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
|
<div align="center">
<h1><code>wasm-encoder</code></h1>
<strong>A <a href="https://bytecodealliance.org/">Bytecode Alliance</a> project</strong>
<p>
<strong>A WebAssembly encoder for Rust.</strong>
</p>
<p>
<a href="https://crates.io/crates/wasm-encoder"><img src="https://img.shields.io/crates/v/wasm-encoder.svg?style=flat-square" alt="Crates.io version" /></a>
<a href="https://crates.io/crates/wasm-encoder"><img src="https://img.shields.io/crates/d/wasm-encoder.svg?style=flat-square" alt="Download" /></a>
<a href="https://docs.rs/wasm-encoder/"><img src="https://img.shields.io/static/v1?label=docs&message=wasm-encoder&color=blue&style=flat-square" alt="docs.rs docs" /></a>
</p>
</div>
## Usage
Add `wasm-encoder` to your `Cargo.toml`
```sh
$ cargo add wasm-encoder
```
And then you can encode WebAssembly binaries via:
```rust
use wasm_encoder::{
CodeSection, ExportKind, ExportSection, Function, FunctionSection, Instruction,
Module, TypeSection, ValType,
};
let mut module = Module::new();
// Encode the type section.
let mut types = TypeSection::new();
let params = vec![ValType::I32, ValType::I32];
let results = vec![ValType::I32];
types.function(params, results);
module.section(&types);
// Encode the function section.
let mut functions = FunctionSection::new();
let type_index = 0;
functions.function(type_index);
module.section(&functions);
// Encode the export section.
let mut exports = ExportSection::new();
exports.export("f", ExportKind::Func, 0);
module.section(&exports);
// Encode the code section.
let mut codes = CodeSection::new();
let locals = vec![];
let mut f = Function::new(locals);
f.instruction(&Instruction::LocalGet(0));
f.instruction(&Instruction::LocalGet(1));
f.instruction(&Instruction::I32Add);
f.instruction(&Instruction::End);
codes.function(&f);
module.section(&codes);
// Extract the encoded Wasm bytes for this module.
let wasm_bytes = module.finish();
// We generated a valid Wasm module!
assert!(wasmparser::validate(&wasm_bytes).is_ok());
```
# License
This project is licensed under the Apache 2.0 license with the LLVM exception.
See [LICENSE](LICENSE) for more details.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this project by you, as defined in the Apache-2.0 license,
shall be licensed as above, without any additional terms or conditions.
|
