al_ustr_find_cstr - Man Page

#include <allegro5/allegro.h>

int al_ustr_find_cstr(const ALLEGRO_USTR *haystack, int start_pos,
   const char *needle)

Like al_ustr_find_str(3) but takes a C-style string for needle.

al_ustr_find_str(3), al_ustr_rfind_cstr(3)