From 43ecff5a013a314dfe77ce0c3dc21777caf71a07 Mon Sep 17 00:00:00 2001
From: Ian Douglas Scott <ian@iandouglasscott.com>
Date: Sun, 18 Jun 2017 18:32:11 -0700
Subject: [PATCH] Redox OS support

---
 Cargo.toml       |  3 +++
 src/tty/mod.rs   |  5 +++++
 src/tty/redox.rs | 13 +++++++++++++
 3 files changed, 21 insertions(+)
 create mode 100644 src/tty/redox.rs

diff --git a/Cargo.toml b/Cargo.toml
index 1f189dfb..6c388767 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,5 +14,8 @@ time = "0.1.35"
 winapi = "0.2"
 kernel32-sys = "0.2"
 
+[target.'cfg(target_os = "redox")'.dependencies]
+termion = "1.4"
+
 [dev-dependencies]
 rand = "0.3.14"
diff --git a/src/tty/mod.rs b/src/tty/mod.rs
index 65470201..db9dfa55 100644
--- a/src/tty/mod.rs
+++ b/src/tty/mod.rs
@@ -21,3 +21,8 @@ pub use self::unix::*;
 mod windows;
 #[cfg(windows)]
 pub use self::windows::*;
+
+#[cfg(target_os = "redox")]
+mod redox;
+#[cfg(target_os = "redox")]
+pub use self::redox::*;
diff --git a/src/tty/redox.rs b/src/tty/redox.rs
new file mode 100644
index 00000000..2f9bd8c2
--- /dev/null
+++ b/src/tty/redox.rs
@@ -0,0 +1,13 @@
+extern crate termion;
+use super::{Width, Height};
+
+pub fn terminal_size() -> Option<(Width, Height)> {
+    match termion::terminal_size() {
+        Ok((cols, rows)) => Some((Width(cols), Height(rows))),
+        Err(..) => None
+    }
+}
+
+pub fn move_cursor_up(n: usize) -> String {
+    format!("{}", termion::cursor::Up(n as u16))
+}