ebml_iterable_specification/
empty_spec.rs

1use super::{EbmlSpecification, EbmlTag, Master, TagDataType, PathPart};
2
3///
4/// An empty specification for use with examples or testing.
5///
6/// This struct isn't intended for production use and should only be used for examples or PoCs. Use at your own risk - may change in the future without warning.
7///
8/// # NOT SUITABLE FOR PRODUCTION
9///
10#[derive(Debug, Clone, PartialEq, Eq, Ord, PartialOrd)]
11pub struct EmptySpec {
12    id: u64, 
13    children: Option<Master<EmptySpec>>,
14    data: Option<Vec<u8>>,
15}
16
17impl EmptySpec {
18    pub fn with_children(id: u64, children: Vec<EmptySpec>) -> Self {
19        EmptySpec::get_master_tag(id, Master::Full(children)).unwrap()
20    }
21
22    pub fn with_data(id: u64, data: &[u8]) -> Self {
23        EmptySpec::get_binary_tag(id, data).unwrap()
24    }
25}
26
27impl EbmlSpecification<EmptySpec> for EmptySpec {
28    fn get_tag_data_type(_id: u64) -> Option<TagDataType> {
29        Some(TagDataType::Binary)
30    }
31
32    fn get_path_by_id(_id: u64) -> &'static [PathPart] {
33        &[]
34    }
35
36    fn get_unsigned_int_tag(_id: u64, _data: u64) -> Option<EmptySpec> {
37        None
38    }
39
40    fn get_signed_int_tag(_id: u64, _data: i64) -> Option<EmptySpec> {
41        None
42    }
43
44    fn get_utf8_tag(_id: u64, _data: String) -> Option<EmptySpec> {
45        None
46    }
47
48    fn get_binary_tag(id: u64, data: &[u8]) -> Option<EmptySpec> {
49        Some(EmptySpec {
50            id,
51            children: None,
52            data: Some(data.to_vec()),
53        })
54    }
55
56    fn get_float_tag(_id: u64, _data: f64) -> Option<EmptySpec> {
57        None
58    }
59
60    fn get_master_tag(id: u64, data: Master<EmptySpec>) -> Option<EmptySpec> {
61        Some(EmptySpec {
62            id,
63            children: Some(data),
64            data: None,
65        })
66    }
67
68    fn get_raw_tag(id: u64, data: &[u8]) -> EmptySpec {
69        EmptySpec::get_binary_tag(id, data).expect("get binary tag for EmptySpec should always return Some")
70    }
71}
72
73impl EbmlTag<EmptySpec> for EmptySpec {
74
75    fn get_id(&self) -> u64 { 
76        self.id
77    }
78
79    fn as_unsigned_int(&self) -> Option<&u64> {
80        None
81    }
82
83    fn as_signed_int(&self) -> Option<&i64> {
84        None
85    }
86
87    fn as_utf8(&self) -> Option<&str> {
88        None
89    }
90
91    fn as_binary(&self) -> Option<&[u8]> {
92        self.data.as_deref()
93    }
94
95    fn as_float(&self) -> Option<&f64> {
96        None
97    }
98
99    fn as_master(&self) -> Option<&Master<EmptySpec>> {
100        match &self.children {
101            Some(children) => Some(children),
102            None => None
103        }
104    }
105}
ebml_iterable_specification/empty_spec.rs

ebml_iterable_specification/
empty_spec.rs
