[mucurses] Implement curs_set() to control cursor visibility

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/hci/mucurses/ansi_screen.c

 	return iskey();
 }
 
+static void ansiscr_cursor ( struct _curses_screen *scr __unused,
+			     int visibility ) {
+	printf ( "\033[?25%c", ( visibility ? 'h' : 'l' ) );
+}
+
 SCREEN _ansi_screen = {
 	.init		= ansiscr_init,
 	.exit		= ansiscr_exit,
 	.putc		= ansiscr_putc,
 	.getc		= ansiscr_getc,
 	.peek		= ansiscr_peek,
+	.cursor		= ansiscr_cursor,
 };

src/hci/mucurses/mucurses.c

 	_wupdcurs(win);
 	return OK;
 }
+
+/**
+ * Set cursor visibility
+ *
+ * @v visibility cursor visibility
+ */
+int curs_set ( int visibility ) {
+	stdscr->scr->cursor ( stdscr->scr, visibility );
+	return OK;
+}

src/hci/mucurses/wininit.c

 int endwin ( void ) {
 	attrset ( 0 );
 	color_set ( 0, NULL );
+	curs_set ( 1 );
 	mvprintw ( ( LINES - 1 ), 0, "\n" );
 	stdscr->scr->exit( stdscr->scr );
 	return OK;

src/include/curses.h

 	 * @ret FALSE	no character waiting in stream
 	 */
 	bool ( *peek ) ( struct _curses_screen *scr );
+	/**
+	 * Set cursor visibility
+	 *
+	 * @v scr	screen on which to operate
+	 * @v visibility cursor visibility
+	 */
+	void ( * cursor ) ( struct _curses_screen *scr, int visibility );
 } SCREEN;
 
 /** Curses Window struct */