Allegro 5 api
#include <allegro5/allegro.h> int al_ustr_find_chr(const ALLEGRO_USTR *us, int start_pos, int32_t c)
Search for the encoding of code point c in us from byte offset start_pos (inclusive).
Returns the position where it is found or -1 if it is not found.
al_ustr_rfind_chr(3alleg5)