webassembly-rs

A Rust library provide opcode values and conversions of foundation types (i32,f64,etc.) used at the bytecode level in WebAssembly. This is mostly meant to be used by compilers, interpreters, parsers, encoders. For a more powerful library, checkout watson.

depends only on #![no_std] and alloc
includes all opcodes
full parser and encoder
tested against real WebAssembly binaries

Usage

[dependencies]
webassembly = "0.8"

Testing with Official Spec

# Quick test (15 unit tests)
cargo test

# Full test with spec suite (17 tests total)  
cargo test -- --ignored

# Or use make targets
make test-all

Test Results

✓ 15 unit tests - LEB128, section parsing, round-trips, real wasm files ✓ 2 spec integration tests - Parses 7 official test binaries:

sample.wasm (from WebAssembly/spec repo)
minimal, type_only, import_only, memory_only, export_only, custom_only

Setup (optional - for updating spec tests)

# Already set up! But to update to latest spec tests:
git submodule update --remote tests/spec-tests
./generate-test-wasm.py  # Regenerate test files

License

This project is licensed under either of

Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in webassembly by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.