X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=c-bindings-gen%2Fsrc%2Fmain.rs;h=8d158e2f4816ae2997ad4aa6be404d45ef7f76c2;hb=edf9c17157cacd2a213be288922f957a5cc2d892;hp=c197839c9249a3443396ff90159280f4c5a4857f;hpb=88424ca6dafb29e4312953108bc48d6e5dbbeca1;p=rust-lightning diff --git a/c-bindings-gen/src/main.rs b/c-bindings-gen/src/main.rs index c197839c9..8d158e2f4 100644 --- a/c-bindings-gen/src/main.rs +++ b/c-bindings-gen/src/main.rs @@ -38,7 +38,7 @@ fn convert_macro(w: &mut W, macro_path: &syn::Path, stream: & if let Some(s) = types.maybe_resolve_ident(&struct_for) { if !types.crate_types.opaques.get(&s).is_some() { return; } writeln!(w, "#[no_mangle]").unwrap(); - writeln!(w, "pub extern \"C\" fn {}_write(obj: *const {}) -> crate::c_types::derived::CVec_u8Z {{", struct_for, struct_for).unwrap(); + writeln!(w, "pub extern \"C\" fn {}_write(obj: &{}) -> crate::c_types::derived::CVec_u8Z {{", struct_for, struct_for).unwrap(); writeln!(w, "\tcrate::c_types::serialize_obj(unsafe {{ &(*(*obj).inner) }})").unwrap(); writeln!(w, "}}").unwrap(); writeln!(w, "#[no_mangle]").unwrap(); @@ -59,22 +59,22 @@ fn convert_macro(w: &mut W, macro_path: &syn::Path, stream: & } /// Convert "impl trait_path for for_ty { .. }" for manually-mapped types (ie (de)serialization) -fn maybe_convert_trait_impl(w: &mut W, trait_path: &syn::Path, for_ty: &syn::Type, types: &mut TypeResolver) { - if let Some(t) = types.maybe_resolve_path(&trait_path, None) { +fn maybe_convert_trait_impl(w: &mut W, trait_path: &syn::Path, for_ty: &syn::Type, types: &mut TypeResolver, generics: &GenericTypes) { + if let Some(t) = types.maybe_resolve_path(&trait_path, Some(generics)) { let for_obj; let full_obj_path; let mut has_inner = false; if let syn::Type::Path(ref p) = for_ty { - if let Some(ident) = p.path.get_ident() { + if let Some(ident) = single_ident_generic_path_to_ident(&p.path) { for_obj = format!("{}", ident); full_obj_path = for_obj.clone(); - has_inner = types.c_type_has_inner_from_path(&types.resolve_path(&p.path, None)); + has_inner = types.c_type_has_inner_from_path(&types.resolve_path(&p.path, Some(generics))); } else { return; } } else { // We assume that anything that isn't a Path is somehow a generic that ends up in our // derived-types module. let mut for_obj_vec = Vec::new(); - types.write_c_type(&mut for_obj_vec, for_ty, None, false); + types.write_c_type(&mut for_obj_vec, for_ty, Some(generics), false); full_obj_path = String::from_utf8(for_obj_vec).unwrap(); assert!(full_obj_path.starts_with(TypeResolver::generated_container_path())); for_obj = full_obj_path[TypeResolver::generated_container_path().len() + 2..].into(); @@ -83,17 +83,17 @@ fn maybe_convert_trait_impl(w: &mut W, trait_path: &syn::Path match &t as &str { "util::ser::Writeable" => { writeln!(w, "#[no_mangle]").unwrap(); - writeln!(w, "pub extern \"C\" fn {}_write(obj: *const {}) -> crate::c_types::derived::CVec_u8Z {{", for_obj, full_obj_path).unwrap(); + writeln!(w, "pub extern \"C\" fn {}_write(obj: &{}) -> crate::c_types::derived::CVec_u8Z {{", for_obj, full_obj_path).unwrap(); let ref_type = syn::Type::Reference(syn::TypeReference { and_token: syn::Token!(&)(Span::call_site()), lifetime: None, mutability: None, elem: Box::new(for_ty.clone()) }); - assert!(!types.write_from_c_conversion_new_var(w, &syn::Ident::new("obj", Span::call_site()), &ref_type, None)); + assert!(!types.write_from_c_conversion_new_var(w, &syn::Ident::new("obj", Span::call_site()), &ref_type, Some(generics))); write!(w, "\tcrate::c_types::serialize_obj(").unwrap(); - types.write_from_c_conversion_prefix(w, &ref_type, None); + types.write_from_c_conversion_prefix(w, &ref_type, Some(generics)); write!(w, "unsafe {{ &*obj }}").unwrap(); - types.write_from_c_conversion_suffix(w, &ref_type, None); + types.write_from_c_conversion_suffix(w, &ref_type, Some(generics)); writeln!(w, ")").unwrap(); writeln!(w, "}}").unwrap(); @@ -104,7 +104,7 @@ fn maybe_convert_trait_impl(w: &mut W, trait_path: &syn::Path writeln!(w, "}}").unwrap(); } }, - "util::ser::Readable" => { + "util::ser::Readable"|"util::ser::ReadableArgs" => { // Create the Result syn::Type let mut err_segs = syn::punctuated::Punctuated::new(); err_segs.push(syn::PathSegment { ident: syn::Ident::new("ln", Span::call_site()), arguments: syn::PathArguments::None }); @@ -128,17 +128,48 @@ fn maybe_convert_trait_impl(w: &mut W, trait_path: &syn::Path leading_colon: None, segments: res_segs } }); writeln!(w, "#[no_mangle]").unwrap(); - write!(w, "pub extern \"C\" fn {}_read(ser: crate::c_types::u8slice) -> ", for_obj).unwrap(); - types.write_c_type(w, &res_ty, None, false); + write!(w, "pub extern \"C\" fn {}_read(ser: crate::c_types::u8slice", for_obj).unwrap(); + + let mut arg_conv = Vec::new(); + if t == "util::ser::ReadableArgs" { + write!(w, ", arg: ").unwrap(); + assert!(trait_path.leading_colon.is_none()); + let args_seg = trait_path.segments.iter().last().unwrap(); + assert_eq!(format!("{}", args_seg.ident), "ReadableArgs"); + if let syn::PathArguments::AngleBracketed(args) = &args_seg.arguments { + assert_eq!(args.args.len(), 1); + if let syn::GenericArgument::Type(args_ty) = args.args.iter().next().unwrap() { + types.write_c_type(w, args_ty, Some(generics), false); + + assert!(!types.write_from_c_conversion_new_var(&mut arg_conv, &syn::Ident::new("arg", Span::call_site()), &args_ty, Some(generics))); + + write!(&mut arg_conv, "\tlet arg_conv = ").unwrap(); + types.write_from_c_conversion_prefix(&mut arg_conv, &args_ty, Some(generics)); + write!(&mut arg_conv, "arg").unwrap(); + types.write_from_c_conversion_suffix(&mut arg_conv, &args_ty, Some(generics)); + } else { unreachable!(); } + } else { unreachable!(); } + } + write!(w, ") -> ").unwrap(); + types.write_c_type(w, &res_ty, Some(generics), false); writeln!(w, " {{").unwrap(); - writeln!(w, "\tlet res = crate::c_types::deserialize_obj(ser);").unwrap(); + + if t == "util::ser::ReadableArgs" { + w.write(&arg_conv).unwrap(); + write!(w, ";\n\tlet res: ").unwrap(); + // At least in one case we need type annotations here, so provide them. + types.write_rust_type(w, Some(generics), &res_ty); + writeln!(w, " = crate::c_types::deserialize_obj_arg(ser, arg_conv);").unwrap(); + } else { + writeln!(w, "\tlet res = crate::c_types::deserialize_obj(ser);").unwrap(); + } write!(w, "\t").unwrap(); - if types.write_to_c_conversion_new_var(w, &syn::Ident::new("res", Span::call_site()), &res_ty, None, false) { + if types.write_to_c_conversion_new_var(w, &syn::Ident::new("res", Span::call_site()), &res_ty, Some(generics), false) { write!(w, "\n\t").unwrap(); } - types.write_to_c_conversion_inline_prefix(w, &res_ty, None, false); + types.write_to_c_conversion_inline_prefix(w, &res_ty, Some(generics), false); write!(w, "res").unwrap(); - types.write_to_c_conversion_inline_suffix(w, &res_ty, None, false); + types.write_to_c_conversion_inline_suffix(w, &res_ty, Some(generics), false); writeln!(w, "\n}}").unwrap(); }, _ => {}, @@ -675,6 +706,35 @@ fn writeln_struct<'a, 'b, W: std::io::Write>(w: &mut W, s: &'a syn::ItemStruct, /// /// A few non-crate Traits are hard-coded including Default. fn writeln_impl(w: &mut W, i: &syn::ItemImpl, types: &mut TypeResolver) { + match export_status(&i.attrs) { + ExportStatus::Export => {}, + ExportStatus::NoExport|ExportStatus::TestOnly => return, + } + + if let syn::Type::Tuple(_) = &*i.self_ty { + if types.understood_c_type(&*i.self_ty, None) { + let mut gen_types = GenericTypes::new(); + if !gen_types.learn_generics(&i.generics, types) { + eprintln!("Not implementing anything for impl tuple due to not understood generics"); + return; + } + + if i.defaultness.is_some() || i.unsafety.is_some() { unimplemented!(); } + if let Some(trait_path) = i.trait_.as_ref() { + if trait_path.0.is_some() { unimplemented!(); } + if types.understood_c_path(&trait_path.1) { + eprintln!("Not implementing anything for impl Trait for Tuple - we only support manual defines"); + return; + } else { + // Just do a manual implementation: + maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types); + } + } else { + eprintln!("Not implementing anything for plain impl tuple block - we only support impl Trait for Tuples"); + return; + } + } + } if let &syn::Type::Path(ref p) = &*i.self_ty { if p.qself.is_some() { unimplemented!(); } if let Some(ident) = single_ident_generic_path_to_ident(&p.path) { @@ -730,7 +790,7 @@ fn writeln_impl(w: &mut W, i: &syn::ItemImpl, types: &mut Typ writeln!(w, "\t\tret.free = Some({}_free_void);", ident).unwrap(); writeln!(w, "\t\tret\n\t}}\n}}").unwrap(); - write!(w, "#[no_mangle]\npub extern \"C\" fn {}_as_{}(this_arg: *const {}) -> crate::{} {{\n", ident, trait_obj.ident, ident, full_trait_path).unwrap(); + write!(w, "#[no_mangle]\npub extern \"C\" fn {}_as_{}(this_arg: &{}) -> crate::{} {{\n", ident, trait_obj.ident, ident, full_trait_path).unwrap(); writeln!(w, "\tcrate::{} {{", full_trait_path).unwrap(); writeln!(w, "\t\tthis_arg: unsafe {{ (*this_arg).inner as *mut c_void }},").unwrap(); writeln!(w, "\t\tfree: None,").unwrap(); @@ -896,12 +956,11 @@ fn writeln_impl(w: &mut W, i: &syn::ItemImpl, types: &mut Typ }, "PartialEq" => {}, // If we have no generics, try a manual implementation: - _ if p.path.get_ident().is_some() => maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types), - _ => {}, + _ => maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types), } - } else if p.path.get_ident().is_some() { + } else { // If we have no generics, try a manual implementation: - maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types); + maybe_convert_trait_impl(w, &trait_path.1, &*i.self_ty, types, &gen_types); } } else { let declared_type = (*types.get_declared_type(&ident).unwrap()).clone(); @@ -1496,10 +1555,18 @@ fn main() { let mut cpp_header_file = std::fs::OpenOptions::new().write(true).create(true).truncate(true) .open(&args[6]).expect("Unable to open new header file"); - writeln!(header_file, "#if defined(__GNUC__)\n#define MUST_USE_STRUCT __attribute__((warn_unused))").unwrap(); - writeln!(header_file, "#else\n#define MUST_USE_STRUCT\n#endif").unwrap(); - writeln!(header_file, "#if defined(__GNUC__)\n#define MUST_USE_RES __attribute__((warn_unused_result))").unwrap(); - writeln!(header_file, "#else\n#define MUST_USE_RES\n#endif").unwrap(); + writeln!(header_file, "#if defined(__GNUC__)").unwrap(); + writeln!(header_file, "#define MUST_USE_STRUCT __attribute__((warn_unused))").unwrap(); + writeln!(header_file, "#define MUST_USE_RES __attribute__((warn_unused_result))").unwrap(); + writeln!(header_file, "#else").unwrap(); + writeln!(header_file, "#define MUST_USE_STRUCT").unwrap(); + writeln!(header_file, "#define MUST_USE_RES").unwrap(); + writeln!(header_file, "#endif").unwrap(); + writeln!(header_file, "#if defined(__clang__)").unwrap(); + writeln!(header_file, "#define NONNULL_PTR _Nonnull").unwrap(); + writeln!(header_file, "#else").unwrap(); + writeln!(header_file, "#define NONNULL_PTR").unwrap(); + writeln!(header_file, "#endif").unwrap(); writeln!(cpp_header_file, "#include \nnamespace LDK {{").unwrap(); // First parse the full crate's ASTs, caching them so that we can hold references to the AST