Allegro 5 api
#include <allegro5/allegro.h> int al_ustr_rfind_str(const ALLEGRO_USTR *haystack, int end_pos, const ALLEGRO_USTR *needle)
Find the last occurrence of string needle in haystack before byte offset end_pos (exclusive). Return the byte offset of the occurrence if it is found, otherwise return -1.
al_ustr_rfind_cstr(3alleg5), al_ustr_find_str(3alleg5)