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|
use proc_macro2::Span;
use quote::{format_ident, quote};
use std::{path::PathBuf, str::FromStr};
use syn::{
parse_quote, punctuated::Punctuated, visit_mut::VisitMut, Abi, Item, ItemUse, LitStr, UseTree,
};
fn main() {
let crate_root = PathBuf::from_str(env!("CARGO_MANIFEST_DIR")).unwrap();
let cuda_header = bindgen::Builder::default()
.use_core()
.header_contents("cuda_wrapper.h", include_str!("../build/cuda_wrapper.h"))
.no_partialeq("CUDA_HOST_NODE_PARAMS_st")
.derive_eq(true)
.allowlist_type("^CU.*")
.allowlist_function("^cu.*")
.allowlist_var("^CU.*")
.default_enum_style(bindgen::EnumVariation::NewType {
is_bitfield: false,
is_global: false,
})
.layout_tests(false)
.new_type_alias(r"^CUdevice_v\d+$")
.new_type_alias(r"^CUdeviceptr_v\d+$")
.must_use_type("cudaError_enum")
.constified_enum("cudaError_enum")
.clang_args(["-I/usr/local/cuda/include"])
.generate()
.unwrap()
.to_string();
generate_types(
crate_root,
&["..", "cuda_types", "src", "lib.rs"],
cuda_header,
);
}
fn generate_types(mut output: PathBuf, path: &[&str], cuda_header: String) {
let mut module: syn::File = syn::parse_str(&cuda_header).unwrap();
module.attrs.push(parse_quote! {
#![allow(warnings)]
});
let mut converter = ConvertIntoRustResult {
type_: "CUresult",
underlying_type: "cudaError_enum",
new_error_type: "CUerror",
error_prefix: ("CUDA_ERROR", "ERROR"),
success: ("CUDA_SUCCESS", "SUCCESS"),
constants: Vec::new(),
};
module.items = module
.items
.into_iter()
.filter_map(|item| match item {
Item::ForeignMod(_) => None,
Item::Const(const_) => converter.get_const(const_).map(Item::Const),
Item::Use(use_) => converter.get_use(use_).map(Item::Use),
item => Some(item),
})
.collect::<Vec<_>>();
converter.flush(&mut module.items);
syn::visit_mut::visit_file_mut(&mut FixAbi, &mut module);
for segment in path {
output.push(segment);
}
std::fs::write(output, prettyplease::unparse(&module)).unwrap();
}
struct ConvertIntoRustResult {
type_: &'static str,
underlying_type: &'static str,
new_error_type: &'static str,
error_prefix: (&'static str, &'static str),
success: (&'static str, &'static str),
constants: Vec<syn::ItemConst>,
}
impl ConvertIntoRustResult {
fn get_const(&mut self, const_: syn::ItemConst) -> Option<syn::ItemConst> {
let name = const_.ident.to_string();
if name.starts_with(self.underlying_type) {
self.constants.push(const_);
None
} else {
Some(const_)
}
}
fn get_use(&mut self, use_: ItemUse) -> Option<ItemUse> {
if let UseTree::Path(ref path) = use_.tree {
if let UseTree::Rename(ref rename) = &*path.tree {
if rename.rename == self.type_ {
return None;
}
}
}
Some(use_)
}
fn flush(self, items: &mut Vec<Item>) {
let type_ = format_ident!("{}", self.type_);
let type_trait = format_ident!("{}Consts", self.type_);
let new_error_type = format_ident!("{}", self.new_error_type);
let success = format_ident!("{}", self.success.1);
let mut result_variants = Vec::new();
let mut error_variants = Vec::new();
for const_ in self.constants.iter() {
let ident = const_.ident.to_string();
if ident.ends_with(self.success.0) {
result_variants.push(quote! {
const #success: #type_ = #type_::Ok(());
});
} else {
let old_prefix_len = self.underlying_type.len() + 1 + self.error_prefix.0.len() + 1;
let variant_ident =
format_ident!("{}_{}", self.error_prefix.1, &ident[old_prefix_len..]);
let error_ident = format_ident!("{}", &ident[old_prefix_len..]);
let expr = &const_.expr;
result_variants.push(quote! {
const #variant_ident: #type_ = #type_::Err(#new_error_type::#error_ident);
});
error_variants.push(quote! {
pub const #error_ident: #new_error_type = #new_error_type(unsafe { ::core::num::NonZeroU32::new_unchecked(#expr) });
});
}
}
let extra_items: Punctuated<syn::Item, syn::parse::Nothing> = parse_quote! {
impl #new_error_type {
#(#error_variants)*
}
#[repr(transparent)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub struct #new_error_type(pub ::core::num::NonZeroU32);
pub trait #type_trait {
#(#result_variants)*
}
impl #type_trait for #type_ {}
#[must_use]
pub type #type_ = ::core::result::Result<(), #new_error_type>;
const _: fn() = || {
let _ = std::mem::transmute::<#type_, u32>;
};
};
items.extend(extra_items);
}
}
struct FixAbi;
impl VisitMut for FixAbi {
fn visit_abi_mut(&mut self, i: &mut Abi) {
if let Some(ref mut name) = i.name {
*name = LitStr::new("system", Span::call_site());
}
}
}
|
