Add lab04

Signed-off-by: Richard Qin <richard.qin.x@gmail.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/lab04/tui.h b/lab04/tui.h
new file mode 100644
index 0000000..e28e698
--- /dev/null
+++ b/lab04/tui.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2026 Richard Qin */
+
+#ifndef TUI_H
+#define TUI_H
+
+#include <stdbool.h>
+#include <stddef.h>
+
+enum tui_key_kind {
+    TUI_KEY_CHARACTER,
+    TUI_KEY_UP,
+    TUI_KEY_DOWN,
+    TUI_KEY_LEFT,
+    TUI_KEY_RIGHT,
+    TUI_KEY_ENTER,
+    TUI_KEY_ESCAPE,
+    TUI_KEY_BACKSPACE,
+};
+
+struct tui_event {
+    enum tui_key_kind kind;
+    int character;
+};
+
+bool tui_init(void);
+void tui_shutdown(void);
+
+void tui_clear(void);
+void tui_hide_cursor(void);
+void tui_show_cursor(void);
+void tui_printf(const char *format, ...);
+
+struct tui_event tui_read_key(void);
+bool tui_read_line(const char *prompt, char *buffer, size_t capacity);
+void tui_wait(void);
+
+#endif /* TUI_H */