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use libc::{termios, winsize};
pub fn size() -> Option<winsize> {
unsafe {
let mut window: winsize = std::mem::zeroed();
if libc::ioctl(1, libc::TIOCGWINSZ, &mut window) < 0 {
return None;
}
return Some(window);
}
}
fn get_attr() -> Option<termios> {
unsafe {
let mut attr: termios = std::mem::zeroed();
if libc::tcgetattr(1, &mut attr) < 0 {
return None;
}
return Some(attr);
}
}
fn set_attr(attrs: &termios) -> Option<()> {
unsafe {
if libc::tcsetattr(1, libc::TCSANOW, attrs) < 0 {
return None;
}
return Some(());
}
}
fn make_raw() -> termios {
unsafe {
let mut attr: termios = std::mem::zeroed();
libc::cfmakeraw(&mut attr);
return attr;
}
}
pub struct RawHandle {
old: termios,
}
impl Drop for RawHandle {
fn drop(&mut self) {
set_attr(&self.old);
}
}
pub fn raw() -> Option<RawHandle> {
let old = match get_attr() {
Some(old) => old,
None => {
return None;
}
};
if let None = set_attr(&make_raw()) {
return None;
}
return Some(RawHandle { old: old });
}
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