olm: Add inital bindgen generated olm-sys bindings.

nio-olm/nio-olm-sys/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "nio-olm-sys"
+version = "3.1.4-beta"
+authors = ["Damir Jelić <poljar@termina.org.uk>"]
+description = "Low level bindings for the Olm C library"
+license = "ISC"
+edition = "2018"
+build = "build.rs"
+
+[build-dependencies]
+bindgen = "0.51.1"
+
+[dependencies]
+libc = "0.2.65"

nio-olm/nio-olm-sys/build.rs

@@ -0,0 +1,21 @@
+use bindgen::Bindings;
+use std::env;
+use std::path::PathBuf;
+
+fn build(file: &str) -> Result<Bindings, ()> {
+    println!("cargo:rustc-link-lib=olm");
+
+    bindgen::Builder::default()
+        .rustfmt_bindings(true)
+        .header(file)
+        .generate()
+}
+
+fn main() {
+    let bindings = build("src/wrapper.h").expect("Unable to build bindings");
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
+}

nio-olm/nio-olm-sys/src/lib.rs

@@ -0,0 +1,5 @@
+#![allow(non_upper_case_globals)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));

nio-olm/nio-olm-sys/src/wrapper.h

@@ -0,0 +1 @@
+#include <olm/olm.h>