-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
use std::fs::File;
use std::io::Write;
use std::hash;
+use crate::blocks::*;
+
use proc_macro2::{TokenTree, Span};
// The following utils are used purely to build our known types maps - they break down all the
} else { None }
}
+pub fn attrs_derives_clone(attrs: &[syn::Attribute]) -> bool {
+ for attr in attrs.iter() {
+ let tokens_clone = attr.tokens.clone();
+ let mut token_iter = tokens_clone.into_iter();
+ if let Some(token) = token_iter.next() {
+ match token {
+ TokenTree::Group(g) => {
+ if format!("{}", single_ident_generic_path_to_ident(&attr.path).unwrap()) == "derive" {
+ for id in g.stream().into_iter() {
+ if let TokenTree::Ident(i) = id {
+ if i == "Clone" {
+ return true;
+ }
+ }
+ }
+ }
+ },
+ _ => {},
+ }
+ }
+ }
+ false
+}
+
#[derive(Debug, PartialEq)]
pub enum ExportStatus {
Export,
/// The output file for any created template container types, written to as we find new
/// template containers which need to be defined.
pub template_file: &'a mut File,
+ /// Set of containers which are clonable
+ pub clonable_types: HashSet<String>,
}
/// A struct which tracks resolving rust types into C-mapped equivalents, exists for one specific
_ => false,
}
}
+ pub fn is_clonable(&self, ty: &str) -> bool {
+ if self.crate_types.clonable_types.contains(ty) { return true; }
+ if self.is_primitive(ty) { return true; }
+ match ty {
+ "()" => true,
+ "crate::c_types::Signature" => true,
+ "crate::c_types::TxOut" => true,
+ _ => false,
+ }
+ }
/// Gets the C-mapped type for types which are outside of the crate, or which are manually
/// ignored by for some reason need mapping anyway.
fn c_type_from_path<'b>(&self, full_path: &'b str, is_ref: bool, ptr_for_ref: bool) -> Option<&'b str> {
"Result" if !is_ref => {
Some(("match ",
vec![(" { Ok(mut o) => crate::c_types::CResultTempl::ok(".to_string(), "o".to_string()),
- ("), Err(mut e) => crate::c_types::CResultTempl::err(".to_string(), "e".to_string())],
- ") }"))
+ (").into(), Err(mut e) => crate::c_types::CResultTempl::err(".to_string(), "e".to_string())],
+ ").into() }"))
},
"Vec" if !is_ref => {
Some(("Vec::new(); for item in ", vec![(format!(".drain(..) {{ local_{}.push(", var_name), "item".to_string())], "); }"))
// *** C Container Type Equivalent and alias Printing ***
// ******************************************************
- fn write_template_constructor<W: std::io::Write>(&mut self, w: &mut W, container_type: &str, mangled_container: &str, args: &Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) -> bool {
- if container_type == "Result" {
- assert_eq!(args.len(), 2);
- macro_rules! write_fn {
- ($call: expr) => { {
- writeln!(w, "#[no_mangle]\npub extern \"C\" fn {}_{}() -> {} {{", mangled_container, $call, mangled_container).unwrap();
- writeln!(w, "\t{}::CResultTempl::{}(0)\n}}\n", Self::container_templ_path(), $call).unwrap();
- } }
- }
- macro_rules! write_alias {
- ($call: expr, $item: expr) => { {
- write!(w, "#[no_mangle]\npub static {}_{}: extern \"C\" fn (", mangled_container, $call).unwrap();
- if let syn::Type::Path(syn::TypePath { path, .. }) = $item {
- let resolved = self.resolve_path(path, generics);
- if self.is_known_container(&resolved, is_ref) || self.is_transparent_container(&resolved, is_ref) {
- self.write_c_mangled_container_path_intern(w, Self::path_to_generic_args(path), generics,
- &format!("{}", single_ident_generic_path_to_ident(path).unwrap()), is_ref, false, false, false);
- } else {
- self.write_template_generics(w, &mut [$item].iter().map(|t| *t), generics, is_ref, true);
- }
- } else if let syn::Type::Tuple(syn::TypeTuple { elems, .. }) = $item {
- self.write_c_mangled_container_path_intern(w, elems.iter().collect(), generics,
- &format!("{}Tuple", elems.len()), is_ref, false, false, false);
- } else { unimplemented!(); }
- write!(w, ") -> {} =\n\t{}::CResultTempl::<", mangled_container, Self::container_templ_path()).unwrap();
- self.write_template_generics(w, &mut args.iter().map(|t| *t), generics, is_ref, true);
- writeln!(w, ">::{};\n", $call).unwrap();
- } }
- }
- match args[0] {
- syn::Type::Tuple(t) if t.elems.is_empty() => write_fn!("ok"),
- _ => write_alias!("ok", args[0]),
- }
- match args[1] {
- syn::Type::Tuple(t) if t.elems.is_empty() => write_fn!("err"),
- _ => write_alias!("err", args[1]),
- }
- } else if container_type.ends_with("Tuple") {
- write!(w, "#[no_mangle]\npub extern \"C\" fn {}_new(", mangled_container).unwrap();
- for (idx, gen) in args.iter().enumerate() {
- write!(w, "{}{}: ", if idx != 0 { ", " } else { "" }, ('a' as u8 + idx as u8) as char).unwrap();
- if !self.write_c_type_intern(w, gen, None, false, false, false) { return false; }
- }
- writeln!(w, ") -> {} {{", mangled_container).unwrap();
- write!(w, "\t{} {{ ", mangled_container).unwrap();
- for idx in 0..args.len() {
- write!(w, "{}, ", ('a' as u8 + idx as u8) as char).unwrap();
- }
- writeln!(w, "}}\n}}\n").unwrap();
- } else {
- writeln!(w, "").unwrap();
- }
- true
- }
-
- fn write_template_generics<'b, W: std::io::Write>(&self, w: &mut W, args: &mut dyn Iterator<Item=&'b syn::Type>, generics: Option<&GenericTypes>, is_ref: bool, in_crate: bool) {
+ fn write_template_generics<'b, W: std::io::Write>(&mut self, w: &mut W, args: &mut dyn Iterator<Item=&'b syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) -> bool {
+ assert!(!is_ref); // We don't currently support outer reference types
for (idx, t) in args.enumerate() {
if idx != 0 {
write!(w, ", ").unwrap();
}
- if let syn::Type::Tuple(tup) = t {
- if tup.elems.is_empty() {
- write!(w, "u8").unwrap();
- } else {
- write!(w, "{}::C{}TupleTempl<", Self::container_templ_path(), tup.elems.len()).unwrap();
- self.write_template_generics(w, &mut tup.elems.iter(), generics, is_ref, in_crate);
- write!(w, ">").unwrap();
- }
- } else if let syn::Type::Path(p_arg) = t {
- let resolved_generic = self.resolve_path(&p_arg.path, generics);
- if self.is_primitive(&resolved_generic) {
- write!(w, "{}", resolved_generic).unwrap();
- } else if let Some(c_type) = self.c_type_from_path(&resolved_generic, is_ref, false) {
- if self.is_known_container(&resolved_generic, is_ref) {
- write!(w, "{}::C{}Templ<", Self::container_templ_path(), single_ident_generic_path_to_ident(&p_arg.path).unwrap()).unwrap();
- assert_eq!(p_arg.path.segments.len(), 1);
- if let syn::PathArguments::AngleBracketed(args) = &p_arg.path.segments.iter().next().unwrap().arguments {
- self.write_template_generics(w, &mut args.args.iter().map(|gen|
- if let syn::GenericArgument::Type(t) = gen { t } else { unimplemented!() }),
- generics, is_ref, in_crate);
- } else { unimplemented!(); }
- write!(w, ">").unwrap();
- } else if resolved_generic == "Option" {
- if let syn::PathArguments::AngleBracketed(args) = &p_arg.path.segments.iter().next().unwrap().arguments {
- self.write_template_generics(w, &mut args.args.iter().map(|gen|
- if let syn::GenericArgument::Type(t) = gen { t } else { unimplemented!() }),
- generics, is_ref, in_crate);
- } else { unimplemented!(); }
- } else if in_crate {
- write!(w, "{}", c_type).unwrap();
- } else {
- self.write_rust_type(w, generics, &t);
- }
- } else {
- // If we just write out resolved_generic, it may mostly work, however for
- // original types which are generic, we need the template args. We could
- // figure them out and write them out, too, but its much easier to just
- // reference the native{} type alias which exists at least for opaque types.
- if in_crate {
- write!(w, "crate::{}", resolved_generic).unwrap();
- } else {
- let path_name: Vec<&str> = resolved_generic.rsplitn(2, "::").collect();
- if path_name.len() > 1 {
- write!(w, "crate::{}::native{}", path_name[1], path_name[0]).unwrap();
- } else {
- write!(w, "crate::native{}", path_name[0]).unwrap();
- }
- }
- }
- } else if let syn::Type::Reference(r_arg) = t {
+ if let syn::Type::Reference(r_arg) = t {
+ if !self.write_c_type_intern(w, &*r_arg.elem, generics, false, false, false) { return false; }
+
+ // While write_c_type_intern, above is correct, we don't want to blindly convert a
+ // reference to something stupid, so check that the container is either opaque or a
+ // predefined type (currently only Transaction).
if let syn::Type::Path(p_arg) = &*r_arg.elem {
let resolved = self.resolve_path(&p_arg.path, generics);
- if self.crate_types.opaques.get(&resolved).is_some() {
- write!(w, "crate::{}", resolved).unwrap();
- } else {
- let cty = self.c_type_from_path(&resolved, true, true).expect("Template generics should be opaque or have a predefined mapping");
- w.write(cty.as_bytes()).unwrap();
- }
+ assert!(self.crate_types.opaques.get(&resolved).is_some() ||
+ self.c_type_from_path(&resolved, true, true).is_some(), "Template generics should be opaque or have a predefined mapping");
} else { unimplemented!(); }
- } else if let syn::Type::Array(a_arg) = t {
- if let syn::Type::Path(p_arg) = &*a_arg.elem {
- let resolved = self.resolve_path(&p_arg.path, generics);
- assert!(self.is_primitive(&resolved));
- if let syn::Expr::Lit(syn::ExprLit { lit: syn::Lit::Int(len), .. }) = &a_arg.len {
- write!(w, "{}",
- self.c_type_from_path(&format!("[{}; {}]", resolved, len.base10_digits()), is_ref, false).unwrap()).unwrap();
- }
- }
+ } else {
+ if !self.write_c_type_intern(w, t, generics, false, false, false) { return false; }
}
}
+ true
}
fn check_create_container(&mut self, mangled_container: String, container_type: &str, args: Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) -> bool {
if !self.crate_types.templates_defined.get(&mangled_container).is_some() {
let mut created_container: Vec<u8> = Vec::new();
- write!(&mut created_container, "pub type {} = ", mangled_container).unwrap();
- write!(&mut created_container, "{}::C{}Templ<", Self::container_templ_path(), container_type).unwrap();
- self.write_template_generics(&mut created_container, &mut args.iter().map(|t| *t), generics, is_ref, true);
- writeln!(&mut created_container, ">;").unwrap();
+ if container_type == "Result" {
+ let mut a_ty: Vec<u8> = Vec::new();
+ if let syn::Type::Tuple(tup) = args.iter().next().unwrap() {
+ if tup.elems.is_empty() {
+ write!(&mut a_ty, "()").unwrap();
+ } else {
+ if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref) { return false; }
+ }
+ } else {
+ if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t).take(1), generics, is_ref) { return false; }
+ }
- write!(&mut created_container, "#[no_mangle]\npub static {}_free: extern \"C\" fn({}) = ", mangled_container, mangled_container).unwrap();
- write!(&mut created_container, "{}::C{}Templ_free::<", Self::container_templ_path(), container_type).unwrap();
- self.write_template_generics(&mut created_container, &mut args.iter().map(|t| *t), generics, is_ref, true);
- writeln!(&mut created_container, ">;").unwrap();
+ let mut b_ty: Vec<u8> = Vec::new();
+ if let syn::Type::Tuple(tup) = args.iter().skip(1).next().unwrap() {
+ if tup.elems.is_empty() {
+ write!(&mut b_ty, "()").unwrap();
+ } else {
+ if !self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref) { return false; }
+ }
+ } else {
+ if !self.write_template_generics(&mut b_ty, &mut args.iter().map(|t| *t).skip(1), generics, is_ref) { return false; }
+ }
- if !self.write_template_constructor(&mut created_container, container_type, &mangled_container, &args, generics, is_ref) {
- return false;
+ let ok_str = String::from_utf8(a_ty).unwrap();
+ let err_str = String::from_utf8(b_ty).unwrap();
+ let is_clonable = self.is_clonable(&ok_str) && self.is_clonable(&err_str);
+ write_result_block(&mut created_container, &mangled_container, &ok_str, &err_str, is_clonable);
+ if is_clonable {
+ self.crate_types.clonable_types.insert(Self::generated_container_path().to_owned() + "::" + &mangled_container);
+ }
+ } else if container_type == "Vec" {
+ let mut a_ty: Vec<u8> = Vec::new();
+ if !self.write_template_generics(&mut a_ty, &mut args.iter().map(|t| *t), generics, is_ref) { return false; }
+ let ty = String::from_utf8(a_ty).unwrap();
+ let is_clonable = self.is_clonable(&ty);
+ write_vec_block(&mut created_container, &mangled_container, &ty, is_clonable);
+ if is_clonable {
+ self.crate_types.clonable_types.insert(Self::generated_container_path().to_owned() + "::" + &mangled_container);
+ }
+ } else if container_type.ends_with("Tuple") {
+ let mut tuple_args = Vec::new();
+ let mut is_clonable = true;
+ for arg in args.iter() {
+ let mut ty: Vec<u8> = Vec::new();
+ if !self.write_template_generics(&mut ty, &mut [arg].iter().map(|t| **t), generics, is_ref) { return false; }
+ let ty_str = String::from_utf8(ty).unwrap();
+ if !self.is_clonable(&ty_str) {
+ is_clonable = false;
+ }
+ tuple_args.push(ty_str);
+ }
+ write_tuple_block(&mut created_container, &mangled_container, &tuple_args, is_clonable);
+ if is_clonable {
+ self.crate_types.clonable_types.insert(Self::generated_container_path().to_owned() + "::" + &mangled_container);
+ }
+ } else {
+ unreachable!();
}
self.crate_types.templates_defined.insert(mangled_container.clone(), true);
} else if let syn::Type::Path(p_arg) = arg {
write_path!(p_arg, None);
} else if let syn::Type::Reference(refty) = arg {
- if args.len() != 1 { return false; }
if let syn::Type::Path(p_arg) = &*refty.elem {
write_path!(p_arg, None);
} else if let syn::Type::Slice(_) = &*refty.elem {
// make it a pointer so that its an option. Note that we cannot always convert
// the Vec-as-slice (ie non-ref types) containers, so sometimes need to be able
// to edit it, hence we use *mut here instead of *const.
+ if args.len() != 1 { return false; }
write!(w, "*mut ").unwrap();
self.write_c_type(w, arg, None, true);
} else { return false; }
projects / rust-lightning / blobdiff