/* Copyright (C) 2023 Open Information Security Foundation

 *

 * You can copy, redistribute or modify this Program under the terms of

 * the GNU General Public License version 2 as published by the Free

 * Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * version 2 along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA.

 */

//! Rust bindings to the "feature" API.

//!

//! As this feature module is a binding to a Suricata C module it is

//! not available to Rust unit tests. Instead when running Rust unit

//! tests and "mock" version is provided that will return true for any

//! feature starting with "true" and false for any other feature name.

#[cfg(test)]

mod mock {

    /// Check for a feature returning true if found.

    ///

    /// This a "mock" variant of `requires` that will return true for

    /// any feature starting with string `true`, and false for

    /// anything else.

    pub fn requires(feature: &str) -> bool {

        return feature.starts_with("true");

    }

}

#[cfg(not(test))]

mod real {

    use std::ffi::CString;

    use std::os::raw::c_char;

    extern "C" {

        fn RequiresFeature(feature: *const c_char) -> bool;

    }

    /// Check for a feature returning true if found.

    pub fn requires(feature: &str) -> bool {

        if let Ok(feature) = CString::new(feature) {

            unsafe { RequiresFeature(feature.as_ptr()) }

        } else {

            false

        }

    }

}

#[cfg(not(test))]

pub use real::*;

#[cfg(test)]

pub use mock::*;