Allegro 5 api
#include <allegro5/allegro.h> int al_ustr_find_str(const ALLEGRO_USTR *haystack, int start_pos, const ALLEGRO_USTR *needle)
Find the first occurrence of string needle in haystack, beginning from byte offset pos (inclusive). Return the byte offset of the occurrence if it is found, otherwise return -1.
al_ustr_find_cstr(3alleg5), al_ustr_rfind_str(3alleg5), al_ustr_find_replace(3alleg5)