add tui_poll_noprefix()

tui.c

@@ -307,6 +307,27 @@ tui_poll()
 	}
 }
 
+struct event
+tui_poll_noprefix()
+{
+	char c;
+
+	/* change attributes to make the program wait for input */
+	raw.c_cc[VMIN] = 1;
+	if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1)
+		die("tcsetattr");
+
+	read(STDIN_FILENO, &c, 1);
+	/* reset attributes */
+	raw.c_cc[VMIN] = 0;
+	if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1)
+		die("tcsetattr");
+	
+	return (struct event) {
+		0, c
+	};
+}
+
 struct event
 tui_peek()
 {

tui.h

@@ -175,10 +175,15 @@ void tui_show_cursor();
 void tui_set_cursor(int, int);
 
 /* tui_poll() waits for input, and returns the event it recieved.
+ * tui_poll_noprefix() works the same way as tui_poll(), only it does not handle
+ * prefix keys (like escape). This means it can be used wherever one does not
+ * care about prefix keys or when you just want to check if the user has pressed
+ * escape.
  * tui_peek() gets buffered input. The program will not stop and wait for input,
  * like tui_poll(), but buffered input will be returned.
  */
 struct event tui_poll();
+struct event tui_poll_noprefix();
 struct event tui_peek();