al_ustr_assign_cstr - Allegro 5 API

       Overwrite  the  string  us1 with the contents of the C-style string s.  Returns true on success, false on
       error.

       al_ustr_assign_cstr - Allegro 5 API

al_ustr_assign_substr(3alleg5), al_ustr_assign_cstr(3alleg5)

Allegro reference manual                                                            al_ustr_assign_cstr(3alleg5)

              #include <allegro5/allegro.h>

              bool al_ustr_assign_cstr(ALLEGRO_USTR *us1, const char *s)