add raw mode

1 files changed, 59 insertions, 0 deletions

diff --git a/include/line/mode.h b/include/line/mode.h
new file mode 100644
index 0000000..8811e66
--- /dev/null
+++ b/include/line/mode.h
@@ -0,0 +1,59 @@
+#pragma once
+
+#include <unistd.h>
+#include <termios.h>
+#include <stdlib.h>
+
+using namespace std; // TODO: remove
+
+namespace ov4
+{
+
+inline termios attr;
+
+void disable_raw()
+{
+    tcsetattr(STDIN_FILENO, TCSAFLUSH, &attr);
+}
+
+void enable_raw()
+{
+    termios attr_raw;
+    tcgetattr(STDIN_FILENO, &attr);
+    tcgetattr(STDIN_FILENO, &attr_raw);
+
+    // LOCAL
+
+    // disable
+    // echo
+    // canonical
+    // signal
+    // disable post-input processing, aka control-V
+    attr_raw.c_lflag &= ~(ECHO | ICANON | ISIG | IEXTEN);
+
+    // INPUT
+
+    // disable 
+    // software flow control, aka control-S/Q
+    // \n and \r conversion
+    attr_raw.c_iflag &= ~(IXON | ICRNL);
+
+    // OUTPUT
+
+    // disable
+    // post-output processing
+    attr_raw.c_oflag &= ~(OPOST);
+
+    // misc
+    attr_raw.c_iflag &= ~(BRKINT | INPCK | ISTRIP);
+    attr_raw.c_cflag |= ~(CS8);
+
+    atexit(disable_raw);
+
+    // TCSAFLUSH
+    // the change shall occur after all output written to fildes is transmitted
+    // and all input so far received but not read shall be discarded before the change is made
+    tcsetattr(STDIN_FILENO, TCSAFLUSH, &attr_raw);
+}
+
+}