Can You Tell What Button Is What On A Joystick

[zacaj]

I was wondering, if using a cradle, and you have a controller plugged in, if its possible to tell whats up, down, a, b, etc, without asking the user to press all the buttons?

 

[woogal]

Dp, down etc are stick directions not buttons so the user won't need to confirm them, but other buttons are just numbered and I don't think it's possible to tell what's mapped to what without asking the user.

 

[quasist]

I remember SDL has some functions returning numbers of buttons/axises. That is brings ease