pw_rust/examples/bindgen/src/lib.rs

// Copyright 2024 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.

#![no_std]

include!(env!("BINDGEN_RS_FILE"));

fn extern_c_add(a: i32, b: i32) -> i32 {
    return unsafe { add(a, b) };
}

#[cfg(test)]
mod tests {
    use crate::extern_c_add;

    fn rust_add(a: i32, b: i32) -> i32 {
        return a + b;
    }

    #[test]
    fn test_extern_add_works() {
        let a = -3;
        let b = 1;
        assert!(extern_c_add(a, b) == rust_add(a, b));
    }
}