rcore-tutorial/user/src/console.rs
2022-01-21 14:21:32 -08:00

31 lines
637 B
Rust

use super::write;
use core::fmt::{self, Write};
struct Stdout;
const STDOUT: usize = 1;
impl Write for Stdout {
fn write_str(&mut self, s: &str) -> fmt::Result {
write(STDOUT, s.as_bytes());
Ok(())
}
}
pub fn print(args: fmt::Arguments) {
Stdout.write_fmt(args).unwrap();
}
#[macro_export]
macro_rules! print {
($fmt: literal $(, $($arg: tt)+)?) => {
$crate::console::print(format_args!($fmt $(, $($arg)+)?));
}
}
#[macro_export]
macro_rules! println {
($fmt: literal $(, $($arg: tt)+)?) => {
$crate::console::print(format_args!(concat!($fmt, "\n") $(, $($arg)+)?));
}
}