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use core::fmt; use core::fmt::Write; pub struct Writer; impl Writer { pub fn write_string(&mut self, s: &str) { for byte in s.bytes() { unsafe { x86_64::instructions::port::PortWrite::write_to_port(0x3f8, byte as u8); } } } } impl fmt::Write for Writer { fn write_str(&mut self, s: &str) -> fmt::Result { self.write_string(s); Ok(()) } } #[macro_export] macro_rules! print { ($($arg:tt)*) => ($crate::output::_print(format_args!($($arg)*))); } #[macro_export] macro_rules! println { () => ($crate::print!("\n")); ($($arg:tt)*) => ($crate::print!("{}\n", format_args!($($arg)*))); } #[doc(hidden)] pub fn _print(args: fmt::Arguments) { Writer.write_fmt(args).unwrap(); }