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
#![deny(missing_docs)]
#![deny(missing_debug_implementations)]
extern crate parity_wasm;
extern crate twiggy_ir as ir;
extern crate twiggy_traits as traits;
mod wasm;
use parity_wasm::elements;
use std::fs;
use std::io::Read;
use std::path;
pub fn read_and_parse<P: AsRef<path::Path>>(path: P) -> Result<ir::Items, traits::Error> {
let path = path.as_ref();
let mut file = fs::File::open(path)?;
let mut data = vec![];
file.read_to_end(&mut data)?;
match path.extension().and_then(|s| s.to_str()) {
Some("wasm") => if let Ok(items) = parse_wasm(&data) {
return Ok(items);
},
_ => {}
}
parse_fallback(&data)
}
pub fn parse(data: &[u8]) -> Result<ir::Items, traits::Error> {
parse_fallback(data)
}
pub(crate) trait Parse<'a> {
type ItemsExtra;
fn parse_items(
&self,
items: &mut ir::ItemsBuilder,
extra: Self::ItemsExtra,
) -> Result<(), traits::Error>;
type EdgesExtra;
fn parse_edges(
&self,
items: &mut ir::ItemsBuilder,
extra: Self::EdgesExtra,
) -> Result<(), traits::Error>;
}
fn parse_wasm(data: &[u8]) -> Result<ir::Items, traits::Error> {
let mut items = ir::ItemsBuilder::new(data.len() as u32);
let module: elements::Module = elements::deserialize_buffer(data)?;
let module = match module.parse_names() {
Ok(m) | Err((_, m)) => m,
};
module.parse_items(&mut items, ())?;
module.parse_edges(&mut items, ())?;
Ok(items.finish())
}
fn parse_fallback(data: &[u8]) -> Result<ir::Items, traits::Error> {
parse_wasm(data)
}
#[cfg(test)]
mod tests {
#[test]
fn it_works() {
assert_eq!(2 + 2, 4);
}
}