Ubuntu, C++, xkb/symbols files: Is there a mapping between keynames and keycode?

Question

In usr/share/x11/xkb/symbols/ there are files for definitions of key of a keyboard e.g. usr/share/x11/xkb/symbols/us:

key <AD01> {    [     q,    Q       ]   };
key <AD02> {    [     w,    W       ]   };
key <AD03> {    [     e,    E       ]   };
key <AD04> {    [     r,    R       ]   };
key <AD05> {    [     t,    T       ]   };
key <AD06> {    [     y,    Y       ]   };

• Where key <AD01> is a name of the key.
• When working with x11 I want to use keycodes.

Is there a mapping of name of keys to keycodes available or do i need to figure them out myself?

I am looking for something like

• <AD01> -- 24
• <AD02> -- 25
• <AD03> -- 26