io_unity 0.3.0

io_unity is a lib for read unity assets
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

use super::version11::TypeTreeNode;
use super::version4::FileIdentifier;
use super::version6::Object;
use super::{BuildTarget, SerializedFileCommonHeader};
use super::{Serialized, SerializedFileFormatVersion};
use crate::type_tree::{reader::TypeTreeObjectBinReadClassArgs, TypeField};
use crate::until::Endian;
use binrw::{binrw, NullString};
use std::borrow::Cow;
use std::sync::Arc;

#[binrw]
#[brw(big)]
#[derive(Debug, PartialEq)]
pub struct SerializedFile {
    header: SerializedFileCommonHeader,
    #[br(offset = (header.file_size - header.metadata_size) as u64)]
    endianess: Endian,
    #[br(is_little = endianess == Endian::Little)]
    content: SerializedFileContent,
}

impl Serialized for SerializedFile {
    fn get_serialized_file_version(&self) -> &SerializedFileFormatVersion {
        &self.header.version
    }

    fn get_data_offset(&self) -> u64 {
        self.header.data_offset as u64
    }

    fn get_endianess(&self) -> &Endian {
        &self.endianess
    }

    fn get_objects_metadata(&self) -> Vec<super::Object> {
        self.content
            .objects
            .iter()
            .map(|obj| super::Object {
                path_id: obj.path_id as i64,
                byte_start: obj.byte_start as u64,
                byte_size: obj.byte_size,
                class: obj.class_id as i32,
                type_id: obj.type_id as usize,
            })
            .collect()
    }

    fn get_unity_version(&self) -> String {
        "".to_string()
    }

    fn get_target_platform(&self) -> &BuildTarget {
        &BuildTarget::UnknownPlatform
    }

    fn get_enable_type_tree(&self) -> bool {
        true
    }

    fn get_type_object_args_by_type_id(
        &self,
        type_id: usize,
    ) -> Option<TypeTreeObjectBinReadClassArgs> {
        let stypetree = self
            .content
            .types
            .iter()
            .find(|tp| tp.class_id == type_id as i32)?;
        let type_tree = &stypetree.type_tree;
        let mut type_fields = Vec::new();

        fn build_type_fields(
            type_fields: &mut Vec<Arc<Box<dyn TypeField + Send + Sync>>>,
            type_tree: &TypeTree,
        ) {
            type_fields.push(Arc::new(Box::new(TypeTreeNode {
                level: type_tree.level,
                type_name: type_tree.type_name.to_string(),
                name: type_tree.name.to_string(),
                byte_size: type_tree.byte_size,
                index: 0,
                type_flags: type_tree.type_flags,
                version: type_tree.version,
                meta_flag: 0,
            }) as Box<dyn TypeField + Send + Sync>));

            for tp in &type_tree.children {
                build_type_fields(type_fields, tp);
            }
        }
        build_type_fields(&mut type_fields, type_tree);
        Some(TypeTreeObjectBinReadClassArgs::new(
            stypetree.class_id,
            type_fields,
        ))
    }
    fn get_externals(&self) -> Cow<Vec<super::version17::FileIdentifier>> {
        let externals = self
            .content
            .externals
            .iter()
            .map(|o| super::version17::FileIdentifier {
                temp_empty: NullString::default(),
                guid: [0u8; 16],
                r#type: 0,
                path: o.path.clone(),
            })
            .collect();
        return Cow::Owned(externals);
    }
}

#[binrw]
#[derive(Debug, PartialEq)]
struct SerializedFileContent {
    type_count: u32,
    #[br(count = type_count)]
    types: Vec<SerializedType>,
    object_count: i32,
    #[br(count = object_count)]
    objects: Vec<Object>,
    externals_count: i32,
    #[br(count = externals_count)]
    externals: Vec<FileIdentifier>,
}

#[binrw]
#[derive(Debug, PartialEq)]
pub struct SerializedType {
    pub class_id: i32,
    pub type_tree: TypeTree,
}

#[binrw]
#[br(import { level: i32 = 0})]
#[derive(Debug, Clone, PartialEq)]
pub struct TypeTree {
    #[br(calc = level)]
    pub level: i32,
    pub type_name: NullString,
    pub name: NullString,
    pub byte_size: i32,
    pub type_flags: i32,
    pub version: i32,
    pub children_count: i32,
    #[br(args { count: children_count as usize, inner: TypeTreeBinReadArgs::builder().level(level + 1).finalize() })]
    pub children: Vec<TypeTree>,
}