parity-wasm

Low-level WebAssembly format library.

Documentation

Rust WebAssembly format serializing/deserializing

```rust

extern crate parity_wasm;

let module = paritywasm::deserializefile("./res/cases/v1/hello.wasm").unwrap(); assert!(module.codesection().issome());

let codesection = module.codesection().unwrap(); // Part of the module with functions code

println!("Function count in wasm file: {}", code_section.bodies().len()); ```

Wabt Test suite

parity-wasm supports full wabt testsuite (https://github.com/WebAssembly/testsuite), running asserts that invloves deserialization.

To run testsuite: - make sure you have all prerequisites to build wabt (since parity-wasm builds it internally using wabt-rs, see https://github.com/WebAssembly/wabt) - checkout with submodules (git submodule update --init --recursive) - run cargo test --release --manifest-path=spec/Cargo.toml

Decoder can be fuzzed with cargo-fuzz using wasm-opt (https://github.com/WebAssembly/binaryen):

make sure you have all prerequisites to build binaryen and cargo-fuzz (cmake and a C++11 toolchain)
checkout with submodules (git submodule update --init --recursive)
install cargo fuzz subcommand with cargo install cargo-fuzz
set rustup to use a nightly toolchain, because cargo fuzz uses a rust compiler plugin: rustup override set nightly
run cargo fuzz run deserialize

`no_std` crates

This crate has a feature, std, that is enabled by default. To use this crate in a no_std context, add the following to your Cargo.toml:

toml [dependencies] parity-wasm = { version = "0.29", default-features = false }

License

parity-wasm is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), at your choice.

See LICENSE-APACHE, and LICENSE-MIT for details.

Contribution