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
use crate::limits::MAX_WASM_CANONICAL_OPTIONS;
use crate::{BinaryReader, FromReader, Result, SectionLimited};
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CanonicalOption {
UTF8,
UTF16,
CompactUTF16,
Memory(u32),
Realloc(u32),
PostReturn(u32),
}
#[derive(Debug, Clone)]
pub enum CanonicalFunction {
Lift {
core_func_index: u32,
type_index: u32,
options: Box<[CanonicalOption]>,
},
Lower {
func_index: u32,
options: Box<[CanonicalOption]>,
},
}
pub type ComponentCanonicalSectionReader<'a> = SectionLimited<'a, CanonicalFunction>;
impl<'a> FromReader<'a> for CanonicalFunction {
fn from_reader(reader: &mut BinaryReader<'a>) -> Result<CanonicalFunction> {
Ok(match reader.read_u8()? {
0x00 => match reader.read_u8()? {
0x00 => {
let core_func_index = reader.read_var_u32()?;
let options = reader
.read_iter(MAX_WASM_CANONICAL_OPTIONS, "canonical options")?
.collect::<Result<_>>()?;
let type_index = reader.read_var_u32()?;
CanonicalFunction::Lift {
core_func_index,
options,
type_index,
}
}
x => return reader.invalid_leading_byte(x, "canonical function lift"),
},
0x01 => match reader.read_u8()? {
0x00 => CanonicalFunction::Lower {
func_index: reader.read_var_u32()?,
options: reader
.read_iter(MAX_WASM_CANONICAL_OPTIONS, "canonical options")?
.collect::<Result<_>>()?,
},
x => return reader.invalid_leading_byte(x, "canonical function lower"),
},
x => return reader.invalid_leading_byte(x, "canonical function"),
})
}
}
impl<'a> FromReader<'a> for CanonicalOption {
fn from_reader(reader: &mut BinaryReader<'a>) -> Result<Self> {
Ok(match reader.read_u8()? {
0x00 => CanonicalOption::UTF8,
0x01 => CanonicalOption::UTF16,
0x02 => CanonicalOption::CompactUTF16,
0x03 => CanonicalOption::Memory(reader.read_var_u32()?),
0x04 => CanonicalOption::Realloc(reader.read_var_u32()?),
0x05 => CanonicalOption::PostReturn(reader.read_var_u32()?),
x => return reader.invalid_leading_byte(x, "canonical option"),
})
}
}