al_ref_cstr - Allegro 5 API

       Create  a  string  that  references  the  storage  of a C-style string.  The information about the string
       (e.g. its size) is stored in the structure pointed to by the info parameter.  The string  will  not  have
       any  other  storage  allocated  of  its  own,  so if you allocate the info structure on the stack then no
       explicit “free” operation is required.

       The string is valid until the underlying C string disappears.

       Example:

              ALLEGRO_USTR_INFO info;
              ALLEGRO_USTR *us = al_ref_cstr(&info, "my string");

       al_ref_cstr - Allegro 5 API

al_ref_buffer(3alleg5), al_ref_ustr(3alleg5)

Allegro reference manual                                                                    al_ref_cstr(3alleg5)

              #include <allegro5/allegro.h>

              const ALLEGRO_USTR *al_ref_cstr(ALLEGRO_USTR_INFO *info, const char *s)