firefox-main/third_party/rust/wasm-encoder/src
Name Description Size Coverage
component 52 %
component.rs 4293 -
core 98 %
core.rs 4357 -
lib.rs A WebAssembly encoder. The main builder is the [`Module`]. You can build a section with a section-specific builder, like [`TypeSection`] or [`ImportSection`], and then add it to the module with [`Module::section`]. When you are finished building the module, call either [`Module::as_slice`] or [`Module::finish`] to get the encoded bytes. The former gives a shared reference to the underlying bytes as a slice, while the latter gives you ownership of them as a vector. # Example If we wanted to build this module: ```wasm (module (type (func (param i32 i32) (result i32))) (func (type 0) local.get 0 local.get 1 i32.add) (export "f" (func 0))) ``` then we would do this: ``` use wasm_encoder::{ CodeSection, ExportKind, ExportSection, Function, FunctionSection, 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.ty().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.instructions() .local_get(0) .local_get(1) .i32_add() .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()); ``` 5536 -
raw.rs 677 100 %
reencode -
reencode.rs Conversions from `wasmparser` to `wasm-encoder` to [`Reencode`] parsed wasm. The [`RoundtripReencoder`] allows encoding identical wasm to the parsed input. 78147 -