add async implementation of Input

this is just copied and pasted for now, need to figure out how to
generate one from the other

1 files changed, 45 insertions, 0 deletions

diff --git a/src/raw_guard.rs b/src/raw_guard.rs
new file mode 100644
index 0000000..909ba9e
--- /dev/null
+++ b/src/raw_guard.rs
@@ -0,0 +1,45 @@
+use std::os::unix::io::AsRawFd as _;
+
+pub struct RawGuard {
+    termios: nix::sys::termios::Termios,
+    cleaned_up: bool,
+}
+
+impl RawGuard {
+    #[allow(clippy::new_without_default)]
+    pub fn new() -> Self {
+        let stdin = std::io::stdin().as_raw_fd();
+        let termios = nix::sys::termios::tcgetattr(stdin).unwrap();
+        let mut termios_raw = termios.clone();
+        nix::sys::termios::cfmakeraw(&mut termios_raw);
+        nix::sys::termios::tcsetattr(
+            stdin,
+            nix::sys::termios::SetArg::TCSANOW,
+            &termios_raw,
+        )
+        .unwrap();
+        Self {
+            termios,
+            cleaned_up: false,
+        }
+    }
+
+    pub fn cleanup(&mut self) {
+        if self.cleaned_up {
+            return;
+        }
+        self.cleaned_up = true;
+        let stdin = std::io::stdin().as_raw_fd();
+        let _ = nix::sys::termios::tcsetattr(
+            stdin,
+            nix::sys::termios::SetArg::TCSANOW,
+            &self.termios,
+        );
+    }
+}
+
+impl Drop for RawGuard {
+    fn drop(&mut self) {
+        self.cleanup();
+    }
+}