al_ustr_ncompare
int al_ustr_ncompare(const ALLEGRO_USTR *us1, const ALLEGRO_USTR *us2, int n)
Introduced in 5.0.0
Like al_ustr_compare but only compares up to the first n code points of both strings.
Returns zero if the strings are equal, a positive number if us1 comes after us2, else a negative number.
Examples: ex_utf8