Add auto-generation of Mun ABI for Rust

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "crates/mun_abi/c"]
+	path = crates/mun_abi/c
+	url = ../abi-c

Cargo.toml

@@ -1,5 +1,6 @@
 [workspace]
 members = [
+    "crates\\mun_abi",
     "crates\\mun_runtime",
     "crates\\mun_symbols",
 ]

crates/mun_abi/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "mun_abi"
+version = "0.1.0"
+authors = ["Wodann <[email protected]>"]
+edition = "2018"
+
+[build-dependencies]
+bindgen = "0.51"

crates/mun_abi/build.rs

@@ -0,0 +1,48 @@
+use std::env;
+use std::path::PathBuf;
+
+use bindgen::{self, callbacks::EnumVariantValue, callbacks::ParseCallbacks};
+
+#[derive(Debug)]
+struct RemoveVendorName;
+
+impl ParseCallbacks for RemoveVendorName {
+    fn enum_variant_name(
+        &self,
+        enum_name: Option<&str>,
+        original_variant_name: &str,
+        _variant_value: EnumVariantValue,
+    ) -> Option<String> {
+        Some(
+            original_variant_name
+                .trim_start_matches(enum_name.unwrap_or(""))
+                .to_string(),
+        )
+    }
+
+    fn item_name(&self, original_item_name: &str) -> Option<String> {
+        if original_item_name == "MunPrivacy_t" {
+            Some("Privacy".to_string())
+        } else {
+            Some(original_item_name.trim_start_matches("Mun").to_string())
+        }
+    }
+}
+
+fn main() {
+    let bindings = bindgen::Builder::default()
+        .header("c/include/mun_abi.h")
+        .whitelist_type("Mun.*")
+        .blacklist_type("MunPrivacy.*")
+        .parse_callbacks(Box::new(RemoveVendorName))
+        .generate()
+        .expect("Unable to generate bindings for 'mun_abi.h'");
+
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect(&format!(
+            "Couldn't write bindings to '{}'",
+            out_path.as_path().to_string_lossy()
+        ));
+}

crates/mun_abi/src/lib.rs

@@ -0,0 +1,7 @@
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+
+#[repr(u8)]
+pub enum Privacy {
+    Public = 0,
+    Private = 1,
+}