lib.rs

//  Copyright (C) 2019  Éloïs SANCHEZ
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

//! Common rust tools for DURS project.

#![deny(
    missing_docs,
    missing_debug_implementations,
    missing_copy_implementations,
    trivial_casts,
    trivial_numeric_casts,
    unsafe_code,
    unstable_features,
    unused_import_braces
)]

/// Interrupts the program and log error message
/// WARNING: this macro must not be called before the logger is initialized !
#[macro_export]
macro_rules! fatal_error {
    ($msg:expr) => ({
        error!("{}", &dbg!($msg));
        panic!($msg);
    });
    ($msg:expr,) => ({
        error!("{}", &dbg!($msg));
        panic!($msg);
    });
    ($fmt:expr, $($arg:tt)+) => ({
        error!("{}", dbg!(format!($fmt, $($arg)+)));
        panic!($fmt, $($arg)+);
    });
}

/*macro_rules! error {
    (target: $target:expr, $($arg:tt)+) => (
        log!(target: $target, $crate::Level::Error, $($arg)+);
    );
    ($($arg:tt)+) => (
        log!($crate::Level::Error, $($arg)+);
    )
}*/

/// Unescape backslash
pub fn unescape_str(source: &str) -> String {
    let mut previous_char = None;
    let mut str_result = String::with_capacity(source.len());

    for current_char in source.chars() {
        if previous_char.is_some() && previous_char.unwrap() == '\\' {
            match current_char {
                '\\' => {} // Do nothing
                _ => str_result.push(current_char),
            }
        } else {
            str_result.push(current_char);
        }
        previous_char = Some(current_char);
    }

    str_result
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    pub fn test_unescape_str() {
        assert_eq!("\\".to_owned(), unescape_str("\\\\"));
    }
}