cres 0.9.1

Cell resampling for collider events
Documentation 
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use crate::c_api::error::LAST_ERROR;

use std::ffi::{CStr, OsStr};
use std::os::raw::c_char;
use std::os::unix::ffi::OsStrExt;

use anyhow::anyhow;
use env_logger::Env;

/// Initialise logger from environment variable
///
/// The name of the environment variable must be a valid utf8 string.
///
/// # Safety
///
/// The passed pointer must point to a valid null-terminated C string.
///
/// # Return values
///
/// - `0`: success
/// - `-1`: rust panic, check with `cres_get_last_err` or `cres_print_last_err`
#[no_mangle]
#[must_use]
pub unsafe extern "C" fn cres_logger_from_env(env_var: *const c_char) -> i32 {
    let res = std::panic::catch_unwind(|| {
        let env_var = unsafe { CStr::from_ptr(env_var) };
        let env_var = OsStr::from_bytes(env_var.to_bytes());
        let env_var = env_var.to_str().unwrap();

        let env = Env::default().filter_or(env_var, "info");

        env_logger::init_from_env(env);
    });

    if let Err(err) = res {
        LAST_ERROR
            .with(|e| *e.borrow_mut() = Some(anyhow!("panic: {:?}", err)));
        -1
    } else {
        0
    }
}