Allegro 5 api
#include <allegro5/allegro.h> bool al_ustr_find_replace(ALLEGRO_USTR *us, int start_pos, const ALLEGRO_USTR *find, const ALLEGRO_USTR *replace)
Replace all occurrences of find in us with replace, beginning at byte offset start_pos. The find string must be non-empty. Returns true on success, false on error.
al_ustr_find_replace_cstr(3alleg5)