X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=c-bindings-gen%2Fsrc%2Ftypes.rs;h=22f1d9e5a8596fbbffd9728ecd88d0d5fa86f6ac;hb=f5e0e228fd73f0b44381af28c13ffc2df67608c0;hp=e85729481a39841daf9a6159b3bd51c26e02e818;hpb=78c2c48ea30e5d933c0a29c5a9e4dea47eeabf04;p=rust-lightning diff --git a/c-bindings-gen/src/types.rs b/c-bindings-gen/src/types.rs index e8572948..22f1d9e5 100644 --- a/c-bindings-gen/src/types.rs +++ b/c-bindings-gen/src/types.rs @@ -1,4 +1,4 @@ -use std::collections::HashMap; +use std::collections::{HashMap, HashSet}; use std::fs::File; use std::io::Write; use std::hash; @@ -39,6 +39,30 @@ pub fn single_ident_generic_path_to_ident(p: &syn::Path) -> Option<&syn::Ident> } 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, @@ -293,6 +317,8 @@ pub struct CrateTypes<'a> { /// 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, } /// A struct which tracks resolving rust types into C-mapped equivalents, exists for one specific @@ -368,6 +394,16 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { _ => 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> { @@ -550,7 +586,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { // List of structs we map (possibly during processing of other files): "ln::features::InitFeatures" if is_ref => Some(".inner) }"), - "ln::features::InitFeatures" if !is_ref => Some(".take_ptr()) }"), + "ln::features::InitFeatures" if !is_ref => Some(".take_inner()) }"), // List of traits we map (possibly during processing of other files): "crate::util::logger::Logger" => Some(""), @@ -727,7 +763,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { /// Returns the module path in the generated mapping crate to the containers which we generate /// when writing to CrateTypes::template_file. - fn generated_container_path() -> &'static str { + pub fn generated_container_path() -> &'static str { "crate::c_types::derived" } /// Returns the module path in the generated mapping crate to the container templates, which @@ -798,8 +834,8 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { match full_path { "Result" if !is_ref => { Some(("match ", - vec![(".result_ok { true => Ok(".to_string(), format!("(*unsafe {{ Box::from_raw({}.contents.result.take_ptr()) }})", var_name)), - ("), false => Err(".to_string(), format!("(*unsafe {{ Box::from_raw({}.contents.err.take_ptr()) }})", var_name))], + vec![(".result_ok { true => Ok(".to_string(), format!("(*unsafe {{ Box::from_raw(<*mut _>::take_ptr(&mut {}.contents.result)) }})", var_name)), + ("), false => Err(".to_string(), format!("(*unsafe {{ Box::from_raw(<*mut _>::take_ptr(&mut {}.contents.err)) }})", var_name))], ")}")) }, "Vec"|"Slice" if !is_ref => { @@ -914,7 +950,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { self.declared.get(ident) } /// Returns true if the object at the given path is mapped as X { inner: *mut origX, .. }. - fn c_type_has_inner_from_path(&self, full_path: &str) -> bool{ + pub fn c_type_has_inner_from_path(&self, full_path: &str) -> bool{ self.crate_types.opaques.get(full_path).is_some() } @@ -1061,7 +1097,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { pub fn write_rust_type(&self, w: &mut W, generics: Option<&GenericTypes>, t: &syn::Type) { match t { syn::Type::Path(p) => { - if p.qself.is_some() || p.path.leading_colon.is_some() { + if p.qself.is_some() { unimplemented!(); } self.write_rust_path(w, generics, &p.path); @@ -1410,7 +1446,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { |w, decl_type, _full_path, is_ref, _is_mut| match decl_type { DeclType::StructImported if is_ref && ptr_for_ref => write!(w, ").inner }}").unwrap(), DeclType::StructImported if is_ref => write!(w, ".inner }}").unwrap(), - DeclType::StructImported if !is_ref => write!(w, ".take_ptr()) }}").unwrap(), + DeclType::StructImported if !is_ref => write!(w, ".take_inner()) }}").unwrap(), DeclType::MirroredEnum if is_ref => write!(w, ".to_native()").unwrap(), DeclType::MirroredEnum => write!(w, ".into_native()").unwrap(), DeclType::Trait(_) => {}, @@ -1720,7 +1756,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { // *** C Container Type Equivalent and alias Printing *** // ****************************************************** - fn write_template_constructor(&mut self, w: &mut W, container_type: &str, mangled_container: &str, args: &Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) { + fn write_template_constructor(&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 { @@ -1761,7 +1797,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { 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(); - assert!(self.write_c_type_intern(w, gen, None, false, false, false)); + 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(); @@ -1772,6 +1808,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { } else { writeln!(w, "").unwrap(); } + true } fn write_template_generics<'b, W: std::io::Write>(&self, w: &mut W, args: &mut dyn Iterator, generics: Option<&GenericTypes>, is_ref: bool, in_crate: bool) { @@ -1850,12 +1887,11 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { } } } - fn check_create_container(&mut self, mangled_container: String, container_type: &str, args: Vec<&syn::Type>, generics: Option<&GenericTypes>, is_ref: bool) { + 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() { - self.crate_types.templates_defined.insert(mangled_container.clone(), true); let mut created_container: Vec = Vec::new(); - write!(&mut created_container, "#[no_mangle]\npub type {} = ", mangled_container).unwrap(); + 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(); @@ -1865,10 +1901,14 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { self.write_template_generics(&mut created_container, &mut args.iter().map(|t| *t), generics, is_ref, true); writeln!(&mut created_container, ">;").unwrap(); - self.write_template_constructor(&mut created_container, container_type, &mangled_container, &args, generics, is_ref); + if !self.write_template_constructor(&mut created_container, container_type, &mangled_container, &args, generics, is_ref) { + return false; + } + self.crate_types.templates_defined.insert(mangled_container.clone(), true); self.crate_types.template_file.write(&created_container).unwrap(); } + true } fn path_to_generic_args(path: &syn::Path) -> Vec<&syn::Type> { if let syn::PathArguments::AngleBracketed(args) = &path.segments.iter().next().unwrap().arguments { @@ -1885,45 +1925,46 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { for arg in args.iter() { macro_rules! write_path { ($p_arg: expr, $extra_write: expr) => { - let subtype = self.resolve_path(&$p_arg.path, generics); - if self.is_transparent_container(ident, is_ref) { - // We dont (yet) support primitives or containers inside transparent - // containers, so check for that first: - if self.is_primitive(&subtype) { return false; } - if self.is_known_container(&subtype, is_ref) { return false; } - if !in_type { - if self.c_type_has_inner_from_path(&subtype) { - if !self.write_c_path_intern(w, &$p_arg.path, generics, is_ref, is_mut, ptr_for_ref) { return false; } + if let Some(subtype) = self.maybe_resolve_path(&$p_arg.path, generics) { + if self.is_transparent_container(ident, is_ref) { + // We dont (yet) support primitives or containers inside transparent + // containers, so check for that first: + if self.is_primitive(&subtype) { return false; } + if self.is_known_container(&subtype, is_ref) { return false; } + if !in_type { + if self.c_type_has_inner_from_path(&subtype) { + if !self.write_c_path_intern(w, &$p_arg.path, generics, is_ref, is_mut, ptr_for_ref) { return false; } + } else { + // Option needs to be converted to a *mut T, ie mut ptr-for-ref + if !self.write_c_path_intern(w, &$p_arg.path, generics, true, true, true) { return false; } + } } else { - // Option needs to be converted to a *mut T, ie mut ptr-for-ref - if !self.write_c_path_intern(w, &$p_arg.path, generics, true, true, true) { return false; } + if $p_arg.path.segments.len() == 1 { + write!(w, "{}", $p_arg.path.segments.iter().next().unwrap().ident).unwrap(); + } else { + return false; + } } - } else { - if $p_arg.path.segments.len() == 1 { - write!(w, "{}", $p_arg.path.segments.iter().next().unwrap().ident).unwrap(); - } else { + } else if self.is_known_container(&subtype, is_ref) || self.is_transparent_container(&subtype, is_ref) { + if !self.write_c_mangled_container_path_intern(w, Self::path_to_generic_args(&$p_arg.path), generics, + &subtype, is_ref, is_mut, ptr_for_ref, true) { return false; } - } - } else if self.is_known_container(&subtype, is_ref) || self.is_transparent_container(&subtype, is_ref) { - if !self.write_c_mangled_container_path_intern(w, Self::path_to_generic_args(&$p_arg.path), generics, - &subtype, is_ref, is_mut, ptr_for_ref, true) { - return false; - } - self.write_c_mangled_container_path_intern(&mut mangled_type, Self::path_to_generic_args(&$p_arg.path), - generics, &subtype, is_ref, is_mut, ptr_for_ref, true); - if let Some(w2) = $extra_write as Option<&mut Vec> { - self.write_c_mangled_container_path_intern(w2, Self::path_to_generic_args(&$p_arg.path), + self.write_c_mangled_container_path_intern(&mut mangled_type, Self::path_to_generic_args(&$p_arg.path), generics, &subtype, is_ref, is_mut, ptr_for_ref, true); + if let Some(w2) = $extra_write as Option<&mut Vec> { + self.write_c_mangled_container_path_intern(w2, Self::path_to_generic_args(&$p_arg.path), + generics, &subtype, is_ref, is_mut, ptr_for_ref, true); + } + } else { + let id = &&$p_arg.path.segments.iter().rev().next().unwrap().ident; + write!(w, "{}", id).unwrap(); + write!(mangled_type, "{}", id).unwrap(); + if let Some(w2) = $extra_write as Option<&mut Vec> { + write!(w2, "{}", id).unwrap(); + } } - } else { - let id = &&$p_arg.path.segments.iter().rev().next().unwrap().ident; - write!(w, "{}", id).unwrap(); - write!(mangled_type, "{}", id).unwrap(); - if let Some(w2) = $extra_write as Option<&mut Vec> { - write!(w2, "{}", id).unwrap(); - } - } + } else { return false; } } } if let syn::Type::Tuple(tuple) = arg { @@ -1952,8 +1993,10 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { write!(w, "Z").unwrap(); write!(mangled_type, "Z").unwrap(); write!(mangled_tuple_type, "Z").unwrap(); - self.check_create_container(String::from_utf8(mangled_tuple_type).unwrap(), - &format!("{}Tuple", tuple.elems.len()), tuple.elems.iter().collect(), generics, is_ref); + if !self.check_create_container(String::from_utf8(mangled_tuple_type).unwrap(), + &format!("{}Tuple", tuple.elems.len()), tuple.elems.iter().collect(), generics, is_ref) { + return false; + } } } else if let syn::Type::Path(p_arg) = arg { write_path!(p_arg, None); @@ -1987,8 +2030,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { write!(mangled_type, "Z").unwrap(); // Make sure the type is actually defined: - self.check_create_container(String::from_utf8(mangled_type).unwrap(), ident, args, generics, is_ref); - true + self.check_create_container(String::from_utf8(mangled_type).unwrap(), ident, args, generics, is_ref) } fn write_c_mangled_container_path(&mut self, w: &mut W, args: Vec<&syn::Type>, generics: Option<&GenericTypes>, ident: &str, is_ref: bool, is_mut: bool, ptr_for_ref: bool) -> bool { if !self.is_transparent_container(ident, is_ref) { @@ -2098,8 +2140,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> { format!("CVec_{}Z", id) } else { return false; }; write!(w, "{}::{}", Self::generated_container_path(), mangled_container).unwrap(); - self.check_create_container(mangled_container, "Vec", vec![&*r.elem], generics, false); - true + self.check_create_container(mangled_container, "Vec", vec![&*r.elem], generics, false) } else { false } } else if let syn::Type::Tuple(_) = &*s.elem { let mut args = syn::punctuated::Punctuated::new();