+pub struct ImportResolver<'mod_lifetime, 'crate_lft: 'mod_lifetime> {
+ module_path: &'mod_lifetime str,
+ imports: HashMap<syn::Ident, (String, syn::Path)>,
+ declared: HashMap<syn::Ident, DeclType<'crate_lft>>,
+ priv_modules: HashSet<syn::Ident>,
+}
+impl<'mod_lifetime, 'crate_lft: 'mod_lifetime> ImportResolver<'mod_lifetime, 'crate_lft> {
+ fn process_use_intern(imports: &mut HashMap<syn::Ident, (String, syn::Path)>, u: &syn::UseTree, partial_path: &str, mut path: syn::punctuated::Punctuated<syn::PathSegment, syn::token::Colon2>) {
+ match u {
+ syn::UseTree::Path(p) => {
+ let new_path = format!("{}{}::", partial_path, p.ident);
+ path.push(syn::PathSegment { ident: p.ident.clone(), arguments: syn::PathArguments::None });
+ Self::process_use_intern(imports, &p.tree, &new_path, path);
+ },
+ syn::UseTree::Name(n) => {
+ let full_path = format!("{}{}", partial_path, n.ident);
+ path.push(syn::PathSegment { ident: n.ident.clone(), arguments: syn::PathArguments::None });
+ imports.insert(n.ident.clone(), (full_path, syn::Path { leading_colon: Some(syn::Token![::](Span::call_site())), segments: path }));
+ },
+ syn::UseTree::Group(g) => {
+ for i in g.items.iter() {
+ Self::process_use_intern(imports, i, partial_path, path.clone());
+ }
+ },
+ syn::UseTree::Rename(r) => {
+ let full_path = format!("{}{}", partial_path, r.ident);
+ path.push(syn::PathSegment { ident: r.ident.clone(), arguments: syn::PathArguments::None });
+ imports.insert(r.rename.clone(), (full_path, syn::Path { leading_colon: Some(syn::Token![::](Span::call_site())), segments: path }));
+ },
+ syn::UseTree::Glob(_) => {
+ eprintln!("Ignoring * use for {} - this may result in resolution failures", partial_path);
+ },
+ }
+ }
+
+ fn process_use(imports: &mut HashMap<syn::Ident, (String, syn::Path)>, u: &syn::ItemUse) {
+ if let syn::Visibility::Public(_) = u.vis {
+ // We actually only use these for #[cfg(fuzztarget)]
+ eprintln!("Ignoring pub(use) tree!");
+ return;
+ }
+ if u.leading_colon.is_some() { eprintln!("Ignoring leading-colon use!"); return; }
+ Self::process_use_intern(imports, &u.tree, "", syn::punctuated::Punctuated::new());
+ }
+
+ fn insert_primitive(imports: &mut HashMap<syn::Ident, (String, syn::Path)>, id: &str) {
+ let ident = syn::Ident::new(id, Span::call_site());
+ let mut path = syn::punctuated::Punctuated::new();
+ path.push(syn::PathSegment { ident: ident.clone(), arguments: syn::PathArguments::None });
+ imports.insert(ident, (id.to_owned(), syn::Path { leading_colon: Some(syn::Token![::](Span::call_site())), segments: path }));
+ }
+
+ pub fn new(module_path: &'mod_lifetime str, contents: &'crate_lft [syn::Item]) -> Self {
+ let mut imports = HashMap::new();
+ // Add primitives to the "imports" list:
+ Self::insert_primitive(&mut imports, "bool");
+ Self::insert_primitive(&mut imports, "u64");
+ Self::insert_primitive(&mut imports, "u32");
+ Self::insert_primitive(&mut imports, "u16");
+ Self::insert_primitive(&mut imports, "u8");
+ Self::insert_primitive(&mut imports, "usize");
+ Self::insert_primitive(&mut imports, "str");
+ Self::insert_primitive(&mut imports, "String");
+
+ // These are here to allow us to print native Rust types in trait fn impls even if we don't
+ // have C mappings:
+ Self::insert_primitive(&mut imports, "Result");
+ Self::insert_primitive(&mut imports, "Vec");
+ Self::insert_primitive(&mut imports, "Option");
+
+ let mut declared = HashMap::new();
+ let mut priv_modules = HashSet::new();
+
+ for item in contents.iter() {
+ match item {
+ syn::Item::Use(u) => Self::process_use(&mut imports, &u),
+ syn::Item::Struct(s) => {
+ if let syn::Visibility::Public(_) = s.vis {
+ match export_status(&s.attrs) {
+ ExportStatus::Export => { declared.insert(s.ident.clone(), DeclType::StructImported); },
+ ExportStatus::NoExport => { declared.insert(s.ident.clone(), DeclType::StructIgnored); },
+ ExportStatus::TestOnly => continue,
+ }
+ }
+ },
+ syn::Item::Enum(e) => {
+ if let syn::Visibility::Public(_) = e.vis {
+ match export_status(&e.attrs) {
+ ExportStatus::Export if is_enum_opaque(e) => { declared.insert(e.ident.clone(), DeclType::EnumIgnored); },
+ ExportStatus::Export => { declared.insert(e.ident.clone(), DeclType::MirroredEnum); },
+ _ => continue,
+ }
+ }
+ },
+ syn::Item::Trait(t) if export_status(&t.attrs) == ExportStatus::Export => {
+ if let syn::Visibility::Public(_) = t.vis {
+ declared.insert(t.ident.clone(), DeclType::Trait(t));
+ }
+ },
+ syn::Item::Mod(m) => {
+ priv_modules.insert(m.ident.clone());
+ },
+ _ => {},
+ }
+ }
+
+ Self { module_path, imports, declared, priv_modules }
+ }
+
+ pub fn get_declared_type(&self, ident: &syn::Ident) -> Option<&DeclType<'crate_lft>> {
+ self.declared.get(ident)
+ }
+
+ pub fn maybe_resolve_declared(&self, id: &syn::Ident) -> Option<&DeclType<'crate_lft>> {
+ self.declared.get(id)
+ }
+
+ pub fn maybe_resolve_ident(&self, id: &syn::Ident) -> Option<String> {
+ if let Some((imp, _)) = self.imports.get(id) {
+ Some(imp.clone())
+ } else if self.declared.get(id).is_some() {
+ Some(self.module_path.to_string() + "::" + &format!("{}", id))
+ } else { None }
+ }
+
+ pub fn maybe_resolve_non_ignored_ident(&self, id: &syn::Ident) -> Option<String> {
+ if let Some((imp, _)) = self.imports.get(id) {
+ Some(imp.clone())
+ } else if let Some(decl_type) = self.declared.get(id) {
+ match decl_type {
+ DeclType::StructIgnored => None,
+ _ => Some(self.module_path.to_string() + "::" + &format!("{}", id)),
+ }
+ } else { None }
+ }
+
+ pub fn maybe_resolve_path(&self, p_arg: &syn::Path, generics: Option<&GenericTypes>) -> Option<String> {
+ let p = if let Some(gen_types) = generics {
+ if let Some((_, synpath)) = gen_types.maybe_resolve_path(p_arg) {
+ synpath
+ } else { p_arg }
+ } else { p_arg };
+
+ if p.leading_colon.is_some() {
+ Some(p.segments.iter().enumerate().map(|(idx, seg)| {
+ format!("{}{}", if idx == 0 { "" } else { "::" }, seg.ident)
+ }).collect())
+ } else if let Some(id) = p.get_ident() {
+ self.maybe_resolve_ident(id)
+ } else {
+ if p.segments.len() == 1 {
+ let seg = p.segments.iter().next().unwrap();
+ return self.maybe_resolve_ident(&seg.ident);
+ }
+ let mut seg_iter = p.segments.iter();
+ let first_seg = seg_iter.next().unwrap();
+ let remaining: String = seg_iter.map(|seg| {
+ format!("::{}", seg.ident)
+ }).collect();
+ if let Some((imp, _)) = self.imports.get(&first_seg.ident) {
+ if remaining != "" {
+ Some(imp.clone() + &remaining)
+ } else {
+ Some(imp.clone())
+ }
+ } else if let Some(_) = self.priv_modules.get(&first_seg.ident) {
+ Some(format!("{}::{}{}", self.module_path, first_seg.ident, remaining))
+ } else { None }
+ }
+ }
+
+ /// Map all the Paths in a Type into absolute paths given a set of imports (generated via process_use_intern)
+ pub fn resolve_imported_refs(&self, mut ty: syn::Type) -> syn::Type {
+ match &mut ty {
+ syn::Type::Path(p) => {
+ if let Some(ident) = p.path.get_ident() {
+ if let Some((_, newpath)) = self.imports.get(ident) {
+ p.path = newpath.clone();
+ }
+ } else { unimplemented!(); }
+ },
+ syn::Type::Reference(r) => {
+ r.elem = Box::new(self.resolve_imported_refs((*r.elem).clone()));
+ },
+ syn::Type::Slice(s) => {
+ s.elem = Box::new(self.resolve_imported_refs((*s.elem).clone()));
+ },
+ syn::Type::Tuple(t) => {
+ for e in t.elems.iter_mut() {
+ *e = self.resolve_imported_refs(e.clone());
+ }
+ },
+ _ => unimplemented!(),
+ }
+ ty
+ }
+}
+