add_charmap_impl
add_charmap_impl(sym, mbs, mbs_len, 1);
add_charmap_impl(nn, tmbs, mbs_len, 1);
add_charmap_impl(name, mbs, 1, 0);
add_charmap_impl(sym, c, 1);
add_charmap_impl(sym, -1, 0);
add_charmap_impl(nn, wc, 1);
add_charmap_impl(name, val, 0);