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/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-10-10 foxglove RT-Thread Output implementation
*/
use crate::bindings::librt::rt_kprintf;
use core::fmt::{self, Write};
use core::cmp::min;
fn up_cast(a: usize, b: usize) -> usize {
let r = a / b;
return if a % b == 0 { r } else { r + 1 };
}
fn puts(str: &str, kp: fn(s: *const u8)) {
let str = str.as_bytes();
let mut buf = [0 as u8; 129];
for i in 0..up_cast(str.len(), 128) {
let end = min(128, str.len() - i * 128);
for j in 0..end {
buf[j] = str[(j + i * 128) as usize];
}
buf[end] = 0;
kp(buf.as_ptr())
}
}
struct StdOut;
impl fmt::Write for StdOut {
fn write_str(&mut self, s: &str) -> fmt::Result {
fn rtt_kputs(s: *const u8) {
unsafe {
/* Use kprintf with "%s" format to avoid dependency on rt_kputs symbol */
rt_kprintf(b"%s\0".as_ptr(), s);
}
}
puts(s, rtt_kputs);
Ok(())
}
}
pub fn _print(args: fmt::Arguments) {
unsafe {
StdOut.write_fmt(args).unwrap_unchecked();
}
}
#[macro_export]
macro_rules! print {
($($arg:tt)*) => ({
$crate::out::_print(format_args!($($arg)*));
});
}
#[macro_export]
macro_rules! println {
() => ({
$crate::out::_print(format_args!("\n"));
});
($($arg:tt)*) => ({
$crate::out::_print(format_args!("{}\n", format_args!($($arg)*)));
});
}
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