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use super::*;
use log::{Level, Metadata, Record};
use std::io::Write;
pub struct RetroLogger {
callback: retro_log_callback,
log_level: Level,
}
impl RetroLogger {
pub fn new(callback: retro_log_callback) -> Self {
Self {
callback,
log_level: Level::Debug,
}
}
fn get_retro_log_level(level: Level) -> retro_log_level {
match level {
Level::Error => retro_log_level::RETRO_LOG_ERROR,
Level::Warn => retro_log_level::RETRO_LOG_WARN,
Level::Info => retro_log_level::RETRO_LOG_INFO,
Level::Debug => retro_log_level::RETRO_LOG_DEBUG,
Level::Trace => retro_log_level::RETRO_LOG_DEBUG,
}
}
}
impl log::Log for RetroLogger {
fn enabled(&self, metadata: &Metadata) -> bool {
metadata.level() <= self.log_level
}
fn log(&self, record: &Record) {
if !self.enabled(record.metadata()) {
return;
}
let target = if !record.target().is_empty() {
record.target()
} else {
record.module_path().unwrap_or_default()
};
if let Some(cb) = self.callback.log {
let mut args: Vec<u8> = Vec::new();
if writeln!(args, "{}\0", record.args()).is_ok() {
let level = Self::get_retro_log_level(record.level());
let target = CString::new(target).unwrap();
unsafe {
let args = CString::from_vec_unchecked(args);
(cb)(
level,
"[%s] %s\n\0".as_ptr() as *const c_char,
target.as_ptr() as *const c_char,
args.as_ptr() as *const c_char,
)
}
}
} else {
let level = match record.level() {
Level::Debug => "DEBUG",
Level::Info => "INFO",
Level::Warn => "WARN",
Level::Error => "ERROR",
Level::Trace => "TRACE",
};
let stderr = std::io::stderr();
let mut stderr_lock = stderr.lock();
let _ = writeln!(
stderr_lock,
"[libretro {}] [{}] {}",
level,
target,
record.args()
);
}
}
fn flush(&self) {
}
}
