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use crate::TypeId;
use crate::{FuncId, WasmInterfaceTypes, WitIdsToIndices, WitIndicesToIds};
use anyhow::Result;
use id_arena::{Arena, Id};
#[derive(Debug, Default)]
pub struct Imports {
arena: Arena<Import>,
}
#[derive(Debug)]
pub struct Import {
id: ImportId,
pub func: FuncId,
pub module: String,
pub name: String,
}
pub type ImportId = Id<Import>;
impl WasmInterfaceTypes {
pub(crate) fn parse_imports(
&mut self,
imports: wit_parser::Imports,
wids: &mut WitIndicesToIds,
) -> Result<()> {
for import in imports {
let import = import?;
let ty = wids.ty(import.ty)?;
let (func, _) = self.add_import_func(import.module, import.name, ty);
wids.funcs.push(func);
}
Ok(())
}
pub(crate) fn encode_imports(
&self,
writer: &mut wit_writer::Writer,
wids: &mut WitIdsToIndices,
) {
let mut w = writer.imports(self.imports.arena.len() as u32);
for import in self.imports.iter() {
let ty = self.funcs.get(import.func).ty;
w.add(&import.module, &import.name, wids.ty(ty));
wids.push_func(import.func);
}
}
pub fn add_import_func(&mut self, module: &str, name: &str, ty: TypeId) -> (FuncId, ImportId) {
let func = self.funcs.add_import(ty, self.imports.arena.next_id());
(func, self.imports.add(module, name, func))
}
}
impl Imports {
pub fn get(&self, id: ImportId) -> &Import {
&self.arena[id]
}
pub fn get_mut(&mut self, id: ImportId) -> &mut Import {
&mut self.arena[id]
}
pub fn iter(&self) -> impl Iterator<Item = &Import> {
self.arena.iter().map(|(_, f)| f)
}
pub fn iter_mut(&mut self) -> impl Iterator<Item = &mut Import> {
self.arena.iter_mut().map(|(_, f)| f)
}
pub fn add(&mut self, module: &str, name: &str, func: FuncId) -> ImportId {
self.arena.alloc_with_id(|id| Import {
id,
module: module.to_string(),
name: name.to_string(),
func,
})
}
}
impl Import {
pub fn id(&self) -> ImportId {
self.id
}
}