X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=c-bindings-gen%2Fsrc%2Fmain.rs;h=97f44a4c4c458e22ce017c0b8c53d8524077cea2;hb=76eed6fb43c1d675195aff896efb325828c76498;hp=1bcc8f19731f435fb5e91a8e57625d4adff3f759;hpb=6728a81b78cec348a99084e841b055424425e27a;p=ldk-c-bindings diff --git a/c-bindings-gen/src/main.rs b/c-bindings-gen/src/main.rs index 1bcc8f1..97f44a4 100644 --- a/c-bindings-gen/src/main.rs +++ b/c-bindings-gen/src/main.rs @@ -33,7 +33,15 @@ mod blocks; use types::*; use blocks::*; -const DEFAULT_IMPORTS: &'static str = "\nuse std::str::FromStr;\nuse std::ffi::c_void;\nuse core::convert::Infallible;\nuse bitcoin::hashes::Hash;\nuse crate::c_types::*;\n"; +const DEFAULT_IMPORTS: &'static str = " +use alloc::str::FromStr; +use core::ffi::c_void; +use core::convert::Infallible; +use bitcoin::hashes::Hash; +use crate::c_types::*; +#[cfg(feature=\"no-std\")] +use alloc::{vec::Vec, boxed::Box}; +"; // ************************************* // *** Manually-expanded conversions *** @@ -84,9 +92,9 @@ fn maybe_convert_trait_impl(w: &mut W, trait_path: &syn::Path writeln!(w, "}}").unwrap(); } }, - "lightning::util::ser::Readable"|"lightning::util::ser::ReadableArgs" => { + "lightning::util::ser::Readable"|"lightning::util::ser::ReadableArgs"|"lightning::util::ser::MaybeReadable" => { // Create the Result syn::Type - let res_ty: syn::Type = parse_quote!(Result<#for_ty, ::ln::msgs::DecodeError>); + let mut res_ty: syn::Type = parse_quote!(Result<#for_ty, ::ln::msgs::DecodeError>); writeln!(w, "#[no_mangle]").unwrap(); writeln!(w, "/// Read a {} from a byte array, created by {}_write", for_obj, for_obj).unwrap(); @@ -111,6 +119,8 @@ fn maybe_convert_trait_impl(w: &mut W, trait_path: &syn::Path types.write_from_c_conversion_suffix(&mut arg_conv, &args_ty, Some(generics)); } else { unreachable!(); } } else { unreachable!(); } + } else if t == "lightning::util::ser::MaybeReadable" { + res_ty = parse_quote!(Result, ::ln::msgs::DecodeError>); } write!(w, ") -> ").unwrap(); types.write_c_type(w, &res_ty, Some(generics), false); @@ -118,12 +128,19 @@ fn maybe_convert_trait_impl(w: &mut W, trait_path: &syn::Path if t == "lightning::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); + write!(w, ";\n").unwrap(); + } + + write!(w, "\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); + + if t == "lightning::util::ser::ReadableArgs" { writeln!(w, " = crate::c_types::deserialize_obj_arg(ser, arg_conv);").unwrap(); + } else if t == "lightning::util::ser::MaybeReadable" { + writeln!(w, " = crate::c_types::maybe_deserialize_obj(ser);").unwrap(); } else { - writeln!(w, "\tlet res = crate::c_types::deserialize_obj(ser);").unwrap(); + writeln!(w, " = crate::c_types::deserialize_obj(ser);").unwrap(); } write!(w, "\t").unwrap(); if types.write_to_c_conversion_new_var(w, &format_ident!("res"), &res_ty, Some(generics), false) { @@ -166,7 +183,7 @@ fn do_write_impl_trait(w: &mut W, trait_path: &str, _trait_na match trait_path { "lightning::util::ser::Writeable" => { writeln!(w, "impl {} for {} {{", trait_path, for_obj).unwrap(); - writeln!(w, "\tfn write(&self, w: &mut W) -> Result<(), ::std::io::Error> {{").unwrap(); + writeln!(w, "\tfn write(&self, w: &mut W) -> Result<(), crate::c_types::io::Error> {{").unwrap(); writeln!(w, "\t\tlet vec = (self.write)(self.this_arg);").unwrap(); writeln!(w, "\t\tw.write_all(vec.as_slice())").unwrap(); writeln!(w, "\t}}\n}}").unwrap(); @@ -482,13 +499,18 @@ fn writeln_trait<'a, 'b, W: std::io::Write>(w: &mut W, t: &'a syn::ItemTrait, ty &syn::TraitItem::Type(ref t) => { if t.default.is_some() || t.generics.lt_token.is_some() { unimplemented!(); } let mut bounds_iter = t.bounds.iter(); - match bounds_iter.next().unwrap() { - syn::TypeParamBound::Trait(tr) => { - writeln!(w, "\ttype {} = crate::{};", t.ident, $type_resolver.resolve_path(&tr.path, Some(&gen_types))).unwrap(); - }, - _ => unimplemented!(), + loop { + match bounds_iter.next().unwrap() { + syn::TypeParamBound::Trait(tr) => { + writeln!(w, "\ttype {} = crate::{};", t.ident, $type_resolver.resolve_path(&tr.path, Some(&gen_types))).unwrap(); + for bound in bounds_iter { + if let syn::TypeParamBound::Trait(_) = bound { unimplemented!(); } + } + break; + }, + syn::TypeParamBound::Lifetime(_) => {}, + } } - if bounds_iter.next().is_some() { unimplemented!(); } }, _ => unimplemented!(), } @@ -516,13 +538,13 @@ fn writeln_trait<'a, 'b, W: std::io::Write>(w: &mut W, t: &'a syn::ItemTrait, ty // Implement supertraits for the C-mapped struct. walk_supertraits!(t, Some(&types), ( ("std::cmp::Eq", _)|("core::cmp::Eq", _) => { - writeln!(w, "impl std::cmp::Eq for {} {{}}", trait_name).unwrap(); - writeln!(w, "impl std::cmp::PartialEq for {} {{", trait_name).unwrap(); + writeln!(w, "impl core::cmp::Eq for {} {{}}", trait_name).unwrap(); + writeln!(w, "impl core::cmp::PartialEq for {} {{", trait_name).unwrap(); writeln!(w, "\tfn eq(&self, o: &Self) -> bool {{ (self.eq)(self.this_arg, o) }}\n}}").unwrap(); }, ("std::hash::Hash", _)|("core::hash::Hash", _) => { - writeln!(w, "impl std::hash::Hash for {} {{", trait_name).unwrap(); - writeln!(w, "\tfn hash(&self, hasher: &mut H) {{ hasher.write_u64((self.hash)(self.this_arg)) }}\n}}").unwrap(); + writeln!(w, "impl core::hash::Hash for {} {{", trait_name).unwrap(); + writeln!(w, "\tfn hash(&self, hasher: &mut H) {{ hasher.write_u64((self.hash)(self.this_arg)) }}\n}}").unwrap(); }, ("Send", _) => {}, ("Sync", _) => {}, ("Clone", _) => { @@ -568,7 +590,7 @@ fn writeln_trait<'a, 'b, W: std::io::Write>(w: &mut W, t: &'a syn::ItemTrait, ty writeln!(w, "}}\n").unwrap(); writeln!(w, "// We're essentially a pointer already, or at least a set of pointers, so allow us to be used").unwrap(); writeln!(w, "// directly as a Deref trait in higher-level structs:").unwrap(); - writeln!(w, "impl std::ops::Deref for {} {{\n\ttype Target = Self;", trait_name).unwrap(); + writeln!(w, "impl core::ops::Deref for {} {{\n\ttype Target = Self;", trait_name).unwrap(); writeln!(w, "\tfn deref(&self) -> &Self {{\n\t\tself\n\t}}\n}}").unwrap(); } @@ -628,7 +650,7 @@ fn writeln_opaque(w: &mut W, ident: &syn::Ident, struct_name: writeln!(w, "\tpub(crate) fn take_inner(mut self) -> *mut native{} {{", struct_name).unwrap(); writeln!(w, "\t\tassert!(self.is_owned);").unwrap(); writeln!(w, "\t\tlet ret = ObjOps::untweak_ptr(self.inner);").unwrap(); - writeln!(w, "\t\tself.inner = std::ptr::null_mut();").unwrap(); + writeln!(w, "\t\tself.inner = core::ptr::null_mut();").unwrap(); writeln!(w, "\t\tret").unwrap(); writeln!(w, "\t}}\n}}").unwrap(); @@ -670,7 +692,7 @@ fn writeln_struct<'a, 'b, W: std::io::Write>(w: &mut W, s: &'a syn::ItemStruct, write!(w, "#[no_mangle]\npub extern \"C\" fn {}_get_{}(this_ptr: &{}) -> ", struct_name, $new_name, struct_name).unwrap(); types.write_c_type(w, &ref_type, Some(&gen_types), true); write!(w, " {{\n\tlet mut inner_val = &mut this_ptr.get_native_mut_ref().{};\n\t", $real_name).unwrap(); - let local_var = types.write_to_c_conversion_new_var(w, &format_ident!("inner_val"), &ref_type, Some(&gen_types), true); + let local_var = types.write_to_c_conversion_from_ownable_ref_new_var(w, &format_ident!("inner_val"), &ref_type, Some(&gen_types)); if local_var { write!(w, "\n\t").unwrap(); } types.write_to_c_conversion_inline_prefix(w, &ref_type, Some(&gen_types), true); write!(w, "inner_val").unwrap(); @@ -909,7 +931,7 @@ fn writeln_impl(w: &mut W, i: &syn::ItemImpl, types: &mut Typ writeln!(w, "\t\tlet mut rust_obj = {} {{ inner: ObjOps::heap_alloc(obj), is_owned: true }};", ident).unwrap(); writeln!(w, "\t\tlet mut ret = {}_as_{}(&rust_obj);", ident, trait_obj.ident).unwrap(); writeln!(w, "\t\t// We want to free rust_obj when ret gets drop()'d, not rust_obj, so wipe rust_obj's pointer and set ret's free() fn").unwrap(); - writeln!(w, "\t\trust_obj.inner = std::ptr::null_mut();").unwrap(); + writeln!(w, "\t\trust_obj.inner = core::ptr::null_mut();").unwrap(); writeln!(w, "\t\tret.free = Some({}_free_void);", ident).unwrap(); writeln!(w, "\t\tret").unwrap(); } @@ -1172,21 +1194,21 @@ fn writeln_impl(w: &mut W, i: &syn::ItemImpl, types: &mut Typ let ref_type: syn::Type = syn::parse_quote!(&#path); assert!(!types.write_to_c_conversion_new_var(w, &format_ident!("a"), &*i.self_ty, Some(&gen_types), false), "We don't support new var conversions when comparing equality"); - writeln!(w, "\t// Note that we'd love to use std::collections::hash_map::DefaultHasher but it's not in core").unwrap(); + writeln!(w, "\t// Note that we'd love to use alloc::collections::hash_map::DefaultHasher but it's not in core").unwrap(); writeln!(w, "\t#[allow(deprecated)]").unwrap(); writeln!(w, "\tlet mut hasher = core::hash::SipHasher::new();").unwrap(); - write!(w, "\tstd::hash::Hash::hash(").unwrap(); + write!(w, "\tcore::hash::Hash::hash(").unwrap(); types.write_from_c_conversion_prefix(w, &ref_type, Some(&gen_types)); write!(w, "o").unwrap(); types.write_from_c_conversion_suffix(w, &ref_type, Some(&gen_types)); writeln!(w, ", &mut hasher);").unwrap(); - writeln!(w, "\tstd::hash::Hasher::finish(&hasher)\n}}").unwrap(); + writeln!(w, "\tcore::hash::Hasher::finish(&hasher)\n}}").unwrap(); } else if (path_matches_nongeneric(&trait_path.1, &["core", "clone", "Clone"]) || path_matches_nongeneric(&trait_path.1, &["Clone"])) && types.c_type_has_inner_from_path(&resolved_path) { writeln!(w, "impl Clone for {} {{", ident).unwrap(); writeln!(w, "\tfn clone(&self) -> Self {{").unwrap(); writeln!(w, "\t\tSelf {{").unwrap(); - writeln!(w, "\t\t\tinner: if <*mut native{}>::is_null(self.inner) {{ std::ptr::null_mut() }} else {{", ident).unwrap(); + writeln!(w, "\t\t\tinner: if <*mut native{}>::is_null(self.inner) {{ core::ptr::null_mut() }} else {{", ident).unwrap(); writeln!(w, "\t\t\t\tObjOps::heap_alloc(unsafe {{ &*ObjOps::untweak_ptr(self.inner) }}.clone()) }},").unwrap(); writeln!(w, "\t\t\tis_owned: true,").unwrap(); writeln!(w, "\t\t}}\n\t}}\n}}").unwrap(); @@ -1625,10 +1647,20 @@ fn writeln_fn<'a, 'b, W: std::io::Write>(w: &mut W, f: &'a syn::ItemFn, types: & writeln_fn_docs(w, &f.attrs, "", types, Some(&gen_types), f.sig.inputs.iter(), &f.sig.output); write!(w, "#[no_mangle]\npub extern \"C\" fn {}(", f.sig.ident).unwrap(); + + write_method_params(w, &f.sig, "", types, Some(&gen_types), false, true); write!(w, " {{\n\t").unwrap(); write_method_var_decl_body(w, &f.sig, "", types, Some(&gen_types), false); - write!(w, "{}::{}(", types.module_path, f.sig.ident).unwrap(); + write!(w, "{}::{}", types.module_path, f.sig.ident).unwrap(); + + let mut function_generic_args = Vec::new(); + maybe_write_generics(&mut function_generic_args, &f.sig.generics, types, true); + if !function_generic_args.is_empty() { + write!(w, "::{}", String::from_utf8(function_generic_args).unwrap()).unwrap(); + } + write!(w, "(").unwrap(); + write_method_call_params(w, &f.sig, "", types, Some(&gen_types), "", false); writeln!(w, "\n}}\n").unwrap(); } @@ -1712,6 +1744,12 @@ fn convert_file<'a, 'b>(libast: &'a FullLibraryAST, crate_types: &CrateTypes<'a> writeln!(out, "#![allow(unused_braces)]").unwrap(); // TODO: We need to map deny(missing_docs) in the source crate(s) //writeln!(out, "#![deny(missing_docs)]").unwrap(); + + writeln!(out, "#![cfg_attr(not(feature = \"std\"), no_std)]").unwrap(); + writeln!(out, "#[cfg(not(any(feature = \"std\", feature = \"no-std\")))]").unwrap(); + writeln!(out, "compile_error!(\"at least one of the `std` or `no-std` features must be enabled\");").unwrap(); + writeln!(out, "extern crate alloc;").unwrap(); + writeln!(out, "pub mod version;").unwrap(); writeln!(out, "pub mod c_types;").unwrap(); writeln!(out, "pub mod bitcoin;").unwrap(); @@ -1958,6 +1996,7 @@ fn main() { let mut derived_templates = std::fs::OpenOptions::new().write(true).create(true).truncate(true) .open(&args[2]).expect("Unable to open new header file"); + writeln!(&mut derived_templates, "{}", DEFAULT_IMPORTS).unwrap(); let mut header_file = std::fs::OpenOptions::new().write(true).create(true).truncate(true) .open(&args[3]).expect("Unable to open new header file"); let mut cpp_header_file = std::fs::OpenOptions::new().write(true).create(true).truncate(true)