wasm/core/reader/
section_header.rs

1use crate::core::reader::span::Span;
2use crate::core::reader::WasmReader;
3use crate::core::utils::ToUsizeExt;
4use crate::ValidationError;
5
6#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
7pub enum SectionTy {
8    Custom = 0,
9    Type = 1,
10    Import = 2,
11    Function = 3,
12    Table = 4,
13    Memory = 5,
14    Global = 6,
15    Export = 7,
16    Start = 8,
17    Element = 9,
18    Code = 10,
19    Data = 11,
20    DataCount = 12,
21}
22
23impl SectionTy {
24    pub fn read(wasm: &mut WasmReader) -> Result<Self, ValidationError> {
25        use SectionTy::*;
26        let ty = match wasm.read_u8()? {
27            0 => Custom,
28            1 => Type,
29            2 => Import,
30            3 => Function,
31            4 => Table,
32            5 => Memory,
33            6 => Global,
34            7 => Export,
35            8 => Start,
36            9 => Element,
37            10 => Code,
38            11 => Data,
39            12 => DataCount,
40            other => return Err(ValidationError::MalformedSectionTypeDiscriminator(other)),
41        };
42
43        Ok(ty)
44    }
45}
46
47#[derive(Debug)]
48pub(crate) struct SectionHeader {
49    pub ty: SectionTy,
50    pub contents: Span,
51}
52
53impl SectionHeader {
54    pub fn read(wasm: &mut WasmReader) -> Result<Self, ValidationError> {
55        let ty = SectionTy::read(wasm)?;
56        let size: u32 = wasm.read_var_u32()?;
57        let contents_span = wasm.make_span(size.into_usize())?;
58
59        Ok(SectionHeader {
60            ty,
61            contents: contents_span,
62        })
63    }
64}
wasm/core/reader/section_header.rs

wasm/core/reader/
section_header.rs
