DOKK / manpages / debian 10 / allegro5-doc / al_ustr_find_str.3alleg5.en
al_ustr_find_str(3alleg5) al_ustr_find_str(3alleg5)

al_ustr_find_str - 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 start_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)

Allegro reference manual