like, for instance:
```rs
#[no_mangle]
pub extern "C" fn rust_log(level: LogLevel, message: *const c_char) {
    let c_str = unsafe { CStr::from_ptr(message) };
    let str_slice = c_str.to_str().unwrap_or("");

    match level {
        LogLevel::Error => defmt::error!("{}", str_slice),
        LogLevel::Warn => defmt::warn!("{}", str_slice),
        _ => defmt::info!("{}", str_slice),
    }
}
```

and 
```c
void c_log_stub(acc_log_level_t level, const char *module, const char *format, ...) {
    char buffer[256];
    va_list args;
    va_start(args, format);
    vsnprintf(buffer, sizeof(buffer), format, args);
    va_end(args);

    rust_log(level, buffer); // Call the Rust function
}
```