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use std::sync::atomic::{AtomicU8, Ordering};
use log::LevelFilter;
static LOG_LEVEL: AtomicU8 = AtomicU8::new(0);
pub fn set_level(level: LevelFilter) {
let byte_repr = discriminant_of(level);
LOG_LEVEL.store(byte_repr, Ordering::SeqCst);
}
pub fn get_level() -> Option<LevelFilter> {
level_of(LOG_LEVEL.load(Ordering::SeqCst))
}
pub fn get_level_str() -> Option<&'static str> {
let level = get_level();
if let None = level {
return None;
}
match level.unwrap() {
LevelFilter::Off => Some("off"),
LevelFilter::Error => Some("error"),
LevelFilter::Warn => Some("warn"),
LevelFilter::Info => Some("info"),
LevelFilter::Debug => Some("debug"),
LevelFilter::Trace => Some("trace"),
}
}
fn discriminant_of(filter: LevelFilter) -> u8 {
match filter {
LevelFilter::Trace => 1,
LevelFilter::Debug => 2,
LevelFilter::Info => 3,
LevelFilter::Warn => 4,
LevelFilter::Error => 5,
LevelFilter::Off => 6,
}
}
fn level_of(filter: u8) -> Option<LevelFilter> {
match filter {
0 => None,
1 => Some(LevelFilter::Trace),
2 => Some(LevelFilter::Debug),
3 => Some(LevelFilter::Info),
4 => Some(LevelFilter::Warn),
5 => Some(LevelFilter::Error),
6 => Some(LevelFilter::Off),
_ => unreachable!("unreachable level discriminant"),
}
}