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use core::fmt;
#[cfg(feature = "alloc")]
use alloc::vec::Vec;
pub struct ConsoleOutput<'a> {
#[cfg(feature = "alloc")]
buf: Vec<u8>,
callback: &'a mut dyn FnMut(&[u8]),
}
impl<'a> fmt::Write for ConsoleOutput<'a> {
fn write_str(&mut self, s: &str) -> fmt::Result {
self.write_raw(s.as_bytes());
Ok(())
}
}
impl<'a> ConsoleOutput<'a> {
pub(crate) fn new(callback: &'a mut dyn FnMut(&[u8])) -> ConsoleOutput<'a> {
ConsoleOutput {
#[cfg(feature = "alloc")]
buf: Vec::new(),
callback,
}
}
pub fn write_raw(&mut self, bytes: &[u8]) {
cfg_if::cfg_if! {
if #[cfg(feature = "alloc")] {
self.buf.extend_from_slice(bytes);
} else {
(self.callback)(bytes);
}
}
}
#[cfg(feature = "alloc")]
pub fn flush(&mut self) {
if !self.buf.is_empty() {
(self.callback)(&self.buf);
self.buf.clear()
}
}
}
impl Drop for ConsoleOutput<'_> {
fn drop(&mut self) {
#[cfg(feature = "alloc")]
self.flush()
}
}
#[macro_export]
macro_rules! output {
($console_output:expr, $($args:tt)*) => {{
use std::fmt::Write;
writeln!($console_output, $($args)*).unwrap();
}};
}
#[macro_export]
macro_rules! outputln {
($console_output:expr) => {{
use std::fmt::Write;
let _ = writeln!($console_output);
}};
($console_output:expr,) => {
outputln!($console_output)
};
($console_output:expr, $($args:tt)*) => {{
use std::fmt::Write;
writeln!($console_output, $($args)*).unwrap();
}};
}