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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /third_party/rust/wasm-encoder/src/component/start.rs | |
parent | Initial commit. (diff) | |
download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/wasm-encoder/src/component/start.rs')
-rw-r--r-- | third_party/rust/wasm-encoder/src/component/start.rs | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/third_party/rust/wasm-encoder/src/component/start.rs b/third_party/rust/wasm-encoder/src/component/start.rs new file mode 100644 index 0000000000..d4b60e1dfc --- /dev/null +++ b/third_party/rust/wasm-encoder/src/component/start.rs @@ -0,0 +1,52 @@ +use crate::{ComponentSection, ComponentSectionId, Encode}; + +/// An encoder for the start section of WebAssembly components. +/// +/// # Example +/// +/// ``` +/// use wasm_encoder::{Component, ComponentStartSection}; +/// +/// let start = ComponentStartSection { function_index: 0, args: [0, 1], results: 1 }; +/// +/// let mut component = Component::new(); +/// component.section(&start); +/// +/// let bytes = component.finish(); +/// ``` +#[derive(Clone, Debug)] +pub struct ComponentStartSection<A> { + /// The index to the start function. + pub function_index: u32, + /// The arguments to pass to the start function. + /// + /// An argument is an index to a value. + pub args: A, + /// The number of expected results for the start function. + /// + /// This should match the number of results for the type of + /// the function referenced by `function_index`. + pub results: u32, +} + +impl<A> Encode for ComponentStartSection<A> +where + A: AsRef<[u32]>, +{ + fn encode(&self, sink: &mut Vec<u8>) { + let mut bytes = Vec::new(); + self.function_index.encode(&mut bytes); + self.args.as_ref().encode(&mut bytes); + self.results.encode(&mut bytes); + bytes.encode(sink); + } +} + +impl<A> ComponentSection for ComponentStartSection<A> +where + A: AsRef<[u32]>, +{ + fn id(&self) -> u8 { + ComponentSectionId::Start.into() + } +} |