1 files changed, 38 insertions, 0 deletions

diff --git a/src/RawMode.zig b/src/RawMode.zig
new file mode 100644
index 0000000..ed71819
--- /dev/null
+++ b/src/RawMode.zig
@@ -0,0 +1,38 @@
+const linux = std.os.linux;
+const std = @import("std");
+
+const STDIN_FILENO = std.os.STDIN_FILENO;
+const RawMode = @This();
+const tcflag_t = linux.tcflag_t;
+const tcgetattr = std.os.tcgetattr;
+const tcsetattr = std.os.tcsetattr;
+const termios = std.os.termios;
+
+orig: termios,
+
+pub fn init() !RawMode {
+    const orig = try tcgetattr(STDIN_FILENO);
+    const self = RawMode{ .orig = orig };
+    errdefer self.deinit();
+
+    var raw = orig;
+
+    raw.iflag &= ~@as(tcflag_t, linux.BRKINT | linux.ICRNL | linux.INPCK | linux.ISTRIP | linux.IXON);
+    raw.lflag &= ~@as(tcflag_t, linux.ECHO | linux.ICANON | linux.IEXTEN | linux.ISIG);
+    raw.oflag &= ~@as(tcflag_t, linux.OPOST);
+
+    raw.cflag |= linux.CS8;
+
+    raw.cc[linux.V.MIN] = 0;
+    raw.cc[linux.V.TIME] = 1;
+
+    try tcsetattr(STDIN_FILENO, .FLUSH, raw);
+
+    return self;
+}
+
+pub fn deinit(self: RawMode) void {
+    tcsetattr(STDIN_FILENO, .FLUSH, self.orig) catch |err| {
+        std.log.err("Failed to reset termios: {}", .{err});
+    };
+}