int al_ustr_compare(const ALLEGRO_USTR *us1, const ALLEGRO_USTR *us2)
Introduced in 5.0.0

This function compares us1 and us2 by code point values. Returns zero if the strings are equal, a positive number if us1 comes after us2, else a negative number.

This does not take into account locale-specific sorting rules. For that you will need to use another library.

See also: al_ustr_ncompare, al_ustr_equal

Examples: ex_utf8