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#33 in WebAssembly

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Used in 169 crates (40 directly)

Apache-2.0 WITH LLVM-exception

400KB
9K SLoC

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.

No runtime deps