ostd 0.8.4

Rust OS framework that facilitates the development of and innovation in OS kernels
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// SPDX-License-Identifier: MPL-2.0

//! The console I/O.

use alloc::fmt;
use core::fmt::Write;

/// Prints the formatted arguments to the standard output using the serial port.
#[inline]
pub fn print(args: fmt::Arguments) {
    Stdout.write_fmt(args).unwrap();
}

/// The callback function for console input.
pub type InputCallback = dyn Fn(u8) + Send + Sync + 'static;

/// Registers a callback function to be called when there is console input.
pub fn register_console_input_callback(_f: &'static InputCallback) {
    todo!()
}

struct Stdout;

impl Write for Stdout {
    fn write_str(&mut self, s: &str) -> fmt::Result {
        for &c in s.as_bytes() {
            send(c);
        }
        Ok(())
    }
}

/// Initializes the serial port.
pub(crate) fn init() {}

/// Sends a byte on the serial port.
pub fn send(data: u8) {
    sbi_rt::console_write_byte(data);
}