Finding an ASCII keysym for a keycode

gistfile1.c

static xkb_keysym_t
get_ascii(struct xkb_state *state, xkb_keycode_t keycode)
{
    struct xkb_keymap *keymap;
    xkb_layout_index_t num_layouts;
    xkb_layout_index_t layout;
    xkb_level_index_t level;
    const xkb_keysym_t *syms;
    int num_syms;

    keymap = xkb_state_get_keymap(state);
    num_layouts = xkb_keymap_num_layouts_for_key(keymap, keycode);

    for (layout = 0; layout < num_layouts; layout++) {
        level = xkb_state_key_get_level(state, keycode, layout);
        num_syms = xkb_keymap_key_get_syms_by_level(keymap, keycode,
                                                    layout, level, &syms);
        if (num_syms != 1)
            continue;

        if (syms[0] > 0 && xkb_keysym_to_utf32(syms[0]) < 128)
            return syms[0];
    }

    return XKB_KEY_NoSymbol;
}