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use crate::{
encode_section, ComponentExportKind, ComponentSection, ComponentSectionId, ComponentValType,
Encode,
};
#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
pub enum TypeBounds {
Eq,
}
impl Encode for TypeBounds {
fn encode(&self, sink: &mut Vec<u8>) {
match self {
Self::Eq => sink.push(0x00),
}
}
}
#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
pub enum ComponentTypeRef {
Module(u32),
Func(u32),
Value(ComponentValType),
Type(TypeBounds, u32),
Instance(u32),
Component(u32),
}
impl ComponentTypeRef {
pub fn kind(&self) -> ComponentExportKind {
match self {
Self::Module(_) => ComponentExportKind::Module,
Self::Func(_) => ComponentExportKind::Func,
Self::Value(_) => ComponentExportKind::Value,
Self::Type(..) => ComponentExportKind::Type,
Self::Instance(_) => ComponentExportKind::Instance,
Self::Component(_) => ComponentExportKind::Component,
}
}
}
impl Encode for ComponentTypeRef {
fn encode(&self, sink: &mut Vec<u8>) {
self.kind().encode(sink);
match self {
Self::Module(idx) | Self::Func(idx) | Self::Instance(idx) | Self::Component(idx) => {
idx.encode(sink);
}
Self::Value(ty) => ty.encode(sink),
Self::Type(bounds, idx) => {
bounds.encode(sink);
idx.encode(sink);
}
}
}
}
#[derive(Clone, Debug, Default)]
pub struct ComponentImportSection {
bytes: Vec<u8>,
num_added: u32,
}
impl ComponentImportSection {
pub fn new() -> Self {
Self::default()
}
pub fn len(&self) -> u32 {
self.num_added
}
pub fn is_empty(&self) -> bool {
self.num_added == 0
}
pub fn import(&mut self, name: &str, ty: ComponentTypeRef) -> &mut Self {
name.encode(&mut self.bytes);
ty.encode(&mut self.bytes);
self.num_added += 1;
self
}
}
impl Encode for ComponentImportSection {
fn encode(&self, sink: &mut Vec<u8>) {
encode_section(sink, self.num_added, &self.bytes);
}
}
impl ComponentSection for ComponentImportSection {
fn id(&self) -> u8 {
ComponentSectionId::Import.into()
}
}