
pub struct ObjectInfo {
path_id: i64,
data_offset: u64,
data_size: u32,
type_id: i32,
}
#[derive(Debug)]
pub struct Script {
file_index: u32,
identifier: i64,
}
#[derive(Debug)]
pub struct External {
something: String,
guid: u128,
r#type: i32,
path_name: String,
}
#[derive(Debug)]
pub struct SerializedFile {
pub types: Vec<SeralizedType>,
pub externals: Vec<External>,
pub scripts: Vec<Script>,
pub objects: Vec<ObjectInfo>,
pub user_string: String,
}
pub fn read_serialized_file(mut file: impl Read + Seek) -> Result<SerializedFile> {
let mut metadata_size = file.read_u32_be()?;
let mut file_size = file.read_u32_be()? as u64;
let format = file.read_u32_be()?;
let mut data_offset = file.read_u32_be()? as u64;
debug!("format={format}");
assert!(format >= 9);
let e = match file.read_u32_be()? {
0 => Endianness::Little,
_ => Endianness::Big,
};
debug!("endianess={e:?}");
if format >= 22 {
metadata_size = file.read_u32(e)?;
file_size = file.read_u64(e)?;
data_offset = file.read_u64(e)?;
file.read_u64(e)?;
}
debug!("metadata_size={metadata_size}");
debug!("file_size={file_size}");
debug!("data_offset={data_offset}");
let generator_version = file.read_cstr()?;
let target_platform = file.read_u32_le()?;
debug!("generator_version={generator_version:?}");
debug!("target_platform={target_platform}");
let has_type_trees = file.read_u8()? != 0;
let num_types = file.read_u32(e)?;
debug!("has_type_trees={has_type_trees:?}");
debug!("num_types={num_types}");
let mut types = Vec::new();
for _ in 0..num_types {
let class_id = file.read_i32(e)?;
let stripped_type = file.read_u8()? != 0;
let script_type_index = file.read_i16(e)?;
let mut script_id = 0;
// TODO reftype
if class_id == 114 {
script_id = file.read_u128_be()?;
}
let _old_hash = file.read_u128_be()?;
trace!("class_id={class_id}");
trace!("stripped_type={stripped_type}");
trace!("script_type_index={script_type_index}");
trace!("script_id={script_id}");
let mut type_deps = Vec::new();
let mut type_tree = Vec::new();
if has_type_trees {
let num_nodes = file.read_u32(e)?;
let size = file.read_u32(e)?;
trace!("tree:num_nodes={num_nodes}");
trace!("tree:size={size}");
let mut node_data = vec![0u8; num_nodes as usize * 32];
file.read_exact(&mut node_data)?;
let mut node_data = Cursor::new(node_data);
let mut string_data = vec![0u8; size as usize];
file.read_exact(&mut string_data)?;
let get_string = |off: u32| {
let data = if off & 0x80000000 != 0 {
let off = off & 0x7fffffff;
&COMMON_STRINGS[off as usize..]
} else {
&string_data[off as usize..]
};
String::from_utf8(
data.iter()
.copied()
.take_while(|e| *e != 0)
.collect::<Vec<u8>>(),
)
};
for _ in 0..num_nodes {
type_tree.push(TypeTreeNode {
version: node_data.read_u16(e)?,
level: node_data.read_u8()?,
type_flags: node_data.read_u8()?,
type_string: get_string(node_data.read_u32(e)?)?,
name_string: get_string(node_data.read_u32(e)?)?,
byte_size: node_data.read_i32(e)?,
index: node_data.read_i32(e)?,
flags: node_data.read_i32(e)?,
ref_type_hash: node_data.read_u64(e)?,
});
}
if format >= 21 {
let num_deps = file.read_u32(e)?;
trace!("num_deps={num_deps}");
for _ in 0..num_deps {
type_deps.push(file.read_u32(e)?);
}
}
}
types.push(SeralizedType {
class_id,
script_id,
script_type_index,
stripped_type,
type_deps,
type_tree,
})
}
let num_objects = file.read_u32(e)?;
debug!("num_objects={num_objects}");
let mut objects = Vec::new();
for _ in 0..num_objects {
file.align(4)?;
let path_id = file.read_i64(e)?;
let data_offset = if format >= 22 {
file.align(4)?;
file.read_u64(e)?
} else {
file.read_u32(e)? as u64
} + data_offset;
let data_size = file.read_u32(e)?;
let type_id = file.read_i32(e)?;
objects.push(ObjectInfo {
data_offset,
data_size,
path_id,
type_id,
})
}
let num_scripts = file.read_u32(e)?;
debug!("num_scripts={num_scripts}");
let mut scripts = Vec::new();
for _ in 0..num_scripts {
let file_index = file.read_u32(e)?;
file.align(4)?;
let identifier = file.read_i64(e)?;
scripts.push(Script {
file_index,
identifier,
})
}
let num_externals = file.read_u32(e)?;
debug!("num_externals={num_externals}");
let mut externals = Vec::new();
for _ in 0..num_externals {
let something = file.read_cstr()?;
let guid = file.read_u128_be()?;
let r#type = file.read_i32(e)?;
let path_name = file.read_cstr()?;
externals.push(External {
guid,
path_name,
something,
r#type,
})
}
if format >= 20 {
let num_ref_types = file.read_i32(e)?;
debug!("num_ref_types={num_ref_types}");
// let mut ref_types = Vec::new();
for _ in 0..num_ref_types {
todo!()
}
}
let user_string = file.read_cstr()?;
Ok(SerializedFile {
types,
externals,
objects,
scripts,
user_string,
})
}
|
