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use std::io::{Read, Write};
use std::io::{BufReader, BufWriter};
use std::io::{Stdin, Stdout};
pub struct StreamDevice {
pub wake_flag: bool,
pub input_control: bool,
pub output_control: bool,
pub stdin: BufReader<Stdin>,
pub stdout: BufWriter<Stdout>,
}
impl StreamDevice {
pub fn new() -> Self {
Self {
wake_flag: false,
input_control: true,
output_control: true,
stdin: BufReader::new(std::io::stdin()),
stdout: BufWriter::new(std::io::stdout()),
}
}
pub fn flush_local(&mut self) {
self.stdout.flush().unwrap();
}
pub fn read_queue_len(&self) -> usize {
self.stdin.buffer().len()
}
pub fn read_stdin(&mut self) -> u8 {
let mut buffer = [0; 1];
match self.stdin.read_exact(&mut buffer) {
Ok(_) => buffer[0],
Err(_) => 0,
}
}
pub fn write_stdout(&mut self, val: u8) {
self.stdout.write_all(&[val]).unwrap();
}
}
impl Drop for StreamDevice {
fn drop(&mut self) {
self.flush_local();
}
}
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