build/rust/tests/test_cpp_api_from_rust/lib.rs

// Copyright 2026 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

chromium::import! {
    "//build/rust/tests/test_cpp_api_from_rust:other_lib"
}

/// Public function which multiplies two integers.
///
/// Used as as smoke test of the infrastructure for generating C++ bindings to
/// public Rust APIs.
pub fn mul_two_ints_via_rust(x: i32, y: i32) -> i32 {
    x * y
}

/// Public function that returns a Rust `char`.
///
/// Used to test `crubit/support/...` libraries.  In particular, support for
/// `char` depends on `crubit/support/rs_std/char.h`.
pub fn get_ascii_char_or_panic(code: u8) -> char {
    let c = char::from_u32(code as u32).unwrap();
    assert!(c.is_ascii());
    c
}

/// Public function which returns a `Multiplier` object.
///
/// Used to test bindings which depend on types defined in other crates.
/// (It also showcases Crubit's ability to pass Rust objects **by value**
/// over the FFI boundary.)
pub fn create_multiplier(x: i32) -> other_lib::Multiplier {
    other_lib::Multiplier::new(x)
}

/// Public function which returns an `std::time::Duration` object.
///
/// Used to test bindings which depend on types defined in Rust standard
/// library.
pub fn create_duration_from_seconds(seconds: u64) -> std::time::Duration {
    std::time::Duration::from_secs(seconds)
}