#wasm-module #wasm-binary #binary-file #parser

no-std wasmparser-nostd

A simple event-driven library for parsing WebAssembly binary files

8 releases (breaking)

0.100.2 Apr 21, 2024
0.100.1 Feb 11, 2023
0.99.0 Feb 1, 2023
0.91.0 Sep 21, 2022
0.82.0 Jan 22, 2022

#104 in WebAssembly

Download history 45956/week @ 2024-02-15 44337/week @ 2024-02-22 42016/week @ 2024-02-29 42068/week @ 2024-03-07 43539/week @ 2024-03-14 53458/week @ 2024-03-21 47688/week @ 2024-03-28 56704/week @ 2024-04-04 60408/week @ 2024-04-11 60305/week @ 2024-04-18 47579/week @ 2024-04-25 47686/week @ 2024-05-02 43866/week @ 2024-05-09 51812/week @ 2024-05-16 59406/week @ 2024-05-23 51676/week @ 2024-05-30

213,735 downloads per month
Used in 176 crates (7 directly)

Apache-2.0 WITH LLVM-exception

660KB
14K SLoC

This is a fork of the wasmparser crate by the Bytecode Alliance with the sole purpose to add no_std support with a focus on embedded environments.

This crate will be deprecated as soon as the original wasmparser crate itself supports no_std.

Note: As of version 0.99.0 and above the Url type from the url crate was replaced with a simple String in order to port the entire crate to no_std. This is because the complex url crate itself does not support no_std compilation.

The WebAssembly binary file decoder in Rust

A Bytecode Alliance project

crates.io link docs.rs docs

The decoder library provides lightweight and fast decoding/parsing of WebAssembly binary files.

The other goal is minimal memory footprint. For this reason, there is no AST or IR of WebAssembly data.

See also its sibling at https://github.com/wasdk/wasmparser

Documentation

The documentation and examples can be found at the https://docs.rs/wasmparser/

Fuzzing

To fuzz test wasmparser.rs, switch to a nightly Rust compiler and install cargo-fuzz:

cargo install cargo-fuzz

Then, from the root of the repository, run:

cargo fuzz run parse

If you want to use files as seeds for the fuzzer, add them to fuzz/corpus/parse/ and restart cargo-fuzz.

Dependencies